Abstract: An X-ray imaging apparatus includes an imaging device configured to capture a camera image of a target; a controller configured to stitch a plurality of X-ray images of respective divided regions of the target to generate one X-ray image of the target; and a display configured to display a settings window that provides a GUI for receiving a setting of an X-ray irradiation condition for the respective divided regions, and display the camera image in which positions of the respective divided regions are displayed.

Abstract: A method of scheduling a CPU in which a clock of the CPU is controlled depending upon the states of processes to reduce power consumption. The clock is controlled by substituting clock functions of an embedded system into a scheduler function, comparting a wait time until a scheduling is completed with the sum of an execution time given for satisfying a real-time condition and an error range of a permissible error of a scheduling, changing a clock state of a process depending on the compared result, calculating an elapsed time with respect to a difference between the changed scheduling clock and a scheduling clock before the change of clock to control the wait time Wk and setting the clock of the CPU using the value of a newly determined clock.

Abstract: A method of scheduling a CPU in which a clock of the CPU is controlled depending upon the states of processes to reduce power consumption. The clock is controlled by substituting clock functions of an embedded system into a scheduler function, competing a wait time until a scheduling is completed with the sum of an execution time given for satisfying a real-time condition and an error range of a permissible error of a scheduling changing a clock state of a process depending on the compared result, calculating an elapsed time with respect to a difference between the changed scheduling clock and a scheduling clock before the change of clock to control the wait time Wk and setting the clock of the CPU using the value of a newly determined clock.