对微机房供电电源线配置的几点看法

在工程实践中,对于微型计算机机房的电源供电线路设计及施工,不仅要考虑工程的经济效益、工程的施工难度和工作环境的人身安全,而且还应考虑由于电源电路形成的杂散磁场对显示器的影响,以避免显示器的工作失常。对于不同的机房环境条件下的微机显示器的配置应采用不同的方案。     

我国优秀男子110 m栏运动员的跨栏技术分析

通过高速摄像机拍摄和录像解析刘翔、陈雁浩及我国最好成绩在14 s以内的8名优秀男子跨栏运动员的跨栏技术,并与第8届世界田径锦标赛跨栏前8名运动员比较,结果显示,我国优秀跨栏运动员的栏间时间的总均值比国外运动员快;分栏时间长而平均速度低;过栏腾空时间总平均数值长;跨栏步技术存在起跨角大、下栏距离长的问题.揭示了我国跨栏运动员技术上存在的薄弱环节,为我国的跨栏训练提供了理论依据.     

Evening electronic device use and sleep patterns in athletes

The present study aimed to investigate pre-sleep behaviours (including evening electronic device use) and sleep quantity in well-trained athletes. Seventy well-trained athletes (44 females, 26 males) aged 21 ± 4 y from a range of team and individual sports were asked to complete an online sleep diary for 7 days. The sleep diary included questions about pre-sleep behaviours (e.g. napping, caffeine intake), electronic device use in the 2 h prior to bedtime (e.g. type of device and duration of use) and sleep (e.g. time in bed, sleep onset latency). On average, athletes spent 8:20 ± 1:21 h in bed each night. Associations between age, time in bed and sleepiness suggested that younger athletes spent more time in bed (B = -0.05, p = 0.001) but felt sleepier (r = -0.32, p < 0.01) than older athletes. On average, athletes mostly used electronic devices for 0–30 min prior to sleep. The use of multiple devices in the evening was associated with more perceived difficulty in falling asleep (B = 0.22, p = 0.03), but no associations existed with other sleep variables. In summary, younger athletes may require later start times or improved sleep quality to resolve excessive sleepiness.     

Dragons at the Snack Table: Devising and Performing Magic Realism at The 52nd Street Project

“Dragons at the Snack Table” explores Magic Realism in relation to lived Applied Theatre spaces.     

普通高校体育教育专业本科学生实践能力培养的改革与创新

实践能力不仅是对人的素质的基本要求,也是培养人创新精神的基石。文章运用专家访谈、文献资料、个案分析等研究方法,对普通高校体育教育专业本科生实践能力的内涵、构成及其培养途径等进行探讨,为深化教学改革、提高人才培养质量提供参考。     

The Effect of Visual‐Chunking‐Representation Accommodation on Geometry Testing for Students with Math Disabilities

Students who struggle with learning mathematics often have difficulties with geometry problem solving, which requires strong visual imagery skills. These difficulties have been correlated with deficiencies in visual working memory. Cognitive psychology has shown that chunking of visual items accommodates students’ working memory deficits. This study investigated the effects of visual‐chunking representation as a testing accommodation for improving students’ geometry problem‐solving performance. Participants were four third‐graders with difficulties in mathematics. An adapted reversal design was employed to examine the students’ performance changes during standard testing conditions and accommodated testing conditions. During the accommodated condition, students were presented with visual‐chunking images. Results suggested that the visual‐chunking representation accommodation improved students’ performance on geometry problem‐solving tasks, and an interview confirmed students’ preference for the visual‐chunking representation approach.     

Teaching learning disabled adolescents to think critically using a problem‐solving schema

Abstract

In this study we describe and examine the effectiveness of an instructional program designed to teach learning disabled adolescents to make better personal decisions. We presented problems in short narratives based on the types of problems these students must solve in their own lives. The program, conducted as part of the students' regular resource room curriculum, incorporated schema‐general questions for problem solving coupled with practice in generating problem‐specific questions to reach an appropriate decision. Participants were 70 resource room students in two large, urban high schools. We employed a pretest‐posttest comparison group design. On the posttest, instructed students performed significantly better on (1) identifying a general schema for making a personal decision and (2) applying the schema to reach appropriate decisions concerning novel problem narratives. The results support the view that application of a general schema to specific problems can be an effective instructional method to improve critical thinking and decision making.     

The Combined Effects of Instructor Communicative Behaviors,Instructor Credibility,and Student Personality Traits on Incivility in the College Classroom

This study investigated the combined role of instructor communication variables (nonverbal immediacy and self-disclosure), instructor credibility (competence, caring, and trustworthiness), and student personality traits (extraversion, neuroticism, agreeableness, conscientiousness, and openness) in predicting students’ uncivil behaviors in class. A total of 406 students completed online questionnaires regarding the instructor of the class they attended prior to the one in which the study was administered. Personality and instructor behavior variables contributed approximately equally to explaining variance in student incivility. Students’ conscientiousness and agreeableness had direct negative relationships with incivility, whereas instructors’ amount and negativity of self-disclosure had direct positive relationships with incivility.