短跑摆腿技术教学的实验研究

笔者主要通过对传统短跑摆腿技术的分析,探讨其所带来的负面影响,并运用实验对摆腿技术进行了新旧教学方法的对比分析。结果表明,采用新摆法的摆动腿抬得更高,步频更快,摆动腿的小腿扒地动作也更积极。     

频数分布表制作方法

本文论述了编制频数分布表的原则、组数和组距的确定,并通过实例对在EXCEL和SPSS10.0中如何制作频数分布表的方法作了较为详细的介绍。     

Oracle流在复杂分布式环境下共享信息的应用

随着分布式应用的不断发展,多个应用和数据库之间的信息共享是管理人员所面临的一个巨大挑战。Oracle数据库所提供的流技术很好地解决了这个问题。本文深入讨论了Or-acle流技术,分析了其设置的详细步骤,主要包括捕获、传播和应用三个阶段。     

运动技术录像解析教学实验软件的开发

运动技术录像解析是运动技术分析中的重要手段,也是大学体育专业学生应该了解和掌握的重要知识技能。但是由于受到各种条件的限制,与教学配套的相关实验并没有得到很好的实施和推广。为适用教学和实验的需要,改善当前的教学条件,作者设计了这样一个可用于运动技术录像解析教学实验的辅助软件。软件经实际使用收到了较好的教学效果。本文就是对这个软件的情况进行介绍,希望能得到同行的关注和见解。这个软件的意义并不在于理论上,而在于它的新型实用方面。     

彩色图像信号的非均匀采样和重构

计算机图像处理技术的发展，加速了情报学对图像／视频等较大信息量的快速存储、检索、应用。本文讨论将彩色数字图像信号按一定的规则分割成相同大小的子块，对其进行非均匀降速采样的过程，重采样频率的自动确定、选择原则，重构信号的质量、数据量与子块的尺寸等问题，并以实际的彩色数字图像文件全部用VC 6．0编程实现非均匀降速采样和Hermite插值重构；以实验数据得出了一些有益的结论，并进行了分析讨论。分析方法、实现程序不仅彩色数字图像文件有效，对视频信号也有效的。     

无盘网络与数字图书馆

通过无盘网络与有盘网络的比较，提出无盘网络作为新图书馆部分网络选型的解决方案以及无盘网络在数字图书馆中的应用。     

视频数据库及其应用

视频数据库是多媒体数据库研究的继承和深入。本文阐述了视频数据库研究的主要问题，介绍了视频数据库系统的发展，并通过Hampapur提出的视频数据库的框架，旨在向读者展示视频数据库的优越性以及在各方面的应用。     

How Persuasive Are Health Advertisements in First-Person Shooter Games? Exploring Knowledge-Activation and Thought-Disruption Mechanisms

This study examined whether persuasive health messages embedded in shooter games have broad or targeted effects on players’ willingness to engage in risk behaviors (N = 145). Participants presented with in-game health messages discouraging alcohol-impaired driving of motor vehicles showed reduced willingness to drink alcohol and to operate both motor and nonmotor vehicles, compared to those in a no-message gaming control condition. There were no spillover effects on willingness to smoke cigarettes or marijuana, thus implying targeted persuasive effects. In addition, players experiencing high instead of low cognitive load showed decreased postexperiment willingness to drink and operate nonmotor vehicles, thus suggesting that playing a game under high cognitive load can influence players’ attitudes. The findings replicate previous research and further expand on knowledge-activation and thought-disruption mechanisms underlying the persuasiveness of health messages.     

Social Comparisons and Need Fulfillment: Interpreting Video Game Enjoyment in the Context of Leaderboards

This study examines how social comparison information provided by video game leaderboards may influence players’ retrospective judgments of autonomy, competence, and relatedness need fulfillment. Participants played a video game and were randomly assigned to receive no postgame feedback or were shown a leaderboard that placed them in the top or bottom quartile of players. Results indicate downward social comparisons increase enjoyment by increasing competence and relatedness perceptions. However, upward comparisons did not have an opposite effect, nor did either type of social comparison influence players’ autonomy perceptions. Implications for applying Self-Determination Theory to video game enjoyment in the context of social comparison feedback is discussed.