Abstract: Disclosed is a rubber molded body formed from a rubber composition, wherein the rubber composition contains: a natural rubber and a butadiene rubber as predominant rubber components; a low-melting paraffin wax having a melting point of 45 to 57° C.; and optionally a low-melting fatty acid amide having a melting point of 35 to 85° C., wherein the mass ratio of the natural rubber to the butadiene rubber ranges from 80/20 to 10/90, wherein the amount of the low-melting paraffin max contained in the rubber composition ranges from 20 to 70 parts by mass per 100 parts by mass of all rubber components, and wherein the total amount of the low-meting paraffin wax and the low-melting fatty acid amide contained in the rubber composition ranges from 30 to 100 parts by mass per 100 parts by mass of all rubber components.

Abstract: There is provided a wound thread package that is unlikely to cause problems such as cob-webbing and collapse at the time of unwinding even when the wound thread is a multi-filament thread or tape-like thread, and a manufacturing method for the same. To manufacture a wound thread package 1 by winding a plurality of multi-filament threads or tape-like threads having a total fineness of 100 to 6400 dtex per thread around a bobbin 2 by a traverse method, the threads constituting a thread layer 3 are arranged at intervals therebetween and wound with the same in traverse width w and at different traverse reverse positions.

Abstract: There is provided a wound thread package that is unlikely to cause problems such as cob-webbing and collapse at the time of unwinding even when the wound thread is a multi-filament thread or tape-like thread, and a manufacturing method for the same. To manufacture a wound thread package 1 by winding a plurality of multi-filament threads or tape-like threads having a total fineness of 100 to 6400 dtex per thread around a bobbin 2 by a traverse method, the threads constituting a thread layer 3 are arranged at intervals therebetween and wound with the same in traverse width w and at different traverse reverse positions.

Abstract: A circuit module includes: control object circuits which start operations when a power supply voltage reaches a target value; a current sink circuit which consumes a current supplied thereto; and a power supply activation control unit which increases the current flowing into the current sink circuit at a predetermined rate before starting the operations of the control object circuits and which starts the operations of the control object circuits and simultaneously blocks the supply of the current to the current sink circuit in a case where an amount of the current flowing into the current sink circuit is equivalent to an amount of current to be increased by starting the operations of the control object circuits when the power supply voltage reaches the target value.

Abstract: A circuit module includes: control object circuits which start operations when a power supply voltage reaches a target value; a current sink circuit which consumes a current supplied thereto; and a power supply activation control unit which increases the current flowing into the current sink circuit at a predetermined rate before starting the operations of the control object circuits and which starts the operations of the control object circuits and simultaneously blocks the supply of the current to the current sink circuit in a case where an amount of the current flowing into the current sink circuit is equivalent to an amount of current to be increased by starting the operations of the control object circuits when the power supply voltage reaches the target value.

Abstract: An optical transmitter includes a light source that outputs light superposed with a pilot signal having a predetermined frequency; an optical modulating unit that modulates the light from the light source according to an input electric signal; a detecting unit that detects a high-output-side maximum value of signal light output from the optical modulating unit, a fluctuation width of the high-output-side maximum value, and a fluctuation width of a low-output-side minimum value; a bias-potential adjusting unit that adjusts a bias potential of an electric signal to be input to the optical modulating unit based on the detected maximum value; and an amplitude adjusting unit that adjusts an amplitude of the electric signal to be input to the optical modulating unit based on the fluctuation width of the high-output-side maximum value and the fluctuation width of the low-output-side minimum value.

Abstract: An optical transmitter includes a light source that outputs light superposed with a pilot signal having a predetermined frequency; an optical modulating unit that modulates the light from the light source according to an input electric signal; a detecting unit that detects a high-output-side maximum value of signal light output from the optical modulating unit, a fluctuation width of the high-output-side maximum value, and a fluctuation width of a low-output-side minimum value; a bias-potential adjusting unit that adjusts a bias potential of an electric signal to be input to the optical modulating unit based on the detected maximum value; and an amplitude adjusting unit that adjusts an amplitude of the electric signal to be input to the optical modulating unit based on the fluctuation width of the high-output-side maximum value and the fluctuation width of the low-output-side minimum value.

Abstract: An optical transmitter includes: a modulating unit that modulates an optical signal based on an electric signal; a first detecting unit that detects a first variation width of a maximum output of the modulated optical signal; a second detecting unit that detects a second variation width of a minimum output of the modulated optical signal; a comparing unit that performs a comparison of the first variation width and the second variation width; and an adjusting unit that adjusts a bias potential of the electric signal based on a result of the comparison.

Abstract: A power supply control circuit includes: a conducting part configured to be controllable in its a conducting amount for conducting a power supply current to a load circuit; a current change ratio detecting part detecting a change rate of the power supply current supplied to the load circuit; and a control part controlling the conducting amount of the conducting part according to the change rate of the power supply current detected by the current change detecting part, wherein: the control part carries out feedback control of reducing an increasing rate of the conducting part as the power supply current change rate is larger.

Abstract: An optical transmitter includes: a modulating unit that modulates an optical signal based on an electric signal; a first detecting unit that detects a first variation width of a maximum output of the modulated optical signal; a second detecting unit that detects a second variation width of a minimum output of the modulated optical signal; a comparing unit that performs a comparison of the first variation width and the second variation width; and an adjusting unit that adjusts a bias potential of the electric signal based on a result of the comparison.

Abstract: A power supply control circuit includes: a conducting part configured to be controllable in its a conducting amount for conducting a power supply current to a load circuit; a current change ratio detecting part detecting a change rate of the power supply current supplied to the load circuit; and a control part controlling the conducting amount of the conducting part according to the change rate of the power supply current detected by the current change detecting part, wherein: the control part carries out feedback control of reducing an increasing rate of the conducting part as the power supply current change rate is larger.

Abstract: An ultrasonic flow meter for measuring a flow rate in a flow path is provided having ultrasonic sensors each of which includes a semicircular or substantially circular disk shaped transducer. Such transducers are detachably mountable on an envelope of the flow path. The thickness of the ultrasonic sensors in the direction of the length of the flow path is reduced to improve a detection resolution. A plurality of the ultrasonic sensors are mounted on the flow path while keeping a predetermined distance therebetween in a length direction of the flow path, so that the flow rate can be measured from the difference of propagation times of ultrasonic waves between the ultrasonic sensors.

Abstract: The invention provides a method for measuring transmission loss in an optical transmission line between a master station and a slave station, and also a slave station, a master station and a star network communication system using this method. Power of an optical signal is measured at a second end of an optical transmission line connected with an added slave station and at a first end other than the second end. The result at the first end is stored in a storing unit or transmitted to an incorporating unit by a transferring unit. The incorporating unit incorporates the result into a downstream optical signal, which is transmitted to the slave station. In the slave station an information extracting unit extracts the result from the downstream optical signal, and a processing unit calculates a difference between the measurement results of the first and second ends to obtain transmission loss therebetween.

Abstract: An ultrasonic flow meter for measuring a flow rate in a flow path is provided having ultrasonic sensors each of which includes a semicircular or substantially circular disk shaped transducer. Such transducers are detachably mountable on an envelope of the flow path. The thickness of the ultrasonic sensors in the direction of the length of the flow path is reduced to improve a detection resolution. A plurality of the ultrasonic sensors are mounted on the flow path while keeping a predetermined distance therebetween in a length direction of the flow path, so that the flow rate can be measured from the difference of propagation times of ultrasonic waves between the ultrasonic sensors.

Abstract: A flow rate measuring apparatus capable of accurately measuring a flow rate of fluctuating fluid. A mode setting circuit selectively sets any one of a plurality of predetermined transmission modes different in transmission timing. The mode setting circuit sets any one of a first transmission mode which permits an ultrasonic wave to be transmitted at a predetermined timing for every period of a flow waveform of exhaust gas, a second transmission mode which permits an ultrasonic wave to be transmitted at a timing shifted by a predetermined time for every period of the flow waveform of the exhaust gas and a third transmission mode which permits an ultrasonic wave to be transmitted at predetermined intervals.

Abstract: A semiconductor device includes a plurality of internal row pads and external row pads, consisting of a pad and a pad-control portion that controls an input signal from and an output signal to the pad. The pad and the pad-control portion of the internal row pad are disposed in relationship of reversed arrangement with the pad and the pad-control portion of the external row pad. A plurality of the internal row pads in which the pad and the pad-control portion are disposed in the bonding direction and a plurality of the external row pads in which the pad and the pad-control portion are disposed in the bonding direction are each alternately disposed adjacent perpendicularly to the bonding direction.

Abstract: A semiconductor device includes a plurality of internal row pads and external row pads, consisting of a pad and a pad-control portion that controls an input signal from and an output signal to the pad. The pad and the pad-control portion of the internal row pad are disposed in relationship of reversed arrangement with the pad and the pad-control portion of the external row pad. A plurality of the internal row pads in which the pad and the pad-control portion are disposed in the bonding direction and a plurality of the external row pads in which the pad and the pad-control portion are disposed in the bonding direction are each alternately disposed adjacent perpendicularly to the bonding direction.