Abstract: A flame retardant resin composition which is reasonable in price and possesses superior cold resistance, wear resistance and hot-water resistance, an insulated wire and a wiring harness. The flame-retardant resin composition includes a propylene polymer including an ethylene unit within a range of 1 to 15 mass %, and magnesium hydroxide derived from a natural mineral. The content of the magnesium hydroxide is preferably within a range of 50 to 200 parts by mass with respect to 100 parts by mass of a polymer component in the composition. A styrene-type thermoplastic elastomer is preferably included in the composition. A Charpy impact value of the propylene polymer at a temperature of ?20° C. is preferably 3 to 8 KJ/m2. An insulated wire includes a conductor and the flame-retardant resin composition which covers the conductor, and a wiring harness includes the insulated wire.

Abstract: An optical communication system can increase a minimum optical reception level or the number of connectable optical receivers by controlling optical output levels of its optical transmitter. The optical communication system includes the optical transmitter having an optical variable splitting controller for splitting received light into N parts and supplies them to N optical fibers, and N optical receivers for receiving the signals sent via the N optical fibers. The optical variable splitting controller regulates its optical output levels to be supplied to the N optical fibers by controlling the optical coupling ratios. For example, the optical variable splitting controller may regulate its optical output levels by controlling its optical coupling ratios such that optical reception levels become equal for all the N optical receivers.

Abstract: A repairing method for an endoscope includes inserting into a cylindrical heating element a repair part of at least one endoscope having a resin material applied on an outer peripheral surface of the endoscope, causing the heating element to generate heat by supplying power to the heating element in order to radiate infrared rays from the heating element toward the center of the cylinder, and drying/hardening the resin material in the repair part by using the infrared rays radiated from the heating element.

Abstract: A tubular flame burner, a combustion method, and combustion controller, are disclosed. Here, the tubular flame burner comprises: a tubular combustion chamber whose h one end is open; fuel-spraying nozzles and oxygen-containing-gas spraying nozzles. The respective nozzle orifices are formed in the inner face of the combustion chamber so that each spraying direction is in a neighborhood of a tangential direction of the inner circumferential wall of the combustion chamber. And an ignition device is disposed at a position r/2 from the tube axis of the combustion chamber (r: the radius of the combustion chamber). The length of the combustion chamber can be adjusted, the tubular flame burner is a multi-stage burner formed of multiple tubular flame burners, and a gap between the inner tube and the outer tube serves as a gas-flow path.

Abstract: An optical communication system can increase a minimum optical reception level or the number of connectable optical receivers by controlling optical output levels of its optical transmitter. The optical communication system includes the optical transmitter having an optical variable splitting controller for splitting received light into N parts and supplies them to N optical fibers, and N optical receivers for receiving the signals sent via the N optical fibers. The optical variable splitting controller regulates its optical output levels to be supplied to the N optical fibers by controlling the optical coupling ratios. For example, the optical variable splitting controller may regulate its optical output levels by controlling its optical coupling ratios such that optical losses from its input to inputs of the N optical receivers become equal for all the N optical receivers.