Abstract: A breathing sound measurement device includes a measurement section configured to be brought into contact with a skin of a front neck of a subject and measure breathing sound of the subject and a wearing section configured to have a first end connected to the measurement section and have elasticity to extend in a circular arc shape along an outer circumference of the subject's neck. The wearing section has a second end provided with a pressing portion configured to be pressed against a skin of a rear neck opposite a right front neck with respect to a midpoint between right and left halves of the subject's neck.

Abstract: A permittivity measuring method includes measuring a set of phases at sampling frequencies of at least three points in each of a first-half portion and a second-half portion of a phase characteristic of electromagnetic waves that passed through a measurement target, if the mode of the phase changes of both sets of phases belongs to a phase group in which change of the at least three points in the first half and change of at least three points in the second half are both monotonic change, maximal values, or minimal values, calculating the permittivity using the phase slope of the phases in the first-half portion and the phases in the second-half portion, and if the mode of the phase changes does not belong to the phase group, calculating the permittivity by fitting the phases of either the first half or the second half to a quadratic function.

Abstract: Provided is a vibration panel including an inner member, a first outer member, a second outer member, a piezoelectric actuator, an actuator bonding layer, and a filler. The inner member includes first and second main surfaces. The first outer member includes third and fourth main surfaces, the third main surface including a first region and a second region. The second outer member includes fifth and sixth main surfaces, the fifth main surface including a third region and a fourth region. The piezoelectric actuator causes vibration. The actuator bonding layer is disposed between the piezoelectric actuator and the second region and bonds the piezoelectric actuator to the second region. The filler fills a space between the second region and the fourth region and covers the piezoelectric actuator.

Abstract: A vibration generating device 10 includes: a diaphragm 11; and a first piezoelectric actuator 12 and a second piezoelectric actuator 13 attached on an upper surface 11a and a lower surface 11b of the diaphragm 11, respectively, so as to sandwich the diaphragm 11 therebetween in a vicinity of an end surface of the diaphragm 11, wherein, in a top view of the upper surface 11a of the diaphragm 11, the first piezoelectric actuator 12 is disposed at a position shifted with respect to the second piezoelectric actuator 13.

Abstract: Arranged on a surface of a substrate are a patch conductor that radiates an electromagnetic field having been fed, a feed line that feeds the patch conductor with the electromagnetic field having been input, two slits parallel to the feed line on both sides of a connection part of the feed line toward an inner side of the patch conductor, and a ring conductor at a space from the patch conductor with an interposition of a gap to surround an outer periphery of the patch conductor. Accordingly, an electric capacitance can be formed between the patch conductor and the ring conductor, and when achieving impedance matching with the feed line, adjustment can be performed using the size of the ring conductor and the gap.

Abstract: A heat exchanger includes tubes arranged side by side, and a tank connected to ends of the tubes. The heat exchanger performs heat exchange between a first fluid flowing inside the tubes and a second fluid flowing outside the tubes. The heat exchanger includes a closing member disposed inside the tank and partially closing an opening provided at an end of a predetermined tube that is at least one of the tubes. The predetermined tube has a protrusion formed at the end of the predetermined tube. The closing member has an avoiding structure that avoids interference between the protrusion and the closing member.

Abstract: A high-frequency module includes: a chassis which is made of a conductor and which has an internal space; a high-frequency circuit board which is housed in the internal space of the chassis; and a resistive element provided between an inner wall that opposes the high-frequency circuit board among inner walls of the chassis which define the internal space and the high-frequency circuit board.

Abstract: A vibration generating device 90 includes: a housing 30 in a rectangular shape as viewed in a first direction, the housing 30 comprising: a first support portion 31 extending along a first side in a second direction perpendicular to the first direction and; a second support portion 32 extending along a second side opposite to the first side in the second direction; a panel 60 supported by the first support portion and the second support portion; and a piezoelectric element 11 attached to the panel in such a manner as to be shifted in the second direction toward the first side with respect to a central portion of the panel, wherein a width in the second direction of a portion of the panel supported by the first support portion is larger than a width in the second direction of a portion of the panel supported by the second support portion.

Abstract: A heat exchanger includes tubes, a tank, and a prevention plate arranged inside the tank and contacting end surfaces of the tubes to prevent heat medium from flowing into the tubes in a certain region. Flow paths are formed in each tube and arranged in a width direction of the tube. The prevention plate includes a deformable portion elastically deformable by contacting an edge of the opening at a time of inserting the prevention plate into the tank from the opening. The deformable portion of the prevention plate that has been inserted into the tank is restored and receives a reaction force from an inner surface of the tank such that the prevention plate is shifted along the width direction by the reaction force.

Abstract: A semiconductor light-receiving element, includes: a semiconductor substrate; a high-concentration layer of a first conductivity type formed on the semiconductor substrate; a low-concentration layer of the first conductivity type formed on the high-concentration layer of the first conductivity type and in contact with the high-concentration layer of the first conductivity type; a low-concentration layer of a second conductivity type configured to form a PN junction interface together with the low-concentration layer of the first conductivity type; and a high-concentration layer of the second conductivity type formed on the low-concentration layer of the second conductivity type and in contact with the low-concentration layer of the second conductivity type. The low-concentration layers have a carrier concentration of less than 1×1016/cm3. The high-concentration layers have a carrier concentration of 1×1017/cm3 or more.

Abstract: A digital signal process unit includes a first cancel signal generation unit and a second cancel signal generation unit. The first cancel signal generation unit generates, as a first cancel signal component, a cancel signal component corresponding to an image signal included in an analog signal output from a mixer. The second cancel signal generation unit generates, as a second cancel signal component, a cancel signal component corresponding to a leakage signal generated between an input and output of the mixer. The digital signal process unit includes subtractors for subtracting the first cancel signal component and the second cancel signal component from a signal component corresponding to a frequency band divided from an input signal to obtain a digital signal.

Abstract: A multilayer piezoelectric element includes a ceramic base body, a pair of external electrodes, multiple internal electrodes, and surface electrodes. The pair of external electrodes cover a pair of end faces and extend from the pair of end faces along a pair of principal faces and a pair of side faces. The multiple internal electrodes are stacked inside the ceramic base body along the thickness direction, and are connected alternately to one or the other of the pair of external electrodes along the thickness direction. The surface electrodes extend from the pair of external electrodes along the pair of principal faces, and are each divided in the longitudinal direction at a position near, of the pair of external electrodes, the external electrode to which the internal electrode adjacent to the principal face is connected.

Abstract: A semiconductor light-receiving element, includes: a semiconductor substrate; a high-concentration layer of a first conductivity type formed on the semiconductor substrate; a low-concentration layer of the first conductivity type formed on the high-concentration layer of the first conductivity type and in contact with the high-concentration layer of the first conductivity type; a low-concentration layer of a second conductivity type configured to form a PN junction interface together with the low-concentration layer of the first conductivity type; and a high-concentration layer of the second conductivity type formed on the low-concentration layer of the second conductivity type and in contact with the low-concentration layer of the second conductivity type. The low-concentration layers have a carrier concentration of less than 1×1016/cm3. The high-concentration layers have a carrier concentration of 1×1017/cm3 or more.

Abstract: A wide-band analog input signal is converted into a digital output signal on the basis of a band division method without the need for filter circuits. An analog processing block Aj (j=2 to N, where N is an integer) down-converts an analog input signal Sx using a cutoff frequency fj-1 of a channel CHj-1 and A/D-converts an analog signal Saj acquired as a result. A digital processing block Bj doubles the signal strength of a first digital signal S1j acquired by Aj, subtracts a third digital signal S3j-1 of the channel CHj-1 from a second digital signal S2j acquired as a result, up-converts the acquired third digital signal S3j using the cutoff frequency fj-1, and outputs the result to an adder as a channel output signal Syj of a corresponding channel CHj.

Abstract: In an embodiment, an edge extraction method includes: emitting, toward an object, an electromagnetic wave polarized only in one direction perpendicular to a propagation direction; receiving a transmitted electromagnetic wave that has been transmitted through the object, using a receiving antenna; calculating an intensity in the propagation direction of the transmitted electromagnetic wave based on an intensity of the transmitted electromagnetic wave received by the receiving antenna; and obtaining a spatial distribution of the intensity in the propagation direction of the transmitted electromagnetic wave.

Abstract: A vehicle monitor apparatus including a mounting portion mounted on a ceiling surface in a vehicle cabin, a monitor portion including a base supported by the mounting portion, a light guide extending along a periphery of the base, and a spacer interposed between the base and the ceiling surface. The spacer is disposed inside a first area surrounded by the light guide and outside a second area in which the mounting portion is disposed, and composed of an elastic body elastically deformed by a compression force from the ceiling surface when the base is mounted on the ceiling surface through the mounting portion.

Abstract: A high frequency connection structure includes: a waveguide; a ridge coupler constituted by a conductor formed inside one end of the waveguide; a transmission line adjacent to the one end of the waveguide; an inductance adjustment structure which is provided between the ridge coupler and the transmission line and which adjusts ground inductance that is created due to a connection between the ridge coupler and the waveguide; and a wire which connects one end of the ridge coupler on a side of the transmission line and one end of the transmission line with each other.

Abstract: A heat exchanger is configured to exchange heat between a heat medium and an air. The heat exchanger includes a tube through which the heat medium flows therein, and a fin that is formed by bending a metal plate and that is brazed to a surface of the tube. The fin includes a louver. The surface of the tube defines an introducing groove configured to introduce a brazing material melted at brazing from a connecting portion between the tube and the fin to an other portion.

Abstract: A negative capacitance circuit is connected between a drain and a source of the mixer transistor. With this configuration, the negative capacitance circuit is connected in parallel to a parasitic capacitance generated between the drain and the source of the mixer transistor, and the parasitic capacitance can be canceled out in a wide band by the negative capacitance circuit connected in parallel.

Abstract: A distributed mixer is configured of an artificial transmission line of which an input end is connected to an LO terminal and a terminal end is connected to an IF terminal, an artificial transmission line of which an input end is connected to an RF terminal, FETs that perform frequency synthesis of LO signals and RF signals and that are disposed following the artificial transmission lines and of which gates are connected to the artificial transmission line and sources are grounded, a bias circuit that applies gate bias voltage to a terminal end of the artificial transmission line, a terminating resistor that connects the terminal end of the artificial transmission line and a ground, and a plurality of transmission lines provided between the artificial transmission line and a drain of each FET.