Abstract: A file system includes a calculator and a module. The calculator includes a storage unit and an auxiliary storage device. The storage unit temporarily stores data. The auxiliary storage device includes a disk that permanently stores the data. The module is configured to execute a compression process on I/O-requested data using a compression algorithm. The module is configured to separate and store the compressed data in the storage unit and the auxiliary storage device.

Abstract: To provide a system for simplifying setting of access control for a file system and a firewall, it is provided an access control system, which is formed by a computer including a processor configured to execute a process, and a memory configured to store a program for executing the process, the access control system comprising: a launcher, which is a process configured to activate the process; an ACL file in which specifics for controlling an I/O request issued by the process are defined; a process search module configured to trace a parent of the process to determine whether or not the process is an activated process that has originated from the launcher; and an access control module configured to control an I/O request issued by the activated process that has originated from the launcher in accordance with the specifics defined in the ACL file.

Abstract: Provided are a power steering device and a control device for a power steering device, which are capable of reducing power consumption. The power steering device includes a current detection number setting circuit configured to set the number of times of detection of a DC bus current value by a current detecting circuit to a first predetermined number over a first predetermined cycle of a PWM period when the steering-state signal indicative of a steering operation state is received, and to set the number of times of detection so that the number of times of detection becomes smaller than the first predetermined number over the first predetermined cycle of the PWM period when a steering-state signal indicative of a non-steered state is received.

Abstract: An object of the present invention is to realize a pressure sensor with a small variation in sensor characteristics. The pressure sensor includes a diaphragm having longitudinal and lateral sides, and four strain gauges disposed on the diaphragm. The four strain gauges are arranged at a center of the diaphragm. Two of the four strain gauges are arranged along a lateral direction, and other two strain gauges are arranged along a longitudinal direction.

Abstract: In a tape recording medium, a sliding layer has an electric resistance of 1×108 ?/sq or less, and contains carbon particles and solid particles. The carbon particles have a primary particle size of 30 nm or less and a BET specific surface area of 100 m2/g or more. The solid particles have a primary particle size of 100 nm or less, a Mohs' hardness in a range from 2.5 to 8, inclusive, a density of 3 g/cm3 or more, and a BET specific surface area of 30 m2/g or more.

Abstract: The present invention provides a field-effect transistor having an accumulation-layer-operation type field-effect transistor that includes a semiconductor layer in which a source region, a channel region, and a drain region that have either an N-type or P-type conductivity in common are formed, and a gate electrode disposed adjacent to the channel region via a gate insulating film, wherein the gate insulating film is made of a dielectric having a change gradient of a relative dielectric constant in which the relative dielectric constant changes to decrease according to the magnitude of a gate voltage applied to the gate electrode.

Abstract: Provided are a power steering device and a control device for a power steering device, which are capable of reducing power consumption. The power steering device includes a current detection number setting circuit configured to set the number of times of detection of a DC bus current value by a current detecting circuit to a first predetermined number over a first predetermined cycle of a PWM period when the steering-state signal indicative of a steering operation state is received, and to set the number of times of detection so that the number of times of detection becomes smaller than the first predetermined number over the first predetermined cycle of the PWM period when a steering-state signal indicative of a non-steered state is received.

Abstract: The present invention provides a field-effect transistor having an accumulation-layer-operation type field-effect transistor that includes a semiconductor layer in which a source region, a channel region, and a drain region that have either an N-type or P-type conductivity in common are formed, and a gate electrode disposed adjacent to the channel region via a gate insulating film, wherein the gate insulating film is made of a dielectric having a change gradient of a relative dielectric constant in which the relative dielectric constant changes to decrease according to the magnitude of a gate voltage applied to the gate electrode.

Abstract: An object of the present invention is to realize a pressure sensor with a small variation in sensor characteristics. The pressure sensor includes a diaphragm having longitudinal and lateral sides, and four strain gauges disposed on the diaphragm. The four strain gauges are arranged at a center of the diaphragm. Two of the four strain gauges are arranged along a lateral direction, and other two strain gauges are arranged along a longitudinal direction.

Abstract: In a mechanical quantity measuring device (1) having a sensor chip (2) which outputs a sense output (S) corresponding to a mechanical quantity acting on the object to be measured (4), and a flexible wiring board (3) which supports the sensor chip (2) and has a wire (6) to lead out the sense output (S) to outside, and in which in measuring the mechanical quantity, the sensor chip (2) and the flexible wiring board (3) are attached to the object to be measured (4), a cutout (5) is provided on the flexible wiring board (3) near the sensor chip (2) and on the side where the wire (6) is arranged for the sensor chip (2). Thus, change in the sense output (S) with time can be restrained.

Abstract: Provided are a brushless motor control device and a brushless motor system capable of preventing impossibility of intended control of a brushless motor resulting from false recognition that the brushless motor is in operation in spite of stoppage of the brushless motor. A brushless motor control unit calculates a voltage instruction, representing voltages to be applied to the brushless motor, according to a control instruction supplied from an upper control device. A position error calculation unit calculates and estimates a position error between d-q-axes and dc-qc-axes as rotational coordinate axes by use of the voltage instruction outputted by the brushless motor control unit, current values acquired by a coordinate transformation unit and revolution speed for control of the brushless motor. A fault detection unit judges whether the brushless motor is faulty or not based on the position error calculated by the position error calculation unit.

Abstract: A magnetic tape which comprises a nonmagnetic support, a magnetic layer which is formed on one surface of the nonmagnetic support, and a backcoat layer which comprises a binder and nonmagnetic powder containing carbon black as a component and which is formed on the other surface of the nonmagnetic support, having pits for optical servo formed thereon, characterized in that the average of the reflectance on the flat portion of the backcoat layer is 8.5% or higher, and that the maximum rate of fluctuation of the reflectance on the flat portion, depending on a position of the magnetic tape: [Maximum of absolute value of (Reflectance?Average reflectance)]×100/(Average reflectance) is 10% or lower. This magnetic tape is high in the initial S/N of the servo signal, and also high in the S/N of the servo signal found after the magnetic tape is run twice.

Abstract: A miniaturized direct-current switch with which power loss is reduced when establishing continuity of a direct-current path is provided. The direct-current switch includes an electronic open/close switch inserted in a direct-current path along which a direct current flows in order to make the direct-current path an open circuit or a closed circuit, a parallel mechanical open/close switch connected in parallel to the electronic open/close switch, and a switch control circuit that controls the opening or closing time difference mutually between the parallel mechanical open/close switch and the electronic open/close switch, wherein the switch control circuit makes the parallel mechanical open/close switch a closed circuit a predetermined time after the electronic open/close switch has been made a closed circuit.

Abstract: A mechanical quantity measuring device (100) includes a semiconductor substrate (1) attached to a measured object so as to indirectly measure the mechanical quantity acting on the measured object; a measuring portion (7) capable of measuring a mechanical quantity acting on the semiconductor substrate (1) at a central part (1c) of the semiconductor substrate (1); and plural impurity diffused resistors (3a, 3b, 4a, 4b) forming a group (5) gathering closely to each other in at least one place, on an outer peripheral part (1e) outside the central part (1c) of the semiconductor substrate (1). The plural impurity diffused resistors (3a, 3b, 4a, 4b) forming one of the group (5) are connected to each other to form a Wheatstone bridge (2a, 2b). Thus, the mechanical quantity measuring device (100) can securely detect its own exfoliation.

Abstract: In a mechanical quantity measuring device (1) having a sensor chip (2) which outputs a sense output (S) corresponding to a mechanical quantity acting on the object to be measured (4), and a flexible wiring board (3) which supports the sensor chip (2) and has a wire (6) to lead out the sense output (S) to outside, and in which in measuring the mechanical quantity, the sensor chip (2) and the flexible wiring board (3) are attached to the object to be measured (4), a cutout (5) is provided on the flexible wiring board (3) near the sensor chip (2) and on the side where the wire (6) is arranged for the sensor chip (2). Thus, change in the sense output (S) with time can be restrained.

Abstract: A semiconductor device manufacturing method includes the steps of forming a silicate film by performing a first step of forming a metal oxide film on a silicon substrate, and a second step of inducing a solid phase reaction between the metal oxide film and a surface of the silicon substrate by heat treatment, and forming a high dielectric constant insulating film on the silicate film.

Abstract: A magnetic tape apparatus includes a feeding unit for feeding a magnetic tape; a take-up unit for taking up the magnetic tape, a magnetic head disposed the downstream of the feeding unit and the upstream of the winding unit, in a traveling path of the magnetic tape from the feeding unit to the take-up unit, and having the moving magnetic tape abut to the magnetic head; a fixed guide unit disposed adjacent to the magnetic head at least in the upstream on downstream of the traveling direction of the magnetic tape traveling on the traveling path toward the magnetic head and guiding the magnetic tape to the traveling path by abutting to the magnetic tape; and a controlling unit disposed on the fixed guide unit for controlling the movement of the magnetic tape in the tape width direction. On a contact surface which abuts on the magnetic tape in the fixed guide unit, there is provided a space for excluding the air lying between the moving magnetic tape and the contact surface.

Abstract: Provided are a brushless motor control device and a brushless motor system capable of preventing impossibility of intended control of a brushless motor resulting from false recognition that the brushless motor is in operation in spite of stoppage of the brushless motor. A brushless motor control unit calculates a voltage instruction, representing voltages to be applied to the brushless motor, according to a control instruction supplied from an upper control device. A position error calculation unit calculates and estimates a position error between d-q-axes and dc-qc-axes as rotational coordinate axes by use of the voltage instruction outputted by the brushless motor control unit, current values acquired by a coordinate transformation unit and revolution speed for control of the brushless motor. A fault detection unit judges whether the brushless motor is faulty or not based on the position error calculated by the position error calculation unit.

Abstract: A miniaturized direct-current switch with which power loss is reduced when establishing continuity of a direct-current path is provided. The direct-current switch includes an electronic open/close switch inserted in a direct-current path along which a direct current flows in order to make the direct-current path an open circuit or a closed circuit, a parallel mechanical open/close switch connected in parallel to the electronic open/close switch, and a switch control circuit that controls the opening or closing time difference mutually between the parallel mechanical open/close switch and the electronic open/close switch, wherein the switch control circuit makes the parallel mechanical open/close switch a closed circuit a predetermined time after the electronic open/close switch has been made a closed circuit.