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1.
Magana Alejandra J. Elluri Sindhura Dasgupta Chandan Seah Ying Ying Madamanchi Aasakiran Boutin Mireille 《Journal of Science Education and Technology》2019,28(4):382-398
Journal of Science Education and Technology - In science and engineering education, the use of heuristics has been introduced as a way of understanding the world, and as a way to approach... 相似文献
2.
Chandan Singh Dalawat 《Resonance》2009,14(12):1183-1205
The ancient unsolved problem of congruent numbers has been reduced to one of the major questions of contemporary arithmetic: the finiteness of the number of curves over Q which become isomorphic at every place to a given curve. We give an elementary introduction to congruent numbers and their conjectural characterisation, discuss local-to-global issues leading to the finiteness problem, and list a few results and conjectures in the arithmetic theory of elliptic curves. 相似文献
3.
Sarama Saha Chandan Sarkar Subhash Chandra Biswas R. Karim 《Indian journal of clinical biochemistry : IJCB》2008,23(3):262-266
Abnormal lipid profile is often found in women with Polycystic Ovary Syndrome. To assess the impact of abnormal lipid profile
on atherosclerosis in young Polycystic Ovary Syndrome women, carotid intima-media thickness as judged by B-mode ultrasonography
were done in 30 young (18–35 yrs) Polycystic Ovary Syndrome women and in similarly age-matched 30 apparently healthy controls.
Compared to controls, young Polycystic Ovary Syndrome women had significantly elevated serum total cholesterol, triglyceride
and LDL-C levels and carotid intima-media thickness. HDL-C level did not differ significantly between two groups of women.
In Polycystic Ovary Syndrome women carotid intima-media thickness was positively correlated with serum total cholesterol,
triglyceride and LDL-C and negatively correlated with serum HDL-C. Our study suggests that even young Polycystic Ovary Syndrome
women are prone to atherosclerosis from early age. 相似文献
4.
Qualitative analysis of unknown organic compounds is an essential part of the core curriculum for BSc and MSc students in chemistry. The functional group detection is a significant component of qualitative analysis. The present work describes the reason for the failure of Mulliken-Barker test for nitro compounds having carboxylic acid functionality and suggests a possible remedy. 相似文献
5.
The modern sensation the field of Library and Information Science is the word e-library where information's are stored in a digital format. It actually enables the use of the new emerging technique XML for transporting information over internet and thus nullifies the disadvantages (viz. rigid transaction set, fixed business rule, high cost, and slow pace) of previously used EDI (Electronic Data Interchange) technique. Keeping in mind the necessity of rapid and dynamic information explosion the library in the modern era should be universal. This concept of spreading a centralized system in a geographically dispersed system is known as distributed system. In this work we represent a model that is distributed in nature and information is transferred by means of XML. 相似文献
6.
Manaz Taleyarkhan Chandan Dasgupta John Mendoza Garcia Alejandra J. Magana 《Journal of Science Education and Technology》2018,27(4):334-347
Engineering design thinking is hard to teach and still harder to learn by novices primarily due to the undetermined nature of engineering problems that often results in multiple solutions. In this paper, we investigate the effect of teaching engineering design thinking to freshmen students by using a computer-aided Design (CAD) simulation software. We present a framework for characterizing different levels of engineering design thinking displayed by students who interacted with the CAD simulation software in the context of a collaborative assignment. This framework describes the presence of four levels of engineering design thinking—beginning designer, adept beginning designer, informed designer, adept informed designer. We present the characteristics associated with each of these four levels as they pertain to four engineering design strategies that students pursued in this study—understanding the design challenge, building knowledge, weighing options and making tradeoffs, and reflecting on the process. Students demonstrated significant improvements in two strategies—understanding the design challenge and building knowledge. We discuss the affordances of the CAD simulation tool along with the learning environment that potentially helped students move towards Adept informed designers while pursuing these design strategies. 相似文献
7.
In this paper, emphasis has been put on providing the result of a detailed simulation study on the dynamics and efficiency of a vector-controlled voltage source inverter (VSI)-fed surface-mounted permanent magnet synchronous motor (SPMSM) drive; which employs firstly a model-based loss-minimization algorithm (MLMA) and secondly a binary search-based online loss-minimization algorithm (BSOLMA), so as to reduce the total controllable electrical losses without much affecting the dynamic performance of the drive. The steady-state SPMSM model taking into account the core loss has been considered. The dynamic performances of the SPMSM drive employing individually the abovementioned loss minimization algorithms (LMAs) have been compared with that employing conventional zero d-axis current control (ZDCC) through extensive digital computer simulations. The simulation results show that efficiency of the drive enhances with the employment of the LMA. 相似文献
8.
Nabarun Mandal Debojyoti Bhattacharjee Jayanta Kumar Rout Anindya Dasgupta Gorachand Bhattacharya Chandan Sarkar Prasanta Kumar Gangopadhyaya 《Indian journal of clinical biochemistry : IJCB》2016,31(4):468-472
Wilson’s disease is a disease of abnormal copper metabolism in which free serum copper level is raised. The objective of the study was to determine, whether in Wilson disease, l-cysteine/l-cystine influx into RBC was decreased or not and the specific amino acid transporter affected by copper in normal human RBC. For l-cysteine/l-cystine influx, ten untreated cases, ten treated cases and ten age and sex matched healthy controls were recruited. To study the effect of copper on l-cysteine/l-cystine influx in RBC, 15 healthy subjects were selected. RBC GSH and l-cysteine/l-cystine influx were estimated by Beautler’s and Yildiz’s method respectively. In untreated cases, l-cysteine/l-cystine influx and erythrocyte GSH level were decreased showing that elevated level of free copper in serum or media decreased l-cysteine/l-cystine influx in human RBC. Copper treatment inhibited L amino acid transporter in normal RBC specifically. 相似文献
9.
This article qualitatively discusses the Curtin-Hammett principle without mathematical treatment of the kinetic model. We show how the practical application of this principle can be extended to tautomers of several compounds and to explain the diazotization of aniline. The concept of ‘kinetic quenching’ is also discussed as a system where the Curtin-Hammett principle is inapplicable. 相似文献
10.
In French science literature, the term dissymmetry appeared as early as in 1820, before Louis Pasteur. Pasteur, a French scientist, in his lecture ??Recherches sur la Dissymétrie Moléculaire des Produits Organiques Naturels?? in 1860 used the term dissymmetric which was translated in English as asymmetric. A methodical study of his work reveals that the choice of the word dissymmetry is ideal even in the context of present-day science. Strictly speaking, there should be no conflict between the two terms dissymmetry and asymmetry. 相似文献