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   443篇
  免费   19篇
  2024年   2篇
  2023年   6篇
  2022年   4篇
  2021年   5篇
  2020年   14篇
  2019年   21篇
  2018年   21篇
  2017年   31篇
  2016年   23篇
  2015年   12篇
  2014年   17篇
  2013年   52篇
  2012年   21篇
  2011年   32篇
  2010年   17篇
  2009年   13篇
  2008年   20篇
  2007年   19篇
  2006年   24篇
  2005年   14篇
  2004年   10篇
  2003年   13篇
  2002年   10篇
  2001年   6篇
  2000年   4篇
  1999年   3篇
  1998年   2篇
  1997年   2篇
  1996年   2篇
  1995年   3篇
  1994年   3篇
  1993年   1篇
  1991年   7篇
  1990年   3篇
  1989年   2篇
  1988年   2篇
  1986年   4篇
  1985年   1篇
  1984年   3篇
  1983年   2篇
  1982年   2篇
  1981年   1篇
  1979年   1篇
  1978年   1篇
  1976年   2篇
  1975年   1篇
  1966年   1篇
  1965年   2篇
排序方式: 共有462条查询结果,搜索用时 15 毫秒
341.
OBJECTIVE: College may represent an untapped opportunity to reach the growing number of student smokers who are at risk of progressing toward regular smoking. The aim of this study was to test the efficacy of a theory-based experiential intervention for increasing motivation to quit smoking and reducing smoking behavior. DESIGN: This study used a 3-arm, randomized design to examine the efficacy of an experiential secondary prevention intervention. The control groups included a traditional didactic smoking intervention and an experiential intervention on nutrition. MAIN OUTCOME MEASURES: The 2 primary dependent variables were change in self-reported intention to quit smoking, measured pre- and postintervention, and change in smoking behavior over the month following the intervention. RESULTS: As hypothesized, the experiential smoking intervention was more effective than either control group in increasing immediate motivation to quit, but the effect was found only among female participants. At 1-month follow-up, both smoking interventions produced higher rates of smoking cessation and reduction than did the nutrition control condition. CONCLUSION: Findings support the potential efficacy of an intensive experiential intervention for female smokers.  相似文献   
342.
Even at the end of life, testing cancer patients for inherited susceptibility may provide life-saving information to their relatives. Prior research suggests palliative care inpatients have suboptimal understanding of genetic importance, and testing may be underutilized in this clinical setting. These conclusions are based on limited research. This study aimed to estimate genetic testing prevalence among high-risk palliative care patients in a National Cancer Institute-designated comprehensive cancer center. We also aimed to understand these patients’ understanding of, and attitudes toward, hereditary cancer testing and DNA banking. Palliative care in-patients with cancer completed structured interviews, and their medical records were reviewed. Among patients at high risk for hereditary cancer, we assessed history of genetic testing/DNA banking; and related knowledge and attitudes. Among 24 high-risk patients, 14 (58.3%) said they/their relatives had genetic testing or they had been referred for a genetics consultation. Of the remaining 10 patients, seven (70%) said they would “probably” or “definitely” get tested. Patients who had not had testing were least concerned about the impact of future testing on their family relationships; two (20%) said they were “extremely concerned” about privacy related to genetic testing. Of patients without prior testing, five (50%) said they had heard or read “a fair amount” about genetic testing. No high-risk patients had banked DNA. Overall, 23 (95.8%) said they had heard or read “almost nothing” or “relatively little” about DNA banking. Written materials and clinician discussion were most preferred ways to learn about genetic testing and DNA banking. Overall, this study demonstrates underutilization of genetics services at the end of life continues to be problematic, despite high patient interest.  相似文献   
343.
Family health history (FHx) is one of the most important pieces of information available to help genetic counselors and other clinicians identify risk and prevent disease. Unfortunately, the collection of FHx from patients is often too time consuming to be done during a clinical visit. Fortunately, there are many electronic FHx tools designed to help patients gather and organize their own FHx information prior to a clinic visit. We conducted a review and analysis of electronic FHx tools to better understand what tools are available, to compare and contrast to each other, to highlight features of various tools, and to provide a foundation for future evaluation and comparisons across FHx tools. Through our analysis, we included and abstracted 17 patient-facing electronic FHx tools and explored these tools around four axes: organization information, family history collection and display, clinical data collected, and clinical workflow integration. We found a large number of differences among FHx tools, with no two the same. This paper provides a useful review for health care providers, researchers, and patient advocates interested in understanding the differences among the available patient-facing electronic FHx tools.  相似文献   
344.
The collection of very large text sources has revolutionized the study of natural language, leading to the development of several models of language learning and distributional semantics that extract sophisticated semantic representations of words based on the statistical redundancies contained within natural language (e.g., Griffiths, Steyvers, & Tenenbaum, 2007 ; Jones & Mewhort, 2007 ; Landauer & Dumais, 1997 ; Mikolov, Sutskever, Chen, Corrado, & Dean, 2013 ). The models treat knowledge as an interaction of processing mechanisms and the structure of language experience. But language experience is often treated agnostically. We report a distributional semantic analysis that shows written language in fiction books varies appreciably between books from the different genres, books from the same genre, and even books written by the same author. Given that current theories assume that word knowledge reflects an interaction between processing mechanisms and the language environment, the analysis shows the need for the field to engage in a more deliberate consideration and curation of the corpora used in computational studies of natural language processing.  相似文献   
345.
346.
This article describes the process of developing and validating an immigrant community integration factor score from three different indicators based on three theories: human security, needs assessment, and realistic conflict. Over twenty days in May/June of 2015, fifty-seven semi-structured interviews were conducted with Bissau-Guinean immigrants on Boa Vista and Santiago Islands of Cabo Verde in West Africa to pilot test this instrument. Questions asked measured study participants’ needs assessment, human security levels, and conflict experiences. These findings demonstrate the applicability of combining these three indicators into an aggregate integration score, validated through confirmatory factor analysis using partial least squares path modeling. This article shows how the immigrant community integration factor score accounts for the situational context, in this case, increasing population and resource pressures leading to tension, conflict, and outbursts of violence before various institutional and policy interventions calmed the situation. While this study serves as a test case, we are confident that the validated integration score can serve as an effective proxy for measuring the level of comprehensive community integration not along individual acculturation indices, but according to broader human security and conflict potential at the community level.  相似文献   
347.
Overgeneral autobiographical memory (OGM) has been established as a risk factor for depression in both youth and adults, but questions remain as to how OGM develops. Although theorists have proposed that the experience of stressful life events may contribute to the development of OGM, no studies have examined the impact of negative life events on prospective changes in OGM. The goal of the current study was to address this gap in the literature. Participants included 251 mothers and their biological children (aged 8–14 years old at the initial assessment). Using a multi-wave prospective design with assessments every 6 months for 2 years, we found that episodic life stress predicted prospective decreases in youths’ autobiographical memory specificity to positive, but not negative, cues. This study supports theories proposing that negative life events may contribute to the development of OGM, but suggest that, in youth, the impact of life stress on OGM may be specific to positive rather than negative memories.  相似文献   
348.
Previous research has found significant impacts of daylight and views on the cognitive function of office workers. In this study, we use scores on decision-making performance to estimate the annual economic potential of optimizing daylighting and views in U.S. offices. Cognitive scores were compared against over 100,000 previous test scores to obtain the distributional shift in cognitive performance when working in an office with optimized daylighting and views as opposed to an office with traditional blinds. These changes in performance were then compared to compensation data from the Bureau of Labor Statistics. Office workers shifted on average from the 52nd percentile to 65th percentile, equivalent to a $11,809 difference in salary per person per year. When conservatively accounting for the number of employees working within 15 ft of a window with blinds, optimizing daylight and views in U.S. offices has the potential to generate $352B ($240B–$464B), or 1.7% of the 2018 U.S. gross domestic product (GDP), in additional productivity. These findings suggest that building developers, architects and tenants should give additional attention to daylight design and façade technology as they consider new building construction, renovation and leasing options.  相似文献   
349.
350.
The current study examined sensitivity in detecting emotional faces among children of depressed and non-depressed mothers. A second goal was to examine the potential moderating role of the oxytocin receptor gene (OXTR rs53576), which has been linked to emotion recognition in the past. Participants included 247 children (ages 8–14). Children completed a forced choice emotion identification task. Maternal history of major depressive disorder during children's lives was associated with children's sensitivity in detecting emotional faces among children homozygous for the OXTR rs53576 G allele, but not among carriers of the A allele. Among G homozygotes, children of depressed mothers exhibited increased sensitivity in detecting sad faces, and reduced sensitivity in detecting happiness, compared to children of non-depressed mothers.  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