摄像头在研究平抛物体的运动实验中的应用

介绍了利用摄像头自己安装驱动程序用于传统实验——“研究平抛物体的运动”的实践经验。     

儿童钢琴弹奏中基本手型形成的一些建议

在钢琴教学中,强调固定基本手型的同时,随着钢琴作品难度的增加和各种弹奏技术的需要,还应教会学生不断调节手型的开合和屈伸,使他们的两只手从“自然“走向“规范“,最终达到得心应手.     

工程造价失控的原因分析与对策

工程造价失控是当前我国投资领域的普遍现象.从基本建设各阶段分析了工程造价失控的原因,并提出了各阶段控制工程造价的措施是十分有益的.     

Taking care of youth mentoring relationships: red flags,repair, and respectful resolution

Mentoring is portrayed in the literature as benefiting young people, but ineffective or early termination of youth mentoring relationships can be detrimental. Researchers have not adequately explored issues surrounding the breakdown of youth mentoring relationships. Underpinned by a socio-ecological perspective, in this exploratory study we consider the various contexts within which these important relationships exist and identify early warning signs or red flags that a mentoring relationship is struggling. We interviewed mentees, mentors, and coordinators from four Western Australian youth mentoring programs about their experiences of mentoring relationships. Our findings suggest that red flags and repair strategies may be specific to particular programs, and that program coordinators play an important role in supporting relationships. Our research will help youth mentoring programs work toward early intervention strategies or appropriate and respectful termination of a relationship.     

Effects of Gamma-Ray Irradiation on Dielectric Surface Breakdown of Polybutylene Naphthalate and Polybutylene Terephthalate Under Reduced Pressure

A dielectric breakdown phenomenon on polymer sur-faces calledtrackingfailure was observed[1].Itis caused bycarbonized conductive tracks formed on their surfaces .Whensufficientlyintensive discharge lasted for a consider-abletime ,the decomposedcarbon prod…     

浅谈有线电视系统的日常技术维护与管理

本文介绍有线电视系统日常技术维护的内容与方法,阐述如何建立健全系统管理的措施．     

大学英语教师职业倦怠现状的调查与研究

采用整群抽样法,利用中式职业倦怠量表（CMBI）对270名大学英语教师的职业倦怠状况及影响因素进行初步调查研究。结果发现：大学英语教师职业倦怠水平达轻中度,检出率为75.4%;性别、婚姻状况在个人成就感降低维度上有显著性差异;学历、教龄在耗竭维度上有显著性差异;职称、学校类型在职业倦怠三个维度上均产生差异,但并不显著。     

基于CAD软件系统的组合夹具装夹稳定性校验

提出了在计算机辅助夹具设计中自动校验夹紧稳定性的方法.当用CAD软件系统设计组合夹具时,通过对夹紧力和定位支承反作用力之间的平衡作出评估,即可判定系统的定位可靠性.     

键槽加工的定位与对刀

介绍用键定位、借助直角尺与工件中心对刀加工轴类零件外圆键槽，借助定位工装用弦定位加工盘类零件键槽的方法，从而提高生产效率和产品合格率。     

Study of Cellular Experiment of Electric Pulse Imposed on Cancer Cell

The objective of the study is the cytocidal and inhibitory effect of energy-controllable pulse on ovarian cancer cell line SKOV3.Ovarian cancer cell suspension were treated by electric pulse with different parameters,.The inhibitory rate(IR) was assayed by modified colorimetric MTT methods,the growth curves of two test groups and one control group were also measured.and the ultrasturctureal changes were observed under electron microscopy(EM) and scan electron microscopy (SEM),It was found that the treated SKOV3 cell proliferated more slowly.IR was increased with the enhancement of pulse paramters,The ultrastructural study showed that morphological changes occured obviously.Swollen mitochondria,fracutured ridges,cytoplasmic vacuoles and membrane holes appeard in most of the processed cells,and a part of bilayer membrane was ruptured.It is indicated that irreversible electric breakdown occurred in some of the treated cells,and the electric pulse could kill cancer cell and inhibit its recovery and growth.