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Search Results: 1 - 10 of 130619 matches for " V. Shweta "
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SAS-Pro: Simultaneous Residue Assignment and Structure Superposition for Protein Structure Alignment
Shweta B. Shah, Nikolaos V. Sahinidis
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0037493
Abstract: Protein structure alignment is the problem of determining an assignment between the amino-acid residues of two given proteins in a way that maximizes a measure of similarity between the two superimposed protein structures. By identifying geometric similarities, structure alignment algorithms provide critical insights into protein functional similarities. Existing structure alignment tools adopt a two-stage approach to structure alignment by decoupling and iterating between the assignment evaluation and structure superposition problems. We introduce a novel approach, SAS-Pro, which addresses the assignment evaluation and structure superposition simultaneously by formulating the alignment problem as a single bilevel optimization problem. The new formulation does not require the sequentiality constraints, thus generalizing the scope of the alignment methodology to include non-sequential protein alignments. We employ derivative-free optimization methodologies for searching for the global optimum of the highly nonlinear and non-differentiable RMSD function encountered in the proposed model. Alignments obtained with SAS-Pro have better RMSD values and larger lengths than those obtained from other alignment tools. For non-sequential alignment problems, SAS-Pro leads to alignments with high degree of similarity with known reference alignments. The source code of SAS-Pro is available for download at http://eudoxus.cheme.cmu.edu/saspro/SAS-?Pro.html.
CAIDM: Context Aware Intelligent Driver Model
Sriram Sridharan,V. Shweta,Animesh Manglik
International Journal of Soft Computing , 2012, DOI: 10.3923/ijscomp.2012.113.119
Abstract: Researchers present a novel approach to incorporate context awareness into the existing Intelligent Driver Model (IDM). Specifically the proposed model would like to introduce new context aware parameters to make the car following model adapted with real life scenario. Researchers would like to concentrate on the environment conditions, driver condition and the type of vehicle. The effectiveness of proposed approach is validated using mathematical calculations and graphs. One of the main improvements that will be brought about by the new proposed system is the context aware parameter. Context awareness for a system is very important as it makes it more informed about the situation where it is being put to use and hence its actions/results are custom made for that particular situation making it very accurate and apt.
Characterization and Application of Naturally Occurring Mineral Based Pigment in Surface Coating  [PDF]
Shweta Umale, Prakash Mahanwar
Journal of Minerals and Materials Characterization and Engineering (JMMCE) , 2012, DOI: 10.4236/jmmce.2012.1111117
Abstract: New naturally occurring mineral based pigment of general formula Hg2S have been processed and characterized for its application in surface coating. Various analytical protocol like XRD, FT-IR, SEM and CIE 1976 colour coordinate system have been performed for complete analysis of pigment. Characterizations using XRD, and CIE 1976 colour coordinate assessment reveal the formation of pigments displaying colours ranging from brick-red to dark-brown. The typical designed pigment samples have been evaluated for their mass tone/hiding power, tinting strength and weather resistance by coating on an MS steel panel. Optical, Chemical, Mechanical and performance properties of coating have been evaluated for its application. The results demonstrated that the dark-brown pigment obtained in the present study was found to be an interesting alternative to the existing classical toxic inorganic red pigments for surface coating applications.
Effect of LASER on the Synthesis of Gold Nanoparticles with Reference to Geometries  [PDF]
Shweta Yadav, Soam Prakash
Advances in Nanoparticles (ANP) , 2018, DOI: 10.4236/anp.2018.74006
Abstract: Problem Statement: In the current study the effort was being made to investigate the effect of LASER light on the shape and geometries of Gold Nanoparticles. Light is an important parameter that plays significant role in the formation of nanoparticles; in this study LASER lights of selected wavelengths and colors have been used for the exposure of Gold Nanoparticles. The possibilities to manipulate the geometries of Gold Nanoparticles by altering the colors and wavelengths of LASER have been studied with reference to their efficacy against Culex quinquefasciatus. Approach: In the experimental setup four black boxes are used with no exposure to light sources. Three LASER with selected wavelengths and colors were fixed in the boxes at a specific angle, and then the nanoparticle solution was allowed to react. The micrographs of the Gold nanoparticles have been evaluated through the Transmission Electron Microscope (TEM). Results: The TEM images have shown formation of different shapes of nanoparticles due to exposure in different colors and wavelengths of LASER. Thus it explains that the wavelength and colour of the light plays a decisive role in the formation of the shapes and geometries of the nanoparticles.
Antiretroviral treatment in resource-poor settings: A view from India
Vajpayee Madhu,Kaushik Shweta,Mojumdar Kamalika,Sreenivas V
Indian Journal of Medical Sciences , 2007,
Abstract: Context : The introduction of highly effective generic antiretroviral drugs at reduced cost has transformed the face of HIV/AIDS epidemic in developing countries like India. However, there is an urgent emphasis on developing and implementing guidelines for antiretroviral treatment monitoring by laboratory methods utilizing the available technologies in resource-limited settings. Aim : We studied the efficacy of antiretroviral treatment, adherence to therapy and motivation of patients for regular treatment monitoring by CD4 counts. Settings and Design :A longitudinal cohort study on an established cohort of 166 HIV-1-infected Indian individuals. Materials and Methods: Study subjects were followed up for the period from January 2002 to November 2006. Their clinical status and treatment regimen were recorded, and CD4 counts were performed at each visit. Statistical Analysis : Repeated-measures ANOVA was used to compute changes in median CD4 counts at each visit in the different treatment groups. Results : We observed a growing awareness and motivation for regular HIV disease monitoring among patients, accompanied by a trend of increasing median CD4 counts at all subsequent follow-up visits after initiation of antiretroviral treatment. Conclusions :The study gives an insight into the institutional efforts for the establishment of cohorts for longitudinal studies, which will help in designing effective treatment guidelines, thus providing impetus to the free public sector antiretroviral therapy program in India. Such formative research aims to fill the lacunae in the limited available data for the formulation of treatment-monitoring guidelines in resource-poor settings of developing countries like India.
Biometric Recognition Techniques A Review
SHWETA GAUR,V.A.SHAH,MANISH THAKKER
International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering , 2013,
Abstract: In today s world automation is encompassing virtually every walk of life and human control functions are delegated to technical equipment. No doubt this results in emerging requirement of highly reliable personal identification system for authenticated access of resources and to reject imposters. Traditional password based verification systems can be easily hacked when a password is divulged to an unauthorized user. A number of biometric techniques have been proposedfor personal identification by various researchers. Biometric includes something which one does not need to remember or carry a token. Biometric based personal authentication systems use physiological or behavioral traits of a person for recognition purpose. Physiological traits include fingerprint, face, hand geometry etc. and behavioral traits are speech, handwriting, key strokes etc. During past few years, there has been remarkable growth in biometric recognition technology due to the increasing requirement of highly reliable personal identification and authentication in a number of government and commercial applications. In this paper we present a comparative study of various biometric recognition techniques suggested for authentication purpose and to reject imposters.
Digital Evidence for Database Tamper Detection  [PDF]
Shweta Tripathi, Bandu Baburao Meshram
Journal of Information Security (JIS) , 2012, DOI: 10.4236/jis.2012.32014
Abstract: Most secure database is the one you know the most. Tamper detection compares the past and present status of the system and produces digital evidence for forensic analysis. Our focus is on different methods or identification of different locations in an oracle database for collecting the digital evidence for database tamper detection. Starting with the basics of oracle architecture, continuing with the basic steps of forensic analysis the paper elaborates the extraction of suspicious locations in oracle. As a forensic examiner, collecting digital evidence in a database is a key factor. Planned and a modelled way of examination will lead to a valid detection. Based on the literature survey conducted on different aspects of collecting digital evidence for database tamper detection, the paper proposes a block diagram which may guide a database forensic examiner to obtain the evidences.
Comparative Study on Bactericidal Effect of Silver Nanoparticles, Synthesized Using Green Technology, in Combination with Antibiotics on Salmonella Typhi  [PDF]
Shweta Rajawat, Mohammad Shums Qureshi
Journal of Biomaterials and Nanobiotechnology (JBNB) , 2012, DOI: 10.4236/jbnb.2012.34049
Abstract: In this work bactericidal study of silver nanoparticles was taken up in combination with two standard antibiotics, ampicillin and gentamycin, for Salmonella Typhi. The antibacterial activities of antibiotics were increased in the presence of AgNPs against test strains. The higher enhancing effect was observed for ampicillin in comparison to gentamicin against test strains. Silver nanoparticles were synthesized elctrolytically using silver wire of 99% purity as anode and carbon rod wrapped with LDPE as cathode. Silver nitrate [of Merck] of 0.01N is used as an electrolyte. Here tea extract is added as capping and mild reducing agent. The polyphenols theaflavins and thearubigins, present in tea perform the role of stabilizing or capping agents due to their bulky and steric nature. A brown coloured colloidal solution of silver nanoparticles is obtained. The as-synthesized silver nanoparticles were characterized using XRD, TEM and UV-Vis spectroscopy.
Influence of Fly Ash and Growth Regulator with Soil for Determination of Chlorophyll in Arachis hypogaea L.  [PDF]
Shweta Sao, Pankaj K. Sahu
American Journal of Plant Sciences (AJPS) , 2013, DOI: 10.4236/ajps.2013.49214
Abstract:

The present investigation was conducted to find out the effect of varying levels of fly ash and growth hormones on the determination of chlorophylls. The experiments were conducted in pots during 2009-2010 with Arachis hypogaea L. (groundnut) grown with different levels of fly ash concentration, and soil was used (various combinations) at Guru ghasidas University, Bilaspur (CG.) India. In fresh leaf, chlorophylls content varies in the plain soil from 0.29 to 0.64 mg g-1, which is less for photosynthetic activities. Arachis hypogaea L. showed maximum germination percentage, increasing leaf area, enhancement of root & shoot length, whereas Fly ash, bio fertilizers with growth hormone showed minimum values in all parameters. Results showed that, for combination of A to E, the value of chlorophyll ranged from 0.270 mg g-1 to 0.395 mg g-1

METAPHORICAL STUDY OF REVERSIBLE LOGIC GATES
SHWETA AGRAWAL
International Journal of Innovative Research in Computer and Communication Engineering , 2013,
Abstract: In today’s world power dissipation is the main problem in digital world; this problem can be reduced by using reversible logic gates. For high performance systems, low power and smaller area are the most important criteria. Area and speed are main factors which are conflicting i.e. if speed is improving it results in larger area, hence in this paper reversible logic gates are analyzed. The power dissipation by these gates is very low; ideally their internal power dissipation is zero because these gates do not loss information. Systems where low power dissipation is required reversible logic gates will be used in place of classical logical gates like AND, OR, NAND, NOR. Reversible logic provides an alternative that may overcome many of these problems in the future. By reducing the number of reversible logic gates one can minimize the quantum cost of these gates. Reversible logic finds its application in low power CMOS, quantum computing, nanotechnology, bio-information etc
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