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   1349篇
  免费   109篇
管理学   71篇
民族学   15篇
人口学   132篇
丛书文集   7篇
理论方法论   181篇
综合类   8篇
社会学   972篇
统计学   72篇
  2024年   3篇
  2023年   32篇
  2022年   13篇
  2021年   16篇
  2020年   60篇
  2019年   75篇
  2018年   95篇
  2017年   106篇
  2016年   81篇
  2015年   73篇
  2014年   68篇
  2013年   240篇
  2012年   81篇
  2011年   70篇
  2010年   38篇
  2009年   47篇
  2008年   51篇
  2007年   51篇
  2006年   42篇
  2005年   36篇
  2004年   25篇
  2003年   30篇
  2002年   29篇
  2001年   21篇
  2000年   12篇
  1999年   12篇
  1998年   6篇
  1997年   6篇
  1996年   3篇
  1995年   4篇
  1994年   3篇
  1993年   8篇
  1992年   3篇
  1991年   2篇
  1990年   1篇
  1989年   2篇
  1987年   4篇
  1986年   1篇
  1985年   2篇
  1982年   2篇
  1980年   1篇
  1979年   1篇
  1968年   1篇
  1967年   1篇
排序方式: 共有1458条查询结果,搜索用时 740 毫秒
381.
382.
Latinos are the largest and fastest growing minority youth group in the United States. Currently, Latino adolescents experience higher rates of teen pregnancy compared to any other racial or ethnic group and have disproportionately high levels of sexually transmitted infections and HIV. Latino teens are also affected by a number of social problems such as school dropout, poverty, depression and limited access to healthcare, which contributes to disparities in reproductive health outcomes for this population. Relatively few intervention research studies and programs have been dedicated to reducing sexual risk among Latino youth, despite their particular vulnerabilities in experiencing negative reproductive health outcomes. We provide recommendations for identifying the unique reproductive health needs of Latino youth and specific applied strategies so that agency-based social workers and other providers can develop family-based interventions that improve adolescent Latino sexual and reproductive health.  相似文献   
383.
384.
Trees provide important ecological services in cities, yet the vulnerability of the urban forest to massive tree losses from pest outbreaks could threaten those services, with unknown environmental consequences. The outbreak of emerald ash borer is an imminent threat to the ash population in North America. In the Minneapolis?CSaint Paul, Minnesota, metropolitan area, ash trees are present in 50?% of residential landscapes in Ramsey and Anoka Counties. We used a large survey of household activities, a tree inventory, a Household Flux Calculator accounting tool, and a set of annual evapotranspiration measurements, to quantify the current carbon, nitrogen, and phosphorus storage in ash trees, the cycling of these elements, and the total evapotranspiration from ash trees in residential areas in the metropolitan region. Ash represented 6?% of the trees in residential areas and the removal of the entire ash population would correspondingly reduce net primary production and carbon sequestration by only a few percent and would have negligible effects on losses of nitrogen and phosphorus from residential landscapes. Similarly, the effects of ash loss on the hydrologic cycle would be minimal and would depend largely on management choices for the ground currently underneath ash tree canopies. Overall, the percentage change in biogeochemical and hydrological fluxes corresponded closely with the percent of the total urban tree population that was represented by ash, suggesting that areas with higher densities of ash would experience correspondingly larger effects. A hypothetical tree replacement scenario with similar broadleaf species was determined to be likely to re-establish the original biogeochemical and hydrological conditions once the replacement trees reach maturity.  相似文献   
385.
We explored the role that exogenous and endogenous competitors for attention play in infants’ abilities to encode and retain information over a 6‐month period. Sixty‐six children visited the laboratory at 15 months, and 32 returned for a second visit at 21 months. Children observed models of conventional‐ relation and enabling‐relation action sequences. Half the children were distracted by a “Mister Monkey” mechanical toy during the conventional‐relation sequence, while the other half was distracted during the enabling‐relation sequence. The Early Childhood Behavior Questionnaire indexed endogenous factors at both ages. Immediate postmodel production of target actions indexed encoding efficiency, and 6‐month production of target actions indexed long‐term recall. The exogenous distracter impacted encoding efficiency (i.e., immediate recall), but not long‐term recall. Endogenous factors (i.e., temperament) were primarily associated with long‐term recall. Of special interest was our finding that endogenous factors, especially surgency, moderated the effect of the exogenous distracter. It appears that when learning conventional‐relation sequences in the presence of exogenous distracters, surgency mobilizes attentional resources toward the learning objective; however, when learning enabling‐relation sequences under the same conditions, surgency either boosts the saliency of the distracters or boosts children’s susceptibility to them.  相似文献   
386.
Transnational marriages of migrants in Western Europe tend to be seen as hampering integration. In response, policies have been tightened, despite little knowledge on transnational marriages and the effects of such measures. This paper investigates the role of individual preferences and contextual factors such as family reunification policies, group size and development levels of the regions of origin in partner choice of the children of Turkish and Moroccan immigrants. We draw on a novel dataset collected in Austria, Belgium, France, Germany, the Netherlands, and Sweden. Our findings suggest that transnational marriages are partly associated with contextual factors such as a rural origin and family reunification policies. The analysis indicates higher rates of transnational marriages under open family reunification policies, providing tentative evidence of policy effects. On the individual level, the choice of a partner from the parents' origin country is associated with religiosity.  相似文献   
387.
Significant numbers of older people worldwide have a drinking level or pattern which places them at risk of harm. In England, older people are more likely to be admitted to hospital for an alcohol-related condition than younger people and levels of alcohol-related harm are increasing fastest in this population. Whilst alcohol problems in older people are highly treatable, they frequently go undetected or ignored. The aim of this study was to develop guidelines for health and social care workers on what intervention strategies are likely to work best with older drinkers. Insight from alcohol practitioners who specialise in working with older people and the perspectives of older people receiving alcohol treatment were gained through focus groups and individual interviews. This paper reports some of the key findings including a perception that health and social care workers often did not intervene when alcohol misuse was suspected because of ageist attitudes and false beliefs about older people's drinking. Participants however acknowledged that social workers faced difficult choices in relation to the ‘right’ of older people with alcohol problems to continue to drink and the ‘risk’ associated with them doing so. The implications for social work education and training are discussed.  相似文献   
388.
Given the increasing numbers of people in need of treatment for problems associated with Alcohol and Other Drugs (AOD) problems and the concomitant likelihood that social worker caseloads currently reflect this increase, a critical analysis of social work student attitudes towards different approaches to AOD treatment is warranted. Our study examined United States' social work students' (n = 100) attitudes towards treatment approaches to practice with people who misuse/abuse AOD and enlisted a Consequence Analysis (CA) intervention designed to shift attitudes towards considering a harm reduction approach. The Harm Reduction Acceptability Scale (HRAS), as well as a two-item response measure, measured pretest and posttest attitudes. Findings demonstrate that at pretest both intervention and comparison groups were willing to consider a goal of moderation (a proxy for the acceptability of a harm reduction approach and a client-centered perspective), and neutral on the effectiveness of an abstinence-oriented approach. At posttest, the intervention group became more flexible and open to the broader philosophical perspective of a harm reduction approach while the comparison group became less so. Consequence Analysis appears responsible for producing the observed changes in attitude towards harm reduction. Implications for international social work education and training are discussed.  相似文献   
389.
Financial abuse by a family member is the most common form of abuse experienced by older Australians, and early intervention is required. National online surveys of 228 chief executive officers and 214 aged care service providers found that, while they were well placed to recognize financial abuse, it was often difficult to intervene successfully. Problems providers encountered included difficulties in detecting abuse, the need for consent before they could take action, the risk that the abusive family member would withdraw the client from the service, and a lack of resources to deal with the complexities inherent in situations of financial abuse.  相似文献   
390.
Decision makers face difficult choices when tasked with identifying and implementing appropriate mechanisms for protecting the elderly and other vulnerable adults from abuse. A pilot project involving fingerprint-based criminal history background checks for personal care workers in Michigan has supplied an opportunity to examine one such mechanism. In conjunction with the pilot project, we have conducted a stakeholder analysis with the aim of informing decision makers about stakeholder perceptions of standard policy criteria like effectiveness, efficiency, and equity. We employed focus groups and a Web-based survey to collect data from stakeholders. While stakeholders generally see fingerprint-based background checks for personal care workers as potentially effective and as a net benefit, they also point to a variety of contingencies. They also recognize difficulties and constraints for government involvement. This preliminary analysis provides solid foundational information for decision makers and for more extensive benefit–cost analysis.  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