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   248篇
  免费   7篇
各国政治   11篇
工人农民   51篇
世界政治   6篇
外交国际关系   9篇
法律   121篇
中国政治   5篇
政治理论   51篇
综合类   1篇
  2023年   2篇
  2021年   1篇
  2020年   3篇
  2019年   3篇
  2018年   5篇
  2017年   10篇
  2016年   4篇
  2015年   4篇
  2014年   11篇
  2013年   37篇
  2012年   14篇
  2011年   10篇
  2010年   8篇
  2009年   15篇
  2008年   13篇
  2007年   12篇
  2006年   13篇
  2005年   7篇
  2004年   8篇
  2003年   10篇
  2002年   7篇
  2001年   4篇
  2000年   4篇
  1999年   4篇
  1998年   4篇
  1997年   6篇
  1996年   5篇
  1995年   2篇
  1994年   2篇
  1993年   3篇
  1992年   3篇
  1991年   2篇
  1990年   3篇
  1989年   2篇
  1987年   2篇
  1986年   1篇
  1985年   2篇
  1982年   3篇
  1981年   2篇
  1978年   2篇
  1977年   1篇
  1973年   1篇
排序方式: 共有255条查询结果,搜索用时 15 毫秒
121.
Prior research has indicated that low‐income neighborhoods in urban regions throughout the United States have limited access to healthy food, which partly explains the prevalence of diet‐related diseases. Our study provides new evidence on the relationship between access, prices of healthy food, and key demographic factors in Hillsborough County, Florida. The research team completed 65 surveys of grocery and convenience stores regarding availability and prices of 11 food items included in the Nutrition Environment Measures Survey in Stores (NEMS‐S). Results from the regression analysis indicate that affordable healthy food is more likely to be found in grocery stores than in convenience stores. There is no significant evidence, however, that low‐income neighborhoods have less access to healthy food than the not‐low‐income ones. We also observe significant price differences among types of stores but not in grocery‐to‐convenience store ratios among income groups, suggesting that low‐income families are not exposed to higher food prices.  相似文献   
122.
Abstract

Limited scholarly studies have been conducted on transit advertising in general, but even more so in South Africa. The purpose of the current study was to examine commuters’ cognitive responses to minibus taxi advertising by measuring their: (1) noting of minibus taxi advertising; and (2) recall of elements in minibus taxi advertisements. A survey was administered by trained fieldworkers to a quota-based sample of 398 regular minibus taxi commuters at a major taxi rank in Mbombela, Mpumalanga, South Africa. The results revealed that minibus taxi advertising has the potential to attract commuters’ attention, since the vast majority of the respondents regularly note advertisements on passing minibus taxis. The findings also revealed that some sub-groups in the sample demonstrated different cognitive responses. It was furthermore found that the commuting respondents typically recalled visual cues, colours and branding elements of minibus taxi advertising. The unique contribution of the study is that it is one of the first to examine the effectiveness of minibus taxi advertising media on a cognitive level. Thus, from an industry perspective, the study can guide marketers, advertisers and managers in grasping minibus taxi advertising in order to make more effective use of this unique out-of-home (OOH) advertising media platform for their advertising purposes.  相似文献   
123.
In 1973, the Northern Territory (NT) criminal law relating to abortion was reformed. The NT was one of only two Australian jurisdictions where the 1970s liberalisation of abortion was enabled by legislative reform. Unlike the 1969 South Australian reform, the NT bill was sponsored by a female, and feminist, parliamentarian, Dawn Lawrie, assisted by a small group of supporters. This article recovers the narrative of this pioneering reform achieved in a place dominated by white men. It argues that this achievement was enabled by the NT’s individualistic culture, its history of white women’s activism and the mood for progressive change in 1970s Australia. It contextualises the reform by keeping the position of Indigenous women, including the public opposition of some to abortion reform, clearly in view, thus keeping race at the centre of the analysis of liberal feminist reforms and of white feminism in the NT in the early 1970s.  相似文献   
124.
Research on stasis or change in public opinion toward health, health policy, and medical care tends to focus on short-term dynamics and to emphasize the impact of discrete messages communicated by individual speakers in particular situations. This focus on what we term "situational framing," though valuable in some respects, is poorly equipped to assess changes that may occur over the longer term. We focus, instead, on "structural framing" to understand how institutionalized public health and health care policies impact public opinion and behavior over time. Understanding the dynamics of public opinion over time is especially helpful in tracking the political effects of the Patient Protection and Affordable Care Act of 2010 as it moves from the debate over its passage to its implementation and operation.  相似文献   
125.
126.
127.
The organic components of gunshot residue (OGSR, also called firearms discharge residue (FDR) or cartridge discharge residue (CDR)) have been studied and discussed in the literature. These residues, consisting of particulates such as burned and unburned powder as well as molecular compounds, are rarely used in casework except for purposes such as shooting reconstructions. Molecular compounds that survive the firing event or that are created as a result of the firing event could, with focused research and development, open a new avenue for forensic gunshot residue analysis. In this study, the persistence of organic gunshot residue was evaluated using diphenylamine (DPA) as a target analyte and ion mobility spectrometry (IMS) as the detection system. Samples were collected from hands using a solvent swabbing technique and the swab was analyzed using direct thermal desorption for sample introduction into the IMS. OGSR was found to persist for at least 4h. Although DPA is a widely used industrial compound, analysis of numerous blank and background samples (n~100) did not show any significant response for DPA using this detector. Variations were noted among individuals and as such, the data set does not support estimation of a half-life as has been done for traditional primer residues. No secondary transfers were observed, suggesting the possibility of skin adhesion via interactions between the lipophilic organic compounds and skin lipids. IMS proved valuable as a means of generating patterns for forensic pattern matching and shows promise as a screening tool applied to firearms discharge.  相似文献   
128.
Travelers are a migratory subgroup of homeless youth who may be especially prone to engaging in risky behavior. This study compared the substance use and sexual behavior of young homeless travelers and non-travelers to evaluate the extent and possible sources of travelers’ increased risk. Data came from face-to-face interviews with 419 homeless youth (36.6% female, 34.0% white, 23.9% African American, and 20.0% Hispanic) between the ages of 13 and 24 years (M = 20.1 years, SD = 2.5) who were randomly sampled from 41 shelters, drop-in centers, and street sites in Los Angeles. Travelers were almost twice as likely as non-travelers to exhibit recent heavy drinking, 37% more likely to exhibit recent marijuana use, and five times as likely to have injected drugs. Travelers also had more recent sex partners and were more likely to report having casual or need-based sexual partners and combining sex with substance use. Mediation analyses suggest that travelers’ deviant peer associations and disconnection to conventional individuals and institutions may drive their elevated substance use. Differences in sexual risk behaviors are likely attributable to demographic differences between the two groups. Overall, these differences between travelers and non-travelers suggest different service needs and the need for different service approaches.  相似文献   
129.
The present study examines gender differences in bullying in high school. Unique contributions include comparisons of both victimization and perpetration rates across four subtypes of bullying: physical, verbal, relational, and cyber. Further, as we conceptualize bullying within the larger framework of literature on social rejection, we also address whether there are gender differences in experiencing social rejection–in the form of bullying–and responding with aggression, as opposed to asocial or prosocial behavior. The literature yields mixed findings across these three questions (i.e., gender differences in experiences with victimization and perpetration and responses to those experiences), suggesting sample variations (Archer Review of General Psychology, 8(4), 291–322, 2004; Archer & Coyne Personality and Social Psychology Review, 9, 212–230, 2005; Card, Stucky, Sawalani, & Little Child Development, 79, 1185–1229, 2008). Thus, we explored experiential differences in our sample, and hypothesized based on the tend and befriend model (Taylor et al., 2000) that girls would be more likely than boys to respond to bullying with prosocial behaviors. With regard to victimization and perpetration differences, we found that male students both experienced and perpetrated significantly more physical bullying. Boys were also significantly more likely to report experiencing verbal bullying than girls. No significant differences emerged for relational or cyber bullying. With regard to responses, social withdrawal was more common than aggressive responding, but consistent with the tend and befriend model, girls chose prosocial responses significantly more than boys, whereas boys were just as likely to choose antisocial responding as prosocial responding. These results suggest that gender should be considered in studies addressing the question of when experiences with rejection–in its many forms–results in antisocial versus prosocial behavior.  相似文献   
130.
Adolescent mothers of 8- to 14-month-old infants gave fewer correct responses on the Developmental Milestones Survey (DMS) and were less accurate in predicting whether or not their infants would pass Bayley items than adult mothers of same-aged infants. Adolescent mothers were more likely to underestimate their infant's performance if the mothers received lower scores on the DMS, especially if they were likely to guess too young an age when they missed DMS items. Adult mothers, on the other hand, were more likely to underestimate their infant's performance if the mothers were likely to guess too old an age when they missed DMS items. Some adolescent mothers thus expect too little too late from their own infant and too much too soon from the average infant. These mothers may fail to encourage their infant's development and may perceive their infant as less competent than other infants because of these expectations.This article is based on a master's thesis completed by the second author. An earlier version of these findings was presented at the meeting of the Society for Research in Child Development, New Orleans, Louisiana, March 1993.Received Ph.D., from Michigan State University. Research interests include adults' perceptions of infants and infant emotional regulation.Received M.A. from West Virginia University. Research interests include adolescent parenting and infant social development.  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