排序方式： 共有17条查询结果，搜索用时 31 毫秒
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Daniel A. Bizjak Fabian Tomschi Gunnar Bales Elie Nader Marc Romana Philippe Connes Wilhelm Bloch Marijke Grau 《运动与健康科学(英文)》2020,9(6):595-603
ObjectiveTo examine the impact of a 6-week endurance training on red blood cell (RBC) aging and deformability of healthy participants to detect possible improved hemorheological and performance-related adaptations.MethodsA total of 31 participants (17 females and 14 males) performed a 6-week moderate training protocol (three 1-h running sessions per week at 70% of maximal heart rate). Blood was sampled before and after the training. RBCs from each participant were fractioned according to density and age into 4 RBC subfractions. Subfractions were examined for changes of RBC properties, including aging distribution, RBC deformability, RBC microparticles, and phosphatidylserine concentrations. RBC and plasma nitrite levels were measured as indicators of nitric oxide metabolism.ResultsAerobic performance, peak oxygen consumption, ventilatory thresholds, velocity at the aerobic–anaerobic threshold, and lactate at exhaustion improved after training. The relative amount of both young RBCs and old RBCs increased, and the amount of the main RBC fraction decreased. Phosphatidylserine externalization and RBC-derived microparticles decreased. Overall deformability expressed as shear stress required to achieve half-maximum deformation to theoretical maximal elongation index at infinite shear stress improved in unfractioned RBCs (p < 0.001). Nitrite decreased in total (p = 0.001), young (p < 0.001), main (p < 0.001), and old (p = 0.020) aged RBCs and in plasma (p = 0.002), but not in very old RBCs.ConclusionThese results indicate that non-endurance-trained healthy participants benefit from a regular moderate running training program because performance-related parameters improve and a younger RBC population with improved RBC properties is induced, which might support oxygen supply in the microcirculation. 相似文献
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While a great many studies have dealt with medieval poetry, they have failed to discuss the poetry of longing (?anīn) as a separate genre, independent of other genres, especially elegies (in particular poems that lament the fate of cities) and poems of salvation and lament. Nor has any study so far undertaken a comparison between works of this genre by Muslim and by Jewish poets.In this article, we shall discuss the growth of the poetry of longing in Muslim Spain and provide a number of examples of verses composed by Muslim and Jewish poets who were born in the cities of Andalusia and shared a common fate: many of them were persecuted for a variety of reasons and forced into a life of wandering and exile, and suffered banishment, imprisonment and torture. The ways they expressed their longing for their native cities possessed similarities but also differences, depending on the way each such poet perceived the land of the west and the scenes of his native city. The differences were particularly marked with respect to the way Jewish poets viewed the cities in which they had been born. 相似文献
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McKenzie TL Sallis JF Broyles SL Zive MM Nader PR Berry CC Brennan JJ 《Research quarterly for exercise and sport》2002,73(3):238-244
We assessed the relationship between young children's movement skills and their physical activity in early adolescence. Balance, agility, eye-hand coordination, and skinfold thicknesses in 207 Mexican American and Anglo American children (104 boys, 103 girls) were measured at ages 4, 5, and 6 years. Habitual physical activity was assessed at the age of 12 years by two interviewer-administered 7-day recalls. Ethnic differences in movement skills were not found. Young girls were better at jumping and balancing, and young boys were better at catching. Tracking of skills was low, and children's early childhood skills were not related to their physical activity 6 years later. Further studies involving additional movement skills and other populations are recommended to determine if enhanced movement skills in children promote subsequent physical activity. 相似文献
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Adrian Lees Nader Rahnama 《Sports biomechanics / International Society of Biomechanics in Sports》2013,12(3):283-292
The purpose of this paper was to establish the variability and typical error of kinematic and kinetic variables representing the maximal instep kick in soccer for both the kicking and support legs. Ten skilled (good amateur or semi-professional) soccer players performed 20 maximal instep kicks of a stationary ball into a goal mouth. Motion of the kicking and support legs was recorded by an optoelectronic motion analysis system, and a six degrees of freedom model was used to compute kinematic and kinetic variables. Participants repeated the kicks on a second day at least 1 week later. The mean within-subject coefficient of variation across the kinematic and kinetic variables, trials, and days was 16% and did not change substantially as trial number increased or between day of test. Increasing trial number reduced the typical error (as determined by the standard error of the mean) such that for 20 trials 75% of the variables were below an arbitrary 5% threshold. It was concluded that for kicking investigations, 10–15 trials could be used and typical errors of 5% should be expected. 相似文献
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Viren Swami Stefan Stieger Jakob Pietschnig Ingo W. Nader Martin Voracek 《Learning and individual differences》2012,22(3):404-408
There currently exists a dearth of research on the transmission and assimilation of myths. To overcome this limitation, we developed a novel scale that measures belief in science-related myths. A total of 363 participants completed this new scale along with measures of personality (the Big Five factors), anti-scientific attitudes, and New Age orientation. Exploratory factor analysis showed that the items of the belief in myths scale could be reduced to two factors concerning human-related and non-human-related myths. Both factors were internally reliable, were moderately inter-correlated, and were not rated significantly differently by women and men (although human-related myths were rated as significantly more believable than non-human-related myths). Further analysis showed that only human myths were significantly predicted by anti-scientific attitudes and the Big Five factor of Extraversion. These results are discussed in relation to the promotion of scientific literacy. 相似文献
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Fatemeh Sheikhshoaei Nader Naghshineh Sirous Alidousti Maryam Nakhoda Hossein Dehdarirad 《Library & information science research》2021,43(3):101101
Development of a digital library demands extensive financial, human, and technological investments. Appropriate models and measurement tools are required to achieve the goals of these libraries to assess them. This research was conducted with the aim of developing and validating a tool to measure the maturity of a digital library based on the “digital library maturity model” (DLMM). Two sources including literature and experts' opinion were used to determine the criteria for each code. Expert opinion and confirmatory factor analysis were used to confirm the content and construct validity of the developed tool, respectively. The reliability of the designed tool was examined by the Cronbach's alpha test. Finally, the designed tool validity and reliability were confirmed. Managers of digital libraries can use this tool to understand the maturity level of their digital libraries and plan to improve the library or to attain advanced levels of maturity. 相似文献
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Higher Education - This paper seeks to categorize and analyze the organizational culture and organizational culture components – leadership style, decision-making modes, standards of... 相似文献
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This article examines the implications for access and equity of the Syrian government’s efforts to reform higher education
in the country over the past decade. In the context of social and economic reforms that are moving the county from a state-controlled
to a social market economy, it focuses on adequacy in financing higher education, as well as efficiency and equity. Significant
progress has been made in access to higher education. The government has introduced a rich variety of options for accessing
higher education, resulting in a doubling of enrolled students over the past 10 years. In terms of equity, the gender gaps
in higher education enrollment and completion have all but disappeared nationally, although regional variations persist. The
study raises concerns about the system’s internal and external efficiency: despite some improvements, the quality of the curricula
and their relevance for the labour market remain serious issues. 相似文献
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