Adjusteda odds of depressionb with high-risk allostatic load and biomarker levels by gendered race in National Health and Nutrition Examination Survey 2005–2010, OR (95% CI)c.
\\n\\n
\\n"}]',published:!0,mainMedia:{caption:"Milestone",originalUrl:"/media/original/124"}},components:[{type:"htmlEditorComponent",content:'
Barely three months into the new year and we are happy to announce a monumental milestone reached - 150 million downloads.
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\n\nThank you for making IntechOpen your place of learning, sharing, and discovery, and here’s to 150 million more!
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It incorporates new clinical and research developments as well as future perspectives in the ever-expanding upper and lower airway problems. I dedicate this book to those who provide continued research, high-quality clinical observations, and care, as well as selfless teaching and publications to advance knowledge in airway problems. ENT surgeons, rhinologists, allergologists, immunologists, pulmonologists, postgraduates, researches, trainees, and general practitioners with special interest in one airway disease will find this book useful and interesting.",isbn:"978-1-78984-044-5",printIsbn:"978-1-78984-043-8",pdfIsbn:"978-1-83968-007-6",doi:"10.5772/intechopen.73825",price:119,priceEur:129,priceUsd:155,slug:"rhinosinusitis",numberOfPages:180,isOpenForSubmission:!1,isInWos:null,isInBkci:!1,hash:"14ed95e155b1e57a61827ca30b579d09",bookSignature:"Balwant Singh Gendeh and Mirjana Turkalj",publishedDate:"December 4th 2019",coverURL:"https://cdn.intechopen.com/books/images_new/7062.jpg",numberOfDownloads:10554,numberOfWosCitations:9,numberOfCrossrefCitations:8,numberOfCrossrefCitationsByBook:0,numberOfDimensionsCitations:12,numberOfDimensionsCitationsByBook:0,hasAltmetrics:1,numberOfTotalCitations:29,isAvailableForWebshopOrdering:!0,dateEndFirstStepPublish:"September 11th 2018",dateEndSecondStepPublish:"October 23rd 2018",dateEndThirdStepPublish:"December 22nd 2018",dateEndFourthStepPublish:"March 12th 2019",dateEndFifthStepPublish:"May 11th 2019",currentStepOfPublishingProcess:5,indexedIn:"1,2,3,4,5,6",editedByType:"Edited by",kuFlag:!1,featuredMarkup:null,editors:[{id:"67669",title:null,name:"Balwant Singh",middleName:null,surname:"Gendeh",slug:"balwant-singh-gendeh",fullName:"Balwant Singh Gendeh",profilePictureURL:"https://mts.intechopen.com/storage/users/67669/images/system/67669.png",biography:"Dr Balwant Singh Gendeh is a senior consultant ENT surgeon with sub-specialty interest in rhinology (allergy, Sino nasal diseases, endoscopic sinus, anterior and ventral skull base surgery and functional and cosmetic nasal surgery). He was an ENT registrar at the Royal Infirmary, Middlesbrough, United Kingdom in 1993 and subsequently a JW Fulbright scholar at the University of Pittsburgh, USA in 1997. During his Fulbright experience, he also worked at the Hospital of University of Pennsylvania (HUP), Philadelphia and St Joseph’s Hospital, Chicago, USA with sub-specialty interest in rhinology and aesthetic nasal surgery. Dr BS Gendeh retired after 38 years government service as a consultant ENT surgeon at the National University of Malaysia Medical Centre (UKMMC) in 2014, and presently is a Visiting Professor at the Department of Otorhinolaryngology-Head and Neck Surgery at UKMMC and is a resident ENT consultant at Pantai Hospital Kuala Lumpur since 2014. Is an executive member of numerous National and International bodies including Board Chairman of Malaysian American Commission on Educational Exchange (MACEE) from 2013-2015. Due to his vast contribution to the academia in research and clinical publication, he was elected as a Diploma of Fellowship Academy of Medicine Malaysia (FAMM) in October 2000, International Fellow of the Academy of Otolaryngology Head and Neck Surgery in April 2004, Fellow of the Academy of Sciences Malaysia (FASc) in April 2016 and as Fellow of Malaysian Scientific Association (FMSA) in September 2017. He has written 96 scientific papers with more than 550 citations and editor/co-editor of 8 books and 37 book chapters an H index of 15.",institutionString:"Pantai Hospital Kuala Lumpur",position:null,outsideEditionCount:0,totalCites:0,totalAuthoredChapters:"6",totalChapterViews:"0",totalEditedBooks:"4",institution:null}],equalEditorOne:null,equalEditorTwo:null,equalEditorThree:null,coeditorOne:{id:"219993",title:"Dr.",name:"Mirjana",middleName:null,surname:"Turkalj",slug:"mirjana-turkalj",fullName:"Mirjana Turkalj",profilePictureURL:"https://mts.intechopen.com/storage/users/219993/images/system/219993.png",biography:"Assoc. Prof. Mirjana Turkalj, MD, PhD, graduated from the\nFaculty of Medicine in Zagreb. Since 1998 she has been a pediatric specialist, and from 2005 a subspecialist in allergology and\nclinical immunology, and pulmonology. She was elected scientific\nassistant professor in 2015, and acquired the title of associate professor in 2017. She works as a pediatric subspecialist at Srebrnjak\nChildren’s Hospital in Zagreb, where she is also Deputy Director,\nHead of the Clinical Allergology Center of the Croatian Ministry of Health, and\nHead of the Department for Allergology, Immunology, and Pulmonology. Mirjana is\na lecturer at the Faculty of Medicine, University of Zagreb, and University of Osijek,\nFaculty of Food Technology and Biotechnology, Faculty of Pharmacy and Biochemistry, and Catholic University of Croatia. She is a member of the European Academy\nof Allergology and Clinical Immunology, the European Respiratory Society, the Croatian Medical Association, the Croatian Society for Pediatric Pathology, the Croatian\nSociety for Health Ecology, and many others. Her medical interests are immunological mechanisms in asthma and allergic diseases, pathomechanisms of allergen-specific immunotherapy, the role of infections in the development of allergies, and\nprevention of allergic diseases in children. She has written more than 190 scientific\npapers with more than 400 citations, and 16 book chapters.",institutionString:"Children's Hospital Srebrnjak",position:null,outsideEditionCount:0,totalCites:0,totalAuthoredChapters:"1",totalChapterViews:"0",totalEditedBooks:"0",institution:{name:"Children's Hospital Srebrnjak",institutionURL:null,country:{name:"Croatia"}}},coeditorTwo:null,coeditorThree:null,coeditorFour:null,coeditorFive:null,topics:[{id:"1100",title:"Rhinology",slug:"rhinology"}],chapters:[{id:"68312",title:"Allergic March",doi:"10.5772/intechopen.85553",slug:"allergic-march",totalDownloads:744,totalCrossrefCites:0,totalDimensionsCites:0,hasAltmetrics:0,abstract:"Atopy is an inherited tendency of producing immunoglobulin E on common proteins from the environment like pollen, house mites and food. The presence of atopy represents a risk for the development of allergic diseases like atopic dermatitis, asthma, allergic rhinitis and food allergy, although atopy can also be present only in the form of asymptomatic sensitization. Allergic diseases share common inherited and environmental risk factors, immunologic patterns of allergen-specific Th2 response and efferent phase of immunologic reaction characterized with the production of IgE and activation of granulocytes. The presence of one disease increases the risk for developing other diseases. Allergic diseases demonstrate characteristic sequence of incidence in childhood which is called allergic/atopic march and starts with atopic dermatitis in early infancy. Disrupted integrity of the skin in atopic dermatitis contributes to the development of sensitization and increases the risk for development of other allergic diseases. The discovery of filaggrin gene mutation opens the possibility for causative incidence of allergic diseases and for prevention of development of atopic march. But, the causal link from atopic dermatitis to asthma is still a matter of debate.",signatures:"Blaženka Kljaić Bukvić, Mario Blekić and Marija Pečnjak",downloadPdfUrl:"/chapter/pdf-download/68312",previewPdfUrl:"/chapter/pdf-preview/68312",authors:[{id:"289739",title:"Dr.",name:"Blaženka",surname:"Kljaić Bukvić",slug:"blazenka-kljaic-bukvic",fullName:"Blaženka Kljaić Bukvić"},{id:"296533",title:"Dr.",name:"Marija",surname:"Pečnjak",slug:"marija-pecnjak",fullName:"Marija Pečnjak"},{id:"296535",title:"Dr.",name:"Mario",surname:"Blekić",slug:"mario-blekic",fullName:"Mario Blekić"}],corrections:null},{id:"67186",title:"Local Allergic Rhinitis: An Old Story but a New Entity",doi:"10.5772/intechopen.86212",slug:"local-allergic-rhinitis-an-old-story-but-a-new-entity",totalDownloads:823,totalCrossrefCites:4,totalDimensionsCites:4,hasAltmetrics:0,abstract:"Local allergic rhinitis (LAR) is a novel concept defining clinical allergic rhinitis with no evidence of systemic sensitization to aeroallergens. In this unique condition, the allergic response is confined to the nasal mucosa and can be demonstrated using different methods such as the immunoglobulin-E (IgE) level in the nasal secretions, nasal provocation test (NPT), or basophil activation test (BAT) with specific allergens or more sophisticated molecular diagnostic techniques. Furthermore, local allergic rhinitis can be relieved by interventions used to treat systemic allergic conditions such as antihistamines or anti-IgE monoclonal antibodies. Last but not least, several small studies demonstrated the efficacy of allergen immunotherapy for ameliorating LAR symptoms. In this chapter we reviewed old data and new concepts regarding clinical manifestation, plausible mechanisms, and treatments of LAR. The long-standing question whether LAR is an integral part of the “atopic spectrum” or it is a single-organ immune-mediated disease, is yet to be determined.",signatures:"Ramit Maoz-Segal, Diti Machnes-Maayan, Irena Veksler-Offengenden, Shirly Frizinsky, Soad Hajyahia and Nancy Agmon-Levin",downloadPdfUrl:"/chapter/pdf-download/67186",previewPdfUrl:"/chapter/pdf-preview/67186",authors:[{id:"293794",title:"Dr.",name:"Ramit",surname:"Maoz-Segal",slug:"ramit-maoz-segal",fullName:"Ramit Maoz-Segal"},{id:"293823",title:"Dr.",name:"Diti",surname:"Machnes-Maayan",slug:"diti-machnes-maayan",fullName:"Diti Machnes-Maayan"},{id:"299506",title:"Dr.",name:"Irena",surname:"Veksler-Offengenden",slug:"irena-veksler-offengenden",fullName:"Irena Veksler-Offengenden"},{id:"299508",title:"Dr.",name:"Soad",surname:"Hajyahia",slug:"soad-hajyahia",fullName:"Soad Hajyahia"},{id:"299510",title:"Dr.",name:"Shirly",surname:"Frizinsky",slug:"shirly-frizinsky",fullName:"Shirly Frizinsky"},{id:"299511",title:"Prof.",name:"Nancy",surname:"Agmon-Levin",slug:"nancy-agmon-levin",fullName:"Nancy Agmon-Levin"}],corrections:null},{id:"65679",title:"Use of Nasal Cytology in Diagnosis of Sinonasal Disorders",doi:"10.5772/intechopen.84231",slug:"use-of-nasal-cytology-in-diagnosis-of-sinonasal-disorders",totalDownloads:921,totalCrossrefCites:0,totalDimensionsCites:0,hasAltmetrics:0,abstract:"Nasal cytology is an important diagnostic tool in nasal disorders, especially those regarding nasal mucosa. This technique allows clinicians to observe the morphology and the structure of nasal epithelium cells—such as ciliated, mucous-secreting, striated, and basal cells—and to detect the presence of degenerative or phlogistic phenomena in the respiratory epithelium. Moreover, it makes it easy to identify the presence of inflammatory cells, such as neutrophils, eosinophils, and mast cell. Over the past few years, nasal cytology allowed researchers to discover new clinical issues that were still unexplored: the nonallergic rhinitis with eosinophils, the nonallergic rhinitis with mast cells, the nonallergic rhinitis with neutrophils, and the nonallergic rhinitis with eosinophils and mast cells. Nasal cytology is easy to perform and barely invasive; therefore, it can easily be repeated. Since it makes it possible to evaluate the patient’s response to a therapy, the technique is a very useful tool in follow-up checks of nasal disorders. We have reported in the following chapter our working experience, and we observed the results of cytological exams performed in our Center from 2013 to 2018. We therefore developed an easy and intuitive classification of sinonasal chronic inflammatory diseases.",signatures:"Marco Capelli",downloadPdfUrl:"/chapter/pdf-download/65679",previewPdfUrl:"/chapter/pdf-preview/65679",authors:[{id:"280265",title:"M.D.",name:"Marco",surname:"Capelli",slug:"marco-capelli",fullName:"Marco Capelli"}],corrections:null},{id:"65465",title:"Chronic Sinusitis: The Empiric Treatment Strikes Back: Is CRS Directly Caused by Infectious Agent(s)?",doi:"10.5772/intechopen.84260",slug:"chronic-sinusitis-the-empiric-treatment-strikes-back-is-crs-directly-caused-by-infectious-agent-s-",totalDownloads:850,totalCrossrefCites:0,totalDimensionsCites:0,hasAltmetrics:0,abstract:"Chronic sinusitis leads to unresolved infection and inflammation resulting in tissue remodeling, then further propagates the vicious cycle of deterioration and dysfunction of the sinuses’ natural defense mechanisms, and yet another cycle of infection and mucosal injury. Antibiotic therapy targeting pathogens classically implicated in sinusitis could augment the risk of therapeutic failure through the natural selection of resistant and/or virulent pathogens, especially in the presence of Gram-negative E. coli. Our recent demonstration of highly pathogenic E. coli, detected through intraoperative biopsy of sinus tissue, allowed the resolution of chronic sinusitis symptoms upon E. coli targeted therapy. The isolated E. coli carried three genes, each coding biofilm formation, which may, in part, account for the chronicity of E. coli sinusitis. We recommend that, patients with chronic sinusitis be considered for intraoperative biopsy for unusual pathogens, therefore allowing targeted therapy. In the future, use of vaccines and biofilm inhibitors might be an effective therapeutic consideration.",signatures:"Alexander Nowicki, Natalie Nowicki, Stella Nowicki, Alfred Samet, Michal Michalik, Roger Su, James K. Fortson and Bogdan Nowicki",downloadPdfUrl:"/chapter/pdf-download/65465",previewPdfUrl:"/chapter/pdf-preview/65465",authors:[{id:"281641",title:"Prof.",name:"Bogdan",surname:"Nowicki",slug:"bogdan-nowicki",fullName:"Bogdan Nowicki"},{id:"290331",title:"Dr.",name:"Alexander",surname:"Nowicki",slug:"alexander-nowicki",fullName:"Alexander Nowicki"},{id:"290332",title:"Dr.",name:"Natalie",surname:"Nowicki",slug:"natalie-nowicki",fullName:"Natalie Nowicki"},{id:"290333",title:"Prof.",name:"Stella",surname:"Nowicki",slug:"stella-nowicki",fullName:"Stella Nowicki"},{id:"290334",title:"Dr.",name:"Alfred",surname:"Samet",slug:"alfred-samet",fullName:"Alfred Samet"},{id:"290335",title:"Dr.",name:"Roger",surname:"Su",slug:"roger-su",fullName:"Roger Su"},{id:"290336",title:"Dr.",name:"James K.",surname:"Fortson",slug:"james-k.-fortson",fullName:"James K. Fortson"},{id:"294104",title:"Dr.",name:"Michał",surname:"Michalik",slug:"michal-michalik",fullName:"Michał Michalik"}],corrections:null},{id:"65659",title:"Rhinosinusitis: How Common Are Anatomical Variations Responsible?",doi:"10.5772/intechopen.83689",slug:"rhinosinusitis-how-common-are-anatomical-variations-responsible-",totalDownloads:1021,totalCrossrefCites:1,totalDimensionsCites:1,hasAltmetrics:0,abstract:"The term rhinosinusitis is defined as inflammation of nose and paranasal sinuses characterised by nasal blockage, nasal discharge, post-nasal drip, facial pain, pressure and reduction/loss of smell with corresponding endoscopic appearance and CT scan changes. The combined term is more apt than individual rhinitis or sinusitis as it is unusual for having sinus inflammation alone in the absence of nasal inflammation. The disease occurs due to obstruction in the key area, i.e., the osteomeatal complex (OMC). This chapter discusses anatomical variations responsible for the blockage of OMC leading to rhinosinusitis. Nasal endoscopic findings and radiological features depicting these variations are discussed in detail.",signatures:"Shrikant Phatak and Richa Agrawal",downloadPdfUrl:"/chapter/pdf-download/65659",previewPdfUrl:"/chapter/pdf-preview/65659",authors:[{id:"281662",title:"Dr.",name:"Shrikant",surname:"Phatak",slug:"shrikant-phatak",fullName:"Shrikant Phatak"},{id:"281664",title:"Dr.",name:"Richa",surname:"Agrawal",slug:"richa-agrawal",fullName:"Richa Agrawal"}],corrections:null},{id:"65822",title:"Refractory Rhinosinusitis",doi:"10.5772/intechopen.84714",slug:"refractory-rhinosinusitis",totalDownloads:1075,totalCrossrefCites:0,totalDimensionsCites:0,hasAltmetrics:0,abstract:"Various factors have been proposed to be related to refractory chronic rhinosinusitis (CRS). Treatment for refractory CRS is challenging for ear, nose, and throat (ENT) surgeons. The aim of the study was to determine the clinical features associated with the severity of CRS that may necessitate revision surgery by eliminating the bias of the surgeon’s technique using standardizing surgical procedures. Sinus wall thickness and blood eosinophilia, which may represent the depth of inflammation in CRS, are associated with the need for revision surgery. We found that, when the thickness of the posterolateral maxillary sinus wall is more than 3.03 mm, there is an increased probability for a need for revision surgery. CRS patients with thickened sinus walls were found to have poorer outcomes. Further research is needed in order to justify this type of surgical procedure for CRS.",signatures:"Yi-Tsen Lin and Te-Huei Yeh",downloadPdfUrl:"/chapter/pdf-download/65822",previewPdfUrl:"/chapter/pdf-preview/65822",authors:[{id:"276980",title:"Associate Prof.",name:"Te-Huei",surname:"Yeh",slug:"te-huei-yeh",fullName:"Te-Huei Yeh"},{id:"276981",title:"Dr.",name:"Yi-Tsen",surname:"Lin",slug:"yi-tsen-lin",fullName:"Yi-Tsen Lin"}],corrections:null},{id:"66733",title:"Aneurysmal Bone Cyst in Sino-nasal Region",doi:"10.5772/intechopen.84939",slug:"aneurysmal-bone-cyst-in-sino-nasal-region",totalDownloads:762,totalCrossrefCites:0,totalDimensionsCites:0,hasAltmetrics:0,abstract:"Aneurysmal bone cysts (ABCs) are vascular, rapidly expanding, and locally destructive cystic lesions. It is primarily found in childhood and adolescence. They typically involve the long tubular bones. Approximately 3–6% presented in the head and neck region, with the mandible being the most common site. Involvement of the ethmoid sinuses is extremely rare with only 13 cases reported in English literatures. Here we are presenting as an example an atypical case of an adolescent male patient, which had chief complaint of right-sided nasal blockage and right eye proptosis of 6-month duration. Local examination of the face showed right eye proptosis, with bulging around the right medial canthus and lateral wall of the nose. MRI revealed multiple fluid-fluid levels of varying signal intensities on T2-weighted image suggestive of aneurysmal bone cyst. Endoscopic sinus surgery was carried out to remove the swelling and tissue specimen sent for histopathology, which confirmed the diagnosis. Patient had smooth recovery after. Throughout this chapter, we will discuss aneurysmal bone cyst from its name, origin, and histopathology. Hence, the field of interest here is sino-nasal region, thorough discussion for ABC in sino-nasal region including its clinical presentation, how to reach into diagnosis, treatment method, and finally the prognosis and recurrence.",signatures:"Zeinab AlQudehy and Lena Telmesani",downloadPdfUrl:"/chapter/pdf-download/66733",previewPdfUrl:"/chapter/pdf-preview/66733",authors:[{id:"276867",title:"Dr.",name:"Zeinab",surname:"AlQudehy",slug:"zeinab-alqudehy",fullName:"Zeinab AlQudehy"},{id:"286836",title:"Dr.",name:"Lena",surname:"Telmsani",slug:"lena-telmsani",fullName:"Lena Telmsani"}],corrections:null},{id:"65562",title:"Aerosol Particles in Lungs: Theoretical Modeling of Deposition and Mucociliary Clearance",doi:"10.5772/intechopen.84254",slug:"aerosol-particles-in-lungs-theoretical-modeling-of-deposition-and-mucociliary-clearance",totalDownloads:1050,totalCrossrefCites:1,totalDimensionsCites:1,hasAltmetrics:1,abstract:"A theoretical model of the movement of aerosols in the lungs is proposed. The model is based upon the transport equations taking into account the aerosol inertial deposition processes. Particles move along curvilinear trajectories in self-twisted vortex air flows. Deposition occurs over several cycles of inhalation and exhalation. This mechanism works for particles with a diameter greater than 1–2 microns. All particles with a diameter of 4 microns and more are captured in the respiratory tract before the terminal bronchioles. Only particles with a size of less than 2 microns can penetrate into the respiratory parts of the lungs, but the cleaning coefficient for them is close to unity. The lung cleaning model describes the limiting capabilities of the mucociliarу system. The importance of taking into account the temporal characteristics of the mucociliary escalation of dust deposited in the lungs has been demonstrated. The existence of a mode of accumulation of particles in the lungs, due to a lack of cleaning time during periodic dust exposure, has been established.",signatures:"Gennady Fedorovitch",downloadPdfUrl:"/chapter/pdf-download/65562",previewPdfUrl:"/chapter/pdf-preview/65562",authors:[{id:"279406",title:"Ph.D.",name:"Gennady",surname:"Fedorovitch",slug:"gennady-fedorovitch",fullName:"Gennady Fedorovitch"}],corrections:null},{id:"67836",title:"The Immunology of Asthma and Allergic Rhinitis",doi:"10.5772/intechopen.86964",slug:"the-immunology-of-asthma-and-allergic-rhinitis",totalDownloads:879,totalCrossrefCites:2,totalDimensionsCites:5,hasAltmetrics:0,abstract:"The immune system is a complex collection of cells, tissues, and chemical mediators positioned throughout the body, whose primary purpose is to protect us against infection. However, its function is not only fundamental in protection from infectious disease but also provides aberrant response in allergens such as with asthma and allergic rhinitis. Allergic diseases like asthma and allergic rhinitis are characterized by a distinct type of inflammatory response, driven by immunoglobulin E (IgE)-dependent mechanisms. In asthma and allergic rhinitis, the inflammatory response is mediated by interaction of several immune cells (monocytes, lymphocytes, and polymorphonuclear cells) and cellular chemical mediators. In particular, atopic allergic response leads to destruction of multiple target cells such as epithelial, parenchymal and vascular and connective tissue of the airways. In addition, in inflammatory response in asthma and allergic rhinitis, sensory nerves are sensitized, leading to clinical manifestations. Sneezing and coughing are hypersensitivity responses of sensory nerves in allergic rhinitis and asthma, respectively. Similarly, nasal congestion and discharge in allergic rhinitis are due to vasodilatation that leads to plasma exudates as well as mucous secretion. The allergic inflammatory response is regulated by several transcription factors, particularly nuclear factor-κb (NF-κB), GATA-3 protein 3, and GATA binding protein.",signatures:"Andrew Kiboneka and Dan Kibuule",downloadPdfUrl:"/chapter/pdf-download/67836",previewPdfUrl:"/chapter/pdf-preview/67836",authors:[{id:"202850",title:"Mr.",name:"Dan",surname:"Kibuule",slug:"dan-kibuule",fullName:"Dan Kibuule"},{id:"280538",title:"Dr.",name:"Andrew",surname:"Kiboneka",slug:"andrew-kiboneka",fullName:"Andrew Kiboneka"}],corrections:null},{id:"65767",title:"Turbinate Surgery in Chronic Rhinosinusitis: Techniques and Ultrastructural Outcomes",doi:"10.5772/intechopen.84506",slug:"turbinate-surgery-in-chronic-rhinosinusitis-techniques-and-ultrastructural-outcomes",totalDownloads:1249,totalCrossrefCites:0,totalDimensionsCites:1,hasAltmetrics:1,abstract:"Chronic nasal obstruction due to hypertrophic rhinitis is commonly associated with perennial allergic and nonallergic rhinitis. It is not a simple enlargement of mucosal and submucosal tissues, but it is characterized by deep histological modifications. This pathology, a very frequent condition encountered in rhinological practice, has a significant impact on quality of life. Patients usually complain about sneezing, rhinorrhea, frontal headache, postnasal drip, snoring, blocked nasal ducts, and sleep disorders. When medical therapy fails, surgical reduction of inferior turbinates is mandatory. A large variety of surgical techniques in literature exist, but there is a lack of consensus about which is the proper technique to perform. In this chapter, we describe the most important techniques of inferior turbinate reduction with advantages and disadvantages of each one.",signatures:"Giampiero Neri, Fiorella Cazzato, Elisa Vestrini, Pasquina La Torre, Giampaolo Quaternato, Letizia Neri and Lucia Centurione",downloadPdfUrl:"/chapter/pdf-download/65767",previewPdfUrl:"/chapter/pdf-preview/65767",authors:[{id:"279401",title:"Prof.",name:"Giampiero",surname:"Neri",slug:"giampiero-neri",fullName:"Giampiero Neri"},{id:"281582",title:"Dr.",name:"Fiorella",surname:"Cazzato",slug:"fiorella-cazzato",fullName:"Fiorella Cazzato"},{id:"281583",title:"Dr.",name:"Pasquina",surname:"La Torre",slug:"pasquina-la-torre",fullName:"Pasquina La Torre"},{id:"281584",title:"Prof.",name:"Lucia",surname:"Centurione",slug:"lucia-centurione",fullName:"Lucia Centurione"},{id:"281585",title:"Dr.",name:"Elisa",surname:"Vestrini",slug:"elisa-vestrini",fullName:"Elisa Vestrini"},{id:"290429",title:"Dr.",name:"Giampaolo",surname:"Quaternato",slug:"giampaolo-quaternato",fullName:"Giampaolo Quaternato"},{id:"290430",title:"Mrs.",name:"Letizia",surname:"Neri",slug:"letizia-neri",fullName:"Letizia Neri"}],corrections:null},{id:"69430",title:"Concurrent Rhinoplasty and Endoscopic Sinus Surgery",doi:"10.5772/intechopen.89415",slug:"concurrent-rhinoplasty-and-endoscopic-sinus-surgery",totalDownloads:1180,totalCrossrefCites:0,totalDimensionsCites:0,hasAltmetrics:0,abstract:"Combining rhinoplasty and endoscopic sinus surgery (ESS) was first reported in 1991 by Sheman and Matarasso. Since then, many authors have documented a large series showing the overall efficacy of combining the two procedures. The focus of this manuscript is to document the author’s recent experience with combining rhinoplasty and endoscopic sinus surgery and highlight the changes that have occurred during the author’s 2-years experience. A retrospective data review was performed on 53 (31 females and 22 men, age range 16–55 years) patients who underwent combined rhinoplasty and ESS between January 2016 and December 2018 at Pantai Hospital Kuala Lumpur by the same surgeon. The mean age was 31.8 years. All patients had severe nasal obstruction with chronic rhinosinusitis and were followed up for a minimum of 6 months post-surgery and underwent ENT workup, which included history, office rigid endoscopy, CT scans of paranasal sinuses and preoperative photography. Initially, the ESS was performed followed by the open rhinoplasty with or without osteotomy. The ESS consisted of middle turbinate reduction [15/53 (28.3%)], maxillary antrostomy [36/53 (67.9%)], ethmoidectomy [38/53 (71.6%)], frontal sinusotomy [7/53 (13.2%)], and sphenoidotomy [9/53 (16.9%)]. Most of the sinus symptoms resolved postoperatively with 47 (88.6%) of 53 patients describing their improvement as significant. Fifty (94.3%) of 53 patients stated that they would recommend the concurrent procedure. 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Throughout the history of the United States, disparities in health outcomes between racial groups and individuals of differing ethnic backgrounds have been well documented [1, 2]. Consistently, black and Indigenous persons, and those of Hispanic ethnicity have had poorer overall health, higher rates of both chronic and infectious disease, and increased risk of mortality compared with persons of European ancestry [1, 2, 3, 4]. For decades, investigations into the causes of these unequal health outcomes largely operated under an implicit—and at times explicit—biological determinism framework [5]. Because of this narrow theoretical scope, important contributors—the most important contributors, one could argue—to these racial and ethnic gaps in health status were often overlooked in epidemiologic research [5].
Even as epidemiologists increasingly consider the causal role of the social conditions in which individuals live and work [1, 2, 4, 6], a lack of well-developed theoretical context to health disparities research frequently yields data, results, and interpretations that obfuscate the complex mechanisms underlying social group disparities in health [7]. Wide-spread assumptions of racial homogeneity [8, 9], for example, echo biological essentialism, masking important within-race gender or socioeconomic differences in disease risk, pathogenesis, prognosis, and treatment efficacy, even in those studies which acknowledge social determinants of health.
Theory emerging from the social science and social psychological disciplines is often borne of extensive grappling with these complex causal webs. Intersectionality Theory [10] and Multidimensional Identity Theory [11] are among many theoretical frameworks which outline compelling social and psychological explanations for disparate health outcomes along what are frequently conceptualized as “dimensions” of identity—race, gender, socioeconomic status, and other social group designations. From studies of genetic risk, heath service utilization, and health behaviors to the health-impact of identity processes and coping responses, research grounded in these intersectional theories indicates that socially constructed categories such as race can be further divided into meaningfully distinct categories such as “gendered race” with important implications for accurately assessing the causes of, and solutions for, health disparities [12, 13, 14].
Despite being one of the most increasingly used social theories in epidemiologic research, much of the theoretical nuance of Intersectionality Theory is often lost in application. The frequent oversimplification of theory manifests, in part, as a growing trend in efforts to decompose the relative contributions of intersecting exposures such as race and socioeconomic status [15]. Aside from the uncertain utility of such findings in addressing social group disparities in health, these methods reflect an interpretation that is in many ways counter to the central claims of Intersectionality Theory—that the effects of such exposures can somehow be separated [16]. The relationship between epidemiologic research and social psychological theory is even more tenuous. Very few studies even consider the population-level health implications of internal identity processes, whose effects on health can in many ways be even more difficult to capture than the consequences of compounded external social processes such as racial, gender, and socioeconomic inequity.
To address the challenge of improving the utility of theory in understanding gender differences in health, I advocate for a conceptualization of social and psychosocial exposures that moves beyond “intersection” toward a “wholistic” identity approach. This approach emphasizes how the external social factors that shape health are experienced by individuals who not separately gendered, raced, or classed, but who each have a wholistic identity developed out of the unique social experience determined by these constructs which influences how external contexts are internally mediated and manifest in health. I argue that such an approach could circumvent the temptation of attempting to quantify the relative contributions of specific dimensions of oppression when far more integral to understanding social group health differences is characterizing the internal and external barriers and resources unique to different social groups. A wholistic identity approach not only aids in elucidating how the lived experience of one’s social status as determined by a unique combination of race, gender, etc., affects health, but would also allow for a more ethical and scientifically sound conduct of epidemiologic research if employed with greater frequency.
A question that often arises in epidemiologic research drawing from Intersectionality Theory is how the selection for study of any two identity categories, frequently gender and race, can be justified under the concept of inseparability of identity. In this chapter, I use gender and race as one example to explore the validity of a wholistic identity approach in epidemiologic research. Importantly, of the many designations which demarcate social groups in the U.S., there is strong evidence that gender and race exert a substantial, unique influence on health [14, 17, 18]. Despite the ongoing debate of whether race or socioeconomic status contributes more to poorer health outcomes among black persons in the USA [3], the social categories of gender and race share a number of factors not characteristic of other social constructs.
First, they are arguably two of the most visible and socially reinforced demographic traits. Whether approaching from an external social resource framework or an internal identity framework, the readily recognizable nature of race and gender means that individuals are more frequently subject to interpersonal discrimination based on these characteristics than other types of discrimination [18, 19, 20, 21, 22]. Such experiences can have far-reaching consequences for health, from chronic physiological dysregulation associated with toxic stress [22, 23] to receipt of subpar medical care [23] and increased barriers to protective social factors such as stable, safe housing or occupations [24]. With the structurally rooted, pervasive nature of racial and gender discrimination, the visibility of race and gender ultimately yields an overrepresentation of black persons and women among the poor and disadvantaged [3]. In this way, regardless of the magnitude of the effect of socioeconomic status on health, race and gender are determinants of socioeconomic status and therefore can be conceptualized as further upstream on the causal pathway from structural to health inequity.
Secondly, many social psychological and anthropological theories of race, as well as feminist theory, argue that cues for race and gender are more prevalent in the social environment than cues for any other social designation [19, 25, 26]. That is, more cultural elements, whether dress styles or styles of worship, are racialized and gendered than given any other social group categorization. In the context of hierarchical racial and gender structures, the prevalence of these constant reminders of what constitutes blackness and whiteness, or femininity and masculinity, renders race and gender particularly influential on how susceptible individuals are to the health consequences of their groups’ perceived inferiority or superiority [17, 18, 27, 28, 29].
As will be discussed further in the following section, the majority of theories rejecting biological determinism describe the central, causal role for structural inequity in the poorer health outcomes of racial and ethnic minorities and women [4, 10, 18, 20, 24]. Health outcomes can be neither ethically nor rigorously examined outside of the sociopolitical and sociocultural contexts in which the populations of interest are located. Arguably, in the U.S. as elsewhere, the long history of violence against racial and ethnic minorities and women is unapparelled in its pervasiveness and brutality [26, 30], violence executed with the express purpose of establishing and maintaining white and male supremacy [10, 26, 30, 31]. Given this history and the degree to which racial and gender violence became embedded within the structure of U.S. social institutions [10, 26, 30, 31], it can be reasonably inferred that race and gender will have a more measurable impact on the health outcomes attributed to such inequity than other social designations.
Throughout this chapter, I will use the increasingly popular term “gendered race”, therefore, to reinforce the need for a wholistic identity approach in epidemiologic research on health disparities. The term captures the concomitant elements of socially assigned gender and race categories that cannot be decomposed, neither within an individual’s self-concept nor in the manner which social inequities operate to structure privilege and marginalization based on these characteristics.
Far from being the first to advocate for the increased use of theory in epidemiologic research, the primary objective of this chapter is to argue for a wholistic identity approach that moves beyond concepts of intersecting social forces of oppression as determinants of health. Examining health disparities across gendered race groups through the rich perspectives emerging from the social science and social psychological disciplines, I contribute a novel interdisciplinary interpretation which underscores the need for considering both external social processes and internal identity processes in understanding and addressing the causes of gender differences in health. This chapter provides an overview of current evidence for gender differences in health which vary across race, outlining support for one wholistic identity framework, Identity Pathology theory, and its utility in the optimal execution of ethical epidemiologic research. The chapter concludes with recommendations for the inclusion of a wholistic identity approach in epidemiologic and statistical methods, as well as health intervention development.
It is important to note that the research explored in this chapter is based on cis-gender identities (gender identities which are consistent with sex assigned at birth), and do not address how gendered race operates in the lived experiences of trans or gender non-conforming individuals to impact on health.
The distinction between biologically and socially defined categories, while rarely considered theoretically or analytically in epidemiologic research, is integral to understanding how the wholistic effect of gender and race on health extend beyond the individual contributions of either construct. Sex, a biological category, influences physiological processes through the accumulation of hormones, gene expression, and reproduction determined by the presence or absence of the X chromosome. Gender, a sociocultural category, informs identity concepts, exposure to and appraisal of stressors, behaviors, and access to care—all factors whose physiological significance is also dependent on the external contexts in which identity is experienced.
As sex and gender are often conflated in health research [32], it is all the more difficult to tease out the individual contributions of each to specific patterns of health, disease, and mortality, particularly given their interdependent nature. For example, testosterone, a naturally produced hormone is present on average at higher concentrations in males [33], is associated with aggressive behavior. Culturally designated masculinity often reinforces aggression in males [31], leading to increased production of testosterone [33]. In this way, the interplay between sex and gender renders efforts to disentangle their individual effects on population-level health differences particularly challenging.
Despite the difficulty of distinguishing health outcome differences attributable to gender and sex, focusing on eliminating those differences that are unnecessary—and therefore unjust—can serve as a useful target for epidemiologic research. Because gender is a sociocultural construct, gender differences in health are also largely a function of the social meaning assigned to gender. These definitions carry value constructed by structural, institutionalized gender prejudice as well as cultural traditions that are heavily based in binary, hierarchical concepts of gender [19, 25]. The value assigned to gender is also dependent on other social designations such as race. In fact, perhaps contributing to persistent conflicting evidence on the magnitude and causes of gender differences in health is an assumption of consistency in gender effects on health across racial groups. Any efforts to clarify the causes of gender-related differences in health must necessarily engage the historical contexts in which these health-determining social designations are constructed. These analyses may yield additional, accessible intervention targets on gendered health disparities.
A vast store of sociological and anthropological literature describes the racial, gender, and economic inequity inherent to the hierarchical social structure of the United States (e.g. [10, 19, 25, 26, 34, 35, 36]), as well as the ways in which such social environments are inextricably linked with health [1, 6, 7, 37, 38]. Intersectionality Theory [10], Ecosocial Theory [2], and the Environmental Affordances model [39] specifically emphasize the compound effect of multiple forms of structured inequity intersecting to influence the disproportionate distribution of social, material, and natural resources across dominant status and marginalized populations. Social dominance theory [40] further suggests that structured inequity is supported through “legitimizing myths”, or consensually shared ideologies which position certain groups as beneficiaries of these health-impacting resources while also promoting narratives that influence the political practices which deprive other groups of access.
Social Identity [41] and Multidimensional Identity [11] theories exist in parallel with these frameworks, describing how the construction of social group identity, likewise informed by intersecting axes of structured oppression, designates advantage and disadvantage across social groups. Identity triggers, what the Jedi Public Health framework [42] terms the overt and covert cues embedded within the social environment which reinforce shared social ideologies, connect structural-level identity outputs with individual-level identity inputs. The Social Signal Transduction Theory of Depression [43] proposes specific ways in which these individual-level identity signals are transduced through psychoneuroendocrinological pathways that ultimately lead to disease. In this way, these frameworks each provide important but distinct elements of the larger machination by which structural inequity shapes the external social processes and internal identity processes that yield social group differences in health.
To truly engage these theories in a manner that is meaningful for researchers to understand the health significance of social hierarchies, the historical contexts which have defined concepts such as gender and race, and the ways in which these constructs become biology [38], must be carefully analyzed. Legal sanction of rape, physical assault, and other forms of wide-spread abusive behavior against women has deep historical roots in the U.S. as globally [18, 19, 30]. These practices are only one element of a social environment in which female persons have been subject to gender-based dehumanization so pervasive and persistent as to appear not only unavoidable but a product of nature [18, 19, 30].
Beyond sanctioning violence in ways that left little possibility for reprise or protection, legal disempowerment of women occurred in a variety of other ways. Among them include inheritance and land ownership prohibitions, and denial of voting rights. Historical analyses also reveal the ways in which the practice of medicine has been used to subjugate female persons [44, 45], not in the least by employing psychiatric diagnoses to discredit resistance to oppressive social and cultural norms [44, 46]. Decades of research have accumulated substantial evidence [10, 18, 30, 34] that like black persons, women’s exposure to violence, exploitation, and abuse by men while being simultaneously deprived of the physical, political, or legal means to defend themselves or prevent misogynistic violence has resulted in a greater propensity for appraising trauma through a lens of powerlessness.
The structural violence employed to enforce female subordination also conditions females to see violence committed against them as consequences of their own behaviors [19, 30], which can promote the learned helplessness that drives internalization. The widely practiced tradition of female denigration following experiences of gender-based violence increases the likelihood of females’ perceptions of their own complicity in traumatic experiences, and likely contributes to the increased vulnerability to internalization observed in this group [18, 19, 30]. The sense of helplessness fostered by a lack of social and legal repercussions for males’ physical and sexual aggression toward females, as well as pervasive denigrating responses to female victims of gender-based violence, has promoted internalization in a space where any outward expression of discontent might yield further abuse.
These experiences of gendered dehumanization carry compelling implications for gender differences in health. As has long been argued, there is strong evidence that socially reinforced gender hierarchies directly influence female susceptibility to internalizing psychopathologies like depression and post-traumatic stress disorder (PTSD) [18, 47]. Research highlights a key role for chronic exposure to negative circumstances, or “strain”, in women’s predisposition toward depressive symptoms [18, 19]. The source of this gender-specific strain is often identified in unique experiences associated with lack of social power as well as societal norms and expectations of women [18, 19]. Accordingly, the IP framework argues that the experience of being a female person in a male-dominated society [rather than solely inherent biological traits of the female sex], increases susceptibility to specific types of psychological and physical disorders associated with the physiological conditioning of subordinate status. Similar to the manner by which race becomes biology [38], so too, does gender become biology.
Growing literature on the role of inflammation in depression [48] supports this argument. The Social Signal Transduction Theory of Depression [43] offers a comprehensive framework for understanding the processes through which chronic stress associated with social identity threat can lead to depression. The framework outlines how inflammatory processes chronically triggered in response to social isolation, rejection, and marginalization stemming from subordinate social status can increase risk for several conditions, including rheumatoid arthritis, asthma, obesity, and depression. As a function of their subordinate social status, those who identify (and are identified) as female are therefore at increased risk for the identity threat which can cause sustained activation of the immune system’s inflammatory response. In accordance with this theory, women and black persons are consistently found to have higher levels of inflammation than men and white persons, respectively [49, 50]. These racial and gender disparities in inflammation may underlie the increased risk for conditions such as depression, which has been increasingly linked to chronic inflammation [43, 48, 49, 51], among women (see Table 1). In conjunction with increasing psychological susceptibility through socialized helplessness, socially constructed subordinance can thus also act physiologically to increase female vulnerability to disorders that may be better classified as internalizing symptomatology.
Biomarker | Black women | White women | Black men | White men |
---|---|---|---|---|
Systolic BP | 1.2 (0.6, 2.5) | 1.1 (0.6, 2.0) | 1.7 (1.1, 2.7)* | 1.4 (0.8, 2.5) |
Diastolic BP | 1.1 (0.6, 2.1) | 1.3 (0.8, 2.2) | 1.2 (0.8, 1.9) | 1.3 (0.8, 2.1) |
Pulse | 1.1 (0.7, 1.6) | 1.5 (1.1, 2.2)* | 1.2 (0.6, 2.4) | 1.8 (1.1, 2.9)* |
BMI | 0.8 (0.5, 1.2) | 1.1 (0.7, 1.7) | 1.1 (0.6, 2.0) | 0.9 (0.6, 1.3) |
Total cholesterol | 1.6 (1.0, 2.7)* | 1.1 (0.8, 1.5) | 1.0 (0.5, 2.0) | 0.8 (0.4, 1.3) |
HDL cholesterol | 1.2 (0.6, 2.3) | 1.1 (0.7, 1.7) | 1.7 (0.9, 3.4) | 1.3 (0.8, 1.9) |
Glyco-hemoglobin | 1.1 (0.8, 1.7) | 1.0 (0.6, 1.7) | 0.9 (0.5, 1.6) | 0.8 (0.5, 1.4) |
Serum Albumin | 0.9 (0.6, 1.3) | 1.0 (0.7, 1.6) | 1.7 (1.0, 2.9)* | 1.3 (0.7, 2.5) |
CRP | 0.8 (0.6, 1.1) | 1.7 (1.1, 2.6)* | 0.9 (0.5, 1.5) | 1.8 (1.1, 2.8)* |
High-risk ALd | 1.1 (0.6, 2.0) | 2.1 (1.5, 3.0)* | 1.7 (1.0, 2.9)* | 1.4 (0.8, 2.5) |
Adjusteda odds of depressionb with high-risk allostatic load and biomarker levels by gendered race in National Health and Nutrition Examination Survey 2005–2010, OR (95% CI)c.
Models adjusted for PIR (ratio of household income to the US poverty threshold), age, and all biomarkers.
PHQ-9 scores of ≥10.
Results are from four separate regression models. The reference category for the biomarkers in each model is “low-risk”.
AL scores of ≥4 were considered “high-risk”.*p <0.05
Abbreviations: BP, blood pressure; BMI, body mass index; HDL, high-density lipoprotein; CRP, c-reactive protein.
While the association between subordinate status and toxic stress is well-documented, less attention is devoted to the impact of higher-status on the experience of chronic strain. Still, previous research has identified stress correlates of perceived dominance, showing increased pituitary–adrenal responsiveness to psychological stressors in socially dominant males [52]. This limited evidence suggests that those in dominant positions can also experience higher levels of stress as a function of their status. However, chronic exposure to dominant-status stress likely acts to shape brain physiology and manifestations of identity-based trauma in ways distinct from the chronic stress generated by subordinate social status [53, 54, 55].
Where subordinate social status promotes internalizing disorders, dominant status promotes externalizing disorders characterized by antisocial behavior. Social dominance orientation (SDO) measures the degree of preference for inequality among social groups, a personality trait that negatively correlates with empathy, tolerance, and altruism [40], and promotes reduced activity in the brain regions associated with the ability to feel concern for the pain of others [53]. In studies measuring variation in SDO, both male and white persons were found to have significantly higher orientation, suggesting that white males are more likely than either female or black persons to both promote and subscribe to legitimizing myths (rape myths of victim culpability, for example) that enable justification of their dominance-reinforcing behavior [40]. Because high SDO also correlates with low empathy, it is likely that experiences of inequity among those whose race and gender are ranked as superior can yield a proclivity for antisocial behaviors. This propensity is manifest in gendered racial disparities in suicide risk, perpetration of rape, pedophilic child molestation, and mass violence, and risk for Anti-Social Personality disorder.
Intrinsic to the concept of intersection is the existence of distinction that two distinct elements, at some point, intersect. This is the basis on which Intersectionality Theory is built. As described, the structural institutions that distribute social resources do so along specific axes—inequitably, across races, genders, socioeconomic positions, abilities, sexual orientations, etc. Groups at the junctions of these axes are multiply advantaged or disadvantaged; disparities in health outcomes manifest at social intersections are, according to Intersectionality Theory, testament to the existence of a synergistic effect [10]. Internal identity processes that influence health in myriad ways, from stressor appraisal to behavior, have similarly been conceptualized in intersectional terms. The concept of dimensions outlined in Multidimensional identity theory also conjures an axial formulation of distinct identities. The intersection of these identities shapes how the external environment is experienced internally [11, 41], and subsequently, how social exposures impact on health.
A wholistic identity approach challenges the notion of both intersecting identities and intersecting axes of oppression. Intersectionality Theory calls attention to the locations where the distinct mechanisms of social hierarchies such as racism and patriarchy overlap to dictate social and health outcomes [10]. A wholistic identity approach instead argues that because racism is inherently gendered and sexism is inherently racialized, any effects of racism or sexism on health cannot be decomposed into distinct measurable units. The impact of either on the outcomes of individuals targeted by these systems therefore has less to do with the number of marginalized social group categories under which individuals fall and more so with the sociocultural paradigms unique to specific social groups which shape the internalization of, and response to, adverse social experiences. As such, while acknowledging the influence of social context and experience on the content and salience of specific identities, the argument put forth here is that individuals do not experience oppression in an axial fashion, but rather through a wholistic identity lens. That is, experiences of inequity are filtered simultaneously through each element of self-concept which predominates an individual’s identity in a manner with direct implications for how such experiences will impact on health. While perhaps appearing problematically theoretical, this concept of wholistic identity as a determinant of health can be readily applied to improve current understandings of gender differences in health.
One newly emerging wholistic identity approach is the Identity Pathology (IP) model, an infectious disease framework for the effects of structural inequity on health. The triad paradigm of disease causation which sits at the foundation of infectious disease epidemiology describes interactions between an environment, a host, and a pathogenic agent [56]. The IP framework incorporates the three elements of the infectious disease triad to conceptualize the health-impacting interaction between structural inequity, individuals subscribing to socially constructed identities, and pathogenic identity beliefs. Conceptualizing identity beliefs as a pathogen that spreads through social interaction over time in a contagious manner to cause specific disease patterns across socially defined groups is an innovative approach to characterizing the causal pathways from structural inequity to disease. Contagion modeling of social determinants of health has been useful in explaining and predicting the effects of other social exposures, such as gun violence [57]. The IP model goes beyond identifying the contagious nature of socially driven health outcomes to directly characterizing the fundamental infectious elements underlying the spread of pathogenic social exposures.
According to IP theory, structural inequity serves as a breeding ground for the multilevel processes which yield unequal health outcomes. Through the construction and hierarchical organization of race and gender, as well as the disproportionate distribution of social and material resources across these categories, the ubiquitous nature of structural inequity lends itself to the nourishment of belief systems and associated behaviors which produce population-level disease patterns. Transgenerational effects of trauma [58, 59] ensure that even prior to socialization, individuals are vulnerable to particular kinds of identity imprintation, making identity an ideal vector for pathogenic beliefs. Within an environment of structural inequity, what begins as an involuntary process of gendered racial socialization eventually leads to the development of identity paradigms capable of housing the pathogenic beliefs which infect and predispose individuals to various manifestations of pathology. The IP framework argues that the interconnectedness of social, psychological, neurological, and physiological processes renders every individual susceptible to the disruptive effects of identity on biological homeostasis. Whether through transgenerational epigenetic pathways [59], direct neurological pathways [43], or indirect behavioral pathways [60, 61], identity beliefs can chronically disrupt homeostasis and produce disease, a phenomenon which the framework terms
The IP model is distinct from Intersectionality theory in that it hypothesizes the concept of identity pathology, which describes a disease-prone state characterized by certain acquired beliefs about individual or group identity that are inherently pathological. Constructed in the context of structured inequities such as institutional gendered and classed racism, these identity beliefs are informed by unique experiences of individuals defined simultaneously by multiple social group designations and may partially account for the types of chronic diseases prevalent among different socially defined groups. The IP concept applies infectious disease modeling to the integration of the aforementioned theoretical frameworks in situating the adoption of socially constructed identities as a mediator of the disease patterns observed across different socially defined groups.
Extant epidemiological literature in accordance with an intersectional framework has identified gendered racial differences among black and white women and men in lung cancer treatment and mortality [12]; in the protective effects of income on depression [62]; in the association of depression with mortality [63]; and in the link between chronic stress and depression [64] among other exposure-health combinations. Yet, the results of these studies may also be viewed as evidence for the need of a wholistic identity approach.
The IP model builds on Intersectionality Theory in asserting that gendered racialization yields identity pathologies distinct to different gendered race groups, even among those not dually marginalized. Social hierarchies act to create unequal access to health-impacting resources, but it the convergence of each element of an individual’s wholistic identity that accounts for the unique manifestations of disease caused by identity pathology across different social groups. In this section, I present evidence for the concomitantly protective and harmful effects of these gendered race-specific identity pathologies that can partially explain patterns of disease observed across gendered race groups in the United States.
For the purposes of demonstrating the application of IP theory to the epidemiology of gendered racial health disparities, I use the example of the socially constructed identity which has been the focus of this chapter thus far, gendered race, among four groups who occupy different tiers within a historically grounded social hierarchy: U.S.-born black and white women and men. Taking a snapshot of the pathologies (which fit accepted notions of disease) endemic to each of these groups at middle age (45–55), we see that black women are more likely to be afflicted by cardiometabolic conditions such as obesity and uncontrolled hypertension than the other groups [65]; black men, prostate cancer (compared with white men) and cardiovascular disease [65, 66, 67]; white women, prescription opioid abuse and depressive symptomatology (MDD) [17, 68]; and white men, alcoholism and suicide [17, 69, 70]. The IP framework asserts that these disease patterns result directly from the ways in which each of these group experience identity pathology as dictated by their gendered race.
Most individuals are categorized as possessing at least one privileged and one marginalized identity. Queer or poor white men, for example, experience discordant social identities, as heteronormativity and classism rank these statuses as inferior [19, 71] even as their race and gender grant certain privileges. However, as previously noted, the immutable physical attributes assigned to gender and race lend a permanence and identifiability that make social processes particularly susceptible to discrimination based on these characteristics. Gendered racial identities are therefore particularly influential in shaping the manifestation of identity pathology.
As the theories covered in this chapter outline, female and black persons occupy subordinate social positions in the U.S. gendered racial hierarchy. Those who are both female and white, or male and black, however, occupy both subordinate (female and black) and dominant (white and male) positions and therefore can experience a particular kind of dissonance associated with simultaneous disempowerment and privilege. Because of this incongruence between the socially constructed racial and gender identities of white females and black males, these groups likely share underlying identity pathologies distinct from those of black women and white men. However, sociocultural influences as well as the influences of other centralized identities on coping can lead to distinct manifestations of identity pathology even among white women and black men.
Shared identity pathologies in which self-worth is predicated on an unattainable, but desired social status underlies prevalent diseases among white women and black men. The increased cardiovascular disease risk (as well as other chronic inflammatory diseases like prostate cancer) [72] in black men has been shown to correlate with John Henryism, a type of goal-striving stress caused by a refusal to succumb to racial or economic barriers to the practice of a socially defined masculinity among members of this group [73]. Similarly, the IP model asserts that white women’s increased risk for inflammatory-based internalizing disorders such as depression are caused by an increased likelihood of self-blame and denial of social inequity. As the social value granted by whiteness is diminished through gender marginalization, opioid addiction becomes a method of avoidant coping consistent with the socialized internalization of female persons.
In this manner, black men and white women can perceive similar barriers to the benefits of their advantaged social positions. For some black men, racism prevents the full practice of socialized concepts of masculinity, leading to social deprivation, identity threat, and the cognitions and health behaviors that increase risk for cardiovascular disease [27, 73]. Likewise, for some white women, gender discrimination impedes access to the full perceived benefits of whiteness, leading to social marginalization, identity threat, and the cognitions and health behaviors that predispose members of this group to inflammatory-based depressive disorders. These hypotheses are supported by emerging evidence of a link between cardiovascular disease and depression [48, 74, 75], making a case for the assertations that (a) black men and white women may share identity pathologies that manifest distinctly based on sociocultural contexts, and (b) ostensibly dissimilar symptoms of illness may stem from shared disease origins [49, 76].
The identity pathologies of white males and black females differ from those of black males and white females, and present with different symptomatology. White males occupy both racially and gender superordinate social positions, and are therefore more likely to be socialized to adopt identity paradigms which rely primarily on socially constructed relational self-worth. Without exposure to the subordinate status that conditions adoption of identity paradigms embedded with increased risk of internalization and chronic inflammation, white males are more likely to exhibit symptoms of recurrent identity stress through externalized control-reinforcing behaviors, which have been discussed at length. Subscribing to socially constructed white male identity paradigms not only increases susceptibility to antisocial tendencies attributable to pathologized whiteness, including lack of empathy, feelings of entitlement, and behaviors to reinforce feelings of control, but also externalizing disorders driven by pathogenic masculinity that manifest through violent or aggressive behavior toward self and others. As the practice of white male identity also requires the perpetuation of the structural violence that enables members of this group access to a disproportionate share of social and material resources, white males subscribing to these identity paradigms are also less susceptible to the physical disorders such as cardiovascular disease promoted by material deprivation.
On the other hand, dominant narratives of white and male identity which distance whiteness from poverty [71] ensure that certain groups of white men are particularly susceptible to the health consequences of identity pathology. With increased dependence on superior status for a sense of self-worth [17, 28], not being afforded the expected privileges of white male membership can exacerbate the negative health effects of poverty. Poor white men, for example, face increased risk of depression, and substance abuse may serve as a form of coping [17, 77] for those white men not succumbing to other self-destructive compulsions of identity pathology such as suicide [17, 77, 78].
In contrast, the dual occupancy of subordinate social positions may reduce the risk of psychopathology among black women, while conferring an increased risk for cardiometabolic disorder. As both female and non-white, their dually marginalized positions might predict that black female identity paradigms manifest a propensity for disorders such as depression as an expression of chronic stress. Identity pathology theory, however, contrasts the external social circumstances in which black women are situated with the internal resources characteristic of this group. The necessity for adapting to multi-faceted forces of structural violence may have enabled the development of psychological durability within black female identity paradigms that is protective against psychological symptoms of toxic stress. So, while occupying both racially and gender subordinate tiers might predict higher risk of psychological manifestations of depression among black women, the greater necessity for the development of effective coping strategies may actually act to confer psychological resilience and reduce risk in this group [64, 79].
Not permitted access to social privilege or higher social status as a result of their race or gender, evidence suggests that black women have been compelled to develop alternative standards of value in order to build self-worth. In this way deprived of access to sources of socially constructed self-esteem, black women subscribing to dominant black female identity paradigms are likely to appraise potential identity threats in a manner distinct from other groups. Specifically, acute, interpersonal experiences of identity threat may be perceived as less threatening. Previous research grounded in IP theory indicates, which will be later examined in more detail, that reported lifetime gender and racial discrimination in certain settings is associated with poorer cardiovascular health among black men, white women, and white men, but not black women (Table 2) [80].
Settingc | Black women | Black men | White women | White men |
---|---|---|---|---|
In public/on the street | +0.2 (0.0, +0.5)* | 0.0 (−0.3, +0.3) | +0.1 (−0.2, +0.5) | −0.5 (−1.0, −0.1)* |
Getting a job | 0.0 (−0.3, +0.3) | −0.3 (−0.6, 0.0)* | −0.6 (−1.3, +0.1) | −0.5 (−1.1, +0.1) |
Getting housing | −0.1 (−0.3, +0.2) | −0.2 (−0.5, +0.1) | −1.5 (−2.5, −0.4)* | −0.4 (−1.5, +0.7) |
At work | +0.1 (−0.2, +0.4) | −0.4 (−0.7, −0.1)* | −0.4 (−0.9, +0.1) | −1.0 (−1.6, −0.3)* |
At school | +0.3 (0.0, +0.6)* | −0.4 (−0.8, 0.0)* | −0.1 (−0.6, +0.5) | −0.3 (−1.1, +0.4) |
Receiving medical care | −0.5 (−0.9, −0.1)* | −0.7 (−0.9, −0.1)* | −1.5 (−3.8, +0.7) | −1.1 (−2.7, +0.5) |
By the police or courts | −0.1 (−0.2, +0.4) | −0.1 (−0.4, +0.2) | −1.1 (−2.0, −0.3)* | −0.3 (−0.9, +0.4) |
At home | +0.1 (−0.3, +0.4) | −0.1 (−0.6, +0.4) | −0.2 (−0.5, +0.1) | −0.2 (−0.7, +0.3) |
Adjusteda difference in cardiovascular health Scoreb at year 30 of the CARDIA study across settings of simultaneously reported racial and gender discrimination at year 7, ß (95% CI): 1992–2016.
All models are adjusted for age and study center.
Health scores are calculated based on data collected in year 30 or the last follow-up after year 7, using six components with a total possible 12 points: body mass index, total cholesterol, systolic blood pressure, fasting glucose, smoking status, and physical activity. Higher scores indicate better health.
At year 7, discrimination “at home” was excluded from the race or color scale; “by the police or courts” and “getting housing” were excluded from the gender scale.
p < 0.05
This psychological resilience among black women may be grounded in an ability to redefine standards of value in a manner that challenges the very notion of socially constructed subordinance. Contrary to what many psychological theories once predicted, members of stigmatized groups tend to have comparable levels of self-esteem with non-stigmatized groups [81]. Researchers attributed these surprising findings to the use of self-protecting mechanisms by members of stigmatized groups such as “selectively devaluing, or regarding as less important for their self-definition, those performance dimensions on which they or their group fare(s) poorly, and selectively valuing those dimensions on which they or their group excel(s)” [81]. Dominant sociocultural narratives rank black women at the bottom in most highly regarded social dimensions—physical beauty, intellectually capability, etc. [82], but celebrate their caregiving, selfless, mothering natures [83, 84]. However, rather than devaluing the dimensions in which society ranks them poorly as identity stigma predicts, many black women appear to have developed alternative social rating systems which do not predicate socially valued traits on dominant group standards [79, 82].
Furthermore, their professions, voting patterns, and activism demonstrate that black women have identified a source of self-worth inherent to the practice of caring for and about others [85]. In this way, by enabling a greater sense of self-efficacy in which black women feel capable of determining for themselves standards against which their value will be measured [82], multifaceted forces of disempowerment may confer individuals subscribing to dominant black female identity paradigms a measure of protection against the psychological manifestations of the very chronic identity threat they cause.
In support of this hypothesis, research demonstrates that allostatic load, a measure of cumulative physiological dysregulation stemming from chronic stress that precedes and correlates highly with many chronic diseases [86], is associated with depression among black men and white women, but not black women or white men (Table 3) [64]. Furthermore, there is indication that the underlying neurobiology of depression differs among black women compared with black men, white women, and white men (Table 1) [49, 87]. The depressive response to deprivation among black women, rather than being a function of a perceived threat to deeply held self-concepts that promotes sustained inflammation, as IP theory argues is more likely to be the case among black men and white women, may be based more in a situation-appropriate response to the uniquely disadvantaged social conditions in which black women are disproportionately situated. So, while the prevalence of depressive symptoms may be substantial among black women, these symptoms may be indicative of a response that is distinct from the pathology manifest in depressive symptoms among other groups. Evidence that adjusting for socioeconomic status eliminates the gender disparity in depression among black persons but not white [88] further supports this theory.
All ( | Black women ( | White women ( | Black men ( | White men ( | |
---|---|---|---|---|---|
Depression, % (SE) | 7.3 (0.5) | 14.6 (1.3) | 8.5 (0.7) | 7.1 (0.8) | 4.9 (0.6) |
Low ALb (0–3) | 6.1 (0.5) | 13.4 (1.4) | 6.9 (0.7) | 6.1 (0.9) | 4.3 (0.6) |
High AL (4–9) | 11.8 (1.2) | 17.1 (3.0) | 15.3 (1.9) | 10.1 (2.0) | 7.4 (1.5) |
Crude | 2.1 (1.6, 2.7)** | 1.3 (0.8, 2.2) | 2.4 (1.7, 3.4)** | 1.7 (1.0, 3.0)* | 1.8 (1.0, 3.0)* |
Adjustedc | 1.7 (1.3, 2.2)** | 1.1 (0.6, 2.0) | 2.1 (1.5, 3.0)** | 1.7 (1.0, 2.9)* | 1.4 (0.8, 2.5) |
Depression in relation to Allostatic load by gendered race Groupa among Black and white US adults: National Health and Nutrition Examination Survey, 2005–2010.
Results are from five separate logistic regression models; one for the total sample and one for each gendered race group.
Allostatic load, calculated as a composite of nine cardiovascular, metabolic, and immune biomarkers.
Adjusted for five age groups and five groups of ratio of household income to the US poverty threshold.
These potential psychological benefits do not come without physical costs, however. Where black women may be psychologically resilient, they are likely to be physically vulnerable; high rates of obesity, hypertension, and poor maternal/neonatal outcomes in this group reflect a unique adaptation to structural inequity—metabolically, rather than psychologically, exhibiting pathology. In addition to the structural racism and sexism that concentrates economic deprivation and limits the capacity for health-promoting behaviors within black female populations [10, 82, 85], black female identity paradigms demand what could be argued as a pathological minimization of self-care in efforts to be valued as caregiver [84, 89]. As Superwoman Schema theory suggests, in prioritizing the needs of others, black women often bear an extensive familial and community burden without complaint at the cost of their own emotional and physical needs [84]. Adherence to these gendered race-specific identity paradigms predisposes black women to automated coping such as emotional eating [90, 91], other risk-factors for obesity such as postpartum weight retention [92], and other health-impacting behaviors such as low health services utilization [93]. Furthermore, another form of identity pathology characterized by a failure to acknowledge the existence, or negative psychological impacts, of structural inequity can lead to denial and internalization which may lead to premature disease and mortality [29, 94].
Importantly, the IP framework does not assert that compounded inequities necessarily translates to greater likelihood of a specific disease outcome among multiply marginalized groups. Instead, the framework argues that the lived experience of race and gender in a society which advantages some groups in certain ways while disadvantaging others in different ways [12, 95] based on these identities yields variation in the efficacy of health-protective factors. This variation in turn manifests as a differential vulnerability to disease across gendered race groups.
Recently published work applies the IP framework to the study of gendered racial variation in the association of discrimination with cardiovascular health (CVH). This emerging body of research makes a compelling case for considering the role of wholistic identity in assessing the manner by which structural inequity contributes to unjust and unnecessary gender differences in health. Persistent gendered racial differences in the prevalence and severity of cardiovascular disease (CVD) in the U.S. highlight the necessity for a stronger theoretical foundation in understanding the role of discrimination in yielding social group disparities in CVD [21, 22, 80].
The age-adjusted likelihood of a CVD diagnosis is approximately equal for black and white men [65, 66], but black women are nearly twice as likely as white women in the same age group to develop CVD [65, 66]. Black women are also more likely than white women or black men to develop cardiometabolic precursors to CVD [96]. Among other risk factors [7, 10], researchers frequently attribute this increased risk among black women to a greater likelihood of experiencing racial and gender discrimination [12, 95]. Unlike the large gender disparity among whites, however, black women and men report comparable exposure to interpersonal gender and racial discrimination [21, 97] even as black men develop CVD at a faster rate than black women [65, 66].
Due to these prominent disparities in cardiovascular outcomes between black and white women and men, researchers have examined social group-specific exposures as potential contributors to these inequities [98]. Consistent with the dominant biomedical, individual-level orientation of epidemiological research [7], the literature has largely focused on interpersonal racial discrimination as a driver of poorer CVH within these groups [7, 22, 98, 99]. Often conceptualized as a proxy for structural discrimination, or, alternatively, as a mechanism through which structural discrimination acts on health, interpersonal discrimination provides an accessible method for investigating social determinants of health [7]. The underlying assumption for the majority of studies examining interpersonal discrimination appears to be that the stress associated with experiencing discriminatory interactions has a detrimental effect on CVH, directly through chronic activation of the stress response system, or indirectly through promoting poor health behaviors, which in turns increases risk for cardiovascular morbidity and mortality [7, 22, 100]. As such, populations more likely to encounter these experiences (e.g. women compared with men in the case of gender discrimination) will exhibit poorer health behaviors, experience higher rates of cardiometabolic dysfunction, and necessarily have a greater burden of disease.
In line with this reasoning, previous studies have linked reported racial discrimination to sedentary behavior, smoking, hypertension, obesity, and incident CVD within black and white populations [21, 100, 101, 102, 103]. Because the prevalence of reported interpersonal racial discrimination is substantially higher among black persons than whites [7, 23] these findings have generally been interpreted through the lens of differential exposure rather than vulnerability [16]. That is, a higher prevalence of disease theorized to correspond with a higher prevalence of exposure, rather than with differential vulnerability to the effects of exposure [7, 99]. Consequently, consensus has leaned toward an association of reported racial discrimination with the disproportionate rate of cardiovascular morbidity and mortality among blacks [7, 98, 99].
Admittedly, researchers have emphasized relevant differences in the effects of exposure depending on the basis of discrimination [98, 102] (racial versus weight, for example), the frequency of discrimination [98], demographic characteristics such as the age or gender of the individual to whom the discrimination is directed [103], and how individuals respond to stress [21, 104]. Even still, few have theoretically considered the nature of these differences and whether the reasons for these differences have implications for the exposure-disease relationship; even fewer have taken these potential implications into account during analysis.
Further, while the consequences of structural and interpersonal discrimination are documented more frequently among women [20, 95], recent evidence showing no association of reported gender discrimination with incident CVD [21], along with other recent findings inconsistent with previous evidence [94], calls into question unidimensional conceptualizations of discrimination as a cause of poorer CVH. A focus on differential exposure to interpersonal discrimination as underlying gendered racial disparities in CVH may prevent identification of other relevant group-specific characteristics such as varying
Previous findings also suggest that the magnitude of stress discriminatory experiences cause and whether responses to these experiences exacerbate or reduce the risk of CVD depends on the context in which they occur [100, 104, 106]. Therefore, in addition to the challenge of capturing variation in the subjective identity characteristics that might render interpersonal discrimination detrimental to CVH, as well as the complex psychological processes by which individuals attribute discriminatory experiences, it is also necessary to consider how the setting in which discrimination is reported reflects access to both internal and external psychosocial resources that may independently relate to CVH differently for different gendered race groups. Everyday experiences of discriminatory treatment not only encompass individual acts but also the complex relation of acts that will be specific to specific social contexts, as argued by some critical race theorists [12]. The particular relationship between individual and context bears important implications for the physiological impact of perceived discriminatory interactions.
Further, the context of reported discrimination, such as at school, at work, by the police or courts, or while seeking healthcare, may provide insight into distinct effect pathways operating among different gendered race groups. While discrimination may act directly on CVH through repeated activation of the stress response system for some, others may be more susceptible to the indirect effects of interpersonal discrimination such as barriers to quality health care [98, 100, 108].
The complex relationships of these psychosocial exposures with CVD among black and white women and men connoted in the literature point to a need for further consideration of how and in whom discrimination operates to affect risk for disease [7]. Evidence suggests that the multifaceted nature of the interpersonal discrimination experience operates within distinct social groups to differentially influence CVH in a manner not frequently captured in epidemiologic studies [22, 98, 99, 103]. Inconsistencies in the literature may be attributable, in part, to an inadequate conceptualization, measurement, and analysis of interpersonal discrimination in relation to CVH across demographically diverse populations.
The Identity Pathology framework provides a useful model for investigating these inconsistencies in the relationship of discrimination with CVD (see Figure 1). While not solely applicable to CVD, the model is useful for clarifying inconsistencies in the literature on interpersonal discrimination and CVD because it specifies the conditions under which—and in whom—reported experiences of interpersonal discrimination will be measured as damaging to CVH and lead to the development of disease. As applied to CVD disparities and interpersonal discrimination, the model makes three central assertations.
Application of the emerging identity pathology framework to describe potential pathways from intersecting axes of structured racism and sexism to cardiovascular disease.
First, that in order to more accurately capture the effects of interpersonal discrimination on cardiovascular health and health disparities, multiple aspects of the discrimination experience must be considered in the design, analysis, and interpretation of health-related studies. Secondly, the IP framework posits that experiences of interpersonal discrimination are fundamentally based in historically structured inequities that impact on each dimension of the discrimination process in health-relevant ways. Finally, the model purports that the precision with which reported experiences map onto perceptions and intentionally or implicitly driven acts of discrimination depend on a variety of psychosocial characteristics, one of the most important of which is an individual’s beliefs about their gendered racial identity. In other words, the contribution of discrimination to disparities in CVH may extend beyond gendered racial variation in
The IP model argues that this variability in effect across gendered race groups can be attributed to differing manifestations of identity pathology. Due to the relationship between identity pathology and the experience of interpersonal discrimination, the experience being captured in reported discrimination among different gendered race groups must necessarily be different. For men reporting frequent experiences of gender discrimination, these experiences are less likely to reflect objective encounters with discrimination as traditionally conceptualized and are more likely to signify that these men feel they are being deprived of the entitlements they believe they are due as a result of their manhood. Similarly, reporting of multiple encounters with racial discrimination by white persons likely indicates encounters in which these individuals believe they were deprived of entitlements due to them as white persons. Regardless of the accuracy of their reporting, the perception of what members of dominant status groups consider discrimination can be stressful enough to have a measurable impact on their cardiovascular health. This effect may be exacerbated by their recognizing the inconsistencies of their perceptions with the way that society defines experiences of discrimination.
Moreover, even among those whom the occurrence, perception, and reporting of discrimination overlap with high accuracy, differences in beliefs about the significance of being perceived and treated as inferior by another group will influence the stressfulness of perceiving discrimination. Finally, identity beliefs associated with gendered race also shape how individuals will cope with the reality of being perceived and treated as inferior, thereby creating another source of variability in the effect of reported interpersonal discrimination on CVH. Because increased exposure to social stressors among marginalized groups may yield an array of adaptive coping strategies that are protective against the health consequences of psychosocial adversity, the IP model predicts, perhaps counterintuitively, that the association between reports of racial and gender discrimination and declining CVH to be stronger among members of dominant status groups. The IP framework also posits that the susceptibility to direct versus indirect effects of discrimination on CVH are primarily a function of an individual’s cumulative social experiences and will therefore manifest differentially across gendered race groups.
Given these hypotheses, two studies [29, 80] examined the relationship of reported interpersonal discrimination with CVH among black and white women and men using 30 years of longitudinal data from the Coronary Artery Risk Development in Young Adults study. The first study evaluated whether the associations of reported interpersonal experiences of racial and gender discrimination simultaneously compared with racial or gender discrimination alone, or no discrimination, with cardiovascular health 23 years later was stronger among white men than other groups. The second study explored variation in the relationship between simultaneously reported racial and gender discrimination and future CVH across eight social settings.
The studies identified important characteristics of the relationships between reported racial and gender discrimination and cardiovascular health (CVH) in black and white women and men. The first study identified differences in the associations between reported gender and racial discrimination and CVH, suggesting differential vulnerability (Table 4). Compared with reporting no discrimination, reporting any racial discrimination predicted higher CVH scores among black women, while no statistically significant associations were found among black men. Among white women, reporting any gender discrimination predicted higher CVH scores than reporting no discrimination. For white men, predicted CVH scores were higher for those reporting any racial discrimination, and lower for those reporting racial and gender discrimination in at least two settings, than in those reporting no discrimination.
Black women | Black men | White women | White men | |
---|---|---|---|---|
Discrimination (year 7) | ß (95% CI) | ß (95% CI) | ß (95% CI) | ß (95% CI) |
None | ref. | ref. | ref. | ref. |
Any racial only | 0.4 (0.0, 0.8)* | −0.1 (−0.5, 0.4) | −0.3 (−1.2, 0.6) | 0.4 (0.1, 0.8)* |
Any gender only | −0.3 (−0.8, 0.2) | 0.2 (−0.6, 1.0) | 0.3 (0.0, 0.6)* | 0.0 (−0.4, 0.3) |
Any racial or gender, in <2 settings | 0.1 (−0.3, 0.5) | 0.0 (−0.5, 0.5) | 0.2 (−0.2, 0.6) | −0.2 (−0.6, 0.1)* |
Both racial and gender, in ≥2 settings | 0.2 (−0.1, 0.6) | −0.3 (−0.7, 0.1) | 0.0 (−0.4, 0.4) | −0.6 (−1.1, −0.1) |
Adjusted difference in cardiovascular health Scorea for categories of reported racial and/or gender discrimination by gendered Raceb: CARDIA, 1992–2016.
Cardiovascular health scores are calculated based on data collected in year 30 or the last follow-up using six components: body mass index, total cholesterol, systolic blood pressure, fasting glucose, smoking status, and physical activity. Higher scores indicate better health.
Models are adjusted for age and geographic location.
*p < 0.05.
These findings contrasted with those describing a link between racial discrimination and poorer cardiovascular health among black persons [7, 99, 101]. Though inconsistent, the literature has demonstrated associations of reported racial discrimination with CVD risk factors including diet, hypertension, smoking, sedentary behavior, obesity, and inflammation [50, 101, 103, 109], as well as social predictors of CVD such as marital status, socioeconomic position, and education, in both black women and men [7, 23]. In this study, we did not find a statistically significant association between racial discrimination and poorer CVH within these groups. Other cross-sectional analyses [100, 110] and the only study prospectively examining the relationships of racial discrimination with incident CVD exclusively among black women and men have also failed to find a connection [94]. Taken together, these findings offer evidence that traditionally accepted risk factors may be poorer predictors of CVD among black persons. Accordingly, while interpersonal racial discrimination may increase the likelihood that black women and men develop cardiometabolic risk factors for CVD, other factors integral to the experience of multiply marginalized identities may have a much more substantial impact on the development of CVD in these groups. As these other potential risk factors remain under studied [7, 95], the long history of investigating interpersonal discrimination as a cause of poorer health has done little to expand an understanding of CVD disparities between black and white women and men.
In addition to suggesting alternative causes of higher CVD morbidity and mortality among marginalized groups, the IP model theorizes that discrepancies between the occurrence, perception, and reporting of interpersonal discrimination contribute to the observed variability in the associations of reported racial and gender discrimination with CVH among black and white women and men (see Figure 1). The model suggests that for some gendered race groups in certain places and settings, reported discrimination is more likely to reflect interactions that meet objective standards of inequitable treatment. In these cases, acknowledging experiences that actually occur may be beneficial for health, while denying may lead to increased stress and stress-related pathology regardless of one’s gendered race group [50, 111]. From building social networks based on shared experiences to enabling the development of healthier coping behaviors [27, 109], recognizing and acknowledging the discrimination one encounters may allow for chronic stress relief that reduces risk for CVD associated with discrimination exposure [50, 111]. Reported experiences of racial and gender discrimination may thus be measured as protective among those against whom such experiences actually occur.
To fully account for the results of this study in the context of IP theory, it is important to note that across the four gendered race groups, reporting or not reporting exposure likely signify different health-relevant psychological and emotional states [27, 112]. The relatively low percentage of black women who reported experiencing no racial or gender discrimination did so despite a considerable body of evidence to the contrary, indicating a measure of denial or “tough it out” mentality in this group [27] distinct from the evidence-based reasons that a much greater proportion of white men would report no exposure. Even within gendered race groups, the meaning of reported exposure to discrimination may vary. As proposed in the IP framework, white men reporting few experiences of racial discrimination may subscribe to identity paradigms distinct from those in their group reporting both racial and gender discrimination in multiple settings. The framework posits that among white persons, reported experiences of racial discrimination in only one setting (e.g. at school) may be more likely to meet objective standards of discriminatory treatment. Accordingly, better CVH scores among white men who reported only racial discrimination would not be inconsistent with a protective effect of reporting interpersonal experiences of discrimination that meet objective measures. That is, white men who reported only exposure to racial discrimination were likely the white men for whom the overlap of the occurrence, perception, and reporting of discrimination was relatively accurate. As the IP model predicts, in such cases, there is likelihood that reported discrimination will be measured as protective of CVH. That the positive effect on CVH among white men reporting only racial discrimination persisted even after adjusting for SES further supports this assertation.
Study 2 revealed that simultaneously reported racial and gender discrimination were differentially associated with CVH depending on gendered race and setting (Table 2). Among black women, with one exception, reported instances of interpersonal discrimination were not associated with CVH or were associated with a higher CVH score while the opposite findings were observed among the three other gendered race groups. For black men, simultaneously reported discrimination in four of the eight settings was significantly associated with poorer CVH. Associations across settings also differed between white women and men. For white women, reported racial discrimination by the police or courts or while seeking housing was associated with lower CVH scores, while among white men, self-reports of racial and gender discrimination in public or at work were associated with a lower CVH score. For all groups, reporting discriminatory experiences while receiving medical care had a negative impact on future CVH, although effect estimates did not reach statistical significance among white women and men.
That the settings in which reported racial and gender discrimination were associated with poorer CVH differed among black and white women and men is consistent with disparate effect pathways for these groups that may be linked to gendered race-specific external and internal characteristics. The findings suggest that for black women, interpersonal experiences of discrimination are more likely to act indirectly on CVH by deterring access to health-influencing resources such as medical care, a mechanism that has been demonstrated in previous research [113]. Black women who reported racial and gender discrimination while receiving medical care were the only individuals of their gendered race group to experience a decline in CVH associated with reported discrimination; reported exposure in other settings was measured as either protective or had no influence on CVH. Rather than yielding a greater vulnerability to the negative health consequences of psychosocial stress as might be intuitively concluded, these findings suggest that black women may more readily adapt to hostile social environments such that the effects of recurrent interpersonal discrimination on the stress response system [64], or on certain health-related behaviors that preempt cardiovascular disease [103], are minimized in comparison to other gendered race groups. These results do not suggest that black women are immune to the physiological impacts of the discrimination they report. Rather, these findings indicate that structural barriers, such as reduced access to high-quality medical care, may have a much more compelling effect on the cardiovascular health of black women than stress stemming from encounters with interpersonal discrimination, as has been previously argued [4, 98].
The settings in which reported discrimination impacted CVH among black men in this study indicate that members of this group may be more susceptible to the direct physiological impact of perceived subordinate status than black women. This may be because racism targeted at black men has historically been more ostensibly violent [97], or due to other psychosocial and cultural factors influencing the distinct coping methods of these groups [10, 64, 97]. The observed patterns in the associations of reported discrimination with CVH indicate that reminders of marginalized status may be experienced as more stressful among black men than black women and therefore may be more likely to act on CVH through direct physiological mechanisms in addition to creating barriers to health and social resources in this group.
One explanation for the patterns observed in this study is that interpersonal discrimination may act as an “identity trigger” consistent with claims of the Jedi Public Health framework [42]. The authors suggest that identity triggers, or elements of the social environment that trigger awareness of one’s social status, are one mechanism through which structured inequities act to differentially impact on health and lead to health disparities. The unequal social conditions in which black and white women and men are situated influence the type and saturation of identity triggers each of these groups will encounter, as well as available coping resources [39, 111], within and across various social settings [42]. According to this framework, experiences of discrimination pose a setting-specific disease risk for each gendered race group. We suggest further that perceived experiences of interpersonal discrimination can act as identity cues, even in the absence of actual occurrences of discrimination, which might partially explain the associations we found among white women and men. Identity triggers and the perceived coping resources [39] particular to black and white women and men may act to specify conditions under which experiences of interpersonal discrimination will have a measurable impact on CVH.
Hierarchical social conditions create power dynamics between marginalized and dominant status groups which influence how inequity will be experienced on a personal basis by members of both types of groups [7, 10, 97, 114]. Experiences of discrimination based on gendered race that occur in the context of medical care, education, or in interactions with law enforcement, for example, can bring to bear historically structured power imbalances through heightened awareness of one’s stigmatized status in the form of race consciousness [99, 115]. Instances of interpersonal discrimination in these specific settings may be uniquely stressful for marginalized persons both because of the likelihood of recurrence and a perceived lack of opportunities for retribution [39, 42, 111].
On the other hand, the settings in which awareness of unequal social status might be triggered among dominant group members—whether or not a discriminatory interaction actually occurred—and the resources they believe are available for coping with the accompanying stress, likely differ. These perceptions of social status triggered by interpersonal discrimination lead to between-group differences in the types of social contexts in which experiencing discrimination will contribute to deteriorated CVH. This interplay is consistent with our findings that although a higher percentage of black men reported encountering discriminatory treatment in public or on the street than in any other setting, this setting was the only one in which exposure was not associated with poorer CVH within this group. In contrast, “in public or on the street” was one of the two settings in which white men who reported experiencing racial and gender discrimination experienced declining CVH. Given the historical contexts in which white men’s social status afforded a measure of public and occupational deference, for some white men instances when this deference is absent or challenged in settings such as on the street or at work may be more likely to be perceived as discriminatory and more stressful than encounters perceived as discriminatory in other settings, an explanation that is consistent with the findings of this study.
Despite the detailed theoretical focus of this chapter, a wholistic identity approach to epidemiologic research, of which the IP framework is one example, has practical application for clarifying gender-related differences in health. One of the most significant assertions of the IP framework is that epidemiologic research should embrace a more nuanced approach to social determinants of health and health disparities research, specifically as related to assumptions of homogeneity in social group differences in health. This paper has presented strong evidence that concepts of gender and race are conceptually far more complex than is often operationalized in many epidemiologic analyses. Furthermore, the health implications of adverse social experiences associated with gender and race are heavily dependent on psychosocial characteristics that are rarely measured in epidemiologic studies.
The inclusion of sound theoretical foundations is necessary to ethically and rigorously address these concerns. The IP framework calls for reconsidering some standard methodologies of epidemiologic research. Because the white male referent presents a number of conceptual problems, using stratified analyses can circumvent many of the biases to which research questions based on multi-gender, multi-racial, or multi-ethnic samples are vulnerable. Stratified analyses can also avoid the pitfall of including variables for complex social constructs such as gender or race in regression models, as recent literature has described notable limitations and conceptual inconsistencies in this approach [15, 16].
In addition to implications for improving the rigor of scientific research, the increased application of well-developed theory to research into the causes of social group differences in health has ethical implications as well. Outside of the academic settings in which health research frequently occurs, epidemiologic findings have significant impact of the health and lives of real people. What we discover about the causes of gender differences in health informs the policies and societal changes intended to alleviate unnecessary and unjust suffering. A failure to fully consider all available evidence is a failure to meet the lofty ideals of epidemiology as a discipline—to identity the causes of disease in order to eradicate.
In this chapter, I have addressed the necessity and challenge of incorporating sound theory into epidemiologic research on the causes of gender differences in health. Intersectionality Theory has in many ways served as a springboard for the growing collaboration of epidemiology with social science. Still, although the use of interdisciplinary theory in epidemiologic research has increased substantially within the last decade, there is much room for improving the application of theory to everything from developing research questions to the selection of confounders to the interpretation of results. Moreover, much of the research employing an intersectional approach struggles to deeply engage the health implications of concepts like socially constructed gendered race. While there is acknowledgement of the external social processes which shape the health of groups in different socially defined categories, little attention is given to how internal identity processes also play a pivotal role in determining health. This oversight is largely due to a resistance within the field of epidemiology to grapple with complex social psychological phenomena such as the influence of social group identity on population-level differences in health.
For this reason, I have argued in this chapter for the necessity of moving beyond intersectional approaches to health disparities research. The use of a wholistic identity approach to understanding social group differences in health requires the engagement of wide array theories which each provide important but distinct elements of the larger mechanisms by which structural inequity produces social group differences in health. One wholistic identity theory, the Identity Pathology model, is built on such an interdisciplinary conceptualization of health disparities.
According to Identity Pathology theory, embedded in socially constructed identities are beliefs that moderate whether and how exposure to chronic adverse social conditions, for example experiences of interpersonal discrimination, will generate disease. When individuals are socialized with identities built on pathogenic identity beliefs, they are more susceptible to a number of physical and mental illnesses. Pathologized identities act to foster disease through dictating cognitive and behavioral practices—stressor appraisal, health behaviors, etc.—that yield distinct pathologies in the context of unequal social conditions. The IP framework argues that gendered racial identities constructed in the context of inequitable social conditions create unique manifestations of health and disease among black and white women and men, contributing to gender differences in health that will vary across race in a manner that may not be adequately captured in current interpretations of Intersectionality Theory.
Fundamentally, many theories on social determinants of health, including Intersectionality Theory, predicate the health of the socially marginalized—whether that be on the basis of gendered race, socioeconomic status, etc.—on a set of resources of which they are systematically deprived. In some ways, these theories carry undercurrents of an adversarial tone by situating the “disadvantaged” as those who have everything to gain from social change against the “privileged” who are at risk for a corresponding loss. As such, any improvements in the health of members of marginalized groups are necessarily dependent on the decisions of those who retain power over the distribution of these resources, individuals who have little incentive to relinquish their positions of authority (perceived and actual) or enact more inclusive policies [28].
In
If structural inequities and the unequal health outcomes such conditions cause are to be truly deconstructed, intervention must entail more than efforts to change social and economic policies which were intentionally established to ensure that power and resources remain under the control of white men [10, 26, 28, 34]. The persistence of documented health disparities over the last century despite long-standing calls for social, economic, and political reform as well as substantial advances in our understanding of the role of social determinants in health indicates, as the IP framework theorizes, that these policies and the decision-makers behind them are resistant to change. Reservoirs of infection, source populations which stubbornly harbor pathogenic identity beliefs even as changing discourse variably decreases or increases the acceptability of social prejudice, ensure that interventions focusing only on shifting policy will do little to yield lasting social equity.
In light of these observations, the IP framework suggests that because pathogenic identity beliefs perpetuate the pathogenic social environments in which they flourish, interventions must target the environment, agent, and host simultaneously. Eradicating health disparities therefore requires an additional approach that acts in conjunction with efforts to deconstruct problematic institutions and policies, and efforts to create identity-safe cultures. In the case of identity pathology, environmental interventions, which have been well-described in extant theory [1, 37], involve abolishing the policies and practices which maintain and promote inequity within social institutions and the inequitable distribution of health-impacting resources. Agent interventions require shifting the cultural and social norms in which pathogenic beliefs flourish and are transmitted, as proposed by the Jedi Public Health Framework [42]. Host interventions, which the IP framework newly proposes, target the identity beliefs which make individuals particularly susceptible to the effects of inequitable social conditions on the cognitions and behaviors that directly and indirectly influence their own health as well as the health of others.
Although the IP framework uses the example of race and gender hierarchy among black and white women and men, application of the framework extends well beyond these particular groups and examples of structural inequity. As the objective of the framework is to highlight the substantial role of identity processes in health outcomes, the principles of the IP framework can be adapted to describe the effects of any inequitable social contexts on the physical and psychological well-being of any populations exposed to those contexts. The IP framework may be particularly useful for examining the understudied health impacts of structural inequity among groups such as those with varying physical abilities or native populations whose suffering has been systematically made invisible.
The framework is densely theoretical and draws from a number of disciplines in outlining complex mechanisms from structural inequities to health inequities. Despite its ambitious reach, the core concepts of the framework are readily applicable to health research. Through suggesting adjustments to analytic methods, outlining testable causal mechanisms, and proposing an evidence-based intervention, the IP model orients health researchers toward another channel for more ethical and rigorous investigation the causes of and solutions to unjust gender disparities in health.
Soils are formed by the joint action of climatic factors, weather, relief, source material, and organisms. Source materials consist of rocks or other soils, under which the other factors work. Thus, the properties of a residual soil and the behavior it presents in the face of various requests will largely be determined by the rock or material from which it originated.
In tropical and intertropical regions, a diversity of climates and relief is observed, resulting in a very large variety of soils known as tropical.
Brazil, for its large size (more than 8 million square kilometers), presents geological, climatic, and relief diversity that has conditioned the formation of soils with various behaviors.
In general, the significant climatic factors for soil formation are mean precipitation and temperature, which condition the rates of chemical reactions, the rate of change of rocks as well as the mobility of elements along the profile. Formed from the leaching of bases and the concentration of oxides and iron and aluminum sesquioxides in this pedological evolution, we have the lateritic soils, which have properties differentiated from the soils formed in temperate climate.
Thus, considering the wide distribution of tropical climate in the world and its occurrence in much of the Brazilian territory, aspects on the genesis, importance, and properties of tropical soils in the country will be addressed in this chapter.
The definition of tropical soil varies from region to region [1], but in general they are defined as those that occur in places that have tropical and humid climates.
The tropics are regions of the Earth located approximately in the middle of the globe between the latitude lines of the Tropic of Cancer and the Tropic of Capricorn and include the Ecuador line and parts of North America, South America, Africa, Asia, and Australia; tropical regions are home to about one-third of the world’s population and account for 36% of the land mass.
Intemperism in the tropics can reach tens of meters below the surface, and the products of this process are complex and are not only of interest to geotechnical engineers; they are of great interest to other researchers [2]. It is possible to say that tropical soils are rather intemperated soils rich in iron oxides and aluminum; however, not all tropical soils can be included in this category, since they can originate from materials such as volcanic gray or form in regions of desert climate and thus exhibit different characteristics of the indicated [3].
In this sense, Brazil has 92% of Brazil’s territory located in the Tropical or Intertropical Climate Zone, the remaining 8% are south of the Tropic of Capricorn and are inserted in the Temperate Climate Zone of the Southern Hemisphere. (Figure 1) in which the climate Aw is observed (the tropical savanna climate features distinct wet and dry seasons of relatively equal duration). Most of the region’s annual rainfall is experienced during the wet season, and very little precipitation falls during the dry season [5, 6].
Climate map of South America [
The tropical climatic conditions are constituted by rains concentrated in November and March and a dry period that goes from April to October with haste in general inferior to 60 mm in the dry periods. In the large area of central Brazil [5], Aw climate is markedly seasonal, with strong longitudinal gradient (east-west) of annual rainfall from 1,300 to 1,900 mm and an opposite gradient (west-east) in the rainfall seasonality.
The conditions found in the regions of wet tropical climate produce, in great part, peculiarities of the Brazilian grounds (incident, constitution, formation, properties, rates, and environmental conditions), which are different from the considered ones in climate regions seasoned for which there were developed the systems of classification of traditional grounds [7].
The term laterita was used initially by Francis Buchanan in 1807 when, in travel to the west of India, he identified the use of a reddish ground that after drying was used like bricks in constructions of several sizes; the term laterita, however, includes a scale bigger of materials and of behavior varied [8]. However, it is known that the laterita was already used like building materials before that and his importance attached for the production of foods and of construction in function of the vast area of incident in the world, they are studied by several authors around the world as in Brazil, Africa, India, Australia, and other places [9].
The laterização is a process that makes part of the evolution of the relief [10] and [11] in which it takes place to lixiviation of alkaline ones, magnesium, and partially of the quartz and the consequent layers, the formation of lateritas, what are the mixture of hydroxides of iron and aluminum in varying proportions plus add up titania and other residue left. They can constitute micro-collected or collected cement of few centimeters of diameter in the womb of the soil [12].
Depending on the degree of laterization, the materials can be presented under several forms of texturais what go from not consolidated soft clays that can be broken under pressure of the fingers up to materials having enough edurecidos. That led to the use in the concepts literature empiricos of degree of hardness as “hard“ or “soft” [8, 13]. However, these expressions guard little relation with mechanical properties of interest of the engineering. Since the variety of lateritas and the changes in his conditions due to environmental factors, his agreement to classifications that use purely morphological concepts, will not always be possible [14].
Another aspect of the formation of these grounds is that the lixiviation of the bases and of the sílica, nevertheless, can be incomplete and the distinction between two types of grounds is difficult to be done; in spite of the properties of two types of grounds, it is similar in terms of properties for the engineering [15].
As for the time of formation of the grounds, lateríticos appreciate that takes place in nearly 104 years, but there are evidences of which this formation is quicker in rocks with less content of quartz like basaltos in granites or rich sediments in quartz [16, 17].
Figure 2 illustrates the process of formation of the tropical grounds and the denominations used for the same.
Terms used in the description of tropical soils [
As noted, the materials classified as lateritic owe their mechanical and hydraulic behavior to this process of “laterization” that promotes the leaching of basic cations and concentration of iron oxides and aluminum and additionally the predominance of clay minerals of the group of caulinites, low CTC. Studies have shown that soils formed under similar conditions tend to exhibit similar indices and engineering properties [19].
It is noted that Pedology, science that originated in the countries of the northern hemisphere, where soil formation processes are delayed due to cold winter or dry summers, meets challenges for soil description and classification in the tropics, including the difficulties of distinguishing soil from source material and the different horizons resulting from the intense pedogenetic processes of the tropical climate [10].
Lateritic soils (later Latin: brick) are shallow soils, typical of well-drained regions of the tropical wet regions, and have peculiar characteristics associated with the laterization process being the most important from the technological point of view, soil enrichment of iron- and/or aluminum-hydrated oxides, and the permanence of kaolinite as predominant and almost always exclusive clay. These minerals give the soils a typical color: red, yellow, brown, and orange [7, 15].
The saprolitic soils (sapro, Greek: rotten) are those resulting from the decomposition and/or
Saprolitic soils form layers underlying the layer of lateritic surface soil (or possibly other soil) generally appearing on the surface of the soil due to soil erosion or excavation due to man-made works. These soils are more heterogeneous and consist of a complex mineralogy containing minerals still in decomposition phase.
The characterization and evaluation of the geotechnical properties of residual soils are a complex subject, and there is the need for studies on their peculiar behavior for different purposes such as foundation, roads, stability of taludes, construction of earthworks, among others.
Figure 3 illustrates some variations that can be found in the intemperism profile of tropical soils and that contribute to the complexity of the approach, and Figure 4 shows concretions formed by this material.
Alteration profiles of tropical soils [
Distinct mesoscopic aspects of the lateritic materials at the Rondon do Pará bauxite deposit. A. Contact between Belterra clay and Nodular Bauxite; B. massive bauxite; C. fragments of iron crust with hematite; D. ferruginous bauxite with oxyhydroxide clasts in a gibbsite matrix, strong goethitized; E: massive bauxite base with kaolinite; F. mottled zone in the basal clay. Approximate scale, drillcore HQ diameter of 9.65 cm (3.5″).
Field investigations of residual soils often relate to heterogeneous soil profiles vertically and horizontally, great structural complexity, and expected metastability due to the process of leaching and chemical decomposition, the presence of rock blocks immersed in matrix, among other aspects [21].
Despite the difficulties of naming these soils, there is a relative consensus that their characterization is made by conventional criterion, which is chemical, that is, would be lateritic soils all those in which the silica/sesquioxides ratio is greater than or equal to 2, and it is deeply weathered soil [22].
Despite the conventional definition, it is found in many situations that the behavior of these soils cannot necessarily be addressed by the conventional geotechnical project due to one or more of the following reasons [21]:
Soil state is variable due to complex geological conditions.
Classical constitutive models do not offer an approximation of their true nature.
These formations are difficult for sample and the soil structure cannot be reproduced in the laboratory. As a consequence, mechanical behavior and geotechnical properties should be evaluated directly from
There is also a limited experience collected and reported and the finding that parameter values are outside the most commonly found ranges for sand and clay formations of sedimentary soils.
Deposits are often unsaturated and the role of matrix suction and its effect on soil permeability and shear resistance must be recognized and accounted for.
These difficulties of lifting and characterization are detached also by authors [23, 24, 25], and others, according to which the tropical grounds it has the reputation of there are “problematic soils” because of without being fitted in the classification systems usually used as they were developed for temperate climates; there is also the need to use adequate methods for them, since the destruction of the cement and its original structure compromises the analysis of its behavior.
Variability in its engineering properties implies, in many situations, a difficulty to meet traditional specifications or consecrated use. An example put forward by [8] is that these materials usually have gaps in the graduation curve (e.g., in the coarse sand fraction); high plasticity indices (PIs 15-20) and CBR values below the minimum 80% are normally specified. An interesting discussion about unconventional materials and their research can be seen in [26].
The geotechnical behavior of these soils is therefore influenced more by their unsaturated condition and by factors such as their structure, macro- and microporosity, anisotropy, and genesis than by their stress history [27, 28, 29].
As mentioned above, studies on tropical soils often exhibit a higher degree of difficulty because of their mineralogical, textural, and structural variability, and this is not an exception in the Brazilian territory. Several researchers have studied the behavior of these soils both in the context of the execution of works and for experimental purposes, in universities and research centers. One aspect to highlight is the contribution of foreign companies and professionals in recent years to enriching the knowledge and discussion of engineering problems from the exchange of ideas [30].
Although the country has soil surveys developed by EMBRAPA (Brazilian Agribusiness Research Company) and other research bodies, these are mainly for use in agriculture, without the geotechnical focus [31].
In this context, the peculiarities of Brazilian soils (occurrence, constitution, formation, properties, indices, and environmental conditions) are therefore different from the conditions found in the temperate climate regions where the traditional soil classification systems were developed [4, 7].
It is thus observed that the physical, chemical, biological, pedological, and geomorphological processes vary throughout the area of occurrence of these soils and also in Brazil, where they are distributed over 80% of the territory, as shown in Figure 5 [32].
Area of occurrence of laterite soils in Brazil represented by dark brown colors and hachuras [
Since knowledge of where a work will be deployed depends primarily on well-designed and developed local research, one of the important aspects for the development of an assertive engineering project is the description of the soil profile. Expedited forecasts of collapsible or expansive soil behavior could be inferred from pedological classifications, where in addition to soil identification and classification, information about soil genesis is provided. This is because there is a close dependence on the tropical humid climate of the changing soils in relation to the matrix rock, as, for example, granites decompose originating mycaceous soils with particles of clay and sand, and basalts change basically in clays [3].
Of course, the use of generic profiles is inadvisable and local research can in no way be replaced. Consequently, the use of the geological description of the soil profile in engineering projects is considered essential, and the ignorance of the soil profile leads the designer to make predictions with a degree of uncertainty above that tolerated in the standards. On the other side, when the origin was known and the characteristics of the whole region and of the profile in an individual place the foresight becomes more assertive, reducing risks, costs, and creating solutions more appropriate to each situation [33, 34].
The occurrence of porous layers of clay or sandy texture and materials with varying degree of intemperization is frequent in Brazilian soil profiles, requiring in some situations, analyses and more complex models regarding the geotechnical behavior of the soil. Figures 6 through 8 present some profiles of lateritic soils found in engineering works in Brazil.
Soil profile along the tunnel, South Wing, Brasilia [
Profile of shear module variation for Caxingui Shaft of Sao Paulo subway [
Site characteristic profiles [
In relation to the research methods, one of the most used in Brazilian geotechnical engineering for underground research is the survey of simple recognition of soil with SPT test as highlighted [36, 37], its execution currently governed by the Brazilian NBR 6484:2020. Despite the existence of other methods, the tendency to use this remains, either for its lower cost compared with the other methods (CPT, DMT, geophysical, or other) or for the fact that it does not require specialized labor, for the empirical correlations that are established from or by which other methods are little publicized in the universities.
This tendency of using the sounding SPT can be observed in an abreve consultation to the site of the ABMS (Brazilian Association of Mechanics of Grounds) in which nearly 100 articles are listed that wrap different applications of the method in several types of work (https://philos.sophia.com.br/terminal/8530/) as in [32, 38, 39, 40, 41, 42, 43] and many other authors.
However, in some situations where the size of the work, geological complexity, or even academic studies so require, and other methods are used such as CPT (cone penetration test) or DMT (Dilatometer Marchetti Test) as well as the collection of undeformed samples for laboratório testing (triaxial compression, shear strength, deformation, modulus, and others) as exemplified by the work of [22, 30, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55].
As previously mentioned, lateritic soils can present quite varied behaviors, which requires the implementation of projects that take into account their geotechnical properties, obtained from field and/or laboratory tests. The growing urbanization and verticalization of cities in the center-south region of Brazil, as well as the increase in infrastructure works, lead to increasing challenges in foundation design, since the foundation elements must consider the high loads to be distributed frequently. For this, the use of piles has been the most common foundation option, since in some situations, geotechnical limitations occur due to soil properties such as high porosity and/or the collapsible character or excessive settlements in the face of loads, which do not allow the use of direct foundation.
One example of this behavior is the soils of the city of Brasilia, located in the state of Goiás, which is located in an area of highly weathered tropical soil, with high levels of aluminum and iron. As a consequence of the high porosity of the cemented structure of this soil, known as “porous clay,” it presents great structural instability and can sorer that is highly unstable and can suffer changes in volume (collapse) due to changes in saturation and stress state. The possibility of sharp deformations must be considered since this type of soil covers 80% of the area of the municipality [53, 54, 55].
Figure 9 illustrates the SPT index strengths in the study conducted by [53, 54] and the strength parameters of unsaturated porous clay, according to Mohr-Coulomb criteria that can be considered as Cohesion angle ranging from 20 to 34 KPa, friction angle () between 25 and 28° and Young’s modulus varying 1–8 Mpa, Coefficient of collapsibility is 0–12%, Coefficient of permeability is 10−06–10−03 cm/s [55, 56]. The tests to evaluate the granulometry of the soil composed of sieving and sedimentation, in addition to the Atteberg limits test, allowed the classification of the soil as CH by the Unified Classification system, with a plastic Index of 12% and a natural unit weight around 15 kN/m3. This porous clay layer has a variable thickness of 20–30 m and NSPT indexes between 2 and 3 strokes with a deep water level, and in some cases reaching a depth of 5 m. Liquid limit LL = 50–80%, plastic limit PL = 35–50%, and water content w = 35–55%. The clay fraction, that is, the percentage of soil particles less than 2 μm lies between 70 and 55%. The percentage of fines (less than 60 μm in diameter,) varies from 70 and 80% [55].
Stratigraphy and SPT-SPTT results [
Considering the characteristics observed in the drilling and laboratory tests, the authors state that a foundation option that has been used in the city of Brasilia and neighboring cities is the Alluvial Pile Anker, a new type of small diameter foundation characterized by fast execution, with technical and economic advantages over precast piles. It consists of drilling small diameter piles, where a 2 ½″ tube, 50 cm longer than the depth of the hole, with a cutting tip (Figure 10), is installed in the ground at very high speed, and the soil is drilled through rotation. The hole is filled with cement, and after it has been drilled, the capping is made with precast-reinforced concrete or steel sheeting on each pile. A gravel backfill is placed between the capstones at the same height, and a geogrid is placed over it, followed by a transition backfill that acts as a stress dissipator [53, 57].
Alluvial Anker pile construction process [
It should be noted that in foundations embedded in lateritic or collapsible soils, the rigor in the design process and in the design should be greater, because the behavior of these foundations often differs from the classical models adopted and presented in the technical-scientific literature, being possible to observe a nonlinearity of the soil behavior due to variations in the soil parameters that control its behavior: modulus of deformation and shear modulus of the soil [58]. It is fundamental for pile foundation design like aspects such as the relative stiffness of the lateritic soil of the first layer when not saturated; the collapsibility of this soil, especially if the piles are totally embedded in this layer and the evaluation of the ultimate strength, due to its own executive process, be taken into consideration.
Studies conducted in collapsible lateritic soils in the city of Campinas, state of São Paulo, where most of the foundations employed are deep, with auger piles being the most commonly used, show the use of foundations executed as staked foundations, for example, a foundation element where the piles under the radier are interrelated may have greater efficiency in the reduction of settlements, because the greater contact of the surface foundation element contributes to the performance of load capacity and settlement reduction for the system [59, 60].
In the city of São Paulo, the construction of an extensive subway network allowed obtaining geotechnical parameters of soils existing in the São Paulo Basin from the study of 12 different sites, which demonstrated the heterogeneity of the profiles, comprising alternating layers of sandy clays and clayey sand with silt fractions. However, the horizontal stress index (Kd) revealed values greater than 2, confirming the overconsolidation of the variegated soils, which had been previously reported in the literature [22]. The
It is noteworthy that lateritic soils can also present variation in their behavior as a function of matrix suction variation, and therefore, their geotechnical investigation should be careful [21, 26, 33, 58, 61, 62].
Furthermore, one must consider the resistance variation presented by laterite soils that vary considerably with depth, according to the influence of such factors as parent rock, depth of the water table, topography, degrees of decomposition, laterization, and desiccation, as well as mineralogical composition. Also in relation to mineralogy, if the clay present in the soil has the presence of iron oxide in ferric state, the soil is essentially stable and no changes are expected and therefore, standard tests can be employed for soil characterization [8, 32, 63].
Tropical soils occur over a large area of the planet, occupying about 40% of the surface. The tropical climate is responsible for the laterization process, which generates well-drained soils, porous, reddish in color, and with characteristics different from those of temperate soils and that may require, by their nature, solutions different from those proposed by classical soil mechanics.
Despite the importance of these soils, there is still no integrated database on their characteristics and behavior. In Brazil, residual and saprolitic soils are a challenge to engineering because they range from highly weathered and well-drained, porous soils in tropical and subtropical climates to thin and poorly developed soils in regions of the country where the drier climate predominates.
This chapter has aimed to approach some aspects of the soils in Brazil, without the pretension of exhausting the subject, which is of great interest to the country and others that are located in the tropical region.
There is a need for further investigation of soils not only in terms of fertility or application to agriculture, as is often the case, but also in terms of geotechnical aspects for the execution of foundations and roads, retaining structures, among others, so that field and laboratory tests can be conducted, not only in the south and southeast regions, but also in other regions, considering the constant expansion of the country’s infrastructure, including international partnerships.
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Eduardo Rebolledo Ranz",coverURL:"https://cdn.intechopen.com/books/images_new/7561.jpg",editedByType:"Edited by",editors:[{id:"193813",title:"Dr.",name:"Ramón Eduardo",middleName:null,surname:"Rebolledo Ranz",slug:"ramon-eduardo-rebolledo-ranz",fullName:"Ramón Eduardo Rebolledo Ranz"}],equalEditorOne:null,equalEditorTwo:null,equalEditorThree:null,productType:{id:"1",chapterContentType:"chapter",authoredCaption:"Edited by"}},{type:"book",id:"6619",title:"Insect Science",subtitle:"Diversity, Conservation and Nutrition",isOpenForSubmission:!1,hash:"08241b041b2072a88452041f8fdebe7e",slug:"insect-science-diversity-conservation-and-nutrition",bookSignature:"Mohammad Manjur Shah and Umar Sharif",coverURL:"https://cdn.intechopen.com/books/images_new/6619.jpg",editedByType:"Edited by",editors:[{id:"94128",title:"Dr.",name:"Mohammad Manjur",middleName:null,surname:"Shah",slug:"mohammad-manjur-shah",fullName:"Mohammad Manjur Shah"}],equalEditorOne:null,equalEditorTwo:null,equalEditorThree:null,productType:{id:"1",chapterContentType:"chapter",authoredCaption:"Edited by"}},{type:"book",id:"5163",title:"Beekeeping and Bee Conservation",subtitle:"Advances in Research",isOpenForSubmission:!1,hash:"fc469ff4d2cf6651cfdbf3c5cf90a469",slug:"beekeeping-and-bee-conservation-advances-in-research",bookSignature:"Emerson Dechechi Chambo",coverURL:"https://cdn.intechopen.com/books/images_new/5163.jpg",editedByType:"Edited by",editors:[{id:"94059",title:"Dr.",name:"Emerson",middleName:"Dechechi",surname:"Dechechi Chambó",slug:"emerson-dechechi-chambo",fullName:"Emerson Dechechi Chambó"}],equalEditorOne:null,equalEditorTwo:null,equalEditorThree:null,productType:{id:"1",chapterContentType:"chapter",authoredCaption:"Edited by"}}],booksByTopicTotal:5,seriesByTopicCollection:[],seriesByTopicTotal:0,mostCitedChapters:[{id:"50073",doi:"10.5772/62487",title:"Impacts of Pesticides on Honey Bees",slug:"impacts-of-pesticides-on-honey-bees",totalDownloads:3367,totalCrossrefCites:18,totalDimensionsCites:39,abstract:"This chapter focuses on the detrimental effects that pesticides have on managed honey bee colonies and their productivity. We examine first the routes of exposure of bees to agrochemicals used for crop protection and their application to crops, fate and contamination of water and plants around the fields. Most of the time, the exposure of bees to pesticides is through ingestion of residues found in the pollen and nectar of plants and in water. Honey bees are also exposed to pesticides used for the treatment of Varroa and other parasites. The basic concepts about the toxicity of the different kinds of pesticides are explained next. Various degrees of toxicity are found among agrochemicals, and emphasis is given to the classic tenet of toxicology, “the dose makes the poison,” and its modern version “the dose and the time of exposure makes the poison.” These two factors, dose and time, help us understand the severity of the impacts that pesticides may have on bees and their risk, which are analysed in the third section. Sublethal effects are also considered. The final section is devoted to some practical advice for avoiding adverse impacts of pesticides in beekeeping.",book:{id:"5163",slug:"beekeeping-and-bee-conservation-advances-in-research",title:"Beekeeping and Bee Conservation",fullTitle:"Beekeeping and Bee Conservation - Advances in Research"},signatures:"Francisco Sanchez-Bayo and Koichi Goka",authors:[{id:"74970",title:"Dr.",name:"Francisco",middleName:null,surname:"Sánchez-Bayo",slug:"francisco-sanchez-bayo",fullName:"Francisco Sánchez-Bayo"},{id:"192045",title:"Dr.",name:"Koichi",middleName:null,surname:"Goka",slug:"koichi-goka",fullName:"Koichi Goka"}]},{id:"59212",doi:"10.5772/intechopen.73864",title:"Insect Conservation for the Twenty-First Century",slug:"insect-conservation-for-the-twenty-first-century",totalDownloads:1941,totalCrossrefCites:7,totalDimensionsCites:14,abstract:"Insects have been immensely successful as an animal group. They dominate compositional diversity of all but the saltiest and coldest parts of the planet. Yet today insects are declining at a precipitous rate. This is of great concern in terms of impoverishment of Earth, and is also dire for us. Insects contribute to the maintenance of terrestrial and freshwater systems, their service delivery and their resilience. The meteoric impact of humans is challenging this dominance, yet so few people realize that the very fabric of life on which they depend is being unraveled at an alarming rate. Action is required, as are new perspectives, if we are to maintain insect diversity and services through the twenty-first century. Here, we review how we should view and act to have more effective insect diversity conservation based on six themes: (1) philosophy (establishing the ethical foundation), (2) research (the finding out), (3) policy (the framework for action), (4) psychology (understanding how to engage humans in insect conservation action), (5) practice (implementation of action), and (6) validation (establishing how well we are doing at conserving insects). We then overview some emergent challenges and solutions at both the species and landscape operational levels in agricultural, forestry, and urban environments.",book:{id:"6619",slug:"insect-science-diversity-conservation-and-nutrition",title:"Insect Science",fullTitle:"Insect Science-Diversity, Conservation and Nutrition"},signatures:"Michael J. Samways",authors:[{id:"233323",title:"Distinguished Prof.",name:"Michael",middleName:null,surname:"Samways",slug:"michael-samways",fullName:"Michael Samways"}]},{id:"79121",doi:"10.5772/intechopen.100416",title:"Botanical Insecticides Are a Non-Toxic Alternative to Conventional Pesticides in the Control of Insects and Pests",slug:"botanical-insecticides-are-a-non-toxic-alternative-to-conventional-pesticides-in-the-control-of-inse",totalDownloads:229,totalCrossrefCites:4,totalDimensionsCites:9,abstract:"Insect control for crops is one of the most critical global concerns. Pest management is an economic and ecological problem worldwide due to the human and environmental risks raised by most synthetic pesticide products. Botanical insecticides have resurfaced in popularity due to their low cost and low environmental impact, rather than their negative effects on human health. Botanical insecticides destroy only the insects they are meant to kill, leaving no residue on food or in the environment. Botanicals have long been used to combat pests. The compounds have many environmental advantages. However, as opposed to other bio-control pests and pathogens, their use was minimal during the twentieth century. In developing countries, botanical insecticides are well adapted for use in organic food production. Nonetheless, they may play a far bigger role in developed countries’ food production and post-harvest food protection. Consequently, the current chapter briefly addresses botanicals with active ingredients with insecticidal, antifeedant, or repellent properties.",book:{id:"10739",slug:null,title:"Global Decline of Insects",fullTitle:"Global Decline of Insects"},signatures:"Nazeer Ahmed, Mukhtar Alam, Muhammad Saeed, Hidayat Ullah, Toheed Iqbal, Khalid Awadh Al-Mutairi, Kiran Shahjeer, Rafi Ullah, Saeed Ahmed, Nibal Abd Aleem Hassan Ahmed, Hanem Fathy Khater and Muhammad Salman",authors:null},{id:"50307",doi:"10.5772/62654",title:"From Extraction to Meliponiculture: A Case Study of the Management of Stingless Bees in the West-Central Region of Mexico",slug:"from-extraction-to-meliponiculture-a-case-study-of-the-management-of-stingless-bees-in-the-west-cent",totalDownloads:2730,totalCrossrefCites:5,totalDimensionsCites:9,abstract:"Currently, stingless bees' populations are declining due to environmental degradation. In this context, the authors have developed a research project in the central-western region of Mexico with the goal to generate strategies for conservation and sustainable management of stingless bees. The chapter aims to present the process of this investigation and its main results in terms of a) local knowledge and management strategies of stingless bees, and b) the social process of technological appropriation of meliponiculture by beekeepers. We recognized specific knowledge on the biology and ecology of stingless bees that result in a system for identifying species and management strategies of wild populations of these bees based on the extraction of nests. The implementation of an innovative productive activity based on the principles of meliponiculture and current techniques has been well received by producers, which has led to the formation of the Meliponicultores Michoacanos del Balsas Association, which grows five species of stingless bees. The research suggests that conservation associated with the use of bees (integral meliponiculture) can be enhanced in the region. Faced with the loss of biodiversity and environmental crisis, it is essential to maintain and enhance local knowledge of stingless bees and management practices. This represents an alternative to develop management schemes that allow the raising and breeding of these bees, while its products are obtained.",book:{id:"5163",slug:"beekeeping-and-bee-conservation-advances-in-research",title:"Beekeeping and Bee Conservation",fullTitle:"Beekeeping and Bee Conservation - Advances in Research"},signatures:"Alejandro Reyes-González, Andrés Camou-Guerrero and Salvador\nGómez-Arreola",authors:[{id:"179951",title:"Dr.",name:"Andres",middleName:null,surname:"Camou-Guerrero",slug:"andres-camou-guerrero",fullName:"Andres Camou-Guerrero"},{id:"185413",title:"MSc.",name:"Alejandro",middleName:null,surname:"Reyes-González",slug:"alejandro-reyes-gonzalez",fullName:"Alejandro Reyes-González"},{id:"192049",title:"Dr.",name:"Salvador",middleName:null,surname:"Gómez-Arreola",slug:"salvador-gomez-arreola",fullName:"Salvador Gómez-Arreola"}]},{id:"50683",doi:"10.5772/63145",title:"Advances in Pharmacological Activities and Chemical Composition of Propolis Produced in Americas",slug:"advances-in-pharmacological-activities-and-chemical-composition-of-propolis-produced-in-americas",totalDownloads:2555,totalCrossrefCites:2,totalDimensionsCites:8,abstract:"Propolis is a resinous material produced by bees from the selective collection of plant exudates that are subsequently mixed with beeswax and salivary bee secretions. Propolis has been used in folk medicine, and certainly, several studies have validated its biological properties. The chemical composition and pharmacological activities of propolis collected through North (including Central America and Caribbean) and South America have been studied in the last years, and several papers have reported differences and similarities among the analysed geographical samples. Propolis has been classified according to its aspect and plant source; however, the ecological diversity present along the Americas provides a plethora of botanical resins. Herein, we summarize and discuss most of the studies performed at present on this profitable product for apiculture, attempting to compare the bioactivity, phytochemical diversity and botanical sources of honeybee propolis produced in Americas.",book:{id:"5163",slug:"beekeeping-and-bee-conservation-advances-in-research",title:"Beekeeping and Bee Conservation",fullTitle:"Beekeeping and Bee Conservation - Advances in Research"},signatures:"Efrain Alday, Moisés Navarro-Navarro, Adriana Garibay-Escobar,\nRamón Robles-Zepeda, Javier Hernandez and Carlos Velazquez",authors:[{id:"96966",title:"MSc.",name:"Moises",middleName:null,surname:"Navarro-Navarro",slug:"moises-navarro-navarro",fullName:"Moises Navarro-Navarro"},{id:"180409",title:"Dr.",name:"Carlos",middleName:null,surname:"Velazquez",slug:"carlos-velazquez",fullName:"Carlos Velazquez"},{id:"186351",title:"Dr.",name:"Ramón",middleName:null,surname:"Robles-Zepeda",slug:"ramon-robles-zepeda",fullName:"Ramón Robles-Zepeda"},{id:"186352",title:"MSc.",name:"Efrain",middleName:null,surname:"Alday",slug:"efrain-alday",fullName:"Efrain Alday"},{id:"186353",title:"Dr.",name:"Javier",middleName:null,surname:"Hernandez",slug:"javier-hernandez",fullName:"Javier Hernandez"},{id:"189161",title:"Dr.",name:"Adriana",middleName:null,surname:"Garibay-Escobar",slug:"adriana-garibay-escobar",fullName:"Adriana Garibay-Escobar"}]}],mostDownloadedChaptersLast30Days:[{id:"50170",title:"A Comprehensive Characterization of the Honeybees in Siberia (Russia)",slug:"a-comprehensive-characterization-of-the-honeybees-in-siberia-russia-",totalDownloads:2274,totalCrossrefCites:4,totalDimensionsCites:8,abstract:"A comprehensive study of some populations of honeybee (332 colonies) in Siberia (Tomsk region, Krasnoyarsk Krai (Yenisei population), Altai) using morphometric and molecular genetic methods was conducted. Infestation of bees (132 colonies) by Nosema has also been studied. Three variants of the COI-COII mtDNA locus were registered: PQQ, PQQQ (typical for Apis m. mellifera), and Q (specific for southern races). It was established that 64% of bee colonies from the Tomsk region and all colonies studied from the Krasnoyarsk and the Altai territories originate from Apis m. mellifera on the maternal line. According to the morphometric study, the majority of bee colonies of the Tomsk region are hybrids; in some colonies the mismatch of morphometric and mtDNA data was observed. Moreover, the majority of bee colonies infected by Nosema were hybrids. Yenisei population may be considered as a unique Apis m. mellifera population. Microsatellite analysis (loci А008, Ap049, AC117, AC216, Ap243, H110, A024, A113) showed the specific distribution of genotypes and alleles for some loci in the bees, which differ by geographical location. Loci A024 and Ap049 are of considerable interest for further study as candidate markers for differentiation of subspecies; locus A008 can be considered informative for determining of different ecotypes of Apis m. mellifera.",book:{id:"5163",slug:"beekeeping-and-bee-conservation-advances-in-research",title:"Beekeeping and Bee Conservation",fullTitle:"Beekeeping and Bee Conservation - Advances in Research"},signatures:"Nadezhda V. Ostroverkhova, Olga L. Konusova, Aksana N. Kucher\nand Igor V. Sharakhov",authors:[{id:"180112",title:"Ph.D.",name:"Nadezhda",middleName:null,surname:"Ostroverkhova",slug:"nadezhda-ostroverkhova",fullName:"Nadezhda Ostroverkhova"},{id:"180249",title:"Ms.",name:"Olga",middleName:null,surname:"Konusova",slug:"olga-konusova",fullName:"Olga Konusova"},{id:"180342",title:"Prof.",name:"Aksana",middleName:null,surname:"Kucher",slug:"aksana-kucher",fullName:"Aksana Kucher"},{id:"180343",title:"Prof.",name:"Igor",middleName:null,surname:"Sharakhov",slug:"igor-sharakhov",fullName:"Igor Sharakhov"}]},{id:"70501",title:"Southeast Asian Meliponiculture for Sustainable Livelihood",slug:"southeast-asian-meliponiculture-for-sustainable-livelihood",totalDownloads:1235,totalCrossrefCites:2,totalDimensionsCites:5,abstract:"Stingless bees (Apidae: Meliponini) are one of the most important pollinators of native plants and economic crops in tropical and subtropical parts of the world. They not only establish large perennial colonies with complex social organization but also have a diverse nesting biology. The economic utilization of a total of 60 stingless bee species in Asia has been reported. The current status of meliponiculture in Southeast Asia is mainly focused on pollination utilization and honey and propolis production. This chapter shows that small-scale beekeeping of stingless bees, which is suitable for the flowering pattern in the tropics, is one of the best potential alternative opportunities. The cost-effectiveness analysis based on production yield, investment cost, and profit-return rate is reviewed. Finally, a sustainable utilization of stingless bees is considered to be an enhancer of pollination services both in an agricultural crop and natural ecosystem.",book:{id:"8929",slug:"modern-beekeeping-bases-for-sustainable-production",title:"Modern Beekeeping",fullTitle:"Modern Beekeeping - Bases for Sustainable Production"},signatures:"Atsalek Rattanawannee and Orawan Duangphakdee",authors:[{id:"283087",title:"Ph.D.",name:"Atsalek",middleName:null,surname:"Rattanawannee",slug:"atsalek-rattanawannee",fullName:"Atsalek Rattanawannee"},{id:"306411",title:"Dr.",name:"Orawan",middleName:null,surname:"Duangphakdee",slug:"orawan-duangphakdee",fullName:"Orawan Duangphakdee"}]},{id:"50073",title:"Impacts of Pesticides on Honey Bees",slug:"impacts-of-pesticides-on-honey-bees",totalDownloads:3367,totalCrossrefCites:18,totalDimensionsCites:39,abstract:"This chapter focuses on the detrimental effects that pesticides have on managed honey bee colonies and their productivity. We examine first the routes of exposure of bees to agrochemicals used for crop protection and their application to crops, fate and contamination of water and plants around the fields. Most of the time, the exposure of bees to pesticides is through ingestion of residues found in the pollen and nectar of plants and in water. Honey bees are also exposed to pesticides used for the treatment of Varroa and other parasites. The basic concepts about the toxicity of the different kinds of pesticides are explained next. Various degrees of toxicity are found among agrochemicals, and emphasis is given to the classic tenet of toxicology, “the dose makes the poison,” and its modern version “the dose and the time of exposure makes the poison.” These two factors, dose and time, help us understand the severity of the impacts that pesticides may have on bees and their risk, which are analysed in the third section. Sublethal effects are also considered. The final section is devoted to some practical advice for avoiding adverse impacts of pesticides in beekeeping.",book:{id:"5163",slug:"beekeeping-and-bee-conservation-advances-in-research",title:"Beekeeping and Bee Conservation",fullTitle:"Beekeeping and Bee Conservation - Advances in Research"},signatures:"Francisco Sanchez-Bayo and Koichi Goka",authors:[{id:"74970",title:"Dr.",name:"Francisco",middleName:null,surname:"Sánchez-Bayo",slug:"francisco-sanchez-bayo",fullName:"Francisco Sánchez-Bayo"},{id:"192045",title:"Dr.",name:"Koichi",middleName:null,surname:"Goka",slug:"koichi-goka",fullName:"Koichi Goka"}]},{id:"74836",title:"Chironomidae: Biology, Ecology and Systematics",slug:"chironomidae-biology-ecology-and-systematics",totalDownloads:426,totalCrossrefCites:0,totalDimensionsCites:0,abstract:"The family of Chironomidae is a group of Diptera insects belonging to the suborder of Nematocera, commonly called “non-biting midges” in the adult stage and “bloodworms” in the larval stage. The Chironomidae are often the most abundant group of macroinvertebrates, in number of species and individuals, encountered in all aquatic environments of freshwater, brackish, terrestrial and even the sea. Likewise, Chironomidae occur in all the continents. The Chironomidae family is divided into 11 sub-families that have diffrent ecological statues. Despite the wealth of data on Chironomidae in the Holarctic region, other parts of the world are poorly studied and few guides to identifying Chironomidae have been produced. This chapter includes a theoretical synthesis on the Chironomidae, it deals with the Biology (life cycle and description of different stages), description of all subfamilies and the ecology of this important family of Diptera.",book:{id:"10423",slug:"the-wonders-of-diptera-characteristics-diversity-and-significance-for-the-world-s-ecosystems",title:"The Wonders of Diptera",fullTitle:"The Wonders of Diptera - Characteristics, Diversity, and Significance for the World's Ecosystems"},signatures:"Zerguine Karima",authors:[{id:"334825",title:"Dr.",name:"Karima",middleName:null,surname:"Zerguine",slug:"karima-zerguine",fullName:"Karima Zerguine"}]},{id:"75438",title:"Characteristics of Dipteran Insects",slug:"characteristics-of-dipteran-insects",totalDownloads:485,totalCrossrefCites:0,totalDimensionsCites:0,abstract:"Diptera means two wings (Di: two, pteron: wing). They have complete metamorphosis and they are holometabolous insects which means there are 4 stages (egg, larvae, pupae and adult). The name of larval stage is “maggot”. Some of the dipteran insects cause damage in agricultural production. Some are harmful for humans. Dipteran insects have two wings. Hind wings are reduced and they are called “halteres”. Function of halteres is balancing when the insects fly. Except mosquitoes, dipteran insects have sponging-sucking mouthparts. Important examples for dipteran insects are Olive fruit fly and Medfly which cause damages in agricultural production. OFF is the most destructive pest in olive growing areas and Mediterranean fruit fly cause damages in fruit production.",book:{id:"10423",slug:"the-wonders-of-diptera-characteristics-diversity-and-significance-for-the-world-s-ecosystems",title:"The Wonders of Diptera",fullTitle:"The Wonders of Diptera - Characteristics, Diversity, and Significance for the World's Ecosystems"},signatures:"Murat Helvacı",authors:[{id:"301984",title:"Ph.D.",name:"Murat",middleName:null,surname:"Helvaci",slug:"murat-helvaci",fullName:"Murat Helvaci"}]}],onlineFirstChaptersFilter:{topicId:"35",limit:6,offset:0},onlineFirstChaptersCollection:[{id:"78491",title:"Insect Conservation and Management: A Need of the Hour",slug:"insect-conservation-and-management-a-need-of-the-hour",totalDownloads:26,totalDimensionsCites:0,doi:"10.5772/intechopen.100023",abstract:"Insects play a very vital role in divergent ecosystems and have gained great economic and medical importance as pollinators, pests, predators, parasitoids, decomposers and vectors. With the large-scale practice of synthetic pesticides, the diminishing rate of beneficial and pollinator insects is increasing rapidly. Environmental pollution, climate change, global warming, urbanization, industrialization and some natural calamities like wildfires add more fuel to the acceleration of insect decline all over the world. Alternative steps should be employed to replace the toxic pesticides and implementation of integrated pest management (IPM) should be put forward to reduce the overuse of synthetic pesticides and fertilizers, which have a great impact on beneficial insects as well as birds, aquatic organisms, and also on human health. The present study aims to create awareness among the researchers and general public by providing a brief review of insect importance, decline and conservation strategies.",book:{id:"10739",title:"Global Decline of Insects",coverURL:"https://cdn.intechopen.com/books/images_new/10739.jpg"},signatures:"Muzafar Riyaz, Rauf Ahmad Shah and Soosaimanickam Maria Packiam"},{id:"80971",title:"Agricultural Intensification Causes Decline in Insect Biodiversity",slug:"agricultural-intensification-causes-decline-in-insect-biodiversity",totalDownloads:47,totalDimensionsCites:0,doi:"10.5772/intechopen.101360",abstract:"The world’s population exceeded 7 billion in late 2011 and it is expected to reach 9.3 billion by 2050. Meanwhile, demand for food is predicted to increase between 50 and 100% by 2050. To meet the food demands of the increasing population, agricultural intensification practices including growing monocultures of high-yielding crop varieties and increased applications of fertilizers and pesticides have been used to increase productivity. These practices, however, impact negatively on biodiversity of existing flora and fauna, particularly causing huge declines in insect biodiversity. This chapter reviews present state of knowledge about agricultural intensification practices and global decline of insect biodiversity (i.e., pest and beneficial insect species) in intensive agricultural system and point out the likely drivers of these declines. It concludes the review by examining sustainable agricultural intensification practices that could be used to mitigate these biodiversity declines while maintaining productivity in intensive agricultural systems.",book:{id:"10739",title:"Global Decline of Insects",coverURL:"https://cdn.intechopen.com/books/images_new/10739.jpg"},signatures:"Mumuni Abudulai, Jerry Asalma Nboyine, Peter Quandahor, Ahmed Seidu and Fousséni Traore"},{id:"78872",title:"Diversity, Importance and Decline of Pollinating Insects in Present Era",slug:"diversity-importance-and-decline-of-pollinating-insects-in-present-era",totalDownloads:81,totalDimensionsCites:0,doi:"10.5772/intechopen.100316",abstract:"Pollination is a multi-million-year-old co-evolutionary process involving flowering plants and pollinators. It is one of the most important mechanisms in preservation and promotion of biodiversity as well as life on Earth. Pollinator diversity is essential for maintaining overall biological diversity in many habitats including agro-ecosystems. Pollinators are responsible for assisting reproduction in over 80% of the world’s flowering plants. In their absence, humans and wildlife would go hungry. Insects are the most efficient pollinators as they play a crucial part in pollination ecology. Pollinators and their habitats have ecological, economic, cultural and social benefits. Pollination efficiency is highly dependent on certain attributes and characteristics of pollinators such as vision, anatomy, food preferences, olfaction, behaviour and learning ability. With the rapid growth of human population, our demand for food has also risen. Our agricultural systems will need to produce more food in a sustainable manner in the future to cope with this. Pollinators play an important role in these ecosystems and will continue to do so in the future. Because pollinators are so important to agriculture, we need to learn more about which crops require specific pollinators and how to best maintain and promote both wild and controlled species. Their diversity needs protection because there are specific relationships between certain crops and pollinators. Pollinator communities are suffering as a result of man-made habitat disruptions, including severe biodiversity loss. This diversity must be protected by combining conservation measures with sustainable farming practices which could increase crop yields while protecting insect pollinator species.",book:{id:"10739",title:"Global Decline of Insects",coverURL:"https://cdn.intechopen.com/books/images_new/10739.jpg"},signatures:"Navkiran Kaur and Amritpal Singh Kaleka"},{id:"80012",title:"Impacts of Organic Farming on Insects Abundance and Diversity",slug:"impacts-of-organic-farming-on-insects-abundance-and-diversity",totalDownloads:105,totalDimensionsCites:0,doi:"10.5772/intechopen.102035",abstract:"Organic farming encourages maximum utilization of the natural biological processes to manage the farm in terms of soil fertilization and pest control, which implies using none or less synthetic fertilizers, pesticides, and plant and animal growth-promoting substances. All these practices increase arthropod diversity, particularly soil-dwelling insects. Intercropping, cover crops, and hedges, which are common practices in organic fields, provide alternative habitats for arthropod communities. The refugia also provide a good source of food for pollinators in terms of pollen grains and nectar. The interactions among the different plant and animal taxa (weeds, birds, mammals) that are found in the organic farming ecosystem have a great impact on insects’ abundance and diversity. This chapter summarizes the impacts of the organic farming system on the abundance and diversity of insects. The role of organic farming in mitigating the impact of agriculture intensification, urbanization, deforestation, and climate change on global insects’ decline and diversity loss is discussed.",book:{id:"10739",title:"Global Decline of Insects",coverURL:"https://cdn.intechopen.com/books/images_new/10739.jpg"},signatures:"Hamadttu Abdel Farag El-Shafie"},{id:"78945",title:"Botanical Insecticides and their Potential as Anti-Insect/Pests: Are they Successful against Insects and Pests?",slug:"botanical-insecticides-and-their-potential-as-anti-insect-pests-are-they-successful-against-insects-",totalDownloads:197,totalDimensionsCites:7,doi:"10.5772/intechopen.100418",abstract:"In low-income countries, subsistence and transitional farms frequently use botanical insecticides. The shortage or high cost of industrial pesticides also prompts their use. Botanical insecticides are also prescribed by agricultural and development programs and certain development organizations. However, since insecticidal proof of their effectiveness and protection might not be sufficient or usable, this may be called into question. While insecticidal botanicals have been extensively studied, there has yet to be a fusion that focuses especially on the domestic synthesis of biopesticides that work infield and storage effectively. In this chapter, we look at the effectiveness of botanicals (neem, garlic, and essential oil) that are used as insecticides. In addition, this chapter also focuses on research carried out on the use of these essential oils as insecticides. Processes that use variable amounts of ingredients and concentrations and ratios of active ingredients can have varying impacts on the efficacy of plant-based biological insecticides. Finally, using home-made insecticides would reduce the losses that occur during food production and enable us to use environment-friendly pest management methods.",book:{id:"10739",title:"Global Decline of Insects",coverURL:"https://cdn.intechopen.com/books/images_new/10739.jpg"},signatures:"Toheed Iqbal, Nazeer Ahmed, Kiran Shahjeer, Saeed Ahmed, Khalid Awadh Al-Mutairi, Hanem Fathy Khater and Reham Fathey Ali"},{id:"79060",title:"Description of a New Species of the Genus Anagrus (Hymenoptera: Chalcidoidea: Mymaridae): A Biocontrol Agent as an Alternative to Insecticide Use",slug:"description-of-a-new-species-of-the-genus-anagrus-hymenoptera-chalcidoidea-mymaridae-a-biocontrol-ag",totalDownloads:75,totalDimensionsCites:0,doi:"10.5772/intechopen.99957",abstract:"Although insects are economically important as they produce honey, silk, act as pollinators and also play an important role in functioning of an ecosystem, yet insect population is declining very fast. One of the possible causes of insects decline is excessive use of pesticides. Control of pest with synthetic chemicals or pesticides result in several issues and complications. These chemical pesticides or insecticides can also cause toxic effects on beneficial organisms like honeybees and butterflies which are important pollinators. So, biocontrol agents can be used as best alternative to control pest without harming beneficial organism and non-target insects or other organism as majority of biocontrol agents are host specific. Biological control agents including predators and parasotoids are natural enemies of insect pests. Present chapter deals with the description and illustration of one new species Anagrus (Anagrus) sololinearis sp.nov from India. This new species belongs to genus Anagrus (Hymenoptera: Chalcidoidea: Mymaridae). Genus Anagrus is considered as one of the important and most promising biocontrol agents in insects as it is an egg parasitoid.",book:{id:"10739",title:"Global Decline of Insects",coverURL:"https://cdn.intechopen.com/books/images_new/10739.jpg"},signatures:"Shireen Saleem and Shoeba Binte Anis"}],onlineFirstChaptersTotal:10},preDownload:{success:null,errors:{}},subscriptionForm:{success:null,errors:{}},aboutIntechopen:{},privacyPolicy:{},peerReviewing:{},howOpenAccessPublishingWithIntechopenWorks:{},sponsorshipBooks:{sponsorshipBooks:[],offset:0,limit:8,total:null},allSeries:{pteSeriesList:[],lsSeriesList:[],hsSeriesList:[],sshSeriesList:[],testimonialsList:[]},series:{item:{id:"14",title:"Artificial Intelligence",doi:"10.5772/intechopen.79920",issn:"2633-1403",scope:"Artificial Intelligence (AI) is a rapidly developing multidisciplinary research area that aims to solve increasingly complex problems. In today's highly integrated world, AI promises to become a robust and powerful means for obtaining solutions to previously unsolvable problems. This Series is intended for researchers and students alike interested in this fascinating field and its many applications.",coverUrl:"https://cdn.intechopen.com/series/covers/14.jpg",latestPublicationDate:"June 11th, 2022",hasOnlineFirst:!0,numberOfPublishedBooks:9,editor:{id:"218714",title:"Prof.",name:"Andries",middleName:null,surname:"Engelbrecht",slug:"andries-engelbrecht",fullName:"Andries Engelbrecht",profilePictureURL:"https://s3.us-east-1.amazonaws.com/intech-files/0030O00002bRNR8QAO/Profile_Picture_1622640468300",biography:"Andries Engelbrecht received the Masters and PhD degrees in Computer Science from the University of Stellenbosch, South Africa, in 1994 and 1999 respectively. He is currently appointed as the Voigt Chair in Data Science in the Department of Industrial Engineering, with a joint appointment as Professor in the Computer Science Division, Stellenbosch University. Prior to his appointment at Stellenbosch University, he has been at the University of Pretoria, Department of Computer Science (1998-2018), where he was appointed as South Africa Research Chair in Artifical Intelligence (2007-2018), the head of the Department of Computer Science (2008-2017), and Director of the Institute for Big Data and Data Science (2017-2018). In addition to a number of research articles, he has written two books, Computational Intelligence: An Introduction and Fundamentals of Computational Swarm Intelligence.",institutionString:null,institution:{name:"Stellenbosch University",institutionURL:null,country:{name:"South Africa"}}},editorTwo:null,editorThree:null},subseries:{paginationCount:6,paginationItems:[{id:"22",title:"Applied Intelligence",coverUrl:"https://cdn.intechopen.com/series_topics/covers/22.jpg",isOpenForSubmission:!0,editor:{id:"27170",title:"Prof.",name:"Carlos",middleName:"M.",surname:"Travieso-Gonzalez",slug:"carlos-travieso-gonzalez",fullName:"Carlos Travieso-Gonzalez",profilePictureURL:"https://mts.intechopen.com/storage/users/27170/images/system/27170.jpeg",biography:"Carlos M. Travieso-González received his MSc degree in Telecommunication Engineering at Polytechnic University of Catalonia (UPC), Spain in 1997, and his Ph.D. degree in 2002 at the University of Las Palmas de Gran Canaria (ULPGC-Spain). He is a full professor of signal processing and pattern recognition and is head of the Signals and Communications Department at ULPGC, teaching from 2001 on subjects on signal processing and learning theory. His research lines are biometrics, biomedical signals and images, data mining, classification system, signal and image processing, machine learning, and environmental intelligence. He has researched in 52 international and Spanish research projects, some of them as head researcher. He is co-author of 4 books, co-editor of 27 proceedings books, guest editor for 8 JCR-ISI international journals, and up to 24 book chapters. He has over 450 papers published in international journals and conferences (81 of them indexed on JCR – ISI - Web of Science). He has published seven patents in the Spanish Patent and Trademark Office. He has been a supervisor on 8 Ph.D. theses (11 more are under supervision), and 130 master theses. He is the founder of The IEEE IWOBI conference series and the president of its Steering Committee, as well as the founder of both the InnoEducaTIC and APPIS conference series. He is an evaluator of project proposals for the European Union (H2020), Medical Research Council (MRC, UK), Spanish Government (ANECA, Spain), Research National Agency (ANR, France), DAAD (Germany), Argentinian Government, and the Colombian Institutions. He has been a reviewer in different indexed international journals (<70) and conferences (<250) since 2001. He has been a member of the IASTED Technical Committee on Image Processing from 2007 and a member of the IASTED Technical Committee on Artificial Intelligence and Expert Systems from 2011. \n\nHe has held the general chair position for the following: ACM-APPIS (2020, 2021), IEEE-IWOBI (2019, 2020 and 2020), A PPIS (2018, 2019), IEEE-IWOBI (2014, 2015, 2017, 2018), InnoEducaTIC (2014, 2017), IEEE-INES (2013), NoLISP (2011), JRBP (2012), and IEEE-ICCST (2005)\n\nHe is an associate editor of the Computational Intelligence and Neuroscience Journal (Hindawi – Q2 JCR-ISI). He was vice dean from 2004 to 2010 in the Higher Technical School of Telecommunication Engineers at ULPGC and the vice dean of Graduate and Postgraduate Studies from March 2013 to November 2017. He won the “Catedra Telefonica” Awards in Modality of Knowledge Transfer, 2017, 2018, and 2019 editions, and awards in Modality of COVID Research in 2020.\n\nPublic References:\nResearcher ID http://www.researcherid.com/rid/N-5967-2014\nORCID https://orcid.org/0000-0002-4621-2768 \nScopus Author ID https://www.scopus.com/authid/detail.uri?authorId=6602376272\nScholar Google https://scholar.google.es/citations?user=G1ks9nIAAAAJ&hl=en \nResearchGate https://www.researchgate.net/profile/Carlos_Travieso",institutionString:null,institution:{name:"University of Las Palmas de Gran Canaria",institutionURL:null,country:{name:"Spain"}}},editorTwo:null,editorThree:null},{id:"23",title:"Computational Neuroscience",coverUrl:"https://cdn.intechopen.com/series_topics/covers/23.jpg",isOpenForSubmission:!0,editor:{id:"14004",title:"Dr.",name:"Magnus",middleName:null,surname:"Johnsson",slug:"magnus-johnsson",fullName:"Magnus Johnsson",profilePictureURL:"https://mts.intechopen.com/storage/users/14004/images/system/14004.png",biography:"Dr Magnus Johnsson is a cross-disciplinary scientist, lecturer, scientific editor and AI/machine learning consultant from Sweden. \n\nHe is currently at Malmö University in Sweden, but also held positions at Lund University in Sweden and at Moscow Engineering Physics Institute. \nHe holds editorial positions at several international scientific journals and has served as a scientific editor for books and special journal issues. \nHis research interests are wide and include, but are not limited to, autonomous systems, computer modeling, artificial neural networks, artificial intelligence, cognitive neuroscience, cognitive robotics, cognitive architectures, cognitive aids and the philosophy of mind. \n\nDr. Johnsson has experience from working in the industry and he has a keen interest in the application of neural networks and artificial intelligence to fields like industry, finance, and medicine. \n\nWeb page: www.magnusjohnsson.se",institutionString:null,institution:{name:"Malmö University",institutionURL:null,country:{name:"Sweden"}}},editorTwo:null,editorThree:null},{id:"24",title:"Computer Vision",coverUrl:"https://cdn.intechopen.com/series_topics/covers/24.jpg",isOpenForSubmission:!0,editor:{id:"294154",title:"Prof.",name:"George",middleName:null,surname:"Papakostas",slug:"george-papakostas",fullName:"George Papakostas",profilePictureURL:"https://s3.us-east-1.amazonaws.com/intech-files/0030O00002hYaGbQAK/Profile_Picture_1624519712088",biography:"George A. Papakostas has received a diploma in Electrical and Computer Engineering in 1999 and the M.Sc. and Ph.D. degrees in Electrical and Computer Engineering in 2002 and 2007, respectively, from the Democritus University of Thrace (DUTH), Greece. Dr. Papakostas serves as a Tenured Full Professor at the Department of Computer Science, International Hellenic University, Greece. Dr. Papakostas has 10 years of experience in large-scale systems design as a senior software engineer and technical manager, and 20 years of research experience in the field of Artificial Intelligence. Currently, he is the Head of the “Visual Computing” division of HUman-MAchines INteraction Laboratory (HUMAIN-Lab) and the Director of the MPhil program “Advanced Technologies in Informatics and Computers” hosted by the Department of Computer Science, International Hellenic University. He has (co)authored more than 150 publications in indexed journals, international conferences and book chapters, 1 book (in Greek), 3 edited books, and 5 journal special issues. His publications have more than 2100 citations with h-index 27 (GoogleScholar). His research interests include computer/machine vision, machine learning, pattern recognition, computational intelligence. \nDr. Papakostas served as a reviewer in numerous journals, as a program\ncommittee member in international conferences and he is a member of the IAENG, MIR Labs, EUCogIII, INSTICC and the Technical Chamber of Greece (TEE).",institutionString:null,institution:{name:"International Hellenic University",institutionURL:null,country:{name:"Greece"}}},editorTwo:null,editorThree:null},{id:"25",title:"Evolutionary Computation",coverUrl:"https://cdn.intechopen.com/series_topics/covers/25.jpg",isOpenForSubmission:!0,editor:{id:"136112",title:"Dr.",name:"Sebastian",middleName:null,surname:"Ventura Soto",slug:"sebastian-ventura-soto",fullName:"Sebastian Ventura Soto",profilePictureURL:"https://mts.intechopen.com/storage/users/136112/images/system/136112.png",biography:"Sebastian Ventura is a Spanish researcher, a full professor with the Department of Computer Science and Numerical Analysis, University of Córdoba. Dr Ventura also holds the positions of Affiliated Professor at Virginia Commonwealth University (Richmond, USA) and Distinguished Adjunct Professor at King Abdulaziz University (Jeddah, Saudi Arabia). Additionally, he is deputy director of the Andalusian Research Institute in Data Science and Computational Intelligence (DaSCI) and heads the Knowledge Discovery and Intelligent Systems Research Laboratory. He has published more than ten books and over 300 articles in journals and scientific conferences. Currently, his work has received over 18,000 citations according to Google Scholar, including more than 2200 citations in 2020. In the last five years, he has published more than 60 papers in international journals indexed in the JCR (around 70% of them belonging to first quartile journals) and he has edited some Springer books “Supervised Descriptive Pattern Mining” (2018), “Multiple Instance Learning - Foundations and Algorithms” (2016), and “Pattern Mining with Evolutionary Algorithms” (2016). He has also been involved in more than 20 research projects supported by the Spanish and Andalusian governments and the European Union. He currently belongs to the editorial board of PeerJ Computer Science, Information Fusion and Engineering Applications of Artificial Intelligence journals, being also associate editor of Applied Computational Intelligence and Soft Computing and IEEE Transactions on Cybernetics. Finally, he is editor-in-chief of Progress in Artificial Intelligence. He is a Senior Member of the IEEE Computer, the IEEE Computational Intelligence, and the IEEE Systems, Man, and Cybernetics Societies, and the Association of Computing Machinery (ACM). Finally, his main research interests include data science, computational intelligence, and their applications.",institutionString:null,institution:{name:"University of Córdoba",institutionURL:null,country:{name:"Spain"}}},editorTwo:null,editorThree:null},{id:"26",title:"Machine Learning and Data Mining",coverUrl:"https://cdn.intechopen.com/series_topics/covers/26.jpg",isOpenForSubmission:!0,editor:{id:"24555",title:"Dr.",name:"Marco Antonio",middleName:null,surname:"Aceves Fernandez",slug:"marco-antonio-aceves-fernandez",fullName:"Marco Antonio Aceves Fernandez",profilePictureURL:"https://mts.intechopen.com/storage/users/24555/images/system/24555.jpg",biography:"Dr. Marco Antonio Aceves Fernandez obtained his B.Sc. (Eng.) in Telematics from the Universidad de Colima, Mexico. He obtained both his M.Sc. and Ph.D. from the University of Liverpool, England, in the field of Intelligent Systems. He is a full professor at the Universidad Autonoma de Queretaro, Mexico, and a member of the National System of Researchers (SNI) since 2009. Dr. Aceves Fernandez has published more than 80 research papers as well as a number of book chapters and congress papers. He has contributed in more than 20 funded research projects, both academic and industrial, in the area of artificial intelligence, ranging from environmental, biomedical, automotive, aviation, consumer, and robotics to other applications. He is also a honorary president at the National Association of Embedded Systems (AMESE), a senior member of the IEEE, and a board member of many institutions. His research interests include intelligent and embedded systems.",institutionString:"Universidad Autonoma de Queretaro",institution:{name:"Autonomous University of Queretaro",institutionURL:null,country:{name:"Mexico"}}},editorTwo:null,editorThree:null},{id:"27",title:"Multi-Agent Systems",coverUrl:"https://cdn.intechopen.com/series_topics/covers/27.jpg",isOpenForSubmission:!0,editor:{id:"148497",title:"Dr.",name:"Mehmet",middleName:"Emin",surname:"Aydin",slug:"mehmet-aydin",fullName:"Mehmet Aydin",profilePictureURL:"https://mts.intechopen.com/storage/users/148497/images/system/148497.jpg",biography:"Dr. Mehmet Emin Aydin is a Senior Lecturer with the Department of Computer Science and Creative Technology, the University of the West of England, Bristol, UK. His research interests include swarm intelligence, parallel and distributed metaheuristics, machine learning, intelligent agents and multi-agent systems, resource planning, scheduling and optimization, combinatorial optimization. Dr. Aydin is currently a Fellow of Higher Education Academy, UK, a member of EPSRC College, a senior member of IEEE and a senior member of ACM. In addition to being a member of advisory committees of many international conferences, he is an Editorial Board Member of various peer-reviewed international journals. He has served as guest editor for a number of special issues of peer-reviewed international journals.",institutionString:null,institution:{name:"University of the West of England",institutionURL:null,country:{name:"United Kingdom"}}},editorTwo:null,editorThree:null}]},overviewPageOFChapters:{paginationCount:19,paginationItems:[{id:"82196",title:"Multi-Features Assisted Age Invariant Face Recognition and Retrieval Using CNN with Scale Invariant Heat Kernel Signature",doi:"10.5772/intechopen.104944",signatures:"Kamarajugadda Kishore Kumar and Movva Pavani",slug:"multi-features-assisted-age-invariant-face-recognition-and-retrieval-using-cnn-with-scale-invariant-",totalDownloads:6,totalCrossrefCites:0,totalDimensionsCites:0,authors:null,book:{title:"Pattern Recognition - New Insights",coverURL:"https://cdn.intechopen.com/books/images_new/11442.jpg",subseries:{id:"26",title:"Machine Learning and Data Mining"}}},{id:"82063",title:"Evaluating Similarities and Differences between Machine Learning and Traditional Statistical Modeling in Healthcare Analytics",doi:"10.5772/intechopen.105116",signatures:"Michele Bennett, Ewa J. Kleczyk, Karin Hayes and Rajesh Mehta",slug:"evaluating-similarities-and-differences-between-machine-learning-and-traditional-statistical-modelin",totalDownloads:6,totalCrossrefCites:0,totalDimensionsCites:0,authors:null,book:{title:"Machine Learning and Data Mining - Annual Volume 2022",coverURL:"https://cdn.intechopen.com/books/images_new/11422.jpg",subseries:{id:"26",title:"Machine Learning and Data Mining"}}},{id:"81791",title:"Self-Supervised Contrastive Representation Learning in Computer Vision",doi:"10.5772/intechopen.104785",signatures:"Yalin Bastanlar and Semih Orhan",slug:"self-supervised-contrastive-representation-learning-in-computer-vision",totalDownloads:25,totalCrossrefCites:0,totalDimensionsCites:0,authors:null,book:{title:"Pattern Recognition - New Insights",coverURL:"https://cdn.intechopen.com/books/images_new/11442.jpg",subseries:{id:"26",title:"Machine Learning and Data Mining"}}},{id:"79345",title:"Application of Jump Diffusion Models in Insurance Claim Estimation",doi:"10.5772/intechopen.99853",signatures:"Leonard Mushunje, Chiedza Elvina Mashiri, Edina Chandiwana and Maxwell Mashasha",slug:"application-of-jump-diffusion-models-in-insurance-claim-estimation-1",totalDownloads:8,totalCrossrefCites:0,totalDimensionsCites:0,authors:null,book:{title:"Data Clustering",coverURL:"https://cdn.intechopen.com/books/images_new/10820.jpg",subseries:{id:"26",title:"Machine Learning and Data Mining"}}}]},overviewPagePublishedBooks:{paginationCount:9,paginationItems:[{type:"book",id:"7723",title:"Artificial Intelligence",subtitle:"Applications in Medicine and Biology",coverURL:"https://cdn.intechopen.com/books/images_new/7723.jpg",slug:"artificial-intelligence-applications-in-medicine-and-biology",publishedDate:"July 31st 2019",editedByType:"Edited by",bookSignature:"Marco Antonio Aceves-Fernandez",hash:"a3852659e727f95c98c740ed98146011",volumeInSeries:1,fullTitle:"Artificial Intelligence - Applications in Medicine and Biology",editors:[{id:"24555",title:"Dr.",name:"Marco Antonio",middleName:null,surname:"Aceves Fernandez",slug:"marco-antonio-aceves-fernandez",fullName:"Marco Antonio Aceves Fernandez",profilePictureURL:"https://mts.intechopen.com/storage/users/24555/images/system/24555.jpg",biography:"Dr. Marco Antonio Aceves Fernandez obtained his B.Sc. (Eng.) in Telematics from the Universidad de Colima, Mexico. He obtained both his M.Sc. and Ph.D. from the University of Liverpool, England, in the field of Intelligent Systems. He is a full professor at the Universidad Autonoma de Queretaro, Mexico, and a member of the National System of Researchers (SNI) since 2009. Dr. Aceves Fernandez has published more than 80 research papers as well as a number of book chapters and congress papers. He has contributed in more than 20 funded research projects, both academic and industrial, in the area of artificial intelligence, ranging from environmental, biomedical, automotive, aviation, consumer, and robotics to other applications. He is also a honorary president at the National Association of Embedded Systems (AMESE), a senior member of the IEEE, and a board member of many institutions. His research interests include intelligent and embedded systems.",institutionString:"Universidad Autonoma de Queretaro",institution:{name:"Autonomous University of Queretaro",institutionURL:null,country:{name:"Mexico"}}}]},{type:"book",id:"7726",title:"Swarm Intelligence",subtitle:"Recent Advances, New Perspectives and Applications",coverURL:"https://cdn.intechopen.com/books/images_new/7726.jpg",slug:"swarm-intelligence-recent-advances-new-perspectives-and-applications",publishedDate:"December 4th 2019",editedByType:"Edited by",bookSignature:"Javier Del Ser, Esther Villar and Eneko Osaba",hash:"e7ea7e74ce7a7a8e5359629e07c68d31",volumeInSeries:2,fullTitle:"Swarm Intelligence - Recent Advances, New Perspectives and Applications",editors:[{id:"49813",title:"Dr.",name:"Javier",middleName:null,surname:"Del Ser",slug:"javier-del-ser",fullName:"Javier Del Ser",profilePictureURL:"https://mts.intechopen.com/storage/users/49813/images/system/49813.png",biography:"Prof. Dr. Javier Del Ser received his first PhD in Telecommunication Engineering (Cum Laude) from the University of Navarra, Spain, in 2006, and a second PhD in Computational Intelligence (Summa Cum Laude) from the University of Alcala, Spain, in 2013. He is currently a principal researcher in data analytics and optimisation at TECNALIA (Spain), a visiting fellow at the Basque Center for Applied Mathematics (BCAM) and a part-time lecturer at the University of the Basque Country (UPV/EHU). His research interests gravitate on the use of descriptive, prescriptive and predictive algorithms for data mining and optimization in a diverse range of application fields such as Energy, Transport, Telecommunications, Health and Industry, among others. In these fields he has published more than 240 articles, co-supervised 8 Ph.D. theses, edited 6 books, coauthored 7 patents and participated/led more than 40 research projects. He is a Senior Member of the IEEE, and a recipient of the Biscay Talent prize for his academic career.",institutionString:"Tecnalia Research & Innovation",institution:null}]},{type:"book",id:"7656",title:"Fuzzy Logic",subtitle:null,coverURL:"https://cdn.intechopen.com/books/images_new/7656.jpg",slug:"fuzzy-logic",publishedDate:"February 5th 2020",editedByType:"Edited by",bookSignature:"Constantin Volosencu",hash:"54f092d4ffe0abf5e4172a80025019bc",volumeInSeries:3,fullTitle:"Fuzzy Logic",editors:[{id:"1063",title:"Prof.",name:"Constantin",middleName:null,surname:"Volosencu",slug:"constantin-volosencu",fullName:"Constantin Volosencu",profilePictureURL:"https://mts.intechopen.com/storage/users/1063/images/system/1063.png",biography:"Prof. Dr. Constantin Voloşencu graduated as an engineer from\nPolitehnica University of Timișoara, Romania, where he also\nobtained a doctorate degree. He is currently a full professor in\nthe Department of Automation and Applied Informatics at the\nsame university. Dr. Voloşencu is the author of ten books, seven\nbook chapters, and more than 160 papers published in journals\nand conference proceedings. He has also edited twelve books and\nhas twenty-seven patents to his name. He is a manager of research grants, editor in\nchief and member of international journal editorial boards, a former plenary speaker, a member of scientific committees, and chair at international conferences. His\nresearch is in the fields of control systems, control of electric drives, fuzzy control\nsystems, neural network applications, fault detection and diagnosis, sensor network\napplications, monitoring of distributed parameter systems, and power ultrasound\napplications. He has developed automation equipment for machine tools, spooling\nmachines, high-power ultrasound processes, and more.",institutionString:"Polytechnic University of Timişoara",institution:{name:"Polytechnic University of Timişoara",institutionURL:null,country:{name:"Romania"}}}]},{type:"book",id:"9963",title:"Advances and Applications in Deep Learning",subtitle:null,coverURL:"https://cdn.intechopen.com/books/images_new/9963.jpg",slug:"advances-and-applications-in-deep-learning",publishedDate:"December 9th 2020",editedByType:"Edited by",bookSignature:"Marco Antonio Aceves-Fernandez",hash:"0d51ba46f22e55cb89140f60d86a071e",volumeInSeries:4,fullTitle:"Advances and Applications in Deep Learning",editors:[{id:"24555",title:"Dr.",name:"Marco Antonio",middleName:null,surname:"Aceves Fernandez",slug:"marco-antonio-aceves-fernandez",fullName:"Marco Antonio Aceves Fernandez",profilePictureURL:"https://mts.intechopen.com/storage/users/24555/images/system/24555.jpg",biography:"Dr. Marco Antonio Aceves Fernandez obtained his B.Sc. (Eng.) in Telematics from the Universidad de Colima, Mexico. He obtained both his M.Sc. and Ph.D. from the University of Liverpool, England, in the field of Intelligent Systems. He is a full professor at the Universidad Autonoma de Queretaro, Mexico, and a member of the National System of Researchers (SNI) since 2009. Dr. Aceves Fernandez has published more than 80 research papers as well as a number of book chapters and congress papers. He has contributed in more than 20 funded research projects, both academic and industrial, in the area of artificial intelligence, ranging from environmental, biomedical, automotive, aviation, consumer, and robotics to other applications. He is also a honorary president at the National Association of Embedded Systems (AMESE), a senior member of the IEEE, and a board member of many institutions. His research interests include intelligent and embedded systems.",institutionString:"Universidad Autonoma de Queretaro",institution:{name:"Autonomous University of Queretaro",institutionURL:null,country:{name:"Mexico"}}}]}]},openForSubmissionBooks:{},onlineFirstChapters:{},subseriesFiltersForOFChapters:[],publishedBooks:{},subseriesFiltersForPublishedBooks:[],publicationYearFilters:[],authors:{}},subseries:{item:{},onlineFirstChapters:{},publishedBooks:{},testimonialsList:[]},submityourwork:{pteSeriesList:[],lsSeriesList:[],hsSeriesList:[],sshSeriesList:[],subseriesList:[],annualVolumeBook:{},thematicCollection:[],selectedSeries:null,selectedSubseries:null},seriesLanding:{item:null},libraryRecommendation:{success:null,errors:{},institutions:[]},route:{name:"chapter.detail",path:"/chapters/72165",hash:"",query:{},params:{id:"72165"},fullPath:"/chapters/72165",meta:{},from:{name:null,path:"/",hash:"",query:{},params:{},fullPath:"/",meta:{}}}},function(){var e;(e=document.currentScript||document.scripts[document.scripts.length-1]).parentNode.removeChild(e)}()