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Karachi, Pakistan

Jha A.,Indus University | Adlakha N.,Sardar Vallabhbhai National Institute of Technology, Surat
2013 Nirma University International Conference on Engineering, NUiCONE 2013 | Year: 2013

The study of calcium diffusion in neuron cells has gained interest among researchers during the last two decades, due to its wide variety of roles in human body like muscles contraction, secretion, metabolism, signal transduction etc. Most of the theoretical investigations on calcium diffusion in neurons have been carried out for one and two dimensional cases by various research workers and that too by incorporating a point source of influx. In order to have more realistic study a three dimensional model of calcium diffusion in a cylindrical shaped neuron cells has been developed in this paper. Apart from the point source, the line and surface sources of an influx of Ca2+ have been incorporated in the model. Appropriate boundary conditions have been framed. The region is discretized using three dimensional circular sectored elements. Variational finite element method has been employed to obtain the solution. The numerical results have been used to study effect of point source, line source and surface source of an influx on Ca2+ distribution in neuron cell. © 2013 IEEE. Source


Bhat S.,Canara Engineering College | Nagaraja H.N.,Indus University
2015 IEEE International Conference on Signal Processing, Informatics, Communication and Energy Systems, SPICES 2015 | Year: 2015

In conventional buck-boost converters, the output voltage is inverted. Hardware circuitry or microcontrollers are used to trigger a switch in the converter. In the proposed study, a non inverting buck-boost converter is implemented for PV system. The Pulse width modulation (PWM) signals for two MOSFETS in the converter are generated by DSP TMS 320 2808. Depending on the solar panel input, buck-boost converter charges the battery. The DC loads are driven from the battery. The load voltage and load current are sensed and compared with the reference voltage. Hardware circuitry or microcontroller is less accurate and using these systems the solar energy cannot be efficiently converted into electrical energy. In industry and commercial applications Digital Signal Processor (DSP) is used for automation. The same DSP can be used to generate PWM signals so as to get maximum electrical energy from solar energy. The DSP is more accurate and this works in real-time scenarios. The efficient utilization of resources such as DSP is achieved in the proposed study as the same DSP is used for generating PWM signal. In the proposed study, PWM signals are generated from DSP depending on load voltage and load current. The proposed work is better as compared to existing systems in terms of line and load regulation, efficiency, accuracy and speed as validated by experimental results. © 2015 IEEE. Source


Ahmed Z.,Indus University | Hamma S.,CNRS Research Institute of Communication and Cybernetics of Nantes
International Conference on Wireless Networks and Mobile Communications, WINCOM 2015 | Year: 2015

Two Level Scheduling Algorithm (TLSA) is a QoS-enabled fair and efficient connection admission control and packet scheduling algorithm for WiMAX networks. At the first level, an inter-class scheduling algorithm distributes bandwidth among various WiMAX service classes. Then at the second level, class specific algorithms distribute bandwidth among connections of the associated class. The present paper focuses on a Markov chain based analytical model of TLSA that is comprehensive enough to depict the behavior of inter-class and intra-class scheduling algorithms. Extensive simulations were performed and several criteria were considered to assess the accuracy of the proposed model. We considered bandwidth allocation in both inter-class and intra-class scheduling algorithms, percentage of lost packets and the service ratio. The experiments indicate that the analytical model faithfully captures the behavior of TLSA. © 2015 IEEE. Source


Patel B.,MATS University | Kaurase K.P.,MATS University | Bisen A.M.,Indus University
Materials Science Forum | Year: 2015

Design of Turbo machinery is complex and efficiency is directly related to material performance, material selection is of prime importance. Temperature limitations are the most crucial limiting factors to gas turbine efficiencies. This paper presents the life of GTD 111 applied to gas turbine blade based on LCF and TMF test results. The LCF tests were conducted under various strain ranges based on gas turbine operating conditions. In addition, IP (in-phase) and OP (out of phase) TMF tests were conducted under various strain ranges. The paper will focus light on above issues and each plays an important role within the Gas Turbine Material literature and ultimately influences on planning and development practices. It is expected that this comprehensive contribution will be very beneficial to everyone involved or interested in Gas Turbines. © (2015) Trans Tech Publications, Switzerland. Source


Bhat S.,Canara Engineering College | Nagaraja H.N.,Indus University
2014 IEEE International Conference on Computational Intelligence and Computing Research, IEEE ICCIC 2014 | Year: 2014

In Photo-Voltaic (PV) systems to increase the conversion efficiency, efficient converters and efficient PWM switching circuits are required. To design efficient converters and PWM switching circuits mathematical models are necessary. In the proposed study, the mathematical model for photovoltaic cell and for buck-boost converter is developed. In the mathematical model, the parasitic elements of switch, inductor, diode and capacitance are considered. The mathematical model for PWM generator is also developed. The models are developed using volt-sec and ampere-sec equations. The mathematical models developed are validated by experimental results. © 2014 IEEE. Source

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