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Estimates of extreme winds are essential for engineering design, but in preparing such estimates major statistical issues are encountered. In this case study, the analysts were provided with hourly readings on wind speed, wind direction, and barometric pressure at five Canadian stations for observation periods ranging over several recent decades. Their assignment was to calculate point and interval estimates of 10-, 20-, 50-, and 100-year return values (i.e., upper fractiles) for the wind speeds at these stations. 相似文献
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Past research has documented the fact that status characteristics organize group interaction. Freese and Cohen (1973) specified a condition under which a performance characteristic would eliminate the effect of a differentiating diffuse status characteristic. The present research extends the Freese-Cohen theory to specify a condition under which a differentiating diffuse status characteristic will eliminate the effect of a performance characteristic. Predictions derived from the formulation are (a) in situations where actors are differentiated by a diffuse status characteristic and a totally inconsistent performance characteristic, influence rates will be a function only of diffuse status and (b) it is the strength (0) of a totally inconsistent performance characteristic, rather than the number of traits comprising the characteristic, that determines its effect. These predictions are contrasted with those of other expectation states formulations (i.e., Berger et al., 1977). Laboratory experiments generally support our formulation while providing some disconfirming evidence for the other formulations. 相似文献
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Jane D. Gray Christy A. Cutler Ms. Janet G. Dean C. Henry Kempe 《The Journal of social issues》1979,35(2):127-139
A high-risk population was successfully identified by the use of perinatal screening procedures. These children encountered significantly different parenting practices than the low-risk "control" group. There were also significant differences between "High-Risk" and "Low-Risk" families on issues concerning social adjustment and mother/infant attachment. Five children in a "High-Risk Nonintervene" group required hospitalization for serious injuries thought to be secondary to abnormal parenting practices. There were no such hospitalizations in either a High Risk Intervene group or a Low Risk group. Labordelivery observations, and postpartum interviews and observations provided the most accurate predictive information; prenatal interviews and questionnaires did not add significantly. Perinatal assessment and simple intervention with families at high risk for abnormal parenting practices significantly improves the infants' chances for escaping serious hospitalized physical injury. 相似文献
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Successful joint ventures in Science Parks 总被引:2,自引:0,他引:2
D. Jane Bower 《Long Range Planning》1993,26(6):114-120
Technology-based firms are looking for ways of minimizing the increasing risks and costs of developing new products and processes. Acquisition of new technology through a collaborative development is one way which is finding favour. Universities, their associated Science Parks and spinout companies offer opportunities for such partnerships which are growing in importance. The services available by this route to large companies are attracting a substantial international clientele. 相似文献
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Jane Sandall 《Gender, Work and Organization》1996,3(4):215-226
Over the last decade, an increasing amount of research has examined the relationship between gender and professionalization using female professional projects to illustrate how the generic notion of a profession has been a gendered one. This paper develops Witz's (1990) theory of professional strategies in female-dominated occupations particularly regarding midwives in Britain in the twentieth century and suggests that an important dimension that also needs to be critically examined in midwifery history is the interaction of gender and social class within midwifery. Furthermore it documents the traditional emphasis in midwifery on the single woman's career path. This historical analysis has resonance today as midwifery in Britain is undergoing a renaissance. The role of the midwife and the current organization of the maternity services are being reviewed with the intention of providing increased choice and control over the reproductive process for women and increased continuity of care with a midwife. These changes are viewed as midwives' new professional project and the implications for midwives and women discussed. The aim of this paper is to explore the explanatory power of these approaches to current developments in maternity care and by drawing historical parallels, consider the impact that this professionalizing strategy may have for those who are excluded from this process of ‘dual closure’. Furthermore, this paper asks whether this new way of working empowers midwives, women, both or neither? 相似文献