JNTUA

Anantapur, India
Anantapur, India
SEARCH FILTERS
Time filter
Source Type

Sharathbaburao D.,GPREC | Sumalatha V.,JNTUA
Proceedings of the International Conference on Inventive Computation Technologies, ICICT 2016 | Year: 2017

Emerging Multimedia, Network storage, Cloud application striggered the growing concern for high bandwidth implications and made a reason to expand the computer networks in terms of the cost per bit perspective. The Optimistic nature, Cost effectiveness, Availability from different vendors made Ethernet a best alternative for communication infrastructure in both Local Area Networks (LAN) and Wireless LAN's. From the beginning of this inception the prominent Ethernet experiencing a dramatic transformation and the link rates are substantially paces upto 400Gbps in LAN's. With the commencement of Wireless LAN protocol 802.11acwhich has outspread impact on industrial to avionics applications. The primary Objective of this paper is to introduce evolution of Ethernet in both wired and wireless fields of applications through the proliferation of MAC protocols.


Swamy S.M.,GNITS | Panndurangadu V.,JNTUA | Shamkumar J.M.,Airframe Aerospace Designs Pvt. Ltd.
International Journal of Mechanical Engineering and Technology | Year: 2017

Tip clearance effects on flow field of a low speed centrifugal compressor without and with partial shroud (PS) attached to the rotor blade tip at three values of tip clearance, viz. φ =2.2%, 5.1% and 7.9% of rotor blade height at the exit at three flow coefficients, namely, φ=0.12,0.18 (below design flow coefficient), φ=0.28 (design flow coefficient) and φ=0.34 (above design flow coefficient), is analysed computationally using structured multi block grid with fine grid in the tip clearance region. The paper aims to study several flow characteristics between blade channels using commercial flow solver ANSYS CFX 15.0 based on finite volume techniques. The centrifugal compressor in aerodynamic requirement is that edge velocities along the impeller channel passage surfaces like hub, shroud, pressure and suction surfaces vary smoothly without sudden decelerations, which cause flow separation leading to losses. Using the periodic boundaries and defined flow conditions at inflow / exit flow and blade rotations, the turbulent viscous flow between blade channels are computed. The efficiency related parameters using average quantities, besides flow pattern in terms of velocities, streamlines and pressure distribution on blade surfaces are graphically interpreted. An attempt is also made to study the influence of pressure loads on structural deformations in the chosen blade profile. This paper highlights aero-mechanical features of centrifugal impeller obtained from several numerical simulations, which are expected to provide a sound basis for further investigations. © IAEME Publication.


Ismail Y.,JNIAS JNTUA | Chandrasekhar K.B.,JNTUA | Gunasekaran V.,Sri Venkateswara College of Engineering
International Journal of Pharmacy and Pharmaceutical Sciences | Year: 2014

Objective: The objective of the work is to develop and validate a new, simple, highly sensitive RP-UPLC method for simultaneous estimation of Metolazone and Spironolactone in bulk and in its dosage forms.Methods: The method was developed on a reversed-phase Hypersil Gold C18 (2.1× 100 mm, 2.7 μm) column with isocratic elution. Detection was done by UV-Spectroscopy at a detection wavelength of 235 nm. The analytical procedure was validated by assessing the specificity, linearity, precision, accuracy, limit of detection, limit of quantification, robustness and ruggedness as per ICH guidelines.Results: The results were obtained as follows- the retention times were found to be around 2.888 min and 3.835 min, the percentage purity was observed to be 99% w/v and 100% w/v, the percentage recovery was found to be 99.90% and 99.9% respectively for Metolazone and Spironolactone. Calibration plots were linear (r2> 0.999) over the concentration range of 12 to 28μg/ml for Metolazolone and 120 to 280μg/ml for Spironolactone. The LOD was 0.0002μg/ml for Metolazone and 0.01μg/ml for Spironolactone. The LOQ was found to be 0.0008μg/ml for Metolazone and 0.003μg/ml for Spironolactone.Conclusion: The developed analytical method for the simultaneous quantitation of Metolazone and Spironolactone was found to be specific, rapid, reliable, and reproducible. No interference from any component of pharmaceutical dosage form was observed. The methodis amenable to the routine analysis of large numbers of samples with good precision and accuracy. © 2014, International Journal of Pharmacy and Pharmaceutical Science. All rights reserved.


Sreenivasulu A.L.,JNTUA | Reddy P.C.,JNTUA
Journal of Engineering Science and Technology Review | Year: 2017

In Wireless Sensor Networks (WSNs), data aggregation is defined as the method of acquiring sensed data from neighboring nodes and merged to send data to the base station. It is required to manage the limited in-network processing and storage capacity of nodes in the aggregation process with collaborative computing and also secure communication aspects. In this paper, double cluster head based secure aggregation method (DCSDA) is proposed. The method is more suitable for the cluster based communication strategy with security as a primary requirement with privacy and authentication. The experimental evaluation shows the performance of the DCSDA approach in terms of packet drop ratio, delay and energy consumption. The results proved the effectiveness of the DCSCA approach. © 2017. Eastern Macedonia and Thrace Institute of Technology.


Kanhere R.S.,P.A. College | Jayveera K.N.,JNTUA
International Journal of Pharmacy and Pharmaceutical Sciences | Year: 2015

Objective: Evaluation of anti-diabetic potential ofIxorapavetta in streptozotocin induced diabetic rats Methods: Diabetes was induced by thesingle dose of streptozotocin (65 mg/kg body weight i. p.) to female Wistarrats. Diabetic rats were stabilized for six day and from seventh day butenolic fraction of Ixorapavetta(BIP) was administered at a dose of 250 mg/kg, p. o. and 500 mg/kg for 3 weeks. Glibenclamide 10 mg/kg P. O. was used as a standard. The effects of BIP and standard drug on following parameters were recorded-body weight, blood glucose and various biochemical parameters like serum lipid profile eg. total cholesterol (TC) and triglyceride (TG), HDL-C, LDL-C and VLDL. At the end of the study oxidative stress markers like CAT, GSH, and lipid peroxidation were analyzed in the pancreases. Histopathological changes were studied in pancreases of representative animals of the each group. Results: Administration of butenolic fractionof Ixorapavetta(BIP) at a dose of 250 mg/kg, p. o. and 500 mg/kg, p. o did not show any significant change in blood glucose level of normoglycemic rats, whereas, oral glucose tolerance test depicted significant (P<0.001) reduction in blood glucose level at 30 to 60 min. In streptozotocininduced diabetic rats, BIP was found significantly beneficial in controlling elevated blood glucose level and serum lipid parameters. The findings were strengthening by improved antioxidant status in diabetic rats as well as protection towards pathological damage of pancreases. The results showed by 500 mg/kg of butenol fractionof Ixorapavettawere comparable with standard treatment of Glibenclamide 10 mg/kg. Conclusion: Butenolfractionof Ixorapavettapossessanti-diabetic action in streptozotocin induced diabetic rats. © 2015, International Journal of Pharmacy and Pharmaceutical Science. All rights reserved.


Ismail Y.,JNIAS JNTUA | Chandrasekhar K.B.,JNTUA | Gunasekaran V.,Sri Venkateswara College of Engineering
International Journal of Pharmacy and Pharmaceutical Sciences | Year: 2015

Objective: The objective of the work is to develop and validate a stability indicating, new, simple, highly sensitive RP-UPLC method for simultaneous estimation of Duloxetine and Mecobalamin in bulk and in its dosage forms. Methods: The Method was developed and excellent chromatographic separation was obtained on a reversed-phase Acquity UPLC BEH C18 (1.0 × 100 mm, 1.7 μm) column using an isocratic elution mode by the mobile phase using Methanol: Water (55:45). The flow rate of the mobile phase was 1.0mL/min and the total run time was 10 minutes. UV-Spectroscopic detection at a wavelength of 320 nm was performed and the column oven temperature was maintained at 40°C. The analytical procedure was validated by assessing the specificity, linearity, precision, robustness, ruggedness, limit of detection, limit of quantification and accuracy as per ICH guidelines. Results: The retention times in the standard solution having the concentration of 3 μg/ml and 75 μg/ml of Duloxetine & Mecobalamin were found to be around 4.320 and 5.320 min respectively. The percentage purity values are 99.71% w/v and 99.02% w/v. Calibration plots were linear (r2> 0.999) over the concentration range of 1.5 – 5.25 μg/ml and 37.5 – 131.25 μg/ml, the percentage recovery was found to be 99.74% and 99.82% for Duloxetine & Mecobalamin respectively. %RSD for system precision, method precision, robustness and ruggedness was found to be with in 2. The LOD 0.04791 μg/mL for Duloxetine and 0.4496 μg/mL for Mecobalamin. The LOQ was found to be 0.1452 μg/mL for Duloxetine and 1.3625 μg/mL for Mecobalamin. Conclusion: The method represents a fast analytical procedure for the simultaneous quantification of Duloxetine & Mecobalamin. The developed method requires lesser analysis time and less mobile phase consumption. No interference from any component of pharmaceutical dosage form was observed. Validation studies revealed that the method is specific, rapid, reliable, accurate, robust and reproducible. The methodis amenable to the routine analysis of large numbers of samples with good precision and accuracy. The most striking feature of this method is its simplicity and rapidity, non-requiring-consuming sample preparation such as extraction with solvents, heating, degassing which are needed for HPLC procedure. © 2015, International Journal of Pharmacy and Pharmaceutical Sciences. All rights reserved.


Chandra Sekhar K.B.,JNTUA
International Journal of Pharmacy and Pharmaceutical Sciences | Year: 2012

A sensitive, specific and rapid high-performance liquid chromatography-ultraviolet spectroscopy method was developed and successfully validated to estimate the metformin and repaglinide in rabbit plasma. The solvent extraction method was used for metformin and repaglinide from serum by using ethyl acetate and 0.1N HCl. The mobile phase consists of acetonitrile: phosphate buffer pH 4.0 at 60:40 %v/v with 1% triethylamine at flow rate of 0.8ml/min and at fixed wavelength of 254nm. On ten minutes of run time, metformin was retention at 5.1 and repaglinide for 7.4min. The extraction efficiency was 98% for metformin and 95% for repaglinide. The intra-day and inter-day precision was in the terms of %RSD less than 1.76% for both the compounds. The developed method was validated and proposed method is useful for pharmacokinetics studies.


Reddy G.S.,VNRVJIET | Rajinikanth T.V.,SNIST | Rao A.A.,JNTUA
Souvenir of the 2014 IEEE International Advance Computing Conference, IACC 2014 | Year: 2014

Text clustering is an unsupervised process forming its basis solely on finding the similarity relationship between documents with the output as a set of clusters [14]. In this research, a commonality measure is defined to find commonality between two text files which is used as a similarity measure. The main idea is to apply any existing frequent item finding algorithm such as apriori or fp-tree to the initial set of text files to reduce the dimension of the input text files. A document feature vector is formed for all the documents. Then a vector is formed for all the static text input files. The algorithm outputs a set of clusters from the initial input of text files considered. © 2014 IEEE.


Arulprakasajothi M.,JNTUA | Elangovan K.,Cambridge Institute of Technology | HemaChandra Reddy K.,JNTUA | Suresh S.,National Institute of Technology Tiruchirappalli
Materials Today: Proceedings | Year: 2015

This paper presents the heat transfer study of TiO2/water Nanofluids with different concentrations. Nanofluids have emerged as an exciting new class of nanotechnology based heat transfer fluids and have grown enormously in the past few years. Nanofluids increases the performance of heat exchanging devices than the conventional working fluids. In the present work, TiO2/water nanofluids with various volume concentrations of 0.1%,0.25%,0.5% and0.75% were prepared using two step method for heat transfer study. Stability, thermal conductivity and viscosity measurement was conducted using zeta potential, KD2 Pro and Brookfield Viscometer respectively. Finally, the experiment was conducted using TiO2/water nanofluids as working fluid in a tube heat exchanger to study the heat transfer performance. The experimental results show that the nusselt number increases with an increase of particle volume fraction and the nusselt number enhancement was observed to be 13.2% over the base fluid for volume concentration of 0.75%. From the experimental observations, enhancement in Nusselt number is larger than the enhancement in friction factor. © 2015 Elsevier Ltd.


Reddy G.P.R.,J.N.T.U.A | Kumar M.V.,J.N.T.U.A
7th International Conference on Intelligent Systems and Control, ISCO 2013 | Year: 2013

With the increasing shortage in fossil fuels, and pollution problems renewable energy has become an important energy source. Comparing the all renewable energy sources wind energy is one of the most economical energy sources. In present generating units above 1 MW, variable speed concepts are usually applied that are either based on doubly fed induction generators (DFIG) or Permanent magnet Synchronous generator (PMSG) are mostly used in Wind Energy Conversion Systems (WECS). This paper discusses about the implementation of matrix converter for wind-energy conversion System employing permanent magnet synchronous generator (PMSG). The MATLAB/SIMULINK simulation software are used for simulation. © 2013 IEEE.

Loading JNTUA collaborators
Loading JNTUA collaborators