Time filter

Source Type

Lingaraj K.,Rao Bahadur Y Mahabaleswarappa Engineering College | Biradar R.V.,Ballari Institute of Technology and Management | Patil V.C.,Ballari Institute of Technology and Management
Alexandria Engineering Journal | Year: 2017

Agilla is the most common mobile agent middleware to facilitate adaptive applications in WSN. But due to lack of bandwidth and energy level in agilla, it is restricted to local tuples. This article presents eagilla, a middleware to support remote level multicasting wireless sensor networks. Eagilla organizes multicasting communication in different tuples, integrating mobile agents to the network for sensing data and to regulate the data to organize global communication. Eagilla model comes up with a hybrid multi-layered architecture to reduce the complexity and to support interoperability, heterogeneity in WSN. Eagilla provides non-functional requirements such as Qos, scalability, flexibility and reliability. The effectiveness of eagilla middleware is proved by conducting experiments in a professional environment. © 2017 Faculty of Engineering, Alexandria University.

Ujjinimatad R.,Ballari Institute of Technology and Management
2013 Annual International Conference on Emerging Research Areas, AICERA 2013 and 2013 International Conference on Microelectronics, Communications and Renewable Energy, ICMiCR 2013 - Proceedings | Year: 2013

In this paper, we consider the sensing methods based on the known noise level in cognitive radio (CR) networks under multi antenna systems and compare with the unknown noise level detection methods. The analysis is focused on energy detection (ED) and maximum eigenvalue based methods that require the knowledge of noise level. Threshold and detection performance of the maximum eigenvalue based method are expressed by closed analytical formulas. Random matrix theory is used to derive the expressions for threshold and probability of detection. The performance comparison of different sensing methods is provided through simulation analysis. Simulation results provide performance of various sensing methods for wireless microphone signals and independent and identically distributed (iid) signals. © 2013 IEEE.

Ujjinimatad R.,Ballari Institute of Technology and Management
IET Communications | Year: 2013

In this study, the authors consider the problem of signal detection in cognitive radio under the cases of known and unknown noise levels. The analysis is focused on maximum eigenvalue-based method which requires the knowledge of noise variance and the ratio of maximum eigenvalue to the trace of covariance matrix. The analytical formulas are derived for threshold calculation and probability of detection for the considered methods. Performance of the considered methods is measured through simulation analysis. The performance comparison between the considered methods and other existing methods is provided. Simulations based on independent and identically distributed signals and wireless microphone signals are presented to verify the various sensing methods. © The Institution of Engineering and Technology 2013.

Reddy S.,Ballari Institute of Technology and Management | Basavaraja B.,UBDTCE
Proceedings of the 2015 IEEE International Conference on Power and Advanced Control Engineering, ICPACE 2015 | Year: 2015

A Pulse Width Modulation (PWM) Voltage Source Inverter (VSI) fed induction motor drive has superior dynamic characteristics than sine wave driven induction motor. But it has a problem with induced bearing voltage and high frequency bearing current that flows through bearings due to parasitic capacitive coupling that results in premature bearing failure. In many industrial applications the PWM inverters and motors must be at separate locations thus requiring long motor cable, which contributes over voltage and higher common mode voltage at the motor terminal due to voltage reflection phenomenon. Higher common mode voltage results in higher induced shaft voltage and bearing currents. This paper presents simulation and analysis of influence of motor cable length on the magnitude of common mode voltage, bearing voltage and bearing current in two level and three level diode clamped multilevel inverter fed induction motor drive. The dv/dt of common mode voltage and bearing voltage also presented. Simulation is carried out using MATLAB/simulink. © 2015 IEEE.

Thomas H.M.W.,Ballari Institute of Technology and Management | Kumar S.C.P.,Rashtreeya Vidyalaya College of Engineering
Proceedings of the 2015 International Conference on Applied and Theoretical Computing and Communication Technology, iCATccT 2015 | Year: 2015

FPGA knowledge has become object for the realization of real time algorithms appropriate for image processing applications. MATLAB GUI allow designer to unlock the picture to be processed, setup the message parameters, identify the essential processing, drive the input picture, and obtain the related outcome after the method. This could be processed in real time. We can implement existing system for simplified computation method on a MRI image for tumor detection is detailed above using morphological filtering on a binary image which is extracted from the input image & also we can implement for the work carried out for the detection of desired interest based on morphological operation and segmentation algorithm is developed The algorithm is been tried on a amount of diverse images from various angles and the output results were almost desired. © 2015 IEEE.

Roy A.S.,Gulbarga University | Anilkumar K.R.,Materials Research Laboratory | Machappa T.,Ballari Institute of Technology and Management | Ambika Prasad M.V.N.,Gulbarga University
Sensor Letters | Year: 2011

The Cadmium oxide doped nanocrystalline polyaniline (CdO/PANI) composite was prepared with various weight percentages of CdO by in situ polymerization method using aniline, ammonium persulfate and CdO as starting materials. The CdO/PANI composite was characterized by X-ray diffractometer and FTIR techniques. The SEM micrograph of the pure polyaniline shows irregular shaped granules of size ranging from 60-80 nm and that of CdO/PANI composites show granules of 0.60-0.65 μm in size. The temperature dependent conductivity measurement shows the thermally activated exponential behavior of CdO/PANI composites. The selectivity is found to be maximum for LPG and moderate for CO 2 and ethanol. It is also seen that around 400 PPM v concentration of LPG, sensitivity is 75% for 50 wt% of CdO/PANI composites. Copyright © 2011 American Scientific Publishers All rights reserved.

Ujjinimatad R.,Ballari Institute of Technology and Management
2012 International Conference on Wireless Communications, Networking and Mobile Computing, WiCOM 2012 | Year: 2012

Signal detection is a fundamental problem in cognitive radio. Energy detection is optimal for detecting independent and identically distributed (iid) signals, but not optimal for detecting the correlated signals. This paper introduces a unified framework for the signal detection where the noise variance and the channel between the source and sensor are unknown at the receiver. The statistical tests are proposed based on the sample covariance matrix calculated from the received signal samples. Using the recent results from random matrix theory, a practical way to evaluate the threshold for the tests is provided. Statistical tests do not need any information of the signal, the channel and noise power as a priori. The Performance of the statistical tests are compared with energy detection (ED) algorithm and covariance absolute value (CAV) method through simulation analysis. Simulations based on voice recorded signals are presented to verify the proposed statistical tests. © 2012 IEEE.

Khened B.S.,Ballari Institute of Technology and Management | Machappa T.,Ballari Institute of Technology and Management | Pradeep M.V.N.,Manipal University India | Ambika Prasad M.V.N.,Gulbarga University | Sasikala M.,Godu Tai Engineering college for Women
Materials Today: Proceedings | Year: 2016

Polyaniline (PANI) / Barium zirconate (BaZrO3) composites were prepared by insitu polymerization with 10, 20, 30, 40, 50 wt% of BaZrO3 in polyaniline and characterized by FTIR spectra, X-ray diffraction and scanning electron microscopy. Thermally activated behaviour was seen in D.C. conductivity measurements, where increase in conductivity with increase in temperature was observed. Maximum conductivity was seen in 40 wt% of BaZrO3 in polyaniline. A.C. conductivity studies reveal increase in conductivity of all the composites with increase in frequency. On exposure to LPG gas, variation in resistance of the composites was observed. © 2016 Elsevier Ltd.

Khened B.S.,Ballari Institute of Technology and Management | Ambika Prasad M.V.N.,Gulbarga University | Sasikala M.,Godu Tai Engineering College for Women
Sensor Letters | Year: 2016

Polyaniline/ZnFe2O4 nanocomposites are synthesized by insitu polymerization using surfactant and gas sensing properties of these nanocomposites are studied. The nanocomposite formation is confirmed by the prominent peaks of benzenoid, quinoid and oxides in FTIR spectra. SEM shows growth of polymer in two dimensions and homogeneous distribution of ZnFe2O4 nanoribbons in the matrix. With increase in temperature as well as with addition of ZnFe2O4 ribbons in the polymer matrix, the conductivity is found to increase. Sensor device on glass substrate is fabricated using nanocomposites and in this indigenous sensor two probe method is employed for gas sensing studies. Nanocomposite of 30 wt% shows sensitivity of about 86%, with response and recovery times of 403 sec and 312 sec respectively. These nanocomposites are found to be highly stable from the studies of reproducibility and stability. Selectivity studies show that these composites are highly sensitive for LPG among different gases. Copyright © 2016 American Scientific Publishers All rights reserved.

Anupama S.,Ballari Institute of Technology and Management | Pradeep N.V.,Ballari Institute of Technology and Management | Hampannavar U.S.,Guru Nanak Institutions
Sugar Tech | Year: 2013

Distillery spent wash is the unwanted residual liquid waste generated during alcohol production and pollution caused by it is one of the most critical environmental issue. Distillery spent wash is one of the recalcitrant wastes having extremely high Chemical Oxygen Demand (COD), Biochemical Oxygen Demand (BOD), Suspended Solids (SS), inorganic solids, color and low in pH. Wastewater collection, storage, treatment and management are of prime importance towards environmental pollution prevention and control. In this concern, Microbial Fuel Cell (MFC) and Rotating Biological Contactor (RBC) were fabricated and further used to treat distillery spent wash. The present study was carried out at ambient environmental conditions. Different feed concentrations of 1,100 mg COD/L to 10,100 mg COD/L was fed to MFC which treated spent wash anaerobically. As the feed concentration increased the percentage reduction of COD, BOD and Dissolved Solids (DS) increased initially up to 6,100 mg COD/L and further reduction in the removal efficiencies were observed. The highest percentage of COD, BOD and DS removal were 64, 61. 2 and 44. 8 % respectively at 6,100 mg COD/L and was considered as optimal effluent. The average current (0. 27 mA) and power density (18. 35 mW/m2) values also proved to be higher at the feed concentration of 6,100 mg/L COD. This optimal effluent was treated further aerobically in RBC and obtained 84 % COD, 81 % BOD and 46. 4 % DS removal. Hence MFC and RBC can be adopted to treat spent wash in an effective manner. © 2013 Society for Sugar Research & Promotion.

Loading Ballari Institute of Technology and Management collaborators
Loading Ballari Institute of Technology and Management collaborators