Conditions for fourth order rotatability in K dimensions

In this paper, conditions for a set of points to form a rotatable design of order four have been worked out. These condi- tions form the basis for obtaining a set of rotatable designs of order four.     

Examining the link between program implementation and behavior outcomes in the lifestyle education for activity program (LEAP)

Lifestyle Education for Activity Program (LEAP) was a comprehensive, school-based intervention designed to promote physical activity in high school girls. The intervention focused on changes in instructional practices and the school environment to affect personal, social, and environmental factors related to physical activity. Multiple process evaluation tools and an organizational assessment tool were developed to monitor program implementation from a framework called the LEAP essential elements, which characterized complete and acceptable intervention delivery; secular trends were also monitored. Using process data, LEAP intervention schools were categorized into low- and high-implementing groups and compared with control schools on nine essential elements assessed at the organizational level. The Wilcoxon scores test revealed that low- and high-implementing intervention, and control schools differed significantly on two of nine administrator-reported organizational-level components: having a physical activity team and having a faculty-staff health promotion program. A mixed-model analysis of covariance indicated that, compared to control schools, a greater percentage of girls in high-implementing schools reported engaging in vigorous physical activity. Process evaluation can be used to understand the relationship between level of implementation and successful program outcome.     

Principals' perceptions of benefits and barriers to school-based suicide prevention programs

Suicidal behavior among children and adolescents is a national problem and schools can be an effective context for suicide prevention and intervention efforts. School-wide screening programs are viewed as most effective from a public health standpoint, although they garner the least support from school administrators. The purpose of this article is to examine administrators' perceptions of three school-based suicide prevention models while also capturing opinions on barriers and benefits to implementation. Data were gathered through interviews with seven principals from one Midwestern state. Findings reveal agreement among principals that schools play a key role in suicide prevention, but they differ on which type of prevention approach is most appropriate. School principals believed the school-wide screening program included more barriers to implementation than either the in-service or the curriculum-based program, largely due to the likelihood of parental disapproval. Limitations of the study and implications for improving suicide prevention efforts are discussed.     

An intelligent dynamic simulation model for designing software development processes

This paper describes a computer-aided software development process design. This is a computerized intelligent tool designed to aid managers of software development projects in planning, managing and controlling the development process of medium to large scale software projects. The application of this computerized tool should help reduce the uncertainties involved in the budget, personnel and schedule planning of software development projects.     

The impact of alcohol and marijuana use on academic achievement among college students

The present study explored the direct and indirect relationship between substance use, specifically alcohol and marijuana use, and academic achievement among college students, using skipping class as a mediator. Online self-administered surveys were distributed to undergraduate students at a mid-size university in the southeast. Individually, both alcohol and marijuana use significantly predicted GPA; as the frequency of students’ reported alcohol and marijuana use increased, GPAs decreased. However, when included in the same model, marijuana use appeared to mediate the relationship between alcohol use and GPA. Additionally, it was found that skipping class partially mediated the relationship between both alcohol use and GPA and marijuana use and GPA. Given the negative relationship that was found between substance use and academic achievement for all students in our sample, we highlight the importance of substance use prevention efforts that target students throughout the entirety of their college careers. We also discuss the limitations of current prevention efforts across college campuses that focus on alcohol use alone. We recommend that prevention efforts include a focus on marijuana use, in addition to alcohol use, especially given our current findings for marijuana use.     

Will the real faker please do a shoulder roll? Bodies,labor, and ideology in esports

Esports and the broader professionalization of playing video games demonstrates the neoliberal project's continuing expansion across new horizons. By transforming leisure into labor and extracting value from play, major gaming and digital media companies extend the commodity life of video games beyond the sale of the games themselves and into the actual play and even spectatorship of the games. As these companies continue to reframe the actual playing and watching of video games as product, the physical performance of the players' bodies becomes increasingly troublesome, a physical disruption of the media corporations' digital feedback loop.