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Two facets of leisure, perceived determinants of well-being and enjoyment of common leisure activities, were investigated in 388 participants. For well-being, a principal components (PCA) analysis yielded five components: competence, relatedness and health, wealth, personal values, and freedom of choice. For the enjoyment of leisure activities, another PCA generated seven components: wellness, sedentary leisure, intellectual leisure, social leisure, routine activities, self-realization, and inner peace. Different leisure enjoyment of young adults (18–30 years old) in contrast to adults and seniors was attributed to social transformations as also predicted by several theories of social change. The relationship between the determinants of well-being and enjoyment of leisure activities was statistically significant but meaningfully debatable.  相似文献   
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Parents’ influence on and monitoring of children’s television use has been investigated intensely. In recent years international research has identified different environmental and family factors which influence active mediation, restrictive mediation, and co-viewing. However, there has been no systematic simultaneous comparison of the impact of these factors in German-speaking Switzerland. Therefore the present study analyzes the impacts of parental attitudes as well as family and environmental factors on parental mediation of children’s TV use simultaneously. 252 parents of children aged 3 to 14 answered questions concerning the impact factors, their mediation behaviour as well as children’s media use. Results confirm findings from international research: Most important for parental mediation styles are parental attitudes and the family communication style as well as children’s age. Structural and other sociodemographical factors seem to be less important.  相似文献   
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This systematic review analyses literature on the work of hybrid value creation, i.e. the process of generating additional value by innovatively combining products (tangible component) and services (intangible component). A state of the art report on hybrid value creation is delivered by first systematically identifying and then analyzing 169 publications focusing on hybrid value creation. The identified publications are clustered into eight categories based on their links and interactions and thus a mapping of this evolving field is suggested. A discussion and reflection of the findings with respect to the pervasiveness of literature and the research methodologies used is provided. The paper concludes by identifying some dominant strategic gaps in the overall research landscape and provides directions for future research.  相似文献   
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To continue balancing supply and demand for power is a growing challenge on Germany’s path to producing 80?% of its electricity from renewable sources by 2050. Large-scale investment into a range of technologies will be required to provide the flexibility necessary for balancing. This paper introduces a simple analytical framework to evaluate the German legislator’s numerous efforts to address this challenge. It then proceeds to make two proposals as to how flexibility can be sourced more cheaply. Priority should be given to measures that enable the existing power markets to generate stronger rewards for flexibility. We thus call for financial incentives for variable electricity tariffs to elicit more consumer response and for investment subsidies instead of feed-in tariffs for more demand-oriented renewable power generation. If additional explicit incentives for flexibility are necessary, they can be provided through a market for flexibility.  相似文献   
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Based on a longitudinal case study of four interorganizational product development collaborations, this paper identifies a lure to cross‐functional integration that has hereto been neglected. In particular, findings suggest that when the buyer firm separates the Research and Development (R&D) Department from the Procurement Department, the two departments play a good cop–bad cop strategy toward the supplier. Thereby, they are able to foster a high level of goodwill trust between R&D personnel of the collaborating firms, while procurement personnel maintain a high level of formal control. Using an intricate sample design with polar cases, the study shows that cross‐functional integration of the two departments hampers interorganizational goodwill trust at the benefit of formal control. The findings offer a way forward for managers seeking to reap the benefits of collaboration, while limiting their exposure to the associated risks.  相似文献   
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This contribution analyses the development of power generation from geothermal energy in Germany. It considers research funding schemes, the support through the german Renewable Energy Sources Act (EEG) and the role of decisive actors as well as technical, economic and societal framework conditions. Compared to other renewable energy sources research funding for geothermal energy had played an inferior role in the past. After the potentials for geothermal power generation had been underlined by a study in 2003, geothermal power gained more political and institutional advocates. Subsequently it was equipped with a higher tariff in the EEG 2004 and led to realization of demonstration projects. Yet, the appliance of technologies for electrical power transformation, ORC and Kalina, are at the very beginning. Presently, the geothermal energy industry consists of a small amount of medium-sized businesses. Regional and nationwide energy providers, acting as operators and investors, do not exert much pressure in view of limited returns. Despite the compatibility with existing power supply systems, constraints to the expansion of geothermal energy use — above all exploration risks and high drilling costs- are likely to lead to a step-by step enhancement rather than a rush.  相似文献   
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