Abstract: A blade sharpener for grinding a kitchen knife, etc. in which two separate rotary shafts are provided in parallel, at least one whetstone is mounted on each one of the rotary shafts, the circumferential surface of the whetstone forms a grinding surface, the whetstone on one rotary shaft and the whetstone on the other rotary shaft are positionally shifted in the axial direction of the rotary shafts, and the cutting edge of the blade of kitchen knife is ground by moving the blade in the axial direction of the rotary shafts while applying the cutting edge to the grinding surfaces of the whetstones.

Abstract: In a disk array system composed of a disk controller connected to a host system and a maintenance terminal and a disk array connected to the disk controller via a disk channel, when failure occurs in a drive in the disk array, the disk controller writes data stored in a plurality of disk drives on a faulty board on which a faulty drive is mounted into substitution disk drives and informs the maintenance terminal that the faulty board is replaceable after the reorganization of logical groups is completed.

Abstract: The object of the present invention is to provide multi-channel reproducing apparatuses and multi-channel reproducing loudspeaker apparatuses that can be easily connected to one another. In the multi-channel reproducing apparatus 1, a DSP 6 converts an inputted audio signal to audio signals for a plurality of channels, adds channel identification information to each audio signal and multiplexes the audio signals to generate a multi-channel reproducing signal. The DSP 6 supplies the multi-channel reproducing signal to a plurality of multi-channel reproducing loudspeaker apparatuses 201 to 20n that are dispersedly arranged. These multi-channel reproducing loudspeaker apparatuses 201 to b 0n input the multi-channel reproducing signal from an input terminal 20a and output the signal to outside from an output terminal 20b.

Abstract: A disk storage system has high throughput between a disk adapter of a disk controller and a disk array. The disk adapter of the disk controller is connected to the disk array through switches. Data on a channel between the switch and a RAID group is multiplexed in the switch to be transferred onto a channel between the switch and the disk adapter and data on the channel between the switch and the disk adapter is demultiplexed in the switch to be transferred onto the channel between the switch and the RAID group. A data transfer rate on the channel between the disk adapter and the switch is made higher than that on the channel.

Abstract: A processor or a semiconductor integrated circuit which prevents a malfunction caused by noise on power supply nets. A noise detecting circuit which detects noise on power supply nets to a circuit block is arranged in each of a plurality of circuit blocks which performs signal processing, and which performs interruption for preventing a malfunction to the circuit block itself or other circuit blocks relating to this signal processing by a detection signal of each noise detecting circuit.

Abstract: So as to provide a network service that allows a specific service to be provided and received safely for both the user and service provider, a service provider providing a user identification file that is installed in a client computer used by a user whose user eligibility is confirmed in advance. Upon request for access from the client computer, the service provider checks for the presence of a user identification file residing in the client computer in the browser screen and provides a specific service only for access requests from the client computer confirmed to have user identification files. User identification files have no effects on pre-installed programs of the client computer when they are installed and are equipped with computer identification symbols whose presence can be checked in the browser screen.

Abstract: A condenser having a huge area is required to reduce a noise on LSI power supply nets (−&Dgr;VDD) of an integrated circuit because a bypass condenser can only utilize a part of accumulated electric charges. A noise of LSI power supply nets is suppressed by generating a noise of a reversed polarity (+&Dgr;VDD) to the noise on the LSI power supply nets (−&Dgr;VDD), based upon a noise reducing circuit discharging a condenser charged with a high voltage. A noise reduction effect equivalent to a bypass condenser having a large capacity is obtained even when a condenser having a small capacity is used.

Abstract: An electromagnetic pressure regulating valve includes a hollow core, a coil surrounding the core and a plunger for applying a load to a valve member through a shaft fitted in the hollow of the core, so that the pressure regulating valve is actuated when an electric signal is fed to the coil. A bushing is mounted in the hollow portion of the core for supporting the shaft for sliding relative to the core and is made of a resin material on at least its sliding face contacting the shaft. An oil passage is provided in the valve for circulating a lubricant to lubricate the areas of sliding contact between the bushing and the shaft.

Abstract: A semiconductor package includes a semiconductor chip, an interconnection substrate having the semiconductor chip mounted on one surface of the interconnection substrate, and a package base having the interconnection substrate mounted on one surface of the package base. An optical transmission medium is provided on the package base at a location corresponding to an optical device provided on the interconnection substrate. On the other surface of the package base is provided a receptacle for making an optical connection between an optical fiber cable and the optical transmission medium. Signals are input and/or output via the optical fiber cable connected to the receptacle.

Abstract: A pressure control valve has a valve sleeve, a spool valve mounted for sliding in the valve sleeve in response to a load by an electromagnet, a spring load, and an output pressure feedback load, and the electromagnet portion capable of moving the spool valve. The spool valve has an oil passage capable of feeding back the output pressure, the feedback oil passage being formed diagonally in the land portion. A periphery of an end surface of the land portion, or the same of the supply port, output port, or the exhaust port of the sleeve is provided with a cutout. Output pressure generated at the output port is transmitted through the feedback oil passage, thereby damping and stabilizing the operation of the spool valve. Since the cutout is formed as described above, a rapid pressure change due to the movement of the spool valve can be eliminated, preventing generation of buzz.

Abstract: A pressure control valve including an electromagnet portion, a pressure governing valve portion coupled to the electromagnet portion and hydraulic oil enclosed in said electromagnet portion. The pressure governing valve portion includes a valve sleeve and a spool valve slidably mounted in the valve sleeve so that an output pressure corresponding to an input signal to the electromagnet portion is provided. The electromagnet portion includes a push rod which slides in tandem with the spool valve, a core surrounding the push rod, a coil assembly disposed on the outer surface of the core, and a plunger secured to the push rod so that the spool valve slides responsive to the input signal. An oil passage is provided between the core and the coil assembly as that movable portions of the electromagnet portion move without any resistance from the hydraulic oil.