Generalized model for IGC growth in aluminum alloys

A generalized brick wall model is developed to describe intergranular corrosion in Equi-axed AA7178-T6 and Wingskin AA7178-T6 aluminum alloys. The intergranular corrosion rate is highly related to grain size and shape. High strength aluminum alloys are often elongated and anisotropic, with the fastest nominal IGC growth rate in the longitudinal direction (L) or long transverse direction (T) and the slowest in the short transverse direction (S). We propose a three-way intersection model and use it to simulate the corrosion kinetics for each direction. With a proper combination of model parameters, the generalized IGC model provides a good fit to experimental data developed by the foil penetration technique.     

Books vs. articles: Two ways of publishing sociology

Sociologists tend to publish either in the form of articles in scholarly journals or in the form of books. This paper attempts to show that not only do specific university departments have scholarly cultures emphasizing one or the other, but that structural and demographic factors — such as location, public or private status, and size — are correlated with each. Book departments tend to be found at exclusive private universities in or near big cities on both coasts, while article-producing departments tend to be in land grant universities in the South and Midwest. Recognizing that such publication decisions are not purely scientific in nature but are also partially socially constructed ought to allow us to have more diversity in how departments structure their scholarly cultures.     

Recent Research on the Psychological Effects of Unemployment

Economic turbulence in the early 1980s stimulated not only popular and governmental concern about the effects of unemployment, but also extensive research on the topic. This journal issue presents 10 representative reports of such recent research from the United States and Europe. Of the two principal methodologies used in this field, aggregate time-series analysis and individual-level surveys, this issue is limited to the individual-level literature. Two papers provide a social psychological and human developmental orientation to the topic. Then, six papers address the psychological costs of unemployment, four based on population surveys and two dealing with plant closings. Finally, two papers describe policy responses being considered or implemented in North America and Europe.     

The Development of a Student-Run Ambulance

Abstract

Abortion decisions have a potentially meaningful effect on the lives of men. Previous research suggests that both men and women generally believe that men have the right to be involved in such decisions. However, very little research attention has been devoted to identifying individual difference correlates of discrepant levels of endorsement for male involvement in abortion decisions. The extent to which abortion attitudes (on a pro-choice to pro-life continuum), conceptualization of abortion as strictly a female issue, and interest in the issue operate as effective predictors of the appropriate level of male involvement in abortion decisions was examined in a sample of 1,387 college students. Results of a multiple regression analysis revealed that 44% of the variance in male involvement scores was explained by the predictor variables.     

Paul U. Kellogg and the Survey: Voices for Social Welfare and Social Justice,by Clarke A. Chambers. Minneapolis,University of Minnesota Press, 1971. 296 Pages, $10.00. Hardbound

Abstract

Previous research showing that roughly half of social work students report a history of familial alcohol abuse—and proposing that such abuse might affect these students' current mental health and professional performance—relied on self-reports without standardized screening measures. This 1991 study, based on a convenience sample of 136 MSW students at the University of Texas at Austin, determined students' status as Adult Children of Alcoholics (ACAs) by self-reports and scores on the Children of Alcoholics' Screening Test, and evaluated related mental health functioning with four standardized measures. The results suggest that well under half of social work students are ACAs, and that not all (nor only) ACAs were vulnerable to mental health problems.     

Business drivers not sector membership determine the most effective production planning and control; a novel approach to a perennial problem

This paper outlines research aimed at developing novel planning and scheduling reference models for industrial sectors where the MRPII paradigm is not appropriate. It outlines the process mapping approach adopted, the data capture method developed for the case study companies, the use of ARIS (Scheer's) enterprise modelling tool, and the first stages in the production of sector reference models.     

A Hausman test for Brownian motion

New tests are proposed for the specification of the intraday price process of a risky asset, based on open, high, low, and close prices. Under the null of a Brownian process we derive two stochastically independent, unbiased volatility estimators. For a Hausman specification test we prove its equivalence with an F-test, consider its robustness against variation in drift and volatility, and analyze the power against an Ornstein–Uhlenbeck process, as well as a random walk with alternative distributions.     

Modeling Values for Anti-Terrorism Analysis

Decisions are made to achieve objectives. A qualitative list of the objectives for a decision is the foundation for a value model that unambiguously represents objectives in a quantitative manner. The objectives guide thinking and the value model provides a basis for analyzing alternatives to best meet the desired objectives. This article illustrates the usefulness of clearly identifying objectives and developing value models to support anti-terrorism analysis. It outlines procedures to develop value models for the Department of Homeland Security and for terrorist organizations. The later is useful to both design anti-terrorism alternatives and suggest possible terrorist priorities and actions. An example that develops a terrorist value model for the theft and misuse of plutonium is presented. Several uses of value models for anti-terrorist activities are discussed and suggestions for developing such value models are outlined.