Abstract: Provided is a simulation spectrum apparatus including: a background image acquisition unit that acquires a background image of a target region and an infrared signal corresponding to each pixel of the background image; a spectrum acquisition unit that acquires a background radiation intensity spectrum from the infrared signal acquired for the each pixel; a simulation spectrum generation unit that generates a model of a linear combination of a radiation intensity spectrum of a contamination cloud and a background radiation intensity spectrum on the basis of a difference in radiation intensity; a controller that generates a simulation spectrum of the contamination cloud by applying the information on the at least one toxic substance and the atmosphere transmittance to the model of the linear combination; and an imaging unit that generates a spectrum image, combines the generated spectrum image and the background image, and thus generates a simulation contamination cloud image.

Abstract: A method for displaying a thumbnail group on an idle screen and a mobile communication terminal are disclosed. The mobile communication terminal includes: a storage for storing a communication program; a terminal controller for executing the communication program; a display for displaying the communication program executed by the terminal controller; and an input unit for receiving commands from a user, wherein the terminal controller, through executing the communication program, controls to display a thumbnail group including frequent contacts on a certain portion of an idle screen, and upon receiving an activation command from the input unit, turn the screen to an active mode screen for displaying graphic image information of the frequent contacts, and in response to the input unit selecting a specific contact, display detailed information on the particular member in the contacts.

Abstract: A method for providing communication functions for frequent contacts, and a mobile communication terminal and a presence server for the same are disclosed. The mobile communication terminal includes: a storage for storing a communication program for registering frequent contacts; a display for outputting the communication program; a key input unit for receiving an input of a key or a command; and a controller for executing the communication program to display icons of members registered with the frequent contacts, output a list of contact function icons for a selected member in the frequent contacts, and perform the contact function corresponding to a contact function selection from an updated list of the contact function icons with respect to a selected member, wherein the updated list includes an added or changed contact function that is made in a contact function edit mode.