Computer experiment designs for accurate prediction

Computer experiments using deterministic simulators are sometimes used to replace or supplement physical system experiments. This paper compares designs for an initial computer simulator experiment based on empirical prediction accuracy; it recommends designs for producing accurate predictions. The basis for the majority of the designs compared is the integrated mean squared prediction error (IMSPE) that is computed assuming a Gaussian process model with a Gaussian correlation function. Designs that minimize the IMSPE with respect to a fixed set of correlation parameters as well as designs that minimize a weighted IMSPE over the correlation parameters are studied. These IMSPE-based designs are compared with three widely-used space-filling designs. The designs are used to predict test surfaces representing a range of stationary and non-stationary functions. For the test conditions examined in this paper, the designs constructed under IMSPE-based criteria are shown to outperform space-filling Latin hypercube designs and maximum projection designs when predicting smooth functions of stationary appearance, while space-filling and maximum projection designs are superior for test functions that exhibit strong non-stationarity.     

Disaster preparedness networks in rural Midwest communities: Organizational roles,collaborations, and support for older residents

ABSTRACT

This study investigated the roles and interconnections among community organizations belonging to local disaster coalitions in Midwest in supporting older residents. Representatives from 44 organizations participated in one-time survey. Most were non-profit (68%) or federal/state/local government agencies (23%). The analyses of 761 relationships showed stronger collaborations in assessment (average strength=2.88 on a 5-point scale), emergency response (2.72), and planning (2.61); and weaker collaborations in co-sponsoring programs (1.71) and supporting older residents (2.03). The extent of collaboration (network density) to support older adults was also low. Coalitions may enhance network density and centralization by developing sub-committee structure and strengthening existing collaborations.     

Brief Screening and Intervention for Alcohol and Drug Use in a College Student Health Clinic: Feasibility,Implementation, and Outcomes

Abstract

Objective: Evaluation of the Brief Alcohol Screen and Intervention in College Students (BASICS) in a university primary care setting. Participants/Methods: Undergraduates (N = 449) participated in BASICS and electronic surveys assessing frequency/quantity of alcohol and drug use, psychosocial and mental health outcomes, and demographic information. Data were collected at baseline and 6-month follow-up between August 2006 and August 2008. Results: Drinking and drug use decreased between baseline and 6 months. Participants reported an increase in protective factors and in readiness to change alcohol-related behaviors, and a decrease in alcohol-related consequences and in distress symptoms. Heavy episodic drinking at baseline significantly moderated the changes in number of drinks in a typical week and in a typical weekend, and number of drinks on the occasion drank most on a weekend. Conclusions: BASICS can be implemented in a primary health care setting and university students may reduce their alcohol and/or drug use.     

F.O.R.E.play: The Utility of Brief Sexual Health Interventions Among College Students

Abstract

Objectives: The authors aimed to determine the most effective brief sexual health intervention for college students, while also evaluating students’ preferences for learning about sexual health, in order to develop a university program. Methods: A total of 302 students enrolled in an introductory college course participated and were randomly assigned to 1 of 3 brief interventions during a regularly scheduled class and completed pre- and postsurveys assessing knowledge, motivation to use condoms, and condom self-efficacy. Results: Findings indicated that having an actual person in charge of the learning process resulted in higher knowledge gains and highlighted a student preference for discussion-based learning, viewing pictures of sexually transmitted infections, and hearing real-life experiences about the consequences of unsafe sex. Conclusions: These findings will be used to tailor a future intervention targeting college students for use with freshmen students at this university.     

Thinking Critically

This study evaluated a ten-week course designed for social work field instructors interested in developing a critically reflective approach to field instruction. The course trained participants to think critically about their role in preparing professional social workers. A pretest-posttest nonequivalent comparison group design was utilized. The Watson-Glaser Critical Thinking Appraisal was used as the measurement instrument. Using t-tests, the findings indicate that the participants significantly increased their overall ability to think critically when compared to the control group. The implications for practicum instruction are addressed.     

Conflict in Divorcing and Continuously Married Families: A Study of Marital,Parent–Child and Sibling Relationships

ABSTRACT

Family members in both separated or divorcing and married families completed a range of questionnaires about the conflict in 3 relationships—couple, parent–child, and sibling—across 2 phases of the study approximately 12 months apart. In addition, the adolescents completed measures of adjustment: self esteem, depression, and anxiety. Adolescents in a subset of the divorcing families were interviewed about the conflict in their families across the 2 phases (107 at Phase 1 and 35 at Phase 2). Analyses showed that conflict was higher in the separated or divorcing families across all 3 relationships, and that the highest levels of conflict occurred for the high-conflict divorcing families. Qualitative data from interviews illustrated the nature of the conflict that was occurring.     

Children as Witnesses: Understanding Their Capacities,Needs, and Experiences

Historically the law regarded children as inherently unreliable and made it difficult for them to testify. Since 1975 awareness of child abuse has increased and research has established that children can be reliable witnesses. Governments began to recognize the needs and capacities of children and enacted legal reforms to facilitate prosecutions for child abuse. This paper reports on a survey of victim witness workers and other justice system professionals which reveals some of the continuedfailings of that system in dealing with children. Althoughrelatively rare, there are cases of false allegations of abuse, usually a result of investigations by poorly trained professionals. Further legal reforms and better human supports are required to ensure that the needs of children are met and their capacities as witnesses are fully appreciated.     

Should There Be Mentoring Efforts to Help Retain and Recruit More Males Into Baccalaureate and Master's Social Work Programs?

Social work programs need to actively set mechanisms in place to attract more men into a predominately female academic major through mentoring, recruitment, and retention efforts. This article conducts a review of the literature to examine whether mentoring efforts should be directed at male social work students. It is inconsistent for the social work profession to embrace the concept of providing culturally competent practices to clients but fail to address and combat a significant gender gap in the delivery of services to male clients.