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431.
This article provides a systematic review of existing research related to the implementation of IT Service Management (ITSM) and the Information Technology Infrastructure Library (ITIL). The review's main goals are to support research; to facilitate other researchers’ search for relevant studies; and to propose areas for future studies within this area. In addition, we provide IT managers with useful information on ITSM and ITIL, based on research-based knowledge of their implementation. The review results suggest that motives, critical success factors, implementation status, and benefits are the most frequently studied areas, and that each of these areas would benefit from further exposure.  相似文献   
432.
433.
This paper overviews the importance for sports biomechanics of movement variability, which has been studied for some time by cognitive and ecological motor skills specialists but, until quite recently, had somewhat been overlooked by sports biomechanists. The paper considers biomechanics research reporting inter- and intra-individual movement variability in javelin and discus throwing, basketball shooting, and locomotion. The overview does not claim to be comprehensive and we exclude such issues as the theoretical background to movement and coordination variability and their measurement. We overview evidence, both theoretical and empirical, of inter-individual movement variability in seeking to achieve the same task goal, in contrast to the concept of "optimal" movement patterns. Furthermore, even elite athletes cannot reproduce identical movement patterns after many years of training, contradicting the ideas of motor invariance and "representative" trials. We contend that movement variability, far from being solely due to neuromuscular system or measurement "noise"--as sports biomechanists may have previously supposed--is, or could be, functional. Such functionality could allow environmental adaptations, reduce injury risk, and facilitate changes in coordination patterns. We conclude by recommending that sports biomechanists should focus more of their research on movement variability and on important related topics, such as control and coordination of movement, and implications for practice and skill learning.  相似文献   
434.
435.
Movies like "Animal House" and "Revenge Of The Nerds" illustrate the prettier parts of college life: The parties, the men, the women, the good times. But then there are the dark clouds surrounding the college experience: The bad food, the hangovers, the beer goggles, and—worst of all—the evil roommate. As horrible as mystery meat, mornings after and anonymous(无名的) hookups may be, there's nothing more damaging to your life at college than living with a nasty roommate.  相似文献   
436.
Professionals were once considered to be the civic leaders, the deliverers of the good society. However, the old order has cracked under the pressure of social change, leaving a very different relation between professionals and their publics. This paper addresses some of the questions occasioned by these changes: Where does the altered power relation between parents, students and teachers leave the notion of teacher professionalism? What is the role of professionals within the emergent order? The paper is a product of the ESRC‐funded New Forms of Education Management Project (Local Governance Programme). It argues that, within the new management of education, the professional codes and practices point to a changing relation between teachers and what has traditionally been seen as their specialist knowledge. An outcome of this altered relation is the empowerment of parents and students in relation to teachers. However, the new relation depends upon new shared understandings and new sets of agreements; and these in turn depend upon new processes of agreement‐making and a radically altered power relation between parents, students and teachers as they jointly develop these processes. The paper reviews the changing purposes of professionalism during the second half of the 20th century and outlines a new version of teacher professionality based upon the enabling of learning, the accommodation of difference, and the practice of agreement. Agreement is then ‘theorised’ in terms of the nature of agreement and the institutional structuring of agreement.  相似文献   
437.
This study sought to determine the association of relative age and performance of young elite basketball players. The distribution of the birth dates, heights, positions, classification and performance of the male and female participants (n = 2395) of the U16, U18 and U20 European Basketball Championships were analysed. We found an over-representation of players born during the initial months of the year in all groups, with the relative age effect being more evident in players of the U16 and U18 groups, than of the U20 teams, particularly in male squads. Nevertheless, in the U20 championships, those teams that had the oldest players performed the best. In all championships, the oldest participants played more minutes. In addition, relatively older male players scored better in total points and in performance index rating when results were normalised to played time. This effect was not found for female players. Regarding playing position, different distributions of birth dates were observed due to each position’s physical requirements. Thus, basketball coaches and managers should keep these results in mind when they select players because if not, they might subject players who are born towards the end of the year to a negative selection bias.  相似文献   
438.
In the UK, there is great concern about the perceived increase in plagiarized work being submitted by students in higher educations. Although there is much debate, the reasons for the perceived change are not completely clear. Here we present the results of a 2‐year trial of the JISC Plagiarism Detection Service (PDS) involving hundreds of students. The effectiveness of the service in detecting plagiarized material and in acting as a deterrent are discussed. Although an increased number of cases of plagiarism were detected during the trial, the relative contributions of the electronic detection system and increased staff awareness remain unknown.  相似文献   
439.
本文对基于网络的流媒体技术的传输特性加以概括分析,针对目前高校网络视频教学中的运用进行阐释,并提出了现代信息技术与教学相结合以及流媒体技术在多媒体网络教学模式的应用前景。  相似文献   
440.
Thirty colonies, each consisting of a female and two male adult albino rats, remained intact for an 8-week period. Naive conspecific intruders were then introduced into each colony for a 10-min test for 5 consecutive days. Videotapes of the tests were scored for aggressive and defensive behaviors. In every colony, aggression was greatest for a single alpha male. The alpha rats were randomly given one of three treatments: wheel-turn escape training, inescapable yoked shock, or restraint without shock. The alpha rats were then returned to their colonies and an intruder test was given 26 h later. Significant decreases in aggressive responses and increases in defensive behaviors occurred in the alpha yoked group but not in the other alpha groups. The nonalpha colony partners of the alpha yoked rats showed the opposite changes following the treatment. A final intruder test 72 h later revealed that the deficits in aggression of the alpha yoked group were still present but that the behaviors of most of the other groups were beginning to return to their respective pretreatment levels. These findings were discussed in terms of the concept of learned helplessness and alternative theoretical explanations.  相似文献   
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