Usage of public restroom lounges as support systems by elderly females

The common stereotype of elderly men whiling their time away on park benches illustrates the important concept of public social spaces, that is, places which act as support systems serving to anchor a person's identity and providing physical and/or emotional support. This paper examines the usage of public places by a different segment of the population—elderly females in an urban setting. Eight ladies' restroom lounges in four large department stores and the elderly women spending time there were observed in a northern midwestern city. The findings suggest that for these elderly ladies, the restroom lounges were serving as public social spaces. The physical character of those lounges, their social context, and patterns of use by various females were examined.     

White Ethnic Diversity and Community Attachment in Small Iowa Towns

Objectives . This study examines the relationship between white ethnic diversity and community attachment in 99 small Iowa towns. Methods . Our data come from the U.S. Census Bureau and the Rural Development Initiative (RDI) at Iowa State University. The RDI data, which consist of interviews with approximately 110 people in each of the 99 towns, are used to develop a community attachment score for each town. These scores serve as the dependent variable in ordinary least squares regression models to assess the extent to which ethnic diversity is related to attachment. Results . The findings show that towns with high levels of white ethnic diversity tend to have low levels of community attachment. Moreover, residents of diverse towns tend to view their communities with more suspicion and tend to be less involved in community activities than citizens in more homogeneous towns. Conclusions . Looked at narrowly, these results indicate that white ethnic diversity may be detrimental to community building in small Iowa towns. More broadly, the findings provide support for the idea that white ethnic diversity is alive and well in America.     

Estimating the Reliability of Single-Item Life Satisfaction Measures: Results from Four National Panel Studies

Life satisfaction is often assessed using single-item measures. However, estimating the reliability of these measures can be difficult because internal consistency coefficients cannot be calculated. Existing approaches use longitudinal data to isolate occasion-specific variance from variance that is either completely stable or variance that changes systematically over time. In these approaches, reliable occasion-specific variance is typically treated as measurement error, which would negatively bias reliability estimates. In the current studies, panel data and multivariate latent state-trait models are used to isolate reliable occasion-specific variance from random error and to estimate reliability for scores from single-item life satisfaction measures. Across four nationally representative panel studies with a combined sample size of over 68,000, reliability estimates increased by an average of 16% when the multivariate model was used instead of the more standard univariate longitudinal model.     

Knowledge management systems: surveying the landscape

Knowledge management systems (KMS) are the tools and techniques that support knowledge-management practices in organizations. The study of these systems consists of a small but growing body of literature. In the last two years alone, at least four books, two special editions of journals and a number of academic and practitioner articles have been published related to this area. However, much of the work that has been published has been in the form of isolated survey studies, or anecdotal case studies into particular aspects of KMSs. This has made it difficult to build a cumulative body of knowledge into the development, use and management of these systems. The purpose of this paper is to 'survey the current landscape' of KMSs, and provide a framework for research into the development and use of these systems in organizations. The intent is to highlight areas where 'gaps' exist in what we know about KMSs and suggest ways to close those gaps.     

HIV/AIDS and return to work: a literature review one-decade post-introduction of combination therapy (HAART)

It has been a little over one decade since the introduction of the first protease inhibitor that ushered in new era of treatment for persons living with human immunodeficiency virus (HIV) and Acquired Immune-Deficiency Syndrome (AIDS). As of the end of 2003, an estimated 37.8 million people worldwide were infected with the HIV. It is estimated that there are 850,000-950,000 persons in the United States living with human immunodeficiency virus (HIV) and that the incident rate is new cases each year. Since AIDS affects so many people of working age in the US, issues of employment, work rehabilitation and AIDS in the workplace have all become major concerns. The paper presents a review of the literature published during a ten year period that is relevant to understanding the various needs and barriers related to work as well as services designed to address them.     

The Benefits of Probabilistic Exposure Assessment: Three Case Studies Involving Contaminated Air,Water, and Soil1

Probabilistic risk assessments are enjoying increasing popularity as a tool to characterize the health hazards associated with exposure to chemicals in the environment. Because probabilistic analyses provide much more information to the risk manager than standard “point” risk estimates, this approach has generally been heralded as one which could significantly improve the conduct of health risk assessments. The primary obstacles to replacing point estimates with probabilistic techniques include a general lack of familiarity with the approach and a lack of regulatory policy and guidance. This paper discusses some of the advantages and disadvantages of the point estimate vs. probabilistic approach. Three case studies are presented which contrast and compare the results of each. The first addresses the risks associated with household exposure to volatile chemicals in tapwater. The second evaluates airborne dioxin emissions which can enter the food-chain. The third illustrates how to derive health-based cleanup levels for dioxin in soil. It is shown that, based on the results of Monte Carlo analyses of probability density functions (PDFs), the point estimate approach required by most regulatory agencies will nearly always overpredict the risk for the 95^th percentile person by a factor of up to 5. When the assessment requires consideration of 10 or more exposure variables, the point estimate approach will often predict risks representative of the 99.9^th percentile person rather than the 50^th or 95^th percentile person. This paper recommends a number of data distributions for various exposure variables that we believe are now sufficiently well understood to be used with confidence in most exposure assessments. A list of exposure variables that may require additional research before adequate data distributions can be developed are also discussed.     

对美国农业市场上合作性谈判协会的考察

一、引言合作性谈判协会是一些美国农业市场的一种制度特征。这种协会以为农民社员提供广泛的多样化服务为特征,其中主要是与各种市场中间商的价格合同谈判。从发展历程来看,