摘要:
An optical transmission device includes a first optical output unit including a chip and outputting an optical signal having a predetermined wavelength according to a temperature, a second optical output unit including a chip of which a temperature is controlled independently of the chip of the first optical output unit and outputting an optical signal having a predetermined wavelength according to a temperature, a failure detecting unit detecting a failure of the chip in operation of the first optical output unit, a switching unit switching its operation to the chip of the second optical output unit whose output optical signal has a same wavelength as that of the optical signal of the chip in operation of the first optical output unit when the failure detecting unit detects the failure, and a transmitting unit transmitting the optical signal output from the chip of the second optical output unit.
摘要:
Sliding seal member for an internal combustion engine constituted by a sintered material comprising a compacted body of eutectic alloy particles and 4.0 to 6.0 weight percent of phosphor, 1.0 to 5.0 weight percent of carbon and the balance of iron, a suitable binding metal being infiltrated in the compacted body and the amount of the binder being 10 to 30 volume percent of the sealing member.
摘要:
An optical modulation apparatus that performs optimum bias voltage control for optical modulation without using a pilot tone. A drive unit generates a drive signal by adding a bias voltage to an input data signal. A light modulation unit modulates input light output from a light source unit, in accordance with the drive signal, and outputs the results as optical signals. A forward monitoring unit monitors a forward signal of the light modulation unit and outputs the forward signal. A reverse monitoring unit monitors a reverse signal of the light modulation unit and outputs a reverse signal. A bias control unit controls the bias voltage so that a measured monitor ratio matches a target value of the ratio between the forward signal and the reverse signal, obtained when the operating point of the light modulation unit is in a predetermined position on its operation characteristic curve.
摘要:
In an optical transmitter, a laser emits light. A laser driving controller controls driving of the laser by superimposing modulation signals on laser driving signals to generate laser driving superimposed signals and by applying the laser driving superimposed signals to the laser to cause wavelength fluctuations in laser output light to suppress nonlinear optical phenomena during optical fiber transmission. An optical power variable controller variably controls a power of the laser output light. An optical fluctuation compensator suppresses optical fluctuations by monitoring output light from the variable controller to detect optical fluctuations accompanying wavelength fluctuations from monitoring results and by controlling a gain of the variable controller.
摘要:
Novel compounds, 4-tert.-butyl-1,2-benzenedithiol and bis(4-tert.-butyl-1,2-dithiophenolate) metal complexes having the general formula of ##STR1## wherein M represents a trivalent transition metal, and A represents a quarternary ammonium are provided.The novel benzenedithiol is produced by reacting 4-tert.-butylbenzenethiol or di(4-tert.-butylphenyl)disulfide with sulfur monochloride in the presence of iodine or a Lewis acid in a solvent, and then reducing the resultant product with a metal selected from the group consisting of zinc, tin, iron and aluminum in the presence of an acid.The novel Cu, Co and Ni complexes are produced by reacting the benzenedithiol with a salt of the corresponding divalent transition metal in the presence of an alkoxide metal or a hydride metal and a quarternary ammonium salt in a solvent under an oxidative atmosphere.The complexes strongly absorb rays in the region of ultraviolet, visible or near infrared, and are useful intermediates for the production of optical information recording media.
摘要:
A valve-seat material ideal for valve seats for vehicle-engine exhaust valves with no cobalt contained therein, superior in general use, has superior wear-resistance in high-temperature oxidizing atmosphere, and can be used independently of types of fuel to be used in the non-lead gasoline, lead-contained gasoline, L.P.G. or the like. The recession amount of the valve is extremely decreased and the wear resistance is remarkably improved.
摘要:
Oil seal ring comprising a base body and a lip formed thereon. The base body is made of a relatively flexible iron based material such as a cast iron. The lip is made of a mixture of iron-based alloy and one or more carbides by melting and thereafter solidifying the mixture on the body. Composite carbides are produced in the alloy and added carbides are distributed in the metal and the composite carbides in the alloy.
摘要:
A vehicle-pedal backward-displacement preventing device. A pedal bracket has side plates each including a front end at which the pedal bracket is attached to the dash pane. A bulge protrudes in a protruding direction away from the other of the side plates. An operating pedal having a depressible portion is provided by its lower end portion. A guide member is associated with an upper end portion of the pedal bracket and a vehicle body member. The guide member causes the upper end portion of the pedal bracket to be downwardly displaced, upon displacement of the pedal bracket, whereby the pedal bracket is deformed with the side plates being made to buckle, so as to restrain the displacement of the depressible portion of the operating pedal toward a driver's seat. Each side plate has an aperture located in its region which includes a crest portion of the bulge, such that a strength of each side plate against a load is reduced most in the crest portion. Each side plate therefore can be made to buckle with the crest portion being displaced in the protruding direction.
摘要:
An object of the present invention is to provide a nerve regenerating drug, an agent for the promotion of neuropoiesis of a neural stem cell, a neuron obtained by culturing a neural stem cell in the presence of the agent for the promotion of neuropoiesis, and a method of the manufacture of the neuron. In order to achieve the object, the invention provides a nerve regenerating drug comprising a substance that inhibits the activity of glycogen synthase kinase-3, as an active ingredient; an agent for the promotion of neuropoiesis of a neural stem cell comprising the substance as an active ingredient; a neuron obtained by culturing a neural stem cell in the presence of the agent for the promotion of neuropoiesis; and a method of the manufacture of the neuron. The medical drug according to the invention is useful as a therapeutic drug for neurological diseases such as Parkinson's disease, Alzheimer's disease, Down's disease, cerebrovascular disorder, cerebral stroke, spinal cord injury, Huntington's chorea, multiple sclerosis, amyotrophic lateral sclerosis, epilepsy, anxiety disorder, schizophrenia, depression and manic depressive psychosis.
摘要:
A composite hydrogen storage alloy material includes a hydrogen storage alloy material and a surface material bonded to the surface of the hydrogen storage alloy material. The surface material has a potential energy between those of hydride of the hydrogen storage alloy and hydrogen gas and permits migration of hydrogen between the inside and outside of the hydrogen storage alloy material.