Abstract: The present invention discloses a SiC crystal, comprising: acceptor impurities that are in a concentration greater than 5×1017 cm?3; donor impurities that are in a concentration less than 1×1019 cm?3 and greater than the concentration of the acceptor impurities. The present invention discloses a semiconductor device, comprising: a SiC fluorescent layer having acceptor impurities that are in a concentration greater than 5×1017 cm?3 and donor impurities that are in a concentration less than 1×1019 cm?3 and greater than the concentration of the acceptor impurities; and a light emission layer that is layered on the SiC fluorescent layer and emits excitation light for the SiC fluorescent layer.

Abstract: An optical transmission apparatus that improves the reliability of system operation by efficiently limiting the line speed of a signal sent from a user with a guard mechanism. An optical branching section makes an optical signal branch in two directions. A through branching line passes an optical signal in its original condition and sends the optical signal as a through optical branch signal. A delay branching line delays an optical signal by a delay amount set and sends the optical signal as a delayed optical branch signal. An optical multiplexing section combines the through optical branch signal and the delayed optical branch signal.

Abstract: A dispersion compensating method for carrying out automatic level control with the use of target output power and an ASE correction value corresponding to the number of wavelengths to multiplex and making output power of a wavelength multiplexed signal constant, comprising the steps of: switching into automatic gain control in which the output power of the wavelength multiplexed signal is made constant, to carry out increase/decrease of the wavelengths to multiplex; varying a dispersion compensating amount based on the increase/decrease of the wavelengths by the automatic gain control; calculating an ASE variation amount due to the change in the dispersion compensating amount; and reflecting the ASE variation amount on the ASE correction value and switching into the automatic level control.

Abstract: A power-down delay unit for delaying cutoff of a voltage is provided in a power supply line which supplies electrical power to an optical module of a transponder unit for each optical wavelength. The power-down delay unit assigns different delays for each wavelength. The length of the delay is a time required by an AMP unit to change from an ALC mode to an AGC mode or longer. When the power sources for supplying electrical power to the transponder units becomes faulty and outputs of several wavelengths are simultaneously going to stop, the power-down delay unit delays cutoff of the supply voltage to the optical modules by keeping supply voltage for a while to the optical modules on behalf of power sources enabling the optical modules to operate after the power sources shutdown, so that the actual optical signals gradually stop one by one.

Abstract: The invention provides a lube base oil other than silicone oil having a kinematic viscosity of 12 mm2/s or below at 40° C., exhibiting, in Noack test (250° C., 1 hr), an evaporation loss of 30 mass % or below and/or a flash point of 200° C. or higher, and exhibiting an aniline point of 60° C. or higher. There is also provides a lubricating oil composition comprising the lube base oil mixed with at least one additive selected from the group consisting of an antioxidant, a viscosity index improver, a detergent dispersant, a friction reducing agent, a metal inactivator, a pour point depressant, an abrasion resisting agent, a defoamer, and an extreme-pressure additive. The lube base oil and the lubricating oil composition realize reduction of evaporation loss despite being of low viscosity and excellent compatibility with organic materials.

Abstract: The present invention discloses a SiC crystal, comprising: acceptor impurities that are in a concentration greater than 5×1017 cm?3; donor impurities that are in a concentration less than 1×1019 cm?3 and greater than the concentration of the acceptor impurities. The present invention discloses a semiconductor device, comprising: a SiC fluorescent layer having acceptor impurities that are in a concentration greater than 5×1017 cm?3 and donor impurities that are in a concentration less than 1×1019 cm?3 and greater than the concentration of the acceptor impurities; and a light emission layer that is layered on the SiC fluorescent layer and emits excitation light for the SiC fluorescent layer.

Abstract: A dispersion compensating method for compensating wavelength dispersion occurring in an optical transmission line, includes the steps of: a) performing dispersion compensation by causing an optical signal, supplied from the transmission line, to pass through a variable dispersion compensator; and b) controlling a dispersion compensating amount in the variable dispersion compensator according to code error information corresponding to a type of code in a received data signal obtained from receiving the optical signal having undergone the dispersion compensation.

Abstract: A dispersion compensating method for carrying out automatic level control with the use of target output power and an ASE correction value corresponding to the number of wavelengths to multiplex and making output power of a wavelength multiplexed signal constant, comprising the steps of: switching into automatic gain control in which the output power of the wavelength multiplexed signal is made constant, to carry out increase/decrease of the wavelengths to multiplex; varying a dispersion compensating amount based on the increase/decrease of the wavelengths by the automatic gain control; calculating an ASE variation amount due to the change in the dispersion compensating amount; and reflecting the ASE variation amount on the ASE correction value and switching into the automatic level control.

Abstract: An optical transmission apparatus that improves the reliability of system operation by efficiently limiting the line speed of a signal sent from a user with a guard mechanism. An optical branching section makes an optical signal branch in two directions. A through branching line passes an optical signal in its original condition and sends the optical signal as a through optical branch signal. A delay branching line delays an optical signal by a delay amount set and sends the optical signal as a delayed optical branch signal. An optical multiplexing section combines the through optical branch signal and the delayed optical branch signal.

Abstract: An electronic component of the invention has: a substrate; first to third terminal portions disposed on the substrate; and at least one spiral conductor portion disposed between the first and second terminal portions. The third terminal portion is not electrically connected to other portions of the substrate, and the first and second terminal portions are electrically connected to or disconnected from each other. In the electronic component, the number of production steps is smaller, the cost is lower, and a more highly accurate inductor component is realized as compared with a laminated electronic component in which emphasis is put on increase of the capacitor component. It is possible to realize an electronic component having accurate band- or low-pass filter characteristics.

Abstract: A printing apparatus has a plurality of image forming sections that are removably attached to a body of the printing apparatus and form images of different colors. The apparatus includes a specifying unit such as an operation panel and a control unit. The specifying unit specifies an image forming section that performs printing. The control unit controls the image forming section specified by the specifying unit to form an image of a corresponding color. The apparatus further includes a plurality of detectors that detect the presence and absence of corresponding image forming sections in the body. When the detector detects that a specified image forming section is present, the control unit controls the specified image forming section to operate. When the detector detects that the specified image forming section specified is absent, the control unit does not control the specified image forming section to operate.

Abstract: A dispersion compensating method for carrying out automatic level control with the use of target output power and an ASE correction value corresponding to the number of wavelengths to multiplex and making output power of a wavelength multiplexed signal constant, comprising the steps of: switching into automatic gain control in which the output power of the wavelength multiplexed signal is made constant, to carry out increase/decrease of the wavelengths to multiplex; varying a dispersion compensating amount based on the increase/decrease of the wavelengths by the automatic gain control; calculating an ASE variation amount due to the change in the dispersion compensating amount; and reflecting the ASE variation amount on the ASE correction value and switching into the automatic level control.

Abstract: The invention provides a lube base oil other than silicone oil having a kinematic viscosity of 12 mm2/s or below at 40° C., exhibiting, in Noack test (250° C., 1 hr), an evaporation loss of 30 mass % or below and/or a flash point of 200° C. or higher, and exhibiting an aniline point of 60° C. or higher. There is also provides a lubricating oil composition comprising the lube base oil mixed with at least one additive selected from the group consisting of an antioxidant, a viscosity index improver, a detergent dispersant, a friction reducing agent, a metal inactivator, a pour point depressant, an abrasion resisting agent, a defoamer, and an extreme-pressure additive. The lube base oil and the lubricating oil composition realize reduction of evaporation loss despite being of low viscosity and excellent compatibility with organic materials.

Abstract: A frame transmitting apparatus that transmits a frame including data to be transmitted or a frame including control data for a data-transmission control via a network includes a frame generating unit that generates a frame including identification-information-added data to which 1-bit identification information indicating whether a block obtained by dividing data into every n bits includes the control data is added, where n is a positive integer, and an error control code for a data-transmission error control; and a frame transmitting unit that transmits the frame generated.

Abstract: A method for forming a silicon nitride film which comprises heating a substrate (2) placed in the inner space (3) of a chamber (4) to a desired temperature, feeding a hexamethyl disilazane gas and a gas containing active species formed by the plasma excitation of an N2 gas to the chamber (4) holding the substrate (2), to thereby deposit a reaction product formed by the reaction of the hexaalkyldisilazan gas with the above active species and form the silicon nitride film. The method allows the formation of a silicon nitride film being reduced in the contents of carbon and hydrogen with safety and good efficiency.

Abstract: A dispersion compensating method for compensating wavelength dispersion occurring in an optical transmission line, includes the steps of: a) performing dispersion compensation by causing an optical signal, supplied from the transmission line, to pass through a variable dispersion compensator; and b) controlling a dispersion compensating amount in the variable dispersion compensator according to code error information corresponding to a type of code in a received data signal obtained from receiving the optical signal having undergone the dispersion compensation.

Abstract: A power-down delay unit 15 for delaying cutoff of a voltage is provided in the power supply line for supplying power to an optical module 14 of a transponder unit 16 of each wavelength. The power-down delay unit 15 assigns a different delay in power disconnection each wavelength. The length of the delay is a time required by an AMP unit or longer to change from an ALC mode to an AGC mode. With the configuration, when the power supply for supplying power to the plurality of transponder units 16 becomes faulty and output of a number of wavelengths simultaneously stops, the actual optical signal gradually stops output wavelength by one wavelength. Thereby a nonlinear effect because of going up of a power of an optical signal too much is not occurred, therefore it is able to prevent an undesired influence for a wavelength not to be stopped.

Abstract: The LC composite component of the present invention comprises a base, a first to third terminals provided on the base, a helical conductor provided on the base, and an internal layer conductor inside the base, the internal layer conductor being opposed to the helical conductor provided on the base, each of the first to third terminals being mutually and electrically noncontinuous, the helical conductor being provided in either position between the first to third terminals. A high-pass filter is thus realized. The component can be used for various devices that require a reduction in size and cost of the electronic device while ensuring the filter performance.

Abstract: The present invention relates to serial asynchronous transmission of data of fixed length in which a start bit and a stop bit are inserted at the head and tail, respectively, of the data. The insertion of a fixed bit having a predetermined logical value every predetermined number of bits of the data allows an idle state period to be reduced up to the predetermined number of bits plus 1 bit, resulting in considerable improvement in transmission efficiency.

Abstract: An electronic component of the invention has: a substrate; first to third terminal portions disposed on the substrate; and at least one spiral conductor portion disposed between the first and second terminal portions. The third terminal portion is not electrically connected to other portions of the substrate, and the first and second terminal portions are electrically connected to or disconnected from each other. In the electronic component, the number of production steps is smaller, the cost is lower, and a more highly accurate inductor component is realized as compared with a laminated electronic component in which emphasis is put on increase of the capacitor component. It is possible to realize an electronic component having accurate band- or low-pass filter characteristics.