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51.
Ahmet Saban 《Teaching Education》2013,24(4):299-315
This article reviews the pertinent research literature on metaphors in teaching and teacher education. The main purpose is to explore these metaphors as evidences of prospective and practicing teachers' reasoning about teaching, learning, and schooling. The current review is organized around the major functions of metaphor in education. In this way, it is intended to contribute to the existing scholarly research in the field of teaching and teacher education stemming largely from metaphor analysis. The present essay discusses 10 distinct functions of metaphor in education and provides illustrative studies for each function. It strongly argues for the inclusion of various educational metaphors in teacher education programs because of their functional benefits. 相似文献
52.
Exploring Students’ Ideas About Risks and Benefits of Nuclear Power Using Risk Perception Theories 总被引：1，自引：0，他引：1
Ahmet Kılınç Edward Boyes Martin Stanisstreet 《Journal of Science Education and Technology》2013,22(3):252-266
Due to increased energy demand, Turkey is continuing to explore the possibilities of introducing nuclear power. Gaining acceptance from local populations, however, may be problematic because nuclear power has a negative image and risk perceptions are complicated by a range of psychological and cultural factors. In this study, we explore the views about nuclear power of school students from three locations in Turkey, two of which have been proposed as sites suitable for nuclear power plants. About half of the student cohort believed that nuclear power can supply continuous and sufficient electricity, but approximately three quarters thought that nuclear power stations could harm organisms, including humans, living nearby. Rather few students realized that adoption of nuclear power would help to reduce global warming and thereby limit climate change; indeed, three quarters thought that nuclear power would make global warming worse. There was a tendency for more students from the location most likely to have a nuclear power plant to believe negative characteristics of nuclear power, and for fewer students to believe positive characteristics. Exploration of the possible nuclear power programmes by Turkey offers an educational opportunity to understand the risk perceptions of students that affect their decision-making processes. 相似文献
53.
Betul Apaydin Yildirim Saban Kordali Kubra Asena Terim Kapakin Fatih Yildirim Esra Aktas Senocak Serdar Altun 《Journal of Zhejiang University. Science. B》2017,18(6):501-511
The aim of this study was to evaluate the possible therapeutic or protective effects of Helichrysum plicatum DC. subsp. plicatum ethanol extract (HPE) against gentamicin-induced nephrotoxicity. Thirty-six Sprague Dawley male rats weighing between 200 and 250 g were used as live material. They were formed into six groups containing 6 rats each and were allowed to adapt to laboratory conditions for 7 d. Group I: control, 5% DMSO intraperitoneal (i.p.); Group II: HPE 100 mg/(kg·d) i.p.; Group III: HPE 200 mg/(kg·d) i.p.; Group IV: gentamicin as 80 mg/(kg·d) i.p.; Group V: gentamicin as 80 mg/(kg·d) i.p.+HPE 100 mg/(kg·d) i.p.; and Group VI: gentamicin as 80 mg/(kg·d) i.p.+HPE 200 mg/(kg·d) i.p. for 8 d. Following treatment, serum, liver, and kidney tissues were used to assess blood urea nitrogen (BUN), creatinine, enzymatic and non-enzymatic antioxidants, and lipid peroxidation. Gentamicin significantly increased serum BUN, creatinin, and liver and kidney levels of malondialdehyde (MDA). It also decreased the activity of catalase (CAT), glutathione peroxidase (GPx), and superoxide dismutase (SOD). Treatment with the HPE 100 mg/kg reversed gentamicin-induced alterations as evidenced by decreased serum BUN and creatinin, liver and kidney oxidant marker, and tubular necrosis as well as by an increase in antioxidant enzymes. It was found that HPE 200 mg/kg significantly increased liver and kidney tissue MDA levels in nephrotoxicity in rats. As a result, these findings support the proposition that HPE in 100 mg/kg dose demonstrates in the kidney and liver as free radicals and scavenger to prevent the toxic effects of gentamicin in both the biochemical and histopathology parameters. 相似文献
54.
Ahmet Kilinc Thomas Kelly Baris Eroglu Umit Demiral Tezcan Kartal Arzu Sonmez Mehmet Demirbag 《International Journal of Science and Mathematics Education》2017,15(2):195-213
For science teachers using the discourse of socioscientific issues (SSI), it is important to make a decision as to whether when and how to disclose their own positions. The existing limited literature shows that science teachers prefer one of four roles during SSI discourse: sticker to facts, imposer, democracy advocator, and committed impartialist. The purpose of the present research is to understand the nature of preservice science teachers’ (PST) beliefs underlying such selection. Based on existing literature, we developed a teacher’s belief questionnaire including vignettes representing four teacher’s roles in discussion of genetically modified (GM) foods. Three hundred twenty-four (324) PSTs from a Turkish context experiencing SSI-based reforms completed these questionnaires, selected one of the teacher’s roles, and justified their selection by writing reasons. Content analysis procedures were used in data analysis of this qualitative study. The results show that most PSTs selected dialogical roles (democracy advocators and committed impartialists). Looking at their beliefs, epistemologies and teaching goals work together in PSTs’ selection of their preferred role. In addition, we argue that there is no desired alignment between teachers’ existing beliefs and expectations of SSI reforms. We conclude by indicating certain implications that may enhance such alignment. 相似文献
55.
Currently, it is strongly suggested that our thought processes are largely metaphorical in nature. Indeed, the metaphors we use not only represent the way we perceive the world and reality but also shape our professional ideas, attitudes, and practices. This study employs metaphor as a means of research to provide insights into the images prospective classroom teachers have of themselves as future teachers (i.e., professional self-images), their elementary teachers (i.e., former classroom teachers), and their cooperating teachers (i.e., supervisors of student teaching practices). Data for this study were gathered through the administration of a Likert-style questionnaire consisting of 20 metaphorical images of “classroom teacher” to 363 exit level elementary teacher education students enrolled in the Faculty of Education of Selcuk University in Turkey during the 2002–2003 academic year. Results indicate that the teacher candidates in this study appear to be less teacher-centered and more student-centered than their both elementary and cooperating teachers. Also, female teacher candidates appear to be less teacher-centered and more student-centered than their male peers. Implications for preservice teacher education and further research are discussed. 相似文献
56.
This paper discusses the organization of adult education in Turkey. From a historical perspective, it examines the development, organization and problems of post‐school adult education. It shows these to be related to the politics and position of Turkish society in the Middle East and to the high degree of centralization of educational decision making in Turkey. The paper argues a case for the decentralization of adult education services for better training of adult educators and better delivery of adult educational provisions. 相似文献
57.
Science & Education - The purpose of the present study was to understand the nature of the link between science teachers’ epistemologies and their socioscientific issue (SSI) teaching... 相似文献
58.
Serap Cuhadar Mehmet Koseoglu Aysenur Atay Ahmet Dirican 《Biochemia medica : ?asopis Hrvatskoga dru?tva medicinskih biokemi?ara / HDMB》2013,23(1):70-77
Introduction:
Optimal storage of serum specimens in central laboratories for a long period for multicenter reference interval studies, or epidemiologic studies remains to be determined. We aimed to examine the analytical stability of chemistry analytes following numerous freeze-thaw and long term storage.Materials and methods:
Serum samples were obtained from 15 patients. Following baseline measurement, sera of each subject were aliquoted and stored at −20 °C for two experiments. A group of sera were kept frozen for up to 1, 2 and 3 months and then analyzed for stability. The other experiment consisted of one to ten times of freeze and thaw cycles. Total of 17 chemistry analytes were assayed at each time point. The results were compared with those obtained from the initial analysis of fresh samples. Median or mean changes from baseline (T0) concentrations were evaluated both statistically and clinically according to the desirable bias.Results:
Of the analytes studied, aspartate aminotransferase (AST), alanine aminotransferase (ALT), creatine kinase (CK), gamma-glutamyl transferase (GGT), direct bilirubin, glucose, creatinine, cholesterol, triglycerides, high density lipoprotein (HDL) were stable in all conditions. Blood urea nitrogen (BUN), uric acid, total protein, albumin, total bilirubin, calcium, lactate dehydrogenase (LD) were changed significantly (P < 0.005).Conclusions:
As a result, common clinical chemistry analytes, with considering the variability of unstable analytes, showed adequote stability after 3 months of storage in sera at −20 °C, or up to ten times of freeze-thaw cycle. All the same, such analysis can only be performed for exceptional cases, and this should be taken into account while planning studies. 相似文献59.
Esra Eret-Orhan Ahmet Ok Yesim Capa-Aydin 《Asia-Pacific Journal of Teacher Education》2018,46(2):183-198
The study aimed to assess the adequacy of pre-service teacher education in Turkey as perceived by preservice teachers. Specifically, the researchers investigated preservice teachers’ perceptions of the adequateness of their education in terms of developing teaching skills and the major components of teacher education. The factors affecting their perceptions were also examined. In total, 1856 preservice teachers participated in the study. A questionnaire was prepared to collect data from the participants. According to the findings, teacher education should be enhanced in terms of preparing candidates for skills such as teaching in different contexts and cooperating with parents; and practicum hours needed to be improved for more effective preparation of preservice teachers. Moreover, it was also found that the preservice teachers’ subject, college, orientation towards teaching and the perceived adequacy of program components played significant roles in affecting their perceptions of teacher education. 相似文献
60.
Dielectrophoresis (DEP) is employed to differentiate clones of mouse melanoma B16F10 cells. Five clones were tested on microelectrodes. At a specific excitation frequency, clone 1 showed a different DEP response than the other four. Growth rate, melanin content, recovery from cryopreservation, and in vitro invasive studies were performed. Clone 1 is shown to have significantly different melanin content and recovery rate from cryopreservation. This paper reports the ability of DEP to differentiate between two malignant cells of the same origin. Different DEP responses of the two clones could be linked to their melanin content. 相似文献