Effects of different warm-up modalities on power output during the high pull

This study compared the effects of six warm-up modalities on peak power output (PPO) during the high-pull exercise. Nine resistance-trained males completed six trials using different warm-ups: high-pull specific (HPS), cycle, whole body vibration (WBV), cycle+HPS, WBV+HPS and a control. Intramuscular temperature (T_m) was increased by 2°C using WBV or cycling. PPO, T_m and electromyography (EMG) were recorded during each trial. Two high-pulls were performed prior to and 3 min after participants completed the warm-up. The greatest increase in PPO occurred with HPS (232.8 ± 89.7 W, P < 0.001); however, this was not different to combined warm-ups (cycle+HPS 158.6 ± 121.1 W; WBV+HPS 177.3 ± 93.3 W, P = 1.00). These modalities increased PPO to a greater extent than those that did not involve HPS (all P < 0.05). HPS took the shortest time to complete, compared to the other conditions (P < 0.05). EMG did not differ from pre to post warm-up or between modalities in any of the muscles investigated. No change in T_m occurred in warm-ups that did not include cycling or WBV. These results suggest that a movement-specific warm-up improves performance more than temperature-related warm-ups. Therefore, mechanisms other than increased muscle temperature and activation may be important for improving short-term PPO.     

预冷对运动员高温环境下运动表现的影响研究

很多研究表明高温环境对运动员的运动表现是有害的,如对氧运输能力、心血管功能以及内环境和离子平衡都会造成不良影响。体育科研人员发现预冷处理能够改善运动员在高温环境下的运动表现。预冷处理是指在训练前或比赛前,预先将运动员身体做降温处理,通过降低核心体温、改善心血管压力、减少代谢失调等来调整各项生理指标,提升运动员的热贮存能力,延缓运动疲劳产生,使运动员在训练或比赛时有良好的运动表现。     

略论高校图书馆核心竞争力的提升

通过对高校图书馆核心竞争力的理论简述,分析了高校图书馆核心竞争力的内涵及其衡量标准,并从人本管理、学科馆员制度、信息化建设、知识联盟、品牌战略等方面探讨了提升高校图书馆核心竞争力的途径.     

智慧图书馆建设视角下馆员元数据核心能力构建

构建与智慧图书馆建设目标相适配、与实践需求相结合的馆员核心能力体系,能够有效促进馆员的专业化发展,对于全国智慧图书馆体系建设也具有重要意义。本文通过梳理国家级战略规划以及图书馆“十四五”发展规划,挖掘智慧图书馆建设中元数据管理需求,确定战略目标;参考元数据馆员岗位职责,分析战略目标实现过程中的各项元数据活动;基于已有馆员核心能力标准,梳理馆员元数据核心能力要素。根据布鲁姆教育目标分类法,将核心能力分为三类：能懂(记忆与理解)、能做(分析与应用)和能创新(评价与创造),构建馆员元数据核心能力框架,该框架可以作为评估馆员元数据能力的分级标准,有助于培养元数据管理人才,为智慧图书馆建设提供人才支撑。图1。表5。参考文献28。     

Validating Automated Measures of Text Complexity

Automated text complexity measurement tools (also called readability metrics) have been proposed as a way to help teachers, textbook publishers, and assessment developers select texts that are closely aligned with the new, more demanding text complexity expectations specified in the Common Core State Standards. This article examines a critical element of the validity arguments presented in support of proposed metrics: the claim that criterion text complexity scores developed from students’ responses to reading comprehension test items are reflective of the difficulties actually experienced by students while reading. Evidence that fails to support this assertion is examined, and implications relative to the goal of obtaining valid, unbiased evidence about the measurement properties of proposed readability metrics are discussed.     

Creating,implementing and integrating a first‐year statistics requirement

We present the process our institution used to create a statistics requirement for almost all incoming first‐year students. From conception and planning, to hiring and acceptance by the university community, we offer lessons learned should you consider making such a shift in your own curriculum.     

从MARC看Dublin Core

通过对MARC与Dublin Core产生的历史、定义字段方法及作用方面的对比分析，认为Dublin Core标；隹在标引各类信息资源方面有众多的优点，它将在信息管理中发挥重要作用。     

基于链接分析的网站评价研究

从排名前50位的美国商学院中,随机抽取20个,把它们主页所在网站作为研究对象, 以指向网站的网页数和网络影响因子(Web-IF)作为测定核心网站的依据。研究表明:用这两种依据来测定核心网站,所得结果基本一致;Web-IF对评价网站质量和测定核心网站具有重要价值;在计算Web-IF时应以其他网站指向被研究对象的网页数和网站在该时刻可访问到的网页数作为依据;布拉德福定律可能适用于核心网站的研究。表3。参考文献11。     

数字图书馆都柏林核心集网页文本的知识集成与检索研究

数字图书馆面临着进一步提高信息检索质量的问题,基于都柏林核心集的知识集成和检索能够发挥重要作用。结合Web网页的特点和本体知识,给出一种都柏林核心集网页文本的数据模型。词义扩展的相似匹配是当前知识检索采用的较为实用的方法,基于该模型采用词素匹配的技术并结合词义扩展的信息检索的一些技术,能使信息有效地存储集成和提高信息利用质量,能使开发的知识检索系统有更好的应用性。图1。参考文献7。     

《大学图书馆学报》1996～2006年核心著者测评

依据发文量和被引量两个计量指标,利用综合指数法测评<大学图书馆学报>1996～2006年的核心著者.