Narcotic effects and physical properties of some gases.
\r\n\tAnimal food additives are products used in animal nutrition for purposes of improving the quality of feed or to improve the animal’s performance and health. Other additives can be used to enhance digestibility or even flavour of feed materials. In addition, feed additives are known which improve the quality of compound feed production; consequently e.g. they improve the quality of the granulated mixed diet.
\r\n\r\n\tGenerally feed additives could be divided into five groups:
\r\n\t1.Technological additives which influence the technological aspects of the diet to improve its handling or hygiene characteristics.
\r\n\t2. Sensory additives which improve the palatability of a diet by stimulating appetite, usually through the effect these products have on the flavour or colour.
\r\n\t3. Nutritional additives, such additives are specific nutrient(s) required by the animal for optimal production.
\r\n\t4.Zootechnical additives which improve the nutrient status of the animal, not by providing specific nutrients, but by enabling more efficient use of the nutrients present in the diet, in other words, it increases the efficiency of production.
\r\n\t5. In poultry nutrition: Coccidiostats and Histomonostats which widely used to control intestinal health of poultry through direct effects on the parasitic organism concerned.
\r\n\tThe aim of the book is to present the impact of the most important feed additives on the animal production, to demonstrate their mode of action, to show their effect on intermediate metabolism and heath status of livestock and to suggest how to use the different feed additives in animal nutrition to produce high quality and safety animal origin foodstuffs for human consumer.
",isbn:"978-1-83969-404-2",printIsbn:"978-1-83969-403-5",pdfIsbn:"978-1-83969-405-9",doi:null,price:0,priceEur:0,priceUsd:0,slug:null,numberOfPages:0,isOpenForSubmission:!1,hash:"8ffe43a82ac48b309abc3632bbf3efd0",bookSignature:"Prof. László Babinszky",publishedDate:null,coverURL:"https://cdn.intechopen.com/books/images_new/10496.jpg",keywords:"Technological Feed Additives, Feed Industry, Quality of Compound Feed, Non-Antibiotic Growth Promoter, Product Quality, Additive Enzymes, Digestibility of Nutrients, NSP Enzymes, Farm Animals, Livestock, Immunity, Microbiome",numberOfDownloads:null,numberOfWosCitations:0,numberOfCrossrefCitations:null,numberOfDimensionsCitations:null,numberOfTotalCitations:null,isAvailableForWebshopOrdering:!0,dateEndFirstStepPublish:"November 24th 2020",dateEndSecondStepPublish:"December 22nd 2020",dateEndThirdStepPublish:"February 20th 2021",dateEndFourthStepPublish:"May 11th 2021",dateEndFifthStepPublish:"July 10th 2021",remainingDaysToSecondStep:"2 months",secondStepPassed:!0,currentStepOfPublishingProcess:4,editedByType:null,kuFlag:!1,biosketch:"Professor Emeritus from the University of Debrecen, Hungary who authored 297 publications (papers, book chapters) and edited 3 books. Member of various committees and chairman of the World Conference of Innovative Animal Nutrition and Feeding (WIANF).",coeditorOneBiosketch:null,coeditorTwoBiosketch:null,coeditorThreeBiosketch:null,coeditorFourBiosketch:null,coeditorFiveBiosketch:null,editors:[{id:"53998",title:"Prof.",name:"László",middleName:null,surname:"Babinszky",slug:"laszlo-babinszky",fullName:"László Babinszky",profilePictureURL:"https://mts.intechopen.com/storage/users/53998/images/system/53998.jpg",biography:"László Babinszky is Professor Emeritus of animal nutrition at the University of Debrecen, Hungary. From 1984 to 1985 he worked at the Agricultural University in Wageningen and in the Institute for Livestock Feeding and Nutrition in Lelystad (the Netherlands). He also worked at the Agricultural University of Vienna in the Institute for Animal Breeding and Nutrition (Austria) and in the Oscar Kellner Research Institute in Rostock (Germany). From 1988 to 1992, he worked in the Department of Animal Nutrition (Agricultural University in Wageningen). In 1992 he obtained a PhD degree in animal nutrition from the University of Wageningen.He has authored 297 publications (papers, book chapters). He edited 3 books and 14 international conference proceedings. His total number of citation is 407. \r\nHe is member of various committees e.g.: American Society of Animal Science (ASAS, USA); the editorial board of the Acta Agriculturae Scandinavica, Section A- Animal Science (Norway); KRMIVA, Journal of Animal Nutrition (Croatia), Austin Food Sciences (NJ, USA), E-Cronicon Nutrition (UK), SciTz Nutrition and Food Science (DE, USA), Journal of Medical Chemistry and Toxicology (NJ, USA), Current Research in Food Technology and Nutritional Sciences (USA). 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The inert gas, which is nitrogen, encountered with problems in sports equipped divers. For this reason, what is known as inert gas narcosis in diving medicine can be called direct nitrogen narcosis in this chapter [2].
Nitrogen narcosis, depth poisoning, depth drunkenness, nitrogen narcosis is also known by other names [1]. The nitrogen that the two nitrogen molecules bind with three bonds between them constitutes 79% of the air we breathe [3]. The increase of the nitrogen pressure negatively affects the central nervous system (CNS). It is usually seen at depths of more than 30 m [4]. Nitrogen narcosis is characterized by decreased intellectual function and decreased neuromuscular transmission performance, a tendency to laugh, decreased attention and decision-making, emotional state, and impaired behavior. Nitrogen narcosis does not cause permanent damage to the body, but mental and motor deterioration can lead to serious problems in the underwater [2]. These effects increase as the partial pressure of nitrogen increases, but it is not related to the time remaining at the same depth [5]. These changes have been seen for centuries as they are known when diving with compressed air due to nitrogen pressure. Other inert gases with similar effects have been described (neon, argon, krypton, xenon, and hydrogen) [1].
In diving with compressed air, nitrogen narcosis is the most important factor limiting depth. When it is necessary to work deeper than 40–50 m, it is necessary to get help from gas with less narcotic effect such as helium. Nitrogen narcosis is responsible for most of the dive accidents and dive-related deaths.
The cause of acute toxicity of hyperbaric oxygen therapy is related to oxygen partial pressure [6]. Although oxygen is a necessary gas to survive, oxygen can show toxic effects at high partial pressures and long-term exposures. Oxygen poisoning can be seen in long-term oxygen therapy in intensive care, in closed or semi-closed circuit diving, in saturation dives, on decompressions on the surface, in recompression and hyperbaric oxygen therapy [7].
Oxygen intoxication is caused by reactions between free oxygen radicals and cell components [8]. Gamma amino butyric acid (GABA) has frequently been studied in studies conducted in this regard [9]. Excess oxygen causes the generation of uncontrolled stimuli in the central nervous system by reducing GABA outflows [8]. It is thought that seizures developing in 3 ATA and above hyperbaric oxygen therapy are related to this [10].
The poisoning caused by air inhalation in a high-pressure environment was first described by Junod in 1835 [2]. In 1861, Green made a dive with divers with 48 m of compressed air, observing that the divers developed to sleep, their decision-making powers were impaired, and they saw hallucinations. Paul Bert stated that divers were poisoned at high depths in 1878. In 1903, Hill and McLeod described the intellectual functions of tunnel workers as inadequate at 5.5 ATA pressure. In 1930, Damant reported that memory problems had developed in 10 ATA. In 1932, Hill and Phillips thought these effects could be claustrophobic or psychological. According to a report by the British Navy in 1933, the section entitled “Loss of semi-consciousness” states that divers who have dived at 60–106 m have received hand signals sent to them, but no one remembers it when it comes to the surface [1].
In 1935, Behnke and his colleagues described the currently accepted theory of nitrogen narcosis. Narcosis is caused by an increase in partial pressure of nitrogen, which is an inert gas. The enthusiasm (euphoria) developed at the 30-m compressed air dive; accompany slowing of the mental capacity and deterioration of the nerve-muscle communication. Attention was paid to the fact that this effect was further enhanced by the depth of the dive. At diving, drowsiness occurs at 90 m and loss of consciousness occurs at 90–140 m. Behnke and Yarbrough reported that this effect could be reduced by replacing nitrogen to helium in the dive inhalation gas [1].
According to the Deep Dive Committee Report in 1933, this was also related to the accumulation of carbon dioxide during the dive. In 1941, Case and Haldane showed that, when carbon dioxide was mixed in the diving air, the mental symptoms became more intense. However, In some studies clearly denied the carbon dioxide theory. They showed evidence of narcotic symptoms despite normal levels of carbon dioxide in the alveolar air. In subsequent years of studies has been found that direct anesthesia is responsible for the nitrogen between the air and dive with helium/oxygen [2].
It is thought that the mechanism of nitrogen narcosis is the same as general anesthesia with volatile gases. All inert gases that produce anesthetic effects behave in the same way. These gases are composed of simple molecules with no structural properties and do not show chemical changes in the body [3].
Many researchers have attempted to understand the physical behavior of these gases and have found a close relationship with the oil dissolution feature. According to the Meyer-Overton hypothesis, there is a parallel between the dissolution of anesthetics in oil and potency of the narcotic effect. It stated that when the gases pass through cell oils at a certain molar concentration, they will show an effect of narcosis. In this case, the inert gas molecule affects the cell membrane function in the brain. However, there are some discrepancies in terms of the physical properties of the inert gases and their narcotics abilities (Table 1). For example, argon is two times more narcotic than nitrogen. However, their fat/water solubility ratios are similar. However, despite all these incompatibilities, narcotic behavior is parallel to physical characteristics in general [5].
Gases | Molecular weight | Volume | Solubility in oil at 37°C | Separation coefficient (oil:water) | narcotic effect |
---|---|---|---|---|---|
Helium | 4 | 2.370 | 0.015 | 1.70 | 0.23 |
Neon | 20 | 1.709 | 0.019 | 2.07 | 0.28 |
Hydrogen | 2 | 2.661 | 0.040 | 3.10 | 0.55 |
Nitrogen | 28 | 3.913 | 0.067 | 5.25 | 1.00 |
Argon | 40 | 3.218 | 0.140 | 5.32 | 2.33 |
Krypton | 83.7 | 3.978 | 0.430 | 9.60 | 7.14 |
Xenon | 131.3 | 3.105 | 1.700 | 20.00 | 25.64 |
Narcotic effects and physical properties of some gases.
According to Henry’s Law, as soon as the partial pressure of nitrogen increases, it begins to dissolve more in the body and in the plasma. Nitrogen cannot be used by the body like oxygen. When we breathe compressed air during diving, many molecules enter our bodies and quickly dissolve in our bodies due to the height of the environmental pressure. When we dive 15 m sea water, the nitrogen partial pressure will double up. With the increase in depth, the narcosis signs will begin to appear. As is known, anesthetic symptoms occur when diving is 15 m or more, and we briefly explain it with the Martini Act (Figure 1) [4].
Martini Yasası.
The dissolution hypothesis in oil has been tried to be understood by the concept of critical volume. Here, in order to develop the effect of narcosis, the inert gas must affect on the fat part of cell membrane to swell. In human studies, it has been confirmed that gas has a positive correlation with oil solubility by developing slightly to moderate narcosis.
In general, although these physical theories refer to the fatty part of the cell membrane, it has been shown that this narcotic effect is due to specific receptors and influences synaptic transmission. Some studies have shown that cell membranes are resistant to narcotics and cell membrane proteins and lipoproteins are responsible for this.
Many studies have focused on the cause of stimulation in the central nervous system. Stimulant-inhibitory synapses, molecules, and receptors are the basis of this effect. Among them, gamma-amyno butiric acid (GABA) is the most important inhibitory molecule. GABA is an important inhibitory neurotransmitter which made from glutamine after a series of reactions in the central nervous system (Figure 2). GABA receptors have been shown to be responsible for the formation of nitrogen narcosis [8].
GABA and dopamine metabolism.
The most important of the stimulating molecules is dopamine. Nitrogen accumulation increases the levels of dopamine, causing cortex and thalamus stimulation, which are brain regions (Figure 3). Nitrogen accumulation causes a reversal of uptake and an increase in dopaminergic levels. This situation leads to stimulation in the thalamus and striatum, which is the inhibitor center. This explains some neuromuscular disorders belonging to nitrogen narcosis [9].
Dopamine-induced thalamus and cortex.
In order to explain the acute toxic effects of hyperbaric oxygen therapy, it is necessary to focus on enzyme metabolism. High pO2 values disrupt the function of enzymes, especially those containing sulfurized sulfhydryl groups. This effect of free oxygen radicals is widely accepted [7].
For example, the antioxidant defense system in the body can resist life to the oxygen pressure normally found in atmospheric air, or even slightly more. This value is 0.4–0.5 atmospheres (1 ATA at sea level, oxygen is approximately one-fifth in the air). Now, let’s take a 30-m dive with air. In this case, total pressure will be 4 ATA, and if the oxygen forming partial pressure of air is pO2 = 0.8 ATA, this value exceeds the antioxidant defense system of the body. The body is damaged acutely by oxygen at a depth of 30 m for a long time.
• Myer-Overton: when inert gas is dissolved in the nervous system, the inert gas has an inhibitory effect on the nervous system.
• Quastel-Metabolic: at high pressure, inert gas disrupts cell metabolism. These sensitive cells are mostly found in the brain. The cells, which are consciousness formation, are the first to be affected.
• Clathrate: under pressure nitrogen creates clathrate with protein and water. This formation disrupts neural transmission.
• Iceberg: when nitrogen gas dissolves in water, it creates molecules called icebergs. The iceberg also prevents the transmission of the nervous system like the same clathrate [4].
There are many variables that affect the susceptibility of the person to nitrogen narcosis. Diving health, deep diving experience, working conditions, environmental conditions are some of these. As the depth increases, the diver starts sign of the suppressing. Thinking problems, deterioration of time perception, deterioration of decision-making, memory problems, motor and mental functions, and the prolongation of reaction time are some of these [5].
When the diver starts to exit, the symptoms disappear quickly; sometimes, it does not remember what you are doing underwater during nitrogen narcosis.
There is no direct pathological change to acutely CNS oxygen poisoning in humans. In animal experiments, tissue death was demonstrated in the nervous system. Serious exposures can cause damage to the brain and spinal cord in the spinal cord. Even a 30-min dive with 4 ATA pure oxygen (30 m) can cause structural changes in the gray matter in the spine of front horn [7].
The mechanism of CNS oxygen poisoning is not fully known. Oxygen is believed to have evolved by the increase of pO2 and the free oxygen derivatives affecting the CNS metabolism. As a rule, poisoning is seen when exposed to pO2 pressure on 2 ATA and above [6].
Oxygen poisoning occurs more rapidly as the pO2 pressure increases. According to Clark and Lambertsen’s work; pO2 1.7 ATA for 7 h, 1.8 ATA for 3 h, 2 ATA for 50 min and 3 ATA for 30 min showed signs of MSS poisoning [7].
Signs and findings are described in a wide range of fans. Nausea, vomiting, dizziness, ringing in the ears, incoordination, tunnel vision, irritability, pallor, sweating, heart rate slowing (bradycardia), lips, and hands twitching, eyes widening of the baby, hiccups, to remember the recent past, hallucination, confusion (confusion) are chief of the signs and findings. However, the most dramatic of these is the seizure, namely the convulsion. It is typical that consciousness is closed during convulsion [7].
The most common finding is a face twenty in the oxygen pressure on 2 ATA. The sign of paleness in the face is due to hyperoxia-induced vasoconstriction. Similarly, the loss of sensation in the fingers is the result of vasoconstriction [9].
Even though the depth is the same, being in the water reduces the resistance to oxygen poisoning considerably compared to being in dry air in the pressure chamber. Water and diving stress increase the susceptibility to oxygen poisoning. Also underwater, the signs mentioned above cannot be noticed, but the divers are noticed that they are poisoned when they have convulsions. Convulsions underwater are dangerous because they can lead to suffocation or barotrauma. Therefore, many authorities have determined the maximum depth of pure oxygen diving underwater to be 10 m. Other causes that reduce the threshold value of CNS poisoning are exercise, hypothermia, increased calm carbon dioxide levels [10].
Facial twitch usually results in convulsions. During convulsion, all body stimuli develop and the tonic phase called full contraction begins. During this time, breathing is interrupted. The tonic phase usually lasts 30 s and is accompanied by loss of consciousness. This period approximately takes 1 min, followed by the head, neck, trunk, and legs in large contraction followed by clonic phase. After the clonic phase, the contractures decrease and the respiration starts with hyperventilation, and after a while consciousness comes back. The diver does not remember any part of the event. The concentration of carbon dioxide has increased because of being held breath during the convulsion. However, contrary to normal epilepsy patients, there is no reduction in oxygen reaching the CNS during respiration, as oxygen breathes at high pressure before the diver seizure [11].
When toxic effects of oxygen occur, it is necessary to reduce the partial pressure of oxygen inhaled immediately. In the pressure chamber, it is necessary to remove the oxygen mask or reduce the pressure. Diving depth must be reduced during diving. The diver must be brought to the surface safely. Reducing the pressure in the pressure chamber or rising in the dive is accompanied by lung barotrauma risk because it is kept breath during the seizure. After first aid, barotrauma should be controlled by drawing a chest radiograph [8].
Although the sensitivity of nitrogen narcosis is quite different from person to person, all the divers who dive at depths of 60–70 m demonstrate clinical signs of nitrogen narcosis. Firstly, high cognitive functions are affected. The main symptoms of these are judgments, decision-making, close memory, learning, concentration, and attention. The diver may feel very good and can over-confidence himself as a light alcohol drinker. Along with increased nitrogen partial pressure at higher pressures, diminished hand strength and progressive deterioration of mental performance, intellectual fixation, hallucinations, and finally lethargy/blunting and coma. Some divers may experience a disorder in the form of tunnel vision, but they cannot be aware of the danger because of the perception disorder [1].
Tension, cold, tiredness, soothing medicines, alcohol and medications that affect the central nervous system may cause exacerbated narcosis. The effects of nitrogen narcosis are likened to the intake of alcohol. Alcohol and nitrogen narcosis symptoms are often associated, especially as enthusiasm and motor coordination develop. Even with a somewhat sarcastic approach, the nitrogen narcosis is assessed with a criterion called the Martini law. According to this law, every 50 feet of depth leads to equivalent effects on a glass of martin. Enthusiasm, joy, laughter at 10–30 m; increased self-confidence, fixed idea at 30–50 m; loquaciousness, dizziness, hysterical seizures at 50–70 m; delayed response to stimuli, loss of concentration, mood swings at 70–90 m; hallucinations, and loss of consciousness develop over 90 m [3].
The nitrogen narcosis effect is affected within a few minutes when you descend into depth and is not related to the dive time. Initially, fast diving increases the anesthetic effect, but this effect is rapidly returned when ascending to surface [3].
Other causes that increase the degree of nitrogen narcosis need to be considered. Alcohol, fatigue, tension, cold, oxygen, and carbon dioxide changes increase the effect of narcosis, limiting the diver’s ability in underwater. Experimental studies have shown that alcohol and underwater exercises increase the effect of narcosis. Increased carbon dioxide and nitrogen pressurized diver have been shown to reduce performance. In certain periods and long dives, divers can develop some adaptations against to the narcotic effect of nitrogen [4].
Despite the fact that it is not a realistic and appropriate guide for the formation of nitrogen narcosis, scientific studies are carrying out. It is useful to monitor the performance of the diver in simple tasks, tests that can be reached to narcotic sensitive individuals, the use of low narcotic gas mixtures during diving and reduction of other factors affecting narcosis in depth, achieve a safe dive operation without encountering this effect. Since these tests are not used in the selection of the sportive diver or mixed gas is not used in sportive diving, the depth of the dive is reduced or terminated when anesthesia develops. It is also necessary to pay attention to the other factors, which increase the influence of nitrogen narcosis mentioned in the previous paragraph. The effects of nitrogen narcosis are roughly measured by two methods. First of these, the behavioral approach measures the fulfillment of the assigned task, which measures arithmetic, memory, and handicraft. The other is a measure of some neurophysiological parameters [5].
Behavioral approach
The behavioral approach is examined in three main categories: cognitive ability, reaction time, and skill. Cognitive competence is the most frequently affected by nitrogen narcosis, but skill competence is least affected.
In this study, conducted on open water divers, anxiety, and a decrease in the success of the task were observed. The anxiety status was determined by measuring plasma cortisol and urine noradrenaline. The intellectual function, arithmetic, and memory capacity of open dives were found lower than the coastal diving in open sea diving. The cause of this decline is depending on stress of the open sea diving.
The effect of nitrogen narcosis on behavior has been studied by psychologists. They defined this as a slow process model. In this model, they saw slowed activation with anesthesia, increased reactivation duration. The least affected hand is skill because less cognitive function is needed for skill.
Neurophysiological changes
Neurophysiological tests are needed to evaluate some subjective values, to achieve low performance and to provide objective evidence. These are the information that is obtained by drawing the electroencephalogram of the brain after diving with compressed air in the cabin. First, findings of high stimulation in the cortex of the brain have been reached. This situation includes voltage increases in the basal rhythm of the brain.
The measurement of the functions of the central nervous system can be done by examining the cortical potentials, evoked from the exposed inert gases in the brain. The low response to stimulus is an experimental measure of the effect of nitrogen narcosis.
When acute poisoning statements are made during treatment in the pressure chamber, the patient should be given air to breathe deeply. If necessary, the treatment table can be changed by the underwater physician. In case of unconsciousness, stomach contents should be prevented from escaping to the lungs (aspiration).
The first goal during convulsion is to prevent trauma [7]. The tongue should prevent the patient from biting the tongue during the seizure. It should be known that naturally depends on the dive, the lack of oxygen (hypoxia) does not occur. It is necessary to wait until the tonic phase of the convulsion is finished. Otherwise, the diver may be exposed to lung barotrauma.
If oxygen poisoning develops in the pressure chamber treatment;
Stop diving, remove the mask.
If convulsion develops, it will prevent damage to itself and its surroundings.
Tongue bite is blocked by attendance.
Enables hyperventilation with air in the pressure chamber.
The sedative drug can be started with the recommendation of the underwater physician.
If symptoms have disappeared after interruption of treatment within 15 minutes, it will be resumed from the same point of treatment.
If necessary proceed to non-deeper treatment tables.
The first intervention should be to prevent the diver from deeper to reduce the effect of anesthesia. The lifeguard must prevent the unconscious movements of the diver, such as removing the regulator from his mouth and holding his breath. He must think that the dive is like a dream, and he should try to go to ascend from the depth.
The diver must be closely followed when he comes out of the water. There is no treatment to be done when the anesthetic effect is passed. During close follow-up, hypoxic findings, drowning, sudden outbreaks, etc. should be considered and examined for secondary problems. The underwater physician should be consulted if such cases are found to be present.
When medications that prevent convulsions are used before the dive, the convulsion is under control, but cell damage is still present. This causes the diver to reach uncontrolled depths and be exposed to more toxic effects. The only safe approach is to make diving plans at depth limits. This limit depends on the partial pressure of the oxygen, the duration of the dive and environmental factors.
Underwater physicians test the candidates who are susceptible to CNS oxygen poisoning. The oxygen tolerance test can be done by oxygen breathing in the hyperbaric oxygen therapy device at 2.8 ATM for 30 min. Although this test is susceptible to positive ones, there is no clinical validity of the “oxygen tolerance test.” Tolerance can vary from person to person or from day to day in the same person [9].
In the simplest case, it is necessary to avoid high partial pressures of inert gases during diving. It is important to be aware of the circumstances of air diving and know that performance and decision-making authority will be affected at depths of over 40 m. In professional diving, it is necessary to use less narcotic gases such as helium to increase the depth of safe diving. It is known that the adaptation of the dive with the daily dives against nitrogen narcosis. Some studies have shown that although some personal adaptations can occur, reaction times do not benefit from repeated dives.
To prevent nitrogen narcosis, some mixed gases are used in professional dives. Diving is planned here by creating a mixture of oxygen with nitrogen, helium or helium/nitrogen. The aim here is to reduce the narcotic effect by reducing the partial pressure of the nitrogen. However, it is necessary to pay careful attention to oxygen poisoning since oxygen increases partial pressure in such diving. As helium increases heat transfer, divers must be careful against the hypothermic effect. Due to such effects, only professional divers are allowed to mix gas dives.
Amphetamines reduce the narcotic effect that causes the prolongation of the reaction period, so they are not used in diving. The diver should be aware of the risks in the underwater environment. Also, increase narcotic efficacy, drugs that suppress the central nervous system, such as alcohol and antihistamines. These drugs create a synergistic effect with nitrogen, accelerating the reduction of performance and decision-making.
When the symptoms disappear, and the diver feels ready, the dive may return. It should be noted here that nitrogen is a secondary health problem that will develop in a diver who is forced to exit during narcosis. If necessary, the diver should be re-examined [2].
In diving accidents, the treatment of hypoxic injuries is more important than oxygen poisoning. Therefore, priority should be given to the treatment of diving accidents. In the treatment of decompression, air or gas mixtures can be used in the pressure chamber to reduce the most toxic damage. Vitamin A, C, E, selenium, and so on to reduce oxygen poisoning. Antioxidant products can be used in hyperbaric oxygen therapy or before diving [7].
The educator has an unequivocal role in the education situation, that of facilitating learning. By and large, the extent of learning is influenced by the learning approach that is employed by the educator. Some educators are obsessed by the monological approach which has emphasis on the teacher-centred approach. The educator becomes more active than the learner. The monological approach is condemnable [1]. The approach is deemed vicious in terms of development of the disposition for life-long learning. The more virtuous approach to effective learning is active learning which shares a lot of virtues with the dialogical approach.
\nActive learning has been considered virtuous by academics in many nation states. There is the Chinese adage that emphasizes on active learning which reads, ‘I hear and I forget, I see and I remember, I do and I understand’. Active learning is critical in teacher education since without it there could be stagnation in the construction of knowledge. Some educators have a tendency of transmitting almost the same knowledge using the same mode that their educators transmitted to them. In such a situation, education becomes a means for the perpetuation of the status quo. The teacher education learners who are exposed to the active learning approach are likely to engage the learners they would have before them in active learning episodes.
\nThe purpose of this chapter is an exposition of discourses on the essence of active learning in teacher education. There are explications of the concepts and practices that are indispensable to active learning. The intended beneficiaries of active learning, the teacher education learners are always experiencing situations which are vicious and/or virtuous to active learning. In order to minimise speculations about the practices that promote or stifle development active learning, an empirical investigation was done with learners exposed to action research and traditional research. The interpretations of experiences of the learners are used as excerpts in corroboration of some standpoints in the discourses.
\nActive learning is an approach employed by the educator which actively engages the learners as participants in their learning. The learners who are active find learning more interesting and meaningful when new knowledge, skills and attitudes are contextualized to their previous experiences and what they are to experience in the immediate future. In active learning, experience is not about what happens to the learner but is concerned with what the learner does with what happens to him or her. The experience of the learner should always be given meaning by him or her through reflective thinking.
\nThe term ‘active learning was coined’ by Charles Bonwell and James Eison in 1991 in their seminal book entitled Active learning: Creating excitement in the classroom. In this book, active learning is considered to be the panacea to pedagogic and andragogic ills that emanate from monological, mis-educative techniques of traditional education. The traditional education techniques can be traced back to the 14th century. The then educators of the Medieval times were oratory and narrative of knowledge that were got from scarce resources. The modus operandi of learning of the then times was the taking of copious notes and memorizing information.
\nActive learning is informed by the constructivist philosophy which was advocated for by theorists like; Dewey, Vigotsky and Piaget. Constructivism focuses on constructing meaning from experiences when one reflects on the experiences. Thus in this context, active learning is a reflective activity which implores learners to learn how to learn to construct meaning and subsequently knowledge.
\nWithout guidance from constructivism, there could be rote learning as an approach that is employed by some teacher educators. The teacher educators are referred to as lecturers and they live to the label when they succumb to the narration sickness [1]. In the wake of constructivism that emphasizes on creation of knowledge, the educators should involve learners in active learning. The learners especially those at tertiary level should be considered to be responsible learners who can learn more meaningfully when they are actively involved rather than being exposed to passive listening and note taking. The learners should be engaged in higher-order thinking which entails reflective thinking.
\nThe education system of any nation state strives for the provision of authentic education which is concerned with human development in all the spheres of life. In many education systems, authentic education is obscured and thwarted by the craving for high paper education credentials which are acquired by memorization of stale knowledge. If this was the authentic yardstick for quality education, then the panacea to socio-economic and political problems could have been considered got. The criteria for high level of education should be concerned with wisdom to interact with one’s environment for the enhancement of societal development. The active interaction with the environment to give it meaning is critical for realisation of authentic education which involves the interpretation of experiences in order to acquire requisite knowledge, skills and attitudes for both personal and societal survival. One could have attained a high level of paper qualification but without a disposition and knowledge of learning how to learn to attain authentic education. The contradistinction of authentic education is illusory education which is characterised by the regurgitation of notes given by the ‘educator’ [2]. Such ‘education’ comes about through non-educative experiences and mis-educative experiences which are mal-educative experiences and are the antithesis of active learning [3].
\nThe involvement of the learners in the mal-educative experiences is reinforced by a defective education system. Some ‘educators’ perpetuate the mal-educative experiences by employing rote and ritualistic approaches to learning. In other words there is status quo in education whereby some ‘educators’ with ‘experience’ have developed some habits that define their interactions with the learners. They become resistant to change since anything that is new has the potential of throwing them in the zone of incompetence. For the newly ‘qualified’ teachers, there is a tendency that they interact with the learners in the same manner in which their ‘educators’ interacted with them. More so, the parents of the learners are sceptical about any education interactions that are radically different from what they experienced [4].
\nEducation that is hinged on the maintenance of the status quo alienates the learners from the realities of life and is not meaningful. Thus educators should be aware of that education which is meaningful accords the learner the freedom to intellectually and actively interact with the environment in order to interpret it. Such a model of education is democratic since it values the learners’ experiences in the creation of a collective body of knowledge about the environment [3]. When the learners are actively involved in the interpretation of the reality around them, there is authentic education [2]. In defining education, it is imperative to include the learners’ experiences. Thus education is the reconstruction or reorganization of experience which adds to the meaning of experience, and which increases one’s ability to direct the course of subsequent experience [5]. The reconstruction and reorganization of experiences are hinged on reflection which is about the processing of the meaning of experiences. Reflection is indispensable to interpretation of experiences. Thus Aldous Huxley postulate that experience is not what happens to an individual, it’s what the individual does with what happens to him or her [6]. The emphasis is on reflections on the experiences.
\nEducation that is meaningful is focused on the quality of experience and the reflections thereof. There are two closely intertwined principles which are interaction and continuity [5]. The principle of interaction is about the learner’s active involvement in learning when the learner gets inputs from the active interaction with the environment for the creation of knowledge. Interaction which is reflective is a critical hallmark of active learning.
\nThe continuity principle is about how the active learning experience influences future learning experiences [3]. Thus the continuity principle calls for linkages of present experiences with past to illuminate the future and subsequently evoke the motivation of continued learning. Spontaneously the principle of continuity is when the subject-content that the learner is supposed to learn about has been psychologised. The psychologising of subject-content is about relating it to the learners’ prevailing experiences which are the real life-experiences [5].
\nThe responsibility of the educator is to create educative experiences that would result in the development of the learner through active learning [5]. The educator should take into consideration the requisite educative experience principles which are continuity and interaction. Thus the educator should design education experiences for the learners that are hinged on the learners’ past experiences. In other words, the educator needs to be able to design for the learners, meaningful and interactive experiences that are connected to the learners’ environment and experiences for them to be actively involved in learning.
\nThe learners should be made to think reflectively about their experiences in order to learn from these experiences. It is the responsibility of the educator to critically interrogate his or her teaching practices in order to accommodate learners’ experiences that would make their learning more meaningful. The educator should be able to realise his or her procedural epistemic gaps that stifle reference to learners’ experiences [7]. Thus the educator should employ the dialogical techniques that call for reflection on the experiences of both the educator and the learners.
\nReflection is the requisite for experiential, active learning [5]. Dewey considers reflection as a systematic, complex, rigorous, intellectual, and emotional process that gets improved through continuous processing of experiences. In other words, reflection is a meaning-making process that deepens the understanding of one’s experience for the illumination of interpretations of the other experiences. Reflection is the nodal point between past and present experiences. Thus a realisation of the relationships and connections of experiences enhances continuity of education.
\nThe motivator of reflective thinking is the doubt that one has about experiences [5]. The experience which is perplexing needs to be analysed and interpreted by reflecting on the outcomes of employing past experience and prior knowledge. When reflection is incorporated in practice, then there is reflective practice which has the potential to dissipate mis-educative and non-educative experiences which are associated with non-active learning.
\nThus through reflective practice, educators get engaged in continuous professional learning and learners get engaged in active learning. Both the educator and learner are conscientized to look back on their practices and reflect on how best to achieve optimal learning outcomes.
\nExperience is the conscious involvement of a person in a situation or event which requires that one thinks, feels, does and concludes at the time or immediately thereafter [8]. Thus experience is given meaning and value when one does some reflections which involves recapturing experiences, thinking about them, mulling them over and evaluating them.
\nExperiential learning is akin to active learning and is reactive to traditional learning which according to Dewey was anti-democratic in terms of selection of content and learner participation in learning [9]. Traditional learning does not consider the learners’ experiences as valuable thus the learners are found to be not actively involved in their learning. Non-active learning is a mal-educative practice which can be mitigated by experiential learning which stresses on that the goals of learning are best achieved through experiences that are directly related to the learner’s life [3]. In experiential learning, learning happens through actually doing something and subsequently reflecting on the experiences. The educators are not supposed to employ the monological teaching techniques in which content is presented via lectures but through dialogical techniques which employ continuous conversations about how to meaningfully interpret the experiences in the learning situations [1]. The dialogue that occurs in the interpretation of experiences entails reflection and subsequent explanations of the relationship between experience and knowledge. Thus experiential, active learning is anchored on experience and reflection.
\nReflective, active learning is aimed at learning how to transform experience into knowledge and how to employ the knowledge for individual and societal development [1, 3]. However, active learning from experiences is not the panacea to the vices of traditional education per se. It should be borne in mind that not all experiences are essentially virtuous for learning. The virtuousness of experiences should be judged focusing on whether the learner was developed; intellectually, emotionally and socially. The development is manifested in the insatiable desire to learn which culminates in lifelong learning.
\nActive learning involves intellectual engagement in the form of reflections during the course of learning. The learner does reflection-in-action which entails active, persistent and careful interpretation of experiences for the construction of new knowledge [10]. Reflection-in-action is indispensable in action research where practice is critical. The employing of reflection-in-action in professional practice makes the practitioner realize his or her shortcomings and then think of mitigations thereof. Thus the practitioner reflects in action by evaluating the efficacy of the interactions during the teaching-learning situation [11].
\nReflection-in-action incorporates a wide range of the practitioner meta-cognition of activities during the teaching-learning situations. The practitioner reflects on reflections in the creation of new knowledge about approaches he or she employs. The learner also reflects on reflections when refining the conceptualization of phenomena. Reflection-in-action of both the practitioner and learner ignites dialogue for the construction of knowledge.
\nReflective practice entails reflection-on-action which engages the learner in a process of continuous, active learning [12]. The reflection that the learner does on own actions is interrogative of experiences in order to interpret the experiences. Reflection-on-action involves paying critical attention to experiences which are the basis for giving meaning and practical value to learning [13]. Thus learning outcomes should be examined reflectively and reflexively to give them meaning.
\nReflection-on-action is indispensable in practice-based learning that the teacher education learners are involved in especially when they are engaged in action research. The learners get involved in learning from their actions rather than from the transfer of knowledge by the ‘educator’ [14]. The learner who is involved in action research develops the disposition of reflection on actions. There is conscious scrutiny of emotions, experiences, actions, and responses to situations in order to gain insights of interpretations of knowledge being gained. The learner does not merely review the past actions and events but processes them in order to construct new knowledge [15]. Thus the learner understands phenomena within his or her own context which provides a strong anchorage to understanding phenomena at global levels [16].
\nThe practice of reflection-on-action is critical in the field of teacher education and teacher professional development since it is the basis for many programmes of initial teacher education [17]. The teacher education learner is expected to embrace the practice of reflection-on-action since it entails the process that the practitioner studies his or her own teaching methods to discover the best practice of learning facilitation [17, 18].
\nReflection-on-action can be regarded as learning from experience and is critical to the learner taking responsibility in the learning situations. The learner gets engaged in meta-cognition [19]. Without reflection-on-action, learners are not intellectually active in their learning so as to come up with concrete knowledge about phenomena.
\nReflective practice moves teachers from their knowledge base of distinct skills to a stage in their careers where they are able to modify their skills to suit specific contexts and situations, and eventually to invent new strategies [20]. Thus through reflective practice educators are able to develop themselves beyond existing theories in practice and become responsive to the dynamic environments of their day to day practices.
\nAction research embarked on by teacher education learners is hinged on praxis. The learners are supposed to be actively involved in testing the feasibility of theories in the contexts that they will be practicing. In praxis, there is also a focus on practice for theory. The engagement of the teacher-education learners in action research enables them to generate theory when they are practicing in their contexts.
\nAction research is a mode of research in quest for the requisite knowledge, skills and attitudes about how to improve on one’s practice. The educator-researcher embarks on research to improve on the self in terms of teaching skills, techniques and strategies. The value of action research is in the improvement that occurs in classroom interactions. Action research can be viewed as a tool for classroom practice reform [21].
\nAction research is defined as;
\n... a form of collective self-reflective enquiry undertaken by participants in social situations in order to improve the rationality and justice of their own social and educational practices and the situations in which these practices are carried out [22].
\nThus action research is a form of applied research which is done by practitioners to try to solve immediate problems in their working environments [23]. The teacher-education learner is encouraged to become an educator-researcher bridging the gap between practice and research. Thus the special feature that distinguishes action research from other forms of research is that research is conducted at the same time as action is being taken to improve on the practices [24]. The purpose of action research is for the practitioner to investigate and improve own practice and the process of action research is one of self-study [25].
\nThe teacher-education learner who embarks on action research implicitly engages him/herself in active life-long-learning which ultimately develops one into an effective educator. Effective educators are themselves reflective-educator-students who research on ways to enhance their existing procedural knowledge. The educator who embarks on action research never boasts of experience of having so many years as a practitioner. He or she becomes aware of the truism that experience is not about the number of years spent doing routine things but how one has geared up his mental agility to find solutions to problems. The educator thus considers himself or herself as the educator-student-researcher and the learners are considered as the research informants. The educator is encouraged to be introspective whenever there is a problem. He or she is expected to blame the self before blaming anyone else for any educational problem experienced by the learner. Thus the educator is oriented to focus on the problem in relation to personal shortcomings.
\nAction research offers an alternative to educators who have been oriented to look to others rather than to themselves and their students to find ways for improving on learning [26]. Thus action research empowers the practitioners by promoting their involvement, engagement, participation and critical consciousness in exploring strategic and effective actions to improve professional competency and the quality of learning [25].
\nThe educator who embarks on action research develops open-mindedness about the educational issues [27]. One who is open-minded is receptive to new knowledge and hence develops faster in the profession. The educator finds to it that the sources of knowledge are not the published texts only but the colleagues he or she works with and the learners whom he or she teaches.
\nAn educator who embarks on action research does not experience solitude in research. At some instances, action research requires some collaborative effort from colleagues [28]. The colleagues are there to reflect on the educator-researcher’s performance and then they advise accordingly. Thus the educator-researcher has an opportunity for professional discourses with the colleagues. The partnership that is created is conducive to sound professional development since the educator-researcher gains some insights on issues to consider when reflecting on the self [16]. Thus action research encourages the sharing of reflections and makes the educator willing to learn from their mistakes and improve on their practice for the benefit of everyone affected by it.
\nThe educator who is an action researcher has a proclivity towards initiating some changes in the ways of facilitating learning [29]. He or she is never contented with how he or she does his or her work. The educator always researches on the self in relation to educational issues so as to anchor his or her practices on functional, epistemic rationalities rather than on technical rationality.
\nAction research encourages the practitioner to get into partnerships with colleagues in studying the self in order to improve. Thus the practitioners individually and collectively try to understand how they are formed and reformed as individuals, when they work together to improve processes of teaching and learning in the classroom [30]. Action research is participatory in the sense that practitioners can only do action research “on” themselves, either individually or collectively. It is not research done on others.
\nAction research engages the practitioners in examining the social practices that link them with others in educational interaction. The practitioners explore their practices of communication and social organization and try to explore how to improve their interactions by changing the actions that they are comprised of.
\nThrough action research, practitioners explore the ways in which their practices are shaped and constrained by wider technical rationalist ideas which are socio-cultural, academic, economic and political. The teacher-education learner does not become parochial in employing the age-old theories and personal hunches.
\nAction research aims to make the practitioner investigate reality about the self in order to change it [31]. In particular, it is a deliberate process through which practitioners aim to transform their practices through a spiral of cycles of critical and self-critical action and reflection.
\nSome teacher-education learners enter higher education without the motivation of being actively involved in their learning. They do not think reflectively about their experiences [32]. One of the reasons is that some college lecturers follow a curriculum design that focuses on subject-matter content when teaching rather than on the development of reflective thinking [33]. The lecturers who simply follow guidelines in curriculum documents do not teach the teacher-education learners to be intellectually involved [32]. Such lecturers have a lecturer-centred orientation that incorporates misconceptions that lecturing is about imparting information or transmitting structured knowledge [34]. They use retrieval or recall types of questions which inhibit reflective thinking [32].
\nThe lecturer-centred teacher educator is obsessed by employing monologic techniques that are manifested among other ways in the use of the presentation and demonstration methods. The learners are supposed to absorb bodies of ‘stable, eternal knowledge’ that are transferred by the lecturer. The learners are immersed in a mass culture which is supposed to be contented with the status quo [35]. The aspects that imply active, intellectual involvement such as inquisitiveness, analyticity, reflectivity, reflexivity and truth-seeking are consciously thwarted. The learners are deprived of learning how to learn [36]. Thus the monological techniques obviate learner active involvement in their learning.
\nSome teacher education learners were interviewed about their reflections on their learning experiences when they were carrying out research projects. The interviews were premised on the phenomenological hermeneutics paradigm [37]. The purpose of the phenomenological hermeneutics paradigm is to understand the lived experiences of the informants from their own perspectives [37, 38, 39, 40]. These lived experiences were expressed in the informants’ own words to authenticate the interpretations of the researcher.
\nThe informants were selected purposively to have balances in the type of researches that they carried out and the sexes. They were considered to be information-rich on the basis that they had experiences in either traditional research or action research which they reflected upon with regards to learning efficacy. The table below shows the type of research and sex distributions of the informants.
\nInformant | \nResearch type | \nMale | \nFemale | \n
---|---|---|---|
Informant 1 | \nTraditional | \n\n | X | \n
Informant 2 | \nTraditional | \n\n | X | \n
Informant 3 | \nTraditional | \nX | \n\n |
Informant 4 | \nTraditional | \nX | \n\n |
Informant 5 | \nAction | \n\n | X | \n
Informant 6 | \nAction | \n\n | X | \n
Informant 7 | \nAction | \nX | \n\n |
Informant 8 | \nAction | \nX | \n\n |
The interviews were audio-taped in order to capture all the data that were being generated. The data were then transcribed. Analysis of the data was done by employing the thematic approach while focusing on the Johnson and Christensen method which generates themes from excerpts in the interviews transcripts [41, 42, 43]. The emic interpretations (informants’ reflections on experiences in their own words) informed the etic interpretations (the researchers’ reflections on informants’ interpretations) [23].
\nThe reflections of the teacher education learners on how they experienced learning when they carried out researches are classified according the value that they attached on their experiences during carrying out researches.
\nThere are instances in teacher education when learners are exposed to non-educative experiences which do not afford them any time for active learning when they reflect on the experiences [7]. In formant 1 postulated,
\n“I am not aware of what is going on in my research project. My supervisor tells me what to write. I am doing research just for the sake of it. I want a diploma and nothing more.”
\nThe learner is not actively involved in learning and is not motivated to do further learning. The ‘educators’ who do not engage learners in active learning, perpetuate non-educative experiences and are bearers of incontrovertible knowledge since their experiences dominate the experiences of the learners [4, 44]. Confirmatory remarks were given by informant 2 who posited;
\n“My supervisor gave me the topic to research on. What disturbed me most was that the problem I was forced to research on was not realistic since I was not experiencing it. To me it was an imaginary problem.”
\nThe situation in the non-educative experiences is that ‘educators’ do not engage learners in active participation in the teaching-learning situation and the learners are made to be aware of that their experiences are sanctioned by the ‘educator’ since all interactions are enforced by rules and regulations [41]. The ‘educator’ is the moderator of all experiences and reflections are determined by him or her. Thus the meaning of experiences is vicariously made by the ‘educator’.
\nFurthermore, non-active learning is non-educative since the learner becomes docile, receptive, and less reflective on the experiences [3]. The learners’ experiences are not considered since they have the potential to conflict with the status quo. Informant 3 made the remark;
\n“I went on teaching practice when I had gone half-way my research. I was told what to write by my supervisor. He said that the problem I would ‘experience’ was supposed to fit in what I had done at college. I had to fabricate some ‘data’ in order not to get at loggerheads with the supervisor. I needed the blessings of the supervisor.”
\nThe traditional ‘educators’ who expose the learners to the non-active learning experiences are the disseminators of incontrovertible, static knowledge [3]. They have the conviction that learning is about absorbing vast bodies of processed knowledge. Thus according to these education traditionalists, it is not necessary to have the learners reflect on ‘purified’ knowledge that was generated by renowned academics.
\nTraditional education is considered to be non-educative on the grounds that it is detached from the experiences of the learner. Thus the methods of learning are foreign to the existing experiences and capacities of the learners [3, 45]. Informant 4 explained;
\n“I do not know anything about research methodology. The supervisor just talks about things that I do not understand. I am confused by everything.”
\nThe quotation above implies that the learner just passes through the rhythms of the narrations by the ‘educator’ without any enthusiasm and not making any sense of the content [3]. Thus the non-active learning experience is considered to be undemocratic since it does not consider the interests of the learner and it separates the learner’s experiences from learning.
\nTraditional education has been distinguished largely by its negative influences on future experiences [3]. The learners who experience traditional education are tied to subject-content without consideration of its relevance to real life [46]. Informant 2 postulated;
\n“I was given the research topic by the supervisor. The topic that I wanted to research on was brushed aside. The supervisor said that she had no time to grapple with a topic she was not interested in. I had to follow the interests of the supervisor for me to pass. My interests would not make me survive in this academic jungle. I was not motivated to do my research study.”
\nThe learners who are exposed to the situation that is described by informant 2 lose “the impetus to learn” [3]. The experiences which the learner undergoes stifle the principle of continuity and are referred to by Dewey as mis-educative. A mis-educative experience obstructs growth for future experiences and also arrests or distorts growth [47]. After having gone through a mis-educative experience, the learner would not be motivated to be engaged in similar experiences due to the unpleasantness and/or meaninglessness of the experience. A mis-educative experience can be disjointed with the previous experiences and this makes the learners unable to make sense of future experiences [48].
\nA mis-educative experience can also be one that engages the learner into routine action which does not give room for new experiences [11]. The learner’s environment becomes confined to the same things thus narrowing new and further experience. Routine action is repeated action which does not promote active learning for the broadening of the meaning-making horizon [10]. Confirmatory remarks were given by informant 4;
\n“The supervisor gave me a finished research project to copy from. He said that I would get a distinction if I would copy the project that he once awarded a distinctive mark. My conscience told me that I was cheating on myself.”
\nSimilar remarks were given by informant 1 who postulated;
\n“It is some sort of a tradition that a research project is hard to complete without copying. I was told by my sister who is a teacher. My supervisor is not explicit about it but is implicit. She encourages me to get what I want from a finished research project.”
\nThe supervisor who is a pseudo-educator gets the learner involved in vicarious experiences which are characterised by routine actions. The learner is alienated from his or her experiences to the extent of not being aware of the meanings that could be created from interactions with one’s environment. Routine action makes learners unaware pawns in the midst of their own experiences [3]. The learners become enslaved in routine that any deviations render them the negative labels such as being dull or disobedient [11]. In order to avoid the negative labels, the learners become alienated from themselves and thus become prone to self-estrangement.
\nThe principle of continuity also known as the experiential continuum embraces active learning and is one of the principal criteria for judging whether an experience is an educative one or not [3]. The principle is involved in attempting to assess the educational worthiness of experiences [3]. The criterion is manifested by the learner when he or she develops intrinsic motivation to continuous learning. Informant 5 expressed the principal of continuity by postulating;
\n“The problem that I am researching on is a result of my own experiences. The tuition that I am getting from the supervisor is meaningful since it is about a realistic problem. After my course, I will be able to carry out researches on my own to improve on my practice.”
\nIn corroboration, informant 6 remarked;
\n“The relationship that I have with my supervisor is dialogical. The supervisor listens to my challenges and then suggests how I could surmount the challenges. I have been enlightened on how researches are carried out. I can do my own researches for professional development.”
\nActive learning is an educative experience which wards off complacency in the learner and instils an attitude of further exploration of the meaning of the present experience in connection with the past experience. The learner processes the data generated in the current experiences by using the meanings given by the previous experiences. Informant 7 explained;
\n“The experiences I got when I was doing action research have provided me with valuable knowledge, skills and attitudes to be continuously engaged in research in order to improve on my practice. I can make reference to my research findings when trying to solve similar problems.”
\nAn educative experience is realised when there is reflection on the experiences and meaning is made. It is the meaning that the learner attaches to an experience which gives the experience some value. Informant 8 remarked;
\n“I experienced the problem that I am attempting to find a solution to. I am also experiencing the shortcomings of my practices in trying to solve the problem. I have since realized that I can improve on my teaching practices when I am introspective.”
\nActive learning in the teacher education curriculum is requisite in the construction of meaning from experiences. The learners are supposed to be engaged in reflective practice. The explicit realisation of the reflective practice in teacher education is in carrying out action research which entails reflection-in-action and reflection-on-action. Reflection is indispensable in active learning situations since it is the nodal point between past and present experiences. Any situation that stifles reflection on experiences begets non-educative and mis-educative experiences. According to the teacher education learners, the teacher educators who are traditionally oriented are pseudo-educators since they are responsible for the sustenance of traditional education which maintains the status quo. On the other hand, the learners who are exposed to action research are actively involved in professional development. The learners develop a disposition for open-mindedness and knowledge insatiability in their profession which culminates into life-long learning.
\nThe Edited Volume, also known as the IntechOpen Book, is an IntechOpen pioneered publishing product. Edited Volumes make up the core of our business - and as pioneers and developers of this Open Access book publishing format, we have helped change the way scholars and scientists publish their scientific papers - as scientific chapters.
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\\n\\nOut of all of the publishing options available to researchers, why choose to contribute your research to an IntechOpen Edited Volume? The reasons are simple. IntechOpen has worked exceptionally hard over the past years to fine tune the Open Access book publishing process and we continue to work hard to deliver the best for all of our contributors. The quality of published content is of utmost importance to us, followed closely by speed, and of course, availability and accessibility. To view current Open Access book projects that are Open for Submissions visit us here.
\\n\\nQUALITY CONTENT
\\n\\nOver the years we have learned what is important. What makes a difference to the researchers that work with us, what they value. Something that is very high not only on their lists, but our own, is the quality of the published content.
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\\n\\nWith regular submission for coverage in the single most important database, the Book Citation Index in the Web of Science™ Core Collection (BKCI), and no rejected submissions to date, over 43% of all Open Access books indexed in the BKCI are IntechOpen published books.
\\n\\nIn addition to BKCI, IntechOpen covers a number of important discipline specific databases as well, such as Thomson Reuters’ BIOSIS Previews.
\\n\\nACCESS
\\n\\nThe need for up to date information available at the click of a mouse is one thing that sets IntechOpen apart. By developing our own technologies in order to streamline the publishing process, we are able to minimize the amount of time from initial submission of a manuscript to its final publication date, without compromising the rigor of the editorial and peer review process. This means that the research published stays relevant, and in this fast paced world, this is very important.
\\n\\nYOUR WORK, YOUR COPYRIGHT
\\n\\nThe utilization of CC licenses allow researchers to retain copyright to their work. Researchers are free to use, adapt and share all content they publish with us. You will never have to pay permission fees to reuse a part of an experiment that you worked so hard to complete and are free to build upon your own research and the research of others. The Edited Volume helps bring together research from all over the world and compiles that research into one book - accessible for all. The research presented in chapter one can inspire the author of chapter three to take his or her research to the next level. It is about sharing ideas, insights and knowledge.
\\n\\nCan collaboration be inspired by a publishing format? At IntechOpen, the answer is yes. The way the research is published, the way it is accessed, it’s all part of our mission to help academics make a greater impact by giving readers free access to all published work.
\\n\\nOur Open Access book collection includes:
\\n\\n3,332 OPEN ACCESS BOOKS
\\n\\n107,564 INTERNATIONAL AUTHORS AND ACADEMIC EDITORS
\\n\\n113+ MILLION DOWNLOADS
\\n\\nPUBLISHING PROCESS STEPS
\\n\\nSee a complete overview of all publishing process steps and descriptions here.
\\n\\nCURRENT PROJECTS
\\n\\nTo view current Open Access book projects that are Open for Submissions visit us here.
\\n\\nNot sure if this is the right publishing option for you? Feel free to contact us at book.department@intechopen.com.
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\n\nOut of all of the publishing options available to researchers, why choose to contribute your research to an IntechOpen Edited Volume? The reasons are simple. IntechOpen has worked exceptionally hard over the past years to fine tune the Open Access book publishing process and we continue to work hard to deliver the best for all of our contributors. The quality of published content is of utmost importance to us, followed closely by speed, and of course, availability and accessibility. To view current Open Access book projects that are Open for Submissions visit us here.
\n\nQUALITY CONTENT
\n\nOver the years we have learned what is important. What makes a difference to the researchers that work with us, what they value. Something that is very high not only on their lists, but our own, is the quality of the published content.
\n\nOur books contain scientific content written by two Nobel Prize winners, two Breakthrough Prize winners and 73 authors who are in the top 1% Most Cited.
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\n\nIn addition to BKCI, IntechOpen covers a number of important discipline specific databases as well, such as Thomson Reuters’ BIOSIS Previews.
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\n\nThe utilization of CC licenses allow researchers to retain copyright to their work. Researchers are free to use, adapt and share all content they publish with us. You will never have to pay permission fees to reuse a part of an experiment that you worked so hard to complete and are free to build upon your own research and the research of others. The Edited Volume helps bring together research from all over the world and compiles that research into one book - accessible for all. The research presented in chapter one can inspire the author of chapter three to take his or her research to the next level. It is about sharing ideas, insights and knowledge.
\n\nCan collaboration be inspired by a publishing format? At IntechOpen, the answer is yes. The way the research is published, the way it is accessed, it’s all part of our mission to help academics make a greater impact by giving readers free access to all published work.
\n\nOur Open Access book collection includes:
\n\n3,332 OPEN ACCESS BOOKS
\n\n107,564 INTERNATIONAL AUTHORS AND ACADEMIC EDITORS
\n\n113+ MILLION DOWNLOADS
\n\nPUBLISHING PROCESS STEPS
\n\nSee a complete overview of all publishing process steps and descriptions here.
\n\nCURRENT PROJECTS
\n\nTo view current Open Access book projects that are Open for Submissions visit us here.
\n\nNot sure if this is the right publishing option for you? Feel free to contact us at book.department@intechopen.com.
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