Exploring the effects of substituting basketball players in high-level teams

Substituting basketball players during competition is a key process to optimise collective performance. Available research on this topic is scarce, probably due to the difficulty in isolating these effects; thus, the aim of this study was to identify the temporal effects of substitutions in basketball (Spanish professional basketball league). The sample was composed of 1118 substitutions gathered from 21 basketball games. The analysed variables were coach-controlled (player and team’s personal fouls, player in and player out roles, player’s in and out minutes on-court and timeout situation); on-court (foul committed, free throws, 2- and 3-point field-goal effectiveness) and situational variables (scoreline, quality of opposition, game location and game quarter). The results showed positive scoring performances after the substitution for all the analyses. During the first quarter, there were significant effects for fouls committed, scoreline and game location after the substitution. The player’s out personal fouls, free-throw effectiveness, player in, minutes on-court player in, timeout situation and 3-point field-goal effectiveness were significant during the second quarter. The team’s personal fouls, game location, and scoreline were identified as important in the third quarter. The fourth quarter did not show significant effects on the independent variables. Current findings allow optimising coaches’ plans and team management of on-court and bench players throughout the game.     

Experimental performance of moderate and high temperature heat pump charged with refrigerant mixture BY-3

Theoretical and experimental analysis of a new refrigerant mixture BY-3 was conducted based on a single-stage vapor compression refrigeration system. The water-water heat pump system used BY-3 to produce hot water when the low temperature was 20 ℃. The following results were obtained: the highest temperature at the condenser outlet reached about 85 ℃; when the difference between the water temperatures at the condenser outlet and the evaporator inlet was less than 40 ℃, the coefficient of performance (COP) was larger than 4; when the difference reached 55 ℃, the COP still kept 3; the discharge temperature of BY-3 was lower than 100 ℃, and the refrigerant vapor pressure kept lower than 1.8 MPa. When the water temperature at the condenser outlet reached over 85 ℃, nearly a 5 ℃ superheating temperature was maintained.     

知识管理在航空新产品开发中的应用研究/FONT

回顾了国内外关于知识管理理论及知识管理与新产品开发绩效关系方面的研究成果,提出了航空新产品开发中组织要素、知识管理活动和新产品开发绩效之间关系的概念模型和理论假设,基于对航空企业和科研院所的问卷调查数据进行了定量的实证研究。结果表明：知识管理活动的各维度对新产品开发绩效有显著影响;组织结构、组织文化对知识管理活动有显著影响,但IT工具对知识管理活动的影响则不显著,限制IT工具发挥作用的主要原因是其使用的不便利性;组织要素的各维度对新产品开发绩效有显著影响。这些研究结果可以为航空企业或科研院所在推进知识管理时应采取的策略提供有益的参考。     

Emotional intelligence and academic attainment of British secondary school children: a cross-sectional survey

Trait emotional intelligence (trait EI) covers a wide range of self-perceived skills and personality dispositions such as motivation, confidence, optimism, peer relations and coping with stress. In the last few years, there has been a growing awareness that social and emotional factors play an important part in students’ academic success and it has been claimed that those with high scores on a trait EI measure perform better. This research investigated whether scores on a questionnaire measure of trait EI were related to school performance in a sample of British pupils. Results showed that high performing students had higher trait EI scores than low performing students and that some aspects of trait EI (motivation and low impulsivity) as well as total trait EI were significant predictors of academic achievement after controlling for prior attainment at school. Therefore, initiatives to develop the emotional and social abilities of schoolchildren might be worthwhile and more effective than concentrating solely on teaching and curriculum activities.     

论高校教师绩效考核量化的理论限度

高校教师绩效考核量化受科学管理理论实证主义、科学主义思潮的影响,上述理论成就的历史条件、作用对象使其在高校管理中必然存在不足,在高校教师考核中量化也不是万能的,过度量化管理,在某种程度上防碍和压制了教师工作的主动性。     

大学生异质化创业能力对创业绩效的影响——创业团队的中介作用

选取华东地区某地科技园150家大学生创业企业为样本,考察创业能力的不同维度在创业团队中介作用下对创业绩效的影响作用。结果表明,大学生异质化创业能力与创业绩效显著正相关,创业团队在创业能力对创业绩效的影响过程中起中介作用,通过创业团队可以最大化创业能力对创业绩效的提升效果。该研究丰富了公司治理与公司绩效关系理论,拓展了大学生创业能力理论研究范畴。     

非精英篮球运动员Yo Yo间歇耐力跑和运球Yo Yo跑与最大摄氧量的关系

探讨了非精英男子篮球运动员Yo-Yo间歇耐力跑测试成绩、运球Yo-Yo间歇耐力跑测试成绩的再测信度,以及与最大摄氧量的关系。受试者为31名年龄13—18岁的非精英篮球运动员。结果显示Yo-Yo跑测试速度、运球Yo-Yo跑测试速度的再测信度和典型误分别为ICC=0.76(p=0.012),TE=0.31,ICC=0.90(p=0.000 1),TE=0.23。最大摄氧量与Yo-Yo跑测试速度、运球Yo-Yo跑测试速度相关度分别为r=0.54(p=0.01),r=0.60(p=0.002)。运球Yo-Yo跑速度与Yo-Yo跑速度相关度为r=0.72(p=0.000 1),第二次运球Yo-Yo跑和Yo-Yo跑测试成绩的一致性界限范围是(-2.50,-0.93)。结果说明Yo-Yo跑测试成绩、运球Yo-Yo跑测试成绩1周内进行重测,具有较高的再现性,且Yo-Yo跑测试成绩和运球Yo-Yo跑测试成绩与最大摄氧量都具有中度相关,Yo-Yo跑测试成绩与运球Yo-Yo跑测试成绩高度显著相关。     

谈声乐演唱与钢琴伴奏的合作艺术

在声乐表演中,声乐演唱与钢琴伴奏同等重要,二者相辅相成的.只有二者之间默契合作,才能完美的演绎作品从而取得表演成功.本文就声乐演唱与钢琴伴奏如何达到完美的合作,提出自己的看法.     

企业绩效、高管人力资本特征与控制权配置——基于我国中小企业板风险企业的经验数据

本文选择了2006-2008年深市中小板块前十大股东中有风险投资持股的168家企业作为研究样本,对于企业绩效、高管人力资本特征是否影响风险投资企业控制权配置进行了实证检验.研究显示,(1)风险投资持股与企业绩效之间显著负相关,呈现出控制权安排具有相机抉择的特征,即当公司的绩效表现不佳时,风险投资者获得了更多的权力,而公司状况好转时,风险投资者的权力会释放控制权;(2)高层管理团队成员受教育水平和政治背景与风险投资企业配置权之间显著负相关,高管团队成员平均年龄和专业背景异质性对风险投资企业控制权配置影响不显著.     

跨国技术并购中吸收能力与技术绩效关系研究——基于演化博弈论

中国企业的跨国技术并购能否提升技术绩效尚无定论,文章旨在提出并验证并购后企业技术绩效提升的关键在于吸收能力。首先建立了国内并购企业和国外目标企业隐性知识共享的演化博弈模型,其动态进化稳定策略是"贡献-贡献"和"不贡献-不贡献"。知识流动动力机制分析表明,吸收能力对该演化博弈的均衡有关键影响,基于此提出如下假说:企业吸收能力是知识整合、技术提升的关键,企业吸收能力越强,并购后的技术绩效越好。然后以2004-2009年国内A股上市公司跨国技术并购的事件为样本建立了泊松回归模型,实证结果证实了如上假说。这一结果刻画了并购后的知识共享机制,证明了吸收能力是中国企业通过跨国技术并购提升技术绩效的关键。