Effects of a structured midsole on spatio-temporal variables and running economy in overground running     

Tobias Wunsch  Josef Kröll  Thomas Stöggl  Hermann Schwameder 《European Journal of Sport Science》2017,17(3):303-309

Research to enhance running performance has led to the design of a leaf spring-structured midsole shoe (LEAF). In treadmill running, it has been shown that LEAF led to an increased running economy and increased stride length (SL) through a horizontal foot shift during stance compared to a standard foam shoe (FOAM). The purpose of this study was to analyse whether (a) these findings can also be observed in overground running and (b) relations exist between spatio-temporal variables and running economy. Ten male long-distance heel-strike runners ran at their individual 2?mmol/l blood lactate speed with LEAF and FOAM in randomized order. Kinematic data were recorded with an inertial measurement unit synchronized with 2D video. Oxygen consumption was measured using an automated metabolic gas analysis system. Blood lactate was collected after each run. The strike pattern was unaffected by LEAF. SL was increased by 0.9?±?1.1?cm (95% CI 0.2 to 1.5; p?=?.040; d_z?=?0.76), stride rate (SR) was reduced by ?0.4?±?0.3?strides/min (95% CI ?0.6 to ?0.1; p?=?.029; d_z?=?0.82) and oxygen consumption tended to be reduced by 1% (?0.4?±?0.6?ml/min/kg; 95% CI ?0.8 to 0.0; p?=?.082; d_z?=?0.62) when running with LEAF compared to FOAM. Changes in oxygen consumption in LEAF were correlated with SL (r?=?0.71; p?=?.022) and SR (r?=??0.68; p?=?.031). It can be concluded that LEAF has the potential to cause small changes in spatio-temporal variables during running. Runners increasing SL and decreasing SR in response to LEAF can achieve small improvements in running economy, which is beneficial in terms of performance.  相似文献   

Reform der Sportlehrer-Ausbildung     

Hans-Gert Artus  Norbert Baumann  Reiner Bussek  Hermann Gall  Hans Jensen  Christiane Müller  Konrad Stripp  Claus Tiedemann  Peter Weinberg  Clemens Menze 《Sportwissenschaft》1974,4(1):99-103

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Evolution as a controversial issue: a review of instructional approaches   总被引：1，自引：1，他引：0  

Ronald S. Hermann 《Science & Education》2008,17(8-9):1011-1032

Although evolution has long been considered a controversial issue, little effort has been made to ensure that instructional approaches address the controversial nature of the issue. A framework for understanding the nature of controversy and some defining characteristics of controversial issues are provided. In light of this framework evolution is evaluated to address the defining characteristics of the issue that make it controversial. The purpose of this exploratory review of evolution instruction is to identify a range of instructional approaches reported in extant literature and to determine the extent to which each approach is commensurate with teaching evolution as a controversial issue.  相似文献   

40 Jahre TR 440     

Hermann Engesser 《Informatik - Forschung und Entwicklung》2008,22(4):201-202

Ohne Zusammenfassung  相似文献   

Book Reviews: WINTELER, ADI. 2004. Professionell lehren und lernen. Ein Praxisbuch. Darmstadt: Wissenschaftliche Buchgesellschaft. 183 pp. ISBN 3-534-17258-2.     

Hermann Josef Abs 《International Review of Education/Internationale Zeitschrift für Erziehungswissenschaft/Revue internationale l'éducation》2005,51(2-3):254-255

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Higher Education Supported by New Technologies at the Technical University of Dresden—Problems and Initiatives     

Achim Mehlhorn  Wolfgang Ihbe  Hermann Körndle  Klaus Meissner  Susanne Narciss  Alexander Schill 《Higher Education in Europe》1998,23(2):205-216

This article summarizes the technical efforts and scientific experience that have been recognized as essential for the introduction of multimedia technologies for innovative teaching and learning at the Technical University of Dresden. Beginning with conventional standards, the most important media types are discussed. Important criteria for the development of multimedia tools are investigated. Finally, the first results of a pilot project of teleteaching are reported. This article emphasizes that new didactic and psychological studies are of the same level of importance for learning success as is technological development. Therefore, the strategy envisaged does not aim at developing the virtual university in its purest form but at the enrichment of the contemporary university by innovative elements that preserve the living contact between teachers and students.  相似文献   

Mode of neutralizing the local attraction of iron ships on the compass     

M.Hermann Kopp 《Journal of The Franklin Institute》1845,40(3):198-199

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Book reviews     

Hermann Josef Abs 《International Review of Education/Internationale Zeitschrift für Erziehungswissenschaft/Revue internationale l'éducation》2006,52(5):479-504

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Coexistence of plastic and partially diffusive phases in a helium-methane compound     

Hao Gao  Cong Liu  Andreas Hermann  Richard J Needs  Chris J Pickard  Hui-Tian Wang  Dingyu Xing  Jian Sun 《国家科学评论(英文版)》2020,7(10):1540

Helium and methane are major components of giant icy planets and are abundant in the universe. However, helium is the most inert element in the periodic table and methane is one of the most hydrophobic molecules, thus whether they can react with each other is of fundamental importance. Here, our crystal structure searches and first-principles calculations predict that a He₃CH₄ compound is stable over a wide range of pressures from 55 to 155 GPa and a HeCH₄ compound becomes stable around 105 GPa. As nice examples of pure van der Waals crystals, the insertion of helium atoms changes the original packing of pure methane molecules and also largely hinders the polymerization of methane at higher pressures. After analyzing the diffusive properties during the melting of He₃CH₄ at high pressure and high temperature, in addition to a plastic methane phase, we have discovered an unusual phase which exhibits coexistence of diffusive helium and plastic methane. In addition, the range of the diffusive behavior within the helium-methane phase diagram is found to be much narrower compared to that of previously predicted helium-water compounds. This may be due to the weaker van der Waals interactions between methane molecules compared to those in helium-water compounds, and that the helium-methane compound melts more easily.  相似文献   

Science—Its philosophy and spirit     

Hermann Bondi 《Resonance》1996,1(7):82-95

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