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61.
Clazien J. de Vos Helmut W. Saatkamp Mirjam Nielen Ruud B. M. Huirne 《Risk analysis》2006,26(5):1311-1322
Introduction of classical swine fever virus (CSFV) is a continuing threat to the pig production sector in the European Union. A scenario tree model was developed to obtain more insight into the main risk factors determining the probability of CSFV introduction (P(CSFV)). As this model contains many uncertain input parameters, sensitivity analysis was used to indicate which of these parameters influence model results most. Group screening combined with the statistical techniques of design of experiments and meta-modeling was applied to detect the most important uncertain input parameters among a total of 257 parameters. The response variable chosen was the annual P(CSFV) into the Netherlands. Only 128 scenario calculations were needed to specify the final meta-model. A consecutive one-at-a-time sensitivity analysis was performed with the main effects of this meta-model to explore their impact on the ranking of risk factors contributing most to the annual P(CSFV). The results indicated that model outcome is most sensitive to the uncertain input parameters concerning the expected number of classical swine fever epidemics in Germany, Belgium, and the United Kingdom and the probability that CSFV survives in an empty livestock truck traveling over a distance of 0-900 km. 相似文献
62.
Helmut Hirtenlehner 《?sterreichische Zeitschrift für Soziologie》2004,29(2):95-110
The current development of the social sector is marked by a transformation of basic conditions, which is expressed in terms of an increasing cost pressure and an enhancement of status and a structural change of voluntary work. This paper addresses the question which patterns of mutual perception professional and voluntary social workers develop under such circumstances. Considering the Austrian probation service as example the social climate between professional and voluntary social workers is analysed. The main finding is that the mentioned transformations do not necessarily generate a conflict between vocational and non-vocational staff. Although the tasks of professional and voluntary probation officers are partially overlapping they view themselves mutually as enrichment and supplement and not as rivals. The extent of individual experiences of acceptance and appreciation may be identified as a background factor for the cooperative climate. Self-experienced acceptance and appreciation inhibits negative attitudes towards the other group. 相似文献
63.
Helmut Anheier Martin Knapp 《Voluntas: International Journal of Voluntary and Nonprofit Organizations》1990,1(1):1-12
Helmut Anheier is Assistant Professor of Sociology at Rutgers University, New Brunswick, New Jersey, USA 相似文献
64.
Prof. Dr. Helmut Klages Dr. Thomas Gensicke 《KZfSS K?lner Zeitschrift für Soziologie und Sozialpsychologie》2006,58(2):332-351
Der Beitrag knüpft an den Kommentar zu einem Artikel von Sigrid Ro?teutscher durch Helmut Thome an (vgl. der Beitrag „‚Wertesynthese’:
Ein unsinniges Konzept?” in KZfSS 57: 333–341). Er setzt der Grundsatzkritik Sigrid Ro?teutschers an der „Wertesynthese” (vgl.
die Beitr?ge „Von Realisten und Konformisten — Wider die Theorie der Wertesynthese” in KZfSS 56: 407–432 und „Kein unsinniges
Konzept, sondern traurige Realit?t” in KZfSS 57: 543–549) eine Beschreibung der Entstehungsgeschichte des Konzeptes der Wertesynthese
und ihrer theoretischen Grundlagen entgegen. Weiterhin erfolgt eine Darstellung des aktuellen Erkenntnisstandes zur Wertesynthese.
Es soll gezeigt werden, dass Konzept und Realit?t der „Wertesynthese” eine aussichtsreiche Forschungs-und Gesellschaftsperspektive
er?ffnen. 相似文献
65.
A decision problem is by convention characterized by its outcome matrix and by a subsequent utility evaluation. In trying to set up an outcome matrix based on wealth values it may occur that due to ambiguities inherent in the decision problem it is not clear which standard of value (or numéraire) should be used in order to measure wealth. A typical example of this kind is Stützel's so called Onassis Paradox. We show that problems of this kind can be solved within the conventional framework of decision theory. The analysis proceeds in two steps. First, state-dependent utility functions are derived; second, a model for evaluating these utility functions is presented. 相似文献
66.
67.
68.
Structural analysis and strategic research design: Studying politicized interorganizational networks
Helmut K. Anheier 《Sociological Forum》1987,2(3):563-582
Network analysis and structural sociology have given relatively little attention to questions of research design and data collection. This paper discusses the substantive implications of conducting structural analysis with more intensive work on research design and data collection. Based on evidence from a case study of a politicized social structure, the major features of strategic research design are presented in a discussion of cognitive and behavioral data, types of ties, multiplexity, and access restrictions. 相似文献
69.
Helmut K. Anheier Martin Knapp 《Voluntas: International Journal of Voluntary and Nonprofit Organizations》1991,2(1):1-2
Helmut Anheier is Assistant Professor of Sociology at Rutgers University, New Brunswick, New Jersey, and Research Associate at the Institute for Policy Studies, The Johns Hopkins University, Baltimore, Maryland, USA. 相似文献
70.