Plasma ß‐endorphin immunoreactivity: Response to resistance exercise     

Edgar F. Pierce  Norris W. Eastman  Hem T. Tripathi  Kirsten G. Olson  William L. Dewey 《Journal of sports sciences》2013,31(6):499-502

Previous research investigating the response of plasma ß‐endorphins (ß‐EP) to resistance exercise has resulted in equivocal findings. To further examine the effects of resistance exercise on ß‐endorphin immunoreactivity, six resistance‐trained athletes participated in a three‐set series of eight repetitions of isotonic exercise. All exercises were performed at 80% maximal effort. Blood was sampled from the group by venepuncture, both prior to and following the exercise bout, and ß‐endorphin concentration was determined by radioimmunoassay. The results indicated that mean ( ± S.E.) plasma levels of ß‐endorphins following exercise (18.04 ± 3.4 pg ß‐EP ml^‐1) were not significantly changed from pre‐exercise (control) levels (19.59 ± 2.4 pg ß‐EP ml^‐1), although there was considerable inter‐individual variability. Our results support previous research which has reported no significant changes in ß‐endorphin immunoreactivity following resistance exercise, as well as reported findings of considerable variability in the ß‐endorphin response to exercise.  相似文献   

Is the Study Process Questionnaire (SPQ) a good predictor of academic achievement? Examining the mediating role of achievement-related classroom behaviours     

Jeanette Lyn Fung Choy  Glen O’Grady  Jerome I. Rotgans 《Instructional Science》2012,40(1):159-172

Studies have shown that the Study Process Questionnaire (SPQ)—which provides a measure of student approaches to learning—is a relatively weak predictor of academic achievement. The present study sought to explore whether students’ achievement-related classroom behaviours, as observed by teachers, can be used as a mediator between student approaches to learning and academic achievement. The SPQ was administered to 1,608 students enrolled in six different diploma programmes offered by a polytechnic in Singapore. Data were analysed by means of correlation and path analysis. In line with existing studies, the results revealed that student approaches to learning was a weak predictor of academic achievement. However, achievement-related classroom behaviours turned out to be a significant mediator between student approaches to learning and academic achievement, effectively doubling the explained variance in academic achievement. Implications of these findings for using the SPQ are discussed.  相似文献   

Waste in Education     

Edgar Dale 《The Teacher Educator》2013,48(2):18-22

Most students learn less and forget more than they should, an unnecessary waste of time and money. Dr. Dale accurately identifies some typical instructional weaknesses and clearly suggests remedies.  相似文献   

Identifying Science Understanding for Functional Scientific Literacy     

Edgar W. Jenkins 《Studies in Science Education》2013,49(1):1-25

Students' questions play an important role in meaningful learning and scientific inquiry. They are a potential resource for both teaching and learning science. Despite the capacity of students' questions for enhancing learning, much of this potential still remains untapped. The purpose of this paper, therefore, is to examine and review the existing research on students' questions and to explore ways of advancing future work into this area. The paper begins by highlighting the importance and role of students' questions from the perspectives of both the learner and the teacher. It then reviews the empirical research on students' questions, with a focus on four areas: (1) the nature and types of these questions; (2) the effects of teaching students questioning skills; (3) the relationship between students' questions and selected variables; and (4) teachers' responses to, and students' perceptions of, students' questions. Following this, some issues and implications of students' questions for classroom instruction are discussed. The paper concludes by suggesting several areas for future research that have significant value for student learning.  相似文献   

Is a European vision for science education research a chimera?     

Edgar Jenkins 《Studies in Science Education》2013,49(2):265-272

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Reforming school science education: a commentary on selected reports and policy documents     

Edgar W. Jenkins 《Studies in Science Education》2013,49(1):65-92

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French Connections     

Edgar Jenkins 《Studies in Science Education》2013,49(1):130-134

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Creating a ‘third space’ in the context of a university–school partnership: supporting teacher action research and the research preparation of doctoral students     

Joanne Arhar  Tricia Niesz  Jeanette Brossmann  Sarah Koebley  Katherine O’Brien  David Loe 《Educational Action Research》2013,21(2):218-236

The focus of the Education Works Personalization Project was to facilitate teams of teacher action researchers whose goal was to personalize their teaching with the support of university partners including doctoral students in education. The subsequent apprentice-like research experience within this university–school partnership provided an opportunity to study the ways in which teacher action research could serve as a vehicle for bridging the culture gap between schools and universities. Both the research team experience and the development of the school–university inquiry/knowledge network were initially characterized by undefined roles accompanied by ambiguous expectations. Although the ambiguity proved difficult initially, those who persisted and engaged in new roles ultimately found these emerging inquiry communities generative and valuable. We have come to conceptualize these generative inquiry communities as third spaces and we describe how oppositional categories framed by the cultural differences between schools and universities can work together to generate new knowledge.  相似文献   

硕果和玫瑰     

埃德加·阿尔贝特·格斯特  高素菊 《海外英语》2009,(9):49-49

要想有个美丽花园, 面积大小姑且不管, 若要园中长满鲜花, 务必要把汗水挥洒。  相似文献   

Application of automated image analysis to the identification and extraction of recyclable plastic bottles     

Edgar Scavino  Dzuraidah Abdul Wahab  Aini Hussain  Hassan Basri  Mohd Marzuki Mustafa 《浙江大学学报(A卷英文版)》2009,10(6):794-799

An experimental machine vision apparatus was used to identify and extract recyclable plastic bottles out of a conveyor belt. Color images were taken with a commercially available Webcam, and the recognition was performed by our homemade software, based on the shape and dimensions of object images. The software was able to manage multiple bottles in a single image and was additionally extended to cases involving touching bottles. The identification was fulfilled by comparing the set of measured features with an existing database and meanwhile integrating various recognition techniques such as minimum distance in the feature space, self-organized maps, and neural networks. The recognition system was tested on a set of 50 different bottles and provided so far an accuracy of about 97% on bottle identification. The extraction of the bottles was performed by means of a pneumatic arm, which was activated according to the plastic type; polyethylene-terephthalate （PET） bottles were left on the conveyor belt, while non-PET bottles were extracted. The software was designed to provide the best compromise between reliability and speed for real-time applications in view of the commercialization of the system at existing recycling plants.  相似文献