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   399篇
  免费   22篇
各国政治   9篇
工人农民   51篇
世界政治   13篇
外交国际关系   10篇
法律   274篇
中国政治   8篇
政治理论   54篇
综合类   2篇
  2024年   12篇
  2023年   36篇
  2022年   4篇
  2021年   12篇
  2020年   9篇
  2019年   22篇
  2018年   26篇
  2017年   12篇
  2016年   22篇
  2015年   14篇
  2014年   18篇
  2013年   44篇
  2012年   21篇
  2011年   18篇
  2010年   11篇
  2009年   10篇
  2008年   13篇
  2007年   21篇
  2006年   21篇
  2005年   18篇
  2004年   14篇
  2003年   10篇
  2002年   9篇
  2001年   4篇
  2000年   3篇
  1998年   1篇
  1997年   1篇
  1996年   2篇
  1995年   1篇
  1993年   1篇
  1992年   1篇
  1991年   1篇
  1989年   1篇
  1988年   1篇
  1987年   1篇
  1986年   2篇
  1985年   2篇
  1982年   1篇
  1974年   1篇
排序方式: 共有421条查询结果,搜索用时 15 毫秒
381.
While researchers have provided evidence that recent stressors in adulthood and single traumatic events in childhood predict psychological disorder, few have examined the cumulative impact of childhood adversity on later well-being. Using a sample of 649 college students from New England, this research examines whether cumulative trauma in childhood and adolescence is related to depressive symptoms in young adults, and explores the mediating factors that operate in this association. Results indicate clear differences in cumulative trauma by sociodemographic characteristics, with males, nonwhites, and those with less than college-educated parents, reporting significantly greater levels of adversity. We also find that higher trauma is associated with both early onset of depressive disorder and later depressive symptoms. Path analyses reveal that, while some of the association between childhood adversity and depression in young adults is direct, most is explained by the mediating effects of later stress, low self-esteem, and early onset of disorder.  相似文献   
382.
ABSTRACT

Human rights discourse in health advocacy is largely correlated with experiences of vulnerability, marginalisation and discrimination, with the global story of HIV activism the most visible example. In a domestic context where culture, consensus and belonging are highly valued, both human rights and lesbian, gay, bisexual, transgender and intersex (LGBTI) people face critiques of being foreign, un-African, new, individualistic and threatening to tradition. Why, when and how do civil society actors draw on human rights to advocate for LGBTI health in relation to HIV in Botswana? I examine this paradox through a case study of the key civil society actor in this sector. I argue that while formal structures and belief shape why the group engages with human rights, when and how human rights are invoked is shaped by perceptions of threat, cultural context, and belonging.  相似文献   
383.
384.
Elizabeth D. Harvey, Ventiloquized Voices: Feminist Theory and English Reniassance Texts (Routledge) London and New York, [1992 rpt], 1995.

Andrew Lynch and Philippa Maddern (eds), Venus and Mars: Engendering Love and War in Medieval and Early Modem Europe (University of Western Australia Press) Nedlands, 1995.  相似文献   

385.
386.
Perceptions of children's credibility were studied in two experiments wherein participants watched a videotape of a 4- to 5- or a 6- to 7-year old child report details of a play session that had been experienced once (single-event) or was the last in a series of four similar play sessions (repeat-event). The child's report was classified as high or low accurate. In Experiments 1 and 2, reports of repeat-event children were judged to be less believable on several measures. In Experiment 1, younger children were viewed as less credible than older children. In both experiments, neither undergraduates nor community members correctly discriminated between high- and low-accurate reports. Content analysis in Study 3 revealed the relationship between age and event frequency and children's credibility ratings was mediated by the internal consistency of children's reports. Recent research on children's reports of instances of repeated events has identified several challenges facing children who report repeated abuse. These data bring to light another potential difficulty for these children.  相似文献   
387.
Abstract: The Food and Drug Administration does not require surgical sutures to be tracked by manufacturer, physician, or patient; thereby, surgical sutures have been of little use to forensic practitioners who are tasked with establishing a positive identification with biological evidence. This study demonstrates the investigative process used to pinpoint suture manufacturers by presenting a case where surgical sutures were a distinctive characteristic that aided in the positive identification of skeletal remains. The suture’s manufacturer, construction material and structure, size, and medical use was determined by contacting a local surgical suture and orthopedic implant manufacturer and utilizing publicly available manufacturer websites, which provide catalogs and specific product details. This research was one of many lines of evidence used to establish the positive identification of a 47‐year‐old male.  相似文献   
388.
Abstract: Samples containing the toxic castor bean protein ricin have been recently seized in connection with biocriminal activity. Analytical methods that enable investigators to determine how the samples were prepared and to match seized samples to potential source materials are needed. One commonly described crude ricin preparation method is acetone extraction of crushed castor beans. Here, we describe the use of solid‐phase microextraction and headspace analysis to determine whether castor beans were processed by acetone extraction. We prepared acetone‐extracted castor bean mash, along with controls of unextracted mash and mash extracted with nonacetone organic solvents. Samples of acetone‐extracted mash and unextracted mash were stored in closed containers for up to 109 days at both room temperature and ?20°C, and in open containers at room temperature for up to 94 days. Acetone‐extracted bean mash could consistently be statistically distinguished from controls, even after storage in open containers for 94 days.  相似文献   
389.
390.

Abstract:

An alarming number of drownings occur in lifeguarded swimming areas, where one might presume swimmers are protected from injury. One reason drownings occur in lifeguarded swimming areas is because lifeguard surveillance is a highly difficult task. Observational research suggests lifeguards are usually alert, but researchers also report egregious examples of inattention. We offer three strategies that have initial empirical support to reduce risk of drowning at lifeguarded swimming areas: (a) regular training to help lifeguards recognize they are vulnerable to drowning events and to raise their confidence; (b) regular practice via simulated emergency responses, and (c) addressing staff schedules so lifeguards can devote full attention to protecting swimmer safety while on duty. ‎  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