Abstract: A dual format hybrid storage medium includes a non-recordable section in which data to be reproduced is written and in which data cannot be updated, and a recordable section in which data in the non-recordable section having a high probability of error occurrence may be backed up. The high probability of error is determined based on a range of fluctuation of an RF envelope, an unstable phase locked loop signal, a value of a sum level or sub-beam added level of the reproduced data, an unstable focus lock signal, a range of fluctuation of a track error signal and a range of fluctuation of a focus error signal. A determination is made to test for errors if a freeze-frame is found, audio and video are out of sync, a data seek fails or a picture distortion or a picture mosaic effect occurs.

Abstract: An apparatus and method determining an optimum recording power suitable for a disc loaded in a disc drive. The apparatus includes a pickup unit and a control unit. The pickup unit records data in a predetermined area on the disc and reproduces the recorded data from the disc. The control unit controls the disc drive to record data in the predetermined area of the disc using a preset reference recording power. The control unit detects a plurality of recording powers using reproduction signals of the predetermined area reproduced from the pickup unit and one or more reference values, and decides an optimum recording power for the disc based on the detected plurality of recording powers. Thus, the recording power used by an active layer of the disc can be prevented from varying due to hardware error in the disc drive with respect to various kinds of discs.

Abstract: A disc which insures a normal performance of an optical disc driver (ODD) and a method of manufacturing the same by accounting for disc defects. A reflectivity of the disc is within a range of 45-70% and a birefringence of the disc is within a range of 100-150 nm. Since the acquisition and manufacture of marginal discs which account for defect factors are possible, the influence of the defect factors can be continuously limited. Thus, a predetermined quality of discs can be used in the ODD.

Abstract: A sanitized footwear in which an ozone generating apparatus is provided so as to suppress the propagation of bacteria, to thereby prevent and cure athlete's foot, and the footwear has at the inner part of a heel thereof a metal or a resin casing having a piezo ceramic element and a driving lever at a pin shaft of the casing. The driving lever is coupled with a driving plate, a spark electrode with electricity applied thereto is generates sparks by a piezo effect into the footwear when the piezo ceramic element is compressed by pressing power of a wearer when the wearer walks, thereby generating ozone in the footwear.

Abstract: A device for increasing the hardness and intensity of wood which comprises chuck means for holding the wood in a fixed position for processing, a compression-shaped forming die for compressing the wood being processed, an ultrasonic wave-generating device operatively connected with the compression-shaped forming die for applying sound waves to the wood, a forming mold positioned downstream of said compression-shaped forming die for receiving wood therefrom, said forming mold further compressing said wood to remove a portion of the water contained therein, and means for advancing the chuck means containing the wood being processed through the compression-shaped forming die, the ultrasonic wave-generating device and the forming mold.

Abstract: The present invention provides a circuit for correcting a horizontal state of a disk transferring device including chucks for clamping a selected disk from a cartridge, a chuck transferring body for transferring the chucks right or left, a lower frame combined with the chucks and the chuck transferring body to move them left or right, and first and second frames formed integrally with the chucks, the chuck transferring body and lower frame and fixedly connected to belts to move the chucks, chucks transferring body and lower frame up and down by the belts.

Abstract: A method and apparatus is provided whereby several operations are simultaneously performed when transferring an object to a desired destination by controlling the output of a microcomputer using an elevator system. The method includes the steps of: vertically transferring a vertical transfer device to a predetermined position of the object according to a predetermined first control signal output from the microcomputer; starting to horizontally transfer a horizontal transfer device to the position of the object according to a predetermined second control signal output from the microcomputer and completing the operation of the horizontal transfer device according to a first external control signal; and starting to insert or withdraw the object into or from the destination according to a third control signal output from the microcomputer and completing the operation for inserting or withdrawing the object into or from the destination according to a second external control signal.