图像处理技术在乘用车侧面碰撞试验中的应用

多媒体计算机序列图像运动分析系统与摄影测量学理论相结合,成为较完善的非接触动态测量系统.在乘用车侧面碰撞试验中采用图像采集和数字图像处理技术,结合直接线性变换(direct liner transformation,DLT)算法,分析碰撞试验中标示点的变形量,提高乘用车侧面碰撞强度,为汽车被动安全性研究提供依据.     

Parents' roles and question‐asking during pretend and real activities

All activities—real and pretend—provide children opportunities to learn new facts and skills, and parents are often facilitators. Yet little is known about whether and how parents' roles and interactions differ during pretend versus real activities. Here, we examine whether parents self‐report adopting different roles during pretend and real activities and whether we observe changes in their behavior, in particular in their question‐asking; either could impact the potential learning opportunities available to children. Thirty‐two parents engaged their 4‐year ‐olds in one pretend and one real activity (cleaning and snacking, counterbalanced). They self‐reported their roles, and speech was transcribed and coded. Parents regarded their role as a partner in fun during pretend and as a teacher or monitor during real activities. Across pretend and real contexts, they mostly asked information‐seeking questions, followed by rhetorical and pedagogical questions. They asked significantly more questions during pretend than real activities, particularly rhetorical questions. During real activities, parents' roles were not related to the number or types of questions they asked. However, during pretend, their roles were related to the number of rhetorical questions they asked: Monitors asked significantly fewer than teachers. Possible complementary benefits of each activity based on patterns of roles and questions are discussed.     

Chebyshev Inequality with Estimated Mean and Variance

Chebyshev's inequality is investigated when the population mean and variance are estimated from a sample. The necessary modification to the inequality is simple and is actually valid when (a) the population moments do not exist and (b) the sample is exchangeably distributed. The latter case would include, for example, a sample taken without replacement from a finite population and the independent and identically distributed case.     

Personal Brand in Online Advertisements: Comparing White and Brazilian Male Sex Workers

Abstract

We examine marketing strategies used by Brazilian and white American male sex workers in their online advertisements and the degree to which ethnicity is emphasized as an aspect of personal branding. The results show that both groups emphasize similar aspects that are important in the sex trade, particularly their physical attributes, although emphasis and details vary. The results also suggest that male sex workers are cognizant of ethnic and racial preferences or fetishes and use them to enhance marketability in their online advertisements.     

Investigating Diversity in Social Work Doctoral Education in the United States

ABSTRACT

Despite its emphasis on social justice, social work in the United States has not always attended to issues of diversity in doctoral education. This article examines the state of the discipline’s research on traditionally underrepresented students in U.S. doctoral social work programs. An analysis of relevant peer-reviewed articles from social work journals revealed that this research has focused on demographic trends, degree motivation, student barriers, existing supports, and career navigation. Diversity in U.S. doctoral social work education is vastly understudied with the majority of scholarship focusing on ethnoracial difference. The limitations of this study are discussed, and future research directions are proposed including the need to examine various kinds of social differences and a wider range of support initiatives.     

Factors related to casino dealer burnout and turnover intention in Macau: Implications for casino management

This study examined 172 casino dealers in Macau in order to understand dealers' feelings and attitudes about working in a casino. Several personality variables (emotional suppression, neuroticism, and need for achievement), organizational variables, i.e., organizational socialization (training, understanding, coworker support, future prospects), and distributive justice, were assessed in relation to casino dealers' job burnout, and work and pay satisfaction. All variables were tested as correlates of work and pay satisfaction, burnout, and turnover intention. Regressions found emotional suppression (a behaviour required of casino dealers) to be a strong negative predictor of work satisfaction; while training, distributive justice, and need for achievement were positive predictors. Emotional suppression and neuroticism were positive predictors of burnout; while future prospects and work satisfaction were negative predictors. Also, the future prospects and understanding dimensions of organizational socialization negatively predicted turnover intention. Results are interpreted in relation to casino administration and the management of casino dealers.     

学校办公自动化系统设计

本文主要介绍了学校校园网的系统设计模型 ,并说明了客户端和服务器的实现方法和功能     

High Stakes: Time Poverty,Testing, and the Children of the Working Poor

Sociological interest in the implementation of policy generally focuses on the ways a single stream of policy creates a set of measurable consequences either for parents or children. This article takes an ethnographic approach to the study of conflicting policy mandates that collide in the lives of families moving from welfare to work at the same time that schools are implementing high stakes tests and the end of social promotion. We show that these two policies make contradictory demands on parents, to the potential detriment of children. Ethnographic research reveals the ways in which multiple and incompatible forms of policy impact poor families, putting them in the unhappy position of choosing between economic stability or mobility and children's educational performance.