Title	Photovoltaic Cell Battery Model for Wireless Sensor Networks
Author	JongGyu Kim, John Paul M. Torregoza, InYeup Kong, WonJoo Hwang
Citation	Vol. 6  No. 9  pp. 90-97
Keywords	Battery Model, Photovoltaic Cell, Wireless Sensor Network

Title	Lifetime Maximization by Cross-Layer Design considering Power Control, MAC, Routing in Sensor Networks
Author	In-Yeup Kong, JongGyu Kim, Won-Joo Hwang
Citation	Vol. 6  No. 9  pp. 144-150
Keywords	Cross-layer, Lifetime maximization, Multi-hop communication, Energy-efficiency, Sensor networks.