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   303篇
  免费   27篇
  2023年   5篇
  2021年   3篇
  2020年   6篇
  2019年   6篇
  2018年   10篇
  2017年   8篇
  2016年   10篇
  2015年   13篇
  2014年   13篇
  2013年   44篇
  2012年   11篇
  2011年   6篇
  2010年   13篇
  2009年   5篇
  2008年   9篇
  2007年   9篇
  2006年   8篇
  2005年   8篇
  2004年   6篇
  2003年   8篇
  2002年   6篇
  2001年   6篇
  1999年   2篇
  1998年   2篇
  1997年   3篇
  1996年   6篇
  1995年   7篇
  1994年   4篇
  1993年   8篇
  1992年   7篇
  1991年   2篇
  1990年   5篇
  1989年   3篇
  1988年   6篇
  1986年   9篇
  1985年   4篇
  1984年   5篇
  1983年   4篇
  1982年   4篇
  1980年   3篇
  1979年   2篇
  1977年   2篇
  1976年   2篇
  1975年   2篇
  1974年   4篇
  1973年   3篇
  1972年   4篇
  1971年   4篇
  1969年   4篇
  1968年   2篇
排序方式: 共有330条查询结果,搜索用时 21 毫秒
111.
Transplantation continues to push the frontiers of medicine into domains that summon forth troublesome ethical questions. Looming on the frontier today is human facial transplantation. We develop criteria that, we maintain, must be satisfied in order to ethically undertake this as-yet-untried transplant procedure. We draw on the criteria advanced by Dr. Francis Moore in the late 1980s for introducing innovative procedures in transplant surgery. In addition to these we also insist that human face transplantation must meet all the ethical requirements usually applied to health care research. We summarize the achievements of transplant surgery to date, focusing in particular on the safety and efficacy of immunosuppressive medications. We also emphasize the importance of risk/benefit assessments that take into account the physical, aesthetic, psychological, and social dimensions of facial disfiguration, reconstruction, and transplantation. Finally, we maintain that the time has come to move facial transplantation research into the clinical phase.  相似文献   
112.
Rational emotive behaviour therapy (REBT) does not possess a measure of rational and irrational beliefs that meets internationally recognised standards for acceptable psychometric properties. Without such a measure the theory/practice of REBT cannot be rigorously evaluated, thus undermining its scientific veracity. The current study investigates the validity and reliability of a recently developed measure of rational and irrational beliefs: the Attitudes and Belief Scale 2-Abbreviated Version (ABS-2-AV). University students from three countries completed the ABS-2-AV (N = 397). An alternative models framework using confirmatory factor analysis indicated that a theoretically consistent eight-factor model of the ABS-2-AV provided the best fit of the data. A number of post hoc modifications were required in order to achieve acceptable model fit results, and these modifications revealed important methodological limitations with the ABS-2-AV. Results indicated that the validity of the ABS-2-AV was undermined due to items measuring both the psychological process of interest (rational and irrational beliefs) and the context in which these beliefs processes are presented. This is a serious methodological limitation of the ABS-2 and all questionnaires derived from it, including the ABS-2-AV. This methodological limitation resulted in the ABS-2-AV possessing poor internal reliability. These limitations are discussed in relation to the broader REBT literature and the impact such problems have on research and practice. A call is made for REBT researchers to come together to develop a “gold standard” method of assessing rational and irrational beliefs that meets international standard for psychometric excellence.  相似文献   
113.
The partisan realignment of the White South, which transformed this region from being solidly Democratic to being the base of the Republican Party, has been the focus of much scholarship. Exactly how it occurred is unclear. Widespread individual‐level attitude changes would be contrary to the well‐known within‐person stability of party identification. However, according to the impressionable‐years hypothesis, events that occur during adolescence and early adulthood may have a lasting impact on later political attitudes. This would suggest that cohort replacement may be driving partisan realignment. We test this possibility using data from the American National Election Studies from 1960 to 2008. Consistent with the impressionable‐years hypothesis, Southern Whites from the pre‐Civil Rights cohort (born before 1936) maintained their Democratic Party identification longer than their younger counterparts. However, all cohorts in the South have changed their partisan attitudes at comparable rates over time, contrary to the impressionable‐years hypothesis. These data suggest that the partisan realignment of the South was driven by both cohort replacement and within‐cohort attitude change. More targeted case studies of older cohorts living through the civil rights era, and of younger cohorts in the post‐Reagan era, yield results generally consistent with the impressionable‐years hypothesis. More generally, our findings suggest that very large scale events are required to disrupt the normal continuity of party identification across the life span.  相似文献   
114.
This experiment investigated the combined use of visual prompts, daily feedback, and rewards to reduce electricity consumption in a university residential hall. After a 17-day baseline period, the experimental intervention was introduced in the intervention hall, and no change was made in the control hall. Energy usage decreased in the intervention hall, but energy usage did not change appreciably in the control hall. In the intervention hall, mean daytime and nighttime savings were 16.2% and 10.7%, respectively, compared to savings of 3.8% (day) and 6.5% (night) in the control hall.  相似文献   
115.
How can one discover the ethical issues associated with nanotechnologies? One heuristic is to tend closely to the ethical reflections of lay publics and the ways in which these are informed by experience with technological innovation, technology governance, and the (broken) promises of visionary science and technology. A close collaboration between social scientists and philosophers took this heuristic to its limits: On the one hand, it achieved remarkably fine–grained insights into public reflection about nanotechnologies. On the other hand, a philosophical analysis of these reflections makes apparent that there is a profound disconnect between the lay ethics rooted in public talk and the ethical and normative commitments that are embedded in nanotechnological research programs and practices. Accordingly, critical engagement with the ways in which ordinary people try to make sense of nanotechnologies constitutes a novel heuristic for the discovery of ethical issues. This introduction and the subsequent four papers show this heuristic at work.  相似文献   
116.
In a program of research assessing the validity of the balloon analogue risk task (BART; C. W. Lejuez et al., 2002) as a measure of risk taking, the BART was administered to a sample of inner-city drug users in residential treatment (n = 76). Construct validity of the BART was evaluated by measuring risk-taking behavior and 3,4-methylenedioxymethamphetamine (MDMA) use while controlling for self-reported impulsivity, sensation seeking, polysubstance use, and demographic variables. Supporting the construct validity of the BART, while controlling for interrelated variables in the context of logistic regression analyses, (BART) risk-taking propensity accounted for significant incremental variance in differentiating MDMA users from non-users. BART scores, polysubstance use, and younger age were most associated with MDMA use, and together these variables were associated with 91% classification accuracy in predicting MDMA use.  相似文献   
117.
Participants indicated whether a small dot was located near the top or bottom pole of a rotated object. Response times increased as a function of object orientation more for top trials than for bottom trials. The interaction between orientation and response was shown to be due to a relationship between response times and the dot's height on the screen. The orientation effect was influenced, positively and negatively, by a vertical arrangement of the response keys depending on whether the upper or lower key was used for the top response. Horizontal key placement produced an intermediate orientation effect, with asymmetries of about 180 degrees depending on which hand was used for top responses. This task appears to reflect spatial stimulus-response compatibilities more than object processing.  相似文献   
118.
119.
Phil Dowe 《Erkenntnis》1992,37(2):179-196
Process theories of causality seek to explicate causality as a property of individual causal processes. This paper examines the capacity of such theories to account for the asymmetry of causation. Three types of theories of asymmetry are discussed; the subjective, the temporal, and the physical, the third of these being the preferred approach. Asymmetric features of the world, namely the entropic and Kaon arrows, are considered as possible sources of causal asymmetry and a physical theory of asymmetry is subsequently developed with special reference to the questions of objectivity and backwards causation.An earlier draft of this paper was read at the A.A.P. conference at the University of Sydney, June, 1990. The author would like to thank Peter Menzies and Huw Price for their helpful comments.  相似文献   
120.
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