The rôle of density as a factor in metropolitan growth in the United States of America

U.S. Census data are used to show that, as the density of a metropolis increases there is a concomitant increase in the movement of population to the suburbs. This relationship is closest for small metropolitan areas. As size of the area increases, the closeness of the relationship decreases until it reverses—the largest areas actually show a slight decline in metropolitanization when density goes up. It is concluded that metropolitan expansion has definite bounds set by technological factors which place a limit on the distance that the commuter can reasonably travel daily.

For cities with populations of less than 500,000 there is a correlation of near zero between size of population and density. Such cities therefore maintain a constant density. But for cities with larger populations, size of population and density rise together.

It is concluded that small cities undergo metropolitan expansion with ease. Distances are within technological limits and any increase in population is reflected in an increase in area. But when a certain area is reached, further expansion is curtailed with a resultant increase in internal density. The net result is a stopping or slowing down of the metropolitan process.     

Federalism Policy,Economic Policy and Implementation of the Bailey Report

The Bailey Task Force (BTF) report is reviewed from the perspective of a would-be implementer. The BTF report is partially implementable if its writers were able to resolve three critical issues. First, they might emphasize how its four Program (Block) Grant proposals would influence the economy through opening up employment opportunities. Next, they should spell out how pilot developments of certain Program Grants could proceed with model legislation, and should indicate the contents of that legislation. Finally, they should be more specific about consultative mechanisms involving non-government agencies and local government.     

Oral Language Competence,Social Skills and High‐risk Boys: What are Juvenile Offenders Trying to Tell us?

A cross‐sectional study examining the oral language abilities and social skills of male juvenile offenders is described. Fifty juvenile offenders and 50 non‐offending controls completed measures of language processing and production, and measures of social skill and IQ. Information about type of offending, substance use histories and learning/literacy problems was also gathered. Young offenders performed significantly worse on all language and social skill measures, but these differences could not be accounted for on the basis of IQ. Just over half of the young offenders were identified as language impaired. This subgroup was compared with non‐language impaired offending peers on a range of variables. The findings have particular implications in the areas of early intervention for high‐risk boys and investigative interviewing of juvenile offenders. © 2007 The Author(s). Journal compilation © 2007 National Children's Bureau.     

Social Work Education and the Changing Nature of Public Agency Practice

The CSWE accreditation standard requiring deans and directors to demonstrate commitment to the ethical values of the profession again raises questions about what commitment to ethical values means and about how determinations of adherence will be made. In this paper, two contrasting educational doctrines found in universities are reviewed. Aspects of each are found in social work statements of value. Special attention is given to their conflicting conceptions of students and the ideal learning environment. Following this, a sample of social work values and procedures for determining adherence to them are reviewed. Suggestions for further study are given.     

Exploring the Uncertainties in Cancer Risk Assessment Using the Integrated Probabilistic Risk Assessment (IPRA) Approach

Current methods for cancer risk assessment result in single values, without any quantitative information on the uncertainties in these values. Therefore, single risk values could easily be overinterpreted. In this study, we discuss a full probabilistic cancer risk assessment approach in which all the generally recognized uncertainties in both exposure and hazard assessment are quantitatively characterized and probabilistically evaluated, resulting in a confidence interval for the final risk estimate. The methodology is applied to three example chemicals (aflatoxin, N‐nitrosodimethylamine, and methyleugenol). These examples illustrate that the uncertainty in a cancer risk estimate may be huge, making single value estimates of cancer risk meaningless. Further, a risk based on linear extrapolation tends to be lower than the upper 95% confidence limit of a probabilistic risk estimate, and in that sense it is not conservative. Our conceptual analysis showed that there are two possible basic approaches for cancer risk assessment, depending on the interpretation of the dose‐incidence data measured in animals. However, it remains unclear which of the two interpretations is the more adequate one, adding an additional uncertainty to the already huge confidence intervals for cancer risk estimates.     

Instructional Design: Bridge to Competence

Competency-based education emphasizes precision and rigor in instructional development. Social work educators surveyed reported differential success in implementing key instructional development elements. They reported success in specifying instructional objectives and developing related assessment procedures. They faced frequent obstacles in the systematic design of instruction; that is, in building bridges to competence for the learner. A theoretical framework is proposed to guide instructional design strategies. Three interrelated constructs are developed: learning task characteristics, learning environment characteristics, and learner characteristics. Approaches for operationalizing each construct are identified. Design strategies emerge from matching learner and learning environment characteristics to optimize performance on differentiated learning tasks.     

Pregnancy, work and women's well-being: A review

Pregnancy is potentially a stressful period for working women for ergonomic, psychological and organizational reasons, yet the well-being of women is seldom the focus of research on working during pregnancy. This paper reviews the literature on women's experience of being pregnant at work. It concludes that, while working conditions are usually not well suited to pregnant women, the majority of women encounter only minor difficulties and regard working in a positive way. However, for a minority of women working during pregnancy adversely affects their well-being. These are likely to be women working during pregnancy adversely affects their well-being. These are likely to be women who are most at risk from work-related stress at other times. The literature suggests that working during pregnancy has still to be accepted and accommodated by employers and colleagues.     

“I Try Not to Depend on Anyone but Me”: Welfare‐Reliant Women's Perspectives on Self‐Sufficiency,Work, and Marriage*

Welfare reformers sought to reduce “dependency,” or reliance on state‐supported cash benefits and deployed a discourse of “self‐sufficiency” to promote the legitimacy of efforts to remove welfare recipients from publicly funded cash assistance through either wage labor or marriage. We use longitudinal, qualitative interview data collected from 38 initially welfare‐reliant women to examine what self‐sufficiency means to them and their perspectives on how work and marriage affect their ability to be self‐sufficient. Grounded theory analysis revealed that for these women, self‐sufficiency means formal independence from both the state (i.e., Temporary Assistance to Needy Families [TANF]) and men (i.e., marriage). Although they value marriage as an institution and would ideally marry, they do not consider marriage to be a likely route to self‐sufficiency given the pool of men available to them. Rather, they embrace their own market‐based wage labor as the means by which they can attain some measure of independence. Taking our lead from the women in this study, we challenge the emphasis on marriage in current welfare policy. We argue that employment training that results in better jobs for women and men and work supports that make low‐wage work pay are clearly the appropriate direction for policy aimed at the welfare‐reliant and working poor.