DETERMINING OPTIMAL SHIFT SCHEDULES FOR TELEPHONE TRAFFIC EXCHANGE OPERATORS

A branch and bound algorithm is presented for determining the minimum number of telephone operators, and their shift schedules, required to meet demand that varies over a 24 hour operating period. An integer linear programming formulation is used, and the algorithm is described in terms of its separation, relaxation, fathoming, and branching procedures. Computational results are provided, using actual operating data. The results indicate that practical sized problems can be solved by the algorithm, involving as many as 100 different shift type variables and demand profiles typical of those encountered in many telephone traffic exchanges.     

After a Disaster: Lessons in Survey Methodology from Hurricane Katrina

In 2005, the National Science Foundation funded a number of projects to study the impact of Hurricane Katrina. The current article provides an overview of several research approaches used to conduct post-Katrina research. Each method had some advantages and disadvantages. The post-disaster context meant that experience from traditional survey methods often did not apply. Comparisons of advantages and disadvantages associated with each sampling method serve to inform future post-disaster research and illuminate the limits of classical research methods.     

THE EFFECTIVENESS OF FAMILY INTERVENTIONS IN THE TREATMENT OF PHYSICAL ILLNESS

Although a large body of research demonstrates that the family has a powerful influence on physical health, the evidence for the effectiveness of family interventions in physical illness is less conclusive. Family therapy and other family interventions appear to be most effective in chronic childhood illnesses such as asthma and diabetes. Family interventions have also been shown to be effective in the management of some cardiovascular and neurologic disorders and for the treatment of obesity. Family therapy appears to be more effective than individual therapy for some groups of patients with anorexia nervosa. This research supports the increasingly important role of medical family therapy in the new health care system. Recommendations for future research are discussed.     

Adoption Issues: Preparation of Psychologists and an Evaluation of the Need for Continuing Education

This study is an investigation of the level of preparation psychologists have in dealing with adoption issues and an assessment of the need for further education in treating triad members. A questionnaire was mailed to 497 psychologists randomly selected from the National Register of Health Service Providers in Psychology who received doctoral degrees between the years of 1990 and 1996. Two hundred and ten psychologists, all of whom were currently treating clients, participated in the study. Psychologists completed a Likert rating of their sense of preparation to treat triad members. The largest group (51%) rated themselves as Somewhat prepared, with the second largest group (23%) rating themselves as Not very prepared. Ninety percent reported they needed more education in adoption, and 81% reported interest in taking a continuing education course in adoption. Of the 210 participants, only 67 reported taking courses that dealt with adoption as part of their formal education. Of those psychologists who reported taking courses that involved adoption, they averaged only 1.3 courses during their undergraduate education, and 1.5 courses during graduate education, while the remaining 143 psychologists received no education in this area. When one considers the proportion of triad members seen clinically, this study suggests psychologists need more education and background information about the effects of the adoption process.     

Pseudolikelihood estimation in a class of problems with response-related missing covariates

Many practical situations involve a response variable Y and covariates X , where data on (Y, X ) are incomplete for some portion of a sample of individuals. We consider two general types of pseudolikelihood estimation for problems in which missingness may be response-related. These are typically simpler to implement than ordinary maximum likelihood, which in this context is semiparametric. Asymptotics for the pseudolikelihood methods are presented, and simulations conducted to investigate the methods for an important class of problems involving lifetime data. Our results indicate that for these problems the two methods are effective and comparable with respect to efficiency.     

Development of intercultural competence among US American teachers: professional development factors that enhance competence

The increasing diversity of the student age population in the USA calls for increased cultural competence on behalf of educators to effectively teach students. This article reports on a study of a suburban school district’s initiatives that utilized the Development Model of Intercultural Sensitivity, the Intercultural Development Inventory (IDI) as a baseline measurement tool, and subsequent professional development for teachers, to promote the development of intercultural competence. ANOVA and regression analysis models were used to determine the variables that affect teachers’ perceived intercultural competence after their participation in professional development.