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   682篇
  免费   32篇
各国政治   31篇
工人农民   94篇
世界政治   36篇
外交国际关系   20篇
法律   391篇
中国政治   18篇
政治理论   121篇
综合类   3篇
  2023年   6篇
  2022年   6篇
  2021年   6篇
  2020年   18篇
  2019年   21篇
  2018年   40篇
  2017年   31篇
  2016年   34篇
  2015年   35篇
  2014年   27篇
  2013年   72篇
  2012年   26篇
  2011年   39篇
  2010年   28篇
  2009年   35篇
  2008年   32篇
  2007年   41篇
  2006年   34篇
  2005年   27篇
  2004年   24篇
  2003年   22篇
  2002年   22篇
  2001年   9篇
  2000年   7篇
  1999年   5篇
  1998年   7篇
  1997年   4篇
  1996年   6篇
  1995年   6篇
  1994年   7篇
  1993年   2篇
  1992年   8篇
  1991年   3篇
  1990年   4篇
  1989年   1篇
  1988年   5篇
  1987年   2篇
  1986年   1篇
  1985年   5篇
  1983年   2篇
  1981年   2篇
  1980年   2篇
排序方式: 共有714条查询结果,搜索用时 15 毫秒
541.
American Journal of Criminal Justice - People involved with the criminal justice system in the United States are disproportionately low-income and indebted. The experience of incarceration...  相似文献   
542.
The purpose of this study was to examine the relationships of attachment security and psychopathology in an adult sample of high-risk abuse survivors. Attachment security was conceptualized in terms of two underlying dimensions, the working models of self and other. A sample of 66 survivors of childhood maltreatment completed measures of abuse history, attachment style, and psychopathology. Results demonstrated a strong relationship between a negative view of self and reported psychopathology, regardless of whether attachment was conceptualized continuously or categorically. Findings also revealed that the association of negative view of self and psychopathology was much stronger than that of negative view of other and psychopathology.  相似文献   
543.
Cocaine (COC) is a highly addictive plant alkaloid expressing strong psychostimulatory effect. It has no medical use in equine veterinary practice. The contamination of the environment with cocaine such as its presence on the US paper currency has been reported few times. There are anecdotal reports of low benzoylecgonine (BE) concentrations (usually much less than 100 ng/mL) being found in urine of race horses. In order to protect horsemen against harsh penalties associated with the presence of trace amounts of BE in horse urine as a result of environmental contamination, in February 2005 the Illinois Racing Board issued new medication rules that established the threshold level of 150 ng/mL for BE in equine urine. The penalties associated with this rule provide for increasing fines ($250, $500, $1000) with successive positive reports against a trainer for levels of BE below 150 ng/mL. A total of 19,315 urine samples were collected over the 2-year period of time from winning horses (both harness and thoroughbred) at race tracks in Illinois for routine drug screening (ELISA). The presence of BE was confirmed by GC/MS in 28 urine samples (0.14%). The concentration range for BE in harness horses (21 detections) was < 5-91 ng/mL, and for thoroughbred (seven detections) was 7-52 ng/mL. To date, the laboratory has not reported concentrations of BE that exceed the established threshold concentration of 150 ng/mL.  相似文献   
544.
This study examined a large sample of women recruited out of court at the time they received a civil protective order to better understand relationship status after obtaining a protective order (PO) and factors associated with protective order violations. Results are consistent with prior research suggesting that the protective order may be the impetus in separating from the abusive partner for some women, while for other women it is part of the separation process. Results also indicated that five out of ten women who did not continue a relationship experienced a violation while seven out of ten women who did continue a relationship with the PO partner experienced a violation. The majority of women felt safer and reported they believed the protective order was effective 13 months post-PO, regardless of relationship status. Furthermore, stalking played a significant role in separation from an abusive relationship and in protective order violations regardless of relationship status. Implications for practice and future research are discussed.
TK LoganEmail:
  相似文献   
545.
Accurate assessment of attitudes about intimate partner violence is important for evaluation of prevention and early intervention programs. Assessment of attitudes about cross-gender interactions is particularly susceptible to bias because it requires specifying the gender of the perpetrator and the victim. As it is likely that respondents will tend to identify with the same-gender actor, items and scales assessing attitudes about intimate partner violence may not have equivalent measurement properties for male and female respondents. This article examines data from 2,575 high school students who participated in a teen-dating violence intervention study. The majority of participants were Latino (91%), and the sample was nearly evenly split with respect to gender (51% female). Items from two scales (boy-on-girl violence, 4 items; girl-on-boy violence, 5 items) reflecting teens' attitudes about dating violence were calibrated with the graded item response theory (IRT) model and evaluated for differential item functioning (DIF) by gender. A total of three items, two from the girl-on-boy violence scale and one from the boy-on-girl violence scale, were identified as functioning differently for girls and boys. In all cases where DIF was detected, the item's attitudinal statement was easier to accept for the gender group that was portrayed as victim rather than perpetrator. For both scales, accounting for the identified DIF influenced inferences about the magnitude of mean differences in attitudes between boys and girls. These results support the use of IRT scores that account for DIF to minimize measurement error and improve inferences about gender differences in attitudes about dating violence.  相似文献   
546.
Abstract: Vegetable oils undergo burning, self‐heating, and spontaneous ignition, resulting in their presence in fire debris. As these processes can affect the fatty acid content of vegetable oils, it is important that debris be properly handled in order to obtain reliable and informative data. This research investigated changes in vegetable oil content as a result of storage conditions and different types of burning. Material spiked with vegetable oils and burned was stored under various long‐term conditions, and debris was tested by heating overnight using passive headspace concentration. Results indicated that refrigeration is ideal for fire debris samples suspected of containing vegetable oils and that including passive headspace concentration in the analytical scheme would not affect oils. Spontaneous ignition experiments were conducted to compare the effects of various burning processes on vegetable oil content. Vegetable oils that experienced nonpiloted ignition, self‐heating, and spontaneous ignition produced noticeably different chromatograms from those that underwent piloted ignition.  相似文献   
547.
Abstract: The PrepFiler? Forensic DNA Extraction Kit enables isolation of genomic DNA from a variety of biological samples. The kit facilitates reversible binding of DNA with magnetic particles resulting in high DNA recovery from samples with very low and high quantities of biological materials: 0.1 and 40 μL of human blood (donor 2) provided 14 and 2883 ng of DNA, respectively. Following the revised SWGDAM guidelines, performance of the developed method was investigated using different sample types including saliva on swabs, semen stains on cotton fabric, samples exposed to environment, samples with polymerase chain reaction (PCR) inhibitors, blood stains (on denim, cotton cloth, and FTA® paper), and touch evidence‐type samples. DNA yields for all samples tested were equal or better than those obtained by both phenol–chloroform extraction and commercial kits tested. DNA obtained from these samples was free of detectable PCR inhibitors. Short tandem repeat profiles were complete, conclusive, and devoid of PCR artifacts.  相似文献   
548.
Abstract:  This paper presents how jewelry modeling waxes are used in the preparation of tool mark standards from exemplar tools. We have previously found that jewelry modeling waxes are ideal for preparing test tool marks from exemplar tools. In this study, simple methods and techniques are offered for the replication of accurate, highly detailed tool mark standards with jewelry modeling waxes. The techniques described here demonstrate the conditioning and proper use of jewelry modeling wax in the production of tool mark standards. The application of each test tool's working surface to a piece of the appropriate wax in a manner consistent with the tool's design is clearly illustrated. The resulting tool mark standards are exact, highly detailed, 1:1, negative impressions of the exemplar tool's working surface. These wax models have a long shelf life and are suitable for use in microscopic examination comparison of questioned and known tool marks.  相似文献   
549.
This review systematically searched UK academic and grey literature in relation to mother and child separation in prison. Attachment theory is referred to in current prison policy for mothers and could provide a framework linking policy and practice. Reviewing grey literature provided an opportunity to explore practice-based literature. Twenty-four academic papers and 51 grey documents were reviewed. Use of attachment theory in the academic literature varied according to discipline, ranging from extensive use to no use. There was greater use of attachment theory in the grey literature. Despite linguistic differences, all documents highlighted the detrimental impact of separation on imprisoned mothers. However, specificity was lacking regarding support for mothers, and staff needs were overlooked. Given its use across the sparse research and practice literature, and its basis for policy, attachment theory could underpin theoretically informed support for imprisoned mothers separated from their infants and staff who support them.  相似文献   
550.
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