提高西藏黄奶牛生产性能研究     

尼玛扎西  色珠  参木友  奥斯曼  洛桑强白  平措占堆  巴桑珠扎  次仁罗布  韩建成  王莉  顿珠紧参  姬秋梅  曲广鹏  向巴卓玛  鲍宇  红秀花  张强  John Wilkins  Colin Griffiths  John Pitz  Amanda 《西藏科技》2008,(6)

该项目是中澳国际联合的其中一个,根据发展奶业,促进农区畜牧业发展,提高农村生活水平的需要在西藏河谷流域农牧交错带开展调研.三年来在四个不同的区域进行随机抽样设点,了解项目区奶牛发展现状,系统收集分析当前农户饲养奶牛的饲料结构,营养水平、繁殖成活能力以及管理模式.同时引进澳方饲养奶牛的先进技术、管理措施和发展理念,有效利用西藏现有的作物秸秆,研发优良饲草、饲喂技术,进一步研究牛在一个生长周期中的饲料平衡、生长模式及量化营养等生产性能的对应关系,加大引创结合、重点突破,提高项目区奶牛生产性能,增加农户现金收入.  相似文献   

Mental Rotation of Tactical Instruction Displays Affects Information Processing Demand and Execution Accuracy in Basketball     

Till Koopmann  Yvonne Steggemann-Weinrich  Jochen Baumeister 《Research quarterly for exercise and sport》2017,88(3):365-370

Purpose: In sports games, coaches often use tactic boards to present tactical instructions during time-outs (e.g., 20 s to 60 s in basketball). Instructions should be presented in a way that enables fast and errorless information processing for the players. The aim of this study was to test the effect of different orientations of visual tactical displays on observation time and execution performance. High affordances in visual-spatial transformation (e.g., mental rotation processes) might impede information processing and might decrease execution performance with regard to the instructed playing patterns. Method: In a within-subjects design with 1 factor, 10 novice students were instructed with visual tactical instructions of basketball playing patterns with different orientations either showing the playing pattern with low spatial disparity to the players’ on-court perspective (basket on top) or upside down (basket on bottom). Results: The self-chosen time for watching the pattern before execution was significantly shorter and spatial accuracy in pattern execution was significantly higher when the instructional perspective and the real perspective on the basketball court had a congruent orientation. Conclusion: The effects might be explained by interfering mental rotation processes that are necessary to transform the instructional perspective into the players’ actual perspective while standing on the court or imagining themselves standing on the court. According to these results, coaches should align their tactic boards to their players’ on-court viewing perspective.  相似文献   

Some effects of variable excitation on synchronous motor oscillation     

John Griffiths Barry 《Journal of The Franklin Institute》1940,229(4):491-512

In this paper are presented the results of a study of synchronous motor oscillations resulting from sudden application of mechanical load. By means of the Differential Analyzer at the Moore School of Electrical Engineering of the University of Pennsylvania, theoretical synchronous machine equations were solved for conditions of suddenly applied load, and the effect on the resulting oscillations of variations in field excitation was determined for the most practical cases. The analyzer results were checked by a number of experimental observations, and it was found that the magnitude and duration of the oscillations could be greatly decreased by using the proper type of excitation variation.  相似文献   

Dropped in Without a Parachute: Library Managers' Supervision Experiences     

Simon P. Funge  Laura DeLancey  Austin Griffiths 《图书馆管理杂志》2017,57(7):723-741

A survey of U.S. library managers explored the relationship between their social identities, experiences supervising others, support from others, and their overall satisfaction in their professional role. The literature provides evidence that demographic differences give rise to challenges in the workplace. Though no statistically significant differences were found between minority and nonminority managers related to supervisees' microaggressive behaviors, written commentary provided evidence of these and other supervision challenges. A regression analysis found that supervisees' behaviors, along with a manager's age, were significant predictors of their satisfaction as a supervisor. Recommendations for further research and implications for libraries emerge from these findings.  相似文献   

It Takes an Academic Village: The Library’s Role in Supporting Interprofessional Communication through a Book Club     

Jessica P. Kilham  Susan P. Griffiths 《Medical reference services quarterly》2017,36(1):42-48

Book clubs offer a unique opportunity to support interprofessional learning on academic campuses. The purpose of this article is to discuss how a health sciences library partnered with the Center for Interprofessional Healthcare Education to develop a book club that fosters interprofessional communication. The article includes a discussion of the opportunities, approach, results, and challenges.  相似文献   

Teachers’ centres in the republic of Ireland: Their current position’ in in‐service education     

Yvonne O'Reilly 《Irish Educational Studies》2013,32(1):137-154

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Methodological and Ethical Dilemmas in International Research: school attendance and gender in Ghana     

Morwenna Griffiths  Marie Parker‐Jenkins 《牛津教育评论》2013,39(4):441-459

abstract

The paper considers questions of ethics and methodology in international research. An action research project designed for Ghana/UNICEF as part of a consultancy on school attendance is used as a case‐study from which to examine the ethical dilemmas facing consultants and their clients in educational research carried out as part of international aid. Ethical dilemmas of resourcing, ownership, accountability and self‐interest are discussed by the English consultants. It thus has a double purpose. It both contributes to research on school attendance, and also furthers debate about methodology and constraints on it.  相似文献   

High school students’ concepts regarding food chains and food webs: a multinational study     

>Charles R. Barman  Alan K. Griffiths  Peter A. O. Okebukola 《International Journal of Science Education》2013,35(6):775-782

Abstract

The purpose of this study was to examine the views of high school students with regard to food chains and food webs. This investigation included 96 randomly selected students from three countries (32 from each country): the USA, Australia and Canada. Each subject was individually interviewed using the interviews about events method. During each interview, the investigators asked the subject a set of standard questions that was developed prior to the beginning of this study. The investigators found that most of the students from all three countries had some difficulty in providing a complete explanation of the complex feeding relationship that occurs within a food web and that some of these students revealed one or more misconceptions about these relationships.  相似文献   

School processes in providing reading support in GCSE examinations     

Dominic Griffiths  Kevin Woods 《British Journal of Special Education》2010,37(4):180-189

Against a background of increasing student eligibility for ‘access arrangements’ in examinations for the General Certificate of Secondary Education (GCSE), this article examines the processes within schools that structure a student's access to the provision of reading support, including staff and student viewpoints. Dominic Griffiths, who is a Senior Advisory Teacher with Tameside Local Authority Education Psychology and Learning Support Team, and Kevin Woods, who is a Senior Lecturer in Educational and Child Psychology at the University of Manchester, report upon a series of four case studies, each based within an urban secondary school offering some form of reading support to students in GCSE examinations. Each case study incorporates student interviews, observations of reading support in action, and interviews with staff who manage and provide reading support in examinations. Quantitative findings show an association between students' preferred mode of reading support and the location in which it is provided. Qualitative analyses revealed key themes relating to the dynamics of provision and use of reading support, including ‘student worthiness’, ‘relationships’ and ‘unfair advantage’. Recommendations are made for a more central role for student consultation within processes for providing reader support to GCSE examination candidates.  相似文献   

SVE Miniature Slide Projector     

Yvonne M. Johnson 《TechTrends》2010,54(5):17-17

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