Abstract: A contactless switch device including a reflected signal acquisition unit that acquires a reflected signal of a Doppler radar or a distance measurement radar, an approach and recede detection unit that detects an approach and a recede of a target based on the reflected signal, a target identification unit that identifies the target as a hand waving left and right, up and down, or back and forth, or a thing other than the hand based on a repeated pattern of the approach and the recede of the target, and a switch control unit that executes on-and-off controls on a switch-controlled object based on whether the target is the hand waving left and right, up and down, or back and forth, or the thing other than the hand.

Abstract: An overboard fall detection unit including: a water environment sensor that is equipped on a ship crewperson and that outputs water environment data around the ship crewperson; an overboard fall detection part that detects an overboard fall of the ship crewperson on the basis of the water environment data; and an overboard fall notification part that transmits a beacon signal that continuously notifies of overboard fall information related to the ship crewperson via one-way communication.

Abstract: A wireless communication unit and a wireless network system enable a plurality of wireless communication units to be wirelessly cooperated with a simple structure, can easily realize cooperative operations, and can execute IP packet transfer control without acquiring communication path information from an external network. A relay wireless communication portion that is connectable to an upstream unit (upstream wireless base station portion) that is another upstream wireless communication unit via an upstream inter-unit wireless bearer is provided. A wireless base station portion is connectable to a downstream unit (downstream relay wireless communication portion) that is another downstream wireless communication unit via a downstream inter-unit wireless bearer.

Abstract: A variable value calculating process includes: measuring a propagation time of the propagation of an ultrasound wave through a measurement sector inside a housing; obtaining a temperature calculated value on the basis of the measured value of the propagation time and a reference distance for the measurement sector; obtaining a temperature measured value by measuring the temperature inside the housing; and obtaining a temperature replacement fluctuation value indicating a difference between the temperature calculated value and the temperature measured value. The variable value calculating process is executed for each of a plurality of temperature conditions under which the temperature of a reference gas inside the housing differs. A temperature compensation table in which the temperature of a gas to be measured is associated with a temperature compensation value relating to the temperature is obtained on the basis of the temperature replacement fluctuation values obtained under each temperature condition.

Abstract: A gas concentration measurement device comprises: a transmission circuit and a transmission oscillator for transmitting first ultrasonic waves in a concentration measurement space and transmitting second ultrasonic waves, which continue temporally from the first ultrasonic waves in the concentration measurement space; a reception oscillator and a reception circuit for receiving the ultrasonic waves that have propagated through the concentration measurement space; and a propagation time measurement unit for determining, on the basis of the times at which the first ultrasonic waves and the second ultrasonic waves were transmitted and the times at which the first ultrasonic waves and the second ultrasonic waves were received, the time in which ultrasonic waves propagate through the concentration measurement space.

Abstract: An electron gun comprising a cathode having an electron emitting surface and whose planar shape is circular, a heater to increase the temperature of the cathode, and an anode to apply a positive electric potential relative to the cathode to extract electrons in a predetermined direction is provided. The cathode comprises a through hole at a central portion thereof along a central axis of the cathode, and either the cathode comprises a no-emitting layer at at least one of an opening edge on the electron emitting surface side of the through hole and an inner surface of the through hole, or the opening edge on the electron emitting surface side of the through hole is a chamfered C surface or a chamfered R surface.

Abstract: Provided is a biochemical reaction substrate which can achieve higher test sensitivity and shorter testing time in an allergy test, which can also reduce a required amount of blood or the like needed as a specimen and decrease the number of test steps, thereby facilitating performance of the test, and which is to be used in an allergy test in which infection risk of the test staff is reduced.

Abstract: A processor is configured to include a correlation object determination unit for establishing: a first to-be-correlated signal established on the basis of a first upper-limit rate of change, which is the rate of change of an upper-limit envelope of a direct wave signal, and a first lower-limit rate of change, which is the rate of change of a lower-limit envelope of the direct wave signal; and a second to-be-correlated signal established on the basis of a second upper-limit rate of change, which is the rate of change of an upper-limit envelope of a round-trip-delayed wave signal, and a second lower-limit rate of change, which is the rate of change of a lower-limit envelope of the round-trip-delayed wave signal. The processor is also configured to include a correlation processing unit for establishing a correlation value between the first to-be-correlated signal and a signal based on the second to-be-correlated signal.

Abstract: The present invention is aimed to provide, as an acoustic lens propagating a sonic wave having a wavelength ? of 100 ?m or less, an acoustic lens capable of exhibiting excellent acoustic characteristics in response to the wavelength ? of the sonic wave to be propagated and a production method thereof. The acoustic lens is an acoustic lens 1 to be used for propagating a sonic wave having a wavelength ? of 100 ?m or less, wherein the acoustic lens contains a silicone resin and silica particles, an average primary particle diameter of the silica particles is 15 nm or more, and a particle diameter (D90) of 90% of a cumulative percentage in cumulative particle size distribution of the silica particles is less than ? of the wavelength ? of the sonic wave to be propagated.

Abstract: An electron gun comprising a cathode having an electron emitting surface and whose planar shape is circular, a heater to increase the temperature of the cathode, and an anode to apply a positive electric potential relative to the cathode to extract electrons in a predetermined direction is provided. The cathode comprises a through hole at a central portion thereof along a central axis of the cathode, and either the cathode comprises a no-emitting layer at at least one of an opening edge on the electron emitting surface side of the through hole and an inner surface of the through hole, or the opening edge on the electron emitting surface side of the through hole is a chamfered C surface or a chamfered R surface.

Abstract: The present invention provides a backing material having an excellent attenuation effect of acoustic wave vibration, a method of producing the same, and an acoustic wave probe provided with the backing material. The backing material includes a resin and a magnetized particle, in which the magnetized particle has a magnetic flux density of 1,000 to 15,000 gauss.

Abstract: A switching power supply device includes a switching transistor, a sense resistor, a transformer, an optocoupler, and a current limiting feedback circuit. The switching transistor is controlled to be turned on and turned off. The sense resistor is configured to generate a sense voltage when the switching transistor is turned-on. The transformer includes a primary winding to which an input voltage is applied when the switching transistor is turned-on, a secondary winding is configured to supply an output voltage to a load, and an auxiliary winding that is configured to detect the output voltage. The optocoupler is configured to generate first and second optocoupler currents corresponding to the output voltage. The current limiting feedback circuit is configured to generate first, second, and third feedback currents using a voltage of the auxiliary winding, the first, second, and third feedback currents being in inverse proportion to the output voltage.

Abstract: The present invention is aimed to provide, as an acoustic lens propagating a sonic wave having a wavelength ? of 100 ?m or less, an acoustic lens capable of exhibiting excellent acoustic characteristics in response to the wavelength ? of the sonic wave to be propagated and a production method thereof. The acoustic lens is an acoustic lens 1 to be used for propagating a sonic wave having a wavelength ? of 100 ?m or less, wherein the acoustic lens contains a silicone resin and silica particles, an average primary particle diameter of the silica particles is 15 nm or more, and a particle diameter (D90) of 90% of a cumulative percentage in cumulative particle size distribution of the silica particles is less than ? of the wavelength ? of the sonic wave to be propagated.

Abstract: An electron gun comprising a cathode having an electron emitting surface and whose planar shape is circular; a heater; an anode being arranged to oppose the cathode; and a heat resistant member. The anode applies a positive potential relative to the cathode to extract electrons in a predetermined direction. The cathode has, in a central portion thereof, a through hole along a central axis of the cathode. The heat resistant member has a first portion to close the through hole and a second portion being positioned between the cathode and the heater.

Abstract: A self-oscillating piezoelectric actuator drive circuit includes a integrating circuit; an inverter (INV1), inverters (INV2 and INV3) inverting an output signal of the inverter (INV1), sense resistors (Rs1 and Rs2) connected to output sides of the inverters (INV2 and INV3), a positive feedback resistor (Rfb2) feeding back an output signal of the inverters (INV2 and INV3) to the integrating circuit; and a negative feedback resistor (Rfb1) feeding back a voltage generated from the sense resistors (Rs1 and Rs2, Rs1<Rs2 in terms of a resistance value) to the integrating circuit. In a startup state, the sense resistor (Rs2) and the inverter (INV3) are selected, and in an operating state after the startup state, the sense resistor (Rs1) and the inverter (INV2) are selected.

Abstract: An electron gun comprising a cathode having an electron emitting surface and whose planar shape is circular; a heater; an anode being arranged to oppose the cathode; and a heat resistant member. The anode applies a positive potential relative to the cathode to extract electrons in a predetermined direction. The cathode has, in a central portion thereof, a through hole along a central axis of the cathode. The heat resistant member has a first portion to close the through hole and a second portion being positioned between the cathode and the heater.

Abstract: According to one embodiment, a constant-voltage power supply circuit includes: an error amplifier including an inverting input terminal and a noninverting input terminal, a reference voltage source connected with the inverting input terminal of the error amplifier, an output transistor, the transistor having a source connected with a power supply terminal, a drain connected with a circuit output terminal, and a gate connected with an output terminal of the error amplifier, and an output voltage detecting circuit, the circuit being connected between the circuit output terminal and a power supply terminal, detecting voltage of the circuit output terminal to apply the detected voltage to the noninverting input terminal of the error amplifier. The constant-voltage power supply circuit further includes a positive feedback circuit connected between the output terminal of the error amplifier and the gate of the output transistor.

Abstract: A power supply circuit includes an output transistor which adjusts an input voltage and generates an output voltage, an error amplifier which generates a control voltage for the output transistor according to a difference between a feedback voltage corresponding to the output voltage and a reference voltage, an overcurrent protection circuit which controls the error amplifier according to a result of monitoring the control voltage and controls the control voltage so as to drop the output voltage, and an undershoot detection circuit Which detects an undershoot of the output voltage and controls the control voltage for the output transistor so as to suppress the output voltage from dropping.

Abstract: Provided is a constant current drive circuit that can improve accuracy of a stop timing of quick charge and prevent an overshoot, an insufficient quick charge, and the like from occurring. The constant current drive circuit includes a resistor R5 connected between the output side of the gm amplifier 6 and the input side of the transistor M1. The comparator 9 serving as a charge stopping circuit includes a voltage Vof, and stops charging by the quick charge circuit 8 based on a comparison result of the voltage Vof and the voltage Vs2 generated in the resistor R5.