Organizing A Painting Set-Up For Young Children

The purpose of this study was to compare the perceptions of teacher competence within and among three groups of educators (teachers, college supervisors, and public school administrators) as measured by the interview scales of the Instrument for the Observation of Teaching Activities (IOTA) . Six teachers were interviewed, and the interviews were recorded on video tape. Thirty educators, stratified into three groups, and randomly selected from those trained in use of the Instrument, scored the taped interviews. A reliability coefficient for each group of recorders and for the total of the three groups of recorders was calculated from the statistics generated by a three-way analysis of variance. A two-way analysis of variance was then utilized to test for the significance of differences among the three groups of recorders and within each group of recorders and within all recorders on each individual scale. The major findings and conclusions of this study were as follows: 1.) The reliability coefficients as determined by the three-way analysis of variance for each of the three groups and for the total (30) recorders indicated a difference in perception as follows: administrators, .773; teachers, .618; college supervisors, .952; total (30) recorders, .961; 2.) the interview, normally considered a qualitative tool, can be evaluated with quantitative techniques; and 3.) administrators, teachers, and college supervisors perceive many areas of teacher competence similarly.     

录像带的正确选购使用与保管

阐述了录像带的选购、使用和保管方法，既可选购优质录像带，又可避免或减少不必要的损失。     

数字录像机的分类和特点

广播电视正在走向数字化,电视节目制作过程中越来越多地采用数字技术和设备.目前MPEG-2、M-JPEG和DV三种压缩方式被广泛应用于电视领域,码率压缩数字录像机主要有Sony的DigitalBetacam、BetacamSX、DVCAM、MPEGIMX,松下的DVCPRO、DVCPRO 50和JVC的D-9.本文比较详细的介绍了以上几种数字录象机不同特点和市场上的一些主流机型,以及如何选择和升级数字电视系统.     

课堂教学录像的摄制

介绍了课堂教学录像的摄制准备工作和单机、双机摄录方法。     

Infant Temperament and Genetics: An Objective Twin Study of Motor Activity Level

Child temperament theories generally presume genetic contributions to behavioral differences, but empirical support is based largely on parent ratings of twins. These subjective ratings may be biased by parental exaggeration of dizygotic differences or of monozygotic similarities. An objective assessment of the genetic hypothesis was undertaken with motor activity level, a core dimension of most temperament theories. The activity level of 60 infant twin pairs was measured both by parent ratings and by motion recorders over a 2-day period. Data from the motion recorders showed evidence of genetic influences (RMZ = .76, RDZ = .56), as did parent ratings (RMZ = .82, RDZ = .21). The motion recorder results confirm with instrumentation a critical assumption of temperament theories and identify the presence of genetic contributors to temperamentally relevant behavioral differences in infancy.     

论司马迁的著史精神对新闻记者的影响

今天的新闻就是明天的历史,新闻记者是正在发生的历史的记录者。因此,司马迁在《史记》创作中体现出来的深入实际、尊重客观和不畏强权的精神对新闻记者有着学习、借鉴的实际意义。     

汽车行驶记录仪及其在典型路况上的记录曲线分析

介绍了汽车行驶记录仪在我国的应用情况,并通过对一辆装有汽车行驶记录仪的奔驰大客车的实际行驶记录,分析了几种典型路况的行驶记录曲线。     

浉河港出土具铭青铜器的文化意义

铭文中的古文字资料,真实地铭记着铭文制作人所感知的社会生活。浉河港乡1986年出土的11件具铭青铜器,不仅有着西周早期罕见的礼器,丰富了西周早期铜器断代的标准器内容,而且还反映着家族迁移的环节或历史,具有重要的文化意义。     

锌锰电池性能的比较

通过放电测试对比了碱性锌锰电池和普通锌锰电池的性能,讨论放电模式和环境温度对电池性能的影响.相同放电模式下,普通锌锰电池的性能相差不明显,而碱性锌锰电池的性能明显优于普通锌锰电池;在0～50℃范围内,干电池的高温性能明显好于低温性能.     

锌锰电池缓蚀剂的研究与进展

锌锰电池中汞作为缓蚀剂对锌电极有重大影响，无汞电池需要高效代汞缓蚀剂。本文综述了锌锰电池中的锌缓蚀剂的研究与发展，介绍了当前无机、有机缓蚀剂的应用。     

废旧干电池的回收利用

综述了电池的种类，强调废旧电池对环境造成的污染，介绍了目前废旧电池的回收利用技术。针对我国是世界上千电池生产量及消费量最大的国家，提出了回收利用废旧电池的几点建议。     

镁表面耐腐蚀性能的研究

纯镁及AZ61镁合金在磷酸盐中形成转化膜后,分别在水、碱溶液及钒盐溶液中进行封闭处理.采用点滴腐蚀试验、孔隙率测试和模拟海水浸泡法对封闭后的膜层的耐腐蚀性能进行研究,用显微镜对腐蚀前后的微观形貌进行了观察,讨论了腐蚀机理.试验表明,在水中封闭的膜层的耐蚀性最好,膜层的孔隙率最低;纯镁的表面转化膜层的耐海水腐蚀性能比镁合金AZ61的表面转化膜层耐海水腐蚀性能好.     

Comparing the Effects of Classroom Audio-Recording and Video-Recording on Preservice Teachers' Reflection of Practice

This study examined the effects of audio and video self-recording on preservice teachers' written reflections. Participants (n = 201) came from a secondary teaching methods course and its school-based (clinical) fieldwork. The audio group (n_A = 106) used audio recorders to monitor their teaching in fieldwork placements; the video group (n_V = 95) used video recorders. Qualitative methods (content analysis) of the reflections found that preservice teachers gave varied attention to curricular decisions, question/response patterns, wait time, mannerisms, nervousness, and use of praise. Quantitative analyses (chi-square tests for independence) indicate the recording format did not lead to significant differences in participants' reflection on their various instructional behaviors except for two aspects: the video group gave more attention to non-verbal behaviors and movement around the classroom (α = .05). Implications are discussed, including methods for enhancing the habit of teachers recording and reflecting in teacher education.     

Moment-to-Moment Counseling Process Feedback Using a Dual-Channel Audiotape Recording

A survey of 28 counseling practicum students revealed that although their most time-intensive training activity was listening to postsession audiotapes, it ranked fifth on perceived effectiveness, with supervisor feedback ranking first. This study outlines a method of combining the time-intensity of audiotape playback with direct supervisor feedback using dual-channel (stereophonic) tape recorders in the counseling laboratory. Posttreatment assessment indicated strong student support for this method.     

Evaluation and Analysis of Battery Technologies Applied to Grid-Level Energy Storage Systems Based on Rough Set Theory

Interest in the development of grid-level energy storage systems has increased over the years.As one of the most popular energy storage technologies currently available,batteries offer a number of high-value opportunities due to their rapid responses,flexible installation,and excellent performances.However,because of the complexity,multifunctionality,and wide deployment of power grids,trade-offs in battery performance exist,especially when considering economics,environmental effects,and safety.Therefore,establishing a comprehensive assessment of battery technologies is an urgent undertaking.In this work,we present an analysis of rough sets to evaluate the integration of battery systems(e.g.,lead-acid batteries,lithium-ion batteries,nickel/metal-hydrogen batteries,zinc-air batteries,and Na-S batteries) into a power grid.Specifically,technological properties,economic significance,environmental effects,and safety of these battery systems are evaluated on the basis of rough set theory.In addition,some perspectives are provided to promote the development of battery technologies for grid-level energy storage.     

锂离子二次电池负极材料及电解质研究

综述了锂离子二次电池负极材料和电介质的研究现状 ,对现行研究和应用的二次锂电池负极材料、电解质中存在的问题进行了深入分析并对材料的分类、特点和发展方向进行了研究     

伊朗高锰钢辙叉的结构研究

伊朗辙叉的开发生产采用真空密封造型,由于其宽拉筋板结构和趾跟端三岔口结构不利于采用真空密封造型方法,辙叉在生产中产生了大量偏皮、掉砂缺陷和废品。对此,文章通过对伊朗辙叉的结构分析和真空密封造型工艺研究,提出了具体解决方法。     

A Review on Applications of Layered Phosphorus in Energy Storage

Phosphorus in energy storage has received widespread attention in recent years. Both the high specific capacity and ion mobility of phosphorus may lead to a breakthrough in energy storage materials. Black phosphorus, an allotrope of phosphorus, has a sheet-like structure similar to graphite. In this review, we describe the structure and properties of black phosphorus and characteristics of the conductive electrode material, including theoretical calculation and analysis. The research progress in various ion batteries, including lithium-sulfur batteries, lithium–air batteries, and supercapacitors, is summarized according to the introduction of black phosphorus materials in different electrochemical applications. Among them, with the introduction of black phosphorus in lithium-ion batteries and sodium-ion batteries, the research on the properties of black phosphorus and carbon composite is introduced. Based on the summary, the future development trend and potential of black phosphorus materials in the field of electrochemistry are analyzed.     

简论档案的“死”与“活”

高等学校的档案资料,全面真实地记载了学校发展的历史。只有充分发挥档案资料在教学、科研、管理、服务社会等方面的作用,重新激活大量积存的档案资料的育人功能,将看似过时的＂死档案＂用活用足,档案和档案管理的功能才能够充分显现出来。新建院校的本科教学合格评估,是检验高校档案工作日常运行质量、管理手段及其效能的试金石,是全方位体现高校档案功能的一项综合工程。     

X（S）M55-30型橡胶密炼机密炼室的改进设计

X（S）M55—30型密炼机在生产使用过程中存在密炼室密闭不够和串水腔漏水、密炼室冷却速度较慢、密炼室转子轴轴承安装调试困难以及密封方式过于复杂等问题。针对以上问题,文章提出了密炼室结构、转子轴的轴承选择和密封装置以及密炼室的冷却方式等改进设计方案。