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   449篇
  免费   11篇
管理学   51篇
民族学   5篇
人口学   47篇
丛书文集   3篇
理论方法论   57篇
综合类   5篇
社会学   275篇
统计学   17篇
  2023年   1篇
  2022年   2篇
  2021年   2篇
  2020年   7篇
  2019年   7篇
  2018年   11篇
  2017年   23篇
  2016年   18篇
  2015年   14篇
  2014年   7篇
  2013年   82篇
  2012年   15篇
  2011年   21篇
  2010年   18篇
  2009年   8篇
  2008年   15篇
  2007年   19篇
  2006年   15篇
  2005年   16篇
  2004年   12篇
  2003年   10篇
  2002年   17篇
  2001年   16篇
  2000年   9篇
  1999年   9篇
  1998年   12篇
  1997年   9篇
  1996年   6篇
  1995年   2篇
  1994年   6篇
  1993年   4篇
  1992年   5篇
  1991年   6篇
  1990年   1篇
  1988年   5篇
  1987年   5篇
  1986年   5篇
  1985年   6篇
  1984年   5篇
  1983年   4篇
  1980年   1篇
  1979年   1篇
  1978年   1篇
  1977年   1篇
  1971年   1篇
排序方式: 共有460条查询结果,搜索用时 31 毫秒
131.
Objective . This study examines how retaining an immigrant culture affects school dropout rates among Vietnamese, Koreans, Chinese, Filipinos, Japanese, Mexicans, Puerto Ricans, and Cubans. Methods . I use 1990 Census data to analyze how language use, household language, and presence of immigrants in the household affect dropping out of school. Results . Overall, I found that these measures have similar effects on these diverse groups: bilingual students are less likely to drop out than English-only speakers, students in bilingual households are less likely to drop out than those in English-dominant or English-limited households, and students in immigrant households are less likely to drop out than those in nonimmigrant households. Conclusions . These findings suggest that those who enjoy the greatest educational success are not those who have abandoned their ethnic cultures and are most acculturated. Rather, bicultural youths who can draw resources from both the immigrant community and mainstream society are best situated to enjoy educational success.  相似文献   
132.
ABSTRACT

Empathy is identified as a protective factor that has been helpful for children considered at high risk for poor mental health and social functioning due to experiencing stressful circumstances such as family violence, substance abuse of a parent, or poverty. Yet, little is known about its relevance to a family's ability to overcome adversity. This study examined the narratives of 20 resilient families who maintained family functioning despite experiencing a multitude of risk factors including poverty, death of a child, significant health problems, or substance abuse problems. Narrative analysis was used to identify the ways families situated empathic actions within their stories of resilience. Findings suggest families developed increased compassion for others as a result of their own experiences with loss, trauma, or stress and discussed how helping others increased their ability to cope with the challenges they faced. Future research and practice implications are outlined and support the usefulness of strengths-based concepts and interventions.  相似文献   
133.
Prospects for service integration between settlement houses, or traditional neighborhood centers that offer services for individuals ranging from preschool children to the elderly, and family resource centers, agencies that provide support for families and early childhood education programs, are explored in this Rochester, New York, case study. Although the target populations of these two types of organizations overlap, service integration is not likely in the short run due to differing organizational philosophies and the adaptation of each organization to unique funding sources. Increased funding pressures and demands for greater efficiency in service delivery may make collaboration more attractive in the future.  相似文献   
134.
There is increased demand for maternal mortality estimates as a result of the choice of the Maternal Mortality Ratio as the key indicator for Millennium Development Goal 5. Given this strong demand, the United Nations Principles and Recommendations for Population Censuses suggest the inclusion of questions on recent household deaths, plus questions to identify pregnancy-related deaths in countries lacking empirical, national estimates. This paper evaluates the results of census-based measurement of pregnancy-related mortality using three different types of consistency checks applied in selected countries. Results from these evaluations are mixed. Overall, the census approach seems to produce robust estimates of the number of births. However, the consistency and plausibility of results relating to mortality vary substantially by country and by indicator. It is not clear whether the census-based methodology performs better or worse than the frequently used sibling histories. The results presented here clearly demonstrate the need for careful data evaluation and interpretation.  相似文献   
135.
136.
The purpose of this study was to assess the impact of two types of pregnancy prevention programs on youths’ behavioral intentions. Before and after participating in a series of adolescent pregnancy prevention support group meetings guided by abstinence OR service learning curricula, 88 youth, ages 13 and 14 years, forecasted their future life plans. Repeated measures analysis with two groups by two time points was conducted to assess changes in life forecasts over time and differences between the programs. From pre-test to post-test in the abstinence-based program there was reduction in plans to have first baby before marriage (p < .05). There were no significant changes in youths’ forecasts regarding sexual debut in either group. Implications for research and practice are discussed.  相似文献   
137.
With advancement of technologies such as genomic sequencing, predictive biomarkers have become a useful tool for the development of personalized medicine. Predictive biomarkers can be used to select subsets of patients, which are most likely to benefit from a treatment. A number of approaches for subgroup identification were proposed over the last years. Although overviews of subgroup identification methods are available, systematic comparisons of their performance in simulation studies are rare. Interaction trees (IT), model‐based recursive partitioning, subgroup identification based on differential effect, simultaneous threshold interaction modeling algorithm (STIMA), and adaptive refinement by directed peeling were proposed for subgroup identification. We compared these methods in a simulation study using a structured approach. In order to identify a target population for subsequent trials, a selection of the identified subgroups is needed. Therefore, we propose a subgroup criterion leading to a target subgroup consisting of the identified subgroups with an estimated treatment difference no less than a pre‐specified threshold. In our simulation study, we evaluated these methods by considering measures for binary classification, like sensitivity and specificity. In settings with large effects or huge sample sizes, most methods perform well. For more realistic settings in drug development involving data from a single trial only, however, none of the methods seems suitable for selecting a target population. Using the subgroup criterion as alternative to the proposed pruning procedures, STIMA and IT can improve their performance in some settings. The methods and the subgroup criterion are illustrated by an application in amyotrophic lateral sclerosis.  相似文献   
138.
This paper explores how formalization of employee selection procedures for the purpose of ensuring equality of opportunity can become so extensive that the intended outcome of fairness is undermined. Drawing on empirical evidence from a large media organization, the analysis reveals the detrimental impact of formalization in relation to the recruitment of ethnic minority staff. While the existing literature describes how, during recruitment of employees, the circumvention of formal equality procedures can occur through managerial neglect and manipulation, the analysis in this paper shows that, paradoxically, circumvention can also occur through compliance with procedures. This new category takes three forms (robotic, defensive and malicious) and appears under conditions of excessive formalization – the term hyper‐formalization is coined to describe this. The paper develops new concepts that add to understanding of the limitations of equality and diversity procedures, and brings fresh challenges to some of the liberal assumptions about the efficacy and desirability of formalization for achieving fairness.  相似文献   
139.
Innovation is the bedrock of organizational and national competitiveness across the globe. Leaders of research and development (R&D) teams have an especially important role to play given their direct influence on leading, organizing, rallying, and managing the operations of innovative tasks. However, when it comes to how leaders influence R&D innovation in different contexts, researchers' opinions diverge. This study explores leadership characteristics and their contextual contingencies, using the approach of a multiple case study. This paper is situated in the stream of research focusing on the interactions of leadership and contextual factors in innovation. We collected qualitative data from four highly innovative teams residing in two national laboratories in the US. The results suggest that while leadership demonstrates similarities across the four teams – a simultaneous focus on the internal and external domains, it also displays different characteristics in teams that differ on three contextual factors: funding model, nature of tasks, and team structure. Theoretical and practical implications are drawn.  相似文献   
140.
Relatively little attention has been paid to the use and importance of labels used by men who have sex with men to describe insertive or receptive sexual behavior during intercourse. This study examines sexual self-labels, sexual behavior, HIV transmission risk, and psychological functioning among 205 HIV-seropositive men who have sex with men. The majority of participants (88%) identified as a top, a bottom, or versatile. Tops were more likely to engage in insertive anal intercourse than bottoms, and bottoms were more likely to engage in receptive anal intercourse than tops, with versatiles reporting intermediate rates of both behaviors. Although the results suggest preliminary evidence regarding the predictive utility of self-labels, sexual behaviors of self-label groups were greatly overlapping. Differences were found among self-label groups in gay self-identification, internalized homophobia, sexual sensation seeking, and anxiety. Results suggest an added value in assessing self-labels in addition to asking about sexual behavior.  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