Scientific Publications
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Research Categories
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Computer Science & Engineering
Core computing paradigms, algorithm design, software architectures, advanced computing theory, and hardware engineering.
Computer Networks
Network architectures, wireless ad-hoc protocols, vehicular networks (VANET), buffering, and communications.
Electronics Department
Circuits, semiconductor devices, flexible electronics, solar array modeling, signal processing, and photonics.
Civil Engg
Structural analysis, thermal stability of fluid layers, environmental infrastructure, and applied materials engineering.
Recent Publications (2)
Modeling of Solar array and Analyze the Current Transient Response of Shunt Switch Voltage Regulator in Spacecraft Power Conditioning Unit
Spacecraft bus voltage is regulated by power conditioning unit using switching shunt voltage regulator having solar array cells as the primary source of power. This source switches between the bus loads and the shunt switch for fine control of spacecraft bus voltage. The effect of solar array cell capacitance [5][6] along with inductance and resistance of the interface wires between solar cells and power conditioning unit[1], generates damped sinusoidal currents superimposed on the short circuit current of solar cell when shunted through switch. The peak current stress on the shunt switch is to be considered in the selection of shunt switch in power conditioning unit. The analysis of current transients of shunt switch in PCU considering actual spacecraft interface wire length by illumination of solar panel (combination of series and parallel solar cells) is difficult with hardware simulation. Software simulation by modeling solar cell is carried out for a single string (one parallel) in Pspice [6]. Since in spacecrafts number of parallels and interface cable length are variable parameters the analysis of current transients of shunt switch is carried out by modeling solar array with the help of solar cell model[6] for the actual spacecraft condition.
Leader Election Approach: A Comparison and Survey
In distributed system, the coordinator is needed to manage the use of the resources in the shared environment. Many algorithms have been proposed for the same. They have various positive and negative parts. Here we will discuss those issues which ensure the efficiency of the algorithm for election leader. Here a comparison will be provided to show the advantages and disadvantages of different election algorithms. The comparison would be based on the number of messages passing and the order of time complexity.