解决分布式需求的内在冲突

2006年8月,GEN(I网络创新的全球化环境)项目组公布其项目的设计原则。来自普林斯顿大学、麻省理工大学、华盛顿大学等学校的十二位专家编写了这份报告。该报告阐述了GENI的研究范围、用户的需求、需求的内在压力,以及工程设计的原则。报告指出了GENI的价值主张,广泛的部署、多样化可扩展的网络技术集合、对真实用户流量的支持仍是GENI关注的原则和方向。上期已经介绍第一部分——“分布式需求定义GENI的重心”,本期刊出第二部分——“解决分布式需求的内在冲突”。     

Thermoregulatory responses during prolonged upper body exercise in cool and warm conditions

The thermoregulatory responses of upper-body trained athletes were examined at rest, during prolonged arm crank exercise and recovery in cool (21.5 ± 0.9°C, 43.9 ± 10.1% relative humidity; mean ± s) and warm (31.5 &± 0.6°C, 48.9 - 8.4% relative humidity) conditions. Aural temperature increased from rest by 0.7 ± 0.7°C (P ? 0.05) during exercise in cool conditions and by 1.6 ± 0.7°C during exercise in warm conditions (P ? 0.05). During exercise in cool conditions, calf skin temperature decreased (1.5 ± 1.3°C), whereas an increase was observed during exercise in warm conditions (3.0 ± 1.7°C). Lower-body skin temperatures tended to increase by greater amounts than upper-body skin temperatures during exercise in warm conditions. No differences were observed in blood lactate, heart rate or respiratory exchange ratio responses between conditions. Perceived exertion at 45 min of exercise was greater than that reported at 5 min of exercise during the cool trial (P ? 0.05), whereas during exercise in the warm trial the rating of perceived exertion increased from initial values by 30 min (P ? 0.05). Heat storage, body mass losses and fluid consumption were greater during exercise in warm conditions (7.06 ± 2.25 J·g^-1 ·°C^-1, 1.3 ± 0.5 kg and 1038 ± 356 ml, respectively) than in cool conditions (1.35 ± 0.23 J·g^-1·°C^-1, 0.8 ± 0.2 kg and 530 ± 284 ml, respectively; P ? 0.05). The results of this study indicate that the increasing thermal strain with constant thermal stress in warm conditions is due to heat storage within the lower body. These results may aid in understanding thermoregulatory control mechanisms of populations with a thermoregulatory dysfunction, such as those with spinal cord injuries.     

Shirt tales: how adults adopted the replica football kit

ABSTRACT

This study seeks to identify when the replica football shirt transitioned from children’s sportswear to adult leisurewear, and explain why this occurred. Four distinct facets of this process are examined – the production of adult sizes by manufacturers, the promotion of replica shirts by clubs and retailers, purchasing by adults, and the ‘parading’, i.e. wearing of shirts at matches. Data collected from manufacturer’s catalogues, magazine adverts, match programmes and over 900 crowd photos indicates that replica shirt adoption by adult males as match-day clothing was not initially driven by an existing industry, but began as a fan-inspired process with roots in big-match fancy dress traditions, changes in wider social dress codes, and youth subcultures. Replica football shirts were adopted by adult males in distinct phases, each involving different sub-groups of fans, with the coincidental removal of barriers to wearing replica shirts more influential than manufacturer strategies or promotions. Moreover, the specific timings and drivers of each stage reflect the dramatic changes in English football culture over the last two decades of the twentieth century more accurately than the established but simplistic pre- and post-1990 World Cup or pre- and post-Premier League narratives.     

Federal subventionary activities: Policy issues and information sources

Federal funding, a complex, multi-billion dollar enterprise, comprises many activities and forms, and is ineluctably influenced by political issues and national polity. Following a history of federal funding and a typology of research and development (R&D) programs, the article examines sources of information, the role of national laboratories in nuclear weapons research, the relationship between defense grants and university standards, and problems of accountability, duplication, and trivialization of subject matter. Implicit in these examples is the thesis that no realistic analysis of federally sponsored research is possible unless examined in the larger ideological and intellectual ambience in which R&D is allocated.