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Search Results: 1 - 10 of 15599 matches for " Singh AK "
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Effect of point source and heterogeneity on the propagation of magnetoelastic shear wave in a monoclinic medium
A Chattopadhyay, AK Singh
International Journal of Engineering, Science and Technology , 2011,
Abstract: This paper stands to investigate the possibility of propagation of SH waves due to a point source in a magnetoelastic monoclinic layer lying over a heterogeneous monoclinic half-space. The heterogeneity is caused by consideration of quadratic variation in rigidity. The methodology employed combines an efficient derivation for Green’s functions based on algebraic transformations with the perturbation approach. Dispersion equation has been obtained in the closed form. The dispersion curves are compared for different values of magnetoelastic coupling parameters and inhomogeneity parameters. It is found that as heterogeneity parameters and magnetoelastic coupling parameters increases, the phase velocity increases for both isotropic and monoclinic cases but the increase is more prominent in the monoclinic case. In the isotropic case, when heterogeneity and magnetic field are absent, the dispersion equation is matched with the classical SH wave equation.
Stem Cells in PMR Practices
Singh AK,Roy LS
Indian Journal of Physical Medicine and Rehabilitation , 2008,
Abstract: Stem cells are one of the most fascinating areas of biology today. But like many expanding fields of scientificinquiry, research on stem cells raises scientific questions as rapidly as it generates new discoveries. Stemcell therapy presents the potential promise to heal the defective systems in the body and the field is witnessingsome path breaking research currently. The technology is provocative and promising, but the future is farfrom certain. Nevertheless, the science that is unfolding about neural and muscular development, autoimmunediseases especially Rheumatoid Arthritis is exciting in its potential implications. This article contains currentinformation derived from internet searches on their use in some common conditions in Physical Medicineand Rehabilitation practices.
Profile of Reconstructive Surgery Cases in Leprosy in Central UP - India: Experience of PPP Model
Kumar V,Agarwal AK,Singh AK
Indian Journal of Physical Medicine and Rehabilitation , 2010,
Abstract: 109 cases of leprosy were identified in the camps usingprivate public partnership (PPP) between nongovernmentaland governmental organizations. Thepatients were admitted and operated free in theDepartment of Physical Medicine and Rehabilitation andPlastic Surgery, Chhatrapati Shahuji Maharaj MedicalUniversity, Lucknow during 2007-08. 75.2% were malesand 24.8% females. Maximum cases (81.7%) werebetween 11 to 40 years. Overall illiteracy was 68.8%.89.9% were having hand lesions with equal distributionin either hands in 32 cases each. Clawing of both handswas observed in 28 cases. Foot lesions were seen in 18cases out of which nine cases each were of foot dropand plantar ulcer. In 84 cases (77.1%) Dermolipectomywith or without Zancolli procedure was performed. TibialisPosterior transfer was done in nine cases of foot drop.The nine cases of plantar ulcer were treated by properlocal dressing followed by below knee Plaster of Pariscast with walking iron (weight relieving) followed by PTBcalliper with MCR padded open shoes. PPP helpedidentify more patients and get help to avail free treatmentincluding surgery done at the government hospitalincluding travel and food expenses paid by the nongovernmentalorganization.
Planning of different types of distributed generation with seasonal mixed load models
RP Payasi, AK Singh, D Singh
International Journal of Engineering, Science and Technology , 2012,
Abstract: The comparison of different types of distributed generation (DG) may help for appropriate selection of type of DG for distributed generation planning (DGP) in distribution system for various load scenario. The load on each bus of distribution system may be, in practice, the composition of industrial, residential, and commercial types of load which may also vary with seasonal day, and night. Therefore, in this paper the seasonal mixed load models at each bus are assumed and study is carried out with bus voltage and line power capacity limits for different types of DG using incremental power flow and exhaustive search method as deterministic approach. This analysis shows that mixed load model, types of DG, and power factor of DG have significant impact on size and location of DG.
Review of distributed generation planning: objectives, constraints, and algorithms
RP Payasi, AK Singh, D Singh
International Journal of Engineering, Science and Technology , 2011,
Abstract: The Distributed Generation (DG) technologies, which include both conventional and non-conventional type of energy sources for generating power, are gaining momentum and play major role in distribution system as an alternative distribution system planning option. The penetration of DGs is potentially beneficial if distributed generation planning (DGP) is optimal i.e. their site and size are selected optimally by optimization of single or multi-objective function under certain operating constraints. Many researchers have presented some rigorous optimization-based methods for DGP. This paper will review the various objectives, different constraints as well as optimization based models using conventional algorithms, intelligent searches and fuzzy set applications in DGP.
Health Status of Adolescent Girls in Slums of Lucknow
Singh J,Singh JV,Srivastava AK
Indian Journal of Community Medicine , 2006,
Sources of resistance against foliar blight of wheat caused by Helminthosporium sativum
Indian Phytopathology , 2012,
System Performance Ratings of High Speed Nano Devices Using Fuzzy Logic
Ak. Ashakumar Singh,Y. Surjit Singh,K. Surchandra Singh
International Journal of Computer Science Issues , 2011,
Abstract: A single dimension cannot quantify or properly express the performance of high speed Nano devices. It is very difficult to interpret high speed Nano devices parameters without knowing what application (users) are involved. The system performance parameters of (In, Ga)As are Ac mobility, Lattice Temperature, Electron Temperature, Carrier Concentration, and Channel Length. These system parameters need to be frequently updated based on feedbacks from implementation of previous parameters. These feedbacks are always stated in the form of ordinal ratings, e.g. high speed, average performance, good condition. The Different people can describe different values to these ordinal ratings without a clear-cut reason or scientific basis. There is need for a way or means to transform vague ordinal ratings to more appreciable and precise numerical estimates. The paper transforms the ordinal performance ratings of some system performance parameters to numerical ratings using Fuzzy Logic.
Biology and interactions of two distinct monopartite begomoviruses and betasatellites associated with radish leaf curl disease in India
AK Singh, B Chattopadhyay, S Chakraborty
Virology Journal , 2012, DOI: 10.1186/1743-422x-9-43
Abstract: We demonstrate that RaLCD is caused by a complex of two Old World begomoviruses and their associated betasatellites. Radish leaf curl virus-Varanasi is identified as a new recombinant species, Radish leaf curl virus (RaLCV) sharing maximum nucleotide identity of 87.7% with Tomato leaf curl Bangladesh virus-[Bangladesh:2] (Accession number AF188481) while the virus causing radish leaf curl disease-Pataudi is an isolate of Croton yellow vein mosaic virus-[India] (CYVMV-IN) (Accession number AJ507777) sharing 95.8% nucleotide identity. Further, RDP analysis revealed that the RaLCV has a hybrid genome, a putative recombinant between Euphorbia leaf curl virus and Papaya leaf curl virus. Cloned DNA of either RaLCV or CYVMV induced mild leaf curl symptoms in radish plants. However, when these clones (RaLCV or CYVMV) were individually co-inoculated with their associated cloned DNA betasatellite, symptom severity and viral DNA levels were increased in radish plants and induced typical RaLCD symptoms. To further extend these studies, we carried out an investigation of the interaction of these radish-infecting begomoviruses and their associated satellite, with two tomato infecting begomoviruses (Tomato leaf curl Gujarat virus and Tomato leaf curl New Delhi virus). Both of the tomato-infecting begomoviruses showed a contrasting and differential interaction with DNA satellites, not only in the capacity to interact with these molecules but also in the modulation of symptom phenotypes by the satellites.This is the first report and experimental demonstration of Koch's postulate for begomoviruses associated with radish leaf curl disease. Further observations also provide direct evidence of lateral movement of weed infecting begomovirus in the cultivated crops and the present study also suggests that the exchange of betasatellites with other begomoviruses would create a new disease complex posing a serious threat to crop production.Geminiviruses (family Geminiviridae) have circular s
Recent techniques used in transmission line protection: A review
KV Babu, M Tripathy, AK Singh
International Journal of Engineering, Science and Technology , 2011,
Abstract: This article presents a survey of the developments in digital relays for protection of transmission lines. For a modern power system, selective high speed clearance of faults on high voltage transmission lines is critical and this survey indicates the efficient and promising implementations for fault detection, classification and fault location in power transmission line protection. The work done in this area favor computerized relays, digital communication technologies and other technical developments, to avoid cascading failures and facilitate safer, secure and reliable power systems. Efforts have been made to include almost all the techniques and philosophies of transmission line protection reported in the literature up to October 2010. The focus of this article is on the most recent techniques, like artificial neural network, fuzzy logic, fuzzy-neuro, fuzzy logicwavelet based and phasor measurement unit-based concepts as well as other conventional methods used in transmission line protection.
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