Information measures and design issues in the study of mortality deceleration: findings for the gamma-Gompertz model

Lifetime Data Analysis - Mortality deceleration, or the slowing down of death rates at old ages, has been repeatedly investigated, but empirical studies of this phenomenon have produced mixed...     

Kanban optimization by simulation and evolution

The problem of the optimal design of multistage systems with Kanban control mechanism is investigated. The optimization problem generalizes those from literature by considering a general criterion function and including the lot sizes as decision variables. Since no analytical solutions can be expected simulation combined with a genetic algorithm is used. The simulator KaSimIR as well as the optimization tool LEO are briefly described. Some examples demonstrate the usability of the approach.     

Integration of Childhood Immigrants in the Short and Long Run – Swedish Evidence1

Immigrant children are often at a disadvantage at school while they adjust to their new environment. It has been found that the age at immigration of 7 or above represents a sensitive period as regards these children’s school performance for two main reasons: they have passed their prime age for language learning, and their acquisition of subject skills is less efficient while they learn to master the new language. Using Swedish administrative data, we track childhood immigrants born between 1972 and 1976 over time from adolescence (at 16) to adulthood (at 30), and study the role of age at immigration for educational and labor market outcomes. We find that immigration at a sensitive age (compared to a very young age) has a strong negative impact on compulsory school performance, but that the same individuals catch up strongly in terms of final educational attainment. In spite of this educational catching up, however, we find a considerable negative impact on earnings for men. We are able to rule out two potential mechanisms behind this puzzling result: It cannot be explained either by an impact on the chosen field of study or on completion time.     

The Power and Ethics of Social Network Intervention in Working with At-Risk Youth

Approaches that intervene in and aim to build alliances in the client’s family and network are common in child welfare, not at least in measures undertaken towards at-risk youth. The ideological components of democracy and empowerment are strong, and some claim an affinity to the “natural” problem solving of indigenous people. In the article some of these basic assumptions are called into question in the light of research on professional power and asymmetrical relations. Special attention is paid the network meeting which is supposed to shape common understanding and joint action. Eight network meetings of two network teams in Sweden were observed. The article concludes that social network intervention can be a powerful method. It can contribute to instilling hope and building alliances. However, the network meeting also produces explanations, roles and can bring premature disclosures because of the strong group dynamic forces. The power of the method therefore calls for an ethical awareness. It can be tempting to stimulate group dynamic forces to create climaxes in order to achieve “good meetings”, but the consequences are not always easy to foresee or to control.     

Attachment Styles and Self‐Image in Turkish Adolescents

The purpose of this article is to examine the attachment styles and the relation of these styles to the self‐image in Turkish adolescents. The study included 378 adolescents (196 females and 182 males) from high schools with different socioeconomic status (SES) who were administered Relationship Scale Questionnaires and Offer Self‐Image Questionnaires. The findings indicate that adolescents from a low SES had significantly low scores on self‐image scales compared with those from high and middle SES. It was found that secure attachment patterns affect social relationships and superior adjustment aspects of self‐image positively. The results of this study show that attachment patterns play an important role in the development of the self‐image, which is a crucial psychological structure gained in adolescence.     

Stress,health and the working environment of Swedish prison staff

Abstract

A random stratified sample of just over 2000 was drawn from staff working in 67 different prisons in Sweden. Questionnaires on working conditions and symptoms of ill health were administered and subjects were given health examinations. Morning plasma Cortisol and gamma glutamyltransferase (g GT) levels were measured and factual information on the prisons was collected for use in the analyses.

There were differences between prisons in terms of both objective and self-reported working conditions which appeared to affect health status, physiological state and sick leave rate. Cardiovascular and hypertensive conditions were found more often among prison staff than among a large reference group made up of many different occupations. Sick leave rates among prison staff, especially those over 45 years old, were very high compared with this reference group. The situation appeared particularly difficult in prisons with a high proportion of drug abusing inmates.

The data allowed the identification of several factors which might counteract the effects of stress at work: a proactive management style, goal consensus among staff, a high degree of decision latitude, satisfaction with work performance and a supportive psychosocial climate.