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51.
In view of the controversial policy debate on “green” growth and corresponding stimulus packages we empirically investigate the production effects of environmental investment as well as of environmental and energy expenditures. Using a panel dataset of German manufacturing sectors our econometric analysis identifies a positive impact of environmental investment on production growth. In contrast, our estimation results cannot support the hypothesis of positive production impacts induced by environmental or energy expenditures. We thus conclude that environmental regulation should in particular stimulate environmental investment in order to be compatible with the pursuit of production growth. 相似文献
52.
Christoph Randler Eda Demirhan Peter Wüst-Ackermann Inga H. Desch 《CBE life sciences education》2016,15(1)
In science education, dissections of animals are an integral part of teaching, but they often evoke negative emotions. We aimed at reducing negative emotions (anxiety, negative affect [NA]) and increasing positive affect (PA) and self-efficacy by an experimental intervention using a predissection video to instruct students about fish dissection. We compared this treatment with another group that watched a life history video about the fish. The participants were 135 students studying to become biology teachers. Seventy received the treatment with the dissection video, and 65 viewed the life history video. We applied a pre/posttest treatment-comparison design and used the Positive and Negative Affect Schedule (PANAS), the State–Trait–Anxiety Inventory for State (STAI-S), and a self-efficacy measure three times: before the lesson (pretest), after the film treatment (posttest 1), and after the dissection (posttest 2). The dissection film group scored higher in PA, NA, and state anxiety (STAI-S) after the dissection video treatment and higher in self-efficacy after the dissection. The life history group showed no differences between the pretest and posttest 1. The dissection film has clear benefits—increasing PA and self-efficacy—that come at the cost of higher NA and higher STAI-S. 相似文献
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Christoph Pimmer Jennifer Chipps Petra Brysiewicz Fiona Walters Sebastian Linxen Urs Gröhbiel 《Technology, Pedagogy and Education》2017,26(5):517-528
This study analyses the use of a group space on the social networking site Facebook as a way to facilitate research supervision for teams of learners. Borrowing Lee’s framework for research supervision, the goal was to understand how supervision and learning was achieved in, and shaped by, the properties of a social networking space. For this purpose, the discourse between supervisor and learners was analysed along with the structural properties afforded by the space. Using the empirical findings and further literature, a conceptual framework was developed that illustrates the ways in which functional supervision, enculturation, emancipation, critical thinking and relationship development are achieved and formed by the interplay of the technological, functional, multimodal and the wider sociocultural, political and sociolinguistic structures associated with social media space. 相似文献
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For sports actors, social media provide the opportunity to bypass sports journalism's gatekeeping function and to disseminate sports-related information to target groups directly. Thus, social media have been conceptualized as a competitor to journalism. We argue that the relation is much more diverse. We differentiate between competitive, integrative, and complementary facets of the relationship between sports journalism and social media. Our study focuses on complementarity and analyzes how far social and mainstream media serve as sources for each other. Therefore, we combine an online survey among 122 German sports journalists, an analysis of the Twitter networks of German sports journalists during the Winter Olympics 2014, and a content analysis of the most popular news items in social media. Results suggest that sports journalists perceive social media accounts of athletes as beneficial news sources, especially to gather inside information. Huge sports events influence the social media activities of sports journalists as they tend to have stronger connections to athletes at these times. Whereas social media appear to be significant sources for sports journalism, sports media content receives little attention in social media. However, our results indicate that sports journalism and social media indeed maintain a complementary relation. 相似文献
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Kirstin Hallmann Cristina Muñiz Artime Christoph Breuer Sören Dallmeyer Magnus Metz 《Journal of Cultural Economics》2017,41(4):467-487
Participation in sport and participation in cultural activities are usually studied separately. However, since both activities dominate the leisure time of most individuals, it is reasonable to analyse simultaneously the determinants of participation in both activities. Informed by the economic household theory, this study examined the core factors of time, income, human capital as well as several socio-demographic factors. The results showed that there was as small but significant correlation between sports and cultural participation. Thus, both can be described as complementary and competing activities. Leisure time, gender, education, nationality and subjective well-being were significant predictors of both sports and cultural participation. Differences were found for the variables age and income. This paper also describes the characteristics of those individuals who are not likely to participate in either activity and emphasises the importance of social inclusion programmes. 相似文献
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Karsten Koehler Neele R. Hoerner Jenna C. Gibbs Christoph Zinner Hans Braun Mary Jane De Souza 《Journal of sports sciences》2016,34(20):1921-1929
Low energy availability, defined as low caloric intake relative to exercise energy expenditure, has been linked to endocrine alterations frequently observed in chronically energy-deficient exercising women. Our goal was to determine the endocrine effects of low energy availability in exercising men. Six exercising men (VO2peak: 49.3 ± 2.4 ml · kg?1 · min?1) underwent two conditions of low energy availability (15 kcal · kg?1 fat-free mass [FFM] · day?1) and two energy-balanced conditions (40 kcal · kg?1 FFM · day?1) in randomised order. During one low energy availability and one balanced condition, participants exercised to expend 15 kcal · kg?1 FFM · day?1; no exercise was conducted during the other two conditions. Metabolic hormones were assessed before and after each 4-day period. Following both low energy availability conditions, leptin (?53% to ?56%) and insulin (?34% to ?38%) were reduced (P < 0.05). Reductions in leptin and insulin were independent of whether low energy availability was attained with or without exercise (P > 0.80). Low energy availability did not significantly impact ghrelin, triiodothyronine, testosterone and IGF-1 (all P > 0.05). The observed reductions in leptin and insulin were in the same magnitude as changes previously reported in sedentary women. Further research is needed to understand why other metabolic hormones are more robust against low energy availability in exercising men than those in sedentary and exercising women. 相似文献