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171.
172.
Matthew N. Ahmadi Karin A. Pfeiffer Stewart G. Trost 《Measurement in physical education and exercise science》2020,24(2):129-136
ABSTRACTThis study developed and evaluated machine learning algorithms to predict children’s physical activity category from raw accelerometer data collected at the hip. Fifty participants (mean age = 13.9 ± 3.0 y) completed 12 activity trials that were categorized into 5 categories: sedentary (SED), light household activities and games (LHHAG), moderate-vigorous games and sports (MVGS), walking (WALK), and running (RUN). Random Forest (RF) and Logistic Regression (LR) classifiers were trained with features extracted from the vector magnitude using 10?s non-overlapping windows. Classification accuracy was evaluated using leave-one-subject-out cross validation. Overall accuracy for the RF and LR classifiers was 95.7% and 94.3%, respectively. Classification accuracy was excellent for SED (96.3% – 98.1%), LHHAG (92.3% – 95.2%), WALK (94.5% – 97.1%), RUN (99.5% – 99.6%); and MVGS (87.5% – 92.7%). The results indicate that classifiers trained on features in the raw acceleration from the hip can be used for activity recognition in young people.Abbreviations: VM: Vector Magnitude; RF: Random Forest; LR: Logistic Regression; LOSO: Leave-One-Subject-Out 相似文献
173.
Dr. Karin McCallum 《Clearing house (Menasha, Wis.)》2013,86(6):264-265
Because of the Common Core State Standards there is a renewed emphasis on the importance of visual literacies in today's classrooms. Students need prior knowledge before approaching these types of texts. This article describes the results of one 6th-grade language arts class's engagement in pre-reading prior to viewing a theatrical performance. The study examined whether obtaining background knowledge through print can be used effectively to increase the knowledge of drama, visual literacy, and nonprint text. The study utilized an experimental control-group design; t-test results revealed that using pre-reading as a comprehension strategy is more effective than just viewing drama. In addition, factorial ANOVA results showed that the treatment did not signficantly interact with reading ability or gender. Overall, this 6th-grade class's comprehension skills were enhanced with the help of pre-reading. This study indicates that pre-reading is a powerful strategy that can build background knowledge and ultimately increase comprehension of visual literacy for all students, and it and offers insight for a larger study. 相似文献
174.
Carla Gerhard Andreas G. Klein Karin Schermelleh-Engel Helfried Moosbrugger Jana Gäde Holger Brandt 《Structural equation modeling》2013,20(2):276-287
This article investigates likelihood-based difference statistics for testing nonlinear effects in structural equation modeling using the latent moderated structural equations (LMS) approach. In addition to the standard difference statistic TD, 2 robust statistics have been developed in the literature to ensure valid results under the conditions of nonnormality or small sample sizes: the robust TDR and the “strictly positive” TDRP. These robust statistics have not been examined in combination with LMS yet. In 2 Monte Carlo studies we investigate the performance of these methods for testing quadratic or interaction effects subject to different sources of nonnormality, nonnormality due to the nonlinear terms, and nonnormality due to the distribution of the predictor variables. The results indicate that TD is preferable to both TDR and TDRP. Under the condition of strong nonlinear effects and nonnormal predictors, TDR often produced negative differences and TDRP showed no desirable power. 相似文献
175.
In two studies dissociations between reading and spelling skills were examined. Study 1 reports equally high prevalence rates for isolated deficits in reading (7%) or spelling (6%) in a representative sample (N = 2,029) of German-speaking elementary school children. In Study 2, children with isolated deficits were presented with the same words to read and spell. The double dissociation was replicated. Good readers/poor spellers named pseudohomophones as quickly as their corresponding words, and their phonological awareness skills were adequate, suggesting that their reading might be based on highly efficient decoding procedures. Poor readers/good spellers showed slow word naming and a clear slowing when reading pseudohomophones suggesting a reliance on intact orthographic representations in word reading. A deficit in rapid automatized naming in this group suggests problems in fast visual–verbal access. The profile of poor readers/poor spellers fits the double-deficit group in Wolf and Bowers's (1999) dyslexia theory. 相似文献
176.
The arts form an integral part of human education. Arts education contributes to the development of the individual’s expressive needs and interests. It serves to pass on cultural and aesthetic practices and enables active participation in the cultural life of society. Over the last years, the demand for data has been growing, and in 2012, the German Federal Ministry of Education and Research (BMBF), together with the Standing Conference of the Länder Ministers of Education (KMK), commissioned the German national report on education with a specific focus on “cultural and aesthetic education over the life-span”. The present contribution defines the scope of this thematic focus and presents an overview of available data sources for its operationalization. It describes the process of structuring the domain, the construction of statistics and indicators, and outlines ways for further improving the monitoring of arts education in Germany. 相似文献
177.
The overall aim of this article is to develop in-depth knowledge about the connection between outdoor experiences and moral attitudes towards nature. The study focuses on processes in which moral relations are at stake in encounters between students and nature. The purpose is to identify such events, describe their specific circumstances and clarify how moral relations are established in these events. The empirical material consists of video-recordings of activities in three different outdoor education practices. In order to identify and categorise moral situations, an analytical tool called the ethical tendency is used. This tool is based on Wittgenstein’s language game method. The findings show that in the investigated outdoor education practices, moral relations towards nature are established in several different ways. The article concludes with four educational implications: responsibility when dealing with moral reactions; bringing ethical questions to the fore; different educational conditions create different encounters with nature; and the consequences of different language games. 相似文献
178.
Helena Ackesjö Per Lindqvist Ulla Karin Nordänger 《Scandinavian Journal of Educational Research》2013,57(6):884-898
In 2014, a newly formed group of teachers graduated from Swedish universities. In addition to their qualification as leisure-time pedagogues, their degree includes teaching practical/aesthetical subjects in compulsory school. This group of teachers thus has to relate to dual professional identities and to maintain a balance between the socially oriented leisure-time centres and a goal- and results-driven school. In this article we describe their first two years after graduation, trying to get hold of their negotiation of professional identities and orientation in the professional landscape. Results shows that the graduates try to balance own ideals and hybrid professional intentions against traditional professional identities and labour market conditions and that position in a liminal phase might be crucial for the outcome. 相似文献
179.
180.
Harriet G. Williams Karin A. Pfeiffer Marsha Dowda Chevy Jeter Shaverra Jones Russell R. Pate 《Measurement in physical education and exercise science》2013,17(3):151-165
The purpose of this study was to develop a valid and reliable tool for use in assessing motor skills in preschool children in field-based settings. The development of the Children's Activity and Movement in Preschool Study Motor Skills Protocol included evidence of its reliability and validity for use in field-based environments as part of large epidemiological studies. Following pilot work, 297 children (3–5 years old) from 22 preschools were tested using the final version of the Children's Activity and Movement in Preschool Study Motor Skills Protocol and the Test of Gross Motor Development (2nd Edition). Reliability of the Children's Activity and Movement in Preschool Study Motor Skills Protocol and interobserver reliability were determined using intraclass correlation procedures (intraclass correlation coefficients; ANOVA). Concurrent validity was assessed using Pearson correlation coefficients to compare the Children's Activity and Movement in Preschool Study Motor Skills Protocol to the original Test of Gross Motor Development (2nd Edition). Results indicated that test reliability, interobserver reliability, and validity coefficients were all high, generally above R/r = .90. Significant age differences were found. Outcomes indicate that the Children's Activity and Movement in Preschool Study Motor Skills Protocol is an appropriate tool for assessing motor development of 3-, 4-, and 5-year-old children in field-based settings that are consistent with large-scale trials. 相似文献