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51.
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Summary An extension of Barrett and Marshall's model expressing fecundability as a function of coital pattern is proposed. In particular, this extension includes the probability that the ovum remains alive. The extended model has been applied to Barrett and Marshall's data, a series of cycles for which basal body temperature curves and the date of coitus have been recorded. It was thus possible to estimate the daily probabilities of fertilization and, under certain assumptions, the proportion of lost ova. This proportion was estimated to be above 50 per cent, and increases with age. The increase of fecundability with frequency of intercourse is more moderate than that predicted by Barrett and Marshall's model. 相似文献
53.
Meyer Schwartz 《Journal of Social Work Education》2013,49(2):93-99
Financing Higher Education: Recommendations of the Carnegie Commission on Higher Education. Four volumes (see below). Berkeley, California, Carnegie Commission on Higher Education, 1968. The Economics of the Major Private Universities, William G. Bowen. 66 pages. $1.25 softbound. The Finance of Higher Education, Howard R. Bowen. $1.00 softbound. Alternative Methods of Federal Funding for Higher Education, Ronald A. Wolk. 261 pages. $2.00 softbound. Quality and Equality: New Levels of Federal Responsibility for Higher Education. A Special Report and Recommendations by the Commission. 54 pages. $1.00 softbound. 相似文献
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Internalizing and externalizing problems and parenting: Results from a Saudi Arabian sample
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Joseph A. Schwartz Mohammed Said Al-Ghamdi Ahmed Nezar Kobeisy Fathiyah H. Alqurashi Eric J. Connolly Kevin M. Beaver 《International Journal of Social Welfare》2017,26(3):263-275
Relatively few studies have attempted to identify factors that contribute to variation in parental behavior. The literature has revealed associations between both internal and external factors in the variation in parenting behaviors. In addition, the vast majority of the existing literature has focused almost exclusively on Western cultures (e.g., the USA). The current study addresses these limitations by examining direct and indirect pathways involving both internal and external sources of influence on parenting behaviors in a sample of adults from Saudi Arabia (N = 196). The employed statistical models revealed robust and consistent direct associations between the examined internalizing sources of influence (self-control and psychopathy) and parenting behaviors. Subsequent models revealed some evidence of mediation stemming from external sources of influence (namely, aggression). However, the resulting indirect effects were inconsistent, indicating that other, unmeasured mechanisms ultimately connect the examined internalizing problems and parenting behaviors. 相似文献
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Thomas Schwartz 《Theory and Decision》1970,1(1):89-106
Arrow proved the inconsistency of a set of reasonable looking conditions on a social decision rule. These conditions are stated and their rationale explained. It is argued that the blame for the inconsistency must lie with Arrow's Collective Rationality condition. Arrow's abstract problem is generalized and interpreted in terms of individual as well as collective decision-making. His conditions are revised so that (1) cardinal - even interpersonal - utility comparisons are allowed and (2) the Collective Rationality condition - which formulates the traditional conception of rational choice as maximizing choice - is weakened to its bare bones. The revised set of conditions is still inconsistent. Once again the culprit is the Collective Rationality condition, now drastically weakened: even the bare bones of Arrow's conception of rational choice as maximizing choice is untenable. An alternative conception is proposed. 相似文献
58.
Theodore M. Schwartz Stephen X. Doyle Robert A. Eberle 《International Journal of Value-Based Management》1998,11(3):237-251
In a new approach, which departs from traditional modes of management, highly effective leaders can use the powerful tool
of organizational myths as managerial interventions to inspire, indeed control, behavior and attitudes. The authors suggest
a way to analyze or ‘map’ myths, evaluate their potency, determine if the myths conflict with strategic organizational goals
and, where necessary, take action to build positive and supportive myths. The myths that have been used by effective organizations
are presented in support of the concepts that are advanced by the authors.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
59.
In this article we summarize work with poor, inner-city Hispanic and African American families conducted at the University of Miami Center for Family Studies. We elucidate ways in which this research program has paralleled the treatment development paradigm and has been responsive to changes in local demographics. Specific cultural issues pertaining to Hispanics and African Americans are discussed in light of treatment development and implementation. Future directions and challenges for working with poor, inner-city minority families are addressed. 相似文献
60.
From the earliest days of research on blockmodeling, one primary goal was to develop a method that would exploit the algebra of the social relations among individuals to describe the social structure of the group. This goal was reluctantly abandoned, however, because the presence of idiosyncratic relational ties in the data obscured the structure and no reliable method for identifying these ties existed. This paper presents such a method. We have found it useful to distinguish emotionally weak ties (Granovetter 1973), those with low intensity, from structurally weak ties, those that fail to conform to the pattern of ties that exist in and are reinforced by the social structure. The latter type of weak ties are the idiosyncratic ties that interfere with attempts to describe a social structure. This paper operationalizes the concept of structurally weak ties and presents an algebraic method for identifying them in sociometric data. This enables us to use the algebra of social relations to identify a blockmodel that describes the social structure of the group. 相似文献