Polyhedral combinatorics of the cardinality constrained quadratic knapsack problem and the quadratic selective travelling salesman problem

This paper considers the Cardinality Constrained Quadratic Knapsack Problem (QKP) and the Quadratic Selective Travelling Salesman Problem (QSTSP). The QKP is a generalization of the Knapsack Problem and the QSTSP is a generalization of the Travelling Salesman Problem. Thus, both problems are NP hard. The QSTSP and the QKP can be solved using branch-and-cut methods. Good bounds can be obtained if strong constraints are used. Hence it is important to identify strong or even facet-defining constraints. This paper studies the polyhedral combinatorics of the QSTSP and the QKP, i.e. amongst others we identify facet-defining constraints for the QSTSP and the QKP, and provide mathematical proofs that they do indeed define facets. Author now works at Motorola. (2005 onwards)     

Estimation of a population mean with two-way stratification using a systematic allocation scheme

A technique of systematically allocating a sample to the strata formed by double stratification is presented. The method can proportionally allocate the sample along each variable of stratification. If there are R strata and C strata for the first and second variable of stratification respectively, the technique requires that the total sample size be at least as large as max(R, C). An unbiased estimator of the population mean is given and its variance is obtained. The technique is compared with a random allocation procedure given by Bryant, Hartley, and Jessen (1960). Numerical examples are given suggesting when one technique is superior to the other.     

A Comparison of Out-of-home Care for Children and Young People in Australia and Sweden: Worlds Apart?

Abstract

In this paper we present a comparative analysis of out-of-home care in Australia and Sweden. We compare the age structure of the out-of-home care population and the types of out-of-home care services provided to children and young people in both countries. Our analysis reveals that in Australia the out-of-home care service system is focused mainly on children who are deemed to be abused or neglected within their families, while in Sweden the majority of the out-of-home care population are teenagers who cannot live with their families for emotional or behavioural reasons. These population differences intersect with variations in the forms of service provision in both countries, with a much greater reliance on home-based care in Australia than in Sweden, while there is more extensive use of residential care in Sweden. We envisage that this paper will demonstrate how the age structure of the out-of-home care population, though rarely considered in international comparative child welfare research, reveals much about the assumptions on which State intervention with children and young people is based. We intend that this analysis will assist social workers to better understand and address the gaps in the quality and comprehensiveness of out-of-home care service provision to children and young people in both countries.     

“The First Mark of Pain”: Toward a child-centered methodological reorientation of social theory,race and corporal punishment in American life

The current white supremacist racial order in America fundamentally relies on fear and pain to shape the subjectivities of Black people in childhood. This violence is most visible when enacted by police officers against unarmed Black youth. A less visible yet more pernicious form of racist violence against Black children is exercised by community proxies such as Black teachers and parents. Annual government reports reveal that Black children are more likely to be injured or killed by their parents than by police. In this paper we inquire as to why, despite the many Black writers who have described parental violence as an intergenerational re-enactment of the violence of slavery, and despite decades of research on the harms of hitting children, social theorists have not analyzed how Black parents can serve as proxies for white supremacist violence. We argue that Black parenting culture has in many ways internalized the white supremacist view that corporal punishment is required to instill the discipline necessary to spare Black youth from police violence and incarceration. We conclude that until social scientists foreground the voices of Black youth in their studies, rather than adults, our ability to understand and confront the reproduction of white supremacist violence will be impeded. We argue that the physical punishment of children in Black families is an aspect of the legacy or “afterlife” of slavery. We contend that this omission persists because Black youth voices are absent from social analysis on the issue of physical punishment, existing only in clinical studies divorced from macro-sociological analysis, and we discuss how this omission occurred as a matter of scholarly history.     

Big Business in a Thin Market: Understanding the Privatization of Residential Care for Children and Youth in Sweden

This article analyzes the transformation of Swedish residential care for children from a regionally coordinated, public social service system into a thin, but highly profitable, national spot market in which large corporations have a growing presence. Marketization and privatization are theorized as complex processes, through which the institutional structure and logics of this small, but significant, social policy field changed profoundly. Using official documents, register data, media reports and existing research, three consecutive phases in the development of the children's home market are identified since the early 1980s. Change was driven on one hand by policies inspired by New Public Management, which shifted public authority horizontally to the private sector, and vertically to local authorities (funding) and to the state (regulation). On the other hand were the responses of local authorities and private actors to the changing incentives that policy shifts entailed. During the first two phases, both the proportion and size of for‐profit providers increased, and the model of family‐like care was replaced by a professional model. Cutting across the trend of privatization in the third phase was establishment of a parallel system of homes for unaccompanied refugee children – mostly in public ownership. Similarities with privatization in the English system of children's care homes are noted. By showing how the Swedish market for residential care has been created by policy and by actors’ responses to those reforms, the article provides a foundation for thinking through how the predictable, significant and well‐documented problems of such care markets might be addressed.     

A framework for comparing social protection in developing and developed countries: The example of child benefits

Abstract   The article outlines a conceptual and theoretical framework for improved comparative analysis of publicly provided social protection in developing countries, drawing on the research tradition of the study of longstanding welfare democracies. An important element of the proposed institutional approach is the establishment of comparable qualitative and quantitative indicators for social protection. The empirical example of child benefits indicates that differences between developed and developing countries should not be exaggerated, and that the prevalence of child benefits in sub-Saharan African and Latin American countries today resembles the inter-war period (1919-1938) situation in developed regions.     

Social policy and health: transition countries in a comparative perspective

T. Ferrarini, O. Sjöberg. Social policy and health: transition countries in a comparative perspective Int J Soc Welfare 2010: ??: ??–??© 2010 The Author(s), Journal compilation © 2010 Blackwell Publishing Ltd and International Journal of Social Welfare. This article analyses the development and design of unemployment insurance and family policy benefits and their links to health outcomes in Estonia, Poland, the Slovak Republic, Slovenia, the Czech Republic and Hungary from the mid‐1990s. Comparing these six transition countries with long‐standing welfare democracies reveals important similarities and differences in policy and health. Unemployment benefit schemes resemble corporatist schemes in important respects, however, with lower coverage and average benefits. Subjective wellbeing is also comparatively low among both employed and unemployed in the transition countries. Several transition countries have mixed family policy strategies that simultaneously support dual‐earner families and traditional gender roles. One clear exception is Slovenia, which has a highly developed dual‐earner support. Family policy generosity is related to lower rates of poverty, infant mortality and child injuries. The article demonstrates the fruitfulness of institutional analyses of the link between social policy and population health in a broader welfare state context.     

Family policy,economic development and infant mortality: a longitudinal comparative analysis

Ferrarini T, Norström T. Family policy, economic development and infant mortality: a longitudinal comparative analysis Int J Soc Welfare 2010: ??: ??–??© 2010 The Author(s), Journal compilation © 2010 Blackwell Publishing Ltd and International Journal of Social Welfare. In the present study, the impact of family policy legislation and economic development on infant mortality was estimated. Time series analyses indicate that economic growth decreased infant mortality in the earlier part of the 20th century, while the postwar period showed a zero or even a reversed correlation between economic development and child health. The results from fixed effects modelling of data for 18 welfare democracies for the period 1970–2000 are in line with the hypothesis that the more generous the earnings‐related parental leave benefits, the lower the infant mortality.     

Implementing a Knowledge Management System in a School of Social Work: The Possibilities,Challenges, and Lessons Learned

Managing emerging scientific, professional, and applied practice knowledge has become increasingly more important in the 21st century because economic and social connections in organizations are becoming more complex, associated with greater global connectivity. One approach to this growing complexity and emerging need involves the development of a technology-based knowledge management (KM) system. This paper describes one human service organization's attempt to implement and capture the complex knowledge needs and requirements for a knowledge management system. The implementation described is in the third year of a five year process. The challenges when incorporating such reorganization will be addressed. This case example also illustrates the complexities, possibilities, and lessons learned while implementing a knowledge management system within a school of social work and subsequently its capacity to be transferred to human service organizations.