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Search Results: 1 - 10 of 144994 matches for " B. Bala Tripura Sundari "
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Design Space Exploration of Deeply Nested Loop 2D Filtering and 6 Level FSBM Algorithm Mapped onto Systolic Array
B. Bala Tripura Sundari
VLSI Design , 2012, DOI: 10.1155/2012/268402
Abstract: The high integration density in today's VLSI chips offers enormous computing power to be utilized by the design of parallel computing hardware. The implementation of computationally intensive algorithms represented by -dimensional (-D) nested loop algorithms, onto parallel array architecture is termed as mapping. The methodologies adopted for mapping these algorithms onto parallel hardware often use heuristic search that requires a lot of computational effort to obtain near optimal solutions. We propose a new mapping procedure wherein a lower dimensional subspace (of the -D problem space) of inner loop is identified, in which lies the computational expression that generates the output or outputs of the -D problem. The processing elements (PE array) are assigned to the identified sub-space and the reuse of the PE array is through the assignment of the PE array to the successive sub-spaces in consecutive clock cycles/periods (CPs) to complete the computational tasks of the -D problem. The above is used to develop our proposed modified heuristic search to arrive at optimal design and the complexity comparisons are given. The MATLAB results of the new search and the design space trade-off analysis using the high-level synthesis tool are presented for two typical computationally intensive nested loop algorithms—the 6D FSBM and the 4D edge detection alternatively known as the 2D filtering algorithm.
Dependence Vectors and Fast Search of Systolic Mapping for Computationally Intensive Image Processing Algorithms
Bala Tripura Sundari B
Lecture Notes in Engineering and Computer Science , 2011,
Mapping Multi-Loop Nest Algorithms on to Reconfigurable Architecture
B. Bala Tripura Sundari
Journal of Artificial Intelligence , 2012,
Abstract: Recently, FPGA (Field Programmable Gate Arrays) technologies have made significant advances in both speed and capacity. Specifically, the design methodology to map the loop dependencies in a do loop algorithm on to a linear array of processors after extraction of parallelism is a challenging task. The mapping of Full Search Block Motion Estimation (FSBM) and edge detection algorithms are taken up here as they represent multi loop nested algorithms that are intensive in computations. Also, a method of prefixing the elements in the mapping vectors has been used which reduces the search space for both the algorithms. The formulation of a dependence vectors for the FSBM is explained and the architecture for the computationally intensive FSBM and Edge detection algorithm is developed and the simulation and synthesis results are presented.
Tanikella Sai Annapurneswari,Sakinala Shilpa,Chodavarapu Bala Tripura Sundari,Vaidya Jayathirtha Rao
International Research Journal of Pharmacy , 2012,
Abstract: The present work describes a reverse phase high performance liquid chromatographic method (RP-HPLC) for the simultaneous estimation of Propranolol HCl (PRH) and Clonazepam (CNZ) in bulk and in pharmaceutical dosage form. Chromatographic separation was performed on Agilent Eclipse xdb C18 (150 mm 4.6 mm i.d., 5 m) column, with a mobile phase comprising of a mixture of methanol, acetonitrile and 20 mM potassium dihydrogen phosphate buffer in the ratio of 27.5:27.5:45 v/v. The pH of buffer was adjusted to 3.0 with orthophosphoric acid. The flow rate was 1.0 ml/min with detection at 266 nm. Retention times of Propranolol HCl and Clonazepam were found to be 2.400 and 4.492 min respectively. As per International Conference on Harmonisation (ICH) guidelines the method was validated for linearity, accuracy, precision, limit of quantitation, limit of detection, and robustness. Linearity of PRH was found to be in the range of 20-120 μg/mL and that for CNZ was found to be 1-6 μg/mL. The correlation coefficients were 0.9994 and 0.9995 for PRH and CNZ respectively. The mean recoveries obtained for PRH and CNZ were 100.6% and 100.1%. This demonstrates that the developed method is simple, precise, accurate, reproducible and rapid for simultaneous estimation of these drugs in bulk and in tablet dosage forms.
Reactive Pulsed Laser Deposition of Titanium Nitride Thin Films: Effect of Reactive Gas Pressure on the Structure, Composition, and Properties
R. Krishnan,C. David,P. K. Ajikumar,R. Nithya,S. Tripura Sundari,S. Dash,B. K. Panigrahi,M. Kamruddin,A. K. Tyagi,Vikram Jayaram,Baldev Raj
Journal of Materials , 2013, DOI: 10.1155/2013/128986
Abstract: Titanium nitride (TiN) thin films were deposited by reactive pulsed laser deposition (RPLD) technique. For the first time, the composition evaluated from proton elastic backscattering spectrometry, in a quantitative manner, revealed a dependence on the partial pressure of nitrogen from 1 to 10 Pa. Grazing incidence-XRD (GI-XRD) confirmed the formation of predominantly nanocrystalline TiN phase with a crystallite size of around 30?nm. The hardness showed maximum value of ~30 GPa when the composition is near stoichiometric and the friction coefficient was found to be as low as 0.3. In addition, a systematic optical response was observed as a function of deposition pressure from the surface of the TiN films using spectroscopic ellipsometry. 1. Introduction Titanium nitride (TiN), by virtue of its high hardness, high melting point, low density, chemical stability, corrosion resistance, low coefficient of friction, lower wear rate, and so forth, is the most extensively used protective coating material [1–4]. All these properties depend on the coating techniques and vary as a function of deposition conditions. Amongst the gamut of available techniques, reactive pulsed laser deposition (RPLD) has distinct advantages to deposit ceramic films using metallic targets. Despite large volume of published work on TiN synthesis using RPLD, none brings out a clear recipe for synthesizing high-quality TiN films with desired stoichiometry, structure and morphology. For many applications, quantitative evaluation of the composition is very essential as the properties of TiN are closely related to its stoichiometry [1]. Till date there is only one research article that attempted to study the systematic evolution of structure in RPLD grown TiN films and a review article which summarized those results was published in 2002 [5, 6]. Even that article did not report quantitative compositional variation with nitrogen pressure and proposed the deposition of nanocrystalline TiN films over a range of deposition pressures (0.7 to 7?Pa) without accounting for the finer variations in the given range. In fact, the ellipsometry was used in-situ by Heil et al. to monitor, in-situ, the thickness of the films rather than to characterize the optical properties [7]. Though qualitative, in a recent work, we presented a novel secondary-ion-mass-spectrometry (SIMS) based methodology for optimization of three important process parameters, namely, deposition pressure, substrate temperature and pulse energy [8]. As relative sensitivity of elemental factors arising from the matrix effects are little
Liposomal Iron for Iron Deficiency Anemia in Women of Reproductive Age: Review of Current Evidence  [PDF]
Parag Biniwale, Bhaskar Pal, Tripura Sundari, Gorakh Mandrupkar, Nikhil Datar, Amandeep Singh Khurana, Amit Qamra, Salman Motlekar, Rishi Jain
Open Journal of Obstetrics and Gynecology (OJOG) , 2018, DOI: 10.4236/ojog.2018.811100
Abstract: Iron deficiency anemia is the most frequent nutritional deficiency disorder. Conventionally administered oral iron is associated with gastrointestinal intolerance that affects the outcomes and compliance. Liposomal iron is associated with increased absorption without causing significant adverse effects. In this review, we have discussed the technology of liposomal iron preparation, mechanisms of its absorption and clinical evidence on its utility in iron deficiency states in pregnant and non-pregnant women. Based on the available evidence, we compared liposomal iron to conventional oral iron. Encapsulation of micronized iron in liposomes is associated with lesser exposure to gastric contents, lesser interaction with food contents, no exposure to different digestive juices, targeted delivery of iron and allows lower doses to be administered in lieu of direct absorption without need for protein carriers. The available evidence suggests that liposomal iron significantly increases hemoglobin, ferritin levels in pregnant women as well as in women with iron deficiency.
Heme Iron Polypeptide in Iron Deficiency Anemia of Pregnancy: Current Evidence  [PDF]
Bhaskar Pal, Hemant Deshpande, Tripura Sundari, Parag Biniwale, Kamlesh Shah, Sugandh Goel, Amandeep Singh Khurana, Amit Qamra, Salman Motlekar, Hanmant Barkate
Open Journal of Obstetrics and Gynecology (OJOG) , 2017, DOI: 10.4236/ojog.2017.74044
Abstract: Iron deficiency is the most common nutritional deficiency leading to anemia in pregnancy. Conventionally, non-heme form of iron salts has been the mainstay of treatment. However, patient compliance is an important concern with existing oral iron therapy due to gastrointestinal side effects. Heme iron, a better bioavailable and tolerable form of iron can be suitable form of iron for supplementation in pregnancy. Evidence suggests its utility in pregnancy for treatment of iron deficiency anemia with benefits extending to postpartum period. Effective transfer across placenta to fetus further supports its utility in pregnancy. This review discusses in details the absorption kinetics along with clinical evidence on efficacy, safety, and tolerability of heme-iron supplementation in iron deficiency anemia of pregnancy.
Temperature dependence of dielectric constants in Titanium Nitride
S. Tripura Sundari,R. Ramaseshan,Feby Jose,S. Dash,A. K. Tyagi
Physics , 2013,
Abstract: The temperature dependence of optical constants of titanium nitride thin ?lm is investigated using spectroscopic ellipsometry between 1.4 to 5 eV in the temperature range 300 K to 650 K in steps of 50 K. The real and imaginary parts of the dielectric functions "1(E) and "2(E) increase marginally with increase in temperature. A Drude Lorentz dielectric analysis based on free electron and oscillator model are carried out to describe the temperature behavior. The parameters of the Lorentz oscillator model also showed that the relaxation time decreased with temperature while the oscillator energies increased. This study shows that owing to marginal change in the refractive index with temperature, titanium nitride can be employed for surface plasmon sensor applications even in environments where rise in temperature is imminent.
Optical properties and hardness of highly a-axis oriented AlN films
Feby Jose,R. Ramaseshan,S. Tripura Sundari,S. Dash,M. S. R. N. Kiran,A. K. Tyagi,U. Ramamurty
Physics , 2012,
Abstract: This paper reports optical and nanomechanical properties of seldom studied highly a-axis oriented AlN thin films for the first time. These films were deposited by reactive DC magnetron sputtering technique at an optimal target to substrate distance of 180 mm. Bragg-Brentano geometry X-ray and rocking curve (FWHM = 52 arcsec) studies confirmed the preferred orientation. Spectroscopic ellipsometry revealed that these films exhibit a refractive index of 1.93 at a wavelength of 546 nm. The hardness and elastic modulus of these films were 17 GPa and 190 GPa, respectively. The mechanical properties obtained here are much higher than the earlier reported and therefore can be useful as protective coating in thermo printing devices, piezoelectric films in bulk acoustic wave resonators.
Epidemological Association of Tuberculosis and HIV in Visakhapatnam District
M. Padma Sundari,B. Dharani Priya
Asian Journal of Medical Sciences , 2013,
Abstract: The object of our study is to observe the epidemiological distribution and association of Tuberculosis (TB) co-infection with HIV among the Visakhapatnam zone of Andhrapradesh. It is mainly due to Tuberculosis and HIV has been closely linked and HIV infection has contributed to a significant increase in the worldwide incidence of tuberculosis. According to WHO, the proportion of TB cases co-infected with HIV was also found rising being 2-10 times greater for 1997 estimates than for 19902. By producing a progressive decline in cell-mediated immunity, HIV alters the pathogenesis of tuberculosis, greatly increasing the risk of developing disease in co-infected individuals and leading to more frequent extra pulmonary involvement and atypical radiographic manifestations. In the present analysis it was found that in new smear pulmonary TB cases; there was an increase trend in number of cases in both male and female. According to smear positive and smear negative TB cases, male are more prone to TB (71.77% smear positive and 63.83% smear negative) than female (28.22% smear positive and 36.16% smear negative). In all the TB cases registered through RNTCP 4186 TB Patients are reported to be tested for HIV before or during the treatment. Out of those 4,186 cases, 558 are HIV positive.
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