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Nireekshana T.,VNRVJIET | Kesava Rao G.,Vasireddy Venkatadri Institute of Technology | Siva Naga Raju S.,Jawaharlal Nehru Technological University Kakinada
International Journal of Electrical Power and Energy Systems | Year: 2012

Determination and enhancement of Available Transfer Capability (ATC) are important issues in deregulated operation of power systems. This paper investigates the use of FACTs devices, like SVC and TCSC, to maximize power transfer transactions during normal and contingency situations. ATC is computed using Continuation Power Flow (CPF) method considering both thermal limits and voltage profile. Real-code Genetic Algorithm (RGA) is used as an optimization tool to determine the location and controlling parameters of SVC and TCSC. The suggested methodology is tested on IEEE 14-bus system and also on IEEE 24-bus reliability test system for normal and different contingency cases. © 2012 Elsevier Ltd. All rights reserved.


Mohan T.M.,Vasireddy Venkatadri Institute of Technology | Krishna T.V.,Vasireddy Venkatadri Institute of Technology
Physics and Chemistry of Liquids | Year: 2013

The molecular interactions between the polar systems of propan-1-ol (1PN) with alkyl benzoates (methyl benzoate and ethyl benzoate) for various mole fractions at different temperatures are studied by determining the dielectric permittivity in radio, microwave and optic frequency regions, respectively. Dipole moment, excess dipole moment, excess Helmholtz free energy, excess permittivity, relaxation time, excess inverse relaxation time and excess thermodynamical values are calculated using experimental data. Hamiltonian quantum mechanical calculations are performed on both pure and equimolar binary systems of 1PN with alkyl benzoates for the measurement of dipole moment from the ab initio Hartree-Fock and density functional theory (B3LYP) methods with 6-31 + G* and 6-311 + G** basis sets using Spartan 08 modelling software and these theoretical values are in good agreement with the experimental values. © 2013 Copyright Taylor and Francis Group, LLC.


Shaik A.M.,Vasireddy Venkatadri Institute of Technology | Rao V.V.S.K.,Andhra University | Rao C.S.,Andhra University
International Journal of Advanced Manufacturing Technology | Year: 2014

Manufacturers throughout the world are facing major new challenges, including shorter product life cycles and increasing competition. As companies strive to rationalize engineering design, manufacturing, and support processes and to produce a large variety of products at lower costs, modularity is becoming a focus. This paper reviews the methodologies for determining modular manufacturing systems while considering cost and performance. The manufacturing concept, termed modular production systems and modular manufacturing systems are aimed specifically at “hard” low to medium technology products, as typified by goods such as children’s toys and kitchen appliances. It was proposed to increase the flexibility of the manufacturing operation in terms of its range of function, product, and service by modularizations and its ability to be easily reconfigured in the face of changing conditions. © 2014, Springer-Verlag London.


Prasad R.S.R.,Acharya Nagarjuna University | Alla K.,Vasireddy Venkatadri Institute of Technology
ISWTA 2011 - 2011 IEEE Symposium on Wireless Technology and Applications | Year: 2011

The tremendous growth in the use of Internet has led to a continuous improvements in the area of security. The improved security techniques are used to preserve the intellectual property. There are many kinds of security mechanisms. New steganographic methods are proposed to embed secret information into a text cover media to search for new possibilities for employing new languages other than English. Here in this paper the authors propose two new methods using Linguistic steganography. By taking the help of Telugu consonant character modifiers and its punctuation marks authors have developed security mechanisms. These markers can be efficiently used as information carriers to hide information into a cover text. In this paper the authors propose a few text based steganographic methods. The proposed methods work by using the linguistic properties of Telugu language. The first method selects embed position of the secret information in the cover text by using Telugu Ottulu. Based on the two level classification of Ottulu, they are assigned a bit 0 or a bit 1. These symbols embed the secret information in the third character of Telugu cover Text data. It maps a single bit of the data with a Telugu character in the specified manner. The second method uses the Telugu linguistic punctuation marks classification. These punctuation marks are classified using a four level classification. Using a four level classification, these punctuation marks are encoded with a 00, 01, 10 and 11 respectively. Secret information is embedded in a Telugu Text. Whenever the application sees a certain punctuation mark it codes this one as secret information. At the receiving side, corresponding opposite methods are applied to get back the original secret message. To improve it further, the information has been encrypted using various cryptographic methods and then this cipher text can also be embedded in the cover text. © 2011 IEEE.


Krishna T.V.,Vasireddy Venkatadri Institute of Technology | Sastry S.S.,Acharya Nagarjuna University | Murthy V.R.K.,Indian Institute of Technology Madras
Indian Journal of Physics | Year: 2011

The dielectric and thermodynamic studies on polar binary mixtures of N-methyl aniline with alcohols - propan-1-ol and propan-2-ol have been carried out, at different temperatures and mole fractions. LF impedance analyzer, Microwave bench and Abbe's refractometer are used respectively in radio, microwave (X-Band) and high frequency regions to determine the dielectric data. The experimental data is used to correlate the dielectric and thermodynamic parameters - static permittivity, high frequency permittivity, Kirkwood effective correlation factor, corrective Kirkwood correlation factor, excess permittivity, excess Helmholtz free energy, dipole moment, excessive dipole moment, relaxation time, excess inverse relaxation time and the excess thermodynamic parameters. These parameters are used to interpret the molecular interactions between the molecular species of the liquid mixtures. © 2011 IACS.


Krishna T.V.,Vasireddy Venkatadri Institute of Technology | Sastry S.S.,Acharya Nagarjuna University | Murthy V.R.K.,Indian Institute of Technology Madras
Indian Journal of Physics | Year: 2011

The dielectric relaxation studies on polar binary mixtures of N-methyl aniline with, alcohols, propan-1-ol and isopropyl alcohol have been carried out, at different temperatures and mole fractions, using - LF impedance analyzer, Plunger method and Abbe's refractometer in radio, microwave and optic frequency regions respectively. Kirkwood effective correlation factor, corrective Kirkwood correlation factor, Bruggeman parameter, relaxation time and thermodynamical parameters are calculated using the experimental data. Conformational analysis of the formation of hydrogen bond in the equi molar binary mixture systems of N-methyl aniline with propan-1-ol and isopropyl alcohol is supported by experimental and theoretical FT-IR values. © 2011 IACS.


Vijaya Krishna T.,Vasireddy Venkatadri Institute of Technology | Madhu Mohan T.,Hindu College Techno Campus
Journal of Chemical Thermodynamics | Year: 2012

Molecular interactions between the polar systems N-methyl aniline and alcohols (propan-1-ol/propan-2-ol) for various mole fractions at different temperatures are studied by determining the dielectric permittivity using LF impedance analyzer, Microwave bench and Abbe's refractometer in radio, microwave and optic frequency regions respectively. The dipole moment, excess dipole moment, excess Helmholtz energy, excess permittivity, excess inverse relaxation time and excess thermodynamic values are calculated using experimental results. The optimized geometry, harmonic vibrational wave numbers and dipole moments of pure and equimolar binary mixtures have been calculated theoretically from the ab initio Hartree-Fock (HF) and Density Functional Theory (DFT - B3LYP) methods with 6-31+G and 6-311+G basis sets using Spartan 08 modelling software. Conformational analysis of the formation of hydrogen bond in the equimolar binary mixture systems of N-methyl aniline and alcohols (propan-1-ol/propan-2- ol) is supported by experimental FT-IR spectra. The calculated wave numbers and dipole moments agree well with the experimental values. Further, the correlations among the parameters are discussed in detail. © 2011 Elsevier Ltd. All rights reserved.


Rao R.R.,Koneru Lakshmaiah College of Engineering | Gouthami K.,Koneru Lakshmaiah College of Engineering | Kumar J.V.,Vasireddy Venkatadri Institute of Technology
Tribology in Industry | Year: 2013

A generalized form of Reynolds equation for two symmetrical surfaces is taken by considering velocity-slip at the bearing surfaces. This equation is applied to study the effects of velocity-slip and viscosity variation for the lubrication of squeeze films between two circular plates. Expressions for the load capacity and squeezing time obtained are also studied theoretically for various parameters. The load capacity and squeezing time decreases due to slip. They increase due to the presence of high viscous layer near the surface and decrease due to low viscous layer. © 2013 Published by Faculty of Engineering.


Rahman M.Z.U.,Koneru Lakshmaiah College of Engineering | Karthik G.V.S.,Coimbatore Institute of Technology | Fathima S.Y.,Vasireddy Venkatadri Institute of Technology | Lay-Ekuakille A.,University of Salento
Measurement: Journal of the International Measurement Confederation | Year: 2013

Nowadays telecardiology is an important tool in cardiac diagnosis from a remote location. During Electrocardiogram (ECG) or Cardiac Signal acquisition several artifacts strongly affect the ST segment, degrade the signal quality, frequency resolution, produce large amplitude signals in ECG that can resemble PQRST waveforms and mask the tiny features that are important for clinical monitoring and diagnosis. So the extraction of high-resolution cardiac signals from recordings contaminated with artifacts is an important issue to investigate. In this paper, various novel block based time-frequency domain adaptive filter structures for cardiac signal enhancement are presented. These filters estimate the deterministic components of the cardiac signal and remove the noise component. The Block Leaky Least Mean Square (BLLMS) algorithm, being the solution of the steepest descent strategy for minimizing the mean squared error in a complete signal occurrence, is shown to be steady-state unbiased and with a lower variance than the LMS algorithm. To improve the filtering capability some variants of BLLMS, Block Normalized LLMS (BNLLMS) and Block Error Normalized LLMS (BENLLMS) algorithms are implemented in both time domain (TD) and frequency domains (FD). Finally, we have applied these algorithms on real cardiac signals obtained from the MIT-BIH data base and compared their performance with the conventional LLMS algorithm. The results show that the performance of the block based algorithms is superior to the LLMS counterparts in terms of signal to noise ratio improvement (SNRI), excess mean square error (EMSE) and misadjustment (M). Among all the algorithms FDBENLLMS achieves higher SNRI than other techniques. These values are 25.8713 dB, 20.1548 dB, 21.6718 dB and 20.7131 dBs for power line interference (PLI), baseline wander (BW), muscle artifacts (MA) and electrode motion artifacts (EM) removal. © 2013 Elsevier Ltd. All rights reserved.


Krishna T.V.,Vasireddy Venkatadri Institute of Technology
Journal of Solution Chemistry | Year: 2010

The molecular interactions between the polar systems isopropyl alcohol (IPA) and aniline for various mole fractions at different temperatures were studied by determining the dielectric permittivity using an HP-LF impedance analyzer at radio frequencies, the plunger method in the microwave frequency range and Abbe's refractometer in optical region. Kirkwood effective correlation factors, corrective Kirkwood correlation factors, excess permittivities, Bruggeman parameters, excess Helmholtz free energy, relaxation time, dipole moment and excessive dipole moment were calculated using the experimental data. Optimized geometries were calculated using Spartan Modeling software for both pure and equimolar systems of isopropyl alcohol and aniline for Hamiltonian quantum mechanical calculations. Conformational analysis of the formation of hydrogen bond between the two systems is supported by the FT-IR spectra. © 2010 Springer Science+Business Media, LLC.

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