Abstract: There is disclosed a magnetic disc device wherein temperature increase in the head IC chip can effectively suppressed. The magnetic head device comprises a slider having a magnetic head, a suspension structure having one end supporting the slider, and a head IC chip, the head IC chip being mounted on the suspension structure at a side adapted to be faced to a magnetic recording disc. A flow of air produced by the rotation of the magnetic disc cols the head IC chip in operation.

Abstract: In a thin film magnetic head device including a reading giant magneto-resistive thin film magnetic head element whose electric equivalent circuit is expressed by a series circuit of an equivalent voltage source and a series resistor RH and a parallel capacitor C connected in parallel with said series circuit, inductor L is connected in series with said series resistor RH and a parallel resistor R is connected in series with said parallel capacitor C. The coil L and parallel capacitor C are set such that an angular frequency &ohgr;0=1/(LC)1/2, an angular frequency &ohgr;1=1/CR and an angular frequency &ohgr;H=1/CRH satisfy conditions of &ohgr;0>&ohgr;1 and &ohgr;0>&ohgr;H, preferably &ohgr;0>>&ohgr;1 and &ohgr;0>>&ohgr;H to extend a frequency characteristic toward a high frequency range.

Abstract: A spread spectrum communication apparatus for communicating through a plurality of communication channels corresponding to a plurality of diffusion codes comprises a selector to select the number of communication channels which are used in accordance with a communication partner, and a communication unit to communicate with the communication partner through the communication channels of the number selected by the selector. The communication unit has a division unit to divide transmission data in accordance with the number of communication channels selected. The selector selects the number of communication channels in accordance with whether the communication partner is a color terminal or a black and white terminal, or in accordance with a processing speed of the communication partner, or in accordance with whether the communication partner processes binary image data or processes multivalue image data.

Abstract: This invention obtains an image forming apparatus and image forming method capable of achieving a simple, low-cost arrangement by controlling memory write-in/read-out similarly to image signal generation using a single beam even when an image is formed using a plurality of light beams. Write-in of a first light beam image signal in a memory A starts before a first light beam image signal for previous scanning is completely read out from the memory A. Write-in of a second light beam image signal in a memory B starts after a second light beam image signal for previous scanning is completely read out from the memory B.

Abstract: A laser driving method is adapted for driving a plurality of laser emitting devices. A first current to be supplied to each of the plurality of laser emitting devices is always generated. A plurality of second currents controlled according to a control signal supplied from the outside are generated when necessary. The plurality of second currents are supplied to the respective laser emitting devices under supply of the respective first currents, thereby making the laser emitting devices emit respective laser beams. The plurality of laser emitting devices are caused to emit the laser beams in time division at predetermined timing to detect each of emitted light amounts by one laser monitor. Adjustment is made to at least one of the first current and the second current supplied to each of the laser emitting devices according to a plurality of detected light amounts detected.

Abstract: A laser driving method is adapted for driving a plurality of laser emitting devices. A first current to be supplied to each of the plurality of laser emitting devices is always generated. A plurality of second currents controlled according to a control signal supplied from the outside are generated when necessary. The plurality of second currents are supplied to the respective laser emitting devices under supply of the respective first currents, thereby making the laser emitting devices emit respective laser beams. The plurality of laser emitting devices are caused to emit the laser beams in time division at predetermined timing to detect each of emitted light amounts by one laser monitor. Adjustment is made to at least one of the first current and the second current supplied to each of the laser emitting devices according to a plurality of detected light amounts detected.

Abstract: The present invention is directed to a slider, a head, a head device and a read/write apparatus that are extremely effective for achieving high density writing and an increase in the storage capacity. The slider comprises a front flat surface, a first positive pressure generating portion, a second positive pressure generating portion and a first negative pressure generating portion. The front flat surface, which is provided starting at a leading edge, ends at an intermediate point along a lengthwise direction. The first and second positive pressure generating portions have flat surfaces which are essentially of equal heights and are positioned separated from each other over a distance at two sides in a widthwise direction running perpendicular to a lengthwise direction, with edges at one end located toward the leading edge forming step faces rising up from the front flat surface in a step.

Abstract: A magnetic disk medium of the invention comprises a disk form of substrate, a multiplicity of unit minuscule recording areas formed of a magnetic material on the substrate to magnetically record information thereon and located concentrically or spirally at an interval in a peripheral or radial direction, and a non-recording area provided on the substrate and formed of a non-magnetic material that is embedded between the unit minuscule recording areas. Each unit minuscule recording area is in a form having a major axis and a minor axis, wherein the direction of the major axis is aligned with the radial direction of the substrate.

Abstract: An image forming apparatus, including a driving circuit for a multichip laser chip, which can limit or interrupt emission of laser light sources in accordance with a result of comparison of an optical output of each laser light source with a limiting value during time-division control is provided. The apparatus includes a plurality of laser light source, a light-amount control device for controlling an optical output of a laser beam from each of the plurality of laser light sources to a constant amount of light by performing time division processing, and a light detection device for detecting optical outputs of the plurality of laser light sources. The light detection device includes sensor units whose number is smaller than the number of the plurality of laser light sources.

Abstract: A read/write head includes a slider provided with an electromagnetic transducer element (or an optical module), an actuator, and a suspension. The actuator includes a fixed part, a movable part, and at least two beam members for coupling them together. The beam members have a displacement generating means that elongates and contracts by inverse piezoelectric effect or electrostrictive effect. The fixed part is fixed to the suspension, and the movable part is fixed to the slider. Upon the elongation and contraction of the displacement generator, the displacement generator deflects and the movable part displaces linearly, circularly or rotationally with respect to the fixed part, and the electromagnetic transducer element displaces in a linear or circular orbit, so that the electromagnetic transducer element intersects recording tracks.

Abstract: The present invention is directed to a slider, a head, a head device and a read/write apparatus that are extremely effective for achieving high density writing and an increase in the storage capacity.The slider comprises a front flat surface, a first positive pressure generating portion, a second positive pressure generating portion and a first negative pressure generating portion. The front flat surface, which is provided starting at a leading edge, ends at an intermediate point along a lengthwise direction. The first and second positive pressure generating portions have flat surfaces which are essentially of equal heights and are positioned separated from each other over a distance at two sides in a widthwise direction running perpendicular to a lengthwise direction, with edges at one end located toward the leading edge forming step faces rising up from the front flat surface in a step.

Abstract: A spin valve magnetoresistance device including a free magnetic layer, a pinned magnetic layer, a non-magnetic layer disposed between them and a permanent magnet film defining a track width x(in .mu.m) and configured to control magnetic domains of the free magnetic layer. The product of the residual magnetization (in .mu.emu/cm.sup.3) of the permanent magnet film times the thickness (in cm) thereof is given by f(x):f(x)=-11.24(1/x.sup.2)+A,where x.ltoreq.2 .mu.m, and 670 .mu.emu/cm.sup.2 .ltoreq.A.ltoreq.900 .mu.emu/cm.sup.2.

Abstract: A noise detecting and recording apparatus which can be widely used for countermeasures against malfunction of electronic equipment which is caused by noises is provided. The apparatus is provided with a unit for outputting data corresponding to the level of a conduction noise, a unit for outputting the data corresponding to the level of a radiation electromagnetic field noise, a unit for outputting the data corresponding to the level of a discharge noise, a temperature and humidity detection unit for detecting temperature and humidity and outputting the data corresponding to the detected value, a microcomputer for processing the output data from each unit, a display unit for displaying the output data, and a recording device for recording data, wherein the microcomputer performs the processing of receiving the output data from each unit and supplying the data to the display unit, and the processing of receiving the output data from each unit and recording the data in the recording device.

Abstract: There is disclosed a magnetic disc device wherein temperature increase in the head IC chip can effectively suppressed. The magnetic head device comprises a slider having a magnetic head, a suspension structure having one end supporting the slider, and a head IC chip, the head IC chip being mounted on the suspension structure at a side adapted to be faced to a magnetic recording disc. A flow of air produced by the rotation of the magnetic disc cols the head IC chip in operation.

Abstract: There is disclosed an image forming apparatus, such as a copying machine, capable of various image forming modes. The image forming mode can be selected by feeding a mode registration format sheet into the apparatus. The format sheet can be a marking sheet, on which the operator can designate the desired image forming mode, and can be printed by the image forming apparatus itself in response to an instruction by the operator, so that the format sheet need not be prepared elsewhere in advance. Also the content of the format sheet, printed by the image forming apparatus, is varied according to the available copying modes, depending on the connection status of external processing units such as document feeder and sorter to the image forming apparatus.

Abstract: A germanium detector measures an energy spectrum of a gamma ray flux. The detector includes a cooling layer continuous over a periphery of the columnar germanium crystal. The cooling layer reduces current leakage induced by heat, so that high energy gamma rays can be precisely detected. A combination of a plurality of germanium crystal bodies connected one another to form the germanium crystal of at least 20 cm leads to a more precise detection of high energy gamma rays. A method for determining a photonuclear reaction cross section using the germanium detector enables measurement of the energy dependence of a photonuclear reaction cross section at high resolution. The method employs a white gamma ray flux radiated to a nuclide. The germanium detector measures the spectrum of a transmission gamma ray flux transmitted through the nuclide. Peaks are specified in the obtained spectrum. An atomic nucleus can be transformed using a monochromatic gamma ray flux having an energy level corresponding to the peak.

Abstract: A substituted cyclic amine compound represented by the following general formula (1) ##STR1## wherein each of R.sup.1 to R.sup.5 represents a hydrogen atom, a halogen atom, a lower alkyl group, a lower alkoxy group or the like, A represents a carbonyl group or a sulfonyl group, B represents a methine moiety or a nitrogen atom, D represents a methine moiety, a nitrogen atom or .dbd.N(.fwdarw.O)-- and n is an integer of 2 to 3; and synthetic methods thereof. The inventive compound is useful in preventing and treating circulatory organ-related diseases such as hypertension, ischemic heart disease, cerebrovascular disease, peripheral circulatory disease and the like.

Abstract: A germanium detector measures an energy spectrum of gamma ray flux. The detector includes a copper cooling layer continuous over a periphery of the columnar germanium crystal. The cooling layer reduces current leakage induced by heat, so that high energy gamma rays can be precisely detected. A combination of a plurality of germanium crystal bodies connected one another to form the germanium crystal of at least 20 cm leads to a more precise detection of high energy gamma rays.

Abstract: A memory management control device and a memory management control method capable of preventing run away of an image processing apparatus caused by a rewrite to a memory, are provided. In rewriting a program stored in a flash memory 402 of a controller 400 included in an image processing apparatus, an operating state detector 500 detects the operating state of the image processing apparatus and transmits the detection result to an external apparatus 9. On the basis of this detected operating state, the external apparatus 9 performs rewrite control for the flash memory 402. If the image processing apparatus is in operation, or is in an intermediate state, an abnormal state, or a wait state, a rewrite action is executed after the state is canceled.