Effect of surrogate design on the measured stiffness of snowboarding wrist protectors

In snowboarding, the wrist is the most common injury site, as snowboarders often put their arms out to cushion a fall. This can result in a compressive load through the carpals coupled with wrist hyperextension, leading to ligament sprains or carpal and forearm bone fractures. Wrist protectors are worn by snowboarders in an effort to reduce injury risk, by decreasing peak impact forces and limiting wrist extension to prevent hyperextension during falls. There is no international standard or universally accepted performance specification that snowboarding wrist protectors should conform to, resulting in an inability to judge which designs offer the best protection. This study investigated how surrogate arm design affected the stiffness of wrist protectors during quasi-static mechanical testing. Three surrogate arms with increasing design complexity were used to test three wrist protectors. The results show that surrogate design does influence the stiffness of snowboarding wrist protectors. Given that the surrogate does influence protector performance, it is recommended that a standard surrogate design is established for research and product testing.     

Sport and the New Culture of the ‘Second Golden Age’: Amsterdam’s Sporting Entrepreneurs in the 1880s and 1890s

Abstract

In the second half of the nineteenth century, Amsterdam underwent important changes in its economic, social, and cultural life as the city entered what is often referred to as its ‘Second Golden Age’. Old elites gave way to new and a new more entrepreneurial culture emerged focused on mass, visible, and consumable activities, including sport, in which the body played a central role. This was especially apparent from the late 1870s and 1880s when spatial changes within the city helped to ensure that sport was increasingly the location for new kinds of associational activity and the development of new products, all underpinned by the potential for profit. Entrepreneurs such as Perry & Co., De Gruyter, and the Amsterdamsche Sport-Club were able to effect strategic combinations between the new body culture and consumerism, producing a range of new products and exploiting new technologies to create new markets. In seizing these opportunities, Amsterdam's entrepreneurs were also reproducing the concept of the trainable, measurable, and consumable body.     

Energy expenditure and dietary intake in professional football players in the Dutch Premier League: Implications for nutritional counselling

ABSTRACT

Selecting effective dietary strategies for professional football players requires comprehensive information on their energy expenditure (EE) and dietary intake. This observational study aimed to assess EE and dietary intake over a 14-day period in a representative group (n = 41) of professional football players playing in the Dutch Premier League (Eredivisie). Daily EE, as assessed by doubly labelled water, was 13.8 ± 1.5 MJ/day, representing a physical activity level (PAL) of 1.75 ± 0.13. Weighted mean energy intake (EI), as assessed by three face-to-face 24-h recalls, was 11.1 ± 2.9 MJ/day, indicating 18 ± 15% underreporting of EI. Daily EI was higher on match days (13.1 ± 4.1 MJ) compared with training (11.1 ± 3.4 MJ; P < 0.01) and rest days (10.5 ± 3.1 MJ; P < 0.001). Daily carbohydrate intake was significantly higher during match days (5.1 ± 1.7 g/kg body mass (BM)) compared with training (3.9 ± 1.5 g/kg BM; P < 0.001) and rest days (3.7 ± 1.4 g/kg BM; P < 0.001). Weighted mean protein intake was 1.7 ± 0.5 g/kg BM. Daytime distribution of protein intake was skewed, with lowest intakes at breakfast and highest at dinner. In conclusion, daily EE and PAL of professional football players are modest. Daily carbohydrate intake should be increased to maximize performance and recovery. Daily protein intake seems more than adequate, but could be distributed more evenly throughout the day.     

The Rise of Athletic Masculinity at the Carlisle Indian School, 1904–1913

Following the dismissal of Captain Richard Pratt from the position of superintendent in 1904, the Carlisle Indian School entered a new era. The school became more focused on vocational education and moved away from offering immediate civilisation to the students. The school even promoted Indian arts and crafts. This move was also reflected in sport at Carlisle. The school became determined to construct a successful athletic programme. This resulted in the rise of masculine gamesmanship among the athletes. This, combined with racial pride, formed the basis of the athletes' manhood in the post-Pratt era. Yet, despite the demonstration of superior masculinity through victories, the school still positioned the students as subordinate to white men. The players were portrayed as comparatively unintelligent; they were apparently incapable of actually coaching the team.     

Changes in academic research performance over time: A study of institutional accumulative advantage

This study examines changes in institutional research performance over time by analyzing data from four national surveys of the American professoriate conducted between 1969 and 1988. To assess whether groups of institutions may be accumulating advantage relative to others, research activities are compared across five Carnegie institution types. Weights are created to adjust for sampling differences and research output measures are standardized to adjust for variation by discipline. Findings show an overall strengthening of research emphasis reflected by a stronger orientation toward research (more faculty holding Ph.D.'s and having a primary interest in research) and higher research output (grant and publication performance). While Research-I universities have retained their initial (1969) advantage, they have not accumulated more. Meanwhile, Doctoral-Granting-I universities have gained strength relative to Research-II institutions. Research at Comprehensive-I was also up, but at a slower rate than the other Carnegie groups.     

Visually impaired children: Development and implications for education

This paper examines some of the models used for conceptualizing the possible developmental implications of blindness and severe visual impairment. It takes up the question of the significance in infancy of certain skills and proficiencies, especially motor, that may be impeded by the lack of vision. The paper then addresses such issues for the school age child as access to literacy, with the emphasis being on ways of mitigating the potentially educationally handicapping consequences of visual disability. Educational technology is cited as one of the principal means available to teachers for meeting these challenges, and examples are given of procedures and devices that are being explored. A central argument is that for psychologists, teachers, and educational technologists the search must be to pinpoint the specific and changing needs of the individual learner.     

Re-assembling knowledge production with(out) the university

ABSTRACT

As an introduction to the themed issue, this paper interrogates the idea of university unbundling through a critical reading of Ronald Coase’s theory of transaction costs. Coase, who was initially interested in the structure of firms, later applied his transaction cost theory more broadly to anything that might be defined as ‘welfare’. Not unlike other abstract economic theories, in the age of market discipline, Coase’s ideas have been widely employed to regulate the provision of public goods. Read through Coase, the main effect of the unbundling discourse has been to rationalise the university – to make it subject to a logic of efficiency as an end, and ultimately we suspect, to do damage to universities as important institutions for the cultivation of democratic values and socio-economic justice. After a brief summary of the other six papers included in the issue, the paper concludes with a discussion of the possibility of maintaining a public university in light of the neoliberal discourse of unbundling.     

Perspectives on pedagogical change: instructor and student experiences of a newly implemented undergraduate engineering dynamics curriculum*

Engineering education has been slow to adopt research-based educational innovations. Few prior works on such adoption have investigated the combined classroom experiences of instructors and students when such innovations are being implemented. Therefore, this work focuses on the lived experiences of an instructor and her students when adopting an active, blended, and collaborative learning environment, known as Freeform, in a second-year dynamics course. Weekly reflections from the instructor were processed alongside student interviews using Thematic Analysis to discern prominent themes in their perspectives for comparison and discussion. The results indicate that the instructor navigated internal tensions between her previous instructional preferences and the philosophy and resources of Freeform. Similarly, students had to adapt to this new philosophy and suite of resources that were uncommon for their institution. Ultimately, this work highlights the contextual natures of teaching and learning, and how situational factors can influence educational innovation.