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131.
Kärnä A Voeten M Little TD Poskiparta E Kaljonen A Salmivalli C 《Child development》2011,82(1):311-330
This study demonstrates the effectiveness of the KiVa antibullying program using a large sample of 8,237 youth from Grades 4-6 (10-12 years). Altogether, 78 schools were randomly assigned to intervention (39 schools, 4,207 students) and control conditions (39 schools, 4,030 students). Multilevel regression analyses revealed that after 9 months of implementation, the intervention had consistent beneficial effects on 7 of the 11 dependent variables, including self- and peer-reported victimization and self-reported bullying. The results indicate that the KiVa program is effective in reducing school bullying and victimization in Grades 4-6. Despite some evidence against school-based interventions, the results suggest that well-conceived school-based programs can reduce victimization. 相似文献
132.
Does An Early Intervention Influence Behavioral Development Until Age 9 in Children Born Prematurely?
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Inger Pauline Landsem Bjørn Helge Handegård Stein Erik Ulvund Jorunn Tunby Per Ivar Kaaresen John A. Rønning 《Child development》2015,86(4):1063-1079
This study examined whether the Mother–Infant Transaction Program prevents behavioral problems among preterm children (birth weight < 2000 g) until age 9. The program was administered to 72 preterms, while 74 preterms and 75 full‐terms formed control groups (N = 221). Behavior was reported by parents (Child Behavior Checklist) and teachers (Teachers Report Form) and by all on selected Strengths and Difficulties Questionnaire (SDQ) questions. Long‐term behavioral development appeared to be qualitatively unaffected by the intervention. At ages 7 and 9, fewer attention problems and better adaptation to school were reported from parents and teachers of the intervention group compared to preterm controls. At age 9, teachers reported fewer difficulties in the intervention group and better academic performance. In these areas they were reported as being at the statistically same level as term controls. 相似文献
133.
134.
Bjørn L. Basberg 《Research Policy》1983,12(4):227-237
Foreign patenting in the U.S. has been considered to be a useful technology indicator in comparisons between countries. In order to shed light on this topic, this paper will try to explain foreign patenting in the U.S. by way of data for one country - Norway.A crucial question is what role is played by exports in explaining the foreign patent activity. Is the U.S. patenting just an indicator of the export performance, or is it the other way around; that technology - measured by foreign patent activity - is an important trade explanatory variable.The first part of this paper deals with the relationship between Norwegian U.S. patenting and export to the U.S. by way of time-series analysis on data from 1883 to 1980. Then some more detailed analysis are done on industry-level data from 1920 and from 1960–1980. An hypothesis is further tested for the possible relationship between foreign U.S. patenting and the international business-cycles. Finally a detailed but tentative analysis is done on firm-level data for the years 1969–1980.The results lend partial support to the assumption that foreign U.S. patent activity reflects innovative activity in the country where the patents originated. A major advantage in using foreign patenting in the U.S. as a technology indicator, is that this type of data in general seems to be of a higher quality than domestic patent data. 相似文献
135.
Robert Jenssen Jose C. Principe Torbjørn Eltoft 《Journal of The Franklin Institute》2006,343(6):614-629
This paper contributes a tutorial level discussion of some interesting properties of the recent Cauchy-Schwarz (CS) divergence measure between probability density functions. This measure brings together elements from several different machine learning fields, namely information theory, graph theory and Mercer kernel and spectral theory. These connections are revealed when estimating the CS divergence non-parametrically using the Parzen window technique for density estimation. An important consequence of these connections is that they enhance our understanding of the different machine learning schemes relative to each other. 相似文献
136.
This paper integrates the contributions from different branches of the technology transfer literature to identify enablers driving the transfer of intermediate or appropriate technologies to recipients in rural areas of developing economies. An in-depth analysis of the literature shows that many enablers identified in the literature focus on high technology transfers and are of limited relevance in the context of rural enterprises. Other important enablers in this specific setting are ignored or insufficiently considered. This paper proposes a framework comprising a specific set of enablers that facilitates technology transfer in rural enterprises in developing regional economies. 相似文献
137.
Jörn H.B. Lengsfeld 《The Information Society》2013,29(3):141-157
Introducing an econometric approach to quantify the digital divide, this article presents a new method to facilitate crossnational and in-depth sectional analyses of the digital divide within a consistent framework. It examines the sociodemographic topology of the digital divide in an extensive crossnational analysis covering six sociodemographic factors and twenty-five countries. The findings contradict in part the conclusions of previous research. Although there are differences between the social groups, not all of the tested segmentation factors mark major fault lines of the digital divide. The notions of a gender gap, an income divide, and a divide between urban and rural areas are rejected because between-group disparity proves to be only minor in comparison to overall inequality. However, education, age, and main vocational activity do indeed mark digital boundaries in many of the observed countries. 相似文献
138.
André Brännström Ji-Guo Yu Per Jonsson Torbjörn Åkerfeldt Mats Stridsberg 《European Journal of Sport Science》2017,17(2):249-256
The present work investigated serum vitamin D (25(OH)D) status in relation to bone and muscle qualities and functions in 19 female soccer players (13–16 years) resident at northern latitude with very low sun exposure (~32–36?h/month) during winter season (late January to early March). Serum 25(OH)D, parathyroid hormone and bone turnover markers osteocalcin (OC) and beta carboxy-terminal collagen cross-links (β-Ctx), as well as body composition and muscle performance were examined. Hormones were tested using routine laboratory methods. Fat mass, lean mass, and bone mineral density in whole body, as well as femur and lumbar spine were evaluated with dual-energy X-ray absorptiometry. Muscle performance was assessed through isokinetic knee extension and flexion, countermovement jump, and sprint running. 25(OH)D was low (50.5?±? 12.8?nmol?l?1), whereas the values of bone turnover markers were markedly high (OC: 59.4?±? 18.6?µg?l?1; β-Ctx: 1075?±? 408?ng?l?1). All bone and muscle measurements were normal or above normal. 25(OH)D was not significantly correlated with most of the parameters of bone and muscle quality or function, except the knee extension time to peak torque (r ? =? ?0.50, p?=? .03). In conclusion, the level of vitamin D is markedly low in adolescent female soccer players during the winter in Sweden. However, vitamin D levels did not significantly correlate with measures of bone and muscle except a moderate correlation in time to peak torque in the knee extensors. The practical implication of low vitamin D levels in young growing female athletes remains unclear. 相似文献
139.
Jiří Baláš David Giles Leona Chrastinová Kateřina Kárníková Jan Kodejška Alžběta Hlaváčková 《Journal of sports sciences》2017,35(10):989-994
The aim of this study was to examine the effect of alterations in potential lead fall distance on the hormonal responses of rock climbers. Nine advanced female climbers completed two routes while clipping all (PRO-all) or half (PRO-½) of the fixed points of protection. Venous blood samples were analysed for total catecholamines, noradrenaline (norepinephrine), adrenaline (epinephrine), dopamine, lactate, cortisol and serotonin. Differences between the two conditions pre, immediately post and 15 min post climbing were assessed using a 2 × 3 repeated measures ANOVA. All hormones and blood lactate concentrations increased significantly (P < 0.05) immediately post climb, except for cortisol. Peak cortisol concentrations did not occur until 15 min post ascent. Further, significant interactions between climbing and clipping conditions were found for total catecholamines (890% of basal concentration in PRO-½ vs. 568% in PRO-all), noradrenaline (794% vs. 532%) and dopamine (500% vs. 210%). There were no significant interactions for adrenaline (1920% vs. 1045%), serotonin (150% vs. 127%) or lactate (329% vs. 279%). The study showed a greater catecholamine response with an increase in potential lead fall distance. The most pronounced increases seen in catecholamine concentration were reported for dopamine and noradrenaline. 相似文献
140.
External Quality Auditing in Sweden: Are Departments Affected? 总被引:1,自引:0,他引:1
Bjørn Stensaker 《Higher Education Quarterly》1999,53(4):353-368
The article studies the effects of the first round of quality audits in five higher education institutions in Sweden. Using the formal objectives of the audits as a starting point of the investigation, the article examines in which areas change, as experienced at the departmental level, seems to be achieved and where problems can be found. The results are then discussed in a broader context where experiences from quality audit and assessment processes in the UK are included, and where strengths and weaknesses of the current audit procedures in Sweden are identified. Some implications of the study, especially focusing on possible future improvements in the design of quality audits, are examined in the conclusion. 相似文献