Measurement and evaluation of whole‐body vibration exposure in drivers of cargo vehicle compositions

The present study carries out measurements and evaluations of whole‐body vibration (WBV) exposure in drivers of a cargo vehicle composition, traveling under different conditions of roads and loading, to compare and assess the health risk through the various criteria provided by vibration exposure standards. Using the acceleration data measured in the seat, the WBV exposure of the drivers is evaluated according to the criteria provided by five standards: three different versions of ISO 2631 (Part 1, 1985 and 1997; Part 5, 2004), the European Directive 2002/44/EC and the new Brazilian regulation NR‐15 published in 2014. Comparisons investigating the differences between the standards are presented. The results of the experimental data indicate that the current version of the NR‐15 is more restrictive than the other standards considered in this paper. Thus, these results can contribute to improve the criteria used in the new NR‐15.     

University students' ability-expectancy beliefs and subjective task values for exergames

The purpose of this study was to use the Eccles' expectancy-value model of choice as a framework to examine university students' expectancy beliefs and task values in exergaming systems compared to those in physical education activities. Two hundred and thirty two first-year undergraduate students at the Democritus University of Thrace completed questionnaires assessing their expectancy-related beliefs, subjective task values, and intention for future participation in the physical education and the exergames fields. Participants' activity level was also assessed using the Godin and Shephard leisure-time exercise questionnaire. Results indicated that expectancy-related beliefs and task values are positively correlated and both constructs are correlated to intention to participate in the future for the physical education and the exergames fields. Expectancy-related beliefs, task values, and intentions across fields, however, were not correlated supporting the hypothesis that exergames represent a distinct field from traditional physical education activities. Physical education was considered as more important and more useful than exergames, nevertheless inactive students found exergames to be more interesting than physical education activities. In addition inactive students had higher beliefs about ability and higher intention for future participation in exergames activities were compared to those of physical education. Conclusively, findings support the notion that exergames could be integrated into physical education and recreation programs in order to attract inactive young adults.     

基于MCGS的步进电机控制系统设计

设计了一种分层式的步进电机控制系统,现场控制层以AT89C52单片机为主控芯片,通过软件编程实现对步进电机的启停、正反转及调速控制,上位机监控层在工控组态软件MCGS平台下开发,操作界面直观友好,可以方便地对现场步进电机控制系统发布控制命令和参数;为解决现场控制层与监控层间数据交互问题,开发了基于MCGS的51单片机驱动构件;实际运行结果表明,整个系统实时性、稳定性良好,完全达到设计要求。     

A review of supply chain complexity drivers

Studies on supply chain complexity mainly use the static and dynamic complexity distinction. While static complexity describes the structure of the supply chain, the number and the variety of its components and strengths of interactions between these; the dynamic complexity represents the uncertainty in the supply chain and involves the aspects of time and randomness. This distinction is also valid when classifying the drivers of supply chain complexity according to the way they are generated. Supply chain complexity drivers (e.g., number/variety of suppliers, number/variety of customers, number/variety of interactions, conflicting policies, demand amplification, differing/conflicting/non-synchronized decisions and actions, incompatible IT systems) play a significant and varying role in dealing with complexity of the different types of supply chains (e.g., food, chemical, electronics, automotive).     

高性能IPv6路由器网络驱动设计

高性能IPv6路由器的设计与实现对我国把握下一代互联网发展的先机,保障信息产业的健康和可持续发展具有重要的意义.在分析了高性能IPv6网络驱动子系统的软件结构与实时操作系统VxWorks网络驱动程序模型END的基础上,设计与实现了支持IPv6/v4双协议栈的增强型网络驱动子系统.该驱动子系统能很好地满足高性能IPv6路由器对网络驱动值系统的要求.     

异地分布式敏捷软件开发的时间成本估算研究

为了解决异地分布式敏捷软件开发中的时间成本估算问题,研究了影响异地分布式开发时间与效率的因素,考虑了异地分布式敏捷软件开发的实际情境,对COCOMOⅡ模型的成本驱动因子进行了分析、筛选和新增,在此基础上,改进了COCOMOⅡ模型,使得改进COCOMOⅡ模型能够合理地估算出异地分布式敏捷软件开发的时间和成本,最后对改进COCOMOⅡ模型的开发时间与成本估算方法进行了实现,该改进COCOMOⅡ模型可以较好地估算出异地分布式敏捷开发中的工作量和开发进度.     

Stature and seat position as factors affecting fractionated response time in motor vehicle drivers

Motor vehicle accident fatalities are a cause for concern internationally; all drivers need to selectively attend to environmental changes, and to react swiftly and appropriately. The focus of the present paper was to investigate the effect of stature and seat positioning on fractionated response time. Eighty four young South African adults spanning a range of statures from 1.48 m to 2.00 m were tested in two extreme seat positions (near and far) using a European designed car-shell. Significant differences (p < 0.05) in knee flexion angle, but not in reaction or movement times were identified. Separation of tallest (X 1.93 m) and shortest (X 1.56 m) subjects (n = 20) revealed no significant stature-related differences in response times. However, the tall group showed significantly improved results when seated in the far position and the short group when seated in the near position. The results indicate that correct seat positioning will exert a significant effect on the overall response time of the driver, which in turn will affect the braking distance whilst driving.     

American Psychological Association Distinguished Scientific Contribution Awards, 1965.

Presents the 1965 award winners and a listing of the previous winners of the American Psychological Association Distinguished Scientific Contribution Award. The stated purpose of the awards is to honor "outstanding contributions to the science of psychology." Three award winners were announced for 1965: Floyd Henry Allport, Fritz Heider, and Paul Thomas Young. The Awards for Distinguished Scientific Contribution are presented by the Association at the Annual Convention. Each winner was presented with an engrossed citation of his formal contribution to the development of scientific psychology and a check for one thousand dollars. These psychologists have agreed, in accordance with what is established custom, to give addresses on some phase of their scientific work at the convention in 1966. The presentation of the awards was made by James J. Gibson, Chairman of the Committee for Selecting the Recipients of Awards for Outstanding Contribution to Scientific Psychology. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Paul Thomas Young: Distinguished Scientific Contribution Award.

Presents the 1965 American Psychological Association Distinguished Scientific Contribution Award to Paul Thomas Young. The citation reads: "For his lifelong study of hedonic processes in behavior. Convinced of their significance for psychology, he endeavored to give objective reference and experimental validity to the concept. Although hedonic theorizing ran counter to the prevailing temper, he persisted in the belief that the control of behavior must be analyzed for affective value as well as intensity value. His research on preference showed the effect of experience in modifying acceptability; his work on need-free organisms clarified acceptance and appetitive behavior. Most recently, he has been examining composite stimuli and preference. Current renewed interest in hedonic theory rests in good measure on his experimental demonstrations and theoretical arguments." Biographical information is also provided, along with a list of the award winner's scientific writings. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

对中国计算机事业发展的若干思考

给出了１９９８年在上海交通大学举行的第７届全国青年计算机学术会议上青年计算机学者提出的一些当前中国计算机领域面临的问题以及对策。