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   127篇
  免费   3篇
教育   81篇
科学研究   17篇
各国文化   2篇
体育   7篇
文化理论   5篇
信息传播   18篇
  2022年   2篇
  2020年   4篇
  2019年   5篇
  2018年   9篇
  2017年   8篇
  2016年   11篇
  2015年   3篇
  2014年   11篇
  2013年   25篇
  2012年   6篇
  2011年   3篇
  2010年   3篇
  2009年   1篇
  2008年   2篇
  2007年   2篇
  2005年   4篇
  2004年   3篇
  2003年   1篇
  2002年   4篇
  2000年   1篇
  1997年   2篇
  1996年   2篇
  1989年   1篇
  1988年   2篇
  1987年   1篇
  1985年   1篇
  1983年   1篇
  1981年   3篇
  1975年   1篇
  1974年   2篇
  1970年   2篇
  1967年   1篇
  1961年   1篇
  1956年   1篇
  1955年   1篇
排序方式: 共有130条查询结果,搜索用时 15 毫秒
81.
82.
The current study is an analysis of public service announcements (PSAs) from an effective safer sex campaign that utilized a sensation-seeking targeting (SENTAR) approach. Two random samples of heterosexually active young adults (sample one N = 1,463, sample two N = 895) viewed different sets of safer sex PSAs on a laptop computer and answered questions about their perceived sensation value and perceived effectiveness. Multiple regression analyses examined the impact of (a) demographic, (b) individual difference, (c) sexual context, and (d) message variables including perceived message sensation value (PMSV) on the perceived message effectiveness (PME) of the PSAs. Results indicated that females, African Americans, condom users, and those with less education viewed the PSAs as slightly more effective than males, Caucasians, non-condom users, and those with more education. PMSV and personal utility emerged as the strongest predictors of PME, even after controlling for all of the aforementioned variables. Implications for further research on PMSV and perceived and actual effectiveness of PSAs are offered.  相似文献   
83.
Hormones play an important role in the development and regulation of reproductive function and the menstrual cycle of women. Extremes of body weight tend to affect the homeostasis of the hypothalamo–pituitary–gonadal axis. This cross-sectional study was carried out in 113 women (57 with primary infertility and 56 with secondary infertility) in the age group 20–35 years, presenting for hormonal evaluation of infertility in a tertiary care hospital. After preliminary clinical evaluation, anthropometric indices (height, weight, BMI, waist circumference and waist hip ratio) were measured in all subjects. Fasting blood sample drawn on second/third day of menstrual cycle was analysed for serum luteinizing hormone, follicle stimulating hormone (FSH), prolactin and thyroid stimulating hormone (TSH). Serum FSH levels showed a significant positive correlation with indicators of central obesity (waist circumference and waist hip ratio in both the study groups). In primary infertility, significant positive correlation was also observed between serum FSH levels and other markers of obesity like body weight, hip circumference and BMI. In secondary infertility, serum prolactin and serum TSH levels demonstrated a significant positive correlation with body weight and BMI. Obesity is associated with hormonal derangements which are responsible for infertility. In overweight women with infertility, weight loss should be considered as a first line treatment.  相似文献   
84.
Using the United States and Great Britain as a comparative case study, this article employs a historical framework to consider the broad array of social, cultural, political, and economic contexts that led to divergent outcomes in the early development of broadcasting policy. This comparative historical analysis reveals the causal chains formed before the 1920s despite a period of post-war contingency. As a policy option, government control was removed in the United States but stayed in place in Britain after the war. This comparative approach can help to explain policy outcomes and inform modern policy debates.  相似文献   
85.
This conceptual paper contributes to the scholarship on life-long learning programs at public universities. It investigates the unique relationship between these institutions and their state, utilizing Ohio as an illustrative example. A review of several university mission statements illuminates the responsibility of these institutions to their older-learner programs. Particular emphasis is placed on Over-60 programs, a university course audit program found in many states. Older learners face many barriers and challenges on college campuses because institutions struggle with limited resources and support for older-learner programs. This paper further encourages dialogue about the benefits of older learner programs.  相似文献   
86.
Godin  Benoit 《Minerva》2002,40(4):375-397
Official science and technology statistics arefifty years old. Among industrial countries,the forerunners were the United States, Canadaand Great Britain. This paper traces thedevelopment and the construction of S&Tstatistics in these three countries, and theirsubsequent standardization, mainly by theOECD, in the 1960s. It shows how military andscience policy needs drove the construction ofstatistics, until economic considerations cameto dominate their development. It alsodiscusses how statistics interacted withpolitics by way of studies that documentedgaps between OECD Member countries and betweenthe OECD and the USSR.  相似文献   
87.
The present study was designed to examine acculturative changes, and their effects on mental health and family functioning, in recent‐immigrant Hispanic adolescents. A sample of 302 Hispanic adolescents was assessed five times over a 2½‐year period. Participants completed measures of Hispanic and U.S. practices, collectivist and individualist values, and ethnic and U.S. identity at each time point. Baseline and Time 5 levels of mental health and family functioning were also assessed. Latent class growth analyses produced two‐class solutions for practices, values, and identifications. Adolescents who increased over time in practices and values reported the most adaptive mental health and family functioning. Adolescents who did not change in any acculturation domain reported the least favorable mental health and family functioning.  相似文献   
88.
This article documents the steps taken to assess metadata errors within the IDEALS repository. It describes the workflows established to create accurate and consistent metadata, focusing especially on the batch ingest and retroactive metadata remediation processes. It also seeks to address theoretical issues surrounding the concept of metadata quality.  相似文献   
89.
The neurodevelopmental sequelae of early deprivation were examined by testing ( N  =   132) 8- and 9-year-old children who had endured prolonged versus brief institutionalized rearing or rearing in the natal family. Behavioral tasks included measures that permit inferences about underlying neural circuitry. Children raised in institutionalized settings showed neuropsychological deficits on tests of visual memory and attention, as well as visually mediated learning and inhibitory control. Yet, these children performed at developmentally appropriate levels on similar tests where auditory processing was also involved and on tests assessing executive processes such as rule acquisition and planning. These findings suggest that specific aspects of brain-behavioral circuitry may be particularly vulnerable to postnatal experience.  相似文献   
90.
Usually sickle cell traits are asymptomatic but co-existence of various factrors may alter the clinical as well as biochemical levels. In India sickle cell traits are neglected condition. Here we are presenting the alpha deletion in association with low serum iron and increased HbF level with Xmn-1 carriers in sickle cell traits. Sickle traits with alpha deletions had significantly low level of serum iron (P-value <0.05) with low level of reticulocytes and red cell indices while Xmn-1 polymorphism associated with increased HbF level. Study concludes low serum iron associated with alpha deletions and high level of HbF associated with Xmn-1 polymorphism in sickle cell traits.  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