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Cloud computing is one of the best emerging parameter in IT industry which provides on demand services. It uses Central remote server and internet for maintaining data and applications. Users can access their files and applications through internet access. As it is publically available so data security must be required. In this paper, we have analyzed different security and application aspects of...
This paper highlights the importance of energy harvesting in high-value asset monitoring applications involving use of active RFID tags. The paper begins by highlighting advantages of active tags including improved range and read rate in electromagnetically unfriendly environments. Although a battery can substantially improve performance, it limits maintenance-free operational life. Therefore, harvesting...
This paper focuses on effective system modeling and implementation of a dc-dc buck converter with a digital controller. Two methods are systematically followed to design a two pole, two zero proportional-integral-derivative (PID) controller. Method one uses a traditional design by emulation, where compensator poles and zeroes are chosen based on the uncompensated loop response to yield sufficient...
Pervasive human monitoring of various biological parameters is a growing field of interest. The focus of this research is to provide a step forward towards pervasive health monitoring. We describe a system to remotely monitor data from a patient's electrocardiogram (ECG). The data is transferred to a central monitoring station via a wireless sensor network for display. Crossbow MICAz motes are used...
A system to remotely monitor a patientpsilas oxygen saturation (%SpO2) levels is described. The data was continuously measured using a pulse oximeter and then transferred to a central monitoring station via a wireless sensor network for storage and display. Crossbow MICAz motes were programmed to serve as the network nodes. One mote was interfaced to the pulse oximeter for data acquisition and the...
A method has been developed to measure the voltages of individual batteries used in hybrid electric vehicle (HEV) battery packs using a new selective battery measurement system. This system consists of a voltage measurement circuit that measures battery voltages using a set of electromechanical relays connected in a matrix formation. A sixteen-bit microcontroller was used for controlling the operation...
A comparative study of shrinking span membership function (SSMF) fuzzy logic controller (FLC) relative to conventional FLCs has been presented in this work. The fuzzy logic controller provides a means of converting a linguistic control strategy based on expert knowledge into an automatic control strategy. The SSMFs have different spans for various term set elements in the universe of discourse. This...
A special round robin (RR) algorithm has been developed to equalize nickel metal hydride (NiMH) battery packs using a new selective equalizer. This algorithm detects batteries either at a very low state of charge (SOC) or at an extremely high SOC. In this system, a set of electromechanical relays are connected in a matrix to route boost current to the weaker batteries. The relay switching is controlled...
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