全文获取类型
收费全文 | 494篇 |
免费 | 6篇 |
专业分类
教育 | 350篇 |
科学研究 | 45篇 |
各国文化 | 1篇 |
体育 | 57篇 |
文化理论 | 6篇 |
信息传播 | 41篇 |
出版年
2023年 | 2篇 |
2022年 | 11篇 |
2021年 | 17篇 |
2020年 | 16篇 |
2019年 | 23篇 |
2018年 | 35篇 |
2017年 | 27篇 |
2016年 | 29篇 |
2015年 | 14篇 |
2014年 | 27篇 |
2013年 | 104篇 |
2012年 | 14篇 |
2011年 | 16篇 |
2010年 | 14篇 |
2009年 | 18篇 |
2008年 | 14篇 |
2007年 | 13篇 |
2006年 | 9篇 |
2005年 | 11篇 |
2004年 | 11篇 |
2003年 | 10篇 |
2002年 | 3篇 |
2001年 | 6篇 |
2000年 | 7篇 |
1999年 | 4篇 |
1998年 | 2篇 |
1996年 | 2篇 |
1995年 | 2篇 |
1994年 | 4篇 |
1992年 | 4篇 |
1991年 | 2篇 |
1987年 | 1篇 |
1986年 | 1篇 |
1985年 | 1篇 |
1984年 | 2篇 |
1981年 | 2篇 |
1979年 | 2篇 |
1978年 | 1篇 |
1977年 | 1篇 |
1976年 | 1篇 |
1974年 | 1篇 |
1973年 | 1篇 |
1972年 | 2篇 |
1968年 | 1篇 |
1948年 | 1篇 |
1910年 | 1篇 |
1907年 | 1篇 |
1892年 | 1篇 |
1890年 | 1篇 |
1857年 | 3篇 |
排序方式: 共有500条查询结果,搜索用时 15 毫秒
121.
Tanya Pyne Karin Newman Susie Leigh AlaN. Cowling Katherine Rounce 《Health information and libraries journal》1999,16(1):3-14
This article reports on clinicians’ use of library resources and the competencies they require to access information necessary for the practice of evidence-based healthcare. It is based on the results of a study commissioned by North Thames Region to identify the training needs of clinicians for the adoption and practice of evidence-based healthcare. Participants in this qualitative research study included librarians, clinicians (doctors, nurses and PAMs) and managers from four Acute and Community Trusts in and around London. The research indicates that the majority of clinicians recognize the need to keep up-to-date with changes in their specialty and many visit their libraries on a frequent basis, however, few appear to be searching for information with which to inform their immediate clinical decisions. Our sample acknowledged their low usage of journals such as Bandolier, the Health Effectiveness Bulletin and Journal of Evidence-Based Medicine. Similarly, low use of electronic databases, such as Cochrane and Cinahl, were reported. Examination of skill and self-efficacy levels in accessing and using information databases revealed wide variations across professions, specialities and Trusts. Qualitative research methods were employed to elicit the key competencies required to access clinically relevant research evidence, and a framework for integrating these competencies is presented. 相似文献
122.
Previous studies have found that reduced stick stiffness increases puck velocity in young male ice hockey players. This study
investigates the hypothesis that female players are disadvantaged by using equipment that is designed for taller and stronger
players. The purpose of this study was to investigate if stick flexibility and puck weight affect puck velocity in standing
slap shots performed by female ice hockey players. There was a significant increase in puck velocity (4.1%, p = 0.037) when stick stiffness and puck weight were reduced. ANOVA revealed that there was a significant correlation between
stick, puck and the participant herself (R
2 = 0.987). Spearman’s correlation analysis revealed that participants with higher puck velocities benefitted the most when
the stick flexibility and puck weight were reduced (r = 0.648, p = 0.043). It was concluded that decreased stick stiffness and puck weight increased puck velocity in standing slap shots
for female ice hockey players. 相似文献
123.
This articles reports new discoveries relating to ground glass and silica in European easel paintings from the 15th to the 17th centuries that were created by various German, Italian and Netherlandish artists. The earliest known additions of these extenders date to the early 1430s. Glass powder of varying fineness, prepared from vessel or window cullet, is often found in red lake glazes as well as in other colours or preparatory layers of paintings. SEM/EDX analyses of the glass particles reveal a variety of chemical compositions (soda ash, wood ash, wood ash-lime, wood ash-lead, mixed alkali), which are discussed with respect to the provenance of the paintings. Historical sources on painting techniques mention glass additions most frequently to accelerate drying of oil paints, but also occasionally to facilitate grinding of pigments. Another possible function of powdered glass and silica, especially in oil-bound red lake glazes, is that of a transparent filler, as will be here discussed based on paint trials. 相似文献
124.
Cecilia Martinez-Torteya G. Anne Bogat Alexander von Eye Alytia A. Levendosky 《Child development》2009,80(2):562-577
Individual and family characteristics that predict resilience among children exposed to domestic violence (DV) were examined. Mother–child dyads ( n = 190) were assessed when the children were 2, 3, and 4 years of age. DV-exposed children were 3.7 times more likely than nonexposed children to develop internalizing or externalizing problems. However, 54% of DV-exposed children maintained positive adaptation and were characterized by easy temperament (odds ratio [OR] = .39, d = .52) and nondepressed mothers (OR = 1.14, d = .07), as compared to their nonresilient counterparts. Chronic DV was associated with maternal depression, difficult child temperament, and internalizing or externalizing symptoms. Results underscore heterogeneous outcomes among DV-exposed children and the influence of individual and family characteristics on children's adaptation. 相似文献
125.
Paul D. Hastings Lindsey C. Partington Rana Dajani Antje von Suchodoletz 《Child development》2021,92(5):e798-e816
This study of 52 predominantly lower income Jordanian and Syrian families with young children (31 girls; Mage = 53.37 months, SD = 3.53) in Jordan began in 2019, before the pandemic. Families were followed to explore stress physiology, family functioning, and mental health over the first 9 months of the pandemic. Mothers reported less adaptive coping and more negative changes to family life in June 2020 when their children had poorer behavioral self-regulation and more behavior problems, and when families had lower income, in 2019. More negative changes to family life predicted greater hair cortisol concentrations in children in June 2020, and more negative changes and less adaptive coping predicted worse child and mother psychosocial adjustment in December 2020. 相似文献
126.
Nicole von der Linden Wolfgang Schneider Claudia M. Roebers 《Metacognition and Learning》2011,6(1):3-23
Two studies were conducted to investigate whether context variations were suitable to improve metacognitive judgments in children
in a complex, everyday memory task. In the first phase of each experiment, participants were shown a short event (video) and
gave judgments-of-learning (JOLs), that is, rated their certainty that they would later be able to recall specific details
correctly. In the second phase of the experiments, participants took part in a memory interview about the memory event and
gave confidence judgments (CJs), that is, rated their certainty that the provided answers to the memory questions were correct.
Study 1 specifically investigated the potential positive influence of giving a verbal summary before the JOL-interview on
metacognitive monitoring, whereas Study 2 had a closer look on the effect of intentional versus non-intentional encoding on
JOL and CJ accuracy. Results revealed no significant influence of giving a summary and hardly any effect of encoding condition
on metamemory monitoring although children from age 6 on showed adequate monitoring performance. JOL accuracy appears to be
a complex process, which is even more difficult to influence in children than in adults. 相似文献
127.
Satisfying heterogeneous user needs via innovation toolkits: the case of Apache security software 总被引:3,自引:0,他引:3
Manufacturers customarily provide only a few product variants to address the average needs of users in the major segments of markets they serve. When user needs are highly heterogeneous, this approach leaves many seriously dissatisfied. One solution is to enable users to modify products on their own using “innovation toolkits.” We explore the effectiveness of this solution in an empirical study of Apache security software. We find high heterogeneity of need in that field, and also find that users modifying their own software to be significantly more satisfied than non-innovating users. We propose that the “user toolkits” solution will be useful in many markets characterized by heterogeneous demand. 相似文献
128.
129.
130.
Alexander H. K. Montoye James M. Pivarnik Lanay M. Mudd Subir Biswas Karin A. Pfeiffer 《Measurement in physical education and exercise science》2016,20(3):173-183
The purpose of this article is to compare accuracy of activity type prediction models for accelerometers worn on the hip, wrists, and thigh. Forty-four adults performed sedentary, ambulatory, lifestyle, and exercise activities (14 total, 10 categories) for 3–10 minutes each in a 90-minute semi-structured laboratory protocol. Artificial neural networks (ANNs) were developed for four accelerometers (right hip, both wrists, and right thigh,) to predict individual activities and activity categories, with direct observation (DO) as criterion. The wrist-mounted accelerometers achieved the highest accuracy for individual activities (80.9%–81.1%) and activity categories (86.6%–86.7%); accuracy was not different between wrists. The hip-mounted accelerometer had the lowest accuracy (66.2% individual activities, 72.5% activity categories); thigh-mounted accelerometer accuracy (71.4% individual activities, 84.0% activity categories) fell between the wrist- and hip-mounted accelerometers. ANNs developed for accelerometers worn on the wrists and thigh provided high accuracy for activity type prediction and represent a potential approach to physical activity (PA) assessment. 相似文献