Jawaharlal Nehru Technological University Anantapur

jntua.ac.in
Anantapur, India

Jawaharlal Nehru Technological University, Anantapur is a state university in Anantapur, Andhra Pradesh, India. Founded in 1946, it has since 1972 been a constituent college of Jawaharlal Nehru Technological University, as set by The Jawaharlal Nehru Technological University Act, 1972. In 2008 it had received autonomous status by the Jawaharlal Nehru Technological Universities Act, 2008. Wikipedia.

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Surya M.S.,Jawaharlal Nehru Technological University Anantapur | Prasanthi G.,Jawaharlal Nehru Technological University Anantapur
Materials Today: Proceedings | Year: 2017

In the present work Manufacturing of Al-SiC functionally graded materials using powder metallurgy have been discussed, four specimens have been manufactured with three layers in each varying the composition of aluminum and silicon carbide, and the characteristics of the specimens have been studied using Microscope (100X Magnification). Failure of samples occurred when SiC content was increased beyond 15%, this is due high brittleness and less bonding of aluminum-aluminum particles. Samples with SiC content of up to 10% could be manufactured successfully. © 2017 Elsevier Ltd. All rights reserved.


Dhani R.,Jawaharlal Nehru Technological University Anantapur
Journal of Chemical and Pharmaceutical Research | Year: 2012

In the past two decades, a wide variety of bioactive peptides have been discovered. Many of the heterocyclic found to exhibit antifungal, antibacterial, cytotoxic, antineoplastic, insecticidal, anti-inflammatory, tyrosinase inhibitory and melanin production inhibitory activities.Imidazole has been drawn as promising structural units in the field of medicinal chemistry. Introduction of D-amino acids and N-methylation of amino acids like tyrosine, valine, alanine etc enhanced antimicrobial activity. Hence an attempt is made towards the sythesis of 5-nitroimidazolyl-benzoic acid derivative of N-methyl amino acids and peptide using solution phase technique of peptide synthesis.


Alavala C.R.,Jawaharlal Nehru Technological University Anantapur
International Journal of Mechanical Engineering and Technology | Year: 2016

In this study, the effects of BN amount on hardness and wear behaviors of AA1100-BN composites produced by stir casting route were investigated. Within the scope of work, different amount of BN (10, 20 and 30%) added to AA1100 matrix. Wear tests were performed in a pin on type wear apparatus under 10,20, 30 N with different sliding speeds 2, 3 and 4 m/s, at three different sliding distances (500, 750 and 1000 m). A plan of experiments in terms of Taguchi technique is carried out to acquire data in controlled way. An orthogonal array (L9) and the analysis of variance are employed to investigate the influence of process parameters on the wear of these composites. Weight loss functions were designed to determine the lower and upper safety limits of wear rate based on 87th percentile of Weibull probability tests. It was found that in terms of weight loss, there was a good agreement between the theoretical and the experimental value of wear rate with an error of 1.014%. Moreover, volume fraction of BN, applied load, sliding speed and sliding distance exerted the tolerable wear rates of 0.01441, 0.01490, 0.01286 and 0.01535 mg/m, respectively. © IAEME Publication.


Rajesh N.,Jawaharlal Nehru Technological University Anantapur | Yohan M.,Jawaharlal Nehru Technological University Anantapur
International Journal of Mechanical Engineering and Technology | Year: 2016

Aluminium Metal Matrix Nano Composites (AMMNCs) are very promising materials featuring for physical and mechanical properties very different from those of the Metal Matrix Composites (MMCs). The nano particle can enhance the properties of the base material in terms of wear resistance, damping properties and mechanical strength. This paper is focused on reviewing the processing of Nanocomposites and the effect of addition on different Nano reinforcements in aluminium alloy highlighting its merits and demerits. Effect of different reinforcements on AMMNCs on the mechanical properties like tensile strength, hardness, wear and fatigue is also studied in detail. © 2016 IAEME Publication.


Ramesh M.,Jawaharlal Nehru Technological University Anantapur | Palanikumar K.,Sri Sai Ram Institute of Technology | Reddy K.H.,Jawaharlal Nehru Technological University Anantapur
Composites Part B: Engineering | Year: 2013

The composite materials are replacing the traditional materials, because of its superior properties such as high tensile strength, low thermal expansion, high strength to weight ratio. The developments of new materials are on the anvil and are growing day by day. Natural fiber composites such as sisal and jute polymer composites became more attractive due to their high specific strength, lightweight and biodegradability. Mixing of natural fiber with Glass-Fiber Reinforced Polymers (GFRPs) are finding increased applications. In this study, sisal-jute-glass fiber reinforced polyester composites is developed and their mechanical properties such as tensile strength, flexural strength and impact strength are evaluated. The interfacial properties, internal cracks and internal structure of the fractured surfaces are evaluated by using Scanning Electron Microscope (SEM). The results indicated that the incorporation of sisal-jute fiber with GFRP can improve the properties and used as a alternate material for glass fiber reinforced polymer composites. © 2013 Elsevier Ltd. All rights reserved.


Srinivasa Rao R.,Jawaharlal Nehru Technological University Anantapur | Narasimham S.V.L.,University of Hyderabad | Ramalinga Raju M.,Jawaharlal Nehru Technological University Anantapur | Srinivasa Rao A.,Gandhi Institute of Technology and Management
IEEE Transactions on Power Systems | Year: 2011

Electrical distribution network reconfiguration is a complex combinatorial optimization process aimed at finding a radial operating structure that minimizes the system power loss while satisfying operating constraints. In this paper, a harmony search algorithm (HSA) is proposed to solve the network reconfiguration problem to get optimal switching combination in the network which results in minimum loss. The HSA is a recently developed algorithm which is conceptualized using the musical process of searching for a perfect state of harmony. It uses a stochastic random search instead of a gradient search which eliminates the need for derivative information. Simulations are carried out on 33- and 119-bus systems in order to validate the proposed algorithm. The results are compared with other approaches available in the literature. It is observed that the proposed method performed well compared to the other methods in terms of the quality of solution. © 2011 IEEE.


Rao R.S.,Jawaharlal Nehru Technological University Anantapur | Ravindra K.,Jawaharlal Nehru Technological University Anantapur | Satish K.,Jawaharlal Nehru Technological University Anantapur | Narasimham S.V.L.,University for Information Science and Technology
IEEE Transactions on Power Systems | Year: 2013

This paper presents a new method to solve the network reconfiguration problem in the presence of distributed generation (DG) with an objective of minimizing real power loss and improving voltage profile in distribution system. A meta heuristic Harmony Search Algorithm (HSA) is used to simultaneously reconfigure and identify the optimal locations for installation of DG units in a distribution network. Sensitivity analysis is used to identify optimal locations for installation of DG units. Different scenarios of DG placement and reconfiguration of network are considered to study the performance of the proposed method. The constraints of voltage and branch current carrying capacity are included in the evaluation of the objective function. The method has been tested on 33-bus and 69-bus radial distribution systems at three different load levels to demonstrate the performance and effectiveness of the proposed method. The results obtained are encouraging. © 2012 IEEE.


Ramanaiah K.,VR Siddhartha Engineering College | Ratna Prasad A.V.,VR Siddhartha Engineering College | Hema Chandra Reddy K.,Jawaharlal Nehru Technological University Anantapur
Materials and Design | Year: 2013

The objective of present work is to introduce sansevieria natural fiber as reinforcement in the preparation of partially biodegradable green composites. The effect of fiber content on mechanical properties of composite was investigated and found that tensile strength and impact strength at maximum fiber content were 2.55 and 4.2 times to that of pure resin, respectively. Transverse thermal conductivity of unidirectional composites was investigated experimentally by a guarded heat flow meter method. The thermal conductivity of composite decreased with increase in fiber content and the quite opposite trend was observed with respect to temperature. In addition, the experimental results of thermal conductivity at different volume fractions were compared with theoretical model. The response of specific heat capacity of the composite with temperature as measured by differential scanning calorimeter was discussed. Lowest thermal diffusivity of composite was observed at 90°C and its value is 0.9948E-07m2s-1.Fire behavior of composite was studied using the oxygen consumption cone calorimeter technique. The addition of sansevieria fiber has effectively reduced the heat release rate (HRR) and peak heat release rate (PHRR) of the matrix by 10.4%, and 25.7%, respectively. But the composite ignite earlier, release more amount of carbon dioxide yield and total smoke during combustion, when compared to neat polyester resin. © 2013 Elsevier Ltd.


Rao R.S.,Jawaharlal Nehru Technological University Anantapur | Narasimham S.V.L.,University of Hyderabad | Ramalingaraju M.,Jawaharlal Nehru Technological University Anantapur
International Journal of Electrical Power and Energy Systems | Year: 2011

This paper presents a new and efficient approach for capacitor placement in radial distribution systems that determine the optimal locations and size of capacitor with an objective of improving the voltage profile and reduction of power loss. The solution methodology has two parts: in part one the loss sensitivity factors are used to select the candidate locations for the capacitor placement and in part two a new algorithm that employs Plant Growth Simulation Algorithm (PGSA) is used to estimate the optimal size of capacitors at the optimal buses determined in part one. The main advantage of the proposed method is that it does not require any external control parameters. The other advantage is that it handles the objective function and the constraints separately, avoiding the trouble to determine the barrier factors. The proposed method is applied to 10, 34, and 85-bus radial distribution systems. The solutions obtained by the proposed method are compared with other methods. The proposed method has outperformed the other methods in terms of the quality of solution. © 2011 Elsevier Ltd. All rights reserved.


Arora P.K.,University of Hyderabad | Sasikala C.,Jawaharlal Nehru Technological University Anantapur | Ramana C.V.,University of Hyderabad
Applied Microbiology and Biotechnology | Year: 2012

Chlorinated nitroaromatic compounds (CNAs) are persistent environmental pollutants that have been introduced into the environment due to the anthropogenic activities. Bacteria that utilize CNAs as the sole sources of carbon and energy have been isolated from different contaminated and non-contaminated sites. Microbial metabolism of CNAs has been studied, and several metabolic pathways for degradation of CNAs have been proposed. Detoxification and biotransformation of CNAs have also been studied in various fungi, actinomycetes and bacteria. Several physicochemical methods have been used for treatment of wastewater containing CNAs; however, these methods are not suitable for in situ bioremediation. This review describes the current scenario of the degradation of CNAs. © Springer-Verlag 2012.

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