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   1600篇
  免费   50篇
管理学   91篇
民族学   10篇
人口学   143篇
丛书文集   7篇
理论方法论   186篇
综合类   9篇
社会学   1103篇
统计学   101篇
  2023年   5篇
  2021年   11篇
  2020年   46篇
  2019年   45篇
  2018年   55篇
  2017年   80篇
  2016年   42篇
  2015年   36篇
  2014年   37篇
  2013年   326篇
  2012年   50篇
  2011年   62篇
  2010年   36篇
  2009年   34篇
  2008年   46篇
  2007年   53篇
  2006年   57篇
  2005年   55篇
  2004年   74篇
  2003年   35篇
  2002年   46篇
  2001年   38篇
  2000年   14篇
  1999年   25篇
  1998年   21篇
  1997年   21篇
  1996年   11篇
  1995年   12篇
  1994年   17篇
  1993年   18篇
  1992年   10篇
  1991年   21篇
  1990年   19篇
  1989年   18篇
  1988年   14篇
  1987年   20篇
  1986年   12篇
  1985年   13篇
  1984年   13篇
  1983年   17篇
  1982年   7篇
  1981年   10篇
  1980年   9篇
  1978年   11篇
  1977年   5篇
  1976年   9篇
  1975年   4篇
  1974年   5篇
  1973年   5篇
  1971年   4篇
排序方式: 共有1650条查询结果,搜索用时 703 毫秒
901.
The purpose of this study was to use the constructs of the theory of planned behavior (TPB) to gain a better understanding of the factors influencing older adults' participation in strength training. Two hundred men and women age 55 years and older were purposely sampled from seniors' centers in Ontario Canada. Participants completed a TPB questionnaire and reported their current physical activity participation. It was hypothesized that perceived behavioral control followed by attitude would be the strongest determinants of strength-training intentions and that intention would be the strongest determinant of strength-training behavior. Regression analyses revealed that subjective norm and perceived behavioral control explained 42% of the variance in intention and intention explained 40% of the variance in behavior. Gender and current strength-training participation did not significantly moderate the relationship between the TPB variables. The results suggest that interventions targeting subjective norm and perceived control might be helpful in promoting strength-training behavior among older adults.  相似文献   
902.
The purpose of this project was to evaluate the effectiveness of an initial screening and referral process in reducing the impact of musculosketetal injuries among soldiers attending Health Care Specialist training. Musculoskeletal injury among Army Health Care Specialist students have been reported to be approximately 24% for men and 24-30% for women. The highest student visit rate to the troop medical clinic for musculoskeletal injuries, for men and women, occurs during the first week of training. Anecdotal reports indicate that many students arrive for training with existing injuries or symptoms. This project was designed to assess whether formalized early screening, referral, and intervention could 1) identify arriving students who need musculoskeletal injury-related medical attention, 2) reduce the number of students receiving limited duty status during their 10-week training, 3) decrease the total number of limited duty days for students, and 4) decrease the number of students who cannot graduate due to musculoskeletal injury. Students (N=291) from one company were divided into three groups of 97 students. Three methods were used to screen and refer students for medical intervention: 1) traditional (T), 2) by health care providers (HCP), or 3) by Drill Sergeants (DS). Screening by HCP and DSs involved using a new screening tool to identify and consequently refer students with symptoms to a troop medical clinic (TMC) for early evaluation and intervention. Using the screening tool, HCPs identified 92% of students with injuries, while DSs accurately identified 80%. The screening did not reduce the number of students receiving limited duty status, total limited duty days, or the number of students that could not graduate due to musculoskeletal injury ("holdovers") (p>0.05). The screening tool demonstrated good sensitivity and specificity whether conducted by HCPs or DSs. It failed to demonstrate efficacy in reducing the impact of musculoskeletal injuries among Combat Medic soldiers, as measured by limited duty days and holdovers.  相似文献   
903.
Decoding nonverbal social cues involves skills such as understanding emotions and discerning kin relationships. Social cue decoding has been described as an automatic process which does not tax cognitive resources. However, clinical deficits in social decoding are often interpreted in terms of deficits in attention and working memory. Two experiments are described which used dual task methodology to investigate the role of working memory in dynamic social cue decoding tasks: the Interpersonal Perception Task (IPT, Experiment 1) and the Profile of Nonverbal Sensitivity (PONS, Experiment 2). Results revealed that decoding social cues from the IPT did not require working memory resources, while social perception in the PONS made heavy demands on working memory. Implications for theoretical interpretation of these tasks and their use in clinical populations are discussed.
Louise H. PhillipsEmail:
  相似文献   
904.
Previous research on the sexual abuse of older adults has revealed few cases of the sexual abuse of older men. The first national study of the sexual abuse of vulnerable adults in facilities, reported in this article, collected data on alleged, investigated, and substantiated cases of sexual abuse. This study revealed 26 cases reported and screened in for investigation concerning the alleged sexual abuse of older men (aged 50 and older) residing in nursing homes. Cases occurred in five states within a six month time period. Of these cases, six were confirmed upon investigation by Adult Protective Services or other regulatory agencies. Victims tended to be predominantly white males with cognitive and physical deficits that limited their ability for self care. The most typical sexual abuse alleged and substantiated was fondling. Residents were more often substantiated as the abuser than other perpetrators. Sexual abuse of older men in nursing homes crosses traditional gender, cultural, and role boundaries for both victims and perpetrators.  相似文献   
905.
In Africa, 5.8 per cent of enrolled tertiary students go outside their homelands for tertiary study. No other world region has this high a share of outbound student mobility. In this study, I examined why African countries have larger student outflows than other regions and, in particular, I considered the importance of tertiary education capacity in the region for student mobility. I evaluated the determinants of student outflows from African countries for three different measures: the total number of tertiary students abroad, the percentage of the tertiary age cohort studying abroad and the percentage of total enrolled students abroad. In addition to showing that country rankings differ on these mobility measures, the findings indicate that their determinants also differ. The study premise was that student outflows should be lower from countries that have a greater supply of tertiary training capacity and that thesis received strong support in models that estimated the percentage of total enrolled students abroad. In models for that outcome, student outflows were also larger if countries had high tertiary demand and populations under 2 million. The findings for models that estimated total numbers abroad and share of the tertiary cohort abroad were similar after controlling for interactions between tertiary education supply and GDP per capita. In addition, population size and per capita GDP were stronger correlates of student mobility in those models, which suggests that it is more difficult for education supply and demand measures to account for student outflows when crude outflow measures are used. I concluded that strengthening tertiary education supply at home would be a cost‐effective way for African governments to increase their human capital and reduce brain drain losses.  相似文献   
906.
Declining rates of participation are an increasing challengefor studies that involve telephone surveys. This study examinedthe costs of a telephone survey methodology that used increasinglyintensive tracing methods to track a pool of claimants who hadsustained occupational back injuries. It also compared the respondentsample to people who refused the survey and/or were not locatedor contacted. 3,181 claimants were drawn from a database maintainedby the Missouri Division of Workers’ Compensation (DWC)and 1,475 completed a telephone interview. The DWC databaseprovided data reflecting monetary and disability outcomes forall potential participants; telephone interviews provided additionalself-reported data. More intensive tracing strategies improvedthe representativeness of the sample, yielding more women andminority participants. Relative to less intensive techniques,advanced tracing efforts located people whose DWC records weremore similar to claimants not located. While the hands-on tracingefforts reduced the apparent bias of the respondent sample,costs increased as tracing strategies intensified – over$98,000 was spent to trace 1,027 claimants who were never locatedor contacted. The results suggest some guidelines that may facilitatedecision-making for researchers and funders who must balancethe trade-off between costs and nonresponse bias when planningsurveys.  相似文献   
907.
Although staff training in public child welfare agencies is thought to be a critical component of effective practice, little is known about the delivery and effectiveness of training interventions. Few evaluations are published in the literature and it is uncertain how much evaluation activity is being conducted and utilized. This study collected data from 48 public child welfare agencies in the United States regarding the conduct of training evaluation and the utilization of training data. The data are discussed within the context of planning the next steps for public agencies’ efforts in training evaluation.  相似文献   
908.
Community-based research (CBR) is rapidly gaining recognitionsas an important tool in addressing complex environmental, healthand social problems. CBR attempts to marry community developmentwith knowledge generation. However, little is known about theCanadian CBR context. This paper reports on the analysis ofan element within a web-based survey to investigate the statusof CBR in Canada. The survey included 25 questions. This paperfocuses on responses to one open-ended question (Q20): ‘Ifthere was one thing you could change about [your last CBR] project,what would it be?’ A content analysis approach guidedanalysis and responses were coded into main theme and subthemes.Our collective reflections offer other CBR practitioners anopportunity to more effectively plan future partnerships.  相似文献   
909.
OBJECTIVE AND PARTICIPANTS: The authors assessed the stability of diet and physical activity and their relationship to weight changes in first-year university women. METHODS: They collected anthropometric and body composition data from 101 resident women at the beginning of their first year of college and again at 12 months. The authors obtained physical activity and dietary logs 4 times throughout the year. RESULTS: Caloric intake decreased over 12 months in all participants (p = .01). There was little change in physical activity in participants who lost weight (p = .73, d = .18). Those who gained weight experienced a trend toward decreased physical activity (p = .13, d = .38). A significant Time X Group interaction on physical activity (p = .04) suggests that physical activity patterns differed substantially between individuals who gained weight and those who lost weight. CONCLUSIONS: Reduction in physical activity appears to be the defining characteristic in freshman weight gain.  相似文献   
910.
The British Menopause Society Council is committed to provide up-to-date authoritative reviews to aid health professionals to inform and advise women about key issues in postreproductive health. This guidance refers to non-estrogen-based treatments for menopausal symptoms, such as hot flushes, symptoms of urogenital atrophy and lack of sexual desire. Treatment of choice should be based on up to-date information and targeted to individual women's needs. Non-hormonal strategies may be useful for women with estrogen-dependent disease such as breast cancer.  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