Abstract: An optical wavelength-multiplexing system allowing long distance transmission with reducing effects of noise and fiber nonlinealities is disclosed. First wavelength-multiplexing light and second wavelength-multiplexing light within a wavelength bandwidth of 100 nm or more are propagated in opposite directions through the same optical fiber. The wavelength band of the first wavelength-multiplexing light is set to a shorter wavelength side as compared to that of the second wavelength-multiplexing light. In addition, excitation light having a wavelength shorter than the wavelength band of the first wavelength-multiplexing light is propagated through the optical fiber in the same direction as the second wavelength-multiplexing light. The excitation light is shorter in wavelength than the first wavelength-multiplexing light by an amount determined depending on Raman scattering characteristic of the optical fiber.

Abstract: An optical disk recording apparatus for recording information onto a write-once or erasable optical disk has a memory component including a table of prerecorded correction curves consisting of recording power correction values corresponding to radial positions for each type of a variety of different optical disks, a correction component for correcting the recording power in an optimum power control operation (OPC) operation using the appropriate correction value, and a recording component for recording information onto the optical disk using the corrected recording power.

Abstract: An optical communication receiver of this invention includes a photoelectric converter for converting an input optical signal into an electrical signal, a signal divider for dividing the electrical signal from the photoelectric converter into a plurality of signals, a clock extractor for reconstructing a clock of the photoelectrically converted input signal, phase adjusters for giving different delays to the respective signal decision timing clocks from the clock extractor or the plurality of electrical signals divided by the signal divider, a plurality of code decision units for performing code decision of the plurality of electrical signals at different timings, and an OR circuit for ORing the outputs from the plurality of code decision units. An input optical signal may be divided into signals by an optical divider before it is converted into an electrical signal.

Abstract: A miniaturized magnetic head which can reduce running torque of a disk driving motor while head-touch and penetration margin of the magnetic head remain effective. The magnetic head comprises a slider which slides on a flexible magnetic disk, a head core, integrally formed with the slider, to perform recording/reproducing of information on/from the flexible magnetic disk, and a groove, having a width of less than 0.4 mm, formed on a sliding surface of the slider, the groove extending in a tangential direction of the rotation of the flexible magnetic disk and reaching from one end of the slider to the other end of the slider.

Abstract: A wavelength division-multiplexing optical communication apparatus and method includes a plurality of modulators for respectively modulating the intensity of a plurality of light rays, each having a different wavelength from one another, with a data signal from a signal source, a wavelength division-multiplexer for combining the light from the modulators, fiber optics for transmitting light from the wavelength division multiple and a wavelength division-multiplexed light receiver for separating the light from the transmission path fiber optics by wavelength (and receiving the separated light, respectively. The light modulators control or select a magnitude of the phase modulation caused at the time of intensity modulation, and the modulator for each light wavelength is separately controlled and selected for the operating point, so as to cause a phase modulation component which minimizes the waveform distortion after transmission through the transmission path fiber optics.

Abstract: The present invention describes a monoclonal antibody which recognizes the C-terminal region of human glicentin. The antibody is useful for assaying for the presence of glicentin in a sample.

Abstract: Disclosed is a semiconductor optical modulator which has: semiconductor input-light waveguide with an incidence end; a semiconductor Y-branch element for branching light from the semiconductor input-light waveguide into two equal lights; first and second semiconductor optical waveguides for propagating the two lights, respectively branched by the semiconductor Y-branch element; first and second electrodes provided on the first and second optical waveguides, respectively; a semiconductor optical coupling element for coupling the two lights passed through the first and second optical waveguides; and a semiconductor output-light waveguide for leading light coupled in the semiconductor optical coupling element to an emission end of the semiconductor output-light waveguide; wherein the semiconductor optical modulator is provided with a means for producing a phase difference of 180.degree.

Abstract: An assembling position-adjusting mechanism of a magnetic disk apparatus able to adjust the azimuth, radial alignment, and index of a magnetic head by adjusting a position thereof during the assembling process of a spindle motor. A positioning head movable in a direction perpendicular to a top surface of a table is provided. A plurality of positioning pins are provided on the bottom of the positioning head. Moving mechanisms are provided in the positioning head so that the bottom surface of the positioning head is movable and rotatable parallel to the top surface of the table. Each positioning pin of the positioning head is inserted into a respective positioning hole of a motor assembly so as to move the motor assembly with a movement of the positioning head so that the spindle motor of the motor assembly is at an appropriate position relative to the magnetic head of the main body of the magnetic disk apparatus.

Abstract: A motorcycle is provided with first and a second fuel tanks. These tanks are provided with fuel charging ports respectively. Both the fuel tanks are intercommunicated through a communicating pipe. Since the communicating pipe can be shut by a cock, fuel can be charged into both the tanks promptly through both the fuel charging ports. The communicating pipe is provided with a fuel pump actuated by a diaphragm communicated with an intake manifold of an engine. Accordingly, even if one of the fuel tanks is disposed at a location lower than the carburetor, fuel within the fuel tank can be fed to the carburetor via the other fuel tank. The first and the second fuel tanks may be combined to constitute a single fuel tank.

Abstract: A rear suspension system for motorcycles in which a front end of a rear wheel supporting member having the rear wheel supported thereby is connected to a chassis frame in such a manner as to permit oscillation thereof in an upward or downward direction, a damper having one end connected to the chassis frame is connected to the rear wheel supporting member at the other end thereof by a first link, and the chassis frame and the first link are connected by the second link. Due to an arrangement of the first link in which its longitudinal axis extends substantially in a vertical direction, a space occupied by the progressive link mechanism is made to be relatively small and thus it is possible to provide a sufficient space for units such as a battery and air cleaner and the like.

Abstract: A rear suspension system in a two-wheeled vehicle having a body frame, a front wheel and a rear wheel. The rear suspension system comprises a rear fork member having a front end pivotably connected to the body frame and a rear end which rotatably supports the rear wheel, and an elastic band member stretched between the rear fork member and the body frame. With such arrangement, favorable comfort characteristics are ensured while at the same time weight is reduced.

Abstract: A suspension apparatus for a vehicle having left and right wheels and comprising a pair of left and right trailing arms connected to a respective wheel, and a pair of laterally extending left and right rotary shafts connected to respective arms. The outer ends of the shafts are supported in bearings on the vehicle to permit individual rotation of the shafts and corresponding rocking of the arms and a tubular coupling interconnects the rotary shafts at the inner ends thereof also to permit individual rotation of the shafts. The suspension apparatus can be of semi-trailing type in which case the rotary shafts have bends therein and their inner ends rotate in the coupling about axes which are inclined with respect to the axes of rotation of the shafts in the bearings.