Abstract: A multilayer substrate includes a multilayer body including first insulator layers and a second insulator layer stacked on each other. The multilayer body includes first and second regions when viewed in a stacking direction. The first region is a region that does not include the second insulator layer when viewed in the stacking direction. The second region is a region that includes the second insulator layer when viewed in the stacking direction. The first insulator layers include a small-area first insulator layer located in the first region and not located in the second region. The small-area first insulator layer overlaps the second insulator layer when viewed in a first direction. A porosity of the second insulator layer is higher than an overall porosity of the first insulator layers.

Abstract: A multilayer substrate includes a multilayer body including insulation layers stacked on top of one another in an up-and-down direction. The insulation layers include a porous insulation layer. The multilayer substrate includes a first region and a second region. A dimension of the porous insulation layer in the up-and-down direction is smaller in the first region than in the second region. An average void size of the porous insulation layer is smaller in the first region than in the second region, and/or the porous insulation layer is denser in the first region than in the second region.

Abstract: A transmission line includes an element body, a signal conductor layer, and a ground conductor layer. The element body includes an insulator layer. The signal conductor layer is below the insulator layer, and the ground conductor layer is above the insulator layer in an element body up-down direction. A hole is located at a surface of the insulator layer and penetrates the insulator layer in the element body up-down direction. At least a portion of the hole overlaps the signal conductor layer when viewed in the element body up-down direction. The hole extends between a left hole-defining surface and a right hole-defining surface. In a cross section orthogonal to the element body front-back direction, the left hole-defining surface includes a left upper end and a left lower end in the element body left-right direction, and the right hole-defining surface includes a right upper end and a right lower end in the element body left-right direction.

Abstract: In a transmission line, a multilayer body includes a hollow portion above a signal conductor layer and below a ground conductor layer and overlapping the ground conductor layer when viewed in an up-down direction, and a spacer facing the hollow portion. In a cross section orthogonal to a front-back direction, an overlapping region is a region in the hollow portion in which the hollow portion overlaps the spacer in the up-down direction. In a cross section orthogonal to the front-back direction, a non-overlapping region is a region in the hollow portion in which the hollow portion does not overlap the spacer in the up-down direction. A length of the hollow portion in the up-down direction in the overlapping region is shorter than a length of the hollow portion in the up-down direction in the non-overlapping region.

Abstract: In a transmission line, a signal conductor layer extends in a front-back direction orthogonal to an up-down direction. A ground conductor layer is above the signal conductor layer. When viewed in a first orthogonal direction, first hollow portions are arranged in the front-back direction in a first direction of the signal conductor layer, and second hollow portions are arranged in the front-back direction in a second direction of the signal conductor layer. Each of regions between adjacent first hollow portions in the front-back direction is a first region. Each of regions between adjacent second hollow portions in the front-back direction is a second region. Each of the first hollow portions overlaps with a corresponding one of the second regions when viewed in a second orthogonal direction. Each of the second hollow portions overlaps with a corresponding one of the first regions when viewed in the second orthogonal direction.

Abstract: In a transmission line, a hollow portion overlaps a first ground conductor layer in an up-down direction. In a first orthogonal direction, the hollow portion includes a first portion extending in a second orthogonal direction of a signal conductor layer. In the first portion, a portion at which a width of the first portion in the second orthogonal direction has a first portion maximum width value is a first portion maximum width portion. A portion at which the width of the first portion in the second orthogonal direction has a first portion minimum width value is a first portion minimum width portion. A portion at which the width of the first portion in the second orthogonal direction has a first portion intermediate width value is a first portion intermediate width portion located between the first portion maximum width portion and the first portion minimum width portion in the front-back direction.

Abstract: A multilayer substrate module includes a first substrate portion including a first substrate portion body including first insulator layers stacked in a vertical direction and a first conductor layer and/or a first interlayer connection conductor provided at the first substrate portion body. A second substrate portion includes a second substrate portion body including second insulator layers stacked in the vertical direction and a second conductor layer and a second interlayer connection conductor provided at the second substrate portion body, and is mounted on an upper surface of the first substrate portion. A mount device is mounted on an upper surface or a lower surface of the second substrate portion. At least a portion of an inductance component is defined by the first conductor layer and the first interlayer connection conductor.

Abstract: A resin multilayer substrate includes a multilayer body including resin base-material layers laminated in a thickness direction and a circuit conductor therein, an end-surface ground conductor provided directly on each end surface of the multilayer body in the thickness direction, an adhesion layer on a side surface of the multilayer body, and a side-surface ground conductor on the adhesion layer. The end-surface and side-surface ground conductors are made of a ground conductor material with a coefficient of thermal expansion whose difference from a coefficient of thermal expansion of the resin base-material layers in a plane direction is smaller than a difference from a coefficient of thermal expansion of the resin base-material layers in the thickness direction. The adhesion layer is made of a material with higher adhesiveness to the side surface of the multilayer body than adhesiveness of the ground conductor material.

Abstract: A transmission line component includes an insulation substrate, signal line conductors, and a common-mode choke coil. The insulation substrate is made of a flexible material, and has a shape extending in a first direction. The signal line conductors are on or in the insulation substrate, and extend mainly in the first direction. The common-mode choke coil includes linear conductors on or in the insulation substrate, and is connected to the signal line conductors. The insulation substrate includes a first signal line portion in which the signal line conductors are provided, and a coil portion in which the common-mode choke coil is provided in the first direction. The insulation substrate includes a bent portion in the first signal line portion.

Abstract: A thermoelectric conversion element module (101) includes: a heat receiving part (3) disposed so as to be contactable with a heat source; a thermoelectric conversion element (10) having a first surface (10a) and a second surface (10b), the first surface (10a) being disposed in contact with the heat receiving part (3); and a heat radiating part (5) that is disposed in contact with the second surface (10b) and has an inner space (21).

Abstract: A thermoelectric conversion element module (101) includes: a heat receiving part (3) disposed so as to be contactable with a heat source; a thermoelectric conversion element (10) having a first surface (10a) and a second surface (10b), the first surface (10a) being disposed in contact with the heat receiving part (3); and a heat radiating part (5) that is disposed in contact with the second surface (10b) and has an inner space (21).

Abstract: A device for calculating a pulse period of a living body. The device includes a maximum value detecting unit that detects a maximum value of a biological signal received at a predetermined time interval, a peak value determining unit that determines whether the maximum value is a peak value of the biological signal detected by the maximum value detecting unit during a fixed time period, a calculating unit that calculates a rhythmic pulse period of a living body generating the biological signal based on a time interval between successive peak values of the biological signal; and a fixed time period changing unit that changes the fixed time period to a predetermined time period that corresponds to the time interval between the successive peak values of the biological signal.

Abstract: An electronic device includes a storage that stores therein pulse rate ranges using a resting heart rate of a user as a reference to be associated with exercise amounts, respectively, and a processor. The processor executes a process including: acquiring a first sensor value and a second sensor value from a first sensor and a second sensor that are sensors worn on a body of the user, respectively, the first sensor detecting pulses and the second sensor detecting an acceleration; calculating a plurality of pulse rate candidates based on the acquired first sensor value; calculating an exercise amount of the user based on the acquired second sensor value; and specifying a pulse rate range stored in the storage to be associated with the calculated exercise amount and deciding a pulse rate candidate included in the specified pulse rate range as a pulse rate of the user.

Abstract: An amplifier circuit includes first and second amplification units. A first detection electrode and a high impedance circuit are connected to the input terminal of the first amplification unit. A second detection electrode and a high impedance circuit are connected to the input terminal of the second amplification unit. The output terminals of the first and second amplification units output first and second output signals, and are connected to the input terminals of a differential amplifier circuit through coupling capacitors, respectively. The differential amplifier circuit operates a difference between the first and second output signals in a state where a direct-current component is omitted.

Abstract: A pulse wave detection device that includes a piezoelectric transducer acquiring the velocity pulse wave of a test subject and an information processing unit that processes the acquired velocity pulse wave and selectively detects regular velocity pulse wave data. The information processing unit acquires a differential waveform, extracts the extreme value of the velocity pulse wave, calculates the area value of a domain surrounded by the differential waveform and a reference line, compares the previous value and the current value of the extreme value with each other with respect to the velocity pulse waves chronologically adjacent to each other when the area value is greater than or equal to a predetermined value, and determines that the two velocity pulse waves are regular velocity pulse wave data when a difference between the two extreme values is less than or equal to a predetermined value.

Abstract: A device for calculating a pulse period of a living body. The device includes a maximum value detecting unit that detects a maximum value of a biological signal received at a predetermined time interval, a peak value determining unit that determines whether the maximum value is a peak value of the biological signal detected by the maximum value detecting unit during a fixed time period, a calculating unit that calculates a rhythmic pulse period of a living body generating the biological signal based on a time interval between successive peak values of the biological signal; and a fixed time period changing unit that changes the fixed time period to a predetermined time period that corresponds to the time interval between the successive peak values of the biological signal.

Abstract: A pulse wave detection device that includes a piezoelectric transducer acquiring the velocity pulse wave of a test subject and an information processing unit that processes the acquired velocity pulse wave and selectively detects regular velocity pulse wave data. The information processing unit acquires a differential waveform, extracts the extreme value of the velocity pulse wave, calculates the area value of a domain surrounded by the differential waveform and a reference line, compares the previous value and the current value of the extreme value with each other with respect to the velocity pulse waves chronologically adjacent to each other when the area value is greater than or equal to a predetermined value, and determines that the two velocity pulse waves are regular velocity pulse wave data when a difference between the two extreme values is less than or equal to a predetermined value.