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91.
Jason Lake Simon Augustus Kieran Austin Paul Comfort John McMahon Peter Mundy 《Journal of sports sciences》2013,31(23):2685-2690
ABSTRACTThe aim of this study was to assess the reliability and validity of the bar-mounted PUSH BandTM 2.0 to determine peak and mean velocity during the bench press exercise with a moderate (60% one repetition maximum [1RM]) and heavy (90% 1RM) load. We did this by simultaneously recording peak and mean velocity using the PUSH BandTM 2.0 and three-dimensional motion capture from participants bench pressing with 60% and 90% 1RM. We used ordinary least products regression to assess within-session reliability and whether the PUSH BandTM 2.0 could accurately predict motion capture velocity. Results showed that PUSH BandTM 2.0 and motion capture peak and mean velocity reliability was acceptable with both loads. While there was a tendency for the PUSH BandTM 2.0 to slightly overestimate peak and mean velocity, there was no fixed bias. However, mean velocity with 60 and 90% 1RM demonstrated proportional bias (differences between predicted and motion capture values increase with magnitude). Therefore, PUSH BandTM 2.0 peak velocity with 60 and 90% 1RM is valid, but mean velocity is not. 相似文献
92.
Stephen F. Burns David R. Broom Masashi Miyashita Claire Mundy 《Journal of sports sciences》2013,31(6):635-642
Abstract Ghrelin is a hormone that stimulates hunger. Intense exercise has been shown to temporarily suppress hunger after exercise. In the present study, we investigated whether post-exercise hunger suppression is mediated by reduced plasma total ghrelin concentrations. Nine men and nine women participated in the study. Their mean physical characteristics were as follows: age 24.8 (s x = 0.9) years, body mass index 22.9 (s x = 0.6) kg · m?2, maximal oxygen uptake ([Vdot]O2max) 57.7 (s x = 2.2) ml · kg?1 · min?1. The participants completed two 3-h trials (exercise and control) on separate days in a randomized balanced design after overnight fasts. The exercise trial involved a 1-h treadmill run at 73.5% of [Vdot]O2max followed by 2 h of rest. The control trial consisted of 3 h of rest. Blood samples were collected at 0, 0.5, 1, 1.5, 2, and 3 h. Total ghrelin concentrations were determined from plasma. Hunger was assessed following blood sampling using a 15-point scale. The data were analysed using repeated-measures analysis of variance. Hunger scores were lower in the exercise trial than in the control trial (trial, P = 0.009; time, P < 0.001; trial × time, P < 0.001). Plasma total ghrelin concentrations did not differ between trials. These findings indicate that treadmill running suppresses hunger but this effect is not mediated by changes in plasma total ghrelin concentration. 相似文献
93.
Two Web-based breastfeeding programs were developed to provide new parents with necessary information on proper breastfeeding techniques. One version was plain text and the other version combined text with graphics. The computer was viewed as a valuable learning tool. The breastfeeding program that contained graphics was preferred over the text-only program. Educators are encouraged to use Web-based graphic programs to provide breastfeeding education to new parents. 相似文献
94.
Nonverbal communication skills in Down syndrome children 总被引:4,自引:0,他引:4
The goal of this research was to examine the nonverbal communication competence of 18-48-month-old Down syndrome children. The results indicated that Downs children displayed strengths and weaknesses in nonverbal communication skills. Relative to MA matched normal children, they displayed a significant strength in nonverbal social interaction skills. However, they also displayed a significant deficit in nonverbal requests for objects or assistance with objects compared to normals. This pattern of strength and weakness in nonverbal skills appeared to be specific to Down syndrome since this pattern was not displayed by a comparison sample of non-Downs mentally retarded children. Nonverbal object-requesting skill was also significantly associated with a measure of expressive language in the Downs sample. This relation was notable because the Downs children also displayed a deficit in expressive language. Thus, the results of this study suggest that a deficit in expressive language is associated with a deficit in earlier-developing nonverbal requesting skill among Down syndrome children. 相似文献
95.
The technical adequacy of CBM maze-scores as indicators of reading level and growth for seventh-grade secondary-school students was examined. Participants were 452 Dutch students who completed weekly maze measures over a period of 23 weeks. Criterion measures were school level, dyslexia status, scores and growth on a standardized reading test. Results supported the technical adequacy of maze scores as indicators of reading level and growth. Alternate-form reliability coefficients were significant and intermediate to high. Mean maze scores showed significant increase over time, students’ growth trajectories differed, and students’ initial performance levels (intercepts) and growth rates (slopes) were not correlated. Maze reading level and growth were related to reading level and/or growth on criterion measures. A nonlinear model provided a better fit for the data than a linear model. Implications for use of CBM maze-scores for data-based decision-making are discussed. 相似文献
96.
Lisette Hornstra Kim Stroet Eva van Eijden Jeannette Goudsblom Claire Roskamp 《Educational Research and Evaluation》2018,24(3-5):324-345
ABSTRACTPrevious research has shown that teachers differentiate their behaviour based on their expectations of students. Self-determination theory (SDT) makes explicit how teacher behaviour relates to students’ motivation and engagement, namely, via need-supportive teaching. In the present study, we combined both research traditions and examined associations of teacher expectations with need-supportive teaching and thereby students’ motivation and engagement. Two-hundred-and-seventy-six secondary school students and their teachers (N?=?11) completed questionnaires. The results indicated that teacher expectations were moderately but positively associated with students’ intrinsic motivation and engagement, and negatively with amotivation. These relationships were fully mediated, although with small effect sizes, by need-supportive teaching. These findings highlight the value of combining research on teacher expectations and SDT, to gain further understanding of how teacher expectations may cause teachers to provide more need support to some students than to others, thereby affecting students’ motivation and engagement. 相似文献
97.
Claire Bonnard 《Gender and education》2016,28(4):581-598
Gender differences in wage expectations may affect investment in human capital and increase inequalities in the labour market. Our research based on a survey of first-year students at a French university aims to focus on expectations at the beginning of the career. Our results show that anticipated earnings differ significantly between men and women. One year after graduation, we find a gender gap in pay of 16%. A wage decomposition method indicates that most of this effect is due to anticipation of discrimination. Ten years after graduation, anticipated discrimination is still almost as dominant in explaining the gender gap in pay. Finally, using a survey of recent college graduates, we show that growth in the anticipated gender gap differs greatly from growth in the observed gender gap. Our findings highlight the importance of policies promoting higher educational aspirations for young women. Career guidance counselling for students may play a decisive role in contributing to give women more ambitious aspirations, which may in turn serve to reduce inequalities in the labour market. 相似文献
98.
Helyn Kim Chelsea A. K. Duran Claire E. Cameron David Grissmer 《Child development》2018,89(2):476-494
This study explored transactional associations among visuomotor integration, attention, fine motor coordination, and mathematics skills in a diverse sample of one hundred thirty‐five 5‐year‐olds (kindergarteners) and one hundred nineteen 6‐year‐olds (first graders) in the United States who were followed over the course of 2 school years. Associations were dynamic, with more reciprocal transactions occurring in kindergarten than in the later grades. Specifically, visuomotor integration and mathematics exhibited ongoing reciprocity in kindergarten and first grade, attention contributed to mathematics in kindergarten and first grade, mathematics contributed to attention across the kindergarten year only, and fine motor coordination contributed to mathematics indirectly, through visuomotor integration, across kindergarten and first grade. Implications of examining the hierarchical interrelations among processes underlying the development of children's mathematics skills are discussed. 相似文献
99.
Aisling Leavy Mairead Hourigan Claire Carroll 《International Journal of Science and Mathematics Education》2017,15(3):509-526
This study reports entry-level mathematics attitudes of pre-service primary teachers entering an initial teacher education (ITE) program one decade apart. Attitudes of 360 pre-service primary teachers were compared to 419 pre-service teachers entering the same college of education almost one decade later. The latter experienced reform school mathematics curricula compared to the earlier cohort who experienced traditional curricula. Attitudes were determined by administering Aiken’s Revised Mathematics Attitude Scale (Aiken, 1974). Analyses indicate generally positive attitudes on entry to ITE. The earlier cohort demonstrated greater Enjoyment of Mathematics while the later cohort exhibited higher scores on the Value of Mathematics scale. 相似文献
100.
Research indicates that teachers’ conceptions of and approaches to teaching with technology are central for the successful imple-mentation of educational technologies in higher education. This study advances this premise. We present a 10-year longitudinal study examining teachers’ conceptions of and approaches to teaching and learning with technology. Nine teachers on an online Bachelor of Science in Pharmacy and a Master of Pharmacy programme at a Swedish university were studied using a phenomenographic approach. Results showed clear differences between novice and experienced teachers. Although novice teachers initially held more teacher-focused conceptions, they demonstrated greater and more rapid change than experienced colleagues. Experienced teachers tended to exhibit little to no change in conceptions. Supporting conceptual change should, therefore, be a central component of professional development activities if a more effective use of educational technology is to be achieved. 相似文献