Self-reported symptoms and risk factors for digital ischaemia among international world-class beach volleyball players

The prevalence of ischaemia-related symptoms is remarkably high among elite indoor volleyball players. Since the exposure to sport-specific demands may be higher in beach volleyball compared to indoor volleyball, the aim of this study was to assess the prevalence of ischaemia-related symptoms and associated risk factors among world-class beach volleyball players. Therefore, a questionnaire survey was performed among beach volleyball players active during the 2013 Grand Slam Beach Volleyball in the Netherlands. In total, 60 of the 128 beach volleyball players (47%) participated: 26 males and 34 females from 17 countries. The self-reported prevalence of cold or blue or pale digits in the dominant hand during or immediately after practice or competition was 38% (n = 23). Two risk factors were independently associated with symptoms of blue or pale digits: more than 14 years playing volleyball (odds ratio (OR) 4.42, 90% confidence interval (90% CI) 1.30–15.07) and sex (female) (OR 4.62, 90% CI 1.15–18.57). In conclusion, the prevalence of symptoms associated with digital ischaemia is high among international world-class beach volleyball players. Female sex and the length of the volleyball career were independently associated with an increased risk of ischaemia-related symptoms. The high prevalence of these seemingly innocuous symptoms and possible associated risk factors warrant regular monitoring since early detection can potentially prevent thromboembolic complications and irreversible tissue damage.     

食用茉莉花香味成分的GC/MS分析

采用水蒸气蒸馏-乙醚萃取法对云南引种食用茉莉花中芳香性成分进行了提取，并用气相色谱-质谱联机技术对其中化学成分进行分析鉴定．共鉴定出46种芳香性有机成分，占茉莉花挥发油提取物总含量的99．9005％．通过对食用茉莉花芳香性成分的分析，为茉莉花香精香料的开发提供了依据．     

单片机测控系统中P3口的双重使用

MCS－51系列单片机的P3口是一个双功能口，具有特殊性。当T0口（P3．4）或T1口（P3．5）作为内部定时器使用时，其口线还可作为通用输入／输出口使用。章对单片机P3口的定时器／计时器口的双重使用方法，从原理上作了详细分析，并介绍了其在真空压强、测量仪中的实际应用。解决了单片机自身口资源有限的矛盾。     

C语言中的自增/自减运算符

本文根据笔者多年的C语言编程经验,详细归纳了++/--运算符在解题过程中应注意的多个方面的事项,是对教材的一个非常有益的补充,可用于C语言教学的参考,也有助于初学者的自学。     

自主、合作、探究学习与思想政治课教学的整合

加强对"自主、合作、探究学习"理论的学习,构建"自主、合作、探究学习"的课堂教学模式,无论对自主、合作、探究学习活动的有效开展,还是对于思想政治课教学改革的整体推进,都具有十分重要的意义.     

B/S架构中基于HTML组件的WEB打印技术

一直以来B/S架构下的打印问题都是B/S系统开发中的难题,本文逐一对现有B/S架构打印方法进行了分析,针对它们的缺陷,提出丁一种基于HTML组件的更有效和更精确的打印方法,详细介绍了其原理,并给出了具体的实现方法,实践表明该方法使用效果良好.     

试论提高我国科技竞争力的若干问题

科技竞争力是当前国际国内普遍关注的一个问题.我国科技竞争力仍比较弱,在发展科学技术方面还存在若干问题.发展科学技术,提高科技竞争力要从增强科技意识、进行自主创新、加强对科技发展和运用工作的领导、健全企业技术创新机制、强化知识产权管理、科技投入多元化、加快发展高科技企业及提高全民科学文化素质等方面努力.     

富氧条件下CuO/TiZrO4催化还原NO的研究

用共沉淀法制备TiZrO4复合氧化物，并作为载体。采用等体积浸渍法担载CuO制成CuO／TiZrO。催化剂，考察其在富氧条件下以CH4作还原剂催化还原NO的性能，研究了CuO负载量、反应温度对NO转化率的影响。结果表明CuO负载量为20％时催化活性最好，反应温度为200℃时，NO转化率可达65％。     

重论"五四"新文化运动兴起的原因及其特质——一个从社会心理学角度的观察

长期以来,人们习惯于从“革命”和“启蒙”两方面去阐述“五四”新文化运动的起源与材质。第一次世界大战后中国特定的时代情绪才是这一运动爆发的直接导火线与触发剂,并以此为出发点重新梳理出“五四”新文学十年我国文学演进的脉络顺序与文学场景。     

More Powerful Tests of Simple Interaction Contrasts in the Two-Way Factorial Design

For the two-way factorial design in analysis of variance, the current article explicates and compares three methods for controlling the Type I error rate for all possible simple interaction contrasts following a statistically significant interaction, including a proposed modification to the Bonferroni procedure that increases the power of statistical tests for deconstructing interaction effects when they are of primary substantive interest. Results indicate the general superiority of the modified Bonferroni procedure over Scheffé and Roy-type procedures, where the Bonferroni and Scheffé procedures have been modified to accommodate the logical implications of a false omnibus interaction null hypothesis. An applied example is provided and considerations for applied researchers are offered.