Abstract: A high-frequency device includes a metal base, a dielectric substrate mounted on the metal base, an insulator layer provided on the metal base, covering the dielectric substrate, and having a dielectric constant smaller than that of the dielectric substrate, and a first line that overlaps the dielectric substrate as seen from a thickness direction of the insulator layer and is provided on an upper surface of the insulator layer to form a first microstrip line.

Abstract: An in-vehicle communication system includes: an optical coupler; a first in-vehicle device group composed of a plurality of in-vehicle devices connected to a first end of the optical coupler; and a second in-vehicle device group composed of a plurality of in-vehicle devices connected to a second end of the optical coupler. The in-vehicle devices in the first in-vehicle device group are communicable with the in-vehicle devices in the second in-vehicle device group via a common transmission path in the optical coupler. The in-vehicle devices in the second in-vehicle device group are communicable with the in-vehicle devices in the first in-vehicle device group via a common transmission path in the optical coupler.

Abstract: A semiconductor device includes a metal plate having a base portion and a terminal portion separated from the base portion, a resin layer provided between the base portion and the terminal portion and so as to surround the metal plate in a planar direction, and at which an upper and a lower surface of each of the base portion and the terminal portion are exposed, a semiconductor chip mounted on the base portion, a first electrically insulating layer provided on the metal plate and the resin layer so as to cover the semiconductor chip, and one or more wires provided on the first electrically insulating layer and including at least one wire configured to electrically connect the semiconductor chip and the terminal portion to each other.

Abstract: An insulated electric wire includes a conductor formed of a plurality of element wires twisted together, and an insulating layer covering an outer periphery of the conductor. The insulating layer is formed of a crosslinked product of a polymer composition. The polymer composition contains, as a main component, an ethylene-based copolymer, polyethylene, or a combination of an ethylene-based copolymer and polyethylene. The crosslinked product has a gel fraction of 60% or more, and the crosslinked product has a tensile elongation of 150% or more.

Abstract: A method of manufacturing a high-frequency device includes mounting a first chip having a first pillar on an upper surface thereof on a metal base, forming an insulator layer covering the first chip on the metal base, exposing an upper surface of the first pillar from the insulator layer, and forming a first wiring connected to the first pillar on the insulator layer and transmitting a high-frequency signal.

Abstract: An optical wiring includes a plurality of first set groups each including a plurality of first connecting components, a plurality of second set groups each including a plurality of second connecting components, and a receptacle which has a first end face and a second end face on an opposite side of the first end face. The first set groups are connected to the first end face side and the second set groups are connected to the second end face side. The first set groups faces the second set groups through the receptacle such that a direction in which the first connecting components are arranged and a direction in which the second connecting components are arranged are perpendicular to each other, and each of the first connecting components is optically connected to a corresponding one of the second connecting components in the receptacle.

Abstract: An MCF includes a plurality of cores each extending in a direction along a central axis and a cladding covering each of the plurality of cores. The cladding includes a low refractive index barrier. The low refractive index barrier includes an alkali metal element. A relative refractive index of the low refractive index barrier is lower than an average value of a relative refractive indices of the cladding overall. The core interval is set such that a total sum of the power coupling coefficients between a specific core among the plurality of cores and each of all remaining cores is 2.3×10?4/km or less.

Abstract: A method of manufacturing a sintered gear includes preparing a green compact having two gear-shaped end surfaces, one on each of two sides in an axial direction of the green compact, and having a plurality of teeth on an outer peripheral surface formed between the two end surfaces; chamfering an edge of the teeth by a brush; and sintering the green compact. The brush is a wheel-type brush including a disk-shaped wheel and a bristle member radially protruding from an outer periphery of the wheel. The chamfering includes disposing the brush with respect to the green compact such that the axial direction of the green compact and an axial direction of the wheel intersect with each other; bringing a tip of the bristle member into contact with a tooth bottom edge; and relatively moving the brush in a circumferential direction of the green compact while rotating the brush.

Abstract: A method for manufacturing an optical fiber preform includes generating glass particles from a glass raw material gas in a flame obtained by combustion of a combustible gas supplied to a burner and depositing the glass particles on an outer circumference of a silica glass pipe to form a hollow porous glass preform, inserting a rod into the silica glass pipe, transparently vitrifying the porous glass preform by heating the porous glass preform after inserting the rod to obtain a transparent glass preform, drawing out the rod from the silica glass pipe after the porous glass preform is transparently vitrified, and removing the silica glass pipe from the transparent glass preform by etching after drawing out the rod.

Abstract: A vehicle-mounted device to be mounted on a first vehicle includes: a storage unit configured to store an algorithm related to traveling of the first vehicle; an acquisition unit configured to acquire driving environment information related to a driving environment of a second vehicle different from the first vehicle; and a determination unit configured to determine compatibility related to traveling between the driving environment information and the first vehicle, and determine, in accordance with a determination result of the compatibility, whether to provide the algorithm available for the first vehicle to the second vehicle.

Abstract: A cemented carbide composed of a first hard phase, a second hard phase and a binder phase, in which the first hard phase is composed of tungsten carbide particles, the second hard phase is composed of at least one first compound selected from the group consisting of TiNbC, TiNbN and TiNbCN, the second hard phase has an average particle diameter of no more than 0.1 ?m, the second hard phase has a dispersity of no more than 0.7, the second hard phase has a content of no less than 0.1 vol % and no more than 15 vol %, the binder phase contains at least one first element selected from the group consisting of iron, cobalt and nickel, and the binder phase has a content of no less than 0.1 vol % and no more than 20 vol %.

Abstract: A calculation device includes a memory and a processor coupled to the memory. The processor is configured to; in an amplifier circuit including an input terminal to which a radio frequency signal is input, a transistor configured to amplify the input radio frequency signal, an output terminal from which the amplified radio frequency signal is output, and a matching circuit connected between the transistor and the output terminal, calculate a radio frequency characteristic of the amplifier circuit, if the calculated radio frequency characteristic of the amplifier circuit is a desired characteristic, calculate, at least one value of a current value and a voltage value at a predetermined portion within the equivalent circuit, and calculate, the deterioration degree of the electric characteristic of the transistor.

Abstract: A semiconductor optical device includes a substrate formed of silicon and having a first optical waveguide and a semiconductor element formed of a III-V compound semiconductor and having a second optical waveguide, the semiconductor element being bonded to an upper surface of the substrate. The first optical waveguide and the second optical waveguide form a directional coupler.

Abstract: A method for producing a semiconductor optical device includes the steps of bonding a semiconductor chip to an SOI substrate having a waveguide, the semiconductor chip having an optical gain and including a first cladding layer, a core layer, and a second cladding layer that contain III-V group compound semiconductors and are sequentially stacked in this order, forming a covered portion with a first insulating layer on the second cladding layer, etching partway in the thickness direction the second cladding layer exposed from the first insulating film, forming a second insulating film covering from the covered portion to a part of a remaining portion of the second cladding layer, and forming a first tapered portion that is disposed on the waveguide and tapered along the extending direction of the waveguide by etching the core layer and the second cladding layer exposed from the second insulating film.

Abstract: A multi-core fiber module includes a transmission MCF configured to be used as a transmission path for an optical signal, a connection MCF having a core arrangement similar to a core arrangement of a core of the transmission MCF, and a relay lens system interposed between the transmission MCF and the connection MCF. A relay magnification of the relay lens system is equal to a ratio of a core interval of the connection MCF to a core interval of the transmission MCF. A core at a leading end surface of the connection MCF is expanded such that a ratio between the core interval and a mode field diameter of the connection MCF is equal to a ratio between the core interval and a mode field diameter of the transmission MCF.

Abstract: The MCF of the present disclosure suppresses occurrence of structural abnormality such as air bubbles in the vicinity of a boundary between a marker and a cladding. The MCF includes a glass optical fiber including a plurality of cores, a marker, and a cladding, and a resin coating. On a cross section of the MCF, centers of the plurality of cores and a center of the marker constitute a plane figure having a rotational symmetry of order 1 with respect to a center of the cross section. Moreover, on the cross section, the marker is disposed so as to be located on a circumference of a circle having a center coinciding with the center of the cross section and having the circumference passing through the respective centers of the plurality of cores.

Abstract: A pattern generation device includes a memory and a processor coupled to the memory. The processor is configured to generate pattern data corresponding to a pattern of a metal layer based on a generation condition, determine whether the generated pattern data satisfies a predetermined condition, return to generate the pattern data when the predetermined condition is not satisfied, calculate a characteristic of the pattern or an element or circuit having the pattern when a high-frequency signal is inputted to a first portion and a high-frequency signal is outputted from a second portion by performing an electromagnetic field analysis based on the pattern data when the predetermined condition is satisfied, determine whether the calculated characteristic is within a target range, change the generation condition when the calculated characteristic is not within the target range, and return to generate the pattern data after changing the generation condition.

Abstract: A vehicle monitoring program of the present disclosure is a vehicle monitoring program for use in a vehicle-mounted device to be mounted in a vehicle, the program causing a computer included in the vehicle-mounted device to function as: a monitoring unit configured to detect an abnormality of application software used in the vehicle, and an abnormality processing unit configured to, in response to the monitoring unit detecting the abnormality of the application software, select an abnormality process for a measure against the abnormality from among a plurality of abnormality processes in accordance with an adverse effect level of the application software on safe driving of the vehicle.

Abstract: A method for manufacturing an optical fiber includes applying a first resin composition, forming a primary resin layer, applying a second resin composition, and forming a secondary resin layer. An ultraviolet LED used a light source in the forming the primary resin layer and the forming the secondary resin layer. In the forming the primary resin layer, an effective power consumption represented by formula (1) is 0.056 kWs or more and 0.230 kWs or less, ? n = 1 N Bn · ? ? n · tn ( 1 ) where N is a number of light sources, Bn [kW] is a rated power of an n-th light source, ?n is a predetermined rate of power of the n-th light source, and tn [s] is an irradiation time of the n-th light source.

Abstract: An output circuit includes: an inductor, an amplifier circuit that outputs an output signal via the inductor, an output terminal that outputs the output signal to an outside, a voltage divider circuit including a series circuit constituted by a first capacitive element and a second capacitive element connected in series to the first capacitive element, the series circuit generating a first voltage-divided signal by dividing a voltage of the output signal, a first band-adjusting element having a resistance component for generating a first band-adjusted signal by adjusting frequency characteristics of the first voltage-divided signal, and a first peak detection circuit that detects a peak voltage of the first band-adjusted signal and output a first peak voltage in accordance with the detected peak voltage.