Abstract: An optical disc device includes an optical head section and a regularity monitoring circuit. The optical head section generates a wobble signal indicating wobbling of a track formed on a recording surface of an optical disc medium based on a reflected light reflected by the optical disc medium. The regularity monitoring circuit judges an existence or absence of a defect on the optical disc medium based on a difference between the wobble signal and a signal indicating the wobble under a normal condition.

Abstract: An optical disc device includes an optical head section and a regularity monitoring circuit. The optical head section generates a wobble signal indicating wobbling of a track formed on a recording surface of an optical disc medium based on a reflected light reflected by the optical disc medium. The regularity monitoring circuit judges an existence or absence of a defect on the optical disc medium based on a difference between the wobble signal and a signal indicating the wobble under a normal condition.

Abstract: An object of the present invention is to acquire information regarding the cardiac valve required in the clinical field, such as the tenting volume, tenting area, tenting height of the mitral valve of the heart, the area, the circumferential length, and height (the difference between the highest portion and the lowest portion) of the mitral annulus, etc.

Abstract: An initial program loading system in an information processing system containing a central processing unit and at least one peripheral apparatus connected to the central processing unit. The system transfers program data from the peripheral apparatus to the central processing unit. The system then loads the program data in the central processing unit, responding to an IPL request which is input into said initial program loading system. Each peripheral apparatus has a unit for sending a notification to the central processing unit that the peripheral apparatus is ready to transfer the program data to the central processing unit. After the central processing unit receives the notification, the transfer of the program data is carried out. The IPL request may be received in the central processing unit, or each peripheral apparatus. An IPL controller may be provided in the system.

Abstract: In a system where a central control unit, a main memory unit and a channel control unit are connected to a multi-bus, input/output control units are connected in series through the channel control unit and a common bus and each input/output unit, such as a printer or magnetic tape unit, is connected to each input/output control unit. The channel control unit includes a pseudo-input/output control unit which can simulate the operation of an input/output control unit. This pseudo-input/output control unit is the input/output control unit only for diagnosis of the common bus interface of the channel control. This pseudo-input/output control unit also transfers data in the program mode/direct memory access mode based on a command sent from the channel control unit and communicates the current situation or status to an central control unit through the interrupt sequence after the end of data transfer in the direct memory access mode.