Abstract: A travel sickness estimation system includes an estimation unit and an output unit. The estimation unit is configured to perform estimation processing of estimating, based on person information indicating conditions of a person who is on board a moving vehicle, whether or not the person is in circumstances that would cause travel sickness for him or her. The output unit is configured to output a result of the estimation processing performed by the estimation unit.

Abstract: Provided is a polycarbonate polyol composition comprising an unmodified polycarbonate polyol having a carbonate structure represented by the following formula (A), and a modified polycarbonate polyol having a carbonate structure represented by the following formula (A) and a urethane structure represented by the following formula (B), wherein 90% by mol or more of the total quantity of terminal groups of all the compounds in the composition is hydroxy groups, and the number of functional groups calculated according to the following expression (II) is 2.00 to 10.00: The number of functional groups=Mn×OHV/56.

Abstract: Provided is a polycarbonate diol composition comprising a polycarbonate diol represented by a specific formula and a diol component represented by a specific formula, wherein 90% by mol or more of the total quantity of terminal groups is hydroxy groups, a hydroxy value is 10 to 400 mg-KOH/g, a proportion of the polycarbonate diol is 80% by mass or more and 99.90% by mass or less and a proportion of the diol component is 0.10% by mass or more and 20% by mass or less based on 100% by mass in total of the carbonate diol and the diol component.

Abstract: A polycarbonate diol composition comprising polycarbonate diol having a structure represented by the following general formula (I) and a polycarbonate structure represented by the following general formula (II), wherein melt viscosity at 50° C.

Abstract: An electromagnetic resonance coupler includes a first transmission line on a top surface of a first dielectric layer, and a second transmission line on a top surface of a second dielectric layer. The first transmission line includes first and second resonance lines and first and second input-output lines. The second transmission line includes third and fourth resonance lines and third and fourth input-output lines. Third and fourth ground parts are provided separated from each other on the top surface of the second dielectric layer or the top surface of the first dielectric layer. The first resonance line and the third ground part are connected via a third connector, and the fourth resonance line and the fourth ground part are connected via a fourth connector.

Abstract: A travel sickness estimation system includes an estimation unit and an output unit. The estimation unit is configured to perform estimation processing of estimating, based on person information indicating conditions of a person who is on board a moving vehicle, whether or not the person is in circumstances that would cause travel sickness for him or her. The output unit is configured to output a result of the estimation processing performed by the estimation unit.

Abstract: A gate driving circuit that controls a switching element includes: a startup switch which is provided between a gate voltage source and an output terminal; a termination switch which is provided between the output terminal and an output ground terminal; a startup resistor provided between a gate and a source of the startup switch; and a termination resistor provided between a gate and a source of the termination switch. At least one of the startup resistor or the termination resistor is configured to adjust a resistance value.

Abstract: A signal generation device, including: an insulation element having transmission and reception units, and isolatedly transmitting an input wave introduced to the transmission unit, to thereby output an output wave from the reception unit; a power unit generating a voltage according to the output wave; a terminal having an output signal corresponding to the voltage; a generation unit generating a control signal; an insulation unit isolatedly transmitting the control signal, and generating a drive signal according to the control signal; a selection unit selecting whether to output the output signal to the terminal, according to the drive signal; a detection unit generating a detection signal indicating the state of the output signal, according to a detection wave obtained from the transmission unit; and a control signal adjustment unit adjusting the control signal according to the detection signal, the output signal being adjusted according to the adjustment of the control signal.

Abstract: An electromagnetic resonant coupler includes an input line to which a transmission signal is input; a first resonance line connected to the input line; a second resonance line opposing the first resonance line, the second resonance line undergoing resonant coupling with the first resonance line to thus wirelessly transmit the transmission signal between the first resonance line and the second resonance line; an output line connected to the second resonance line, the transmission signal being output through the output line; a coupling line that electromagnetically couples with at least one selected from the group consisting of the first resonance line and the second resonance line; and a terminator connected to one end of the coupling line.

Abstract: A high-frequency transmission device includes first and second resonators as ring-shaped wires each having an opening part at a part thereof, first and second input/output terminals each electrically connected to both resonators, a first ground shield formed on a plane different from planes on which both resonators are arranged, a second ground shield formed on a plane different from the planes on which both resonators and the first ground shield are arranged, and first and second ground wires each formed to surround peripheries of both resonators. The ground shields and the ground wires are respectively connected to each other. A dielectric wire is present between both ground wires, and the ground wires are not electrically connected to each other.

Abstract: A signal generation device, including: an insulation element having transmission and reception units, and isolatedly transmitting an input wave introduced to the transmission unit, to thereby output an output wave from the reception unit; a power unit generating a voltage according to the output wave; a terminal having an output signal corresponding to the voltage; a generation unit generating a control signal; an insulation unit isolatedly transmitting the control signal, and generating a drive signal according to the control signal; a selection unit selecting whether to output the output signal to the terminal, according to the drive signal; a detection unit generating a detection signal indicating the state of the output signal, according to a detection wave obtained from the transmission unit; and a control signal adjustment unit adjusting the control signal according to the detection signal, the output signal being adjusted according to the adjustment of the control signal.

Abstract: A signal inverting device generates an inverted signal of an input signal. The device includes a normally-on transistor, a negative-voltage generating unit that generates a negative voltage, and an output terminal. A first terminal of the normally-on transistor is connected to a current source. The output terminal is connected between the first terminal of the normally-on transistor and the current source. The normally-on transistor is turned on/off, by an input of a drive signal to a conduction control terminal of the normally-on transistor. The drive signal is a signal obtained by a synthesis of the input signal and the negative voltage. The inverted signal is output from the output terminal in accordance with the on/off operation of the normally-on transistor. The negative-voltage generating unit generates the negative voltage by rectifying a high-frequency power.

Abstract: A gate drive circuit includes: a modulation circuit that generates a first modulated signal and a second modulated signal; an isolator including a first electromagnetic resonance coupler that isolatedly transmits the first modulated signal, and a second electromagnetic resonance coupler that isolatedly transmits the second modulated signal; a first rectifier circuit that generates a first signal by rectifying the first modulated signal; a second rectifier circuit that generates a second signal by rectifying at least a part of the second modulated signal; a third rectifier circuit that generates charging voltage by rectifying a second radio-frequency wave; a capacitor that charges a charge in accordance with the charging voltage; and an output circuit which selects whether or not to supply the charge charged in the capacitor to a gate terminal of the semiconductor switch, in accordance with at least one of the first signal and the second signal.

Abstract: A drive device that drives a semiconductor switching device includes a capacitor, an output selection unit that selects whether or not to supply a charge of the capacitor to a conduction control terminal of the semiconductor switching device, and a charge consumption unit that supplies the charge of the capacitor to a portion other than the conduction control terminal, thereby consuming the charge of the capacitor.

Abstract: A resonance coupler according to one aspect of the present disclosure includes first resonance wiring and second resonance wiring. The first resonance wiring includes first open loop wiring, first input/output wiring extending outwardly from a first connection portion of the first open loop wiring, and first stub wiring extending inwardly from a second connection portion of the first open loop wiring. The second resonance wiring includes second open loop wiring, and second input/output wiring extending outwardly from a third connection portion of the second open loop wiring. The first stub wiring includes a first connection end connected to the second connection portion and a first open end on an opposite side. A wiring length from the first connection portion to the first open end is one-quarter of a wavelength of an nth-order harmonic of a radio-frequency signal, where n is an integer not less than 2.

Abstract: A gate drive circuit in an aspect of the present disclosure includes a modulated signal generation circuit that generates a first modulated signal, a first isolator that isolatedly transmits the first modulated signal, and a first rectifier circuit that generates a first output signal by rectifying the first modulated signal. The first modulated signal includes a first amplitude, a second amplitude larger than the first amplitude, and a third amplitude larger than the second amplitude. The first output signal includes a first output voltage value according to the first amplitude, a second output voltage value according to the second amplitude, and a third output voltage value according to the third amplitude.

Abstract: A signal inverting device generates an inverted signal of an input signal. The device includes a normally-on transistor, a negative-voltage generating unit that generates a negative voltage, and an output terminal. A first terminal of the normally-on transistor is connected to a current source. The output terminal is connected between the first terminal of the normally-on transistor and the current source. The normally-on transistor is turned on/off, by an input of a drive signal to a conduction control terminal of the normally-on transistor. The drive signal is a signal obtained by a synthesis of the input signal and the negative voltage. The inverted signal is output from the output terminal in accordance with the on/off operation of the normally-on transistor. The negative-voltage generating unit generates the negative voltage by rectifying a high-frequency power.

Abstract: A radio-frequency signal reception circuit that detects an input signal includes an input reference terminal, a first input terminal into which a first input signal is input, a second input terminal into which a second input signal is input, an output terminal and output reference terminal from which an output signal is output, a first detector circuit that detects the first input signal and outputs a first output signal, which is a positive-voltage pulse signal, to the output terminal, a second detector circuit that detects the second input signal and outputs a second output signal, which is a positive-voltage pulse signal, to the output reference terminal, and a transistor connected to the input reference terminal and output reference terminal. The input signal includes the first input signal and second input signal. The output signal includes the first output signal and second output signal.

Abstract: A drive device that drives a semiconductor switching device includes a capacitor, an output selection unit that selects whether or not to supply a charge of the capacitor to a conduction control terminal of the semiconductor switching device, and a charge consumption unit that supplies the charge of the capacitor to a portion other than the conduction control terminal, thereby consuming the charge of the capacitor.

Abstract: A high-frequency transmission device includes first and second resonators as ring-shaped wires each having an opening part at a part thereof, first and second input/output terminals each electrically connected to both resonators, a first ground shield formed on a plane different from planes on which both resonators are arranged, a second ground shield formed on a plane different from the planes on which both resonators and the first ground shield are arranged, and first and second ground wires each formed to surround peripheries of both resonators. The ground shields and the ground wires are respectively connected to each other. A dielectric wire is present between both ground wires, and the ground wires are not electrically connected to each other.