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.     

教育经济学视角中的成人教育管理变革

在成人教育需求、成人教育资源配置方式、成人教育投资等教育经济学视角中,成人教育管理理念变革要遵循集权与分权、干预与调控有机结合的原则;成人教育管理体制变革要赋予成人教育办学主体自主权,发挥市场配置成人教育资源的作用,贯彻“谁投资谁受益”原则,建立宏观管理机构与调控体系。     

欧盟科技创新中公私合作模式研究

针对欧盟科技创新领域,从发展概况、发展目标、公私投入总额及配比、效果及影响等角度,揭示运用公 私合作模式的重大科技计划的发展成效。通过总结欧盟运用公私合作实施重大科技计划的经验,分析国内相关形势, 为我国科技领域运用公私合作实现战略性技术快速发展提供参考建议。     

A dynamic decision model for portfolio investment and assets management

This paper addresses a dynamic portfolio investment problem. It discusses how we can dynamically choose candidate assets, achieve the possible maximum revenue and reduce the risk to the minimum level. The paper generalizes Markowitz's portfolio selection theory and Sharpe's rule for investment decision. An analytical solution is presented to show how an institutional or individual investor can combine Markowitz's portfolio selection theory, generalized Sharpe's rule and Value-at-Risk(VaR) to find candidate assets and optimal level of position sizes for investment (dis-investment). The result shows that the generalized Markowitz's portfolio selection theory and generalized Sharpe's rule improve decision making for investment.     

外商直接投资对我国产业集群发展的影响及对策

外商直接投资对我国地方产业集群的形成和发展起到了重要的推动作用，但外资拉动型产业集群也存在外资根植性差、与本地企业关联度低、外资企业凭借技术优势压制内资企业的利益空间、集群发展缺乏稳定性和可持续性等问题。因此必须加强集群的环境建设，增强内、外资企业的配套关联度，提高外资的社会网络根植性水平，同时要积极推进本地中小企业科技进步，建立并维护集群内自律机制，改善内资企业在集群内的不利地位，避免内资企业间的恶性竞争。     

工程承包投标的决策分析

利用决策树方法计算了在工程承包投标过程中各方案的期望值大小。并对投标风险进行了分析；利用回归分析分析了投标前投标费用的确定方法。     

福建城市投资环境比较研究

本文从城市投资环境的基本理论着手,建立福建城市投资环境的综合评价指标体系.应用主成分分析法,对福建省9个设区城市的投资环境进行综合评价和排序,得出各城市投资环境的优越性及存在问题,对如何进一步改善投资环境提出建议.     

安徽省与周边省份资本分布情况比较研究

将安徽、山东、江苏、江西四省并列,对90年代以来影响各省资本分布的各个因素:区域经济增长差异、财政转移支付差异、信贷投放差异、外商直接投资利用差异进行了深入分析并对四者所反映出来的情况与问题做了系统研究,从而发现从中央财政支付转移的角度看,山东、江苏二省每年都有相当数额的财政收入上缴中央政府,而安徽、江西二省2000年以来每年都接受大量的中央政府财政补贴,并有逐年增大的趋势.从银行及其资本渠道来看,四省均出现资本外流现象.     

论高校后勤人力资本投资与收益的不对称性

当前我国高校后勤人力资本投资与收益不对称性的主要原因是:目前的管理体制约束了人力资本投资的不足,劳动收益的不对称造成人力资本的进一步流失,从而影响了经济的发展。高校可采取加大人力资本投资、加强人事制度改革、建立健全激励机制、增强企业文化建设等一系列措施来克服这一矛盾。     

注册会计师职业判断的运用研究

新会计制度的颁布实施,增大了会计处理的选择空间。会计人员运用专业理论知识和实践经验进行职业判断的内容也有所增加,从而必然对审计人员的专业判断能力提出更高的要求。注册会计师的职业判断尤为重要,它贯穿于审计工作的全过程,具有广泛的应用范围。