Design and Realization of InP/AlGaInAs Multiple Quantum Well Ring Laser

Using beam propagation method(BPM), key optical design parameters of InP/AlGaInAs multiple quantum well(MQW) ring laser were numerically analyzed. The influences of waveguide dimensions, curvature radius and gap size on the coupling efficiency were discussed. An InP/AlGaInAs MQW ring laser with radius of 350 μm was designed and realized. The experimental results show that the designed device, lasing at 1 563.2 nm with side mode suppression ratio higher than 20 dB, exhibited unidirectional bistability between the clockwise and counterclockwise modes.     

Physical Education Teacher Attitudes toward Fitness Tests Scale: Cross-Revalidation and Modification

This study aimed to provide further evidence of validity and reliability for the Physical Education Teacher Attitudes toward Fitness Tests Scale (PETAFTS), which consisted of affective and cognitive domains. There were two subdomains in the affective domain (i.e., enjoyment of implementing fitness tests and enjoyment of using test results) and one domain in the cognitive domain (i.e., beliefs in the usefulness of test results). Full-time physical education teachers (N?=?469) from two southwestern states in the United States participated in the study. Reliability and validity of the scale were examined. Alphas were computed for the entire 16-item scale, the affective and cognitive domains, and the two subdomains, respectively, to test the reliability. Confirmatory factor analysis (CFA) was employed to investigate the construct validity. The commonly used CFA indices, such as the chi square (χ²), the comparative fit index (CFI), the Tucker-Lewis Index (TLI), the goodness of fit index (GFI), and the root mean square error of approximation (RMSEA), were used to assess the fit of the data to the model. The CFA results suggested that the data from the study did not fit the original model proposed by Keating and Silverman (2004b) Keating, X. D. and Silverman, S. 2004b. Physical education teacher attitudes toward fitness test scale: Development and validation. Journal of Teaching in Physical Education, 23: 143–161. [Web of Science ®] , [Google Scholar], resulting in the elimination of item 3. The fitness of the data to the model was improved and deemed acceptable. More studies on the reliability and validity of the scale are needed in the future in order to use the scale with more confidence.     

高校体育对大学生心理健康教育影响与作用探讨

从高校体育学科发展建设角度出发,运用体育学,教育心理学,保健学的理论知识与研究成果,采用文献资料研究,社会调查,专家访谈和比较分析等研究方法,探讨对大学生心理健康教育影响的积极效应和促进作用,试图为高校体育开展心理健康教育提供依据。     

军队继续教育发展策略探讨

人才是兴军之本,教育是兴军之道,继续教育在我军干部培训工作中占有重要的地位。军委、总部赋予军队院校开展继续教育的职能,明确军事院校承担继续教育训练任务,有利于军队继续教育系统化、制度化和规范化,从而促进军队又好又快地发展。本文在分析继续教育的性质特点和我军开展继续教育的重要意义的基础上,结合我军继续教育存在的不足来探讨我军开展继续教育的策略问题。     

关于高校图书馆资源重新整合的探讨

本文通过对合并后高校图书馆资源重新整合现状的分析,重点探讨了高校图书馆人力资源的重新整合与馆藏资源结构的重新整合等问题。     

档案职业伦理刍议

职业伦理是一种特殊的社会意识形态,对于职业的生存与发展有着特殊的意义。档案职业的基本伦理原则包括求实保真原则、主动服务原则与尊重权益原则三个方面的内容。档案职业伦理建设是档案职业的一项重要的生存之策,文章就有关方面作了论述。     

浅谈网络安全

随着Internet/Intranet以及其他网络技术的飞速发展和网络越来越多的应用,网络安全(Network Security)已经成为信息时代的一个具有重要实际意义的话题。他是一门涉及计算机科学、网络技术、通信技术、密码技术、信息安全技术、应用数学、数论、信息论等多种学科的综合性科学。从总体上,网络安全可以分成两大方面:网络攻击技术和网络防御技术,只有全面把握两方面的内容,才能真正掌握计算机网络安全技术。本文分析目前存在网络安全问题,分析WINDOWS系统漏洞、攻击技术、防御技术。     

开拓创新做好高校团的思想政治工作

本文对高校学生思想政治工作中存在的问题进行思考,并从高校团务工作者的角度,对如何在新形势下做好青年学生的思想政治工作提出了几点建议,以期促进团的工作的进一步开展.     

以支撑脚为参考系的轮滑双蹬技术外刃蹬地动作力学分析

探究轮滑运动双蹬技术的外刃蹬地动作是否提高了运动员在前进方向上的速度,运用力学知识对运动员在外刃蹬地时的受力情况、步长、做功、速度和动能的变化进行分析。结果:在假设各种阻力为零的条件下,以支撑脚为参考系,运动员外刃蹬地时身体重心在支撑反作用力的水平分力方向上位移为零,在支撑反作用力水平分力作用的方向上身体重心的速度为零,支撑反作用力的水平分力所做的功为零,身体重心在支撑腿滑进方向上的速度大小没有变化,动能没有增加。结论:在假设各种阻力为零的条件下,以支撑脚为参考系,运动员外刃蹬地时身体重心的合速度没有增大,动能没有增加。     

拨开历史的迷雾--评吴立昌著《人间云雾》

吴立昌教投对沈从文研究和精神分析学与中国现代文学的关系两个领域具开拓之功却并不居功自傲，凸显二十多年来吴立昌对历史本真执着追求的学术人格和淡泊的人生态度。