A Simple New Algorithm for Quadratic Programming with Applications in Statistics

Problems involving estimation and inference under linear inequality constraints arise often in statistical modeling. In this article, we propose an algorithm to solve the quadratic programming problem of minimizing for positive definite Q, where is constrained to be in a closed polyhedral convex cone , and the m × n matrix is not necessarily full row rank. The three-step algorithm is intuitive and easy to code. Code is provided in the R programming language.     

Sing … Then Think: Musical Interventions and Nondeliberative Forms of Practice in Social Work Groups

ABSTRACT

The positive effects of music have been demonstrated worldwide in many fields including social work, psychology, medicine, and education. Musical interventions including music listening, lyric analysis, and singing have also been found effective in group work. This article, guided by Norma Lang’s nondeliberative theory, aims to provide the “why,” “when,” and “how” of incorporating music into social work groups. It also provides the reader with a toolbox of musical interventions and the encouragement to utilize these “artful, actional, and analogic” activities in group work.     

Comparison of Support Vector Machines to Other Classifiers Using Gene Expression Data

The efficiency of independent controling variates in simulation of activity networks will be evaluated in the sense of mean square deviation of the estimator from the true value. The given result is asymptotic     

Sexual abuse and sexual functioning in a chronic pelvic pain sample

Sexual abuse, particularly childhood sexual abuse, has been linked to chronic pelvic pain and to sexual dysfunction, though the sexual functioning of survivors of sexual abuse has not been studied in a chronic pain population. Sixty-three women with chronic pelvic pain completed measures of sexual function, sexual abuse, and pain. Using an index of the extent of sexual abuse experiences in childhood and adolescence/adulthood, higher scores were related to lower rates of sexual activity, less satisfaction with orgasm and feelings of closeness with sexual partners, and greater severity of and interference from pain. Findings point to the importance of controlling for relationship status in analyses of long-term effects of sexual abuse and of assessing chronic pelvic pain patients for histories of sexual abuse using measures that address the extent or severity of abuse.     

Preference for same-race health care providers and perceptions of interpersonal discrimination in health care

This article examines black Americans' preference for black health care providers. Using data from a national survey, we assess how blacks 'perceptions of discrimination are related to preference for same-race health care providers. Overall, the belief that discrimination is frequent in different-race doctor-patient dyads is associated with greater preference for a same-race provider However; the belief that discrimination occurs regardless of a doctor's race reduces preference for a same-race provider Finally, general perceptions of discrimination are distinct from concerns about personally being treated unfairly, and low personal concern about unfair treatment reduces preference for a same-race provider among those who believe that interpersonal discrimination occurs frequently. These results suggest a complex picture of how perceptions of discrimination influence preferred race of health care provider among blacks in the United States.     

If you feed them, will they come? The use of social marketing to increase interest in attending a college alcohol program

The authors used social marketing to design and test advertisement components aimed at increasing students' interest in attending an alcohol program focused on reaching students who drink heavily, although the authors offered no such program. Participants were undergraduate students in introductory psychology courses (N = 551). Questionnaires included measures assessing demographic information, alcohol use and negative consequences, and interest in attending an alcohol program in response to exposure to 1 of 12 systematically varied advertisements. The authors found that approximately 20% of participants across all ad types indicated some level of interest in attending the alcohol program. Students who use alcohol reported more interest in attending when an informational message was used. Of the participants offered food, 41.9% indicated the food offered in the advertisement impacted their interest in attending. Results suggest market segmentation plays a role in developing effective advertisements to recruit different groups of students based on their reported drinking behavior.