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   993篇
  免费   27篇
管理学   107篇
民族学   5篇
人口学   84篇
丛书文集   1篇
理论方法论   118篇
综合类   4篇
社会学   623篇
统计学   78篇
  2020年   21篇
  2019年   26篇
  2018年   22篇
  2017年   30篇
  2016年   20篇
  2015年   20篇
  2014年   24篇
  2013年   173篇
  2012年   30篇
  2011年   38篇
  2010年   9篇
  2009年   24篇
  2008年   22篇
  2007年   42篇
  2006年   44篇
  2005年   42篇
  2004年   30篇
  2003年   28篇
  2002年   30篇
  2001年   22篇
  2000年   12篇
  1999年   20篇
  1998年   20篇
  1997年   11篇
  1996年   9篇
  1995年   14篇
  1994年   12篇
  1993年   17篇
  1992年   11篇
  1991年   7篇
  1990年   19篇
  1989年   7篇
  1988年   10篇
  1987年   9篇
  1986年   9篇
  1985年   9篇
  1984年   13篇
  1983年   9篇
  1982年   11篇
  1981年   11篇
  1980年   9篇
  1979年   7篇
  1978年   10篇
  1977年   14篇
  1976年   7篇
  1975年   7篇
  1974年   7篇
  1973年   4篇
  1970年   5篇
  1967年   3篇
排序方式: 共有1020条查询结果,搜索用时 15 毫秒
71.
The Adoption and Safe Families Act of 1997 (ASFA) mandates policies designed to increase the frequency and speed with which permanency is achieved for children in the child welfare system. ASFA's focus is on child safety, permanency, and well-being. The expectation that parents correct neglectful conditions within specified time frames places an increased ethical responsibility on child welfare staff. Carrying out this responsibility requires vigorous and innovative approaches to engaging and working with neglectful families. Drawing on a well-established conceptual framework for understanding the determinants of effective parenting, the authors derive the ENGAGE (Engagement, Needs assessment, Goal setting, Assessment of progress, Goal achievement, Ending work) model for achieving permanency within the policy structure. The model incorporates creative client engagement, assessment of family needs, mutual goal setting, the goal achievement process, termination, and aftercare.  相似文献   
72.
73.
Although graduate physical therapy students are taught the principles of fitness for incorporation into their professional lives, they have difficulty finding the time to implement these principles during graduate school. The authors studied 3 successive classes of graduate physical therapy students at the beginning and ending of their respective programs. They found that the women's percentages of body fat were significantly greater over the period of the study. The men's lower extremity strength decreased at the slower speeds (60 degrees/second), and the women showed increased strength at the higher speeds (180 and 240 degrees/second, respectively). Male grip strength significantly increased over the period of the study. To decrease students' percentages of body fat and increase their strength, the authors asserted that physical therapy students should be allowed more time to participate in fitness activities during their graduate school years.  相似文献   
74.
The late 1960s through the early 1970s was a time of profound social change both in American society and in sociology. Sociological attention shifted from social pathology to deviant subcultures and to labeling processes, shifting again by the 1990s to the study of social control. Many ethnographic studies of homosexuality were undertaken in the 1960s and 1970s in the tradition of labeling and stigma, including Laud Humphreys' Tearoom Trade (1970) and my Identity and Community in the Gay World (Warren 1974). Male ethnographers in particular were often stigmatized along with the deviants they studied, while the women (including me) were sometimes discouraged from doing graduate-level sociology at all. Thirty years later, the terrains of gender, sexuality and stigma have changed, yet pockets of pro-stigma resistance remain. Even in the 2000s, the stigma of homosexuality has not entirely disappeared. And, above all, the essentializing categories of homosexual, bisexual and heterosexual remain firmly entrenched in public discourse, sociological analysis, homophobia and gay activism.  相似文献   
75.
A Bayesian approach, implemented using Markov Chain Monte Carlo (MCMC) analysis, was applied with a physiologically‐based pharmacokinetic (PBPK) model of methylmercury (MeHg) to evaluate the variability of MeHg exposure in women of childbearing age in the U.S. population. The analysis made use of the newly available National Health and Nutrition Survey (NHANES) blood and hair mercury concentration data for women of age 16–49 years (sample size, 1,582). Bayesian analysis was performed to estimate the population variability in MeHg exposure (daily ingestion rate) implied by the variation in blood and hair concentrations of mercury in the NHANES database. The measured variability in the NHANES blood and hair data represents the result of a process that includes interindividual variation in exposure to MeHg and interindividual variation in the pharmacokinetics (distribution, clearance) of MeHg. The PBPK model includes a number of pharmacokinetic parameters (e.g., tissue volumes, partition coefficients, rate constants for metabolism and elimination) that can vary from individual to individual within the subpopulation of interest. Using MCMC analysis, it was possible to combine prior distributions of the PBPK model parameters with the NHANES blood and hair data, as well as with kinetic data from controlled human exposures to MeHg, to derive posterior distributions that refine the estimates of both the population exposure distribution and the pharmacokinetic parameters. In general, based on the populations surveyed by NHANES, the results of the MCMC analysis indicate that a small fraction, less than 1%, of the U.S. population of women of childbearing age may have mercury exposures greater than the EPA RfD for MeHg of 0.1 μg/kgg/day, and that there are few, if any, exposures greater than the ATSDR MRL of 0.3 μgg/kgg/day. The analysis also indicates that typical exposures may be greater than previously estimated from food consumption surveys, but that the variability in exposure within the population of U.S. women of childbearing age may be less than previously assumed.  相似文献   
76.
A screening approach is developed for volatile organic compounds (VOCs) to estimate exposures that correspond to levels measured in fluids and/or tissues in human biomonitoring studies. The approach makes use of a generic physiologically-based pharmacokinetic (PBPK) model coupled with exposure pattern characterization, Monte Carlo analysis, and quantitative structure property relationships (QSPRs). QSPRs are used for VOCs with minimal data to develop chemical-specific parameters needed for the PBPK model. The PBPK model is capable of simulating VOC kinetics following multiple routes of exposure, such as oral exposure via water ingestion and inhalation exposure during shower events. Using published human biomonitoring data of trichloroethylene (TCE), the generic model is evaluated to determine how well it estimates TCE concentrations in blood based on the known drinking water concentrations. In addition, Monte Carlo analysis is conducted to characterize the impact of the following factors: (1) uncertainties in the QSPR-estimated chemical-specific parameters; (2) variability in physiological parameters; and (3) variability in exposure patterns. The results indicate that uncertainty in chemical-specific parameters makes only a minor contribution to the overall variability and uncertainty in the predicted TCE concentrations in blood. The model is used in a reverse dosimetry approach to derive estimates of TCE concentrations in drinking water based on given measurements of TCE in blood, for comparison to the U.S. EPA's Maximum Contaminant Level in drinking water. This example demonstrates how a reverse dosimetry approach can be used to facilitate interpretation of human biomonitoring data in a health risk context by deriving external exposures that are consistent with a biomonitoring data set, thereby permitting comparison with health-based exposure guidelines.  相似文献   
77.
This work upon which this article is based has been designed to identify only the most significant facets of future research and development (R & D) and planning in terms of their potential impact on the economic aspect of society. In order to see the impact in the United States, some contrasts have been drawn against the current and future R & D activities of other countries.

In looking for overt directions in environmental developments, it is impossible to escape the realization that no other activity has the potential to affect the lives of all men to the extent of science and technology. Hopefully, by dealing briefly with many facets of R & D, the great scope of this activity may become more evident.

The first part of this article provides the background against which future trends in R & D are examined. Next, separate considerations of the impact that R & D has on the economic elements of the environment are examined. These discussions form the basis for the hypothesis that R & D planning and decision making must not only consider the organizational viewpoint, but also must consider the environment. In this light, a hypothetical R & D planning model is presented in the last section which attempts to direct the selection of the ends in R & D planning toward some socially responsible goal.  相似文献   

78.
Collecting loss     
ABSTRACT

‘Collecting Loss’ develops themes from Pleasures Taken (Mavor, Duke University Press, 1995) with an emphasis on the fetishization of photographs and old clothes (exemplified, on the one hand, in Elin O'Hara Slavick's own girlhood dresses that she has stitched with haunting memories of her childhood, and on the other hand in the lush photographs taken by Sally Mann and the Victorian photographer Clementina Hawarden). As Christian Boltanski has written: ‘What they [clothing and photographs] have in common is that they are simultaneously presence and absence. They are both an object and a souvenir of a subject, exactly as a cadaver is both an object and a souvenir of a subject.’ Reading an old photographic album made by her own grandmother against other maternal collections of plenitude (whether they be old clothes or photographs or domestic bric-a-brac), Mavor reveals how such accumulated goods are made to fill in for the pangs of loss: lost childhoods, lost family histories, lost memories, lost friends. Mixing corporeality and critical theory, Mavor engages with Emily Apter's notion of ‘maternal collectomania’ as a site of provocative meanings worthy of placement alongside more conventional discourses on visual representation and collecting.  相似文献   
79.
This paper develops a Gender Equality Index (GEI) that is modelled in its thinking and implementation on the Consumer Price Index (CPI). The GEI was computed using annual Ontario data on seven socioeconomic indicators for the years 1975 to 1984. The analysis supports the following conclusions: (1) that it is possible to indentify a subset of indicators that have face validity as measures of relative gender equality; (2) that factor analysis is a useful means for evaluating the construct validity of gender equality; (3) that the resulting GEI reveals a strong upward trend toward gender equality in the latter half of the 1970's and the early 1980's and (4) that this trend has flattened in 1984.  相似文献   
80.
This investigation examines the sociocultural influences on risk of first sex among a representative sample of Hispanic (primarily of Mexican origin) teens living in Los Angeles County. Teen acculturation (measured as language of interview) moderates the effects of gender on risk of sex, with less acculturated teens exhibiting the greatest gender difference. Teens living with both biological parents have significantly lower risk of sex and the effect of family acculturation (measured as generational status) operates through teens' language of interview. Neither measure of parent‐youth relationship (socioemotional support, parental control) is significant. Hispanic teens living in low‐density Hispanic neighborhoods have significantly higher risk of sex than do teens living in neighborhoods with higher levels of ambient hazards. The results highlight the importance of characterizing sociocultural influences at multiple levels of aggregation.  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