利用JAVA多线程并发机制解决生产者—消费者问题

本文分析并描述了JAVA多线程并发过程中的同步机制及消息通信机制的基本原理,探讨如何运用多线程同步机制和消息互通机制切实解决生产者和消费者之间的问题。     

双轨道型多柔传动装置的研制

阐述了新一代双轨道式多柔传动装置的设计思想、工作原理及优点等。     

Engagement and disaffection in the classroom: Part of a larger motivational dynamic?

A study of 805 4th through 7th graders used a model of motivational development to guide the investigation of the internal dynamics of 4 indicators of behavioral and emotional engagement and disaffection and the facilitative effects of teacher support and 3 student self-perceptions (competence, autonomy, and relatedness) on changes in these indicators over the school year. In terms of internal dynamics, emotional components of engagement contributed significantly to changes in their behavioral counterparts; feedback from behavior to changes in emotion were not as consistent. Teacher support and students' self-perceptions (especially autonomy) contributed to changes in behavioral components: Each predicted increases in engagement and decreases in disaffection. Tests of process models revealed that the effects of teacher context were mediated by children's self-perceptions. Taken together, these findings suggest a clear distinction between indicators and facilitators of engagement and begin to articulate the dynamics between emotion and behavior that take place inside engagement and the motivational dynamics that take place outside of engagement, involving the social context, self-systems, and engagement itself. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Predicting Educational and Vocational Attitudes Among Rural High School Students.

Given the paucity of literature addressing the experiences of rural youth, this study investigated the ability of assessed levels of social support, perceived parental involvement, academic self-efficacy, and perceived educational barriers to predict school engagement and work role attitudes among rural high school students. The authors specifically intended to test the generalizability of M. E. Kenny, D. L. Blustein, A. Chaves, J. M. Grossman, and L. A. Gallagher's '(2003) findings with a rural population and within a social cognitive career theory (R. W. Lent, S. D. Brown, & G. Hackett, 2002) framework. Results supported the hypothesized importance of contextual factors (social support and parent involvement) and self-efficacy in predicting the work and school attitudes of rural students. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

消费需求升级背景下的产业融合研究——以电子信息产业为例

本文从需求方的角度,重新思考了电子信息产业的融合动因及表现形式,说明以前对产业融合动因的认识如经济的全球化、政府放松管制及技术进步,归根结底都源自消费需求的升级。产业融合所导致的产业发展变化同时又对产业边界的认识及垄断与竞争的界定提出了新的问题。特别对于转型时期的中国,虽然不少企业在面临产业融合的趋势时作出了积极的应对,但政府管制的思路及对电子信息产业的调控政策还应作出相应的转变和调整。     

Early predictors of job burnout and engagement.

A longitudinal study predicted changes in burnout or engagement a year later by identifying 2 types of early indicators at the initial assessment. Organizational employees (N = 466) completed measures of burnout and 6 areas of worklife at 2 times with a 1-year interval. Those people who showed an inconsistent pattern at Time 1 were more likely to change over the year than were those who did not. Among this group, those who also displayed a workplace incongruity in the area of fairness moved to burnout at Time 2, while those without this incongruity moved toward engagement. The implications of these 2 predictive indicators are discussed in terms of the enhanced ability to customize interventions for targeted groups within the workplace. (PsycINFO Database Record (c) 2010 APA, all rights reserved)