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   237篇
  免费   13篇
管理学   23篇
人口学   11篇
丛书文集   3篇
理论方法论   33篇
社会学   174篇
统计学   6篇
  2023年   2篇
  2021年   1篇
  2020年   6篇
  2019年   5篇
  2018年   5篇
  2017年   11篇
  2016年   12篇
  2015年   5篇
  2014年   8篇
  2013年   33篇
  2012年   9篇
  2011年   12篇
  2010年   7篇
  2009年   3篇
  2008年   11篇
  2007年   15篇
  2006年   14篇
  2005年   8篇
  2004年   3篇
  2003年   7篇
  2002年   7篇
  2001年   4篇
  2000年   10篇
  1999年   9篇
  1998年   7篇
  1997年   5篇
  1996年   3篇
  1995年   1篇
  1994年   2篇
  1993年   1篇
  1992年   1篇
  1991年   3篇
  1990年   1篇
  1989年   1篇
  1988年   1篇
  1987年   3篇
  1986年   1篇
  1984年   1篇
  1983年   1篇
  1981年   1篇
  1980年   3篇
  1979年   5篇
  1976年   2篇
排序方式: 共有250条查询结果,搜索用时 484 毫秒
231.
232.
233.
Protein recommendations by some professional organizations for young adults engaged in resistance training (RT) are higher than the recommended dietary allowance (RDA), but recommendations for resistance-training older adults (>50 years old) are not well characterized. Some argue that the current RDA is adequate, but others indicate increased protein needs. Although concerns have been raised about the consequences of high protein intake, protein intake above the RDA in older adults is associated with increased bone-mineral density when calcium intake is adequate and does not appear to compromise renal health in older individuals with normal renal function. Individual protein needs for older adults in RT are likely highly variable according to health and training regimen, but an intake of 1.0-1.3 g x kg(-1) x day(-1) should adequately and safely meet the needs of older adults engaged in RT, provided that their energy needs are met.  相似文献   
234.
This study investigated physical activity and fitness of midlife and older rural women. Random-digit dialing was used to recruit 225 women (57.9 +/- 5.6 years old). Self-reported activity (moderate activity, flexibility, and strength) and fitness (body composition, flexibility, strength, and estimated VO(2max)) were assessed. The women demonstrated low daily energy expenditure (30.74 +/- 10.63 kcal x kg(-1) x day(-1)) and estimated VO(2max) (20.12 +/- 7.81 ml x kg(-1) x min(-1)), with 51.5% reporting fair or poor health. Few women reported meeting Healthy People 2010 targets for moderate activity (43.1%), flexibility (28.9%), or strength )14.2%). When classified by estimated VO(2max) into three categories, differences were observed for body-mass index, percent body fat, sit and reach, and timed chair stands, with the poorest performance by those with low cardiorespiratory fitness. Adherence to Healthy People 2010 targets for moderate activity and strengthening was associated with higher cardiorespiratory fitness. These rural women are targets for physical activity interventions because of their sedentary behaviors and low cardiorespiratory fitness.  相似文献   
235.
A survey on experiences with child abuse reporting was obtained from 116 middle and high school counselors and principals across the U.S. Results revealed that counselors throughout their careers had made more reports than principals and perceived themselves to be better trained on child abuse. Those school professionals with fewer years of experience reported more adequate pre-service training. Counselors also failed to report in more instances than principals, citing as deterrents the lack of physical evidence and little faith in child protective services. Most counselors and principals took appropriate action when presented with case examples of child sexual abuse. Recommendations for future research are provided.  相似文献   
236.
Risk analysis is a widely used tool to understand problems in food safety policy, but it is seldom applied to nutrition policy. We propose that risk analysis be applied more often to inform debates on nutrition policy, and we conduct a risk assessment of the relationship of regular carbonated soft drink (RCSD) consumption in schools and body mass index (BMI) as a case study. Data for RCSD consumption in schools were drawn from three data sets: the Continuing Survey of Food Intake by Individuals 1994-1996, 1998 (CSFII), the National Health and Nutrition Examination Survey 1999-2000 (NHANES), and the National Family Opinion (NFO) WorldGroup Share of Intake Panel (SIP) study. We used the largest relationship between RCSD and BMI that was published by prospective observational studies to characterize the maximum plausible relationship in our study. Consumption of RCSD in schools was low in all three data sets, ranging from 15 g/day in NFO-SIP to 60 g/day in NHANES. There was no relationship between RCSD consumption from all sources and BMI in either the CSFII or the NHANES data. The risk assessment showed no impact on BMI by removing RCSD consumption in school. These findings suggest that focusing adolescent overweight prevention programs on RCSD in schools will not have a significant impact on BMI.  相似文献   
237.
The present study examined the impact of viewing condition on accuracy in detecting deception. In Experiment 1, observers saw: 1) a single interview for each subject and then judged whether it was honest or deceptive; or 2) two interviews for each subject, and then judged which one was deceptive. All observers were given the full audiovisual record; they were able to see the face and the entire body and to hear the speech as it was spoken. As predicted, detection accuracy when two interviews were available for comparison was significantly higher than accuracy for a single interview. In both cases, however, mean detection accuracy was not significantly different from chance. In Experiment 2, the impact of viewing order of the two interviews (honest first vs. deception first) was assessed. When honest interviews were shown first, judges' accuracy was significantly greater than when deceptive interviews were shown first, and it was also significantly better than chance. Heuristics such as anchoring and representativeness may account for this phenomenon. Reasons for observers' inability to detect deception in this, and other studies, are discussed.Paul Ekman's work is also supported by a Research Scientist Award from the National Institute of Mental Health (MH 06092) and a previous grant from NIMH (MH11976).  相似文献   
238.
239.
Not all doctors like them, some even ignore them, but nevertheless the use of physician scorecards is growing and the scores may soon be widely available to the general public.  相似文献   
240.
The purpose of this pilot study was to gain a deeper understanding of how adolescents are affected by their mothers' breast cancer and to discover their opinions about how future intervention programs should be designed. Three focus groups were conducted with a total of 10 adolescents. Findings indicate that adolescents' lives had been complicated by their mothers' illness, as they often felt burdened with additional roles and responsibilities. Adolescents suggested that future intervention programs should have the following elements: Adolescent group comprised of boys and girls within 4 months of cancer diagnosis; psychoeducation; target coping skills sensitive to girls and boys of different ethnic and racial backgrounds; and after the adolescent groups, have multiple-family therapy groups that promote shared family understanding and open communication between parents and adolescents.  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