全文获取类型
收费全文 | 345篇 |
免费 | 1篇 |
专业分类
教育 | 212篇 |
科学研究 | 25篇 |
体育 | 52篇 |
文化理论 | 12篇 |
信息传播 | 45篇 |
出版年
2024年 | 2篇 |
2023年 | 3篇 |
2022年 | 3篇 |
2021年 | 9篇 |
2020年 | 8篇 |
2019年 | 23篇 |
2018年 | 20篇 |
2017年 | 14篇 |
2016年 | 18篇 |
2015年 | 8篇 |
2014年 | 11篇 |
2013年 | 54篇 |
2012年 | 19篇 |
2011年 | 14篇 |
2010年 | 17篇 |
2009年 | 14篇 |
2008年 | 15篇 |
2007年 | 12篇 |
2006年 | 14篇 |
2005年 | 11篇 |
2004年 | 7篇 |
2003年 | 5篇 |
2002年 | 7篇 |
2001年 | 9篇 |
2000年 | 2篇 |
1999年 | 7篇 |
1998年 | 1篇 |
1997年 | 3篇 |
1996年 | 1篇 |
1994年 | 1篇 |
1993年 | 5篇 |
1989年 | 1篇 |
1988年 | 2篇 |
1981年 | 1篇 |
1980年 | 1篇 |
1976年 | 2篇 |
1975年 | 1篇 |
1972年 | 1篇 |
排序方式: 共有346条查询结果,搜索用时 15 毫秒
141.
Elisabeth Gotschi Stefan Vogel Thomas Lindenthal Manuela Larcher 《The Journal of environmental education》2013,44(2):88-100
In 2005 a survey was used to investigate social norms and attitudes of Viennese high school students (14–20 years, n = 340) toward organic products. Young people, who already participate in household decisions and consume organic products, have not yet been recognized sufficiently in research. The Theory of Reasoned Action and discriminant analysis are used to explore relations of a number of variables and the complex field of factors influencing Viennese high school students’ shopping behavior when shopping for organic products. Key findings include the importance of primary socialization in forming social norms and shaping behavior. Surprisingly, knowledge of organic products does not explain students’ self-reported shopping behavior when shopping for organic products. Cultural patterns seem to be far more useful to predict behavior and attitudes toward organic products. 相似文献
142.
Stefan Samuelsson Richard Olson Sally Wadsworth Robin Corley John C. DeFries Erik Willcutt Jacqueline Hulslander Brian Byrne 《Reading and writing》2007,20(1-2):51-75
Genetic and environmental influences on prereading skills in preschool and on early reading and spelling development at the end of kindergarten were compared among samples of identical and fraternal twins from the U.S. (Colorado), Australia, and Scandinavia. Mean comparisons revealed significantly lower preschool print knowledge in Scandinavia, consistent with the relatively lower amount of shared book reading and letter-based activities with parents, and lack of emphasis on print knowledge in Scandinavian preschools. The patterns of correlations between all preschool environment measures and prereading skills within the samples were remarkably similar, as were the patterns of genetic, shared environment, and non-shared environment estimates: in all samples, genetic influence was substantial and shared environment influence was relatively weak for phonological awareness, rapid naming, and verbal memory; genetic influence was weak, and shared environment influence was relatively strong for vocabulary and print knowledge. In contrast, for reading and spelling assessed at the end of kindergarten in the Australian and U.S. samples, there was some preliminary evidence for country differences in the magnitude of genetic and environmental influences. We argue that the apparently higher genetic and lower shared environment influence in the Australian sample was related to a greater emphasis on formal reading instruction, resulting in more advanced reading and spelling skills at the end of kindergarten, and thus there was greater opportunity to observe genetic influences on response to systematic reading instruction among the Australian twins. 相似文献
143.
Brian Byrne Stefan Samuelsson Sally Wadsworth Jacqueline Hulslander Robin Corley John C. DeFries Peter Quain Erik G. Willcutt Richard K. Olson 《Reading and writing》2007,20(1-2):77-102
Grade 1 literacy skills of twin children in Australia (New South Wales) and the United States (Colorado) were explored in a genetically sensitive design (N = 319 pairs). Analyses indicated strong genetic influence on word and nonword identification, reading comprehension, and spelling. Rapid naming showed more modest, though reliable, genetic influence. Phonological awareness was subject to high nonshared environment and no reliable genetic effects, and individual measures of memory and learning were also less affected by genes than nonshared environment. Multivariate analyses showed that the same genes affected word identification, reading comprehension, and spelling. Country comparisons indicated that the patterns of genetic influence on reading and spelling in Grade 1 were similar, though for the U.S. but not the Australian children new genes came on stream in the move from kindergarten to Grade 1. We suggest that this is because the more intensive kindergarten literacy curriculum in New South Wales compared with Colorado, consistent with the mean differences between the two countries, means that more of the genes are “online” sooner in Australia because of accelerated overall reading development. 相似文献
144.
S. Stefan Soltysik Nancy K. Dess W. Jeffrey Wilson John A. Matochik Steve Berg 《Learning & behavior》1988,16(2):177-184
Changes in respiration amplitude, respiration rate, and heart rate in response to a conditioned signal for shock were measured concurrently in kittens and adult cats. The data were analyzed with respect to qualitative and quantitative variability across trials and subjects; correlation among measures; skewness; and kurtosis. Suppression of respiration amplitude was the most reliable response across trials and subjects, with increases in respiration rate second and heart rate by far the least reliable. Correlations between each pair of measures were moderate. Respiration-amplitude responses were negatively skewed, but this deviation from normality was moderate and consistent across subjects. The measurement of conditioned respiratory suppression is a viable addition or alternative to the conditioned emotional response procedure in studies of classically conditioned fear. 相似文献
145.
Global software engineering (GSE) has received increased attention, as globalization enables and encourages increased distribution of product development. Many empirical studies and systematic literature reviews (SLRs) focus on the identification of challenges, this paper however presents the first SLR collecting and analyzing solutions associated with GSE, while also evaluating the level of empirical validation of said solutions. As a starting point the paper presents a GSE model, designed to categorize solutions into process areas, useful for the analysis of the research community's contributions to state-of-the-art and identifying fundamental gaps in research. In addition, the model categorizing the solutions is populated with references and good-examples, useful for practitioners, which can use the model to find solutions to overall challenges in various process areas. The overall results of the systematic review revealed more than 330 papers containing 127 solutions that were then identified and mapped to the model. The process areas of project management are highly populated, while other areas like product integration have received surprisingly little attention. In addition, selected process area is elaborated upon in terms of contents and deficiencies. 相似文献
146.
147.
Hardonk S Bosteels S Desnerck G Loots G Van Hove G Van Kerschaver E Vanroelen C Louckx F 《American annals of the deaf》2010,155(3):339-352
Factors contributing to parents' decision when they choose between cochlear implantation (CI) and traditional hearing aids for their child were examined. The subjects were children with severe/profound hearing loss, born 1999-2001, registered in the universal neonatal hearing screening program in the Flanders region of Belgium. Qualitative data collected retrospectively from parents were subjected to thematic content analysis. In their responses to professional advice, parents were segmented into 3 groups: (a) those whose primary considerations were the importance of oral language development and the relative potential of CI and traditional hearing aids; (b) those for whom alternative factors (e.g., medical risks, ethical issues) were paramount, even in the face of professional advocacy of CI; (c) those who followed professional advice against CI. The researchers conclude that care professionals should be sensitive to the impact of their advice and other factors in parental decision making. 相似文献
148.
The central premise in the holding of the Symposium was that there is a long tradition of co-operation among the countries of the sub-regions concerned in the domains of education, science, culture, and communication. Given the perspective of accession of most of these countries to EU membership, this co-operation will develop and expand. As such, it is worth studying so as to better understand and promote it. Thus, the Symposium examined the following topics: (i) Looking Ahead: Links and Co-operation in the Central and South Eastern Europe; (ii) Science and the Application of Science for Technology Development: Towards Enhancement of Endogenous Capacities; (iii) Co-operation through Culture Interactions: Lessons from the Past and Agenda for the Future; (iv) Enhancing the Quality of Communication for and through Better Co-operation. The conclusion is that co-operation of all sorts among the countries of the sub-regions is stronger than co-operation between them but that they should pursue their EU accession efforts, enhancing them through sub-regional co-operation in all domains. 相似文献
149.
Treacy DJ Sankaran SM Gordon-Messer S Saly D Miller R Isaac SR Kosinski-Collins MS 《CBE life sciences education》2011,10(1):18-24
In introductory laboratory courses, many universities are turning from traditional laboratories with predictable outcomes to inquiry-inspired, project-based laboratory curricula. In these labs, students are allowed to design at least some portion of their own experiment and interpret new, undiscovered data. We have redesigned the introductory biology laboratory course at Brandeis University into a semester-long project-based laboratory that emphasizes concepts and contains an element of scientific inquiry. In this laboratory, students perform a site-directed mutagenesis experiment on the gene encoding human γD crystallin, a human eye lens protein implicated in cataracts, and assess the stability of their newly created protein with respect to wild-type crystallin. This laboratory utilizes basic techniques in molecular biology to emphasize the importance of connections between DNA and protein. This project lab has helped engage students in their own learning, has improved students' skills in critical thinking and analysis, and has promoted interest in basic research in biology. 相似文献
150.
Abstract The aims of the study were to: (1) adapt the “double-push” technique from inline skating to cross-country skiing; (2) compare this new skiing technique with the conventional skate skiing cross-country technique; and (3) test the hypothesis that the double-push technique improves skiing speed in a short sprint. 13 elite skiers performed maximum-speed sprints over 100 m using the double-push skate skiing technique and using the conventional “V2” skate skiing technique. Pole and plantar forces, knee angle, cycle characteristics, and electromyography of nine lower body muscles were analysed. We found that the double-push technique could be successfully transferred to cross-country skiing, and that this new technique is faster than the conventional skate skiing technique. The double-push technique was 2.9 ± 2.2% faster (P < 0.001), which corresponds to a time advantage of 0.41 ± 0.31 s over 100 m. The double-push technique had a longer cycle length and a lower cycle rate, and it was characterized by higher muscle activity, higher knee extension amplitudes and velocities, and higher peak foot forces, especially in the first phase of the push-off. Also, the foot was more loaded laterally in the double-push technique than in the conventional skate skiing technique. 相似文献