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Search Results: 1 - 10 of 331537 matches for " Sharma S "
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First Principle Study of Cubic SrMO3 Perovskites (M = Ti, Zr, Mo, Rh, Ru)  [PDF]
Avinash Daga, Smita Sharma, K. S. Sharma
Journal of Modern Physics (JMP) , 2011, DOI: 10.4236/jmp.2011.28095
Abstract: Lattice parameter and corresponding total free energy have been computed for cubic SrMO3 perovskites (M = Ti, Zr, Mo, Rh, Ru) using the first principle approach within Density functional theory. The results have been calculated using local density approximation (LDA) method. It is found that the calculated lattice parameter for all transition metal oxides are in good agreement with the available experimental data. The total free energy corresponding to this lattice constant has been calculated along with different components of the total free energy. All these calculations have been carried out using ABINIT computer code.
Hyperacute thrombolysis with recombinant tissue plasminogen activator of acute ischemic stroke: Feasibility and effectivity from an Indian perspective
Sharma S,Sharma Nalini
Annals of Indian Academy of Neurology , 2008,
Abstract: Given the constraints of resources, thrombolysis for acute ischemic stroke (AIS) is under evaluation in developing countries like India, especially in areas such as western Utter Pradesh, where it is overly crowded and there is poor affordability. Aim: This study was done to evaluate recombinant tissue plasminogen activator r-tpa in acute ischemic stroke in hyper acute phase, in selected patients of western Utter Pradesh, in terms of feasibility and effectivity. Design: Open, non randomized study. Materials and Methods: Thirty two patients were classified using Trial of ORG 10172 in Acute Stroke treatment (TOAST) criteria (large artery atherosclerotic = 8; cardio embolic = 6; small vessel occlusion = 14; other determined etiology = 2; undetermined etiology = 2). The mean time to reach the hospital was 2 h (1.15-3.0), the mean door to CT scan 20 min (10-40) and door to r-tpa injection was 30 min (24-68). The National Institute of Health Stroke Scale (NIHSS) scores ranged from 11-22 (mean 15.5 +2.7). The dose of r-tpa administered was 0.9 mg/kg. Results: Twenty one patients (65.6%) showed significant improvement on the NIHSS score, at 48 h (4 points). (Mean change = 10; range = 4-17). At one month, 25 (78%) recorded improvement on the Barthel index (mean change = 45%). One developed frontal lobe hemorrhage and another developed recurrent stroke; one died of aspiration; and four showed no improvement. Modified Rankin score (m RS) was administered at the end of three months to 28 patients (90%); however, the rest could not be directly observed. The average modified Rankin Score was 1.2 (0-2). Conclusions: Hyperacute thrombolysis was found feasible and effective in selected patients with AIS from western Utter Pradesh and who had poor affordability.
Epalrestat, an aldose reductase inhibitor, in diabetic neuropathy: An Indian perspective
Sharma S,Sharma Nalini
Annals of Indian Academy of Neurology , 2008,
Abstract: Background: A number of diabetic patients with diabetic neuropathy, in India, were treated with epalrestat, an aldose reductase inhibitor. In this study, more than 2000 patients with diabetic neuropathy, who were treated with epalrestat for 3-12 months, were analyzed to assess the efficacy and the adverse reactions of the drug. Method: We analyzed the subjective symptoms (spontaneous pain, numbness, coldness and hypoesthesia) and the nerve function tests (motor nerve conduction velocity, sensory nerve conduction velocity and vibration threshold). Result: The improvement rate of the subjective symptoms was 75% (slightly improved or better) and that of the nerve function tests 36%. Adverse drug reactions were encountered in 52 (2.5%) of the 2190 patients, none of which was severe. Conclusion: Although data are limited, it is strongly suggested that epalrestat is a highly effective and safe agent for the treatment of diabetic neuropathy.
An adolescent girl with periodic hypersomnolence and megaphagia
Sharma S,Sharma Nalini
Journal of Pediatric Neurosciences , 2009,
Abstract:
ε-Optimality in Multivalued Optimization  [PDF]
S. K. Suneja, Megha Sharma
American Journal of Operations Research (AJOR) , 2013, DOI: 10.4236/ajor.2013.34039
Abstract:

In this paper we apply the directional derivative technique to characterize D-multifunction, quasi D-multifunction and use them to obtain ε-optimality for set valued vector optimization problem with multivalued maps. We introduce the notions of local and partial-ε-minimum (weak) point and study ε-optimality, ε-Lagrangian multiplier theorem and ε-duality results.

Solar Activity during the Rising Phase of Solar Cycle 24  [PDF]
Aradhna Sharma, S. R. Verma
International Journal of Astronomy and Astrophysics (IJAA) , 2013, DOI: 10.4236/ijaa.2013.33025
Abstract:

Solar activity refers to any natural phenomenon occurring on the sun such as sunspots, solar flare and coronal mass ejection etc. Such phenomena have their roots deep inside the sun, where the dynamo mechanism operates and fluid motions occur in a turbulent way. It is mainly driven by the variability of the sun’s magnetic field. The present paper studies the relation between various solar features during January 2009 to December 2011. A good correlation between various parameters indicates similar origin.

Modeling Crash Risk at Rail-Highway Grade Crossings by Track Class  [PDF]
Soumya Sharma, Srinivas S. Pulugurtha
Journal of Transportation Technologies (JTTs) , 2019, DOI: 10.4236/jtts.2019.93016
Abstract: The Federal Railroad Administration (FRA)’s Web Based Accident Prediction System (WBAPS) is used by federal, state and local agencies to get a preliminary idea on safety at a rail-highway grade crossing. It is an interactive and user-friendly tool used to make funding decisions. WBAPS is almost three decades old and involves a three-step approach making it difficult to interpret the contribution of the variables included in the model. It also does not directly account for regional/local developments and technological advancements pertaining to signals and signs implemented at rail-highway grade crossings. Further, characteristics of a rail-highway grade crossing vary by track class which is not explicitly considered by WBAPS. This research, therefore, examines and develops a method and models to estimate crashes at rail-highway grade crossings by track class using regional/local level data. The method and models developed for each track class as well as considering all track classes together are based on data for the state of North Carolina. Linear, as well as count models based on Poisson and Negative Binomial (NB) distributions, was tested for applicability. Negative binomial models were found to be the best fit for the data used in this research. Models for each track class have better goodness of fit statistics compared to the model considering data for all track classes together. This is primarily because traffic, design, and operational characteristics at rail-highway grade crossings are different for each track class. The findings from statistical models in this research are supported by model validation.
On the Stationary Convection of Thermohaline Problems of Veronis and Stern Types  [PDF]
Joginder S. Dhiman, Praveen K. Sharma, Poonam Sharma
Applied Mathematics (AM) , 2010, DOI: 10.4236/am.2010.15052
Abstract: The stability of thermohaline convection problems of Veronis and Stern types for stationary convection is studied for quite general nature of boundaries. It is shown by means of an appropriately chosen linear transformation, that in case of stationary convection the equations describing the eigenvalue problem for thermohaline convection problems are identical to equations describing the eigenvalue problem for classical Bénard convection problem. As a consequence, the values of the critical Rayleigh numbers for the onset of stationary convection in thermohaline convection problems are obtained. Also, necessary conditions for the validity of principle of exchange of stabilities for thermohaline convection problems are derived using variational principle.
Comparative Finite Element Analysis of Jaipur Foot and Polyurethane Foot  [PDF]
Priya Sharma, Shubhda Sharma, S. Vidhya, M. K. Mathur
Engineering (ENG) , 2013, DOI: 10.4236/eng.2013.510B106
Abstract:

FEA is amongst best methods that help users to solve complex problems. There are fixed number of nodes in each ele-ment of the model that define the element boundaries to which boundary condition and loads can be applied. The geo-metry of the structure, the load applications, stress and displacement gradients can be approximated in a accurate man-ner, if the mesh is finer. The problem with the foot was unusual cracks in JP Foot and early breakage of PU Foot due to crack propagation[1]. To solve this problem we modelled the foot using SolidWorks and performed FEA Analysis for single leg below knee amputee patients. After analysis, it has been concluded that JP Foot as compared to PU Foot has more stress bearing capacity but has less displacement threshold due to its material properties[2]. This work will lead to optimization of both the feet thus enhancing the durability of foot.

 

An unusual Monteggia type 2 fracture
S. Sharma
Journal of Orthopaedics and Traumatology , 2006, DOI: 10.1007/s10195-006-0130-0
Abstract: This paper reports an unusual and undescribed Monteggia variant which was not diagnosed at its initial presentation. An extensive literature search did not reveal any similar case reports. This case report re–emphasises the importance of relying on a line drawn along the neck of the radius on the radiograph, and ensuring that it intersects the capitellum to avoid missing any such rare Monteggia fractures.
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