DTREE,The Electronic DSM-111-R

A study showing that student internet behavior differed significantly for students with high scores on a test of depression is thought to be the first to consider the relationship between internet use and depression that focuses on patterns of online behavior rather than content. Study findings have the potential for use in the human services as a way to assess and/or promote mental health. Although the data were collected anonymously with Institutional Review Board approval and participants' informed consent, objections have been raised suggesting this type of data collection represents “Big Brother” or the monitoring of individuals' behavior without their awareness as portrayed in George Orwell's famous novel, 1984. The importance of this type of research in furthering our understanding of the impact of Internet use on human behavior is emphasized. Additionally, the role of the university is stressed as a location for conducting ethical research which disseminates findings via publication to inform and spur policymakers to develop appropriate guidelines to prevent misuse of new knowledge and technology.     

On the Utopian Politics of Love the Sin Commentary on Love the Sin: Sexual Regulation and the Limits of Religious Tolerance by Janet R. Jakobsen and Ann Pelligrini

In considering the utopian vision that informs Love the Sin, the author situates that vision in relation to the utopian vision that informs psychoanalysis. These two visions are then contrasted.     

The contribution of research to community development

In this article I consider the relationship between differenttypes and methods of conducting research in the context of communitydevelopment. In particular I will consider the degree to whichdifferent approaches contribute to core objectives of communitydevelopment to empower communities and promote social justiceby engaging the most excluded. The contents will draw on a dialoguewithin my own agency, the Scottish Community Development Centre(SCDC).     

SELF-CONCEPT AS THE ORGANIZATION OF ROLES: Importance, Centrality, and Balance

Data from a set of middle-aged working men and women from the Raleigh-Durham-Chapel Hill metropolitan area are used to explore three different ways that individuals organize their self-concepts and infuse personal significance into their roles. Five sets of findings include the following: (1) both men and women identify many of their roles as personally significant, especially work and family roles; (2) men tend to attribute more importance and centrality to the role of worker than do women, while women tend to assign greater importance and centrality to most other roles; (3) different combinations of importance, centrality, and balance influence worker, spouse, and parent role satisfaction and identity meanings; (4) worker role centrality tends to have negative effects on spouse and parent role satisfaction and identity meanings; and (5) worker role importance and spouse centrality have a positive influence on self-esteem while worker centrality has a negative impact on self-esteem. The findings suggest that importance, centrality, and balance appear to be independent dimensions of personal significance that individuals ascribe to their roles.     

Retrieval Protracts Deferred Imitation by 6‐Month‐Olds

Past research using a deferred imitation task has shown that 6‐month‐olds remember a 3‐part action sequence for only 1 day. The concept of a time window suggests that there is a limited period within which additional information can be integrated with a prior memory. Its width tracks the forgetting function of the memory. This study asked if retrieving the memory of the modeled actions at the end of the time window protracts its retention, if the type of retrieval (active or passive) differentially influences retention, and if the retrieval delay influences its specificity. In Experiment 1, 6‐month‐olds either imitated the modeled actions (active retrieval group) or merely watched them modeled again (passive retrieval group) 1 day after the original demonstration. Both groups showed deferred imitation after 10 days. In Experiment 2, 6‐month‐olds who repeatedly retrieved the memory at or near the end of the time window deferred imitation for 2.5 months. In Experiment 3,6‐month‐olds spontaneously generalized imitation late in the time window after 1 prior retrieval, whether it was active or passive. These studies reveal that the retention benefit of multiple retrievals late in the time window is huge. Because most retrievals are undoubtedly latent, the contribution of repeated events to the growth of the knowledge base early in infancy has been greatly underestimated.     

企业培训市场的思考与对策

当今时代是知识经济时代,市场的竞争是人才的竞争。企业要发展就必须强化员工培训,这一点已得到了众人共识。企业的培训市场需求极大,但缺乏规范,培训实效低,培训方法单一,企业领导认识不足。对此,文章提出政府应完善制度,规范市场,增强企业提高培训的认识,建立培训基地,严格培训资格审查。建议培训机构应满足企业的个性化需求,并采用多种培训方法并重,提高培训实效。     

Determination of an Occupational Exposure Guideline for Manganese Using the Benchmark Method

An occupational risk assessment for manganese (Mn) was performed based on benchmark dose analysis of data from two epidemiological studies providing dose-response information regarding the potential neurological effects of exposure to airborne Mn below the current Occupational Safety and Health Administration (OSHA) Permissible Exposure Level (PEL) of 5 mg Mn/m3. Based on a review of the scientific evidence regarding the toxicity of Mn, it was determined that the most appropriate measure of exposure to airborne Mn for the subclinical effects measured in these studies is recent (rather than historical or cumulative) concentration of Mn in respirable (rather than total) particulate. For each of the studies analyzed, the individual exposure and response data from the original study had been made available by the investigators. From these two studies benchmark concentrations calculated for eight endpoints ranged from 0.09 to 0.27 mg Mn/m3. From our evaluation of these results, and considering the fact that the subtle, subclinical effects represented by the neurological endpoints tested in these studies do not represent material impairment, we believe an appropriate occupational exposure guideline for manganese would be in the range of 0.1 to 0.3 mg Mn/m3, based on the respirable particulate fraction only, and expressed as an 8-hour time-weighted average.     

Highs and lows: Some properties of the extremes of a diffusion and applications in finance

Observations on security prices, currency exchange rates, interest rates, and other financial time series usually include not only an open and close, but also a high and low price for the period. For Brown‐ian motion and certain diffusion processes, the information on high and low prices is of considerable value, particularly for estimating volatility, correlations between processes, and in the pricing of look‐back and barrier options. For pricing more general derivatives, this information is useful to the extent that change in volatility is an important ingredient in the price. The author gives a simple geometric device for generating the extremes of Brownian motion, and geometric Brownian motion; he then uses these extremes in the estimation of the volatility of the processes and to study survivorship bias.