The RC circuit: An approach with Fourier transforms     

Mitrajyoti Ghosh 《Resonance》2016,21(11):1029-1042

In this article we shall mathematically analyse the Resistor-Capacitor (RC) circuit with the help of Fourier transforms (FT). This very general technique gives us a lot of insight into solving first order differential equations with source terms depending on time. In itself, the RC circuit is by far the most commonplace entity in modern electronics. But the method of FT is not the accepted custom for an electronic engineer, who is probably more comfortable working with complex impedances and phasors while solving problems in network analysis. In fact, what is used much more extensively is the Laplace transform. But a lot of things, (including the complex impedance itself, and some insight into complex analysis) can be understood better if we use the FT approach to solve the differential equations that come up in network analysis. The use of FT comes smoothly from first principles — precisely what we set out to demonstrate here.  相似文献   

Dalhousie,Charles Wood and the Education Despatch of 1854     

Suresh Chandra Ghosh 《History of education》2013,42(2):37-47

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Service Strategies for Higher Educational Institutions Based on Student Segmentation   总被引：2，自引：2，他引：0  

Amit K. Ghosh  Rajshekhar Javalgi  Thomas W. Whipple 《Journal of Marketing for HIGHER EDUCATION》2013,23(2):238-255

Over the last decade, higher education institutions in the U.S. have faced increased competition and expenditures coupled with declines in financial support. Furthermore, they often have been forced to cater to the needs of an increasingly diverse group of students and must design service strategies based on the unique needs of each group. This paper advocates the use of target marketing principles to effectively and efficiently allocate resources among the various groups. Student registration data from a large, urban, public university, which is routinely available at little cost, is used to identify five student segments. These segments include traditional students, non-traditional students, a sizable international student segment, a graduating segment, and a group of transferees. The unique needs of each segment are identified and appropriate service strategies are formulated for each segment. The diversity of the segments establish the utility of using target marketing principles for designing service strategies and the viability of using registration database for such a purpose.  相似文献   

Classroom     

C. K. Ghosh 《Resonance》2013,18(6):558-562

In this section of Resonance, we invite readers to pose questions likely to be raised in a classroom situation. We may suggest strategies for dealing with them, or invite responses, or both. “Classroom” is equally a forum for raising broader issues and sharing personal experiences and viewpoints on matters related to teaching and learning science.  相似文献   

Banking on the Present: The Ontological Rhetoric of Neo-Classical Economics and Its Relation to the 2008 Financial Crisis     

Joshua S. Hanan  Indradeep Ghosh  Kaleb W. Brooks 《Quarterly Journal of Speech》2013,99(2):139-162

This essay performs a rhetorical criticism of neo-classical economics, with particular attention to its methodological influence on a number of faulty mathematical models that lay at the epicenter of the 2008 financial crisis. Going beyond Goodnight and Green's mimetic conception of economic rhetoric, which positions rhetoric as a site of mediation between symbolic and material spirals, we argue that the rhetoric of neo-classicism is best understood as an “apparatus” that attempts to suture two ontologically incommensurable conceptions of time that we term intensive and extensive. We further argue that the hinge of this rhetorical apparatus centers on a kairotic tactic of arbitrage, which theoretically posits, at the same time that it negates, ontological market failure. We end by exploring rhetorical alternatives to neo-classical economics that take the internally contradictory structure of arbitrage to its emergent conclusions.  相似文献   

The effects of passive and active learning on student preference and performance in an undergraduate basic science course     

Minhas PS  Ghosh A  Swanzy L 《Anatomical sciences education》2012,5(4):200-207

Active learning is based on self-directed and autonomous teaching methods, whereas passive learning is grounded in instructor taught lectures. An animal physiology course was studied over a two-year period (Year 1, n = 42 students; Year 2, n = 30 students) to determine the effects of student-led seminar (andragogical) and lecture (pedagogical) teaching methods on students' retention of information and performance. For each year of the study, the course was divided into two time periods. The first half was dedicated to instructor-led lectures, followed by a control survey in which the students rated the efficiency of pedagogical learning on a five-point Likert scale from one (strongly disagree) to five (strongly agree). During the second period, students engaged in andragogical learning via peer-led seminars. An experimental survey was then administered to students using the same scale as above to determine students' preferred teaching method. Raw examination scores and survey results from both halves of the course were statistically analyzed by ANOVA with Newman-Keuls multiple comparison test. By the end of the study, student preference for peer-led seminars increased [mean ± SD: (2.47 ± 0.94)/(4.03 ± 1.36), P < 0.04], and examination scores significantly increased [mean ± SD: (73.91% ± 13.18)/(85.77 ± 5.22), P < 0.001]. A majority of students (68.8%) preferred a method that contained peer-led seminars and instructor-led lectures. These results may indicate that integration of active and passive learning into undergraduate courses may have greater benefit in terms of student preference and performance than either method alone.  相似文献   

No Evidence for Mutations that Deregulate GARS–AIRS–GART Protein Levels in Children with Down Syndrome     

Disha Banerjee  Debarati Ghosh  Anindita Chatterjee  Swagata Sinha  Krishnadas Nandagopal 《Indian journal of clinical biochemistry : IJCB》2012,27(1):46-51

GARS–AIRS–GART is crucial in studies of Down syndrome (DS)-related mental retardation due to its chromosomal location (21q22.1), involvement in de novo purine biosynthesis and over-expression in fetal DS brain postmortem samples. GARS–AIRS–GART regions important for structure–function were screened for mutations that might alter protein levels in DS patients. Mutation screening relied on multiplex/singleplex PCR-based amplification of genomic targets followed by amplicon size determination/fingerprinting. Serum protein samples were resolved by SDS-PAGE and immunoblotted with a GARS–AIRS–GART monoclonal antibody. No variation in amplicon size/fingerprints was observed in regions encoding the ATP-binding, active site residues of GARS, the structurally important glycine-rich loops of AIRS, substrate-binding, flexible and folate-binding loops of GART or the poly-adenylation signal sequences. The de novo occurrence or inheritance of large insertion/deletion/rearrangement-type mutations is therefore excluded. Immunoblots show presence of GARS–AIRS–GART protein in all patient samples, with no change in expression levels with respect to either sex or developmental age.  相似文献   

Strategic interaction among public school districts: Evidence on spatial interdependence in school inputs     

Soma Ghosh 《Economics of Education Review》2010

This paper provides evidence on strategic interaction among public school districts in Massachusetts. The open enrollment program in Massachusetts is unique in testing the strategic competition thesis because it allows students to attend public schools located outside their home district. For each student who transfers out, funds are deducted from the sending district's local aid distribution and added to the receiving district's local aid. Thus, school districts no longer have the assurance of a ready supply of students and funding, instead they have to compete with neighboring districts, and enact strategies that will help retain as well as attract more students. A spatial econometric framework is applied to disentangle the correlation due to strategic interaction from the one that is simply due to spatially correlated error shocks. The results show that public school districts respond positively to the expenditure decisions of neighboring districts, thereby acting strategically when setting their own spending levels.  相似文献   

Glossopterids: Suzerains of geologically past Indian forests     

Dipanjan Ghosh 《Resonance》2000,5(3):60-65

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Effect of insulin on serum lipids in relation to nutritional status in diabetics     

G. P. Das  B. Mandal  P. Ghosh  C. R. Maity 《Indian journal of clinical biochemistry : IJCB》1993,8(1):39-43

Serum levels of cholesterol, triglyceride, free fatty acid (FFA) and high density lipoprotein (HDL) cholesterol were studied in 10 undernourished and 10 better nourished diabetic patients at different periods of insulin treatment and in non-diabetic controls. Serum concentrations of cholesterol, triglyceride and FFA were significantly higher in untreated diabetic patients than in control but the elevated lipid levels gradually shifted towards normal on insulin treatment. The HDL cholesterol, on the other hand, was significantly lower in untreated diabetic subjects than those in controls and the HDL cholesterol also gradually modified on insulin therapy. However, the improvement of all the lipid parameters on insulin treatment was somewhat delayed in undernourished compared to those of better nourished diabetics. These results, therefore, suggest that malnutrition interferes with the serum lipid improvement in diabetics on insulin treatment and may make them more prone to develop vascular complications.  相似文献