Abstract: A user interface method in a multimedia playing device having a touch screen is provided. The user interface method includes displaying, while playing a multimedia file, at least one sound source object in a first area of the touch screen, identifying, if an input event is generated for the sound source object, a type of the input event, changing a form of the displayed sound source object according to the type of the input event, and controlling the play of the multimedia file. Accordingly, while playing a multimedia file, an attribute of a playing multimedia file is displayed in a touch screen of a multimedia playing device, and the attribute of the playing multimedia file may easily be changed by touching and dragging the touch screen.

Abstract: An exercise assistant system and method for managing an exercise pattern in conjunction with music is provided. The exercise assistant system builds a reference exercise schedule on the basis of user information; designates at least one music file for the reference exercise schedule; stores the reference exercise schedule and the music file; outputs guidance information and the music file in sound on the basis of the reference exercise schedule; displays a reference exercise pattern and an actual exercise pattern in a form of graph; and resets the reference exercise schedule and the music file on the basis of a biological change of the user during exercise. The exercise assistant system and method enables adjustment of the exercise amount and level according to the user's exercise achievement and physical variation during the exercise, such that it is possible to effectively assist the user's exercise.

Abstract: Disclosed is a delivery management system and method using a smart communicator. The delivery management system includes a selling server for selling articles online; a delivery server for managing delivery of articles sold by the selling server; a mailbox which reads information from an information storage attached to an arrived article at a destination under the control of the delivery server; and a home network server which stores ordered article information, determines whether the arrived article is correctly delivered on the basis of a comparison between the ordered article information and the arrived article information read from the information storage, transmits the result of the comparison to a smart communicator, controls follow-up management of the delivery according to a remote control of the smart communicator. Accordingly, it is possible to check the arrival of an article and control follow-up management on the articles delivered correctly or incorrectly using the smart communicator.