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Search Results: 1 - 10 of 157239 matches for " Singh B "
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ASTER DEM Based Studies for Geological Investigation around Singhbhum Shear Zone (SSZ) in Jharkhand, India  [PDF]
Journal of Geographic Information System (JGIS) , 2010, DOI: 10.4236/jgis.2010.21003
Abstract: Singhbhum Shear Zone (SSZ) is a geologically rich belt with structures like faults and folds being the distinctive features. Due to these characteristics this area has been an important centre of studies since past few decades. With the advent of Remote Sensing and GIS, it has been possible to study and interprete geological setting of any area in the laboratory itself without even visiting the field again and again. The present study aims to investigate the geology of the SSZ from ASTER DEM by observing the elevation, as-pect, texture, pattern etc of shaded relief images. This can prove to be an excellent supplementary information database for interpretations along with other data.
A Critical Review of Machine Loading Problem in Flexible Manufacturing System  [PDF]
Ranbir Singh, Rajender Singh, B. K. Khan
World Journal of Engineering and Technology (WJET) , 2015, DOI: 10.4236/wjet.2015.34028
Abstract: Production planning is the foremost task for manufacturing firms to deal with, especially adopting Flexible Manufacturing System (FMS) as the manufacturing strategy for production seeking an optimal balance between productivity-flexibility requirements. Production planning in FMS provides a solution to problems regarding part type selection: machine grouping, production ratio, resource allocation and loading problem. These problems need to be solved optimally for maximum utilization of resources. Optimal solution to these problems has been a focus of attention in production and manufacturing, industrial and academic research since a number of decades. Evolution of new optimization techniques, software, technology, machines and computer languages provides the scope of a better optimal solution to the existing problems. Thus there remains a need of research to solve the problem with latest tools and techniques for higher optimal use of available resources. As an objective, the researchers need to reduce the computational time and cost, complexity of the problem, solution approach viz. general or customized, better user friendly communication with machine, higher freedom to select the desired objective(s) type(s) for optimal solution to the problem. As an approach to the solution to the problem, a researcher first needs to go for an exhaustive literature review, where the researcher needs to find the research gaps, compare and analyze the tools and techniques used, number of objectives considered for optimization and need, and scope of research for the research problem. The present study is a review paper analyzing the research gaps, approach and techniques used, scope of new optimization techniques or any other research, objectives considered and validation approaches for loading problems of production planning in FMS.
Nonlinear Optical Properties of Two Different Nanoassemblies of Polydiacetylene (PDA): PDA Nanovesicles and PDA Nanocrystals  [PDF]
B. Bhushan, T. Kundu, B. P. Singh
Optics and Photonics Journal (OPJ) , 2013, DOI: 10.4236/opj.2013.34042

We have synthesized and characterized two different nanoassemblies of polydiacetylene (PDA), PDA nanovesicles and PDA nanocrystals, in order to study the influence of chain packing geometry of the two nanoassemblies on their third order nonlinear optical properties. The second molecular hyperpolarizability γ(-ω,ω,-ω,ω)of the two samples was investigated by antiresonant ring interferometric nonlinear spectroscopic (ARINS) technique using femtosecond modelocked Ti:sapphire laser in the spectral range of 720 nm - 820 nm. The observed spectral dispersion of γ has been explained in the framework of three-essential states model involving the ground state, a one-photon excited state and a two-photon excited state. The observed optical nonlinearity has been correlated with the electronic structure of the two samples. The energy of two-photon state, transition dipole moments and line width of the transitions have been estimated. Our studies show that the arrangement of polymer chains in polydiacetylene nanocrystals is more favorable for higher nonlinearity.

Bilateral cataract produced by electricity - A case report
Singh B
Indian Journal of Ophthalmology , 1962,
Some unusual discrete VLF emissions observed at a low-latitude ground station at Agra
B. Singh
Annales Geophysicae (ANGEO) , 2003,
Abstract: A detailed analysis of the VLF emissions data obtained during occasional whistler campaigns at the low-latitude ground station Agra (geomagnetic latitude 17°1' N, L = 1.15) has yielded some unusual discrete VLF emissions of the rising type. These include (1) emissions occurring at time intervals increasing in ge ommetrical progression, (2) emissions occuring simulta neously in different frequency ranges and (3) emissions observed during daytime. In the present study, the observed characteristics of these emissions are described and interpreted. It is shown that the increasing time delay between different components of the emissions match closely with the propagation time delays between different hops of a whistler of dispersion 19 s1/2, the unusual occurrence of the emissions in two different frequency ranges approximately at the same time may possibly be linked with their generation at two different locations, and the occurrence of emissions during daytime may be due to propagation under the influence of equatorial anomaly.
Theory of Electron Density of States of High Temperature Impurity Induced Anharmonic Superconductors  [PDF]
Hempal Singh, Anu Singh, Vinod Ashokan, B. D. Indu
Advances in Materials Physics and Chemistry (AMPC) , 2012, DOI: 10.4236/ampc.2012.24037

The expression for the electron density of states (EDOS) of high temperature superconductors (HTS) has been derived taking the disorder and anharmonicity effects as a central problem. This has been dealt with the help of double time thermodynamic Green’s function theory for electrons via a generalized Hamiltonian which consists of the contribution due to 1) unperturbed electrons; 2) unperturbed phonons; 3) isotopic impurities; 4) anharmonicities (no BCS type Hamiltonian has been taken up in the formulation); and 5) electron-phonon interactions. The renormalization effects and emergence of pairons appears as a unique feature of the theory and dependence of EDOS on impurity concentration and temperature has been discussed in details with special reference to the HTS.

Arsenic(III) Remediation from Contaminated Water by Oxidation and Fe/Al Co-Precipitation  [PDF]
Wensheng Zhang, Pritam Singh, Touma B. Issa
Journal of Water Resource and Protection (JWARP) , 2011, DOI: 10.4236/jwarp.2011.39075
Abstract: Battery grade γ-MnO2 powder was investigated as an oxidant and an adsorbent in combination with Fe/Al coagulants for removal of arsenic from contaminated water. Simultaneous oxidation of As(III) and removal by coprecipitation/adsorption (one step process) was compared with pre-oxidation and subsequent removal by coprecipitation/adsorption (two step process). The rate of As(III) oxidation with MnO2 is completed in two stages: rapid initially followed by a first order reaction. As(III) is oxidised to As(V) by the MnO2 with a release of approximately 1:1 molar Mn(II) into the solution. No significant pH effect on oxidation of As(III) was observed in the pH range 4 - 6. The rate showed a decreasing trend above pH 6. The removal of As(V) by adsorption on the MnO2 decreased significantly with increasing pH from 4 to 8. The adsorption capacity of the γ-MnO2 with particle size 90% passing 10 µm was determined to be 1.5 mg/g at pH 7. MnO2 was found to be more effective as an oxidant for As(III) in the two step process than in the one step process.
Role of Entanglement in Quantum Neural Networks (QNN)  [PDF]
Manu P. Singh, B. S. Rajput
Journal of Modern Physics (JMP) , 2015, DOI: 10.4236/jmp.2015.613196
Abstract: Starting with the theoretical basis of quantum computing, entanglement has been explored as one of the key resources required for quantum computation, the functional dependence of the entanglement measures on spin correlation functions has been established and the role of entanglement in implementation of QNN has been emphasized. Necessary and sufficient conditions for the general two-qubit state to be maximally entangled state (MES) have been obtained and a new set of MES constituting a very powerful and reliable eigen basis (different from magic bases) of two-qubit systems has been constructed. In terms of the MES constituting this basis, Bell’s States have been generated and all the qubits of two-qubit system have been obtained. Carrying out the correct computation of XOR function in neural network, it has been shown that QNN requires the proper correlation between the input and output qubits and the presence of appropriate entanglement in the system guarantees this correlation.
An Integral Treatment for Heat and Mass Transfer along a Vertical Wall by Natural Convection in a Porous Media
B. B. Singh
Sel?uk Journal of Applied Mathematics , 2006,
Abstract: This paper deals with the free convective heat and mass transfer along a vertical wall embedded in a fluid saturated porous medium by using integral method . The governing parameters for the problem are the buoyancy ratio N and Lewis Number Le. The results for the local Nusselt and Sherwood numbers are presented for wide range of parameters. The thermal and concentration boundary layer thicknesses have also been calculated for the flow field. It has been observed that the results obtained by integral method are in good agreement with those obtained by Bejan and Khair.
HIV Associated Arthritis
Singh AJ,Singh LN,Singh B,Singh YN
Indian Journal of Physical Medicine and Rehabilitation , 2009,
Abstract: Objectives: To find out pattern of joints involved andeffectiveness of a treatment program in HIV associatedarthritisMethods: A cohort of 26 Human ImmunodeficiencyVirus (HIV) associated arthritis patients (21 males and 5females) who attended Department of Physical Medicineand Rehabilitation of the Regional Institute of MedicalSciences, Imphal was studied during 2002 and 2005. CD4count and joint fluid examination including culture andsensitivity were performed before initiation of thetreatment. A management program consisting ofNSAIDs, intra-articular (I/A) methyl prednisoloneinjection upto a maximum of 3 times, range of mobilizationexercises, strengthening of muscles around the joint, localrestriction of activities to protect joints was instituted.Low dose oral corticosteroids was considered when therewas persistence of joint effusion after I/A methylprednisolone injection(s). Joint score, pain score andactivities of daily living score were assessed at baseline,3 and 6 months.Results: Mean age of the patients was 33.2 (SD, 6.6)years. Knee joint was involved in 22 cases followed byankle joint in 5 cases. More than two joints were involvedin 7 cases. Median CD4 count was 484 (range 231-897).The synovial fluid showed features of inflammation andwas sterile. Nineteen cases (73%) remained symptomfree for at least 3 months after I/A injection ofmethylprednisolone. Of the 7 refractory cases, all in kneejoints, two had associated hyperuricemia. Synovial biopsyshowed tuberculosis in one and the case responded tothe addition of antitubercular drugs. And other caseresponded to hypouricaemic drug. Four cases respondedto low dose oral corticosteroids and another caseresponded only after initiation of antiretroviral treatment.Conclusions: Knee was the most commonly involvedjoint. Intraarticular methylprednisolone seem to beeffective in the management of these cases in addition tothe rehabilitation program. Low dose oral prednisolne wasfound to be a good adjunct in refractory cases.
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