面向保障方案评价的综合研讨厅

本文分析了保障方案内涵及保障方案评价的现状,提出建立面向保障方案评价的综合研讨厅,以解决保障方案评价问题,并对面向保障方案评价的综合研讨厅进行了总体设计,确立了其用户、功能模块及体系结构.     

变温条件下半导体霍尔系数及载流子浓度的测量

利用简单的加热装置改装HL—IV型霍尔效应实验仪,利用改装后实验仪器测量不同温度条件下的半导体霍尔系数及其载流子浓度。     

基于MSP430单片机的电机智能转速监测系统设计

设计一种由MSP430单片机构成的智能转速监测系统．该系统由与电机同轴的齿轮信号盘和霍尔转速传感器组成,对霍尔转速传感器输出的信号进行滤波和整形,使处理后的信号转换成标准的方波信号,隔离后由单片机计数,通过LED显示实时转速值．与传统的测速仪相比,可设定转速监测范围、存储设定参数,当电机超速时,可发出报警信号．试验证明,该系统测速精度高,电机状态监测可靠．     

Structuring academic conflicts between majority and minority students: Hindrance or help to integration

The effects of two types of structured academic conflict, controversy and debate, were compared with individual study in a study on desegregation. Seventy-two sixth grade students were assigned to conditions on a stratified random basis controlling for sex, reading ability, and ethnic membership. In all three conditions students studied a controversial issue with materials representing both pro and con views. In the controversy condition each learning group was divided into two pairs representing the pro and con sides. In the debate condition each member of a learning group was assigned a pro or con position to represent in a debate with the other three members. In the individualistic condition subjects were told to learn the material without interacting with other students and each student was given all the pro and con materials. The results indicate that controversy promotes the most cross-ethnic verbal rehearsal and exchange of the assigned material, the most concern that all students master the assigned material, the most active search for more information about the topic being studied, the most reevaluation of one's position and incorporation of opponents' arguments, the most liking for the subject matter and the instructional experience, the highest self-esteem, and the most accepting and supportive relationships among minority and majority students. The debate condition generated higher levels of these dependent variables than did individualistic study.     

The A.M.I.G.O. project: A multicultural intergroup opportunity

This paper describes an empirical investigation of changes incurred as a result of participation in a semester-long intercultural experience. “The A.M.I.G.O. Project” is conducted in small group communication classes and requires students to meet and interact weekly with foreigners living in their community. The project is designed to allow college students to obtain some of the benefits of a foreign experience without going abroad. The program is also intended to provide a meaningful and worthwhile experience to individuals temporarily living in the U.S. A single-factor repeated measures analysis of variance was used to examine differences between participants and non-participants at the beginning and end of the semester. Five dependent variables-acceptance of differences, openness to new ideas, importance of foreign exchange, responsibility toward foreigners living in the community, and attitudes toward peace-were evaluated. The results of the questionnaire strongly indicate a significant change in the attitudes of the participants. Overall, students became more accepting of diversity and differences, felt greater responsibility to and increased importance of foreign visitors to the United States, and developed a sense of importance and desire for travel abroad. Furthermore, the members of the English as a Second Language class [the Amigos] demonstrated significantly greater improvement on their English proficiency exams than non-participants. Implications of the results and a discussion of the limitations of the study conclude with suggestions for future research.     

利用集成开关型霍耳传感器测定惯性质量

把集成开关型霍耳传感器应用于惯性称实验中,测定物体的惯性质量,操作简便,测定精度高,同时能提高实验的现代化水平。     

用Visual-Basic建立的霍尔效应实验仪监测模块

变温霍尔效应测试系统是大学物理、材料、电子学科的重要实验仪器和研究设备。而Visual—Basic语言提供了串行通信控件。用Visual—Basic串行通信和分布式监控系统结合，可以建立HT648型变温霍尔效应实验仪的计算机监控系统。文章给出了用Visual—Basic建立的监测模块代码，需要监测数据时，可以调用这些模块中的程序来进行计算。     

人造骨杨氏弹性模量的测量与材料物理稳定性的研究

人造骨是骨科治疗中的新材料,将该材料引入到弯曲法测杨氏模量中,可作为医用物理设计性实验。对人造骨材料杨氏弹性模量测量结果发现其值与生物骨参数较为一致,生物相容性好。笔者还研究了它与湿度、温度及生理盐水浸泡的关系,数据表明该材料的物理稳定性极好。     

磁阻效应实验的设计

锑化铟既作霍尔元件测量了磁感应强度，又作磁敏电阻研究了其阻值随磁场的变化规律。不仅揭示了霍尔效应和磁阻效应在半导体内同时存在的事实，使产生2种物理现象的微观本质表现得更为突出，而且还消除了由于使用其他方法测量磁感应强度时，被测点与锑化铟所处位置不同而造成的系统误差。     

霍尔集成传感器的特性及其应用

详细地介绍了霍尔集成传感器内部结构、外形、输出特性、电气以及极限参数,并举例说明它的几方面应用.