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Substance use among college-age adults is of interest due to high levels of use and low levels of treatment access and engagement relative to other adults. Data collected from 1,972 clients in residential services were analyzed to investigate differences in use patterns, treatment outcomes, and other life area problems. Participants completed an Addiction Severity Index (ASI) and the University of Rhode Island Change Assessment (URICA) at baseline, and an ASI and Treatment Services Review at 1-month and 6-month postdischarge interviews. Almost a quarter (24.1%) of participants were college age (18–25 years old). They were more likely to be White and male, and less likely to complete treatment although they had a longer average length of stay. College-age adults improved on all outcome measures, and posttreatment service use shows significant difference between college-age and older participants. Implications for practice are discussed.  相似文献   
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The North American Free Trade Agreement (NAFTA) and the General Agreement on Tariffs and Trade (GATT) have focused attention on risk assessment of potential insect, weed, and animal pests and diseases of livestock. These risks have traditionally been addressed through quarantine protocols ranging from limits on the geographical areas from which a product may originate, postharvest disinfestation procedures like fumigation, and inspections at points of export and import, to outright bans. To ensure that plant and animal protection measures are not used as nontariff trade barriers, GATT and NAFTA require pest risk analysis (PRA) to support quarantine decisions. The increased emphasis on PRA has spurred multiple efforts at the national and international level to design frameworks for the conduct of these analyses. As approaches to pest risk analysis proliferate, and the importance of the analyses grows, concerns have arisen about the scientific and technical conduct of pest risk analysis. In January of 1997, the Harvard Center for Risk Analysis (HCRA) held an invitation-only workshop in Washington, D.C. to bring experts in risk analysis and pest characterization together to develop general principles for pest risk analysis. Workshop participants examined current frameworks for PRA, discussed strengths and weaknesses of the approaches, and formulated principles, based on years of experience with risk analysis in other setting and knowledge of the issues specific to analysis of pests. The principles developed highlight the both the similarities of pest risk analysis to other forms of risk analysis, and its unique attributes.  相似文献   
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The environment is both a setting for and a product of human interactions. Understanding the dynamic nature of human-environment interactions is critical for mitigating the impacts of human induced environmental change and understanding how the environment shapes social systems. Current research has focused on the reduced ability of many natural systems to provide ecosystem services and the subsequent impact on human well-being. Furthermore, there has been a proliferation of cases analyzing the impacts of payment programs designed to enhance ecosystem services. However, analyses that link environmental policies through to their ecological results are not common and methods to do so are not thoroughly developed. To better analyze these interactions, a theory or framework is necessary. This article presents a framework of social ecological complex adaptive systems (SECAS). The framework links structuration theory from social science with the theories of complex adaptive systems from ecology to provide an enhanced understanding of the human drivers and responses to environmental change. The framework is presented as a recursive process where social and ecological systems are both the medium for and product of social action and ecological disturbance. A case study of Costa Rica’s ecosystem service payment program is presented as a demonstration of empirical applicability. This framework is proposed as a method to evaluate payments for ecosystem services, conservation policies, urban ecosystems, and for land use change in general.  相似文献   
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In this article we show that there are two more or less distinct orientations toward the citizenship role — one which stresses traditional notions of patriotism and another which emphasises more critical, active participation in the political process. These two orientations seem central since how one rates the citizenship requirements relates to both self‐identification and perceptions of social power.

Our results shed light on national identity within a sample consisting largely of Afrikaans university students in South Africa and indicate that these students identify very strongly with South Africa.  相似文献   
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Integrative public leadership is a process of developing partnerships across organizational, sectoral and/or jurisdictional boundaries that create public value. This paper explores the concept in the context of the literature and illustrates some salient features of integrative public leadership through three cases involving extensive multi-sector collaboration in the western (Smoky Mountain) region of North Carolina. The cases are different in subject matter—sewer lines to a rural community, broadband infrastructure across a network of rural schools and colleges, and a major environmental preservation effort—but they all share some key elements. Leadership in each case is enacted through structure, process, and people. Boundary organizations provide a structural context for partnership development; boundary experiences and boundary objects serve to bridge differences and create a common purpose; and boundary spanners exhibit entrepreneurial qualities and leverage relationship capital in order to facilitate integration.  相似文献   
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In Russian, the statistically dominant order of the subject and the verb in the clause is SV. However, there are many environments in which VS orders also occur, not all of which have been noted in the scholarly literature. This paper outlines some models of Russian constituent order that have been put forward in both generative and functional frameworks, and it suggests how they may be modified to improve their adequacy. Its central claim is that an improved model of Russian clause organization would take the form (VS)Theme/(VS)Rheme. It offers analyses of a large set of data collected from literary and academic writing in support of its claim, in so doing presenting a more or less comprehensive overview of environments in which clauses containing post-verbal subjects are found in written Russian.  相似文献   
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This study evaluated several statistical models for estimating treatment effects in a randomized, longitudinal experiment comparing assertive community treatment (ACT) versus brokered case management (BCM). In addition, mediator and moderator analyses were conducted. The ACT clients had improved outcomes in terms of housing and psychiatric symptoms than BCM clients. Case management housing assistance and financial assistance partially mediated housing outcomes. No reliable mediators were found for psychiatric symptoms, and no reliable moderators were found for either housing or psychiatric symptoms. The study also made several important methodological advances in the analysis of longitudinal data in randomized experiments.  相似文献   
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