全文获取类型
收费全文 | 527篇 |
免费 | 13篇 |
专业分类
教育 | 353篇 |
科学研究 | 29篇 |
各国文化 | 10篇 |
体育 | 39篇 |
文化理论 | 10篇 |
信息传播 | 99篇 |
出版年
2022年 | 5篇 |
2021年 | 11篇 |
2020年 | 6篇 |
2019年 | 13篇 |
2018年 | 34篇 |
2017年 | 23篇 |
2016年 | 26篇 |
2015年 | 15篇 |
2014年 | 17篇 |
2013年 | 112篇 |
2012年 | 18篇 |
2011年 | 17篇 |
2010年 | 14篇 |
2009年 | 14篇 |
2008年 | 15篇 |
2007年 | 11篇 |
2006年 | 8篇 |
2005年 | 20篇 |
2004年 | 12篇 |
2003年 | 8篇 |
2002年 | 11篇 |
2001年 | 5篇 |
2000年 | 9篇 |
1999年 | 8篇 |
1998年 | 4篇 |
1997年 | 4篇 |
1996年 | 6篇 |
1995年 | 6篇 |
1994年 | 3篇 |
1993年 | 3篇 |
1992年 | 4篇 |
1991年 | 7篇 |
1990年 | 10篇 |
1989年 | 2篇 |
1988年 | 8篇 |
1987年 | 4篇 |
1986年 | 5篇 |
1985年 | 3篇 |
1984年 | 3篇 |
1983年 | 2篇 |
1982年 | 3篇 |
1981年 | 4篇 |
1980年 | 2篇 |
1979年 | 3篇 |
1966年 | 2篇 |
1917年 | 2篇 |
1910年 | 2篇 |
1907年 | 3篇 |
1899年 | 1篇 |
1892年 | 1篇 |
排序方式: 共有540条查询结果,搜索用时 7 毫秒
71.
Michele L. Ybarra David Finkelhor Kimberly J. Mitchell Janis Wolak 《Child abuse & neglect》2009,33(12):857-869
ObjectiveTo examine the relationship between the use of preventive software on the home computer and unwanted exposure to sexual material online.MethodsThe Youth Internet Safety Survey-2 was a national, RDD telephone survey conducted in March–June 2005. Eight hundred households (one caregiver and one child between the ages of 10 and 17 years) with home Internet access answered questions pertaining to Internet prevention activities in the household and adolescent behaviors and exposures online.ResultsUnwanted exposure to sexual material occurred in 32% of youth in homes with pop-up/spam blockers and 25% of youth in homes with filtering, blocking, or monitoring software on the home computer, compared to 43% of households without preventive software installed on the home computer. Among otherwise similar youth, pop-up/spam blockers installed on the home computer were significantly associated with 59% lower odds of reporting unwanted exposure to sexual material on the home computer; and filtering, blocking, or monitoring software was significantly associated with 65% lower odds. When data were stratified by youth sex, associations between preventive software and unwanted exposure were similar for boys and girls. When stratified by age, preventive software was associated with significantly reduced risk of unwanted exposure for 10–12-year olds and 13–15-year olds, but not for 16–17-year olds.ConclusionAlthough these correlational analyses are far from providing conclusive evidence that preventive software protects children from unwanted exposure to sexual material online, findings suggest that caregivers of boys and girls 15 years of age and younger who want to reduce the likelihood of unwanted exposure to sexual material on the home computer should consider including preventive software—especially filtering, blocking, or monitoring software—in their Internet safety plan.Practice implicationsPractitioners should partner with caregivers in developing an Internet safety plan, including proactive caregiver-youth discussions about expected Internet behavior appropriate for their household. 相似文献
72.
73.
74.
Patricia Margaret Stafford 《English in Education》2010,44(1):27-44
This paper argues that 'creativity' in education must be supported by the communicative approaches adopted by tutors within Initial Teacher Education.
Two case studies are described which examine the interactions between English university tutors and post graduate students on a year-long course which confers Qualified Teacher Status. The studies take place in the context of the taught elements of the students'Primary English' module. Findings raise questions about the levels of independent thinking that can and should be encouraged within a climate of compliance with stringent government requirements both for Teacher Education and for primary school provision. 相似文献
Two case studies are described which examine the interactions between English university tutors and post graduate students on a year-long course which confers Qualified Teacher Status. The studies take place in the context of the taught elements of the students'Primary English' module. Findings raise questions about the levels of independent thinking that can and should be encouraged within a climate of compliance with stringent government requirements both for Teacher Education and for primary school provision. 相似文献
75.
Experimental research in school psychology internationally: An assessment of journal publications and implications for internationalization 下载免费PDF全文
John C. Begeny Rebecca A. Levy Rahma Hida Kate Norwalk 《Psychology in the schools》2018,55(2):120-136
Past studies have examined the contents of journal articles in school psychology, and more recently there has been increased interest in examining the frequency and characteristics of experimental studies appearing in school psychology journals. However, no prior studies have examined the international representation of experimental and intervention studies. This study evaluated every article published from 2002 to 2016 across eight school psychology journals that publish international scholarship. Several research questions were addressed (e.g., what is the frequency of experimental research internationally, what are the characteristics of those studies, and is the scholarship consistent with the global geography of school psychology?). Overall, findings revealed that although the field of school psychology is arguably international, the experimental research reflected in the eight journals selected for review does not adequately represent the global geography of the field, thereby also suggesting that the degree of internationalization in school psychology is relatively poor. The importance of these and related findings is discussed, and recommendations are provided that may help to improve the geographical representation of experimental research in school psychology as well as its overall internationalization. 相似文献
76.
Heidi R. Thornton Joanna Miller Lee Taylor Charli Sargent Michele Lastella 《Journal of sports sciences》2018,36(13):1476-1484
Currently, very little is known about the impact of short- or long-haul air travel on the sleep and wellbeing of wheelchair basketball athletes. Eleven national wheelchair basketball athletes wore actigraphy monitors prior, during, and after air travel to the United Kingdom. Upon arrival, participants rated their subjective jet-lag, fatigue, and vigor. Individuals traveled to the United Kingdom from different locations in Australia, the United States, and Europe and were categorised according to travel length [LONG (up to 30.2 h) or SHORT (up to 6.5 h)]. Linear mixed models determined effects of travel length on sleep and subjective ratings of jet-lag, fatigue, and vigor. During competition, subjective fatigue and jet-lag were substantially higher (ES = 0.73; ±0.77) and (ES = 0.57; ±0.60), subjective vigor was lower (ES = 1.94; ±0.72), and get-up time was earlier (ES = 0.57; ±0.60) for LONG when compared to SHORT. Travelling greater distances by airplane had a larger effect on subjective ratings of jet-lag, fatigue and vigor, rather than sleep. Irrespective of travel group, sleep and subjective responses were compromised, reflecting the travel requirements, competition-mediated influences, and/or due to a change in environment. 相似文献
77.
Xiao-jian Hu Lun-hao Chen Michele C. Battié Yue Wang 《Journal of Zhejiang University. Science. B》2018,19(7):547-558
Back pain is a worldwide health problem, adding a tremendous burden to modern societies. However, little information on back health is available in China, even though a quarter of the world’s population is Chinese. To enhance knowledge in this area, we designed and initiated the Hangzhou Lumbar Spine Study, which is a cross-sectional study of a general sample of mainland Chinese with focusing on disc degeneration, Modic changes, endplate lesions, and back pain. The study consists of a structured questionnaire to measure back pain history and lifetime exposure to suspected risk factors, magnetic resonance imaging of the lumbar spine, bone mineral density study of the spine and hip, and DNA sample analysis. Here we briefly introduce the study methodology, report the test-retest reliability of the questionnaire, and describe the cohort profile to date. Since May 2014, 301 randomly selected subjects (male/female, 122/179; mean age, 51.0 years; range, 20–87 years) have been recruited. Tests-retests of the questionnaire, completed by 40 participants, revealed good reliability. To our knowledge, the Hangzhou Lumbar Spine Study is the first population-based epidemiological study conducted to characterize lumbar spinal phenotypes and back pain, their interaction, and their associations with lifetime environmental exposure, in mainland Chinese. Epidemiological information obtained from a reliable questionnaire, magnetic resonance (MR) imaging data, dual energy X-ray absorptiometry (DXA) measurements, and DNA analysis may serve as a valuable reference for future studies on back health, particularly for mainland Chinese. 相似文献
78.
We add to research on embodied cognition by investigating the observational practices of amateur astronomers. Specifically, we take an interactionist perspective and examine how the body is recruited, moment by moment, as a resource for producing and communicating meaning during field activity. The data corpus is a set of ethnographic video records and field notes on the routines of a community of astronomers, especially small-group interactions during planning, searching for, observing, and confirming sight of a celestial target. Within this space, our analysis highlights how different modalities of embodied action and reasoning (gestures, tool use, gaze, touch, and others) were deployed and coordinated throughout the process of observing a celestial object and how those emerged in the transactions among participants. Our findings rehearse many issues and topics in the contemporary literature (e.g., gesturing for measuring or representationally) but also reveal important, novel forms of embodied action and reasoning in science, technology, engineering, and mathematics practices (e.g., training the eyes in averted vision and inscribing a celestial scene onto one’s hand). More broadly, these findings further affirm the power of interactionist analyses of knowing and learning while also surfacing areas in which expanded theorizing is needed to account for the full set of cognitive phenomena we observed. 相似文献
79.
William B. Baun Michele R. Baun Peter B. Raven 《Research quarterly for exercise and sport》2013,84(3):380-384
Abstract Fifteen well-conditioned college women, who had been thoroughly trained in the correct technique for women's push-ups, were tested for maximal pushing strength in two positions and for the number of complete push-ups they were able to perform at the rate of 41 push-ups per minute. For statistical purposes, calculations of maximal strength for each individual were based upon the average of the recorded maximal arm strengths in the high and low positions plus the average of the weight supported in the high and low positions. The work load was calculated from the distance between the high and low positions, the average supported weight, and the number of push-ups the subject was able to perform until exhausted. A correlation coefficient of .76 was obtained between the calculated maximal strength measures and the work load, indicating a statistically significant positive relationship. 相似文献
80.
Gershon Tenenbaum Noa Levy‐Kolker Michael Bar‐Eli Robert Weinberg 《Journal of sports sciences》2013,31(6):529-534
This study was concerned with the interactive role of experience of athletic skill with other relevant environmental variables (display complexity, attentional resources, exposure time of stimuli) on perception (recall) of structured handball game situations. Nineteen experienced (older) and 19 less experienced (younger) handball players were assigned randomly either to ball‐bouncing (diverted attention) or to calm seated (focused attention) conditions. In each of the two conditions, the subjects were exposed to a total of 36 slides containing 2–3, 5–6 and 8–10 players. Eighteen slides were exposed for 0.5 s and 18 for 1.0 s. All the slides contained structured defence and offence situations. Recall scores were subjected to repeated‐measures ANOVA using attention condition and age as between‐subject factors and task complexity and exposure duration as within‐subject factors. The results showed that the recall of less experienced players deteriorated more than the recall of more experienced players following exposure to complex displays (≥ 8 players) while engaging in a secondary task (bouncing). The findings suggest that research paradigms should be applied in the field of sport which share both ecological validity and a potential to discover the cognitive substrates underlying experience and age in skilled motor performance. 相似文献