A note on quasi-static thermal deflection of a thin clamped circular plate due to ramp-type heating of a concentric circular region of the upper face     

Snehanshu Kumar Roy Choudhuri 《Journal of The Franklin Institute》1973,296(3):213-219

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Effect of Oestrogen on Altering the Serum and Urinary Levels of Calcium,Phosphate and Magnesium in Hysterectomised Women Compared to Natural Menopausal South Indian Women: A Case Control Study     

Yeldose Sonu  S. S. Avinash  Sreekantha  K. Arun Kumar  M. Malathi  A. R. Shivashankara 《Indian journal of clinical biochemistry : IJCB》2016,31(3):326-331

Given the paucity of studies conducted to know the effect of suddenness and earlier onset of endocrinological changes associated with hysterectomy, on the serum and urinary levels of calcium, magnesium and phosphate the present study was conducted to compare the levels of calcium, magnesium and phosphate in serum and urine of hysterectomised and natural menopausal south Indian women. This is a cross-sectional observational study. The study included three groups of 30 healthy premenopausal, 30 early surgical menopausal and 30 natural post menopausal women. Women suffering from any endocrine disease were excluded. Analysis was performed in serum and urine sample. The levels of calcium, magnesium and phosphate in serum and calcium/creatinine, magnesium/creatinine and phosphate/creatinine ratio were estimated in urine by spectrophotometric method. Hysterectomised women (serum calcium: 8.7 ± 0.09 mg/dl; urine calcium/creatinine: 0.16 ± 0.02) have significantly low serum calcium (p < 0.001) and high urinary calcium/creatinine (p = 0.002) ratio and post menopausal women (serum magnesium: 2.1 ± 0.03; serum phosphate: 4.4 ± 0.16; urinary calcium/creatinine: 0.17 ± 0.02; urinary magnesium/creatinine: 0.09 ± 0.01) have significantly high serum magnesium (p = 0.016), serum phosphate (p = 0.043) and high urinary calcium/creatinine (p = 0.002), magnesium/creatinine ratio (p = 0.025) compared to healthy pre menopausal women. Post menopausal women (serum calcium: 9.1 ± 0.08) have significantly high serum calcium and phosphate compared to hysterectomised women (serum phosphate: 3.93 ± 0.11). Hysterectomised women have significantly low serum calcium, oestrogen and high urinary calcium/creatinine ratio compared to healthy premenopausal women and low serum calcium and low serum phosphate compared to natural postmenopausal women. Natural postmenopausal women had low serum oestrogen and high serum magnesium, serum phosphate, urinary calcium creatinine ratio and urinary magnesium creatinine ratio compared to healthy premenopausal women.  相似文献   

Science Education in Review: Response to the Secretary’s Summit of 2004     

David D. Kumar  Kent J. Crippen 《Journal of Science Education and Technology》2005,14(2):143-145

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Informatics Curricula and Teaching Methods     

Rahul Kumar 《Education and Information Technologies》2006,11(1):93-97

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Associations of epistemic beliefs in science and scientific reasoning in university students from Taiwan and India     

Fang-Ying Yang  Kaushal Kumar Bhagat  Chia-Hui Cheng 《International Journal of Science Education》2019,41(10):1347-1365

The purpose of this study was to compare the associations of epistemic beliefs in science, performance of scientific reasoning in university students from Taiwan and India, and the relations with their science learning experiences. A total of 126 university students including 67 from Taiwan and 59 from India who had science and mathematics backgrounds were involved in the study. Students’ epistemic beliefs in science were assessed by the SEV questionnaire, while their reasoning performance and learning experiences were prompted by open-ended questions and survey items. Content analysis was performed to analyze their scientific reasoning, and correlation analysis, t tests and ANOVA were applied to reveal the associations between variables. The results showed that students from both countries differed in epistemic beliefs in the dimensions of certainty, development and justification. While few students from either country performed successfully in identifying genuine evidence and giving full rebuttals, Taiwanese participants seemed to demonstrate slightly better scientific reasoning. It was found that the Indian students were more balanced in receiving structured and engaged learning experiences. Varying associations for the students from the different countries were found between epistemic beliefs and scientific reasoning performance, and between epistemic beliefs and science learning experiences.  相似文献   

Cyberkids: Children in the Information Age, Sarah L. Holloway and Gill Valentine     

Rahul Kumar 《Education and Information Technologies》2003,8(4):383-386

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Mathematics in ancient India     

Amartya Kumar Dutta 《Resonance》2004,9(1):61-63

Inadvertently, an earlier draft of this article got printed in the November 2003 issue and, since the new draft clarified some of the points, the section ‘Brahmagupta’s lemma and modern algebra’ of the final draft and a few small remarks are being reprinted for the reader’s convenience. The error is regretted.  相似文献   

Profiles of educators     

Krishna Kumar  Serge Wagner  Ananda W. P. Guruge  Miguel Soler Roca  Francisco Gomes de Matos 《Prospects》1989,19(4):591-619

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Āryabhata and axial rotation of Earth     

Amartya Kumar Dutta 《Resonance》2006,11(3):51-68

Āryabhata (born 476 CE) is regarded as a pioneer of mathematical astronomy in ancient India. In this three-part article, I shall discuss one important contribution of Āryabhata in astronomy involving the least technical background —the principle of axial rotation (Part 1) and computations on the sidereal day (Part 2). Portions of 4 verses, pertaining to Earth’s rotation, from his famous treatise Āryabhatīya will be quoted. In Part 3, I shall give a brief historical account on the concept of axial rotation of Earth.  相似文献   

Mathematics in ancient India     

Amartya Kumar Dutta 《Resonance》2002,7(4):4-19

In this series of articles, we intend to have a glimpse of some of the landmarks in ancient Indian mathematics with special emphasis on number theory. This issue features a brief overview of some of the high peaks of mathematics in ancient India. In the next part we shall describe Aryabhata’s general solution in integers of the equationax -by =c. In subsequent instalments we shall discuss in some detail two of the major contributions by Indians in number theory. The climax of the Indian achievements in algebra and number theory was their development of the ingeniouschakravala method for solving, in integers, the equation x² -Dy² = 1, erroneously known as the Pell equation. We shall later describe the partial solution of Brahmagupta and then the complete solution due to Jayadeva and Bhaskaracharya.  相似文献