Abstract: A fan control apparatus is provided for the computer equipment including a fan, a temperature sensor, and a device module (e.g. an add-in card) mounting at least two devices aligned along an air flow. The fan control apparatus determines a revolving speed of the fan for cooling each device based on an inlet temperature and a usage rate of each device. In addition, the fan control apparatus estimates an inlet temperature of a second device, which is disposed in the downstream side of a first device among at least two devices, based on an inlet temperature and a usage rate of the first device. Thus, it is possible to control the fan to cause an adequate amount of cooling air for cooling devices mounted on the device module installed in the computer equipment.

Abstract: A fan control apparatus is provided for the computer equipment including a fan, a temperature sensor, and a device module (e.g. an add-in card) mounting at least two devices aligned along an air flow. The fan control apparatus determines a revolving speed of the fan for cooling each device based on an inlet temperature and a usage rate of each device. In addition, the fan control apparatus estimates an inlet temperature of a second device, which is disposed in the downstream side of a first device among at least two devices, based on an inlet temperature and a usage rate of the first device. Thus, it is possible to control the fan to cause an adequate amount of cooling air for cooling devices mounted on the device module installed in the computer equipment.

Abstract: Disclosed is a cooling device which can perform cooling with suppressed power consumption and noise even when temperature sensor is in failure without increasing cost. The cooling device includes a temperature estimation unit which, if a failure is detected in at least one of heat source temperature sensors (HSTSs) measuring temperature of the heat sources (HSs), estimates a value to have been measured by the failed HSTS based on measured values by the HSTSs not in failure, a measured value by an exhaust temperature sensor measuring an exhaust temperature which is temperature of an air outlet for discharging heat generated by HSs from a housing containing the HSs, and information representing a temperature distribution characteristic within the housing; and a rotational frequency calculation unit which calculates a rotational frequency of a cooling fan which rotates based on the estimated value and the measured values by the HSTSs not in failure.

Abstract: Disclosed is a cooling device which can perform cooling with suppressed power consumption and noise even when temperature sensor is in failure without increasing cost. The cooling device includes a temperature estimation unit which, if a failure is detected in at least one of heat source temperature sensors (HSTSs) measuring temperature of the heat sources (HSs), estimates a value to have been measured by the failed HSTS based on measured values by the HSTSs not in failure, a measured value by an exhaust temperature sensor measuring an exhaust temperature which is temperature of an air outlet for discharging heat generated by HSs from a housing containing the HSs, and information representing a temperature distribution characteristic within the housing; and a rotational frequency calculation unit which calculates a rotational frequency of a cooling fan which rotates based on the estimated value and the measured values by the HSTSs not in failure.

Abstract: A computer system of the present invention includes cells each of which includes a CPU and a memory, and partitions each of which is configured by combining any number of the cells. A service processor and a control element which controls reading and writing data for memory dumping are provided with the computer system. The cells includes a spare cell which does not belong to any of the partitions. If any of the partitions shuts down because of a system crash, the service processor disconnects the cell in the partition in which the system crash has occurred from the partition with memory information contained in the memory in the cell being held, and sets the spare cell into the partition. After the partition is booted, the control element writes the memory information contained in the memory in the disconnected cell onto the recording medium.

Abstract: A gas decomposition apparatus including at least a set of a high-voltage electrode and a ground electrode, an electric power supply for applying a voltage between the high-voltage electrode and the ground electrode to induce a plasma discharge therebetween, a dielectric substance, and a plasma processing unit. The dielectric substance is disposed between the high-voltage electrode and the ground electrode, and is capable of allowing a gas to be decomposed to flow therethrough. The high-voltage electrode, the ground electrode, and the dielectric substance are disposed in the plasma processing unit. At least one of the high-voltage electrode and the ground electrode is composed of an elastic conductive material and is capable of matching a surface profile of the dielectric substance.

Abstract: The present invention provides a gas treatment apparatus having a plasma reactor. The plasma reactor includes plural linear ground electrodes, plural linear high-voltage electrodes, and an inorganic dielectric layer having a porous structure. The plural linear ground electrodes are disposed on a first plane in parallel to one another. The plural linear high-voltage electrodes are disposed in parallel to one another on a second plane that is parallel with the first plane. The porous inorganic dielectric layer having the porous structure is provided between the plural linear high-voltage electrodes and the plural linear ground electrodes. At least one of a set of the plural linear ground electrodes and a set of the plural linear high-voltage electrodes is entirely covered with an inorganic dielectric.

Abstract: A thin film magnetic head for a magnetic tape drive to correctly read out, even if off-track, the high density magnetic patterns recorded on magnetic tape without picking up noise from adjacent tracks. A thin film magnetic head is comprised of a first composite thin film magnetic head having a read element and write element with complementary parallel read gaps and write gaps to read and write information on a first track of a magnetic tape, and a second composite thin film magnetic head having a read element and write element with a complementary parallel read gap and a write gap to read and write information on a second track adjacent to a first track, and the read gap and the write gap of the first magnetic head form a right angle relative to the drive direction of the magnetic tape, and the read gap and the write gap of the second magnetic head form an oblique (&thgr;) angle relative to the drive direction of the magnetic tape.

Abstract: A method of cleaning a component or a unit of an image forming apparatus which has been contaminated by a toner used for image forming includes the steps of blasting a target surface of the component or unit which has been contaminated by the toner with dry ice, and supplying a detergent to the target surface when the target surface is blasted with dry ice. In addition, a type or concentration of the detergent is adjusted in accordance with a type of the toner used for image forming.

Abstract: The present invention provides a cleaning method in accordance with a degree of soiling and a type of contaminant on a surface to be cleaned of a cleaning target. In the method of cleaning a cleaning target, such as an electrical component, with dry ice, during a process of blasting the dry ice toward the surface to be cleaned from a location where the dry ice is stored, a size of the dry ice is adjusted, so cleaning is performed while a cleaning performance of the dry ice is changed in accordance with the type of soiling or contaminant on the surface to be cleaned.

Abstract: In cleaning operation using dry ice pellets, a bridging phenomenon of the dry ice pellets occurs. Also, static electricity is generated, so a good cleaning effect cannot be obtained. This invention is directed to solve these problems. In order to solve these problems, a cleaning apparatus has a blast nozzle, a device for pneumatically feeding a carrier gas to the blast nozzle, and a device for supplying dry ice pellets to the blast nozzle, and blasts a cleaning object (W) with the dry ice pellets, together with the carrier gas, from the blast nozzle, thereby cleaning a surface of the cleaning object (W). This cleaning apparatus includes an air supplying device for supplying destaticizing air to a cleaning portion of the cleaning object (W) to be cleaned by the blast nozzle, and a charging device for charging the destaticizing air with a polarity opposite to the polarity of the charged dry ice pellets.

Abstract: The object of this invention is to provide a cleaning method in accordance with the degree of soil and type of contaminant of a surface to be cleaned of a cleaning target. In order to achieve this object, in a method of cleaning a cleaning target, including an electrical component, with dry ice, during a process of blasting dry ice toward a surface to be cleaned from a location where the dry ice is stored, a size of the dry ice is adjusted, so cleaning is performed while a cleaning performance of the dry ice is changed in accordance with a type of soil or contaminant of the surface to be cleaned.

Abstract: The object of this invention is to clean a machine and device soiled in accordance with an atmosphere, where it has been used, to make it be suitable for recycle. In order to achieve this object, a cleaning target such as a unit or component including an electrical component is cleaned while dry ice and a detergent simultaneously act on a surface to be cleaned of the cleaning target.

Abstract: A magnetic disk unit of the invention comprises;a thin film magnetic head 1 for performing a specified magnetic recording/reproducing operation on a magnetic disk, a reproduction error detecting means 2 for detecting an error in reproduced data read by the thin film magnetic head 1, a current value setting means 3 for setting an amount of write current to be applied to the thin film magnetic head according to a condition of error detection of the reproduction error detecting means 2 as a value smaller compared with a normal write current value, and a write operation driving means 4 for applying a write current after being set by the current value setting means 3 to the thin film magnetic head 1.