Quantitative Risk Assessment of the New York State Operated West Valley Radioactive Waste Disposal Area

This article is based on a quantitative risk assessment (QRA) that was performed on a radioactive waste disposal area within the Western New York Nuclear Service Center in western New York State. The QRA results were instrumental in the decision by the New York State Energy Research and Development Authority to support a strategy of in‐place management of the disposal area for another decade. The QRA methodology adopted for this first of a kind application was a scenario‐based approach in the framework of the triplet definition of risk (scenarios, likelihoods, consequences). The measure of risk is the frequency of occurrence of different levels of radiation dose to humans at prescribed locations. The risk from each scenario is determined by (1) the frequency of disruptive events or natural processes that cause a release of radioactive materials from the disposal area; (2) the physical form, quantity, and radionuclide content of the material that is released during each scenario; (3) distribution, dilution, and deposition of the released materials throughout the environment surrounding the disposal area; and (4) public exposure to the distributed material and the accumulated radiation dose from that exposure. The risks of the individual scenarios are assembled into a representation of the risk from the disposal area. In addition to quantifying the total risk to the public, the analysis ranks the importance of each contributing scenario, which facilitates taking corrective actions and implementing effective risk management. Perhaps most importantly, quantification of the uncertainties is an intrinsic part of the risk results. This approach to safety analysis has demonstrated many advantages of applying QRA principles to assessing the risk of facilities involving hazardous materials.     

Demand‐Side Challenges to Poverty Monitoring and Assessment Systems: Illustrations from Tanzania

Over the past decade, considerable attention and resources have been directed at Poverty Monitoring and Assessment Systems (PMASs), a core problem being the limited demand for, and use of, the data they generate. This article discusses the sources of these demand‐side problems and explores the difficulties in trying to address them via PMAS‐related processes, arguing that both institutional factors and design features have contributed to the disappointing performance of these systems. Incentive structures within the public sector in particular have made for an extremely unfavourable environment, and institutional problems have been compounded by questionable design features resulting from faulty analysis, flawed assumptions and conflicting views as to the objectives of ‘poverty monitoring’. Tanzania's PMAS experience is used to illustrate the argument.     

An Evaluation of Caller Satisfaction with Solution-Focused Telephone Counselling

Abstract

‘Practice Forum’ is intended to provide a forum for social work practitioners to share their practice with others; to describe what they are doing and assess its effectiveness.

We extend an invitation to all social work practitioners to submit articles for ‘Practice Forum’ and we look forward to receiving your contribution.

The telephone is a potentially valuable intervention tool in family counselling. The Child, Adolescent & Family Health Service has been experimenting with a response which combines the traditional advantages of telephone counselling with aspects of Steve deShazer's solution-focused approach (deShazer 1985). In 1990 a study was conducted to evaluate caller satisfaction with this approach. Results indicate a high level of satisfaction with the counselling. At a time of increasing funding cuts and lengthening waiting lists, it is important that as many options as possible remain available to our clients. An expansion in effective telephone counselling services may well be one way of achieving this.     

On Non-parametric Estimation of the Survival Function with Competing Risks

The non-parametric maximum likelihood estimators (MLEs) are derived for survival functions associated with individual risks or system components in a reliability framework. Lifetimes are observed for systems that contain one or more of those components. Analogous to a competing risks model, the system is assumed to fail upon the first instance of any component failure; i.e. the system is configured in series. For any given risk or component type, the asymptotic distribution is shown to depend explicitly on the unknown survival function of the other risks, as well as the censoring distribution. Survival functions with increasing failure rate are investigated as a special case. The order restricted MLE is shown to be consistent under mild assumptions of the underlying component lifetime distributions.     

Leadership ambiguity in universities and K–12 schools and the limits of contemporary leadership theory

This paper explores the differences in context, assumptions, and behavior of leaders both in modern American universities and in elementary and high schools. The paper's main section examines the utility of five leadership theories (situational, charismatic, transformational, path–goal, and leader–member exchange [LMX]) in explaining leader behavior in each educational sector. We show that while each theory has some merit, none adequately incorporates the larger internal and external “system” pressures on leaders whose institutions are undergoing changes. The paper concludes with a recommendation for a reformulation of the leadership dilemmas in education that sets the five theories in a broader, systemic conceptual framework.     

Leaving Home for College: Expectations for Selective Reconstruction of Self

This paper describes how 23 primarily upper-middle-class high school seniors anticipated identity changes as they prepared to leave home for college. The transition from high school to college is a period of “liminality” during which students are structurally in between old and new statuses. We discuss how students anticipated change, planned to affirm certain of their identities, imagined creating new identities, and contemplated discovering unanticipated identities. Such interpretive effort must be understood in the context of the ambivalence they felt about leaving home and achieving independence. The data also provoke discussion of how social class membership might be implicated in people's ability to control identity change as they move through the life course.     

Changing the Palace Guard: Analysing the Impact of Women's Entry into Medicine

Women's rapid entry into medicine raises important questions about change in this historically male-dominated profession. In addition to shifting the gender balance, do increasing numbers of women signal a more fundamental change in the way in which medicine is organized and practised? A growing body of research suggests such change. Yet there is continuing controversy about the meaning of observed gender differences in practice, whether they reflect an essentially pragmatic response to women's dual workload of family and career, or whether they are the result of underlying differences in attitudes, values and orientations. This article uses data from a survey of a recent cohort of family physicians in Ontario, Canada, to document the extent of gender differences and similarities in medical practice, and their interrelationships to family situation, political attitudes and patient care attitudes. The results show that seemingly related differences in practice are accounted for in different ways: while some are associated with differences in family situation, others are tied to attitudes, while others are a function of gender alone. The results also reveal gender similarities which do not suggest that women are becoming more like men, but that men, and the profession as a whole are changing. We would emphasize the importance of interpreting gender differences and similarities within a broader conceptual understanding of change in the profession.