铅球教学中采用不同质量器材的最优化探讨

在田径教学中，铅球作为基础项目．在教学中采用什么方法才能取得最佳效果，本通过在铅球教学的实践中对不同基础的同学采用不同质量器材所取得的效果进行了研究分析，介绍了达到铅球教学效果的最优化的方法。     

Effects of 10-week eccentric overload training on kinetic parameters during change of direction in football players

ABSTRACT

The aim of the current study was to analyse the effect of 10-week eccentric overload training on kinetic parameters during change of direction (COD) in U-19 football players. The outcome measured included relative peak braking (rPB) and propulsive force (rPF), contact time (CT), time spent during braking (BT) and propulsive phase (PT), relative total (rTOT_IMP), braking (rB_IMP) and propulsive (rP_IMP) impulses. Between-group results showed a substantial better improvement (likely) in CT (ES: 0.72) and BT (ES: 0.74) during side-step cutting, and in rPB (ES: 0.84) and rB_IMP (ES: 0.72) during crossover cutting, in the experimental group (EXP) in comparison to control group (CON). Within-group analysis showed a substantially better performance (likely to almost certain) in CT (ES: 1.19), BT (ES: 1.24), PT (ES: 0.70), rPB (ES: 0.75), rPF (ES: 0.68), rTOT_IMP (ES: 0.48) and rB_IMP (ES: 0.50) in EXP during side-step cutting. Regarding crossover cutting, within-group analysis showed a substantial better performance (likely to almost certain) in CT (ES: 0.75), rPB (ES: 0.75), rPF (ES: 1.34), rTOT_IMP (ES: 0.61), rB_IMP (ES: 0.76) and rP_IMP (ES: 0.46) in EXP. In conclusion, the eccentric overload-based programme led to an improvement in kinetic parameters during COD football tasks.     

No time to think: Reflections on information technology and contemplative scholarship

This paper argues that the accelerating pace of life is reducing the time for thoughtful reflection, and in particular for contemplative scholarship, within the academy. It notes that the loss of time to think is occurring at exactly the moment when scholars, educators, and students have gained access to digital tools of great value to scholarship. It goes on to explore how and why both of these facts might be true, what it says about the nature of scholarship, and what might be done to address this state of affairs.     

Chapter Ten

No abstract available for this article.     

C++程序设计中的多态性技术探讨

在C 程序设计中,多态性理解为不同函数的同一接口。C 语言支持两种多态性：编译时的多态性和运行时的多态性,本文分别给予详细介绍。通过重栽函数、重载运算符和虚函数三个方面对比介绍,能深入领会到多态性的意义和实现,并重点阐述了C 中虚函数的来龙去脉。     

曲棍球运动创伤的流行病学研究

对国家队等9支曲棍球队共121名运动员进行了运动创伤流行病学调查,共查出111处损伤,48种伤病,总发病率为60.33％。其中腰肌筋膜炎发病率最高,为12.173％。损伤病因中训练过度致伤占首位,为35.897％。此外,与误伤、技术失误及场地因素亦有明显关系。     

信息超载与图书馆的应对方案

介绍信息超载的定义，探讨信息超载的原因及后果，提出图书馆解决学术信息超载的方案。     

我国公路超载超限的经济学解释及长效治理机制构建

公路超载超限问题及其治理是我国经济转型过程中暴露出的一大公共问题,本文首先运用经济学的逻辑方法,从公路的公共性、私人供给的可能性、公路的维护及运营、超载超限的外部性、治理难、公路系统利益链等角度对我国公路超载超限及对其治理问题做出了经济学解释;然后,按照市场配置和组织控制的划分基本市场主体的原理,将我国公路运行的有关系统进行分类和梳理,在明确各系统的关系的基础上,构建治理模型。以期从理论上系统认识这一问题,为构建治理长效机制提供理论依据。     

超限超载入刑的理由与路径

超载超限是道路交通中的一种违法行为,严重危害了社会安全。但现行以行政为主导的治超模式存在许多问题,在长期的治理实践中收效甚微。因此应借鉴域外治超的经验,考虑将超限超载入刑,追究行为人的刑事责任。在超限超载入刑的路径选择方面,应列为＂危险驾驶罪＂的一种情形。并且针对当前＂双超＂难以治理的现状,在犯罪类型上考虑设立为抽象危险犯更为适宜。尤为重要的是,在超限超载入刑的同时,还需完善其他配套措施,以充分发挥入刑的积极作用。     

Contextualized impacts of an infodemic on vaccine hesitancy: The moderating role of socioeconomic and cultural factors

This study examines how perceived information overload and misinformation affect vaccine hesitancy and how this is moderated by structural and cultural factors. By applying and extending the fundamental cause theory, this study proposes a contextualized impact model to analyze a cross-national survey of 6034 residents in six societies in Asia, Europe and North America in June 2021. The study finds that (1) Older and highly-educated participants were less susceptible to COVID-19 information overload and belief in vaccine misinformation. (2) Perceived information overload led to an increase in vaccine acceptance and uptake, whereas belief in vaccine misinformation caused a decrease. (3) The structural differentiation of vaccine hesitancy was salient and higher socioeconomic status could buffer the negative impact of misinformation on vaccine acceptance. (4) Cultural factors such as collectivism and authoritarian mentality also served as buffers against the misinformation that reduced vaccine acceptance and uptake. These findings add nuanced footnotes to the fundamental causes theory and contribute to the discussion on the global recovery from the infodemic. Besides fact-checking and improving individual information literacy, effective and long-term information management and health policies must pay attention to stratified information gaps across socioeconomic groups, and to contextualize the communication and intervention strategies in different cultures.