首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   275篇
  免费   7篇
管理学   34篇
人口学   19篇
理论方法论   29篇
综合类   4篇
社会学   173篇
统计学   23篇
  2023年   4篇
  2022年   1篇
  2021年   2篇
  2020年   3篇
  2019年   13篇
  2018年   6篇
  2017年   15篇
  2016年   9篇
  2015年   7篇
  2014年   14篇
  2013年   35篇
  2012年   10篇
  2011年   10篇
  2010年   9篇
  2009年   8篇
  2008年   12篇
  2007年   14篇
  2006年   12篇
  2005年   13篇
  2004年   6篇
  2003年   2篇
  2002年   11篇
  2001年   8篇
  2000年   4篇
  1999年   4篇
  1998年   3篇
  1997年   1篇
  1996年   3篇
  1995年   2篇
  1994年   4篇
  1993年   4篇
  1991年   1篇
  1990年   2篇
  1989年   4篇
  1988年   4篇
  1985年   1篇
  1984年   2篇
  1983年   1篇
  1982年   6篇
  1981年   1篇
  1980年   2篇
  1979年   1篇
  1977年   3篇
  1976年   1篇
  1973年   1篇
  1967年   1篇
  1966年   2篇
排序方式: 共有282条查询结果,搜索用时 0 毫秒
11.
Early in the 30-year HIV/AIDS pandemic in Sub-Saharan Africa, epidemiological studies identified formal education attainment as a risk factor: educated Sub-Saharan Africans had a higher risk of contracting HIV/AIDS than their less educated peers. Later demographic research reported that by the mid-1990s the education effect had reversed, and education began to function as a social vaccine. Recent counter-evidence finds a curvilinear pattern, with the association between educational attainment and HIV/AIDS infection changing from positive to negative across the education gradient. To reconcile these inconsistent conclusions, a hypothesis is developed and tested that education at early stages functioned as a risk factor and later functioned (and continues to function) as a social vaccine. We reason that this shift in the direction of the education effect was concurrent with changes in the public health environment in SSA that early on heightened material benefits from educational attainment but later heightened cognitive benefits from schooling. Using the 2003/2004 Demographic Health Surveys from four Sub-Saharan African countries (Cameroon, Ghana, Kenya and Tanzania), we tested this hypothesis (differential effects of schooling) using non-linear regression analysis (probit), identifying the different public health periods and controlling for confounding factors. The results support the hypothesis that the education effect shifted historically in the HIV/AIDS pandemic in SSA as we hypothesized.  相似文献   
12.
Non-hormonal approaches to premenstrual syndrome (PMS) treatment such as selective serotonin reuptake inhibitors are by no means effective for all women and frequently we must resort to endocrine therapy. During many of the hormonal approaches, PMS-like symptoms can be introduced or re-introduced during the necessary cyclical or continuous progestogen component of the therapy. This is seen with combined oral contraception, progestogen only contraception, progestogen therapy for heavy menstrual bleeding and endometriosis, sequential hormone replacement therapy and any therapeutic strategy for premenstrual syndrome where it is necessary to provide endometrial protection, including estrogen suppression of ovulation or add-back during gonadotrophin releasing hormone suppression. The link to progestogen is very often missed by health professionals. When the pattern of symptoms mimics the cyclicity of PMS, it is termed progestogen-induced premenstrual disorder. The need to use progestogen to protect the endometrium from the proliferative actions of estrogen can pose insurmountable difficulties in managing premenstrual disorders. In the absence of any really useful evidence, nearly all practice in this area depends on clinician experience. We cannot afford to wait for adequate research evidence to be produced - it never will - and so we must rely on empirical findings, clinical experience, theoretical strategies and common sense.  相似文献   
13.
Sex offenders and sex crimes provoke a great deal of anxiety in our society, and over the past decade, lawmakers have passed a variety of social policies designed to protect the public from sexual victimization. The purpose of this study was to examine public perceptions about sex offenders and community protection policies. Data were obtained from a sample of 193 residents in Melbourne, Florida. It was hypothesized that the public holds some inaccurate beliefs about sex offenders, and that there is strong public support for community protection policies. It was found that community members believe that sex offenders have very high recidivism rates, view sex offenders as a homogeneous group with regard to risk, and are skeptical about the benefits of sex offender treatment. The hypothesis that public perceptions contradict empirical research was supported. Community members were overwhelmingly in favor of public disclosure of information about registered sex offenders, although they did not express as much support for residence restrictions. Implications for public policy, and for the media's role in shaping public perceptions, are discussed.  相似文献   
14.
Constructive-developmental theory is a stage theory of adult development that focuses on the growth and elaboration of a person's ways of understanding the self and the world. In this article we review how the constructive-developmental frameworks of Kegan [Kegan, R. (1982). The evolving self: Problem and process in human development. Cambridge, MA: Harvard University Press], Torbert [Torbert, W. R. (1987). Managing the corporate dream: Restructuring for long-term success. Homewood, IL: Dow Jones-Irwin.], and Kohlberg [Kohlberg, L. (1969). Stage and sequence: The cognitive developmental approach to socialization. In D. Goslin (Ed.), Handbook of socialization: Theory and research. New York: Rand McNally] have been applied in the theoretical and empirical literature on leadership and management. Although the literature has produced a number of propositions, the notion that a leader's order of development should impact his or her leadership effectiveness or managerial performance has generated the most research. We found mixed support for this proposition as well as a number of limitations in the research in general. To have a greater impact on the leadership field, constructive-developmental theory needs to generate more robust research, to link more clearly with on-going streams of leadership research, and to explore the contribution of aspects of the theory beyond individual order of development.  相似文献   
15.
Operations management methods have been applied profitably to a wide range of technology portfolio management problems, but have been slow to be adopted by governments and policy makers. We develop a framework that allows us to apply such techniques to a large and important public policy problem: energy technology R&D portfolio management under climate change. We apply a multi‐model approach, implementing probabilistic data derived from expert elicitations into a novel stochastic programming version of a dynamic integrated assessment model. We note that while the unifying framework we present can be applied to a range of models and data sets, the specific results depend on the data and assumptions used and therefore may not be generalizable. Nevertheless, the results are suggestive, and we find that the optimal technology portfolio for the set of projects considered is fairly robust to different specifications of climate uncertainty, to different policy environments, and to assumptions about the opportunity cost of investing. We also conclude that policy makers would do better to over‐invest in R&D rather than under‐invest. Finally, we show that R&D can play different roles in different types of policy environments, sometimes leading primarily to cost reduction, other times leading to better environmental outcomes.  相似文献   
16.
Cumulative trauma disorder is a widely accepted construct that refers to illnesses of the soft tissues which supposedly occur due to biomechanical workplace risk factors. However, is the term "cumulative trauma disorder" a useful term for describing the illness attributed to it? This paper will scrutinize this question by specifying the meaning of "cumulative trauma disorder" and examining this construct to see if the belief in it is justified, and if this belief is leading to the elucidation of the phenomenon it is purporting to notate. Anomalous findings will be identified and used to help evaluate the accuracy of the belief system currently surrounding the term. Finally the ability of the construct "cumulative trauma disorder" to provide an adequate foundation for research in this area will be explored. A model of alternate pathomechanisms for this illness is advanced to provide a method of studying the disorders associated with the term.  相似文献   
17.
All family members interviewed suffered from chronic posttraumatic stress disorder 5 or more years after an infant kidnapping. Psychiatric nurses should routinely assess for secondary victimization related to any type of traumatic stressor. Nurses should refer parents and families to materials available from the National Center for Missing and Exploited Children (NCMEC) (http://www.missingkids.com/).  相似文献   
18.
Siblings are often not included in treatment programs for children who have been sexually abused. This article describes the necessity of including siblings in the treatment of victims of child sexual abuse. Including siblings in treatment permits families to realize the maximum benefits of therapy for the victim as well as each family member. Theoretical and practical reasons to include siblings in treatment are discussed (i.e., preventing future abuse, providing support for siblings, teaching siblings to refrain from victim-blaming). Case examples using a particular intervention approach at The Family Learning Program and results of client satisfaction surveys are described.  相似文献   
19.
Forty-eight of 52 (92%) agencies contracted with the New York City Administration for Children's Services (ACS) responded to a survey about problematic sexualized behaviors (PSB) of children in different levels of care within the child welfare system. Results revealed that almost all agencies reported PSB within their foster boarding home and residential treatment centers. A majority of agencies perceived PSB to be a significant problem for which staff and families were not sufficiently trained. These findings highlight many avenues for advocacy, clinical intervention, and staff development.  相似文献   
20.
Results from analysis of 227,771 discharge abstracts from 68 short-term, acute-care hospitals and from interviews with a stratified random selection of 24 of the 68 chief executives of these hospitals demonstrate that institutions perceive implementation of DRGs as fiscally constraining, especially in light of other resource-constraining conditions (an increase in unemployment resulting in fewer people with hospitalization insurance, in addition to severe cuts in Medicaid rolls and budget). Hospitals responded to DRGs by decreasing the use of affected resources or services available to the hospitalized Medicare patient. In order to survive a more economically stringent marketplace, hospitals no longer protected the traditional core within the Medicare inpatient market. They opted instead to change practices and products at the unregulated margins of the DRG system.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号