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Search Results: 1 - 10 of 509 matches for " Srinivasa Buddhudu "
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Structural and Optical Properties of Li+: PVP & Ag+: PVP Polymer Films  [PDF]
Kothapalle Sivaiah, Koramala Naveen Kumar, V. Naresh, Srinivasa Buddhudu
Materials Sciences and Applications (MSA) , 2011, DOI: 10.4236/msa.2011.211225
Abstract: PVP polymers containing Li+ or Ag+ Ions have been synthesized in good stability and transparency by using the solution casting method. Their structural, optical, thermal and electrical properties have been investigated from the measurement of XRD, FTIR, SEM, EDAX, optical absorption spectra, TG-DTA profiles and impedance spectral features in order to evaluate their potentialities for their use in electrochemical display device applications.
Photoluminescence and Energy Transfer Process in Bi3+/Sm3+ Co-Doped Phosphate Zinc Lithium Glasses  [PDF]
Chandragiri Parthasaradhi Reddy, Varnakavi Naresh, Ballipalli Chandra Babu, Srinivasa Buddhudu
Advances in Materials Physics and Chemistry (AMPC) , 2014, DOI: 10.4236/ampc.2014.49019
Abstract: Present paper reports on luminescence characteristics of individually doped Bi3+: PZL, Sm3+: PZL and co-doped (Bi3+/Sm3+): PZL (50P2O5-30ZnO-20LiF) glasses prepared by a melt quenching method. The results revealed that Bi3+: PZL glass exhibited a broad emission peak at 440 nm (3P11S0) under excitation wavelength 300 nm (1S03P1). Sm3+: PZL doped glass has shown a prominent orange emission at 601 nm (4G5/26H7/2) with an excitation wavelength 403 nm (6H5/24F7/2). Later on Bi3+ is added to Sm3+: PZL glass by increasing its concentrations from 0.1 - 1.5 mol%. By co-doping Bi3+ to Sm3+: PZL glass, Sm3+ emission intensity has been considerably enhanced till 1.0 mol% due to energy transfer from Bi3+ to Sm3+ and when its concentration exceeds this critical value (1.0 mol%) there has been a drastic decrease in Sm3+ emission which is explained accordingly from photoluminescence spectra, energy level diagram and lifetime measurements.
Headache In Children
Srinivasa R
Annals of Indian Academy of Neurology , 2002,
Abstract: Headaches are common in children. The presentation of headache in children is varied and hence the characterization of headache is more challenging. This situation is worsened further by inadequacies in the history and the effect of maturational factors. Relevant epidemiological and limitations in the applicability of International Headache Society criteria in childhood headache and the rationale for newer criteria are discussed. Migraine and tension-type headache are the common primary headache seen in children. Although there is a paucity of clinical trials the management of childhood migraine, the important role of correct pharmacological approach has been delineated. The pivotal role of non-pharmacological treatment is emphasized.
Self-Oscillating Structural Polymer Gels  [PDF]
Srinivasa R. Pullela, Qingsheng Wang, Zhengdong Cheng
Advances in Nanoparticles (ANP) , 2013, DOI: 10.4236/anp.2013.22016
Abstract: self-oscillating polymer gel has become a distinguished class of smart soft materials. Here we fabricated and demonstrated a self-oscillating structural gel network with the incorporation of the Belousov-Zhabotinsky (BZ) reaction. The structural polymer gel oscillates at a macroscopic level with remarkably faster kinetics compared to a normal gel of similar chemical compositions. The structural polymer gel also displays larger oscillating amplitude compared to the normal gel because of the increased diffusion of fluids surrounding the gel particles. This type of structural polymer gels can be harnessed to provide novel and feasible applications in a wide variety of fields, such as drug delivery, nanopatterning, chemical and biosensing, and photonic crystals.

Ultra-Low Power Designing for CMOS Sequential Circuits  [PDF]
Patikineti Sreenivasulu, Srinivasa Rao, Vinaya Babu
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2015, DOI: 10.4236/ijcns.2015.85016
Abstract: Power consumption is the bottleneck of system performance. Power reduction has become an important issue in digital circuit design, especially for high performance portable devices (such as cell phones, PDAs, etc.). Many power reduction techniques have also been proposed from the system level down to the circuit level. High-speed computation has thus become the expected norm from the average user, instead of being the province of the few with access to a powerful mainframe. Power must be added to the portable unit, even when power is available in non-portable applications, the issue of low-power design is becoming critical. Thus, it is evident that methodologies for the design of high-throughput, low-power digital systems are needed. Techniques for low-power operation are shown in this paper, which use the lowest possible supply voltage coupled with architectural, logic style, circuit, and technology optimizations. The threshold vol-tages of the MTCMOS devices for both low and high Vth are constructed as the low threshold Vth is approximately 150 - 200 mv whereas the high threshold Vth is managed by varying the thickness of the oxide Tox. Hence we are using different threshold voltages with minimum voltages and hence considered this project as ultra-low power designing.
Fast and Accurate Identification of M. tuberculosis Complex Using an Immunochromatographic MPT64 Antigen Detection Test  [PDF]
Anto Jesuraj Uday Kumar, Hiresave Srinivasa
Journal of Tuberculosis Research (JTR) , 2015, DOI: 10.4236/jtr.2015.34021
Abstract: Background: A new rapid Immunochromatographic test (ICT) kit (MPT64 TB Ag Kit) for detection of MPT64 Antigen in M. tuberculosis (MTB) isolates used for rapid identification of MTB isolates developed by SD (Standard Diagnostics) Bio line, South Korea was evaluated. The ICT is a rapid, reliable and cheaper method that can be used instead of conventional biochemical tests for confirming MTB in culture isolates in resource limited laboratories. The study also evaluated the ability of ICT to detect MPT64-Antigen before the micro MGIT could signal positive. Material/Methods: A total of 450 sputum samples of individual patients were used for the study. 152 isolates of Mycobacteria were recovered from solid and liquid media. These strains were tested for the detection of MPT64-antigen. H37Rv strain was served as the positive reference control and also used for early detection of Antigen experiment. Findings: The development of bands on both test and sample region when H37Rv strain was tested were seen (MPT64 antigen positive). When 138 MTB isolates were tested, it showed a similar banding pattern indicating 100% sensitivity. MPT64 band formation was not detected in any of the 14 isolates indicating 100% specificity. Both PPV & NPV were 100%. All the isolates negative for MPT64 Ag were confirmed as MOTT by conventional bio-chemical PNBA. The H37Rv strain showed a faint band from the 2nd day onwards from inoculation till 3rd day in the earlier Antigen detection experiment. Conclusion: Rapid identification of MTB culture isolate is a pressing need for diagnosis and proceeding to perform drug susceptibility testing. MPT64 TB Ag detection ICT kit is a rapid, reliable method, good substitute for molecular identification methods, and conventional biochemical test which is time-consuming and technically demanding. The early detection of Antigen can be used as an effective tool in diagnosis.
Anti-inflammatory activity of theophylline on carrageenan-induced paw edema in male wistar rats
K Srinivasa,BVS Chandrasekhar,J Srinivasa
International Journal of Basic & Clinical Pharmacology , 2013, DOI: 10.5455/2319-2003.ijbcp20130612
Abstract: Background: Evaluate the anti-inflammatory property of theophylline on rat hind paw edema using carrageenan-induced acute inflammatory model. Methods: Wistar male rats (150-200 gm) were divided into 7 groups- 3 standard groups, 3 test groups and 1 control group. Each group consists of six rats. A control group was treated with 0.2ml of normal saline, 3 standard groups were treated with different doses of Diclofenac (Standard drug): 5 mg/kg, 10 mg/kg, 15 mg/kg body weight, respectively and 3 test groups were treated with different doses of Theophylline (Test drug): 5 mg/kg , 10 mg/kg and 15 mg/kg, respectively. The anti-inflammatory property was assessed by plethysmograph. Results: Theophylline demonstrated a significant anti-inflammatory property at different dose levels when compared to controls (p > 0.05). However this anti-inflammatory activity was less as compared to standard drug. Conclusions: Theophylline exhibited a dose dependent anti-inflammatory activity in a carrageenan model of inflammation. [Int J Basic Clin Pharmacol 2013; 2(3.000): 298-301]
Vibrational Spectra of Distorted Structure Molecules by Using Lie Algebraic Techniques: an Application to Copper and Magnesium Octaethyl Porphyrin

Srinivasa Rao Karumuri,

中国物理快报 , 2010,
Abstract:
Modified Direct Torque Control of Three-Phase Induction Motor Drives with Low Ripple in Flux and Torque
Vinay KUMAR,Srinivasa RAO
Leonardo Journal of Sciences , 2011,
Abstract: This paper proposes an algorithm for direct flux and torque controlled three phase induction motor drive systems. This method is based on control of slip speed and decoupled between amplitude and angle of reference stator flux for determining required stator voltage vector. In this proposes model, integrator unit is not required to generate the reference stator flux angle for calculating required stator voltage vector, hence it eliminates the initial values problems in real time. Within the given sampling time, flux as well as torque errors are controlled by stator voltage vector which is evaluated from reference stator flux. The direct torque control is achieved by reference stator flux angle which is generates from instantaneous slip speed angular frequency and stator flux angular frequency. The amplitude of the reference stator flux is kept constant at rated value. This technique gives better performance in three-phase induction motor than conventional technique. Simulation results for 3hp induction motor drive, for both proposed and conventional techniques, are presented and compared. From the results it is found that the stator current, flux linkage and torque ripples are decreased with proposed technique.
ESTIMATION OF RELIABILITY IN MULTICOMPONENT STRESS-STRENGTH BASED ON GENERALIZED EXPONENTIAL DISTRIBUTION ESTIMACIóN DE CONFIABILIDAD EN LA RESISTENCIA AL ESTRéS DE MULTICOMPONENTES BASADO EN LA DISTRIBUCIóN EXPONENCIAL GENERALIZADA
Rao Gadde Srinivasa
Revista Colombiana de Estadística , 2012,
Abstract: A multicomponent system of k components having strengths following k-independently and identically distributed random variables X_{1}, X_{2},..., X_{k} and each component experiencing a random stress Y is considered. The system is regarded as alive only if at least s out of k (s < k) strengths exceed the stress. The reliability of such a system is obtained when strength and stress variates are given by generalized exponential distribution with different shape parameters. The reliability is estimated using ML method of estimation in samples drawn from strength and stress distributions. The reliability estimators are compared asymptotically. The small sample comparison of the reliability estimates is made through Monte Carlo simulation. Using real data sets we illustrate the procedure. Se considera un sistema de k multicomponentes que tiene resistencias que se distribuyen como k variables aleatorias independientes e idénticamente distribuidas X_{1}, X_{2},..., X_{k} y cada componente experimenta un estrés aleatorio Y . El sistema se considera como vivo si y solo si por lo menos s de k(s < k) resistencias exceden el estrés. La confiabilidad de este sistema se obtiene cuando las resistencias y el estrés se distribuyen como una distribución exponencial generalizada con diferentes parámetros de forma. La confiabilidad es estimada usando el método ML de estimación en muestras extraídas tanto para distribuciones de resistencia como de estrés. Los estimadores de confiabilidad son comparados asintóticamente. La comparación para muestras peque as de los estimadores de confiabilidad se hace a través de simulaciones Monte Carlo. El procedimiento también se ilustra mediante una aplicación con datos reales.
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