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排序方式: 共有146条查询结果,搜索用时 206 毫秒
1.
Techtarget Todd R. Weiss 《信息系统工程》2005,(3):16
keystone公司长期停滞的ERP项目终于宣告成功, 系统将 130 个厂房,全美国2000 多员工连接在一起。回首keystone 信息化历程,其经验教训值得我们深思。 相似文献
2.
Martin Weiss Alexandra Newman Ceri Whitmore Stephan Weiss 《European Journal of Sport Science》2016,16(4):393-401
Sprint and distance running have experienced remarkable performance improvements over the past century. Attempts to forecast running performances share an almost similarly long history but have relied so far on relatively short data series. Here, we compile a comprehensive set of season-best performances for eight Olympically contested running events. With this data set, we conduct (1) an exponential time series analysis and (2) a power-law experience curve analysis to quantify the rate of past performance improvements and to forecast future performances until the year 2100. We find that the sprint and distance running performances of women and men improve exponentially with time and converge at yearly rates of 4% ± 3% and 2% ± 2%, respectively, towards their asymptotic limits. Running performances can also be modelled with the experience curve approach, yielding learning rates of 3% ± 1% and 6% ± 2% for the women's and men's events, respectively. Long-term trends suggest that: (1) women will continue to run 10–20% slower than men, (2) 9.50 s over 100 m dash may only be broken at the end of this century and (3) several middle- and long-distance records may be broken within the next two to three decades. The prospects of witnessing a sub-2 hour marathon before 2100 remain inconclusive. Our results should be interpreted cautiously as forecasting human behaviour is intrinsically uncertain. The future season-best sprint and distance running performances will continue to scatter around the trends identified here and may yield unexpected improvements of standing world records. 相似文献
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This study examined the relationships among social factors, individual differences, intrinsic motivation, and effort and persistence in the physical education context using cognitive evaluation theory as a framework. Female (n = 201) and male (n = 206) high school students completed measures of motivational climate, teaching style, perceived competence, self-determination, goal orientations, and intrinsic motivation. Teachers rated the students on effort and persistence in the class activities. Hypothesized relationships among the variables were tested using structural equation modeling. Results revealed that perceived competence and goal orientations directly predicted intrinsic motivation and mediated the effects of motivational climate and teaching style on intrinsic motivation. Intrinsic motivation directly predicted effort and persistence. Task goal orientation mediated the effects of learning climate on perceived competence and self-determination. The strongest predictors of intrinsic motivation and effort and persistence were task goal orientation perceived competence, and learning climate. 相似文献
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John Weiss 《Educational Measurement》1987,6(2):23-25
In this article, the Executive Director of FairTest, an organization that has been prominent in promoting Golden Rule-type procedures, explains what he means by the "Golden Rule bias reduction principle" and why he advocates it as a practical reform to help ensure fairer tests. 相似文献
9.
Despite the ubiquity and critical importance of science and technology in international affairs, their role receives insufficient
attention in traditional international relations curricula. There is little literature on how the relations between science,
technology, economics, politics, law and culture should be taught in an international context. Since it is impossible even
for scientists to master all the branches of natural science and engineering that affect public policy, the learning goals
of students whose primary training is in the social sciences should be to get some grounding in the natural sciences or engineering,
to master basic policy skills, to understand the basic concepts that link science and technology to their broader context,
and to gain a respect for the scientific and technological dimensions of the broader issues they are addressing. They also
need to cultivate a fearless determination to master what they need to know in order to address policy issues, an open-minded
but skeptical attitude towards the views of dueling experts, regardless of whether they agree with their politics, and (for
American students) a world-view that goes beyond a strictly U.S. perspective on international events. The Georgetown University
program in Science, Technology and International Affairs (STIA) is a unique, multi-disciplinary undergraduate liberal arts
program that embodies this approach and could be an example that other institutions of higher learning might adapt to their
own requirements. 相似文献
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