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   709篇
  免费   18篇
各国政治   32篇
工人农民   109篇
世界政治   51篇
外交国际关系   46篇
法律   332篇
中国政治   17篇
政治理论   136篇
综合类   4篇
  2023年   7篇
  2022年   4篇
  2021年   6篇
  2020年   7篇
  2019年   9篇
  2018年   17篇
  2017年   25篇
  2016年   21篇
  2015年   18篇
  2014年   23篇
  2013年   88篇
  2012年   24篇
  2011年   16篇
  2010年   21篇
  2009年   22篇
  2008年   17篇
  2007年   27篇
  2006年   36篇
  2005年   18篇
  2004年   26篇
  2003年   20篇
  2002年   30篇
  2001年   11篇
  2000年   9篇
  1999年   21篇
  1998年   11篇
  1997年   11篇
  1996年   10篇
  1995年   14篇
  1994年   8篇
  1993年   11篇
  1992年   10篇
  1991年   7篇
  1990年   9篇
  1989年   12篇
  1988年   8篇
  1987年   9篇
  1986年   8篇
  1985年   6篇
  1984年   10篇
  1983年   6篇
  1982年   8篇
  1981年   10篇
  1980年   6篇
  1978年   3篇
  1977年   4篇
  1976年   4篇
  1975年   3篇
  1972年   3篇
  1971年   4篇
排序方式: 共有727条查询结果,搜索用时 15 毫秒
221.
Moskos MA  Achilles J  Gray D 《危机》2004,25(4):176-182
In the United States, teen suicide rates tripled over several decades, but have declined slightly since the mid-1990s. Suicide, by its nature, is a complex problem. Many myths have developed about individuals who complete suicide, suicide risk factors, current prevention programs, and the treatment of at-risk youth. The purpose of this article is to address these myths, to separate fact from fiction, and offer recommendations for future suicide prevention programs. Myth #1: Suicide attempters and completers are similar Myth #2: Current prevention programs work. Myth #3: Teenagers have the highest suicide rate. Myth #4: Suicide is caused by family and social stress. Myth #5: Suicide is not inherited genetically. Myth #6: Teen suicide represents treatment failure. Psychiatric illnesses are often viewed differently from other medical problems. Research should precede any public health effort, so that suicide prevention programs can be designed, implemented, and evaluated appropriately. Too often suicide prevention programs do not use evidence-based research or practice methodologies. More funding is warranted to continue evidence-based studies. We propose that suicide be studied like any medical illness, and that future prevention efforts are evidence-based, with appropriate outcome measures.  相似文献   
222.
In the United States, federal law and many state laws differentiate between marijuana and industrial hemp through delta-9-tetrahydrocannabinol (THC) levels, whereby the latter is defined as ≤0.3 percent THC on a dry weight basis. Many traditional cannabis identification methods employed by crime laboratories cannot accurately determine total THC quantities in accordance with federal and state regulations, or do so with increased time, labor, and risks of instrument damage. In order to quickly distinguish positive marijuana samples, a method was developed to identify plant material with a total THC level >1%. This novel, automated dispersive pipette extraction (DPX) method uses tip-based technology and an automated liquid handler to enable fast, hands-free selective isolation of THC and its precursors for downstream gas chromatography–mass spectrometry (GC-MS) analysis. The workflow proceeds with no repetitive manual effort and reduced need for instrument maintenance while enabling crime labs to legally identify marijuana through the detection of total THC above 1%. Recovery of THC using the DPX extraction method was 93% at 30 µg/mL and 78% at 500 µg/mL. Similarly, THCA-A recovery was 100% at 30 µg/mL and 74% at 500 µg/mL. Samples evaluated in a blind study (proficiency, hemp, and nonprobative case samples) were all accurately identified as greater than or less than 1% THC, with samples containing <1% THC being identified as “cannabis” and subjected to more discriminative analysis as needed.  相似文献   
223.
Reviews     
The Absence of lzanagi By Kei Takei Performed at La MaMa E.T.C., New York June 22–25, 2000

Otome Bunraku performs two Japanese classics Japan Society, New York September 13–16, 2000

Towa—Part I—Kanojo (Eternity—Part I—She) By Kishida Rio Performed at Kinokuniya Southern Theatre, Tokyo August 31‐September 9, 2000

Toothless By Kazuko Hohki Performed at Battersea Arts Centre, London June‐July 2000

Hagi‐ke no San‐Shimai (Three Sisters of the Hagi Family) By Nagai Ai Performed at Theatre Tram, Setagaya Public Theatre, Tokyo November 4–19, 2000

Women's Gidayū and the Japanese Theatre Tradition. By A. Kimi Coaldrake. 1998. London and New York: Nissan Institute, Routledge Japanese Studies Series. Xxix+262. With nine‐track CD.

Takarazuka: Sexual Politics and Popular Culture in Modern Japan. By Jennifer Robertson. 1998. University of California Press, Japan. Xvi+278.

Angura: Posters of the Japanese Avant‐Garde. David G. Goodman. 1999. New York: Princeton Architectural Press. Viii+91.

About Face: Performing Race in Fashion and Theater. By Dorinne Kondo. 1997. New York and London: Routledge. xiii +277.  相似文献   
224.
A two-year collaboration among researchers, practitioners, and advisers from the major national organizations of mediators produced a job analysis relevant to mediators involved in interpersonal disputes (i.e., divorce, community, formal parent-child mediation, etc.). One byproduct of the job analysis is an extensive list of the knowledge areas and skills important to effective job performance. This essay defines the knowledge and skill areas that emerged from the analysis.  相似文献   
225.
While studies investigating the health effects of racial discrimination for children and youth have examined a range of effect modifiers, to date, relationships between experiences of racial discrimination, student attitudes, and health outcomes remain unexplored. This study uniquely demonstrates the moderating effects of vicarious racism and motivated fairness on the association between direct experiences of racism and mental health outcomes, specifically depressive symptoms and loneliness, among primary and secondary school students. Across seven schools, 263 students (54.4 % female), ranging from 8 to 17 years old (M = 11.2, SD = 2.2) reported attitudes about other racial/ethnic groups and experiences of racism. Students from minority ethnic groups (determined by country of birth) reported higher levels of loneliness and more racist experiences relative to the majority group students. Students from the majority racial/ethnic group reported higher levels of loneliness and depressive symptoms if they had more friends from different racial/ethnic groups, whereas the number of friends from different groups had no effect on minority students’ loneliness or depressive symptoms. Direct experiences of racism were robustly related to higher loneliness and depressive symptoms in multivariate regression models. However, the association with depressive symptoms was reduced to marginal significance when students reported low motivated fairness. Elaborating on the negative health effects of racism in primary and secondary school students provides an impetus for future research and the development of appropriate interventions.  相似文献   
226.
Recent research suggests that youths interpret parental control and that this may have implications for how control affects youths’ adjustment. In this study, we propose that youths’ feelings about being over-controlled by parents and feeling connected to parents are intermediary processes linking parental control and youths’ adjustment. We used three years of longitudinal data sampled from 1,022 Swedish youths in 7th, 8th, and 9th grade (47.3% girls; 12–17 years old, M age = 14.28 years, SD = .98) who were mainly Swedish in ethnic origin. We tested models linking parental control (i.e., rules, restriction of freedom, and coldness-rejection) to adjustment (i.e., norm-breaking, depressive symptoms, and self-esteem) through youths feeling over-controlled by and connected to parents. The overall model incorporating youths’ feelings showed that restrictions and coldness-rejection were both indirectly linked to increases in norm-breaking and depressive symptoms through increases in youths feeling over-controlled. Parental rules still independently predicted decreases in norm-breaking and in self-esteem, and coldness-rejection predicted increases in norm-breaking. In addition, some paths (e.g., feeling over-controlled to self-esteem) depended on the youths’ age, whereas others depended on their gender. These results suggest that when youths’ feelings are taken into account, all behavioral control is not the same, and the line between behavioral control and psychological control is blurred. We conclude that it is important to consider youths’ feelings of being controlled and suggest that future research focus more on exploring this idea.  相似文献   
227.
This study examines the short‐ and long‐term impact of AmeriCorps participation on members' civic engagement, education, employment, and life skills. The analysis compares changes in the attitudes and behaviors of participants over time to those of individuals not enrolled in AmeriCorps, controlling for interest in national and community service, member and family demographics, and prior civic engagement. Results indicate that participation in AmeriCorps led to positive impacts on members, especially in the area of civic engagement, members' connection to community, knowledge about problems facing their community, and participation in community‐based activities. AmeriCorps had some positive impacts on its members' employment‐related outcomes. Few statistically significant impacts were found for measures of participants' attitude toward education or educational attainment, or for selected life skills measures. Within a subset of community service programs that incorporate a residential component for members, the study also uncovered a short‐term negative impact of participation on members' appreciation for ethnic and cultural diversity, which disappeared over time. The implications of these findings for future research on national service are discussed. © 2009 by the Association for Public Policy Analysis and Management.  相似文献   
228.
229.
This study considers the social media visual messaging of four candidates in the 2012 U.S. Republican presidential primary campaign. The analysis is guided by symbolic convergence theory, its method of fantasy theme analysis, and visual rhetoric theory. Using a schema of visual attributes, this study analyzes a rhetorical strategy of candidates' campaigns: the pictorial “public diary” found on their official Facebook and Twitter pages. It reveals how the credibility character traits of trustworthiness and expertise appear in the candidates' visual narratives, what messages dominate, and how candidates differ in succeeding or failing to visually communicate credibility. This study has important implications for how political management can use images in crafting and assessing messaging strategies in a competitive environment.  相似文献   
230.
Youth reporting independently elevated levels of religiosity and self-efficacy tend to abstain from externalizing behavior. However, little is known about the ways in which religiosity and self-efficacy interrelate to impact youth externalizing. Drawing from a sample of African American youth from public housing communities (N = 236), we use latent profile analysis to identify subtypes of youth based on self-reported religiosity and self-efficacy and, in turn, examine links with crime. Compared to youth in other subgroups, those classified as both highly religious and highly self-efficacious reported less involvement in minor and severe delinquency, but not violence.  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