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261.
Advanced Structural Equation Modeling: Issues and Techniques. George A. Marcoulides and Randall E. Schumacker (Eds.). Mahwah, NJ: Lawrence Erlbaum Associates, 1996, 376 pages, $79.95  相似文献   
262.
Although there are many disagreements on the major causes of problems in the educational system in the United States, few would disagree that the importance of ensuring the success of our students is not only a moral obligation to our youth, but imperative to our national resilience. And, as a nation, we are responding to this urgent need. The College Completion Agenda mandates that 55% of the nation’s 25-to-35-year olds will be degree holders by the year 2025 (Lee & Rawls, 2010). But how do we accomplish the ambitious challenge and a necessary aspiration to elevate America’s status as a world leader in educational attainment among its citizenry? Innovative ideas and technologies that can counterbalance the barriers that threaten student success must be identified and advanced. The purpose of this article is to discuss the opportunity to leverage the marvel of online phenomena and technology in innovative ways to help students reach their full potential. Specifically, we introduce a new conceptual tool that replicates the power of social networking online matching services to link student learning preference with faculty instructional style.  相似文献   
263.
Articulation between two-year colleges and universities provides a critical opportunity for potential students. Most institutions declare their support of articulation; however, the visibility of this support to potential students is inconsistent at best. Articulation agreements that are visible and easily understood by potential students serve as a motivation to the pursuit of higher education. Conversely, the lack of a complete, visible path to a baccalaureate degree is a powerful deterrent to enrollment. For this study, articulation is a coordinated effort and process to support efficient transfer between institutions of higher education. (DeMott, 1999 DeMott , J. ( 1999 ). Seven steps to articulation success . High School Magazine , 6 , 2224 . [Google Scholar]). The purpose of this study is to explore the general visibility of existing articulation opportunities at two-year colleges. The visibility of articulation agreements is a critical practical factor in their potential positive impact on student behavior and success.  相似文献   
264.
265.
Abstract

This essay reads two differing conceptions of subjectivity in Frantz Fanon's work as corresponding to a shift in subjective orientation in certain moments of crisis, from what I term a unified individual – the subject of psychoanalysis – to a dispersed subject, the frenzied participant in collective activity. I believe that such a potential duality within the subject is best adopted when analysing Fanon's oeuvre, as well as when examining a subject's behaviour as participant in forms of unstructured collective protest such as rioting. Whereas the unified subject of psychoanalysis best expresses the consciously self-reflective individual in society, the dispersed subject expresses a subjectivity operating in excess of individualism. This dispersed subject acts collectively, as an object moving in tandem with other objects, without individual reflection. I argue that this shift comprises the initial spark of insurrection suggested in Fanon's work, the moment in which he sees the people pitched ‘in a single direction, from which there is no turning back’; and what Jean-Paul Sartre calls the explosive moment of ‘conflagration’. The two subject positions between which the subject shifts exist as two potential sides of every subject and comprise the ‘Manichean’ world in which Fanon's subject is entrenched.  相似文献   
266.
The study tested the effect of aerobic exercise training on executive function in overweight children. Ninety-four sedentary, overweight but otherwise healthy children (mean age = 9.2 years, body mass index ? 85th percentile) were randomized to a low-dose (20 min/day exercise), high-dose (40 min/day exercise), or control condition. Exercise sessions met 5 days/week for 15 weeks. The Cognitive Assessment System (CAS), a standardized test of cognitive processes, was administered individually before and following intervention. Analysis of covariance on posttest scores revealed effects on executive function. Group differences emerged for the CAS Planning scale (p = .03). Planning scores for the high-dose group were significantly greater than those of the control group. Exercise may prove to be a simple, yet important, method of enhancing aspects of children's mental functioning that are central to cognitive and social development.  相似文献   
267.
Abstract

The purpose of the present study was to assess the effectiveness of the triad components (amenorrhoea, disordered eating, and osteoporosis) in identifying physically active women at risk of long-term health problems. Eighty-two females (mean age 31.1 years, s = 6.7; body mass 58.4 kg, s = 6.6; stature 1.65 m, s = 0.06) completed training, menstrual, and dietary questionnaires. Bone mineral density and size-adjusted bone mineral density were assessed at the femoral neck and lumbar spine using dual energy X-ray absorptiometry. Seventy-eight percent of participants were eumenorrhoeic, 20% were oligomenorrhoeic, and 2% were amenorrhoeic. Thirty-six percent and 55% reported disordered eating practices in the present and past respectively. Eighty-one percent, 17%, and 2% were classified as normal, osteopaenic, and osteoporotic at the femoral neck respectively; 92% were normal, 7% osteopaenic, and 1% osteoporotic at the lumbar spine. No significant differences in femoral neck size-adjusted bone mineral density were observed between eumenorrhoeic and oligo/amenorrhoeic participants (F 2,80 = 0.119, P = 0.73); eumenorrhoeic participants had significantly greater lumbar spine size-adjusted bone mineral density (F 2,80 = 9.79, P = 0.003). Disordered eating participants had significantly lower femoral neck size-adjusted bone mineral density than those reporting no disordered eating (F 2,80 = 13.816, P = 0.000). Twenty-two percent of participants fulfilled triad criteria, while 55% were “at risk” of long-term health problems. An accumulation of conditions resulted in lower lumbar spine size-adjusted bone mineral density (F 1,80 = 6.074, P = 0.004). The current triad components do not identify all women “at risk” and more appropriate criteria such as exercise-related menstrual alterations, disordered eating, and osteopaenia are suggested.  相似文献   
268.
Abstract

Since [Vdot]O2 max (ml/minute · kg body weight) is known to be the primary determinant of work capacity in weight-bearing exercise, the quantification of sex-specific factors influencing aerobic capacity is necessary if appropriate work capacity and endurance performance expectations and standards are to be developed for men and women. Yet, due to varying procedures and sample characteristics, large discrepancies exist among studies concerning the magnitude of the sex difference in [Vdot]O2 max. The purpose of this article is to provide an integrative review of the research comparing [Vdot]O2 max in men and women using the meta-analytic strategy proposed by Glass (1976). An overall estimate of the magnitude of the sex effect for each of three expressions of [Vdot]O2 max is provided. When removing the variability in aerobic capacity due to body size and body fatness, the magnitude of difference in [Vdot]O2 max between men and women is substantially reduced. When expressed relative to fat-free weight, the [Vdot]O2 max values of the males are, on the average, 12 to 15% higher than those of the females. Sex-specific differences in relative hemoglobin content may be responsible for a part of this remaining difference. However, a substantial portion of the sex difference in [Vdot]O2 max (ml/minute · kg fat-free weight) is probably attributable to gender-associated differences in level of physical activity/conditioning. The ability to clearly identify the sex-related components of aerobic capacity is an objective warranting further investigation.  相似文献   
269.
There is evidence from previous cross-sectional studies that high volumes of certain sports, including running, swimming and cycling, may have a negative impact on bone mineral density. The aim of the present study was to evaluate prospectively the effects of high athletic training in individuals who engage in high volumes of all three of these activities (triathletes). Bone mineral density for the total body, arms and legs was determined by dual-energy X-ray absorptiometry in 21 competitive triathletes (9 men, 12 women) at the beginning of the training season and 24 weeks later. Age, body mass index, calcium intake and training volume were also recorded to examine potential mediators of bone mineral density change. Men had greater bone mineral density at all sites than women. No significant changes were observed over the 24 weeks for either total body or leg bone mineral density. Bone mineral density in both arms increased by approximately 2% in men ( P ? 0.03), but no change was observed for women. Change in bone mineral density at all sites was unrelated to age, body mass index, calcium intake and training volume. The results suggest that adverse changes in bone mineral density do not occur over the course of 6 months of training in competitive triathletes.  相似文献   
270.
Physical education teachers and the programs that prepare them find themselves in the early part of the 21st century in a public policy environment that differs significantly from that of the 20th century. This policy environment is grounded in an ideology that postulates that schools and teachers, rather than social forces, should be held responsible for academic outcomes, and in turn, economic success. For the first time, physical education teachers are being held accountable for student learning in the same way as their classroom peers. Improving the effectiveness of teachers is seen as the primary mechanism for improving student learning. In discussing how teaching effectiveness has evolved, I describe a relationship among the process–product paradigm, the ecological paradigm, and a neo-ecological paradigm called the instructional core. The latter paradigm extends our understanding of teaching effectiveness in new ways by describing the dynamic and interdependent relationship among teacher, student, and content in the gymnasium. It has significant implications for the professional development of teachers and the conduct of teaching effectiveness research. I conclude by discussing why content is so critical to conceptions of teaching effectiveness.  相似文献   
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