Integrated project operations and personnel scheduling with multiple labour classes

The main theme of this paper is improving project schedules by integrating the scheduling of project jobs and labour resources. An ILP model is presented of the integrated project operations and personnel scheduling problem with multiple labour categories. Traditionally, this problem is solved in two steps: first, operations are scheduled by solving the resource-constrained project scheduling problem; then, labour categories are scheduled by solving the personnel days-off scheduling problem. The proposed model combines the two stages into an integrated problem, which is solved in one step. Using 48 test problems, the two methods were compared in terms of total cost, labour cost and scheduling efficiency. The results clearly indicate that the integrated model outperforms the traditional two-step method.     

Understanding and Utilizing Parallel Processes of Social Interaction for Attachment-based Parenting Interventions

In an effort to meet both the parenting and treatment needs of substance-abusing women who are parents, residential drug treatment programs have been struggling to find the best approach. A qualitative-quantitative study of the parenting experience of mothers in residential drug treatment programs housing both mothers and their children found that relational processes characterized how these mothers perceived parenting as well as treatment. The findings presented the interplay and mutuality between a mother’s interactions (natural or facilitated) with the external social world that includes her child and those connected to the treatment facility and the internal formation of her sense of herself, her child, and others, along with the changes in both areas that took place in the facility. These findings lend important support to the use of attachment-based parenting interventions in residential drug treatment programs by drawing on these relational processes.

Migration,masculinity, and family

Previous studies of migration, family, and gender have shown that migration is not only an event that changes family life, the change itself is a gendered process. How migrant women develop strategies to cope with challenges posed by either their own migration or their husbands’ migration has been widely studied. However, how migrant men adjust and change their care practices and domestic roles to accommodate challenges brought about by migration to their family lives has not been as extensively explored. Using interview data gathered from male rural-to-urban migrant workers in South China, this paper fills this gap by studying male migrants’ agency and masculinity through the concept of masculine compromise. Masculine compromise delineates how migrant men strive to respond to changing family circumstances triggered by migration while maintaining the gender boundaries that underpin their dominance within the family. As a concept, masculine compromise underscores the material impact of migration on gender practices and family life; and the limited effect it has on gender attitudes and identity. Masculine compromise provides a feminist lens to analyse the complex effect of migration on changing masculinity and gender relationships within the family.     

"Rollbahn mord": the early activities of Einsatzgruppe C

Einsatzgruppe C was active in the Ukraine and became responsible for the murder of Jews, including the Babi-Yar massacre at Kiev. At first, men only were murdered, but after a number of weeks, women and children became victims, too. The Einsatzgruppe was assisted in its task by the Wehrmacht, the German police, other units of the SS and by both individuals and organized groups of local Ukrainians and Germans. Though no clear orders regarding the scope of the Final Solution seem to have been given, Einsatzgruppe C relentlessly continued pursuing its victims until the act of murder itself became routine.     

Majority vote of even and odd experts in a polychotomous choice situation

The performance of majority vote by an odd number of voters in a dichotomous situation is a much-studied subject. In this paper, we study the performance of group consensus in a situation of polychotomous choice. The differences in majority vote behaviour between even and odd numbers of expert panellists are examined, and the effects of adding new members are derived. Unlike the dichotomous model, optimality in the present context may not be uniquely defined, so the probabilities of the consensus being correct or erroneous are both considered as the number of experts is increased.     

Developments in and prospects for external debt position and burden of developing countries: The case of Korea

The delay of strong economic recovery by industrialized nations, slowed world export growth, and higher interest rates have worsened the financial situation of a number of developing countries which have relied on external borrowings to sustain current account deficits and protect economic development. Recently, well-publicized concerns over the ability to these countries to repay their considerable debt burden have been raised. To shed light on these concerns, the paper focuses on Korea—one of the heavier debt-holding countries. It describes the process through which Korea has acquired its external debt over the past decade, assesses the trends in its debt burden, and presents prospects for the period 1982–1986. Using the Korean experience, the paper shows that the most common indicators used for evaluating foreign debt burden, such as the long-term service ratio, need to be supplemented by other measurements. In a world economy characterized by short-term debts with variable interest rates, the paper suggests that an important tool in analyzing the external debt burden should be the short-term debt burden.     

Issues in Complementary Health Insurance in Belgium

This article attempts to assess the increasing role of complementary social insurance in healthcare in Belgium. As different players attempt to fill in the lacunae of the statutory social security scheme, the demarcation of their sphere of action and of their mutual relationship is becoming problematic. It is therefore interesting to see the evolution of solidarity and selectivity. The analysis of both categories and products in complementary health insurance indicates the limitations and the bottlenecks in coming years for the social security scheme on the one hand and complementary social insurance on the other.     

DDMA-charts: Nonparametric multivariate moving average control charts based on data depth

Summary: This paper studies the DDMA–chart, a data depth based moving–average control chart for monitoring multivariate data. This chart is nonparametric and it can detect simultaneously location and scale changes in the process. It improves upon the existing r– and Q–chart in the efficiency of detecting location changes. Both theoretical justifications and simulation studies are provided. Comparisons with some existing multivariate control charts via simulation results are also provided. Some applications of the DDMA–chart to the analysis of airline performance data (collected by the FAA) are demonstrated. The results indicate that the DDMA–chart is an effective nonparametric multivariate control chart.*Research supported in part by grants from the National Science Foundation, the National Security Agency, and the Federal Aviation Administration. The discussion on aviation safety in this paper reects the views of the authors, who are solely responsible for the accuracy of the analysis results presented herein, and does not necessarily reect the official view or policy of the FAA. The dataset used in this paper has been partially masked in order to protect confidentiality.