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Barnacle geese ( Branta leucopsis ) make annual migrations between breeding colonies in northern Europe and Eurasia to wintering grounds in Holland. During the migration, they sojourn for several weeks in five areas on the northern coast of Germany. Observers traverse these areas during the course of studying the flocks. Previous belief was that there was little exchange of birds among the five areas; however, some banded birds were observed in more than one area indicating that some movement takes place. In this presentation, we estimate the movement rates among the areas using open- and closed-population models. 相似文献
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Barbara E. Joslyn 《Clinical Social Work Journal》1982,10(1):39-51
This article suggests that it is important for family therapists to be attuned to the struggles families are experiencing in relation to their changing sex role mores. Traditional ideas about what is feminine and masculine still exist while new realities with new values are emerging. Although one would expect the family therapy literature to be discussing and clarifying the implications of sex role shifts for individuals within the family and for the family as a whole, it has been surprisingly silent. This article reviews the concept of sex roles and discusses it from the perspective of the dichotomization of gender. Object relations theory is suggested as a framework by which sex role differentiation and particularly its more polarized aspect can be understood.This article was submitted in partial fulfillment of the requirements for the certificate in Family Therapy, Smith College School for Social Work, Northampton, MA, 1979. 相似文献
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This article presents a multistage migration framework to broaden the lens through which child welfare personnel can view immigrant and refugee families and their children. By better understanding the family's experiences in both emigration and immigration, including reasons for leaving their home country, experiences in transit, and reception and resettlement experiences in the United States, child welfare personnel are better equipped to assess their needs and provide effective prevention, protection, permanency, and family preservation services. Case examples illustrating the application of the framework and guidelines for program and practice are included. 相似文献
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Barbara S. Janowitz 《Demography》1976,13(2):189-198
The impact of education on family size is divided into a direct effect (holding labor force participation and age at marriage constant) and an indirect effect (varying labor force participation and age at marriage). The results suggest that (1) the indirect effect of education is greater at higher levels of the wife's education, (2) the direct effect is greater at lower levels of education in most cases, (3) the indirect effects do not vary systematically with husband's education, (4) but the direct effect does vary systematically with husband's education if the education of the wife is low but not if wife's education is high. 相似文献
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