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MHD Slip Flow past a Shrinking Sheet

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Applied Mathematics 2013年第3期4卷 574-581页

作者： santosh Chaudhary Pradeep kumar Malaviya National Institute of Technology Jaipur Rajasthan India

An analysis is made for the steady two-dimensional laminar boundary layer flow of a viscous, incompressible, electrically conducting fluid near a stagnation point past a shrinking sheet with slip in the presence of a magnetic field. The governing boundary layer equations are transformed to ordinary differential equations by taking suitable similarity variables and solved numerically by Shooting method. The effects of the various parameters such as velocity ratio parameter, slip parameter, Prandtl number, Eckert number and magnetic parameter for velocity and temperature distributions have been discussed in detail through graphical representation.

关键词： MHD Boundary Layer Slip Flow Shrinking Sheet

Unsteady Magnetohydrodynamic Boundary Layer Flow near the Stagnation Point towards a Shrinking Surface

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Journal of Applied Mathematics and Physics 2015年第7期3卷 921-930页

作者： santosh Chaudhary Pradeep kumar Department of Mathematics Malaviya National Institute of Technology Jaipur India

The unsteady two-dimensional, laminar flow of a viscous, incompressible, electrically conducting fluid towards a shrinking surface in the presence of a uniform transverse magnetic field is studied. Taking suitable similarity variables, the governing boundary layer equations are transformed to ordinary differential equations and solved numerically by a perturbation technique for a small magnetic parameter. The effects of various parameters such as unsteadiness parameter, velocity parameter, magnetic parameter, Prandtl number and Eckert number for velocity and temperature distributions along with local Skin friction coefficient and local Nusselt number have been discussed in detail through numerical and graphical representations.

关键词： Unsteady Flow Magnetohydrodynamic Boundary Layer Stagnation Point Shrinking Surface

Modification of structural and dielectric properties of polycrystalline Gd-doped BFO–PZO

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Journal of Advanced Dielectrics 2018年第5期8卷 1-21页

作者： Ambika Ray Banarji Behera Tanmoy Basuy Saumitra Vajandar santosh kumar Satpathy Pratibindhya Nayak Material Research Laboratory School of Physics Sambalpur UniversityJyoti Vihar BurlaOdisha 768019India Centre for Advanced 2D Materials National University of Singapore Singapore 117546Singapore Centre for Ion Beam Applications National University of Singapore Singapore 117542Singapore Department of Physics School of Applied Science Centurion University of Technology and Management BhubaneswarOdisha 752050India

(1-y)(BiFe_(1-x)GdxO_(3))–y(PbZrO3)composites(y=0:5),having four different Gd concentrations(x=0:05,0.1,0.15,and 0.2),were synthesized and their structural,dielectric,and ferroelectric properties have been studied using different characterization *** addition,to investigate the effect of ion implantation on the microstructure and dielectric properties,these composites were exposed to 2 MeV He+-*** of the structure,surface morphology and electrical properties of the samples before and after ion exposure were demonstrated using powder X-ray diffraction(XRD),scanning electron microscopy(SEM)technique,and LCR *** compositional analysis was carried out using energy dispersive X-ray spectrometry(EDS).XRD results demonstrated a decrease in the intensity profile of the dominant peak by a factor of 6 showing a degradation of the ***–Hall(WH)plots reveal reduction in the grain size after irradiation along with an increase in strain and dislocation density.A decrease in the dielectric constant and loss has been recorded after ion beam exposure with reduction in ac conductivity *** contribution of grain and grain boundary effect in conduction mechanism has been addressed using Nyquist *** the samples demonstrate a lossy ferroelectric loop which shows a clear modification upon *** role of structural defects modifying the physical properties of the composite materials is discussed in this work.

关键词： Ion beam irradiation defects dielectric properties ferroelectricity.

Mineralogy, Geochemistry and Palaeomagnetism of Mafic Dykes from Kumaun Lesser Himalaya: Implication on Petrogenesis, Tectonic Setting and Timing of Mafic Magmatism in Northern Part of Indian Lithosphere

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Acta Geologica Sinica(English Edition) 2016年第S1期90卷 120-121页

作者： santosh kumar N.Surdas Singh S.K.Patil Department of Geology Kumaun University Dr.K.S.Krishnan Geomagnetic Research Laboratory

Occurrence of mafic dykes in Himalaya has been intriguing and debated since long because of its difficulty to ascent and emplacement through a thickened *** dykes in Kumaun Lesser Himalaya(KLH)of central Indian

关键词： Geochemistry and Palaeomagnetism of Mafic Dykes from Kumaun Lesser Himalaya Mineralogy Tectonic Setting and Timing of Mafic Magmatism in Northern Part of Indian Lithosphere

A Time Dependent Model for Image Denoising

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Journal of Signal and Information Processing 2015年第1期6卷 28-38页

作者： santosh kumar Mohammad Kalimuddin Ahmad Department of Mathematics Aligarh Muslim University Aligarh India

In this paper, we propose a new time dependent model for solving total variation (TV) minimization problem in image denoising. The main idea is to apply a priori smoothness on the solution image. This is a constrained optimization type of numerical algorithm for removing noise from images. The constraints are imposed using Lagrange’s multipliers and the solution is obtained using the gradient projection method. 1D and 2D numerical experimental results by explicit numerical schemes are discussed.

关键词： Total Variation Image Denoising Signal Denoising

Measuring Effectiveness of Health Program Intervention in the Field

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Intelligent Information Management 2012年第5期4卷 194-206页

作者： Om Prakash Singh santosh kumar Indian Institute of Health Management Research Jaipur India Suresh Gyan Vihar University Jaipur India

Improving and sustaining successful public health interventions relies increasingly on the ability to identify the key components of an intervention that are effective, to identify for whom the intervention is effective, and to identify under what conditions the intervention is effective. Bayesian probability an “advanced” experimental design framework of methodology is used in the study to develop a systematic tool that can assist health care managers and field workers in measuring effectiveness of health program intervention and systematically assess the components of programs to be applied to design program improvements and to advocate for resources. The study focuses on essential management elements of the health system that must be in place to ensure the effectiveness of IMNCI intervention. Early experiences with IMNCI implemented led to greater awareness of the need to improve drug delivery, support for effective planning and management at all levels and address issues related to the organization of work at health facilities. The efficacy of IMNCI program from the experience of experts and specialists working in the state is 0.67 and probability of effective- ness of all management components in the study is 58%. Overall the standard assessment tool used predicts success of around 39% for the IMNCI intervention implemented in current situation in Rajasthan. Training management component carried the highest weight-age of 21% with 73% probability of being effective in the state. Human resource management has weight-age of 13% with 53% probability of being effective in current scenario. Monitoring and evaluation carried a weight-age of 11% with only 33% probability of being effective. Operational planning carried a weight-age of 9% with 100% probability of being effectively managed. Supply management carried a weight-age of 8% with zero probability of being effective in the current field scenario. In the study, each question that received low score identifies it

关键词： Effectiveness Efficacy Performance Evaluation Measuring Capacity Building of Health Interventions

Object Oriented Query Response Time for UML Models

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Journal of Software Engineering and Applications 2012年第7期5卷 508-512页

作者： Vipin Saxena santosh kumar Department of Computer Science Babasaheb Bhimrao Ambedkar University Lucknow India

Nowadays, the size of database of any business organization is increasing and many of the companies are shifted the old structured database into the object oriented database. Due to increase of size of database complexity of database is increasing therefore, it is necessary to optimize the object oriented query response time from the complex object oriented database. In the present paper, a real case study of Life Insurance Corporation of India is taken and sample object oriented database is designed by the use of SQL Server 2008. A UML model is designed for computing the object oriented query response time. Table and graph are also represented for the computed records in five runs.

关键词： UML Object Orientation Class Diagram Sequence Diagram SQL Server

Geochemical systematics of the Mauranipur-Babina greenstone belt,Bundelkhand Craton,Central India:Insights on Neoarchean mantle plume-arc accretion and crustal evolution

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Geoscience Frontiers 2018年第3期9卷 769-788页

作者： S.P.Singh K.S.V.Subramanyam C.Manikyamba M.santosh M.Rajanikanta Singh B.Chandan kumar Department of Geology Institute of Earth SciencesBundelkhand UniversityJhansiU.P284128India CSIR-National Geophysical Research Institute Uppal RoadHyderabad500007India Department of Earth Sciences University of AdelaideAustralia School of Earth Science&Resources China University of GeosciencesBeijingChina Department of Geology Central University of KeralaKasaragodKerala671316India

The Neoarchean Bundelkhand greenstone sequences at Mauranipur and Babina areas within the Bundelkhand Gneissic Complex preserve a variety of magmatic rocks such as komatiitic basalts, basalts,felsic volcanic rocks and high-Mg andesites belonging to the Baragaon, Raspahari and Koti *** intrusive and extrusive komatiitic basalts are characterized by low SiO_2(39-53 wt.%), high MgO(18-25 wt.%).moderately high Fe_2O_3(7.1-11.6 wt.%), Al_2O_3(4.5-12.0 wt.%), and TiO_2(0.4-1.23 wt.%)with super to subchondritic(Gd/Yb)N ratios indicating garnet control on the melts. The intrusive komatiitic suite of Ti-enriched and Al-depleted type possesses predominant negative Eu and positive Nb, Ti and Y anomalies. The chemical composition of basalts classifies them into three types with varying SiO_2, TiO_2, MgO, Fe_2O_3, Al_2O_3 and CaO. At similar SiO_2 content of type Ⅰ and Ⅲ basalts, the type II basalts show slightly high Al_2O_3 and Fe_2O_3 contents. Significant negative anomalies of Nb, Zr, Hf and Ti, slightly enriched LREE with relatively flat HREE and low ∑REE contents are observed in type Ⅰ and Ⅱ basalts. TypeⅢ basalts show high Zr/Nb ratios(9.8-10.4), TiO_2(1.97-2.04 wt.%), but possess strikingly flat Zr, Hf, Y and Yb and are uncontaminated. Andesites from Agar and Koti have high SiO_2(55-64 wt.%), moderate TiO_2(0.4-0.7 wt.%), slightly low Al_2O_3(7-11.9 wt.%), medium to high MgO(3-8 wt.%) and CaO contents(10-17 wt.%). Anomalously high Cr, Co and Ni contents are observed in the Koti rhyolites. Tholeiitic to calc alkaline affinity of mafic-felsic volcanic rocks and basalt-andesite dacite-rhyolite differentiation indicate a mature arc and thickened crust during the advanced stage of the evolution of Neoarchean Bundelkhand greenstone belt in a convergent tectonic setting where the melts were derived from partial melting of thick basaltic crust metamorphosed to amphibolite-eclogite facies. The trace element systematics suggest the presence of arc-back arc association w

关键词： Bundelkhand craton Greenstone belts Mantle dynamics Plume-arc accretion Neoarchean crustal evolution

Defect induced room-temperature ferromagnetism and enhanced photocatalytic activity in Ni-doped ZnO synthesized by electrodeposition

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Chinese Physics B 2020年第10期29卷 566-572页

作者： Deepika Raju kumar Ritesh kumar Kamdeo Prasad Yadav Pratyush Vaibhav Seema Sharma Rakesh kumar Singh santosh kumar College o f Commerce Arts and SciencePatna.BiharIndia Jaypee University o f Engineering and Technology GunaMadhya PradeshIndia Anugrah Narayan College PatnaBiharIndia Aryabhatta Knowledge University PatnaBiharIndia

Zn0.90Ni0.10O nanoparticles have been synthesized by single-bath two-electrode electrodeposition at constant voltage. X-ray diffraction, UV vis and photoluminescence studies reveal that a single-phase polycrystalline hcp wurtzite crystal structure of ZnO is evolved. The material consists of a large number of defects such as oxygen vacancy (Ov) and zinc interstitial (Zi). The magnetization study reveals that the sample exhibits room-temperature global ferromagnetism and the ferromagnetic ordering seems to be defect induced via bound magnetic polaron mechanism, and double exchange is also expected to have played role. Interesting optoelectronic properties have been found in the synthesized sample and the material seems to be a potential candidate to be used as a UV sensor. Such a transition metal doped ZnO based dilute magnetic semiconducting system exhibiting room-temperature ferromagnetism is likely to be first of its kind in the sense that such materials have not yet been reported to be synthesized by the simple method of electrodeposition to the best of our knowledge on the basis of ample literature review.

关键词： dilute magnetic semiconductors(DMS) bound magnetic polaron photoluminescence ferromagnetism