排序方式： 共有137条查询结果，搜索用时 406 毫秒
71.
This article introduces an exercise that simulates the negotiation process in a dynamic supply chain. The retailer and wholesaler roles are assigned to student groups who negotiate supply contracts in a number of rounds during a class period. Each group makes pricing, inventory, and ordering decision concurrently, and competes with others to achieve the highest profit. The exercise is easy to implement using pen and paper, and lends itself to a wide variety of negotiation environments. 相似文献
72.
Mehmet Sahin 《Journal of Science Education and Technology》2010,19(3):266-275
This study investigated the effects of problem-based learning on students’ beliefs about physics and physics learning and
conceptual understanding of Newtonian mechanics. The study further examines the relationship between students’ beliefs about
physics and their conceptual understanding of mechanics concepts. Participants were 124 Turkish university students (PBL = 55,
traditional = 69) enrolled in a calculus-based introductory physics class. Students’ beliefs about physics and physics learning
and their physics conceptual understanding were measured with the Colorado Learning Attitudes about Science Survey (CLASS)
and the Force Concept Inventory (FCI), respectively. Repeated measures analysis of variance of how PBL influence beliefs and
conceptual understanding were performed. The PBL group showed significantly higher conceptual learning gains in FCI than the
traditional group. PBL approach showed no influence on students’ beliefs about physics; both groups displayed similar beliefs.
A significant positive correlation was found between beliefs and conceptual understanding. Students with more expert-like
beliefs at the beginning of the semester were more likely to obtain higher conceptual understanding scores at the end of the
semester. Suggestions are presented regarding the implementation of the PBL approach. 相似文献
73.
This qualitative–case study examined how portfolio and portfolio assessment were perceived by prospective teachers. The participants
were 23 prospective teachers from seven different teaching areas from a Turkish university. A semi-structured individual interview
was conducted. The interview schedule included 15 open-ended questions. The main results emerged from content analysis were
that prospective teachers perceived portfolio as a learning and an assessment tool. Further, they believed that portfolio
was complementary rather than an alternative assessment method to traditional assessment procedures. 相似文献
74.
Siham Al-Amoush Silvija Markic Muhammet Usak Mehmet Erdogan Ingo Eilks 《International Journal of Science and Mathematics Education》2014,12(4):767-792
This paper discusses beliefs about teaching and learning chemistry. The sample includes chemistry student teachers and in-service teachers from Jordan, Turkey, and Germany. Two test instruments were used to investigate (student) teachers’ beliefs. A qualitative instrument was used to explore Beliefs about Classroom Organization, Beliefs about Teaching Objectives, and Epistemological Beliefs. A quantitative instrument was added to evaluate participants’ beliefs concerning the Nature of Good Education. The results show that Jordanian chemistry teachers and teacher trainees held the most traditional, teacher-centered, and transmission-oriented beliefs, while the German sample showed the most modern beliefs toward teaching and learning. Turkish (student) teachers evidenced more moderate beliefs, which tended to be between the two extremes, but that could still be positioned more closely to the traditional way of thinking. The results are discussed in the context of chemistry teacher education in the three respective countries. 相似文献
75.
76.
At&#;c&#; U&#;ur Adem Aylin &#;enol Mehmet Burak Da&#;deviren Metin 《Education and Information Technologies》2022,27(5):5989-6014
Education and Information Technologies - The COVID 19 pandemic not only affected our health and social life in many aspects, but it also changed the classical way of training in classrooms and... 相似文献
77.
Mehmet Sahin Nurettin Yorek 《美中教育评论》2009,6(4):19-26
Students have long regarded science as a difficult subject because of hard and abstract concepts. Traditional science teaching has been depended mostly on visual instruction. This makes it difficult for visually impaired （VI） or partially sighted students included in regular classrooms to learn the concepts. Blind students on the other hand, have no visual input at all. They need to learn using other senses such as touching and hearing. Classrooms should be adapted and instruction should be adjusted for better science teaching to VI students. The purpose of this study was to investigate how VI students learn science. The results of the data obtained via interviews and observations revealed that VI students need instructional and environmental accommodations to learn science. They need more tactual and audio experiences than visual instruction. Suggestions and implications about teaching science to students with visual impairments are discussed. 相似文献
78.
The present study aims to identify first year Turkish Science undergraduates’ understandings and misconceptions of the concept
of light and its propagation. For this purpose, an instrument composed of four open-ended questions was developed by the researchers.
The diagnostic test was piloted with twenty students and modifications were made prior to the final administration of the
test. The content validity of the test questions was assessed by two physics researchers and one lecturer. These questions
were administered to a hundred first year undergraduates (aged 16–18) enrolled in the Science Teacher Training Department
in Ataturk University in Turkey. In addition, the semi-structured interviews of 30–40 min were conducted with the four students
whose responses involved common misunderstanding. All interview records were transcribed and analysed. The findings showed
that undergraduates’ understanding of light is poor and also they have important and prevalent misconceptions. Identified
misconceptions, some of which have been reported in the literature, are discussed qualitatively. The misunderstandings identified
were compared with those in the literature. The results have some implications for teaching light, suggesting that a substantial
revision of teaching strategies is needed.
相似文献
| Mehmet YalcinEmail: |
79.
Adjuvant effects of saponins on animal immune responses 总被引：2，自引：0，他引：2
Vaccines require optimal adjuvants including immunopotentiator and delivery systems to offer long term protection from infectious diseases in animals and man. Initially it was believed that adjuvants are responsible for promoting strong and sustainable antibody responses. Now it has been shown that adjuvants influence the isotype and avidity of antibody and also affect the properties of cell-mediated immunity. Mostly oil emulsions, lipopolysaccharides, polymers, saponins, liposomes, cytokines, ISCOMs (immunostimulating complexes), Freund’s complete adjuvant, Freund’s incomplete adjuvant, alums, bacterial toxins etc., are common adjuvants under investigation. Saponin based adjuvants have the ability to stimulate the cell mediated immune system as well as to enhance antibody production and have the advantage that only a low dose is needed for adjuvant activity. In the present study the importance of adjuvants, their role and the effect of saponin in immune system is reviewed. 相似文献
80.
Improvement of the efficacy of influenza vaccination （H5N1） in chicken by using extract of Cochinchina momordica seed （ECMS） 总被引：1，自引：0，他引：1
Rajput ZI Xiao CW Hu SH Arijo AG Soomro NM 《Journal of Zhejiang University. Science. B》2007,8(5):331-337
Seeds of a Chinese traditional medicine plant, Cochinchina momordica were used in the present study for the improvement of influenza vaccine （HSN 1） in chicken. Crude extraction from Cochinchina momordica seed （ECMS） was obtained by ethanol extraction method. In experiment No. 1, two weeks old chickens were immunized with influenza vaccine （HSN1） alone or combined with ECMS （5, 10, 20, 40 and 80 μg/dose）. Serum IgG antibody levels （by ELISA） as well as effects on dally weight gain were measured on 0, 7, 14 and 28th day after immunization. Results revealed that all ECMS groups numerically increased the antibody levels while 10 and 20 μg/dose groups significantly （P〈0.05） enhanced total IgG antibody on day 28, when compared with control. Average daily weight gain was also significantly higher in 20 μg/dose ECMS group. Adjuvant effect was also confirmed in experiment No. 2 when chickens were immunized with 20 μg/dose ECMS and antibody titer was measured through hemagglutination inhibition （HI）. It is concluded that ECMS has potential to improve the immune responses and deserve further study as an adjuvant. 相似文献