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51.
The study assessed the effects of achievement standards, and choice of such standards, on mathematics performance in conditions where no tangible rewards were presented for reaching such standards. Elementary, junior high, and high school students performed a multiplication task in conditions where they chose standards, had standards imposed by an experimenter, or had no standards. Results demonstrated that high school students worked more multiplication problems when they chose standards than when identical standards were imposed by an experimenter or when no standards were present. Moreover, male students who chose standards worked more problems than did male students who had no standards; this effect was not found for female students.  相似文献   
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Prospective application of serum cytokines, lipopolysaccharide (LPS), and heat shock proteins (eHSPs) requires reliable measurement of these biomarkers that can signify exercise-induced heat stress in hot conditions. To accomplish this, both short-term (7 day) reliability (at rest, n = 12) and the acute responsiveness of each biomarker to exercise in the heat (pre and post 60-min cycling, 34.5°C and 70% RH, n = 20) were evaluated. Serum was analysed for the concentration of C-reactive protein (CRP), interleukin-6 (IL-6), heat shock protein 72 (eHSP72), immunoglobulin M (IgM) and LPS. Test–retest reliability was determined as the coefficient of variation (CV). Biomarkers with the least short-term within-participant variation were IL-6 (19%, ±20%; CV, ±95% confidence limits (CL)) and LPS (23%, ±13%). Greater variability was observed for IgM, eHSP72 and CRP (CV range 28–38%). IL-6 exhibited the largest increase in response to acute exercise (95%, ±11%, P = < 0.001) and although CRP had a modest CV (12%, ±7%), it increased substantially post-exercise (P = 0.02, ES; 0.78). In contrast, eHSP72 and LPS exhibited trivial changes post-exercise. It appears variation of common inflammatory markers after exercise in the heat is not always discernible from short-term (weekly) variation.  相似文献   
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Globally, the world of adult education has been much transformed in recent years. While there has been an expansion in the provision made available to adults, the profile of that provision has shifted with a greater emphasis placed on work‐related and certificated education and training, and an increased diversity in learning settings. This has led to a sense of crisis over the meaning of adult education as a specific form of provision and what it means to be an adult educator.

This article examines the ways in which these changes have found expression in the narratives through which adult educators construct their practices and experiences as meaningful. We argue that there is an interaction between the impact of contestation and change in the field of adult education and learning, its narrative or story‐telling practices and the processes by which the identities of adult educators are formed. We examine the significance of this interaction by drawing on three inter‐related themes‐‐the so‐called turn to textuality, the changes taking place in the economy and the organisation of work including the work of adult educators, and contemporary debates over (post) modern identities. In this way, we demonstrate the significance of new theoretical perspectives in providing insights into the contemporary condition of adult educators.  相似文献   
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Within contemporary changes there is an increased reflexivity wherein social formations, organizations and individuals are required to change, to learn to change, and change to learn. Lifelong learning has become central to education and economic policy, with an increased emphasis on individuals, workplaces and providers of learning opportunities becoming more flexible. This article explores some of the evidence for the emergence of different workplace practices and identities in response to and as part of the development of reflexive modernization and the significance of pedagogies of reflection in these changes. It suggests that pedagogies of reflection are integral to reflexive modernization, flexible lifelong learners and changes in the workplace.  相似文献   
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According to the U.S. Bureau of the Census, in 1998 the 65-74 years age group (18.4 million) was eight times larger than in 1900, the 75-84 years age group (12 million) was 16 times larger, and the 85 and older years age group (4 million) was 33 times larger. It is anticipated that if this trend continues, by 2030, there will be about 70 million older American persons, more than twice their number in 1998. To meet the needs of the older population, governments, foundations, nonprofit organizations, and other groups will have to continue to work on how to increase availability, accessibility, and adequacy of community-based services. One approach will be to encourage community collaboration and partnerships. Funding agencies have encouraged university-community collaboration in recent years. However, none of the studies reviewed for this paper addressed the need for the type of university-community collaboration that our study deals with (i.e., university-community agency collaboration). In particular, our study investigates human service agency workers' perceptions of the availability, accessibility, and adequacy of services to the elderly in Northwest Ohio, and how collaboration with a university can improve service delivery to consumers. The findings of the study provide a general indication of trends, experiences, and problems common to these agencies. The findings also suggest that agency workers do not necessarily have a negative perception of university-community agency collaboration, rather many do not understand how such collaborations will improve services to consumers. Recommendations regarding how to enhance university-community collaborations are made.  相似文献   
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Waterhouse J  Reilly T  Edwards B 《Journal of sports sciences》2004,22(10):946-65; discussion 965-6
International travel is an essential part of the life of elite athletes, both for competition and training. It is also becoming increasingly common among recreational sportspersons. Long-distance travel is associated with a group of transient negative effects, collectively referred to as 'travel fatigue', which result from anxiety about the journey, the change to an individual's daily routine, and dehydration due to time spent in the dry air of the aircraft cabin. Travel fatigue lasts for only a day or so, but for those who fly across several time zones, there are also the longer-lasting difficulties associated with 'jet lag'. The problems of jet lag can last for over a week if the flight crosses 10 time zones or more, and they can reduce performance and the motivation to train effectively. Knowledge of the properties of the body clock enables the cause of the difficulties to be understood (an unadjusted body clock), and forms the basis of using light in the new time zone to promote adjustment of the body clock. Sleep loss and its effects are important components of jet lag, and attempts to promote sleep by the use of melatonin and other hypnotics are also relevant. Sleep loss is also found in those who undertake challenges that involve long periods where the normal consolidated sleep of 8 h length is not possible. Advice on sleep regimens in such circumstances is given.  相似文献   
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