Reassessing the family-delinquency association: Do family type, family processes, and economic factors make a difference?

The present study drew on four competing theoretical perspectives to examine the relationship between family structure and juvenile delinquency. Using data from the Add Health Study, the authors examined nonserious and serious delinquent behavior across youth from different types of households and also considered how the association between family structure and delinquency might be conditioned by family processes and economic factors. Results from negative binomial regression analyses indicated that, in general, type of household was not a significant predictor of nonserious or serious delinquency. Rather, maternal attachment emerged as the most important determinant of delinquent behavior among youth from all family types. The results are discussed within the context of Hirschi's original interpretation of social control theory and future directions for research are suggested.     

《关于加强人民政协工作的意见》为充分发挥“三个作用”提供保障

中共中央颁发的《关于加强人民政协工作的意见》是人民政协工作的指南。充分发挥民主党派和无党派人士在人民政协的作用、人民政协组织的界别作用、政协委员在履行职能中的主体作用,是搞好人民政协工作的客观要求,应该抓紧抓好,并为之提供实施保障。     

大学生社会实践运行机制的研究与探索

社会实践是大学生思想政治教育的重要环节，对大学生健康成长成才具有不可替代的重要作用。建立和完善社会实践活动的运行机制，使社会实践活动成为中国特色的社会主义高等教育的重要组成部分，是摆在高校教育工作者面前的一项重要课题。目前高校社会实践存在着内容单一、流于形式等薄弱环节，难以调动大学生参加社会实践的积极性。高等教育应主动适应经济建设的运行机制，建立社会和学校双向受益及教学、科研和生产相结合的运行机制，为大学生社会实践可持续发展提供保障。     

Wilton Marion Krogman, Ph.D. (1903-1987): the end of an era

Dr. Wilton Marion Krogman was one of the major founders of physical and forensic anthropology in the United States. His extraordinary career spanned nearly six decades, and he was universally admired and respected for his scholarship, teaching, research, wit, and humanity. While studies based on human skeletal remains have long been used to assist the medicolegal system, the late Dr. Krogman can be credited with uniting these areas into the discipline of forensic anthropology. His "Guide to the Identification of Human Skeletal Material" (1939) in the F.B.I. Law Enforcement Bulletin became the foundation of this discipline; his monumental book The Human Skeleton in Forensic Medicine (updated with the author in 1986) solidified its establishment. The purpose of this paper is to pay tribute to this great man and outline his influence on the development and advancement of forensic anthropology.     

An in vitro study of the accuracy and precision of Breathalyzer models 900, 900A, and 1000

Ninety Breathalyzer instruments (Model 1000) and twenty instruments (Models 900, 900A) were studied using a protocol described by the Department of Transportation's "Standard for Devices to Measure Breath Alcohol." Although the mean of each of three concentrations tested (0.05, 0.10, and 0.15 g/210 L) compared favorably in both series, the standard deviation was consistently higher for the Model 1000 instruments. The Model 1000 instruments also produced a significant number of test results which exceeded the normally expected scientific deviation.     

Heroin abuse and a gas chromatographic method for determining illicit heroin samples in Singapore.

The abuse of heroin (diacetylmorphine) in Singapore escalated sharply in 1975 and 1976, as indicated by the 35-fold increase in the number of heroin seizures and the 20-fold increase in the urine samples containing morphine since 1974. A rapid and simple GC method has been described to estimate diacetylmorphine (and caffeine). Monoacetylmorphine and acetylcodeine may be ascertained by an additional step involving acetylation. All gas chromatograms of a large number of samples analyzed consistently had the same pattern, indicating that they possibly had a common origin. This GC "fingerprint," together with the quantitative data, appears to be characteristic of the illicit Asian or Chinese type of heroin found in Singapore. The proportions of the four major ingredients in some twelve typical samples have been tabulated. Statistical data confirming the accuracy and reproducibility of the analytical method have also been presented.