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51.
We compared cardiorespiratory responses to exercise on an underwater treadmill (UTM) and land treadmill (LTM) and derived an equation to estimate oxygen consumption (VO2) during UTM exercise. Fifty-five men and women completed one LTM and five UTM exercise sessions on separate days. The UTM sessions consisted of chest-deep immersion, with 0, 25, 50, 75, and 100% water-jet resistance. All session treadmill velocities increased every 3 min from 53.6 to 187.8 m x min(-1). Cardiorespiratory responses were similar between LTM and UTM when jet resistance for UTM was 50%. Using multiple regression analysis, weight-relative VO2 could be estimated as: VO2 (mLO2 c kg(-1) x min(-1)) = 0.19248 x height (cm) + 0.17422 x jet resistance (% max) + 0.14092 x velocity (m x min(-1)) -0.12794 x weight (kg)-27.82849, R2 = .82. Our data indicate that similar LTM and UTM cardiorespiratory responses are achievable, and we provide a reasonable estimate of UTM VO2.  相似文献   
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This article considers the Australian entry score system, the Australian Tertiary Admissions Rank (ATAR), and its usage as a selection mechanism for undergraduate places in Australian higher education institutions and asks whether its role as the main selection criterion will continue with the introduction of demand driven funding in 2012. Admission strategies for undergraduate places in Australian universities have remained unchanged for many years. The author concludes that the current entry scheme, the ATAR, will continue as a dominant selection criterion particularly for courses where demand exceeds supply, but ATAR-based selection will be insufficient to meet the participation targets set by the federal government. There is now an opportunity for universities to differentiate themselves by their admission strategies and to improve participation of equity groups through the normalisation of alternative entry mechanisms.  相似文献   
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Internationalization of educational publishing promises fresh perspectives and new solutions—but not if US-based editors, reviewers, and readers fail to recognize the significance of research conducted outside the USA. This essay explores the concept of “significance” in the context of peer review of journal articles, and explains why US-based reviewers easily miss the social importance and the intellectual interest of research conducted elsewhere. It points to several steps that can be taken to increase publication of the full global range of educational scholarship.  相似文献   
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In this article, I describe how Jane Butler Kahle’s intellectual curiosity, commitment to equity and her ability to use various research approaches, to establish research and networking groups comprised of scholars from diverse backgrounds, theoretical perspectives and geographic locations, to disseminate research outcomes and findings through scholarly publications, service on policy committees and mentoring of other scholars framed a career in science education that has impacted students, teachers, and researchers. Jane synergistically and tirelessly combined her research, teaching, and service to identify, challenge and reduce inequities in science education in the US and throughout the world because for her it was important that all students have access to quality science education.  相似文献   
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Despite the impact of genetics on daily life, biology undergraduates understand some key genetics concepts poorly. One concept requiring attention is dominance, which many students understand as a fixed property of an allele or trait and regularly conflate with frequency in a population or selective advantage. We present the Dominance Concept Inventory (DCI), an instrument to gather data on selected alternative conceptions about dominance. During development of the 16-item test, we used expert surveys (n = 12), student interviews (n = 42), and field tests (n = 1763) from introductory and advanced biology undergraduates at public and private, majority- and minority-serving, 2- and 4-yr institutions in the United States. In the final field test across all subject populations (n = 709), item difficulty ranged from 0.08 to 0.84 (0.51 ± 0.049 SEM), while item discrimination ranged from 0.11 to 0.82 (0.50 ± 0.048 SEM). Internal reliability (Cronbach''s alpha) was 0.77, while test–retest reliability values were 0.74 (product moment correlation) and 0.77 (intraclass correlation). The prevalence of alternative conceptions in the field tests shows that introductory and advanced students retain confusion about dominance after instruction. All measures support the DCI as a useful instrument for measuring undergraduate biology student understanding and alternative conceptions about dominance.  相似文献   
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