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Ajay Sharma 《Science & Education》2016,25(5-6):717-723
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This paper reports research on the effects of variations in injection velocity and permeability on the heat transfer and flow
through a highly porous medium between two horizontal parallel plates situated at constant distance with constant suction
by the upper plate. Due to this type of variation in injection velocity and in permeability the flow becomes three dimensional.
The governing equations are solved by adopting complex variable notations to obtain the expressions for the velocity and temperature
field. The skin-friction along the main flow direction and rate of heat transfer are discussed with the help of graphs. 相似文献
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本研究采用Sharma等人编制的<教师融合教育自我效能感量表>以及<融合教育忧虑量表>对上海市110名特殊教育学校教师以及213名普通学校教师进行了调查,结果发现:两类教师对开展融合教育具有一定水平的自我效能感;特殊教育学校教师的自我效能感要高于普通学校教师;普通学校教师在开展融合教学以及与他人合作方面的自我效能感普遍低于特殊教育学校教师,但在行为管理方面,则与特殊教育学校教师没有差异;两类教师对开展融合教育抱有中等水平的忧虑,且融合教育自我效能感与其忧虑水平存在显著负相关,教师对开展残疾学生教学的自信心水平越高,则对融合教育的忧虑越少.教师融合教育忧虑程度对自我效能感的方差贡献率超过50%以上. 相似文献
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Derek A. Muller Manjula D. Sharma John Eklund Peter Reimann 《Instructional Science》2007,35(6):519-533
Recent research on principles of best practice for designing effective multimedia instruction has rarely taken into account
students’ alternative conceptions, which are known to strongly influence learning. The goal of this study was to determine
how well students of quantum mechanics could learn ‘vicariously’ by watching a student-tutor dialogue based on alternative
conceptions. Two video treatments were created to summarize key aspects of quantum tunneling, a fundamental quantum mechanical
phenomenon. One video depicted a student-tutor dialogue, incorporating many of the common alternative conceptions on the topic,
and resolving inconsistencies in reasoning through discussion. The other presented the same correct physics material in an
expository style without alternative conceptions. Second year physics students were randomly assigned to one of the two treatments
and were tested before and after watching the video during a lecture. Results show a statistically significant (p < .01) advantage for the learners in the dialogue treatment (d = 0.71). Follow-up interviews of students yielded insight into the affective and cognitive benefits of the dialogue video. 相似文献
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J. Baxi Kavita Sharma Rajbala Asha Mehta A. K. Pendse P. P. Singh 《Indian journal of clinical biochemistry : IJCB》1994,9(1):47-49
Evaluation of serum SOD and MDA level was done in 21 first episode renal stone formers, 9 recurrent stone formers, 20 patients with obstructive uropathy other than urolithiasis and 12 patients with urinary infection. Twenty-two healthy volunteers were taken as controls. The level of SOD in respective groups was 2.12±0.84, 2.78±0.85, 1.42±0.31, 1.98±0.70 and 2.32±0.62 units/ml and of MDA was 2.61±1.07, 2.69±1.15, 1.65±0.33, 1.33±0.34 and 1.55±0.48 n mol/ml respectively. The results indicate increased peroxidative stressin nephrolithiasis only. Since SOD level was normal in all groups, this increased peroxidative stress in nephrolithiasis should be due to factors other than this one. 相似文献
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O. P. Sanjay 《Indian journal of clinical biochemistry : IJCB》2004,19(1):40-44
Although potassium is critical for normal electro physiology, the associations between pre-operative serum potassium level
and peri-operative adverse events such as arrhythmias in cardiac surgery have not been examined in detail.
The objective of this study was to determine the prevalence of abnormal pre-operative serum potassium levels and whether such
levels were associated with adverse peri-operative events in 50 patients undergoing coronary artery bypass grafting. Intra-operative
and post-operative arrhythmias, the need for cardio-pulmonary resuscitation, cardiac death and death due to any cause prior
to discharge from the post-operative intensive care unit were studied. The incidence for adverse outcome was 0.5% for death,
0.5% for cardiac death and 2% for cardio pulmonary resuscitation in patients with hypokalemia (serum potassium level <3.5
meq. L−1). Hypokalemia was found to be a predictor of serious peri-operative (OR:2.2; 95% Cl: 1.2–4.1) and post-operative arrhythmias
(OR: 1.7;95%Cl: 1.0–2.7).
Pre-operative potassium repletion is low cost and low risk treatment measure and the data from this study suggests that screening
and repletion be considered in patients scheduled for cardiac surgery. 相似文献
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Research in Science Education - The first phase of this multiphase study involves modeling of college students’ thinking of friction at the microscopic level. Diagnostic interviews were... 相似文献