排序方式： 共有47条查询结果，搜索用时 402 毫秒
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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
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Demand is a major potential source of innovation, yet the critical role of demand as a key driver of innovation has still to be recognised in government policy. This article discusses public procurement as one of the key elements of a demand-oriented innovation policy. The paper starts by signaling the new significance of public procurement for innovation policy strategies at the EU level and in a range of European countries. It then defines the concept of public procurement and embeds this concept within a taxonomy of innovation policies. The rationales and justifications of public procurement policies to spur innovation are discussed, followed by a consideration of the challenges and potential pitfalls as well as appropriate institutional arrangements and strategies, including some recent empirical examples of good practice. It concludes by confronting the public procurement approach with two of the most common objections to it and by considering future prospects. 相似文献
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Schwerter Jakob Wortha Franz Gerjets Peter 《Educational technology research and development : ETR & D》2022,70(3):713-736
Educational technology research and development - E-learning opportunities have become an increasingly important component of university education. Various laboratory studies have shown that... 相似文献
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Jakob Feinig 《Journal of Cultural Economy》2020,13(5):531-547
ABSTRACT This paper proposes a novel approach for understanding money users’ relation to monetary governance institutions. It first describes the stakes involved in monetary governance from a neo-chartalist/MMT perspective. In a second step, it discusses existing contributions on the relation between money issuer and money users, highlighting the literatures on central bank legitimacy and the social construction of money. It argues that neither allows for an analysis of the relation between monetary institutions and money users that takes the latter’s knowledge seriously. It then argues that the concept of moral economy can enrich scholarly analysis. Moral economies of money are defined as collective practices in which money users articulate demands as part of an understanding of money as a public good. Finally, the paper deploys the moral economy of money perspective to reconstruct the changing relation between institutions of monetary governance and money users since the Great Depression in the U.S. It shows how New Dealers silenced a moral economy of money, discusses fragmented moral economies after World War II, and the partial reemergence of such moral economies after the Great Financial Crisis. The paper concludes by discussing political implications and suggestions for further research. 相似文献
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Laerke Sass Elín Bjarnadóttir Jakob Stokholm Bo Chawes Rebecca K. Vinding Anna-Rosa C. Mora-Jensen Jonathan Thorsen Sarah Noergaard Bjørn H. Ebdrup Jens R.M. Jepsen Birgitte Fagerlund Klaus Bønnelykke Lotte Lauritzen Hans Bisgaard 《Child development》2021,92(4):1624-1635
A double-blind randomized controlled trial of n-3 long-chain polyunsaturated fatty acid (n-3 LCPUFA) supplementation or matching placebo during third trimester of pregnancy was conducted within the COPSAC2010 mother-child cohort consisting of 736 women and their children. The objective was to determine if maternal n-3 LCPUFA pregnancy supplementation affects offspring neurodevelopment until 6 years. Neurodevelopment was evaluated in 654 children assessing age of motor milestone achievement, language development, cognitive development, general neurodevelopment, and emotional and behavioral problems. Maternal n-3 LCPUFA supplementation during pregnancy improved early language development and reduced the impact of emotional and behavioral problems. The n-3 LCPUFA supplementation was in boys associated with the earlier achievement of gross motor milestones, improved cognitive development, and a reduced impact of emotional and behavioral problems. 相似文献
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Jakob D. Jensen Katheryn Christy Melinda Krakow Kevin John Nicole Martins 《The Journal of educational research》2016,109(6):666-674
Leisure reading behavior is a key predictor of educational success. Transportability is a trait that determines how likely an individual is to become involved in a story, and past research has suggested that involvement may be related to leisure reading behavior. However, available measures of transportability have not been validated with children or related to leisure reading. To address this gap, children 9–13 years old (N = 136) completed a revised version of the Transportability Scale. A 13-item version of the scale was found to be unidimensional, reliable, and predictive of 6% of the variance in leisure reading (above and beyond sex, age, reading ability, and student performance). Transportability was also related to genre preference and several interesting sex differences emerged. The Transportability Scale provides researchers with a psychometrically sound measure of narrative involvement to advance research on leisure reading. 相似文献
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In this paper, we analyze the motives and barriers of researchers to engage in standardization in comparison with publishing and patenting. We conduct a survey on 129 researchers at the Federal Institute for Materials Research and Testing, one of Germany’s largest federal research institutes. The resultant dataset enables us to study not only the researchers’ motives and barriers but also the effect of those motives and barriers on the extent to which the respective activities are undertaken. We find that publishing constitutes a baseline activity. By contrast, patenting is driven by commercialization motives, and standardization is mainly fostered by intrinsic motivation. With respect to the barriers, we find that they are mostly inherent to the activity itself or the system in which it is performed. Finally, we discuss several options to develop a more integrative incentive system to exploit the possible synergies between standardization and publishing and patenting. 相似文献
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Word reading skills and reading‐related language and cognitive correlates were examined in Swedish 10–15‐year‐olds with autism spectrum disorders (ASD). The full group with ASD did not differ statistically from an age‐matched comparison group in word reading, but a poor‐readers subgroup was identified who displayed severe difficulties. Normal readers with ASD did not differ from the comparison group in nonverbal ability, phonological processing, rapid naming or receptive vocabulary. The poor subgroup performed, however, below on all measures except nonverbal ability. When poor readers with ASD were matched for reading level with younger controls, no difference was found on any reading‐related skill. No significant correlation was furthermore found between autistic symptomatology and word reading within the ASD group. It is concluded that the pattern of individual differences in word reading among children with ASD conforms well to that seen in children without ASD of normal or delayed reading abilities. 相似文献
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Greater fear arousal is associated with greater engagement with persuasive messages, and negative information and events are more potent than their positive counterparts. Hence loss-framed persuasive appeals, which emphasize the undesirable outcomes of noncompliance with the communicator's recommendations, should elicit greater message processing than do gain-framed appeals, which emphasize the desirable outcomes of compliance. But a meta-analytic review (based on 42 effect sizes, N = 6,378) finds that gain-framed messages engender slightly but significantly greater message engagement than do loss-framed messages. This effect is apparently not a result of whether the appeals refer to obtaining or averting negative (e.g., “skin cancer”) rather than positive (e.g., “attractive skin”) outcomes. 相似文献