Living climate change     

Dörries  Matthias 《Metascience》2021,30(1):87-89

  相似文献   

Kein Heimvorteil in der 1. Tischtennisbundesliga der Herren     

Timo Klein-Soetebier  Annabelle Senff  Matthias Weigelt 《Sportwissenschaft》2014,44(2):71-77

A home field advantage is given when the home team wins more than half of the games under home conditions. For team sports, this advantage has been well-established in many studies. The present study examines the home field advantage for individual sports on the example of table tennis. Therefore, all games of the men’s first German National League of table tennis (n?=?406) were analyzed for the seasons 2008/2009 to 2012/2013. There was a home field advantage of 51.48?%. A more specific measure for the home field advantage is to look at single games (“best-of-five” modus), where the home teams won more games (2.01 per competition) than the away teams (1.95 per competition). Both results were statistically not significant. A statistically significant correlation between the size of the home field advantage and the number of spectators was found, as well as an advantage by competition rules of the home team in the opening game, whereas the travel distances of the away teams did not affect the results. Accordingly, the home field advantage is less pronounced in individual sports than in team sports. The player’s performance, however, is positively influenced by the social support of home spectators and the specific competition rules.  相似文献   

Zwischen Wollen, aber nicht k?nnen und K?nnen, aber nicht wollen: übergangsprobleme von Jugendlichen in Japan am Beispiel der ?Freeter“ und ?NEETs“     

Mikiko Eswein  Matthias Pilz 《International Review of Education/Internationale Zeitschrift für Erziehungswissenschaft/Revue internationale l'éducation》2012,77(11):505-531

Die Untersuchung von übergangsprozessen vom Bildungs- in das Besch?ftigungssystem ist vor dem Hintergrund der Jugendarbeitslosigkeit von besonderer Bedeutung. In Japan wird der übergang vielfach als gelungen tituliert. In den letzten Jahren mehren sich allerdings Zeichen, die auf eine ver?nderte Sachlage hindeuten. Der vorliegende Aufsatz analysiert diese Problematik am Beispiel der beiden japanischen Personengruppen „Freeter“ und „NEET“. Dabei handelt es sich um Jugendliche und junge Erwachsene, die nicht (direkt) in ein regul?res Besch?ftigungsverh?ltnis eintreten. Zun?chst werden hier die Ursachen analysiert, dann werden bildungspolitische Ma?nahmen zur Beseitigung der Probleme kommentiert. Durch die Heranziehung von wissenschaftlich fundierten Erkl?rungsans?tzen wird gezeigt, dass sich die beiden genannten Personengruppen durch eine geringe formale Schulqualifikation auszeichnen. Die soziale Herkunft ist hingegen nicht von entscheidender Relevanz, allerdings deutet sich an, dass die finanziellen M?glichkeiten der Eltern hinsichtlich des Besuchs von hochrangigen Bildungsinstitutionen zunehmend an Bedeutung gewinnen. Die in der japanischen ?ffentlichkeit vielfach konstatierten abweichenden Werte und Einstellungen dieser jüngeren Personengruppen lassen sich auf Basis der existenten empirischen Befunde gleichfalls nicht eindeutig fundieren. In der Konsequenz sind Gründe für die übergangsprobleme eher in Zusammenhang mit einer durch die lang anhaltende Wirtschaftskrise angespannten Arbeitsmarktlage auszumachen. Neben einigen Initiativen der Bildungspolitik wird es für Japan daher in Zukunft darauf ankommen, die Integration der schrumpfenden Schul- und Hochschulabg?ngerkohorten effizient zu regulieren.  相似文献   

A computational fluid dynamics model for wind simulation: model implementation and experimental validation     

Zhuo-dong?ZhangEmail author  Ralf?Wieland  Matthias?Reiche  Roger?Funk  Carsten?Hoffmann  Yong?Li  Michael?Sommer 《浙江大学学报(A卷英文版)》2012,13(4):274-283

To provide physically based wind modelling for wind erosion research at regional scale, a 3D computational fluid dynamics (CFD) wind model was developed. The model was programmed in C language based on the Navier-Stokes equations, and it is freely available as open source. Integrated with the spatial analysis and modelling tool (SAMT), the wind model has convenient input preparation and powerful output visualization. To validate the wind model, a series of experiments was conducted in a wind tunnel. A blocking inflow experiment was designed to test the performance of the model on simulation of basic fluid processes. A round obstacle experiment was designed to check if the model could simulate the influences of the obstacle on wind field. Results show that measured and simulated wind fields have high correlations, and the wind model can simulate both the basic processes of the wind and the influences of the obstacle on the wind field. These results show the high reliability of the wind model. A digital elevation model (DEM) of an area (3800 m long and 1700 m wide) in the Xilingele grassland in Inner Mongolia (autonomous region, China) was applied to the model, and a 3D wind field has been successfully generated. The clear implementation of the model and the adequate validation by wind tunnel experiments laid a solid foundation for the prediction and assessment of wind erosion at regional scale.  相似文献   

Tell me why! Content knowledge predicts process-orientation of math researchers’ and math teachers’ explanations     

Andreas Lachner  Matthias Nückles 《Instructional Science》2016,44(3):221-242

  相似文献   

Light damage to selected organic materials in display cases: A study of different light sources     

Matthias Farke  Marcello Binetti 《文物保护研究》2016,61(1):83-93

The protection of works of art and cultural assets against light-induced aging is vital when planning exhibitions. Newly developed lighting systems render the selection of suitable light sources more difficult, not least in the context of energy–economical systems. This study accordingly examines different lighting systems (fluorescent tubes, halogen lamps, low-voltage metal halide lamps, and LED lamps) in terms of the damage potential they hold for the materials concerned. The changes in color were evaluated using the CIEDE2000 color-difference formula. This study focuses on selected organic materials and shows that changes in color already occur after only a brief exposure time. The color changes induced by the fluorescent tubes were consistently more intense than those induced by the other light sources. The results obtained with the remaining lamps show that the color changes depend more on the material under investigation than on the source used. The changes determined after a relatively short exposure period (five months) vividly demonstrate that exposing sensitive materials to light for longer terms (as is the case during a permanent exhibition) is most definitely a non-viable option.  相似文献   

Effect of ultraviolet photofunctionalization of dental titanium implants on osseointegration     

Christian Mehl  Matthias Kern  Friederike Neumann  Telse Bähr  Jörg Wiltfang  Volker Gassling 《Journal of Zhejiang University. Science. B》2018,19(7):525-534

  相似文献   

The Benefits of Mouse Keeping—an Empirical Study on Students’ Flow and Intrinsic Motivation in Biology Lessons     

Annika Meyer  Konstantin Klingenberg  Matthias Wilde 《Research in Science Education》2016,46(1):79-90

  相似文献   

Students’ motivation in biology lessons—can student autonomy reduce the gender gap?     

Großmann  Nadine  Hofferber  Natalia  Wilde  Matthias  Basten  Melanie 《European Journal of Psychology of Education - EJPE》2023,38(1):409-434

When it comes to biology lessons in Germany, girls generally exhibit higher levels of self-determined motivation than boys. Previous research suggests that fostering student autonomy could be a way to effectively address this gender gap. To investigate gender-related effects in biology education, a sample of 303 sixth-grade students (M_age = 11.31 years, SD_age = 0.58 years) participated in a 3-h teaching unit on harvest mice that was taught in either an autonomy-supportive or controlling manner. The results revealed a significant effect of the treatment on self-determined motivation, with the effect being stronger for the boys. In the treatment with controlling teaching behavior, gender-related differences in self-determined motivation became apparent. In contrast, the gender gap was mainly smaller in the treatment with autonomy-supportive teaching behavior. Thus, the results suggest that satisfying the need for autonomy appears to be an effective means to help bridge the gender gap in biology lessons.

  相似文献   

Joining forces for public value creation? Exploring collaborative innovation in smart city initiatives     

Oliver Neumann  Christian Matt  Benedikt Simon Hitz-Gamper  Lisa Schmidthuber  Matthias Stürmer 《Government Information Quarterly》2019,36(4):101411

Creating public value is a key goal of public administrations, both in their daily business and in the growing field of smart government and smart cities, which focuses on IT-enabled innovations in the public sphere. However, many public administrations still struggle with such innovations due to complex technologies, high investments, and the numerous stakeholders involved. To address this issue, some local governments in continental Europe have turned to collaborative innovation approaches, partnering with (semi-)public utility companies in the hope that their additional innovation assets will boost innovativeness. Nevertheless, it remains unclear how exactly such collaborations should be governed to ensure that the focus remains on creating public value, as utility companies may have their own agendas. To explore this question, we conducted a comparative case study in the context of smart city initiatives with four cases in Swiss local governments. Drawing on agency and stewardship theory, we then propose a model of public-value-focused collaborative innovation, enabling us to explore various collaboration characteristics and their effects on public value creation. Our findings suggest that both agency- and stewardship-based collaborations increase innovativeness. However, while agency collaborations tend to produce smart city innovations that mainly serve the utility companies' business interests, stewardship relationships lead to innovations that are focused more on public value creation. As such, our study extends the literature on the effects of collaborative innovation on public value, and it provides practical recommendations on how such collaborative innovation should be designed.  相似文献