From Scare Tactics to Reasoned Decisions: A Decade of Drug Education Films

Over the past decade, the Audiovisual Assessment Group of the Addiction Research Foundation of Ontario has evaluated nearly 500 drug education films. A review of those evaluations reveals that good drug education films meet certain criteria and that, although there are many good films, there are many gaps that film producers could fill.     

Negative caregiver strategies and psychopathology in urban,African-American young adults

OBJECTIVE: There were three aims: (1). assess the prevalence of reported exposure to negative caregiver strategies in a community-based African-American population, (2). examine the sources of variation in caregiver parenting strategies, including demographic variables and child characteristics, (3). investigate whether mental disorders in young adulthood may differ based on reported degree of exposure to negative strategies. METHOD: The participants were 1197 African-Americans involved in a 1999-2001 young adult follow-up (age M=19.6, SD=.6) of an evaluation of school-based interventions in the Baltimore, MD metropolitan area. Measures included teacher-report of child aggression in first grade, parent-report of demographic variables in first and sixth grade, and young adult self-report of symptomatology, suicidal behaviors, and childhood caregiver discipline strategies. RESULTS: Fifty-four percent of the sample reported some use of physical discipline by caregivers. Lower family income and younger caregiver age, as well as teacher reports of child aggression, were related to reports of caregiver's high use of negative strategies. In addition, young adults who reported a high rate of negative caregiver strategies had a significantly increased risk for psychopathology and were over twice as likely to have experienced a history of suicidal ideation than those reporting low exposure.CONCLUSIONS: The results demonstrate the importance of examining variation in this population, with the poorest and the youngest using negative parenting strategies more frequently. In addition, the present study replicated previous findings of the link between negative caregiver discipline strategies and psychopathology. This association appears robust across diverse populations. The implications for preventive interventions are discussed.     

潮汕陶瓷发展沿革研究

本文以考古发现的材料和历史文献及前人的研究成果为依据,勾勒出潮汕地区陶瓷演变发展的脉络,揭示了潮汕陶瓷发展沿革在中国陶瓷史中拥有不可低估的学术价值.     

The preparation and properties of some synthetic photohalide emulsions

(1) A method of preparing photohalide emulsions somewhat different from that of Lüppo-Cramer has been worked out, using either colloidal silver or colloidal silver sulphide as the sensitizer.(2) Treatment of the plates containing this emulsion with chromic acid to remove excess colloidal silver also lowers sensitivity considerably. This sensitivity can be restored by an after-treatment of the plates with a very dilute ammonia solution.(3) The photohalide emulsion prepared as described showed, with one exception, a broader spectral sensitivity than those prepared without colloidal silver or silver sulphide. This agrees with the previous work of others on photohalide emulsions.(4) The spectral sensitivity of such emulsions differs from those sensitized with allyl-thiourea sensitizer in being more sensitive in the red and less sensitive in the green region of the spectrum.(5) The present work supports the strain-ionic deformation hypothesis of sensitivity proposed by Sheppard, Trivelli and Loveland. It does not, however, exclude the hypothesis of Hickman as to the role played by the silver sulphide sensitizing speck.