Estimating Contaminant Dose for Intermittent Dermal Contact: Model Development, Testing, and Application

Assessments of aggregate exposure to pesticides and other surface contamination in residential environments are often driven by assumptions about dermal contacts. Accurately predicting cumulative doses from realistic skin contact scenarios requires characterization of exposure scenarios, skin surface loading and unloading rates, and contaminant movement through the epidermis. In this article we (1) develop and test a finite-difference model of contaminant transport through the epidermis; (2) develop archetypal exposure scenarios based on behavioral data to estimate characteristic loading and unloading rates; and (3) quantify 24-hour accumulation below the epidermis by applying a Monte Carlo simulation of these archetypal exposure scenarios. The numerical model, called Transient Transport through the epiDERMis (TTDERM), allows us to account for variable exposure times and time between exposures, temporal and spatial variations in skin and compound properties, and uncertainty in model parameters. Using TTDERM we investigate the use of a macro-activity parameter (cumulative contact time) for predicting daily (24-hour) integrated uptake of pesticides during complex exposure scenarios. For characteristic child behaviors and hand loading and unloading rates, we find that a power law represents the relationship between cumulative contact time and cumulative mass transport through the skin. With almost no loss of reliability, this simple relationship can be used in place of the more complex micro-activity simulations that require activity data on one- to five-minute intervals. The methods developed in this study can be used to guide dermal exposure model refinements and exposure measurement study design.     

Prayer in Public Schools: When Church and State Collide

Prayer and Bible reading in public schools have led to threemajor Supreme Court decisions and the introduction of numerousconstitutional amendments in the U.S. Congress which would permitvoluntary prayer in public schools or limit federal court jurisdiction.Public opinion polls beginning in 1964 have suggested widespreadsupport among the American public for prayer in public schools.Little is known, however, concerning the characteristics ofthose supporting and opposing prayer in public schools. Thisarticle addresses the school prayer issue through an analysisof three national surveys which were conducted in 1974. 1980.and 1982. Those favoring school prayer were found to be older,less educated, and socially, politically, and religiously conservative.Multivariate analysis revealed that the key predictor variableswere religious orthodoxy and religious salience, a finding whichmay stem from the observation that school prayer is both a politicaland a religious issue. Issue salience, congressional votingdecisions, and demographic characteristics of school prayeradvocates are considered as possible explanations for the failureof Congress to act in accord with public opinion.     

THE DIFFUSION OF MEDICAL TECHNOLOGY: SOCIAL NETWORK ANALYSIS AND POLICY RESEARCH

The purpose of this article is to demonstrate how social network analysis can be used to provide information for policy decisions pertaining to physicians' adoption and utilization of new medical technology. Interviews and hospital records were used to obtain data on refenals, consultations, discussions, and on-call coverage; utilization of a computer-based hospital information system; and personal and practice characteristics from 24 physicians who belong to a private group practice. The results of a block-model analysis suggest that the physician's relative position in the network is an important determinant of his/her participation in the diffusion process. A number of policy implications related to the introduction of new medical technology into practice settings are discussed.     

Contradictions of state socialism: the case of Poland*

This article originates from an invitation to give a paper at the Polish Academy of Sciences in Warsaw m the Autumn of 1980. As then drafted, the paper consisted mainly of a discussion of the writings of selected Polish and British sociologists on the structure and workings of contemporary state-socialist societies, and it was my intention to revise it for submission to the Sociological Review as a sequel to, and commentary on, the article by Christopher G.A. Bryant published in the issue of February, 1980.¹ On return from Warsaw, I decided against doing so for two reasons: first, it seemed to me that the writings which I had taken as my starting-point were too remote from the actual course of events in Poland; second, I did not see how I could use the many informative conversations about those events which I had had with Polish sociologists and others in an academic journal article. On further reflection, however, I do not believe that either of these reasons should prevent my attempting to set out and justify my view of the implications for sociological theory of the Polish case, even though it is based in part on non-documentary sources and (more seriously) I lack the knowledge of the language which would give me direct access to the documentary ones. In what follows, accordingly, I first outline the framework within which the forms and distribution of power in state-socialist societies in general and Poland in particular can, in my view, best be analysed; I then set out in slightly more detail what I see as the reasons why events in Poland between 1956 and 1981 followed the course they did; and I conclude with a brief discussion of what I believe to be the principal weakness in the recent British sociological literature on state socialism insofar as it relates to the Polish case.     

Who Cares If Police Become Violent? Explaining Approval of Police Use of Force Using a National Sample

Understanding police violence is important in part because police violence, if generally tolerated, could transform a society based on law into one governed by political and personal whim. This research asks whether the conflict perspective can explain which groups are more likely to approve of police use of force, and whether several dimensions of power are at issue or just a few. Previous studies have found that race is the most important factor in determining approval of police use of force. Gender, age, class, and other variables have shown mixed results. Using a national sample (1998 General Social Survey), this paper contributes a more comprehensive examination of this issue to the small body of literature in this area. We look at approval of police use of force in five scenarios. Our findings show that minorities and women are more likely to disapprove of police use of force. Supporting a narrow application of conflict theory, other dimensions of power appear not to affect attitudes toward police hitting citizens. Context of violence matters too. When situations are not actively threatening for officers, by near consensus, violence is unacceptable. Disagreement comes from less clear-cut circumstances.     

Coping and adaptation by children with mild physical differences

This comparative study of 60 parents' and teachers' views of how elementary school children cope with their own mild physical differences and with current psychosocial development and academic tasks in mainstream classrooms identified statistically significant differences in use of defensive-adaptive imagery and psychosocial functioning between children experiencing academic success and failure.     

Return Migrations of African‐Americans to the South: Reclaiming a Land of Promise,Going Home,or Both?*

Abstract Using samples of census data from the University of Minnesota Population Center's “Integrated Public Use Microdata Series” (IPUMS), we describe trends in African‐American migration to the South across recent decades, and explore the applicability of the concept of “return migration” to various demographic patterns. Our findings suggest that the return movement contains multiple migration streams involving African‐Americans of higher socio‐economic status (compared with both origin and destination populations) moving to both urban and rural destinations. These patterns represent clear differences from the earlier 20^th century's “Great Migration” of African‐Americans from South to North. The recent return migration streams suggest that the South may be replacing the North as a “land of promise” for some upwardly mobile African‐Americans, and may also reflect what Carol Stack (1996) has termed a “call to home” as a motivating factor shaping recent African‐American migration to the rural South.     

Book reviews

Theory and Society -