Abstract: A secondary battery including a positive electrode, a negative electrode, and an electrolytic solution. The negative electrode includes a carbon material electrochemically capable of absorbing and releasing lithium ions, and a solid electrolyte covering at least part of a surface of the carbon material and having lithium ion conductivity. The solid electrolyte includes a first compound represented by a general formula: LixM1Oy, where 0.5<x?9, 1?y<6, and the M1 includes at least one element selected from the group consisting of B, Al, Si, P, Ti, V, Zr, Nb, Ta, and La. The electrolytic solution includes a solvent and a lithium salt, and the solvent contains at least water.

Abstract: A high-pressure hydrogen tank includes a metal circular cylinder configured to store high-pressure hydrogen therein, a cap part configured to cover each of opposite end portions of the metal circular cylinder, an outer cylinder surrounding an outer periphery of a circular-cylindrical portion of the metal circular cylinder, and a fastening part configured to fix the cap part to the outer cylinder.

Abstract: There are provided a distance acquisition unit (115) that detects a separation distance between a flight vehicle (V1) and a platform (51), a remaining amount acquisition unit (113) that acquires a remaining amount of a drive battery (16), a radio field intensity acquisition unit (114) that acquires a radio field intensity of a reception signal received by a communication unit (12), and a return control unit (112) that performs control to cause the flight vehicle (V1) to return to the platform (51) in at least one of a case where the remaining amount of the drive battery (16) falls below a lower limit remaining amount determined by the separation distance or a case where the radio field intensity falls below a lower limit intensity.

Abstract: A laser beam generation device includes power supply units, LD modules, a combiner, and a control device. The LD modules receive currents from the power supply units, and output laser beams. The combiner collects the laser beams and outputs one laser beam. The control device generates control signals such that power of the laser beam becomes a laser output setting value and such that the currents become current command values. Phases of pulses of the control signals are shifted from each other by 60 degrees.

Abstract: A device may include a first substrate provided with a first through hole. A device may include a second substrate arranged adjacent to the first through hole and configured to partially overlap with the first substrate on a second side of the first substrate. A device may include a vibration layer arranged adjacent to and overlap with the first substrate on a first side of the first substrate opposite the second substrate and configured to stride across the first through hole. A device may include a resin layer disposed to overlap with a portion of the vibration layer overlapping with the first substrate. A device may include a first pad electrode. A device may include a second pad electrode. A device may include the first pad electrode and the second pad electrode being disposed on a surface of the resin layer opposite from the vibration layer.

Abstract: A MEMS device is provided that includes a piezoelectric element including a piezoelectric membrane including a ferroelectric and configured to vibrate based on an application of a voltage. A device may include a diode portion electrically connected in parallel to the piezoelectric element and including a diode.

Abstract: A hydrogen supply system is configured to supply hydrogen to a fuel-cell vehicle by using a receptacle for hydrogen transport, and includes: a filling unit provided at a hydrogen filling facility and configured to fill the receptacle with hydrogen; a management unit configured to calculate a transport timing at which the hydrogen-filled receptacle is transported to a business facility that operates the fuel-cell vehicle; a transport unit configured to transport the hydrogen-filled receptacle to the business facility in accordance with the transport timing; and a disposition unit configured to dispose the hydrogen-filled receptacle transported to the business facility at a place to which the fuel-cell vehicle is capable of accessing to have a refill of the hydrogen in the business facility.

Abstract: A filter device having a pass band and a stop band on a lower frequency side than the pass band includes a filter having a pass band including the pass band, a series arm resonator connected in series to the filter, a first inductor directly connected in series to the series arm resonator, and a parallel arm resonator connected between a node on a path connecting the filter and the series arm resonator and the ground. The parallel arm resonator constitutes a resonance circuit having a resonant frequency at which an attenuation pole corresponding to a high frequency end of the first stop band, and the series arm resonator and the inductor constitute a resonance circuit having an anti-resonant frequency on a lower frequency side than the pass band and having a sub-resonant frequency higher than a resonant frequency of the resonance circuit.

Abstract: A first filter is a hybrid filter including an acoustic wave filter, a plurality of first inductors, and a plurality of first capacitors. A high frequency module further includes a metal electrode layer covering at least part of a resin layer and at least part of an outer peripheral surface of a mounting substrate. Among a plurality of inductors including the plurality of first inductors of the first filter and a plurality of second inductors of a second filter, at least one inductor (the second inductor) is a circuit element including a conductor pattern portion formed in the mounting substrate. The shortest distance between the outer peripheral surface of the mounting substrate and a signal terminal (a third signal terminal) connected to the circuit element is longer than the shortest distance between the outer peripheral surface of the mounting substrate and the circuit element.

Abstract: A power feeding system 1 includes a floating body 11 having power and a control function and an unmanned aerial vehicle 21 that observes environmental information using the floating body 11 as a base, in which the floating body 11 includes a power feeding device 12 that moves in a space below a top surface of the floating body 11 with reference to one of a plurality of planes arranged in a lattice shape on the floating body 11, roughly specifies a position of the unmanned aerial vehicle 21 in two dimensions based on a reflectance of an emitted radio wave, estimates and calculates a power feeding position of the unmanned aerial vehicle 21 based on a reflectance of an output light beam reflected on a reflector attached to a back surface corresponding to a power receiving position of the unmanned aerial vehicle 21, and feeds the unmanned aerial vehicle 21 with power at the power feeding position.

Abstract: A synchronization system for synchronizing phases of alternating currents supplied from a plurality of power supply devices includes a master unit that outputs a synchronization signal having a predetermined period. Each power supply device includes: a power supply circuit that supplies an alternating current to a power feeding line; and a power supply control unit that receives the synchronization signal and controls the power supply circuit. The power supply control unit calculates an adjusted phase by delaying a phase of the received synchronization signal by an amount corresponding to a prescribed delay time and advancing the delayed phase by an amount corresponding to a time required to transmit the synchronization signal from the master unit to the power supply control unit, and controls the power supply circuit in such as manner as to synchronize the phase of the alternating current with the adjusted phase.

Abstract: An acoustic device includes an acoustic MEMS device. An acoustic path communicates with the acoustic MEMS device. Ultrasound generated by vibration of the acoustic MEMS device can resonate in the acoustic path. An ultrasonic transducer has sound pressure frequency characteristics such that sound pressure peaks occur as a result of a combination of resonance of the acoustic MEMS device and resonance in the acoustic path. A relationship of about 5?(f0?fl)/f0×100?about 33 is satisfied, where f0 represents a resonance frequency of the acoustic MEMS device and fl represents a frequency lower than the resonance frequency and closest to the resonance frequency among frequencies at which the sound pressure peaks occur in the sound pressure frequency characteristics.

Abstract: An acoustic device includes a substrate including a first surface and a second surface facing a side opposite to the first surface, an opening, an acoustic MEMS element fixed to the first surface to cover the opening, an annular electrode surrounding the opening on the second surface, and a solder resist layer covering the second surface adjacently to the annular electrode on an outer side and an inner side of the annular electrode The solder resist layer includes a first cutaway portion to connect a first portion and a second portion to each other, the first portion being any portion in an edge of the annular electrode the second portion being any portion in an edge of the substrate.

Abstract: A past disaster information storage section (28) that stores disaster information related to a disaster that has occurred in the past and a disaster information acquisition section (32) that acquires current disaster information related to a disaster that has occurred this time are included. A disaster prediction section (35) that predicts future disaster information caused by a disaster that has occurred this time on the basis of current disaster information acquired by the disaster information acquisition section (32) and past disaster information stored in the past disaster information storage section (28), and a display control section (37) that displays an image in which the current disaster information and the future disaster information are superimposed are further included.

Abstract: A charger includes a power regulator that regulates power supplied from a power supply and outputs the power to a power storage device, a current detector that detects a battery current supplied to the power storage device, a voltage detector that detects a battery voltage, a controller that performs feedback control over the power regulator based on the battery current and the battery voltage, a feedback signal generator that generates, based on the battery current and the battery voltage, a power feedback signal usable for constant current control and constant voltage control, and a feedback calculator that generates, based on a difference between a command value and the power feedback signal, a control signal to control the power regulator.

Abstract: A high-frequency module includes a mounting substrate, a filter, and a common inductor. The mounting substrate includes a first main surface and a second main surface facing each other. The filter includes series arm resonators and parallel arm resonators, and is disposed on the first main surface. The mounting substrate includes a ground terminal on the second main surface. A first end of the common inductor is connected to all of the parallel arm resonators. A second end of the common inductor is connected to the ground terminal.

Abstract: A radio-frequency circuit includes a first switch, a first filter, a second filter, a third filter, and a fourth filter. The first switch is capable of selectively connecting a first selection terminal or a second selection terminal to a first common terminal. The first filter and the second filter are connected to the first selection terminal. The third filter and the fourth filter are connected to the second selection terminal. The first filter and the third filter are band pass filters. The second filter is a band elimination filter. A pass band of the first filter and a rejection band of the second filter overlap each other. The pass band of the first filter and a pass band of the third filter overlap each other.

Abstract: A synchronization system for synchronizing phases of alternating currents supplied from a plurality of power supply devices includes a master unit that outputs a synchronization signal having a predetermined period. Each power supply device includes: a power supply circuit that supplies an alternating current to a power feeding line; and a power supply control unit that receives the synchronization signal and controls the power supply circuit. The power supply control unit calculates an adjusted phase by delaying a phase of the received synchronization signal by an amount corresponding to a prescribed delay time and advancing the delayed phase by an amount corresponding to a time required to transmit the synchronization signal from the master unit to the power supply control unit, and controls the power supply circuit in such as manner as to synchronize the phase of the alternating current with the adjusted phase.

Abstract: A multiplexer includes a first matching circuit having one end connected to a common terminal; a first filter that has one end connected to the other end of the first matching circuit and the other end connected to a first terminal; a second matching circuit having one end connected to the common terminal; a second filter that has one end connected to the other end of the second matching circuit and the other end connected to a second terminal; and a third filter that has one end connected to the common terminal and the other end connected to a third terminal. The first matching circuit includes a first inductor connected on a first signal path in the first matching circuit. The second matching circuit includes a second inductor connected between a second signal path in the second matching circuit and ground.

Abstract: In a radio-frequency module, a hybrid filter includes an acoustic wave filter including at least one acoustic wave resonator, an inductor having a winding portion, and a capacitor. A plurality of outer electrodes of the acoustic wave filter includes a first input and output electrode connected to a first signal terminal, a second input and output electrode connected to a second signal terminal, and a ground electrode connected to a ground terminal. The inductor is disposed on a first major surface of a mounting substrate and is adjacent to the acoustic wave filter in plan view in a thickness direction of the mounting substrate. When viewed in a direction of a winding axis of the winding portion of the inductor, an inner part of the winding portion in the inductor does not overlap any of the first input and output electrode, the second input and output electrode, and ground electrode.