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111.
Wallace Hannum 《Distance Education》2009,30(1):171-173
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虚拟国际规范文档——连接德国国家图书馆和美国国会图书馆的规范文档 总被引:2,自引:0,他引:2
德国国家图书馆、美国国会图书馆和OCLC联机计算机图书馆中心联合开发了一个个人名称的虚拟国际规范文档(VIAF),它连接世界各国国家书目机构的规范记录,并免费提供网上检索,以证明自动连接不同国家规范文档的规范记录的可行性和优点.美国国会图书馆和德国国家图书馆的规范文档和书目文档被用来创建初始的VIAF,其中包括600多万个名称和50多万个连接.该项目的一个关键点是利用规范记录和其对应书目记录的信息开发自动名称匹配算法.该项目显示了用算法建立不同国家规范文档的个人名称之间连接的实用性.VIAF项目的长远目标是将许多国家图书馆和其他重要来源的规范名称结合起来,形成一个共享的全球规范服务.参考文献3. 相似文献
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Isometric tests have been used to assess rate of force development (RFD), however variation in testing methodologies are known to affect performance outcomes. The aim of this study was to assess the RFD in the isometric squat (ISqT) using two test protocols and two testing angles. Eleven participants (age: 26.8 ± 4.5 years, strength training experience: 7.1 ± 3.03 years) completed test and retest sessions one week apart, whereby two test protocols with respect to duration and instructions were compared. Isometric peak force (ISqTpeak) and isometric explosive force (ISqTexp) tests were assessed at two joint angles (knee flexion angle 100° and 125°). Force-time traces were sampled and subsequently analysed for RFD measures. Average and instantaneous RFD variables did not meet reliability minimum criteria in ISqTpeak at 100° or 125°. The ISqTexp test at 100° met reliability criteria in the RFD 0–200 and 0–250ms variables. The ISqTexp test at 125° met reliability criteria in the RFD 0–150, 0–200 and 0–250ms variables. Force-time characteristics were optimized at the higher knee joint angle. Average and instantaneous RFD measures obtained using a traditional peak force test do not meet basic reliability criteria. Researchers assessing multi-joint RFD should employ the explosive RFD test protocol as opposed to the traditional isometric peak force protocol. 相似文献
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Kenny IC Wallace ES Otto SR 《Sports biomechanics / International Society of Biomechanics in Sports》2008,7(3):322-332
The aim of this study was to determine how shaft length affects golf driving performance. A range of drivers with lengths between 1.168 m and 1.270 m, representing lengths close to the 1.219 m limit imposed by R&A Rules Limited (2008), were assembled and evaluated. Clubhead and ball launch conditions and drive distance and accuracy were determined for seven category 1 golfers (handicaps 0.21 +/- 2.41) who performed shots on a purpose-built practice hole. As shaft length increased from 1.168 m to 1.270 m, initial ball velocity increased (+ 1.8 m/s, P < 0.01). Ball carry (+ 4.3 m, P = 0.152) also increased, although not significantly so. Furthermore, as shaft length increased, for all club comparisons there was no decrease in accuracy. Ball launch conditions of spin components and launch angle remained unaffected by shaft length. Launch angle increased (0.8 degree, F = 1.074, P = 0.362) as driver shaft length increased. Our results show that clubhead and ball velocity together with ball carry tended to increase with no loss of accuracy. 相似文献
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John Wallace Rachel Sheffield Leonie Rénnie Grady Venville 《The Australian Educational Researcher》2007,34(2):29-49
In Australia, and internationally, integration is a widely promoted middle school curriculum reform strategy. Integration
is claimed to engage students by providing opportunities to work on a few cross-disciplinary objectives, to apply knowledge
across the subject boundaries and to work on tasks with meaning and relevance. While these curriculum goals enjoy a certain
popularity among middle school reformers and curriculum integration adherents, in practice, the prevalence of integration
is patchy and provisional. In this article, we (re) examine two of our studies of middle school integration over the past
decade to explore the reasons for this apparent disparity between the rhetoric and the reality. In our re-search for integration,
we look back at our data to identify enabling and inhibiting conditions for curriculum reform and develop a list of key program
characteristics. Finally, we look forward, drawing on the notion of institutional resilience to speculate on the reasons why
some middle school programs seem to flourish while others wither. 相似文献