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Search Results: 1 - 10 of 149636 matches for " Somashekar H "
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Micro-Structure, Ac Conductivity and Spectroscopic Studies of Cupric Sulphate Doped PVA/PVP Polymer Composites  [PDF]
K. Hemalatha, H. Somashekarappa, R. Somashekar
Advances in Materials Physics and Chemistry (AMPC) , 2015, DOI: 10.4236/ampc.2015.510041
Abstract: A series of polyvinyl alcohol/polyvinyl pyrrolidone polymer composite films doped with different amount of cupric sulphate (CuSO4) were prepared by means of solution casting technique. These films were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Ultraviolet-Visible absorbance spectroscopy (UV-Vis) and Ac conductivity measurement studies. XRD patterns of these films recorded at room temperature show the increase in amorphousity of the matrix with the increase in the concentration of CuSO4 in polymer composites. Microstructural parameters were computed using an in-house program employing XRD data. Recorded FT-IR spectra give information about the stretching and bending of the characteristic absorption bands in these films. The variation in the transmittance has been studied with the help of recorded UV-Vis spectra and hence the optical band gap present in the samples is also calculated. The measured Ac conductivity shows how the conductivity varies in these films with the presence of different amount of CuSO4 in these films.
1-D Paracrystalline Model to Simulate a Bragg Reflection: Computation of Crystallite Size and Lattice Strain  [PDF]
M. B. Nanda Prakash, G. Thejas Urs, H. T. Ananda, R. Somashekar
Crystal Structure Theory and Applications (CSTA) , 2014, DOI: 10.4236/csta.2014.32006

A simple and elegant method to simulate single order reflection profile based on 1-D paracrystalline model has been proposed here. For variety of polymer films this approach has been applied to compute microcrystalline parameters like crystallite size and lattice strain. Other metallic oxide compounds are also analysed using this approach. Employing this model, X-ray diffraction patterns from various polymer samples have been analysed and corresponding microstructure parameters have been reported in this article.

Paraneoplastic papilloedema in a child with neuroblastoma
Scott Julius,Moses Prabhakar,Somashekar H,Sathish Kumar T
Indian Journal of Cancer , 2005,
Abstract: Non-metastatic neurological disease complicating neuroblastoma is well recognized. Gross papilloedema in the absence of intracranial disease as initial manifestation of neuroblastoma is reported in adults. We report for the first time a case of bilateral papilloedema in a child with neuroblastoma in the absence of intracranial disease and hypertension.
Trends in prescribing antimicrobials in an ENT outpatient department of a tertiary care hospital for upper respiratory tract infections
K.Ramachandra,NarendranathSanji,H.S. Somashekar,Abhishek Acharya
International Journal of Pharmacology and Clinical Sciences , 2012,
Abstract: Background: The drug utilization study identifies the problems that arise from drug usage in healthcare delivery system and highlights the current approaches to the rational use of drugs.Objective: To study the trends in prescribing antimicrobials in an ENT outpatient department (OPD) of a tertiary care hospital for upper respiratory tract infections (URTI). Materials and method: An observational study was conducted in the OPD of ENT at Bapuji Hospital, Davangere, Karnataka, India from May to July 2011. Prescriptions of all patients were collected; relevant information entered in a preformed proforma and analyzed using the drug utilization 90% [(DU-90%)] method. The results were presented in percentages and analyzed using DU-90% method.Result: A total of 300 prescriptions were analyzed. The common cases for which antimicrobials prescribed were infections like pharyngitis, acute suppurative otitis media (ASOM), chronic suppurative otitis media (CSOM), tonsillitis, laryngitis. It was noted that 142 patients (47.33%) received amoxicillin alone, 52 patients (17.33%) received combination of amoxicillin and clavulanic acid, 43 patients (14.33%) received cefixime, 40 patients (13.33%) received cefuroxime and 23 patients (7.66%) received azithromycin, levofloxacin and other antimicrobials. Conclusion: The present study showed that among the various antimicrobials used, only four antimicrobials figured in DU-90% segment which were amoxicillin, combination of amoxicillin and clavulanic acid and cephalosporins like cefixime and cefuroxime.Though azithromycin and levofloxacin are also frequently used drugs in upper respiratory tract infections, in this study they did not figure in the DU-90% segment.
Preparation and Characterization of HPMC/PVP Blend Films Plasticized with Sorbitol
H. Somashekarappa,Y. Prakash,K. Hemalatha,T. Demappa,R. Somashekar
Indian Journal of Materials Science , 2013, DOI: 10.1155/2013/307514
Abstract: The aim of this present work is to investigate the effect of plasticizers like Sorbitol on microstructural and mechanical properties of hydroxypropyl methylcellulose (HPMC) and Polyvinylpyrrolidone (PVP) blend films. The pure blend and plasticized blend films were prepared by solution casting method and investigated using wide angle X-ray scattering (WAXS) method. WAXS analysis confirms that the plasticizers can enter into macromolecular blend structure and destroy the crystallinity of the films. FTIR spectra show that there are a shift and decrease in the intensity of the peaks confirming the interaction of plasticizer with the blend. Mechanical properties like tensile strength and Young’s Modulus decrease up to 0.6% of Sorbitol content in the films. Percentage of elongation at break increases suggesting that the plasticized films are more flexible than pure blend films. These films are suitable to be used as environmental friendly and biodegradable packaging films. 1. Introduction Polymer blending is one of the most useful ways to have new materials with required properties and there have been great scientific and commercial progress in the area of polymer blends. This was driven by the realization that new molecules are not always required to meet the need for new materials and blending can usually be implemented more rapidly and economically than the development of new materials [1, 2]. Blends of synthetic and natural polymers represent a new class of materials and have attracted much attention especially in bioapplications. The success of synthetic polymers as biomaterial relies mainly on their wide range of mechanical properties, transformation processes that allow a variety of different shapes to be easily obtained at low production costs. Biological polymers represent good biocompatibility, but their mechanical properties are often poor; the necessity of preserving biological properties complicates their processability and their production costs are very high [3, 4]. Packaging plays an important role in marketing food and food related articles (processed food, bakery products, beverages, food grains, vegetables, and fruits). Food quality and safety are major concerns in the food industry. Packaging can be considered as an emerging trend that could have an impact on shelf-life extension and food safety. In general a packaging material has to fulfil certain requirements. Packaging makes distribution easier and protect the article from environmental conditions like sun light, dust, oxygen, moisture, microbes, mechanical stress, and so on. A
A Computational Investigation of Unsteady Aerodynamics of Insect-Inspired Fixed Wing Micro Aerial Vehicle’s 2D Airfoil
Somashekar V
Advances in Aerospace Engineering , 2014, DOI: 10.1155/2014/504049
Abstract: A Micro air vehicle (MAV) is defined as class of unmanned air vehicle (UAV) having a linear dimension of less than 15 centimeters and a mass of less than 100 grams with flight speeds of 6 to 12 meters per second. MAVs fall within a Reynolds number (Re) range of 50,000 and 120,000, in which many causes of unsteady aerodynamic effects are not fully understood. The research field of low Reynolds number aerodynamics is currently an active one, with many defence organizations, universities, and corporations working towards a better understanding of the physical processes of this aerodynamic regime. In the present work, it is proposed to study the unsteady aerodynamic analysis of 2D airfoil using CFD software and Xfoil panel code method. The various steps involved in this work are geometric modelling using CATIA V5R17, meshing using ICEM CFD, and solution and postprocessing through FLUENT. The finite control volume analysis and Xfoil panel code method has been carried out to predict aerodynamic characteristics such as lift coefficients, drag coefficients, moment coefficients, pressure coefficients, and flow visualization. The lift and drag coefficients were compared for all the simulations with experimental results. It was observed that for the 2D airfoil, lift and drag both compared well for the midrange angle of attack from ?10 to 15 degree AOA. 1. Introduction Micro air vehicles (MAVs) have attracted significant attention since mid-1990 for both civilian and military applications. Micro air vehicle (MAV) is defined here as a small, portable flying vehicle which is designed for performing useful work. The desire for portable, low altitude aerial surveillance has driven the development of aircraft on the scale of small birds. Vehicles in this class of small-scale aircraft are known as micro air vehicles or MAVs and have great potential for applications in surveillance and monitoring tasks in areas either too remote or too dangerous to send human agents. Equipped with small video cameras and transmitters, MAVs can image targets that would otherwise remain inaccessible. MAVs are also capable of carrying an array of sensors to obtain additional information including, for example, airborne chemical or radiation levels. MAVs are by definition small aircrafts which fly at relatively low speeds. Such flight characteristics will result in flow regimes with Reynolds numbers. Another aerodynamic signature of MAV is wings with small aspect ratio; in most cases the chord is roughly equal to the wingspan. This combination of low Reynolds number flight and low aspect
Preparation and Characterization of MMT Doped PVA/SA Polymer Composites  [PDF]
Kapanigowda Hemalatha, Hanumanthappa Somashekarappa, Rudrappa Somashekar
Advances in Materials Physics and Chemistry (AMPC) , 2014, DOI: 10.4236/ampc.2014.49020
Abstract: Blends of PVA/SA polymer doped with Montmorillonite were prepared by solution casting technique. Doping of nanoparticles to the polymer matrix does affect the structural and conducting properties. To analyze such changes, these films were subjected to X-ray diffraction, FT-IR spectroscopy, UV-visible absorbance and impedance analysis. Microstructural parameters were computed using in-house program employing X-ray data. Electrical conductivity of these polymer composites was derived using obtained impedance values to understand the conducting property. The results thus obtained are reported in this work.
A Study to Assess the Psychosocial Problems and Quality of Life of Parents with Asthmatic Children in Opd’s of Ramaiah Hospitals, Bengaluru  [PDF]
Somashekar Ankanahalli Ramu, Arpitha Panduranga, S. Akarsh
Open Journal of Pediatrics (OJPed) , 2018, DOI: 10.4236/ojped.2018.81007
Abstract: The study was undertaken to assess the level of psychosocial problems and quality of life of parents with asthmatic children in Ramaiah hospitals, Bengaluru. Statement of the problem: “A study to assess the psychosocial problems and quality of life of parents with asthmatic children in opd’s of Ramaiah hospitals, Bengaluru”. Objectives of the study: 1) To assess the level of psychosocial problems and level of quality of life of parents with asthmatic children. 2) To find the correlation between scores of psychosocial problem and quality of life among parents with asthmatic children. 3) To find the association between level of psychosocial problem and selected socio demographic variables. 4) To find the association between level of quality of life and selected socio-demographic variable. Method: A descriptive survey approach was used for the study. Purposive sampling technique was used to select 50 parents with asthmatic children. Data was collected through interview schedule by using structured rating scale to assess psychosocial problems and quality of life. Data was collected and analyzed using descriptive and Inferential statistics in terms of frequencies, Percentage, Mean, Mean percentage, Standard deviation, Karl Pearson’s correlation co-efficient and chi-square test. Findings: The major findings of the study indicated that majority of the parents with asthmatic children that is 33 (66%) were having moderate psychosocial problems and 16 (32%) were having mild psychosocial problem and 1 (2%) were having severe psychosocial problem and 38 (76%) were having good quality of life, 8 (16%) were having better quality of life and 4 (8%) were having poor quality of life. Karl Pearson’s correlation co-efficient test revealed that there is a correlation that exists between
Golden Research Thoughts , 2013, DOI: 10.9780/22315063
Abstract: The word 'Gazetteer' comes from the Latin term 'Gazeta' which means a small coin or the cost of an early news sheet. In earlier days, it was used in narrow sense. But today this word has a broader meaning. After geographical discoveries various attempts to prepare Gazetteers of various regions. As a result of establishment of imperialism and colonialism, preparation of Gazetteers began. In the same way the British who came to India to establish their Supremacy became interested in the study of the regions of India which came under their rule. Mainly there was self interest in this matter. There was a plan by the British to establish their colonial subjugation and political hegemony over the regions through a study and acquaintance.
International Journal of Engineering Science and Technology , 2011,
Abstract: The main objective of the face detection is to determine whether human faces exist in an image or not. If exists, return the spatial location of the image. Successive mean quantization transform is proposed for illumination and sensor insensitive operation. Sparse network of winnows is presented to speed up the original classifier. Finally SMQT features and SNoW classifier are combined with the chrom for the frontal face detection. Detection results are presented for the images collected using a web camera. This is very robust to theillumination, pose etc variations and suitable for real-time face detection system.
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