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   411篇
  免费   18篇
各国政治   24篇
工人农民   56篇
世界政治   31篇
外交国际关系   18篇
法律   216篇
中国政治   4篇
政治理论   79篇
综合类   1篇
  2023年   3篇
  2022年   2篇
  2021年   9篇
  2020年   8篇
  2019年   13篇
  2018年   17篇
  2017年   16篇
  2016年   20篇
  2015年   13篇
  2014年   18篇
  2013年   59篇
  2012年   16篇
  2011年   11篇
  2010年   16篇
  2009年   18篇
  2008年   18篇
  2007年   16篇
  2006年   8篇
  2005年   14篇
  2004年   14篇
  2003年   14篇
  2002年   10篇
  2001年   5篇
  2000年   12篇
  1999年   4篇
  1998年   5篇
  1997年   11篇
  1996年   5篇
  1995年   7篇
  1994年   1篇
  1993年   3篇
  1992年   2篇
  1990年   5篇
  1989年   5篇
  1988年   2篇
  1987年   5篇
  1986年   1篇
  1985年   7篇
  1984年   3篇
  1983年   2篇
  1982年   2篇
  1980年   4篇
  1979年   1篇
  1977年   2篇
  1974年   1篇
  1968年   1篇
排序方式: 共有429条查询结果,搜索用时 46 毫秒
261.
The relationship between physical abuse and family functioning was investigated in a comparative study of victims of adolescent physical abuse. The sample consisted of 99 physically abused adolescents and 99 nonabused adolescents who were administered the Parental Bonding Instrument (PBI) and Family Adaptability and Cohesion Evaluation Scale (FACES III). These measures assess family functioning in terms of adolescents' perception of their family's cohesiveness, flexibility, and the degree to which their parents provide care and protection. The relationship between family functioning and physical abuse, severity of abuse, and date of abuse onset was investigated. Abused adolescents perceived their families as significantly less adaptable, less cohesive, and less balanced than the comparison adolescents. Fathers and mothers of abused adolescents were viewed as less caring; abuse group fathers were also viewed as more overprotective. Family functioning was not different when childhood-onset abuse was compared to adolescent-onset abuse. Severity of abuse also did not differ in the childhood and adolescent onset groups. It was concluded that physically abused adolescents view their families as rigid, and their parents as emotionally unavailable. Treatment needs and intervention strategies for these families are outlined.  相似文献   
262.
From the point of view of modes of governance and constellations of interdependence, EU research policy offers ideal conditions for the flexible inclusion of non‐member states: it is based on transgovernmental coordination through policy networks rather than supranational legislation, it follows scientific rather than political imperatives, and cooperation is in the interest of both the EU and of Switzerland. This article analyses the degree to which these factors have allowed for Switzerland's inclusion into the regulatory and organisational aspects of EU research policy, and highlights the limits of such flexible sectoral integration.  相似文献   
263.
This study examined the mediating role of self-blaming attributions on peer victimization-maladjustment relations in middle school and the moderating role of classroom ethnic diversity. Latino and African American 6th grade participants (N = 1105, 56% female) were recruited from middle schools in which they were either members of the numerical majority ethnic group, the numerical minority, or one of several ethnic groups in ethnically diverse schools. Peer nomination data were gathered in the Fall of 6th grade to determine which students had reputations as victims of harassment and self-report data on self-blame for peer harassment and the adjustment outcomes of depressive symptoms and feelings of self-worth were gathered in the Spring of 6th grade, approximately 6 months later. A mediational model in which self-blame partly explained the relation between victimization and maladjustment was supported among students from the majority ethnic group in their classroom but not among students from the minority group. The usefulness of including ethnic diversity as an important context variable in studies of peer victimization during early adolescence was discussed.
Sandra GrahamEmail:

Amy D. Bellmore   is an Assistant Professor at University of Wisconsin, Madison in the Department of Educational Psychology. Her research interests include peer-directed aggression, ethnicity and ethnic contexts, and the development of interpersonal perception. Adrienne Nishina   is currently an Assistant Professor in the Department of Human and Community Development at University of California, Davis. Her major research interests include mental health in schools, adolescent peer relations, and ethnic diversity. Jaana Juvonen   is a Professor and Chair of the Developmental Psychology Program at University of California, Los Angeles. Her area of expertise is in young adolescent peer relationships and school adjustment.  相似文献   
264.
The current study modeled trajectories of substance use from ages 15 to 20 among 1,095 male serious juvenile offenders (M age = 16.54; 42% African-American, 34% Latino, 20% European-American, and 4% other ethnic/racial backgrounds) and prospectively predicted trajectories from risk and protective factors before and after controlling for time spent in a supervised setting. Results indicated that supervised time suppressed age-related growth in substance use. Trajectories of offenders with no supervised time and low levels of supervised time increased in substance use across age, whereas offenders with high levels of supervised time showed no growth. Almost all risk and protective factors had effects on initial substance use but only adolescent history of substance use, impulse control, and psychosocial maturity had an effect on change in substance use over time. Findings highlight the importance of formal sanctions and interventions superimposed on normal developmental processes in understanding trajectories of substance use among serious juvenile offenders.
Delfino Vargas-ChanesEmail:

Anne Marie Mauricio,   Ph.D., is a research faculty member at the Prevention Research Center at Arizona State University. She received her Ph.D. in Counseling Psychology from Michigan State University. Her major research interests include interpersonal violence and preventative interventions for substance use, academic disengagement, and mental health disorders. Michelle Little,   Ph.D., is an Assistant Professor at the University of Texas at San Antonio. She received her Ph.D. in Developmental Psychology from Temple University. Her major research interests include prevention of externalizing disorders. Laurie Chassin,   Ph.D., is a Regents Professor of Psychology at Arizona State University. She received her Ph.D. in Clinical Psychology from Teachers College, Columbia University. Her major research interests include the development and intergenerational transmission of alcohol, tobacco, and other drug use and substance use disorders. George P. Knight,   Ph.D., is a Professor in the Department of Psychology at Arizona State University. He received his Ph.D. in 1980 from the University of California at Riverside. His research interests include cultural adaptation in immigrant and minority youth and adults as well as methodological issues associated with research on ethnic minority families. Alex R. Piquero,   Ph.D., is presidential scholar and professor in the Department of Criminology & Criminal Justice at the University of Maryland College Park. He received his Ph.D. in Criminology from the University of Maryland College Park in 1996. His major research interests include criminal careers, criminological theory, and quantitative research methods. Sandra H. Losoya,   Ph.D., is a research assistant professor of psychology at Arizona State University. She received her Ph.D. in developmental psychology, specializing in socio-emotional development, from the University of Oregon. Her research interests include individual differences in emotional responding and coping, and sources of resilience in high-risk children. Delfino Vargas-Chanes,   Ph.D., is research faculty member in the Department of Psychology at Arizona State University. He received his Ph.D. in Sociology from Iowa State University. His major research interests include development of measurement instruments, structural equation modeling, multilevel modeling and advanced statistical analyses applied to social and behavioral sciences.  相似文献   
265.
This investigation examined the precursors of adolescents’ participation in sport and music activities in the United States by testing a developmental model across 7 years. Data were drawn from youth questionnaires in the Childhood and Beyond Study (92% European American; N = 594). Findings suggest that patterns of participation across a 3-year period in elementary school predict adolescents’ participation through their motivational beliefs. Specifically, children who participated in an activity, children who participated consistently across multiple years, and children who were highly active had higher adolescent motivational beliefs 4 years later than their peers. These motivational beliefs, in turn, positively predicted adolescents’ participation 1 year later. Cross-domain analyses suggest that children typically maintain their orientation toward sports and music (e.g., high music-low sport orientation, not oriented toward either domain) as they age. These findings highlight the consistency in children’s leisure pursuits and interests from childhood through adolescence.  相似文献   
266.
This article tracks continuities between early nineteenth-century female abolitionism and the role of white women reformers in Britain in the campaigns against segregation and lynch law in the USA, and on behalf of black rights in British colonies in the early twentieth century. It argues the value of a transnational perspective to these questions. More particularly, it explores the working out of the ‘maternalist’ legacy of female abolitionism, and the increasing problematising of ‘blackness’ and ‘Africanness’ in the perspectives of a circle of white women reformers in Britain.  相似文献   
267.
268.
Abstract

Foreign direct investment (FDI) can deliver benefits beyond the provision of capital, such as efficiency gains. We argue that the theorised positive effects of economic linkage are reduced when linkages are based on natural resources. Domestic elite coalitions supporting reform are also weaker in countries with extensive natural resources. Kazakhstan and Azerbaijan have high-value natural resources and significant FDI, making them most likely cases for reform. Kyrgyzstan is a contrasting case as it has few natural resources. We find that the institutional reforms we would anticipate because of linkages have not occurred and those that exist are often cosmetic.  相似文献   
269.
Eliza Oldham (c.1820–92) worked as a general maid in Rochdale and Halifax from the 1840s to the 1870s. A set of her letters to a wealthy relation of two of her employers, Helen Priestman Bright Clark (1840–1927), has been preserved, indicating their close friendship. This article asks what kind of friendship was possible in such a socially and economically unequal relationship, and what it might tell us about class identities and class contest. It locates the basis of this friendship in the emotional labour involved in domestic service, alongside the complex intersection of work, family and community life with larger arenas of radical and gender politics.  相似文献   
270.
The analysis of cannabis plant material submitted to seized‐drug laboratories was significantly affected by the signing of the Agricultural Improvement Act of 2018, which defined hemp and removed it from the definition of marijuana in the Controlled Substances Act. As a result, field law enforcement personnel and forensic laboratories now are in need of implementing new protocols that can distinguish between marijuana‐type and hemp‐type cannabis. Colorimetric tests provide a cost‐effective and efficient manner to presumptively identify materials prior to submission to a laboratory for analysis. This work presents the validation of the 4‐aminophenol (4‐AP) color test and demonstrates its utility for discriminating between marijuana‐type and hemp‐type cannabis (i.e., typification). Validation studies included the testing of numerous cannabinoid reference materials, household herbs, previously characterized cannabis plant samples, and real‐case samples. The 4‐AP test reliably produces a pink result when the level of Δ9‐tetrahydrocannabinol (THC) is approximately three times lower than the level of cannabidiol (CBD). A blue result is generated when the level of THC is approximately three times higher than that of CBD. Inconclusive results are observed when the levels of THC and CBD are within a factor of three from each other, demonstrating the limitations of the test under those scenarios.  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