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排序方式: 共有109条查询结果,搜索用时 15 毫秒
71.
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This paper suggests that the literature on organization control could benefit from more attention to 'disconnections', particularly those that take the form of extrusions and effacements from organization processes. Pointing out that current organization researchers depend almost exclusively on 'connections' for their theorizing on control, the paper illustrates the importance of disconnections in the form of gaps, breaks and absences in three field studies. The argument of the paper is that control is an effect that is enacted in practice by a distribution of connections alongside disconnections.  相似文献   
73.
Coronary artery calcium is a marker of coronary artery disease and measures the progression of atherosclerosis. It is measured by electron beam computed tomography, and the measured amount of coronary artery calcium is highly skewed to the right and left censored. The distribution of coronary artery calcium appears to be Weibull. We propose a Weibull regression model and we analyze the data using these techniques. Our analysis is based on data from the Spokane Heart Study, which is a cohort of about a thousand subjects that are assessed every two years for coronary artery calcium and risk factors of coronary artery disease. The major focus of the heart study is to determine the natural history of atherosclerosis in its early phase, and we analyze the data as a cross-sectional study with 859 subjects. We would also like to highlight the use of Weibull regression techniques in situations like this, where we have extreme right skewed data. Our main emphasis will be on examining the effect of the traditional risk factors of age, gender, lipid profile (cholesterol and HDL), patient history of lipid abnormality, hypertension, and smoking, and other family history risks on coronary artery calcium. We found that the most important factors influencing the disease were age, sex, and patient history of smoking and lipid abnormality.  相似文献   
74.
This investigation examines an approximation to the poly-t distribution, which often occurs in the Bayesian analysis of a linear model. The approximation allows one to compute the mean vector and dispersion matrix of any k/0 multivariate poly-t distribution in such a way that only univariate and bivariate numerical integrations are required. A numerical study depicts the advantages and disadvantages of the approximation.  相似文献   
75.
This study generalizes the work of chin choy and Broemeling (1980) who investigated the change in the regression parameters of univariate linear models.

The marginal posterior distributions of the change point, the regression matrices,and the precision matrix are found with the use of a proper multivariate normal-Wishart distribution for the parameters of the model.

A numerical study is undertaken in order to gain some insight into the effect that changes in sample size and certain parameter values have on these marginal posterior distributions.  相似文献   
76.
The Data Protection Act 1998 and Research Governance Frameworkfor Health and Social Care (Department of Health, 2003a) havebrought consideration of ethical issues in the conduct of researchinto sharper focus. This paper, based primarily on the authors’experiences of conducting research on children in need and outcomesfor vulnerable children, examines the impact these changes havehad on the research process. The difficulties experienced byresearchers in gaining access to research participants in orderto develop evidence-based policy and practice are explored.Finally, the paper outlines some practical steps that can betaken to facilitate the effective conduct of research.  相似文献   
77.
Abstract

The social work profession has long struggled to find fair and effective ways of selecting students into their education programs. A psychometric test battery, gathered together under the title “Personal Qualities Assessment” (PQA) has been developed at the University of Newcastle to identify a range of qualities in aspiring health professionals. Two of its components were used to determine whether there was a relationship between scores obtained by social work students in these tests and scores achieved in an empathic listening and critical review hurdle assessment prior to the first field placement. The results showed that social work students who were moderately empathic, not narcissistic, and moderately libertarian in their moral orientation performed better on the assessment than students who were less empathic, more narcissistic, or extreme in their moral orientation. These results suggest that measurement of these qualities could be useful in selecting the most suitable individuals for social work programs.  相似文献   
78.
Homeless young women experience high levels of stress, challenges to mental health, substance use and abuse, and a lack of housing or of secure housing. This article explores one of the findings from a longitudinal qualitative study designed to follow homeless young women for a 2-year period as they make efforts to transition out of homelessness. Our objective was to determine the assets used by these young women as they survived on the street and to transition out of homelessness. The authors found that one of the primary reasons discussed for leaving homelessness was becoming pregnant and having a baby. However, most of the mothers reported increasing levels of stress as the baby became a toddler. They described themselves as using “soft drugs” as a mode of coping with this stress.  相似文献   
79.
Across the public sector there is concern that service uptake is inequitably distributed by socio‐economic circumstances and that public provision exacerbates the existence of inequalities either because services are not allocated by need or because of differential patterns of uptake between the most and least affluent groups. A concept that offers potential to understand access and utilization is ‘candidacy’ which has been used to explain access to, and utilization of, healthcare. The concept suggests that an individual's identification of his or her ‘candidacy’ for health services is structurally, culturally, organizationally and professionally constructed, and helps to explain why those in deprived circumstances make less use of services than the more affluent. In this article we assess the fit of candidacy to other public services using a Critical Interpretive Synthesis of three case studies literatures relating to: domestic abuse, higher education and environmental services. We find high levels of congruence between ‘candidacy’ and the sampled literatures on access/utilization of services. We find, however, that the concept needs to be refined. In particular, we distinguish between micro, meso and macro factors that play into the identification, sustaining and resolution of candidacy, and demonstrate the plural nature of candidacies. We argue that this refined model of candidacy should be tested empirically beyond and within health. More specifically, in the current economic context, we suggest that it becomes imperative to better understand how access to public services is influenced by multiple factors including changing discourses of deservedness and fairness, and by stringent reductions in the public purse.  相似文献   
80.
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