SangCheol Lee

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In relatively small allowable volume fuel cells are unable to provide the average power and essentially high peak power demanded by specific electric load. Hybrid-type direct methanol fuel cell (DMFC) systems composed of fuel cells and secondary batteries could combine the high power density of clean fuel cells and the high energy density of convenient(More)
The handover delay time spent in the service connections running at a Mobile Station (MS) in IEEE 802.16e systems can have a negative impact on real-time applications; especially, a connection for Multicast and Broadcast Service (MBS) could suffer additional handover delays due to multicast session update (the process of updating its associated MBS zone),(More)
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