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  ______    _____    _    _      ___     __   _   
 /_   _//  |  ___|| | |  | ||   / _ \\  | || | || 
 `-| |,-   | ||__   | |/\| ||  / //\ \\ | '--' || 
   | ||    | ||__   |  /\  || |  ___  ||| .--. || 
   |_||    |_____|| |_// \_|| |_||  |_|||_|| |_|| 
   `-`'    `-----`  `-`   `-` `-`   `-` `-`  `-`

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Text this: Minimum-energy connected coverage in wireless sensor networks with omni-directional and directional features