Network researchers have been concerned with evaluating the accuracy of individuals' descriptions of their personal networks for many years. This paper examines the…
Network researchers have been concerned with evaluating the accuracy of individuals' descriptions of their personal networks for many years. This paper examines the problem of “forgetfulness” and the extent to which it influences the measurement of ego-centric or personal social networks over time. The data come from the Indianapolis Network Mental Health Study (INMHS), a longitudinal study of the social networks of a cohort of individuals newly diagnosed with mental health problems. We focus on 114 people who completed two or more waves of the INMHS and explore the frequency that names mentioned in prior waves were forgotten. The results indicate that the membership of the respondents' networks changed significantly over the three waves; however, less than 5% of the observed change was due to respondents forgetting ties mentioned in prior waves. The vast majority of changes observed in their networks reflected “true” change in the composition of the respondents' social networks. Overall, the results suggest that people with mental health problems can provide descriptions of the changes in their social networks that are reliable and relatively free of recall bias. The implications of these findings for measuring personal networks over time are discussed.
This paper presents a theoretical framework and pilot study that examines the social context of the mental health treatment system and its impact on the spread of HIV…
This paper presents a theoretical framework and pilot study that examines the social context of the mental health treatment system and its impact on the spread of HIV among people with serious mental disorders. Recent epidemiological evidence indicates that mental illness clients may be at especially high risk of contracting HIV/AIDS. Mental health professionals' efforts to respond to the emerging epidemic, however, have been limited and focused primarily on individual-level interventions to change risk behavior. Virtually no consideration has been given to how treatment environments influence client risk behavior and/or the effectiveness of HIV prevention efforts. The perspective outlined in this paper builds on existing clinical research and proposes a general sociological framework for researching mental illness clients' HIV risk that emphasizes the clinical sexual culture of treatment programs. In an effort to develop preliminary measures and test key assumptions of the proposed framework, a small pilot study was conducted at a large state psychiatric hospital in the Midwest. The results suggest that clinical sexual culture does have a significant impact on the way both the patients and staff think about the management of patient sexual expression and HIV/AIDS at the hospital. More generally, the findings provide preliminary support for the theoretical framework presented.
The papers in this collection address a set of important issues facing our discipline. These issues cross national boundaries, and indeed are important far beyond the…
The papers in this collection address a set of important issues facing our discipline. These issues cross national boundaries, and indeed are important far beyond the sociological sphere. My brief comments here will use these papers as a springboard for noting several important curricular challenges and trends for sociology, in particular, and academia, more generally, as we enter the next century.
This paper attempts to reconcile an apparent contradiction between short‐run and long‐run movements in the price of gold. The theoretical model suggests a set of conditions under which the price of gold rises over time at the general rate of inflation and hence be an effective hedge against inflation. The model also demonstrates that short‐run changes in the gold lease rate, the real interest rate, convenience yield, default risk, the covariance of gold returns with other assets and the dollar/world exchange rate can disturb this equilibrium relationship and generate short‐run price volatility. Using monthly gold price data (1976–1999), and cointegration regression techniques, an empirical analysis confirms the central hypotheses of the theoretical model.
This paper aims to assess the strengths and weaknesses of four thermodynamic models used in aircraft icing simulations to orient the development or the choice of an…
This paper aims to assess the strengths and weaknesses of four thermodynamic models used in aircraft icing simulations to orient the development or the choice of an improved thermodynamic model.
Four models are compared to assess their capabilities: Messinger, iterative Messinger, extended Messinger and shallow water icing models. They have been implemented in the aero-icing framework, NSCODE-ICE, under development at Polytechnique Montreal since 2012. Comparison is performed over typical rime and glaze ice cases. Furthermore, a manufactured geometry with multiple recirculation zones is proposed as a benchmark test to assess the efficiency in runback water modeling and geometry evolution.
The comparison shows that one of the main differences is the runback water modeling. Runback modeling based on the location of the stagnation point fails to capture the water film behavior in the presence of recirculation zones on airfoils. However, runback modeling based on air shear stress is more suitable in this situation and can also handle water accumulation while the other models cannot. Also, accounting for the conduction through the ice layer is found to have a great impact on the final ice shape as it increases the overall freezing fraction.
This paper helps visualize the effect of different thermodynamic models implemented in the same aero-icing framework. Also, the use of a complex manufactured geometry highlights weaknesses not normally noticeable with classic ice accretion simulations. To help with the visualization, the ice shape is presented with the water layer, which is not shown on typical icing results.
Requests for tests and measuring instruments for use in class assignments and faculty and student research are both familiar and frustrating to most academic librarians…
Requests for tests and measuring instruments for use in class assignments and faculty and student research are both familiar and frustrating to most academic librarians. In typical scenarios, an education student wants to measure aggression in children or a nursing student needs a test for patient mobility. Even the faculty member who may know the name of a scale may not know its author or how to obtain a copy. All are looking for a measure applicable to a specific situation and each has come to the library in hopes of walking away with a copy of the measure that day. Those familiar with measurement literature know that accessing measures can be time consuming, circuitous, and sometimes impossible. The standard test reference books, such as the Mental Measurements Yearbook and Tests in Print (both of which are published by the Buros Institute, University of Nebraska, Lincoln, Nebraska), are of limited use. These books typically do not include actual instruments or noncommercial tests from the journal and report literature. While these standard reference books are essential to a test literature collection, sole use of them would mean bypassing large numbers of instruments developed and published only in articles, reports, papers, and dissertations. Sources are available to locate additional measurements, tests, and instruments, but they are widely dispersed in the print and electronic literature.