全文获取类型
收费全文 | 328篇 |
免费 | 19篇 |
专业分类
各国政治 | 18篇 |
工人农民 | 48篇 |
世界政治 | 37篇 |
外交国际关系 | 16篇 |
法律 | 170篇 |
中国政治 | 3篇 |
政治理论 | 54篇 |
综合类 | 1篇 |
出版年
2023年 | 3篇 |
2022年 | 1篇 |
2020年 | 4篇 |
2019年 | 7篇 |
2018年 | 13篇 |
2017年 | 14篇 |
2016年 | 21篇 |
2015年 | 12篇 |
2014年 | 10篇 |
2013年 | 50篇 |
2012年 | 7篇 |
2011年 | 12篇 |
2010年 | 5篇 |
2009年 | 16篇 |
2008年 | 14篇 |
2007年 | 17篇 |
2006年 | 14篇 |
2005年 | 6篇 |
2004年 | 8篇 |
2003年 | 6篇 |
2002年 | 7篇 |
2001年 | 12篇 |
2000年 | 6篇 |
1999年 | 6篇 |
1998年 | 5篇 |
1997年 | 4篇 |
1996年 | 5篇 |
1995年 | 3篇 |
1994年 | 4篇 |
1993年 | 3篇 |
1992年 | 3篇 |
1991年 | 5篇 |
1990年 | 2篇 |
1989年 | 2篇 |
1988年 | 4篇 |
1987年 | 4篇 |
1986年 | 2篇 |
1985年 | 2篇 |
1984年 | 3篇 |
1983年 | 3篇 |
1982年 | 2篇 |
1981年 | 3篇 |
1980年 | 3篇 |
1979年 | 4篇 |
1978年 | 3篇 |
1976年 | 2篇 |
1975年 | 2篇 |
1974年 | 1篇 |
1973年 | 1篇 |
1968年 | 1篇 |
排序方式: 共有347条查询结果,搜索用时 8 毫秒
261.
A Molecular Method to Detect Wound Cells in Bloodstains Resultant of Sharp Force Injuries for Crime Scene Reconstruction 下载免费PDF全文
Donald J. Johnson M.S. David E. Raymond Ph.D. Cynthia Chen M.S. Matthew Quon M.S. Julian Lis M.S. Mo Re Choi M.S. Christopher Lopez M.S. Aileen Han Ray D. de Leon Ph.D. Cynthia Bir Ph.D. 《Journal of forensic sciences》2018,63(3):842-848
Previous research by the authors on an animal model showed that bloodstains can contain additional information about their somatic origin in the form of wound cells. Bloodstains produced by a gunshot wound to the head were distinguished from bloodstains produced by a gunshot wound to the chest by testing the stains for a brain microRNA marker. In this study, the effectiveness of the technique was examined on blood drops shed externally from a stab wound to the liver of rat carcasses. Specifically, investigations were conducted on the liver microRNA marker, rno‐mir‐122‐3p, with the QIAGEN miScript System, and PCR analysis. Between the two stabbing methods used, 67% of the scalpel blades and 57% of the blood drops tested positive for rno‐mir‐122‐3p; however, other samples tested negative giving inconclusive results as to the wound‐of‐origin. The amount of the liver cells in the bloodstains appeared to be related to the extent of trauma. 相似文献
262.
Cynthia J. Bowling Christine A. Kelleher Jennifer Jones Deil S. Wright 《Public administration review》2006,66(6):823-836
Trends of female access to and presence in responsible governmental positions have gained substantial attention. The research reported here assesses and seeks convergence on several issues associated with gender representation. It extends the research by focusing on top executive posts in American state governments. In particular, the presence of women agency heads in all 50 states is examined from 1970 through 2000 using the lenses of passive representativeness and active representation. The authors find, first, that women face fewer blockages in securing top posts—the glass ceilings are cracking. Second, women's access to peak executive positions springs from more solid educational, career, and organizational foundations or "floors." Third, lateral career movements are penetrating the "walls" surrounding traditionally male-dominated agency types. The essay concludes with a framework for understanding relationships involving passive representativeness, active representation, and representative results. That framework assists in shifting attention toward the consequences of both passive and active representation. 相似文献
263.
Olney CA Livingston JE Fisch S Talamantes MA 《Journal of prevention & intervention in the community》2006,32(1-2):133-147
Medical educators have begun to embrace service-learning as a method for teaching medical students to be more socially responsible, patient-oriented practitioners. However, research documenting the learning outcomes of service-learning in medical education is limited. In this paper, written documents generated through evaluation of a mandatory, structured community service-learning experience were analyzed qualitatively to discover the diverse learning outcomes among 24 students who participated in the experience. Preliminary findings indicate that students developed skills and attitudes directly related to competencies of concern in most U.S. medical programs. These preliminary findings may help other programs articulate learning outcomes for their service-learning programs. Further, these preliminary findings may stimulate more systematic research (qualitative and quantitative) in this area. 相似文献
264.
265.
266.
267.
Cynthia J. Schellenbach Linda D. Monroe Thomas V. Merluzzi 《Journal of family violence》1991,6(1):61-80
The purpose of the present research was to test the effects of situational stress on the components of the cognitive behavioral model, including expectations, interpretations, and behavioral responses to child behaviors (Twentyman et al., 1985). It was predicted that parental abuse potential would be positively related to inappropriate expectations, to negative and internally caused interpretations of child behavior, and to negative parental responses. Second, it was expected that interpretations and responses would be more negative as child abuse potential increased. Sixteen mothers from a child abuse prevention and treatment program completed the Child Abuse Potential Inventory (Milner and Wimberly, 1980) and provided interpretations, evaluations, and responses to a set of vignettes depicting normal child behaviors. The data supported the hypotheses. As abuse potential increased, parent responses were judged as more controlling, punishing, rejecting, and aroused. High stress strengthened the magnitude of these responses. These findings were interpreted within the context of a cognitive behavioral model. 相似文献
268.
269.
270.
The purpose of this study was to examine the relationship between neonatal behavior and prenatal and perinatal risk factors in infants of teenage and older mothers in Puerto Rico and Mainland United States. The sample included approximately 300 newborn infants;half were examined in Puerto Rico, the other half in Florida, using the Brazelton Neonatal Behavioral Assessment Scale. Comparisons by maternal age and the number of obstetrical complications showed that for the Puerto Rican group, infants with fewer obstetrical complications were better able to regulate their crying and active states. Infants of teenage mothers with fewer complications had a higher level of arousal than infants of older mothers with fewer complications. Infant behavior in the Mainland sample did not vary by maternal age or complications. Multiple regression analysis indicated that the combination of biomedical variables significantly predicted neonatal behavior in both cultures. Mother's age was not separately correlated with neonatal behavior, but was repeatedly combined with other variables in the significant regressions. The findings suggest that infants of teenage mothers may differ from infants of older mothers, particularly in the organization of state behavior, and that the effects of maternal age on neonatal behavior are increased in the presence of biological outcome factors.This article is based on a final report to the NICHD Center for Population Research, Contract N01-HD-7283.Received Ph.D. from Michigan State University. Main research interests are determinants of neonatal and infant development, assessment of preterm and at risk infant.Received Ph.D. from Harvard University. Main research interests are sociocultural aspects of development, teenage pregnancy, infant temperament and psychophysiology.Received M.A. from University of Florida. Main research interests are prenatal and prenatal factors on development, maternal obstetric medication, and behavioral teratology. 相似文献