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1.
A seasonal mixed-POT model to estimate high flood quantiles from different event types and seasons 总被引:1,自引:0,他引:1
Svenja Fischer 《Journal of applied statistics》2018,45(15):2831-2847
Flood events can be caused by several different meteorological circumstances. For example, heavy rain events often lead to short flood events with high peaks, whereas snowmelt normally results in events of very long duration with a high volume. Both event types have to be considered in the design of flood protection systems. Unfortunately, all these different event types are often included in annual maximum series (AMS) leading to inhomogeneous samples. Moreover, certain event types are underrepresented in the AMS. This is especially unsatisfactory if the most extreme events result from such an event type. Therefore, monthly maximum data are used to enlarge the information spectrum on the different event types. Of course, not all events can be included in the flood statistics because not every monthly maximum can be declared as a flood. To take this into account, a mixture Peak-over-threshold model is applied, with thresholds specifying flood events of several types that occur in a season of the year. This model is then extended to cover the seasonal type of the data. The applicability is shown in a German case study, where the impact of the single event types in different parts of a year is evaluated. 相似文献
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Among the financing strategies available for Open Access (OA), the author-pays business model has received increasing attention. The consequences of this approach, however, for the system of scholarly communication and for publishing houses as participants in value added, have remained largely unclear. The paper presented here, therefore, analyzes the probable realistic magnitude of publishing fees in different subjects, based on empirical data. The paper shows that the most favorable conditions are met in the Natural Sciences and in Mathematics. However, the analysis also shows that publishing houses would have to raise publishing fees well beyond the level that scientists are willing to pay. Furthermore, the analysis leads to the conclusion that the amount of money currently available in the system of scholarly communication is probably not sufficient for the sustainable financing of publishing fees. 相似文献
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Christoph Breuer Kirstin Hallmann Pamela Wicker Svenja Feiler 《European review of aging and physical activity》2010,7(2):61-70
Due to the demographic situation in nowadays societies, physical activity, and sport expenditure have to be analysed from
a demographic as well as socio-economical perspective. This means that determinants such as age, gender, nationality/ethnicity,
income, time, educational level, profession, and social status have to be taken into account. However, when comparing the
various studies, the different methods of analysis and different operationalisation of variables have to be considered. This
is in particular vital investigating age. Whilst cross-sectional studies point out that physical activity generally decreases
with increasing age, longitudinal analyses come to different results. Previous studies indicate that pertaining to gender
more men take part in sports than women. However, considering period and cohort effects, recent longitudinal studies showed
that women participate more in sport than in the past. Besides, it was found out that men generally tend to spend more money
on sports than women do. A further finding is that the educational level influences physical activity positively. Research
revealed that income had a positive impact on both, physical activity and sport expenditure. 相似文献
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Ibsen Bjarne Elmose-Østerlund Karsten Feiler Svenja Breuer Christoph Seippel Ørnulf Van der Roest Jan-Willem Scheerder Jeroen 《Voluntas: International Journal of Voluntary and Nonprofit Organizations》2019,30(5):1148-1163
VOLUNTAS: International Journal of Voluntary and Nonprofit Organizations - Non-profit associations are usually democratically organized, and this feature plays a legitimizing role for the public... 相似文献
7.
Bettina Rulofs Svenja Feiler Lea Rossi Ilse Hartmann‐Tews Christoph Breuer 《Children & Society》2019,33(3):270-285
Based on the theoretical framework of organisational capacity and using data from an online survey of 8571 sports clubs in Germany, this study investigates clubs’ engagement towards child protection and the prevention of sexual violence. Only half of the clubs indicate that the prevention of sexual violence is a relevant topic for them, and on average, the clubs have implemented between two and three prevention measures. Pertaining to organisational capacity, human resource capacity (e.g. share of volunteers, share of women on the board) and structural capacity (e.g. club culture) exhibit significant effects on clubs’ activation towards child protection. 相似文献
8.
Voluntary Work‐related Technology Use during Non‐work Time: A Narrative Synthesis of Empirical Research and Research Agenda 下载免费PDF全文
The Internet and mobilization of information and communication technologies (ICTs) have made non‐manual work increasingly portable and remotely accessible. As a result, a considerable number of employees use their ICTs to engage in work‐related tasks during designated non‐work time, even without contractual obligation. However, existing research on such voluntary work‐related ICT use remains fragmented and spread across disciplines. The authors conducted a narrative review of 56 studies to identify themes in existing research, synthesize the evidence base and identify gaps in understanding. They identify five themes: (1) Social‐normative organizational context, (2) Job‐related characteristics and work processes, (3) Person characteristics, (4) Designated non‐work time and well‐being, and (5) Empowerment/Enslavement Paradox. A conceptual model of voluntary ICT use is developed by integrating the identified themes with existing organizational research, outlining the relationships between the identified themes and voluntary ICT use. The discussion emphasizes the need for more conceptual clarity on voluntary ICT use and related constructs, and for the integration of different disciplines and methodological approaches to advance knowledge in the field. The authors further identify person‐centred research as a critical future avenue to explore different ICT user types. Additionally, more research into the mechanisms and moderating influences regarding voluntary ICT use and its outcomes is considered advisable to advance knowledge on the Empowerment/Enslavement Paradox and its potential resolution. The paper concludes with preliminary implications to inform practice, addressing the need for employers to provide control over voluntary ICT use and employees enacting this control. 相似文献
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The present article focuses on mentalization in the context of team supervision. First, we elaborate on mentalization “breakdown”. We describe the different prementalizing modes by referring to the example of a team supervision, and we explain when and how they are activated. Beyond the general, stress-related model of mentalization, we identify factors in the organizational context that may impact mentalization positively and negatively. Afterwards, we illustrate how mentalization can be used in (team) supervision and how the general approach of and interventions from mentalization-based therapy (MBT) may be translated in the context of team supervision. 相似文献
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Increasing prices of scholarly journals have been subject to fierce discussion for several decades. In this paper the authors integrate influence factors of journal prices analyzed in different previous studies in a unified regression model based on current data. Three different models are calculated. In the first model (overall market) the largest influence was found for the size of the journal. Additionally, the authors calculate separate regression models for STM (Scientific, Technical, Medical) vs. HSS (Humanities and Social Sciences) journals and for for-profit vs. not-for-profit journals. The first comparison found that the influence of the number of published articles is much lower for HSS journals. The comparison between for-profit and not-for-profit journals showed that the influence of the circulation of a journal on its price is higher in the for-profit segment. 相似文献