Postal Service

THE U.S. POSTAL SERVICE: STATUS AND PROSPECTS OF A PUBLIC ENTERPRISE by John T. Tierney (Auburn House, 14 Dedham St., Dover, MA 02030—$27.95, ISBN 0-86569-181-9)

MONOPOLY MAIL: PRIVATISING THE U.S. POSTAL SERVICE by Douglas K. Adie (Cato Institute, 224 Second St.SE, Washington, DC 20003—$19.95, ISBN 0-88738-747-0, with a cloth edition available)     

Embedded Technical Expression: Code and the Leveraging of Functionality

Abstract

In this article, I argue that a key problem for understanding the social ramifications of software is an implicit separation of software programs into two separate elements: expressive aspects, which are seen as socially driven and affectual, and functional aspects, understood as scientific and rational. In order to overcome this binary, I develop an alternative framework that examines the ways software expresses best practices, correct behaviors, and social organization. A key element of this framework is an understanding of software programs as simultaneously rhetorical and tangible objects. Given that Western society is dependent on sociotechnical systems in which software plays a crucial role, understanding the complex ways software expresses normative tasks, practices, and social orders is increasingly important.     

A re-examination of the benefits of exercise for state body satisfaction: Consideration of individual difference factors

Abstract

Although the link between exercise and body image is well documented, the considerable inter-individual variability in this relationship has been largely ignored. Therefore, the aim of the present study was to test the contributions of key body image and exercise-related moderators (age, body mass index (BMI), exercise frequency, trait body dissatisfaction, internalisation of appearance standards, and body surveillance tendencies) in predicting variability in the exercise-body satisfaction relationship. Thirty-seven undergraduate women completed a questionnaire containing the above trait-based measures and then carried a Personal Digital Assistant (PDA) for a 7-day period. Participants were instructed to use the PDA to self-report their state body satisfaction immediately following an exercise session and also when the PDA signalled at each of six random intervals throughout the day. Multilevel modelling revealed a bi-directional relationship between exercise and state body satisfaction. Moreover, post-exercise increases in state body satisfaction were strongest for individuals who were younger and engaged in regular exercise, and weakest for individuals with high BMI and/or the tendency to compare their appearance with others. These findings highlight potential limits on the efficacy of exercise-based therapy for body image disturbances.     

Conference communications

Abstract

The objective of this study was to provide anthropometric, physiological, and performance characteristics of an elite international handball team. Twenty-one elite handball players were tested and categorized according to their playing positions (goalkeepers, backs, pivots, and wings). Testing consisted of anthropometric and physiological measures of height, body mass, percentage body fat and endurance ([Vdot]O_2max), performance measures of speed (5, 10, and 30 m), strength (bench press and squat), unilateral and bilateral horizontal jumping ability, and a 5-jump horizontal test. Significant differences were found between player positions for some anthropometric characteristics (height and percentage body fat) but not for the physiological or performance characteristics. Strong correlations were noted between single leg horizontal jumping distances with 5-, 10-, and 30-m sprint times (r = 0.51–0.80; P < 0.01). The best predictors of sprint times were single leg horizontal jumping with the dominant leg and the distance measured for the 5-jump test, which when combined accounted for 72% of the common variance associated with sprint ability. In conclusion, performance abilities between positions in elite team-handball players appear to be very similar. Single leg horizontal jumping distance could be a specific standardized test for predicting sprinting ability in elite handball players.     

How Constructivist-Based Teaching Influences Students Learning Science

The purpose of this article is to provide details about the beneficial processes the constructivist pedagogy has in the area of teaching science. No Child Left Behind could possibly cause detrimental effects to the science classroom and the constructivist teacher, so this essay tells how constructivist-based teaching influences students and their learning of science.     

Sources of differential participation rates in school science: the impact of curriculum reform

School science courses have widely varying participation rates across a range of student characteristics. One of the stated aims of the 2006 Key Stage 4 science curriculum reforms in England was to improve social mobility and inclusion. To encourage students to study more science, this reform was followed by the introduction in 2008 of an entitlement to study the three separate sciences at Key Stage 4 for the more highly attaining students. This paper uses longitudinal national data over a five‐year period to investigate the extent and change of participation across science courses at KS4, focusing on student gender and socio‐economic status. It finds that whilst there is some evidence of a move towards a more equitable gender balance for some courses, there is as yet little evidence of substantial change in differential participation rates by socio‐economic status.     

Changes in mechanical properties of sprinting during repeated sprint in elite rugby sevens athletes

This study aimed to analyse fatigue-induced changes in mechanical sprinting properties during a specific repeated-sprint test in elite rugby sevens athletes. Twenty elite rugby sevens players performed ten 40?m sprints on a 30?s cycle with participant’s running back and forth in a marked lane. Radar was used to assess maximal overground sprint performance over each 40?m. Macroscopic mechanical properties (maximal horizontal force (F₀), maximal horizontal power (P_max), maximal ratio of horizontal force (RF_peak), decrease in the ratio of horizontal-to-total force (D_RF), total force and maximal sprinting velocity (v₀)) were drawn from horizontal force velocity relationships, using a validated method applied to the speed–time data. Fatigue-induced changes were analysed comparing the first sprint to an average of 2^nd-4^th, 5^th-7^th and 8^th-10^th. Repeated-sprint ability (RSA) testing induced substantial changes in the maximal velocity component, with a decrease (–15%) in v₀ (effect size (ES)?=?–2.46 to –4.98), and to a lower extent (–5.9%) in the maximal force component F₀ (ES?=?–0.59). D_RF moderately decreased (14%; ES=–0.76–1.11), and RF_peak largely decreased in the later sprints (ES?=?–0.32 to –1.27). Fatigue observed in this RSA test appeared to have a greater effect on the technical ability to produce horizontal force at high velocities, likely due to an alteration in the ability to maintain horizontally oriented force application when velocity increases rather than during the initial acceleration phase, but also the overall force production capacity. The ability to maintain forward-oriented force at high velocities is of central importance for identifying fatigue and monitoring load.     

The Correlates of Credit Loss: How Demographics,Pre-Transfer Academics,and Institutions Relate to the Loss of Credits for Vertical Transfer Students

Research in Higher Education - Despite the long-standing centrality and growing prevalence of transfer in the American postsecondary system, students, college professionals, and policymakers decry...