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Maturation of Human Fetal Responses to Vibroacoustic Stimulation 总被引:3,自引:0,他引:3
Maturation of human fetal response to vibroacoustic stimulation was examined in 60 fetuses from 23 to 36 weeks gestational age. Subjects received vibroacoustic or no-stimulus control trials (randomly assigned) while fetal heart rate (FHR) was recorded and movement was observed on real-time ultrasound scan. Initially, at 26-28 weeks, a small FHR deceleration response occurred; subsequently, FHR acceleration responses occurred. From 29 weeks, 83%-100% of subjects responded with an FHR acceleration > or = 10 BPM on the first vibrator trial and accelerations were observed on 83%-92% of all vibrator trials. From 26 to 36 weeks the percentage of fetuses responding with movement on the first vibrator trial increased from 58% to 100%; on all vibrator trials responses increased from 53% to 94%. It was concluded that maturation of human fetal response to vibroacoustic stimulation begins at about 26 weeks gestation, increases steadily over a 6-week period, and reaches maturity at about 32 weeks. 相似文献
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Albert E. Muir 《Research in higher education》1983,18(4):421-433
An interindustry model is used to estimate the impact of federal expenditures for academic R&D on the economy of New York State. Resulting economic activity through the multiplier process is estimated to be 3.7 times the level of the original federal spending. This impact on the state economy generates national and state tax revenues sufficient to offset the original outlay of taxpayers' money by the federal government, thereby supporting the case for continued support of higher education in periods of fiscal crisis. 相似文献
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THE NATIONAL CENTER on Low-Incidence Disabilities conducted a needs assessment of the research and training needs in the field of deaf education. A total of 331 professionals, parents, administrators, and university faculty responded to the survey. Overall, respondents indicated that the number-one priority was to educate administrators about services that are appropriate for students who are deaf or hard of hearing. The second most important concern was how to work within the education system to change it. The third priority was teaching reading strategies. Additional priorities are reported for all respondents, as well as comparisons among the different respondent groups. Implications of the results are presented. 相似文献
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Is Visually Guided Reaching in Early Infancy a Myth? 总被引:4,自引:0,他引:4
Rachel K. Clifton Darwin W. Muir Daniel H. Ashmead Marsha G. Clarkson 《Child development》1993,64(4):1099-1110
The issue examined was whether infants require sight of their hand when first beginning to reach for, contact, and grasp objects. 7 infants were repeatedly tested between 6 and 25 weeks of age. Each session consisted of 8 trials of objects presented in the light and 8 trials of glowing or sounding objects in complete darkness. Infants first contacted the object in both conditions at comparable ages (mean age for light, 12.3 weeks, and for dark, 11.9 weeks). Infants first grasped the object in the light at 16.0 weeks and in the dark at 14.7 weeks, a nonsignificant difference. Once contact was observed, infants continued to touch and grasp the objects in both light and dark throughout all sessions. Because infants could not see their hand or arm in the dark, their early success in contacting the glowing and sounding objects indicates that proprioceptive cues, not sight of the limb, guided their early reaching. Reaching in the light developed in parallel with reaching in the dark, suggesting that visual guidance of the hand is not necessary to achieve object contact either at the onset of successful reaching or in the succeeding weeks. 相似文献
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Tracey Muir Naomi Milthorpe Cathy Stone Janet Dyment Elizabeth Freeman Belinda Hopwood 《Distance Education》2019,40(2):262-277
Although there is ample research into student engagement in online learning, much of this investigates the student experience through surveys administered at a fixed point in time, usually at the exit point of a single unit of study or course. The study described in this paper, by contrast, aimed to understand online student engagement over a whole semester, guided by two overarching questions: What factors impact students’ engagement over a semester? What factors account for fluctuation in engagement levels over time? This paper presents results from weekly feedback on online education students’ engagement over the length of one semester at a regional Australian university. It also chronicles in more depth the experiences of one student across the same semester. The findings offer longitudinal accounts of student engagement, demonstrating that levels of engagement fluctuate and are influenced by a variety of factors. 相似文献