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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Kumara Swamy N.,Vasi Reddy Venkataadri Institute of Technology | Sashidhar C.,Jawaharlal Nehru Technological University Anantapur
International Journal of Civil Engineering and Technology | Year: 2017

The objective of this research article is to identify the most critical safety influencing variables of a section of four-lane National Highway-18(old)/40(New) through statistical models that explains the relationship between frequency of accident count and highway safety variables. The Highway traverses mainly through a plain terrain of mostly agricultural areas. The study is for newly constructing Four-Lane road between chainage 224.000 (Chagalamarri) to 359.9(Kurnool) to identify all safety deficiencies responsible for road accidents. The predictive ability using Multiple linear regression model is under two categories: First for the 2 lane sections and second for 4 lane sections separately. The validation tools were applied to examine the ability of models to predict accidents. © 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.


Sunitha K.,Indian Institute of Chemical Technology | Satyanarayana S.V.,Jawaharlal Nehru Technological University Anantapur | Sridhar S.,Indian Institute of Chemical Technology
Carbohydrate Polymers | Year: 2012

Dense membranes of chitosan were prepared and ionically crosslinked with phosphoric acid for varying intervals of time. The membranes were characterized by FTIR and XRD to confirm cross-linking. TGA and IEC studies were conducted to assess the thermal stability and estimate the number of interactive groups left in the membrane after crosslinking. Sorption studies were carried out to evaluate the extent of interaction and degree of swelling of the membranes in pure liquids as well as binary mixtures. The phosphorylated chitosan membrane crosslinked for 2 h showed good mechanical strength and strong potential for breaking the azeotrope of 95.58 wt% ethanol by exhibiting a high pervaporation selectivity of 213 with substantial water flux of 0.58 kg/(m2 h). Pervaporation experimental parameters such as feed composition, membrane thickness and permeate pressure were varied to identify optimum operating conditions. © 2011 Elsevier Ltd. All rights reserved.


Ravikumar Y.V.L.,Indian Institute of Chemical Technology | Sridhar S.,Indian Institute of Chemical Technology | Satyanarayana S.V.,Jawaharlal Nehru Technological University Anantapur
Separation and Purification Technology | Year: 2013

Recovery of solvents from aqueous industrial effluents containing hazardous compounds is not directly feasible by conventional methods due to the complex nature of such wastewaters. An effluent from a pharmaceutical industry contains 2-3 wt% explosive sodium azide + corrosive ammonium chloride salts, 15-20% dimethylsulfoxide (DMSO) solvent and water. The focus of this work is to establish a hybrid process to facilitate removal of salts by electrodialysis (ED) followed by distillation to recover DMSO. An indigenously constructed ED system of 1.05 m2 membrane area was used to process 10 L batch size. Pure DMSO was recovered from desalted liquor by vacuum distillation in two stages to obtain DMSO concentration up to 60-70% in the first stage and subsequent recovery of pure DMSO in the second. Effect of operating parameters such as flow rate, limiting current density and voltage was evaluated. Distillation was carried out at 20-30 mmHg at reboiler temperature below 150 °C. Drug prepared using the recycled DMSO (>99.5%) was found to meet desired specifications. Detailed design of the ED-distillation process scheme to treat 7500 L/day of the effluent revealed that it was technically and economically feasible, since 30 Metric Tonnes of solvent has been recovered by the industry. © 2013 Elsevier B.V. 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.


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: 2012

The main focus of this study is to utilize waste grass broom natural fibers as reinforcement and polyester resin as matrix for making partially biodegradable green composites. Thermal conductivity, specific heat capacity and thermal diffusivity of composites were investigated as a function of fiber content and temperature. The waste grass broom fiber has a tensile strength of 297.58MPa, modulus of 18.28GPa, and an effective density of 864kg/m3. The volume fraction of fibers in the composites was varied from 0.163 to 0.358. Thermal conductivity of unidirectional composites was investigated experimentally by a guarded heat flow meter method. The results show that the thermal conductivity of composite decreased with increase in fiber content and the quite opposite trend was observed with respect to temperature. Moreover, the experimental results of thermal conductivity at different volume fractions were compared with two theoretical models. The specific heat capacity of the composite as measured by differential scanning calorimeter showed similar trend as that of the thermal conductivity. The variation in thermal diffusivity with respect to volume fraction of fiber and temperature was not so significant. The tensile strength and tensile modulus of the composites showed a maximum improvement of 222% and 173%, respectively over pure matrix. The work of fracture of the composites with maximum volume fraction of fibers was found to be 296Jm-1. © 2012 Elsevier Ltd.

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