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Search Results: 1 - 10 of 389574 matches for " Revathy N. and Balasubramanian R. "
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FSVML AND GA-FSVML WRAPPER APPROACHES FOR GENE SELECTION AND CLASSIFICATION USING EXPRESSIONS OF VERY FEW GENES
Revathy N. and Balasubramanian R.
International Journal of Genetics , 2012,
Abstract: Recently, Gene expression profiling by microarray technique has been effectively utilized for classification and diagnostic guessing of cancer nodules in the field of medical sciences. But the techniques used for cancer classification is still in its lower level. There are various drawbacks in the existing classification techniques such as low testing accuracy, high training time, unreliability, etc. Moreover, microarray data consists of a high degree of noise. Gene ranking techniques such as T-Score, ANOVA, etc are later proposed to overcome those problems. But those approaches will sometimes wrongly predict the rank when large database is used. To overcome these issues, this paper mainly focuses on the development of an effective feature selection and classification technique for microarray gene expression cancer diagnosis for provide significant accuracy, reliability and less error rate. In this paper, Wrapper feature selection approach called the GA-FSVML approach is used for the effective feature selection of genes. In FSVML, the RBF kernel function in SVM is trained using modified Levenberg Marquadt algorithm. This approach proposes a Fast SVM Learning (FSVML) technique for the classification tasks. The experiment is performed on lymphoma data set and the result shows the better accuracy of the proposed FSVML with GA-FSVML classification approach when compared to the standard existing approaches.
An Assessment of Preventable Risk Factors for Chronic Non-Communicable Diseases in an Adult Population
N.P. Kumar,H.S. Shankaregowda,R. Revathy
Asian Journal of Epidemiology , 2011,
Abstract: To assess the prevalence of selected risk factors for chronic disease and the association of these risk factors with sociodemographic variables, a cross sectional study was conducted in a representative sample of adults aged 40 years or more in the district of Shimoga. A sample of 992 subjects was selected from all the blocks of the district using the World Health Organizations STEPwise approach to surveillance of chronic disease risk factors. The study participants blood pressure was measured; their body mass index calculated and collected information on self-reported smoking status. The extent to which, being overweight, hypertension, smoking and various combinations of these risk factors were associated with the study participants education level, occupational category and economic status was measured. Data analysis was done using SPSS version 14 and multivariate logistic regression model to note the associations between the outcome variables and select demographic variables. Mean blood pressure levels were higher among men than among women and increased progressively with age. Sixty three percent of men were current smokers and 58% were current daily smokers; less than 1% of women smoked. Mean body mass index was 19.6 among men and 19.9 among women and only 3.5% of the population was overweight. Education level was inversely associated with the prevalence of hypertension among both men and women and with the prevalence of smoking among men. Hypertension was directly associated with socioeconomic status among men but inversely associated with socioeconomic status among women. India is experiencing an increase in the prevalence of many risk factors for chronic diseases and is in urgent need of interventions to reduce the prevalence of these risk factors and to deal with the chronic diseases to which they contribute.
Performance Measurement of Web Applications Using Automated Tools
R. Thirumalai Selvi,N. V. Balasubramanian
Lecture Notes in Engineering and Computer Science , 2013,
Abstract:
Slow Adaptive OFDMA Systems ThroughChance Constrained Programming
N. Revathy,T. Guhan
International Journal of Computer Science Issues , 2012,
Abstract: —Adaptive orthogonal frequency division multiple Access (OFDMA) has recently been recognized as a promising Technique for providing high spectral efficiency in future broadband Wireless systems. The research over the last decade on Adaptive OFDMA systems has focused on adapting the allocation Of radio resources, such as sub carriers and power, to the instantaneous Channel conditions of all users. However, such “fast” adaptation requires high computational complexity and excessive signalling overhead. This hinders the deployment of adaptive OFDMA systems worldwide. This paper proposes a slow adaptive OFDMA scheme, in which the sub carrier allocation is updated on a much slower timescale than that of the fluctuation of instantaneous channel conditions. Meanwhile, the data rate requirements of individual users are accommodated on the fast timescale with high probability, thereby meeting the requirements except occasional outage. Such an objective has a natural chance constrained programming formulation, which is known to be intractable. To circumvent this difficulty, we formulate safe tractable constraints or the problem based on recent advances in chance constrained programming. We then develop a polynomial-time algorithm for computing an optimal solution to the reformulated problem. Our results show that the proposed slow adaptation scheme drastically reduces both computational cost and control signalling overhead when compared with the conventional fast adaptive OFDMA.
HDL IMPLEMENTATION OF ALGEBRAIC SOFT DECISION ALGORITHM FOR RS CODES
M. Revathy,R. Saravanan
International Journal of Computer Science and Mobile Computing , 2013,
Abstract: Reed Solomon (RS) codes are widely used to detect and correct data errors in transmission andstorage systems. Hence it is used in many digital communication and storage devices. In existing systemReformulated inversion less Burst error correcting (RiBC) algorithm is used. But it lacks in speed,throughput & area. To overcome this Algebraic Soft Decision (ASD) algorithm is proposed. This Proposedalgorithm is based on Unified VLSI architecture for correcting burst errors as well as random errors. Thisnew architecture is denoted as Unified Hybrid Decoding (UHD) architecture. It will be shown that, being thefirst RS decoder owning enhanced burst-error correcting capability, it can achieve high-speed, throughputand improved error correcting capability than traditional Hard Decision Decoding (HDD) design with lessarea.
Implementation Of Modified Rice Algorithm Based On Curve Fitting Techniques
PRATHEEKA PAULOSE, REVATHY R.NAIR, ROSE MARIA THOMAS, SHWETHA D.MALLIA, NAVEEN N, PANKAJ SAGAR
International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering , 2013,
Abstract: Data compression algorithms are widely used by data communication systems and data storage systems to reduce the amount of data transferred and stored. This paper introduces a modified Rice algorithm for data compression using the mathematical curve fitting models. A comparison between data compression using ordinary rice algorithm and data compression using the proposed rice algorithm is also presented. The design can be implemented as state machines in Verilog, in such a way that they are suitable for implementation using FPGA.
Framework and Architectural Style Metrics for Component Based Software Engineering
R. Thirumalai Selvi,N. V. Balasubramanian,George T.Manohar
Lecture Notes in Engineering and Computer Science , 2008,
Abstract:
Hepatoprotective Activity on Vitex negundo Linn. (Verbenaceae) by using Wistar Albino Rats in Ibuprofen Induced Model
R. Mahalakshmi,P. Rajesh,N. Ramesh,V. Balasubramanian
International Journal of Pharmacology , 2010,
Abstract: The present study was intended to evaluate the hepatoprotective activity on ethanolic extract of leaves of Vitex negundo was determined by using Wistar Albino rats in male sex. The V. negundo Linn. is a natural plant product, in it’s the leaves are used with the added advantage to revert Ibuprofen induced hepatotoxicity. Oral administration of ethanol extract of V. negundo (100 and 300 mg) produced a significant and dose dependent inhibition to the acute hepatotoxic induced rats and various parameters were analyzed, when compared with negative control V. negundo showed that the significant activity in 300 mg/kg/b.wt. They exhibited a significant inhibition of hepatic toxicity by using various marker enzymes and the histopathological analysis. The inhibitory effect of the V. negundo on hepatotoxicity was compared to that of positive control group. The various parameters such glucose, protein, triglycerides, bilirubin, urea, creatinine, ALP, ACP, SGPT, SGOT and histopathological parameters was measured by dissection the rats. A significant index and values were observed in the acute assays; an effective significant alteration in all biochemical and histopathological sections was observed. From these results, concluded that the V. negundo having the potential effectiveness at the dose of 300 mg/kg/b.wt., (p<0.01) significance in a dose dependent manner. These results suggest that leaves of V. negundo having the hepatoprotective activity, which support the hepatic cells protection.
Antiviral activity of ancient system of ayurvedic medicinal plant Cissus quadrangularis L. (Vitaceae)
Balasubramanian, K,Jayalakshmi, N.,Vidhya, R.,Prasad, A.
Journal of Basic and Clinical Pharmacy , 2010,
Abstract: Partially purified methanolic extract of Cissus quadrangularis (belonging to Vitaceae member, South Indian medicinal plant) have been explored for antiviral activity and their phytochemical characterisation. In vitro antiviral activity against HSV type1 and 2, and Vero cells at non-cytotoxic concentration were determined. HSV1 and HSV2 showed more sensitivity against the partially purified compound. Phytochemical analysis showed the presence of the Steroids and Terpenoids.
Burn-Up Measurements on Dissolver Solution of Mixed Oxide Fuel Using HPLC-Mass Spectrometric Method  [PDF]
S. Bera, R. Balasubramanian, Arpita Datta, R. Sajimol, S. Nalini, T. S. Lakshmi Narasimhan, M. P. Antony, N. Sivaraman, K. Nagarajan, P. R. Vasudeva Rao
International Journal of Analytical Mass Spectrometry and Chromatography (IJAMSC) , 2013, DOI: 10.4236/ijamsc.2013.11007
Abstract:

Burn-up measurement on an irradiated mixed oxide (MOX) test fuel pellet was carried out through measurements on the dissolver solution by HPLC-Thermal Ionization Mass Spectrometric (TIMS) technique. The studies carried out using HPLC as well as TIMS for quantification of burn-up value are described. While in one case, both the separation and determination of elements of interest (U, Pu and Nd) were carried out by HPLC; in another case, TIMS technique was used to quantify them from the HPLC separated fractions.The rapid separation procedures developed in our laboratory earlier were employed to isolate pure fractions of the desired elements. The individual lanthanide fission products (La to Eu) were separated from each other using dynamic ion-exchange chromatographic technique whereas uranium and plutonium were separated from each other using reversed phase chromatographic technique. The pure fractions of U, Pu and Nd obtained after HPLC separation procedure for “spiked” and “unspiked” dissolver solutions were used in TIMS measurements for the first time in our laboratory. In TIMS analysis, isotopic abundances of uranium, plutonium and neodymium fractions obtained from HPLC separation procedure on an “unspiked” fuel sample were measured. For the determination of U, Pu and Nd by isotopic dilution mass spectrometric technique (IDMS), known quantities of tracers enriched in 238U, 240Pu and 142Nd were added to the pre-weighed dissolver solution and subjected to HPLC separation procedures. The isotope ratios viz. 142Nd/(145Nd +146Nd), 238U/233U and 240Pu/239Pu in the pertinent “spiked” fractions were subsequently measured by TIMS. The spikes were pre-standardized in our laboratory employing reverse isotopic dilution technique against the standard solutions available in our laboratory (for 238U, 239Pu and 142Nd, standard solutions of 233U, 239Pu (of higher abundance than in the sample) and 150Nd were employed as spikes). The burn-up values from duplicate spiking experiments were computed based on the summation of 145Nd + 146Nd. The concentrations of neodymium, uranium and plutonium were also measured using HPLC with post-column derivatisation technique using aresenazo(III) as the post-column reagent. The atom % burn-up computed from HPLC and TIMS techniques were in good agreement.

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