The acute testosterone,growth hormone,cortisol and interleukin-6 response to 164-km road cycling in a hot environment     

Jakob L. Vingren  Ronald G. Budnar Jr.  Amy L. McKenzie  Anthony A. Duplanty  Hui-Ying Luk  Danielle E. Levitt 《Journal of sports sciences》2016,34(8):694-699

This study investigated the acute endocrine responses to a 164-km road cycling event in a hot environment. Thirty-four male experienced cyclists (49.1 ± 8.3 years, 86.8 ± 12.5 kg, 178.1 ± 5.1 cm) participating in a 164-km road cycling event were recruited. Blood samples were collected within 0.3–2.0 h before the start (PRE: ~0500–0700 h) and immediately following the ride (POST). Samples were analysed for testosterone, growth hormone (GH), cortisol and interleukin-6 (IL-6). The temperature and humidity during the event were 35.3 ± 4.9°C and 47.2 ± 14.0%, respectively. Based on the finishing time, results for the fastest (FAST, 305 ± 10 min) and the slowest (SLOW, 467 ± 31 min) quartiles were compared. At POST, testosterone concentration was significantly (P < 0.05) lower (PRE, 20.8 ± 8.6; POST, 18.2 ± 6.7 nmol · L^?1), while GH (PRE, 0.3 ± 0.1; POST, 2.3 ± 0.3 µg · L^?1), cortisol (PRE, 661 ± 165; POST, 1073 ± 260 nmol · L^?1) and IL-6 (PRE, 4.0 ± 3.4; POST, 22.4 ± 15.2 pg · mL^?1) concentrations were significantly higher than those at PRE. At POST, GH and cortisol were significantly higher for the FAST group than for the SLOW group (GH, 3.6 ± 2.0 and 1.0 ± 0.8 µg · L^?1; cortisol, 1187 ± 209 and 867 ± 215 nmol · L^?1). Participation in an ultra-endurance road cycling event in a hot environment induced significant acute changes in concentrations of circulating hormones, with a greater augmentation of GH and cortisol in those completing the ride fastest.  相似文献   

A critical view of urban literacy: A case study of successful high school english teachers     

Theresa Rogers  Mari M. McLean 《The Urban Review》1994,26(3):173-185

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Choice behavior in transition: Development of preference in a free-operant procedure     

James E. Mazur  Theresa A. Ratti 《Learning & behavior》1991,19(3):241-248

Twenty acquisition curves were obtained from each of 8 pigeons in a free-operant choice procedure. Every condition began with a phase in which two response keys had equal probabilities of reinforcement, and, as a result, subjects’ responses were divided fairly evenly between the two keys. This was followed by a phase in which one key had a higher probability of reinforcement than the other, and the development of preference was observed. In all but a few cases, response proportions increased for the key with the higher probability of reinforcement. In most conditions, the two probabilities differed by .06, but the actual probabilities varied (from .16 and .10 in one condition to .07 and .01 in another). Development of preference for the key with the higher probability of reinforcement was slower when the ratio of the two reinforcement probabilities was small (.16/.10) than when it was large (.07/.01). This finding is inconsistent with the predictions of several different quantitative models of acquisition, including the kinetic model (Myerson & Miezin, 1980) and the ratio-invariance model (Horner & Staddon, 1987). However, the finding is consistent with a hypothesis based on Weber’s law, which states that the two alternatives are more discriminable when the ratio of their reinforcement probabilities is larger, and, as a result, the acquisition of preference is faster.  相似文献   

Caregiving as refusal in the academy*     

Theresa Ambo 《International journal of qualitative studies in education》2018,31(3):215-222

Abstract

Literature on American Indian student support in postsecondary education illustrates the importance of relationality in creating a positive college experience for Native students. That said, much of the literature examining ‘care relationships’ in Indian education focuses on student outcomes, with less attention given to the experiences of practitioners. Thus, the purpose of this paper is twofold. First, the author examines where and how American Indian higher education practitioners learned principles of communal care for supporting Indigenous students in non-Native postsecondary institutions. Second, she explores how these principles act as homesteads of mutuality to love, transform, resist, and enact refusal within the academy. She draws upon the literature on American Indian student support in postsecondary education, which illustrates the importance of relationality in creating a positive college experience for Native students.  相似文献   

The high road : Ben Bova. 289 pages,diagrams, 6 × 9 in. Houghton-Mifflin,New York 1981. Price, $11.95.     

I.M. Levitt 《Journal of The Franklin Institute》1982,313(2):120-121

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In between home and homeland: Diaspora identity as a cultural hybrid in Mohsen Namjoo’s “Cielito Lindo”     

Theresa Parvin Steward 《Popular Communication》2017,15(3):207-220

ABSTRACT

Rather than resisting either new or old culture, Iranian musicians in the diaspora embrace both their new host environments and their native homeland, as they create a place between cultural assimilation and preservation, helping to shape new sounds of exile. This essay explores how Iranian musicians embrace the new and the familiar, the traditional and the popular, creating an original cultural hybrid. Questions of cultural identity and the politics of location and displacement are addressed using a theoretical cultural studies framework, incorporating themes of personal and collective nostalgia. This discussion is supplemented by documented narrative experiences from Iranian musicians and artists. Furthermore, the textual and musical analysis of singer-songwriter Mohsen Namjoo’s readaptation of the familiar Mexican ranchera song “Cielito Lindo” uncovers unique nuances and layers of meaning that not only shed light on one musician’s personal journey to exile, but also speak to a greater collective experience of Iranians today who continue to be torn between home and homeland.  相似文献   

“Can't Nobody Sleep” and Other Characteristics of Culturally Responsive English Instruction     

Theresa A. Adkins 《Multicultural Perspectives》2013,15(2):73-81

In this article the author presents a collective case study of two English teachers identified as particularly successful with Black students. Through the use of ethnographic techniques, the study provides a snapshot of how these teachers facilitated academic gains in urban high schools through their use of culturally responsive English instruction.  相似文献   

New worlds: discoveries from our solar system : Werner von Braun and Frederick I. Orday. 284 pages,diagrams, illustrations, 6x9 in., Anchor Press/Doubleday. New York, 1979. Price, $24.95.     

I.M. Levitt 《Journal of The Franklin Institute》1980,309(3):191-192

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FROM DOUBLE JEOPARDY TO DOUBLE INDEMNITY: SUBTLETIES OF TEACHING INTERDISCIPLINARY GERIATRICS     

Theresa J. K. Drinka 《Educational gerontology》2013,39(6):433-449

Each of the fields of geriatrics and interdisciplinary practice intensifies the usefulness and effectiveness of the other. Combining geriatrics and interdisciplinary practice also magnifies the complexity of two singularly complex fields. However, the subtle reasons for their complexity may escape the understanding of clinicians, educators, policy makers, and administrators. Attempting to treat older patients who have complex problems while ignoring common principles of geriatrics and teamwork can cause a kind of double jeopardy. It can potentially harm the patient and decrease the provider's sense of mastery. Training either students or health care providers to appreciate the interactions and the complexities of these two fields could produce a double indemnity for the health care system and for older persons who need health care. It requires recognizing subtle factors like the barrier of presumed knowledge, the interpretation of the meaning of function, frailty, the lure of medical technology, professional hierarchies, diverse views of disease, and the myth of insufficient evidence.  相似文献   

Nuclear spin relaxation     

Malcolm H. Levitt 《Resonance》2015,20(11):986-994

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