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

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發送短信 : Data Management in Location-Dependent Information Services: Challenges and Issues