The embedding theorems of Whitney and Nash     

Harish Seshadri  Kaushal Verma 《Resonance》2016,21(9):815-826

We begin by briefly motivating the idea of a manifold and then discuss the embedding theorems of Whitney and Nash that allow us to view these objects inside appropriately large Euclidean spaces.  相似文献   

A tribute to ‘unsung teachers’: teachers’ influences on students enrolling in STEM programs with the intent of entering STEM careers     

Cheryl J. Craig  Paige Evans  Rakesh Verma  Donna Stokes  Jing Li 《欧洲师范教育杂志》2019,42(3):335-358

This narrative inquiry examines teachers’ influences on undergraduate and graduate students who enrolled in STEM programs and intended to enter STEM careers. Three National Science Foundation (NSF) scholarship grants sat in the backdrop. Narrative exemplars were crafted using the interpretative tools of broadening, burrowing, storying and restorying, fictionalisation and serial interpretation. Three diverse students’ narratives constituted the science education cases: one from teacher education, another arising from cyber technology and a third involving cyber security. The influence of the university students’ former teachers cohered around five themes: 1) same program-different narratives, 2) in loco parentis, 3) counter stories, 4) learning in small moments, and 5) the importance of the liberal arts in STEM education. The students’ narratives form instructive models for their siblings and other students pursuing STEM degrees and careers. Most importantly, the multiperspectival stories of experiences capture the far-reaching impact of ‘unsung teachers’ whose long-term influence is greatly underestimated by the public.  相似文献   

Effect of increasing duration of diabetes mellitus type 2 on glycated hemoglobin and insulin sensitivity     

Meena Verma  Sangeeta Paneri  Preetha Badi  P. G. Raman 《Indian journal of clinical biochemistry : IJCB》2006,21(1):142-146

Non-insulin dependent diabetes mellitus (NIDDM) is the most rapidly growing chronic metabolic disorder in the world. With advancement in the age and duration of diabetes there is a gradual tendency for the level of blood sugar to rise along with a subsequent increase in the HbA1c as well as in the fasting insulin level. Whether this is an aging process or increased frequency of diabetes is still controversial. The correlation between glucose and insulin sensitivity is consistent with the idea that the degree of chronic hyperglycemia is a cause of excessive insulin resistance in type 2 diabetes, i.e. the insulin resistance which characterizes type 2 diabetes but not nondiabetic subjects matched for age, gender, family history and duration of diabetes. The study comprised a total of 76 subjects out of which 30 were normal, non-diabetic persons and the rest 46 were diabetics with different duration of time in years, after being diagnosed diabetic. Data was analyzed after dividing the subjects into four groups—Group 1 comprised of one year old diabetics, Group 2 was made up of those, who had diabetes, for the past 2–5 years, Group 3 included patients who were diabetic since more than 5 years and Group 4 included non-diabetics as the normal control group. The results obtained indicated that the HbA1c levels showed a significant increase with the duration of diabetes as well as the insulin level showed a significant correlation after adjustment for age, sex and duration of diabetes.  相似文献   

Role of bilirubin, vitamin C and ceruloplasmin as antioxidants in coronary artery disease [CAD]     

V. K. Verma  V. Ramesh  Satyendra Tewari  R. K. Gupta  Nakul Sinha  C. M. Pandey 《Indian journal of clinical biochemistry : IJCB》2005,20(2):68-74

A study has been carried out on 250 CAD patients to see how the serum levels of three antioxidants i.e., Vitamin C, Bilirubin and Ceruloplasmin are related to the CAD risk factors and characteristics in these patients. The number of severe category CAD patients declined by 7–18% with increasing serum levels of the three antioxidants and, triple vessel disease declined by 14–20%. A decline of 39% in Myocardial Infarction (MI) occurred with increasing serum Ceruloplasmin. Serum Ceruloplasmin was significantly lower in the MI group compared to the non MI group CAD patients. There was a steady and a significant decline in the mean values of serum levels of cholesterol, Triglyceride, VLDL cholesterol along with BMI with increasing serum level. The study indicates that with increasing serum levels of the three antioxidants studied, the % MI along with % Triple vessel disease and severity of CAD goes down suggesting that the modifiable risk factors have to be suitably modified in order to maintain a reasonably high level of these antioxidants, as the risk factors are inversely related to the serum antioxidant levels.  相似文献   

LWT–DSR based new robust framework for watermark extraction under intentional attack conditions     

Vivek Singh Verma  Rajib Kumar Jha 《Journal of The Franklin Institute》2017,354(14):6422-6449

This paper proposes a new watermarking approach using dynamic stochastic resonance (DSR) based tuning operation to extract the watermark logo from the watermarked image that has undergone different intentional and signal processing attacks. This method is intended to provide remedies from the shortcomings of the technique proposed by Lin et al. (2008), and invalidates the effect of intentional attacks recently designed by Meerwald et al. (2009). The algorithm incorporates three level image decomposition using lifting wavelet transform (LWT) and low-pass subband is utilized for data hiding purpose. Watermark bits are embedded into the blocks of non-overlapped wavelet coefficients of the cover image by quantizing the two maximum coefficients of the corresponding block. In watermark extraction process, the DSR is applied by performing the tuning operation on coefficient blocks of attacked watermarked image. It is a parameter dependent approach that enhances the performance of watermark extraction, where the parameters of DSR inherently depend on the image properties such as standard deviation or variance. As far as security is concerned, the randomization of wavelet coefficients, blocks, and watermark bits helps the framework to be more secure. The proposed technique is also examined against multiple watermarking attack and successfully proves its authenticity and ownership. Comparison of the proposed technique with recent techniques shows remarkable improvement in terms of robustness and security against various intentional, signal processing, and geometrical attacks.  相似文献   

Cartap and carbofuran induced alterations in serum lipid profile of Wistar rats     

Devendra K. Rai  Prashant Kumar Rai  Aradhna Gupta  Geeta Watal  Bechan Sharma 《Indian journal of clinical biochemistry : IJCB》2009,24(2):198-201

Wistar rats of 6–8 weeks in age weighing between 120–150 g were exposed to the fixed doses of each of the carbamate pesticides such as cartap (50% LD₅₀) and carbofuran (50% LD₅₀) as well as a combination of these two with 25% LD₅₀ of each for one week. The effect of treatments was studied in terms of serum lipid parameters such as high-density lipoprotein, total cholesterol, triglyceride, low-density lipoprotein and very low-density lipoprotein. Treatment with individual doses of carbofuran (50% LD₅₀) and cartap (50 % LD₅₀) caused significant alterations in the levels of serum lipid parameters. The pesticides treatment resulted in marked decrease in the level of serum high-density lipoprotein where as that of other lipids got significantly elevated. Further, the rats exhibited relatively higher impact of pesticides when treated with the compounds in combination (25 % LD₅₀ of each). The results indicated that these compounds when used together may exert enhanced effect on the levels of serum lipids in rat.  相似文献   

Calcium antagonist prevents calcium flux induced necrosis and apoptosis in ischemic reperfusion of rat liver     

Pronobesh Chattopadhyay  Nevneet Verma  Anurag Verma  Gunjan Shukla  Arun Kumar Wahi 《Indian journal of clinical biochemistry : IJCB》2008,23(4):356-360

  相似文献   

Pulse-width-modulated speed control of d.c. motors     

V.K. Verma  C.R. Baird  V.K. Aatre 《Journal of The Franklin Institute》1974,297(2):89-101

This paper deals with the analytical and experimental investigations of an open-loop pulse-width-modulated d.c. motor speed control system. The analysis is carried out by two different approaches, circuit approach and the lattice function approach. From the circuit approach, the relationship between the current-ripple-factor and the pulse width is obtained. The lattice function approach yields the relationship between pulse width and the speed variation. There is good correlation between the experimental and theoretical results.  相似文献   

Antinuclear Antibody Profiling in Patients of a Tertiary Care Centre in Central India     

Prishni Gupta  Pratishtha Agrawal  Neha Rani Verma  Seema Shah  Suprava Patel  Rachita Nanda  Eli Mohapatra 《Indian journal of clinical biochemistry : IJCB》2021,36(3):345

The incidence of autoimmune disorders that includes the connective tissue diseases has seen a rise in India in recent times. Antinuclear antibodies, the telltale sign of systemic autoimmune response, thus can be used as a screening tool and also to support the diagnosis of systemic autoimmune disease. The present retrospective cross- sectional analysis aimed to study the antinuclear antibodies profile (patterns and specific antibody reactivity) amongst suspected cases of auto-immune disorders at a tertiary care teaching hospital. The study retrieved and reviewed reports of 644 patients sent for ANA testing by indirect immunofluorescence assay over a period of 1 year by different specialty departments. Positive samples were further processed for anti-ds-DNA antibody and antibodies to extractable nuclear antigen. Data collected was statistically analysed. ANA pattern positivity was observed in 31% of cases and a positive antibody reactivity was seen in 66% of them. Female predominance (82%) was noted in both pattern positivity and antibody reactivity. High levels of pattern positivity and antibody reactivity was found in the young adults (45.9%). Amongst the ANA patterns, the nuclear homogenous pattern was found the commonest. The common antibodies associated with this pattern were anti-dsDNA and U1 Sm/RNP antibodies. A stronger fluorescence intensity on initial screening showed a higher confirmation rate for specific antibodies on immunoassay. High occurrence of positive ANA patterns in autoimmune disorders suggests its utilization as a screening tool for them and would also play an adjuvant to the diagnosis. Early knowledge about future autoimmunity will earn better prognostic achievements through better treatment interventions.  相似文献   

Tools of the profession submission (for AIAEE) European Seminar in Extension Education perspective of a first-time seminar participant     

Satish Verma 《The Journal of Agricultural Education and Extension》2013,19(4):255-258

Abstract

The threats to traditional cultural landscapes and the concomitant demands from society for remedial landscape management represent a new challenge for agricultural education. The research described here examined the extent to which relevant landscape management skills and knowledge are transferred to would-be farmers (if at all) within the Austrian agricultural school system. A plurilateral approach was taken, involving a standardised text evaluation of curricula (as defined in legislative documents), examination of further vocational training programmes for teachers, and investigation of the actual teaching situation in selected schools. This combination of methods produced a comprehensive overview of the situation in agricultural schools and academies with regard to landscape management teaching. The teaching programmes prescribed by law and the actual programmes carried out by teachers were compared with a theoretical ‘best-case’ programme for teaching landscape management, and this revealed considerable shortcomings in current teaching. The research also identified potential constraints to the integration of landscape management elements within the agricultural school system.  相似文献