Abstract: A method for manufacturing an optical modulator is disclosed. The method includes a step of preparing a Mach-Zehnder modulator, a step of acquiring, based on a light transmittance in an arm waveguide, a relationship between a voltage applied to an electrode and a phase change amount of light propagating through the arm waveguide, a step of acquiring, based on the relationship, a voltage in which the phase change amount of the light propagating through the arm waveguide has a predetermined when the light is modulated, and a step of storing the voltage in a storage unit.

Abstract: A wire harness including: a wire bundle that includes a plurality of wires, each wire of the plurality of wires includes a conductor and an insulating covering that covers an outer circumference of the conductor, and each wire of the plurality of wires includes an exposed portion at which the conductor is exposed from the insulating covering; a splice body; and a waterproofing cover, wherein: at the splice body, the exposed portions of the wires forming the wire bundle are bonded to each other, a portion of the wire bundle that is adjacent to the splice body and at which the conductors are covered by the insulating coverings is a covered region, the waterproofing cover integrally covers the splice body and the covered region with a resin material.

Abstract: An unauthorized message in an in-vehicle network is more accurately detected. A detection device includes: a monitoring unit configured to monitor, as target messages, an authorized message being periodically transmitted and the unauthorized message in the in-vehicle network, and monitor a reference message being periodically transmitted; a calculation unit configured to, based on a monitoring result of the monitoring unit, calculate a time difference between a time corresponding to a transmission time of the target message and a time corresponding to a transmission time of the reference message; and a detection unit configured to, based on the time difference calculated by the calculation unit, perform a detection process of detecting the unauthorized message.

Abstract: A powder magnetic core includes a compact including soft magnetic powder, and an insulating-resin coating that covers a portion of a surface of the compact. A ratio of an area of the insulating-resin coating to a surface area of the compact is lower than or equal to 85%, and a maximum depth of unevenness on a surface of the insulating-resin coating is smaller than or equal to 20 ?m.

Abstract: A multicore cable includes a twisted wire portion including a plurality of Twinax cables and a plurality of coaxial cables, and a shield layer disposed on an outer periphery of the twisted wire portion. The twisted wire portion includes a first twisted wire layer and a second twisted wire layer in a cross section perpendicular to a longitudinal direction of the multicore cable. The first twisted wire layer is closest to the shield layer, and the second twisted wire layer is located on a center side from the first twisted wire layer and is adjacent to the first twisted wire layer. A closest Twinax cable is disposed in the second twisted wire layer. The closest Twinax cable is closest to the shield layer among the plurality of Twinax cables included in the twisted wire portion.

Abstract: A printed wiring board includes a base film having a first surface and a second surface opposite to the first surface, a first electrically conductive pattern existing on the first surface, and a first electrically insulating layer existing on the first surface so as to cover the first electrically conductive pattern. A plurality of first voids exist in the first electrically insulating layer.

Abstract: An in-vehicle device to be mounted in a vehicle, includes: a processing unit configured to generate first key deriving information according to a first scheme, generate first key information by using the first key deriving information, and encrypt a packet by using the first key information; and a communication unit configured to transmit the packet encrypted by the processing unit to another vehicle. After encrypting the packet by using the first key information, the processing unit generates second key deriving information according to a second scheme that has a key information generating time shorter than that of the first scheme, generates second key information by using the second key deriving information, and encrypts a packet to be newly transmitted by the communication unit, by using the second key information instead of the first key information.

Abstract: An insulated electric wire according to one aspect includes at least one linear conductor, and at least one insulating layer layered on the outer peripheral surface of the conductor, wherein the insulating layer contains an olefinic resin and an antioxidant, the content of the antioxidant is more than 1.0 part by mass and 5.0 parts by mass or less per 100 parts by mass of the olefinic resin, and the antioxidant comprises a phenolic antioxidant and a sulfur-based antioxidant except for a sulfur-containing phenolic antioxidant.

Abstract: Provided is a power supply control device for controlling power supply to a motor installed in a vehicle, including: a switching element configured to turn on and off the power supply to the motor; a current detection circuit configured to detect a current flowing to the motor; and a control unit configured to determine whether or not the motor is in a locked state based on the current detected by the current detection circuit, and control turning on and off the power supply to the motor at a duty cycle that corresponds to the current detected by the current detection circuit, if it is determined that the motor is in the locked state.

Abstract: An optical network system includes information processing terminals each including an optical transmitter unit and an optical receiver unit, first optical fibers, first optical transmission lines, second optical fibers, second optical transmission lines, an optical coupling unit, and an optical branching unit. The first optical fibers extend from the respective optical transmitter units of the information processing terminals. The first optical transmission lines are connected to the respective first optical fibers at one ends. The first optical fibers extend from the respective optical receiver units of the information processing terminals. The second optical transmission lines are connected to the respective second optical fibers at one ends. The optical coupling unit couples another ends of the first optical transmission lines to one end of a third optical transmission line.

Abstract: A recycle wafer of silicon carbide has a silicon carbide substrate and a first silicon carbide layer. The silicon carbide substrate has a first main surface and a second main surface opposite to the first main surface. The first silicon carbide layer is in contact with the first main surface. The silicon carbide substrate includes a substrate region that is within 10 ?m from the first main surface toward the second main surface. In a direction perpendicular to the first main surface, a value obtained by subtracting a value that is three times a standard deviation of a nitrogen concentration in the substrate region from an average value of the nitrogen concentration in the substrate region is greater than a minimum value of a nitrogen concentration in the first silicon carbide layer.

Abstract: An antenna module to be provided to a vehicle includes: an array antenna configured to form a beam directed from an aperture provided in an exterior body panel of the vehicle, toward a vehicle outside; and a housing holding the array antenna in a vehicle inside.

Abstract: A connector with cable is provided with a cable including a wire, a sheath and a braided member interposed between the wire and the sheath, the braided member being formed by braiding conductive wire materials, the braided member being provided with a folded portion formed by folding the braided member exposed from an end of the sheath toward the sheath, a sleeve made of metal and externally fit to an outer surface of the sheath inside the folded portion in a radial direction of the cable, a shield member made of metal and including a barrel for sandwiching the folded portion between the sleeve and the barrel while being crimped to an outer surface of the folded portion, and a housing covered with the shield member. A sleeve-side protrusion projecting radially outwardly of the cable is formed on a rear end part of the sleeve.

Abstract: According to one aspect of the present disclosure, a printed circuit board includes: an insulating base film; and a plurality of wiring portions formed on a surface of the base film, wherein the wiring portions include a seed layer that is directly or indirectly layered on the surface of the base film and a metal layer that is layered on the seed layer, wherein the base film has a wiring area including the plurality of wiring portions and a non-wiring area not including the wiring portions, wherein the plurality of wiring portions include at least one outermost boundary wiring portion and a plurality of inner wiring portions other than the outermost boundary wiring portion, wherein the outermost boundary wiring portion is formed on an outermost side of the base film in the wiring area and at a boundary between the wiring area and the non-wiring area, wherein an average width of the outermost boundary wiring portion is 30 ?m or more, wherein an average width of the inner wiring portions is 20 ?m or less, and w

Abstract: A method for manufacturing an intermittently coupled-type optical fiber ribbon includes arranging a plurality of optical fibers in parallel in a direction orthogonal to a longitudinal direction of the plurality of optical fibers, coating all of the plurality of optical fibers with a coupling resin, intermittently inserting a cleaving blade into the coupling resin between some adjacent optical fibers of the plurality of optical fibers to form slits. An outer diameter of each of the optical fibers is 220 ?m or less. A distance between the optical fibers into which the cleaving blade is inserted among the adjacent optical fibers is 10 ?m or more and 100 ?m or less.

Abstract: A vehicle-side connector 1 includes a connector housing 10, a plurality of vehicle-side terminals 50 and heat storage bodies 70. The heat storage body 70 includes a case 71 accommodated in the connector housing 10 and heat storage materials 76 accommodated in the case 71.

Abstract: A rack for storing electrical equipment includes a columnar frame formed by combining a vertical frame and a horizontal frame and a connecting member attached to the horizontal frame. The horizontal frame has a first portion including the connecting member and a second portion other than the first portion. The connecting member is movably attached to the second portion so that an inside of the rack is opened in the first portion.

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: Provided is polycrystalline diamond having a diamond single phase as basic composition, in which the polycrystalline diamond includes a plurality of crystal grains and contains boron, hydrogen, oxygen, and the remainder including carbon and trace impurities; the boron is dispersed in the crystal grains at an atomic level, and greater than or equal to 90 atomic % of the boron is present in an isolated substitutional type; hydrogen and oxygen are present in an isolated substitutional type or an interstitial type in the crystal grains; each of the crystal grains has a grain size of less than or equal to 500 nm; and the polycrystalline diamond has a surface covered with a protective film.

Abstract: An optical connector includes an optical fiber that includes a glass fiber and a resin coating portion, a ferrule that includes a ferrule main body holding the glass fiber and a flange portion fixed to the ferrule main body, a housing that accommodates the ferrule and includes an inner wall surface facing the ferrule, and an elastic member that is accommodated in the housing and applies an elastic force to the ferrule in a longitudinal direction of the housing. The housing is configured to have a space between the inner wall surface and the flange portion, and the housing is configured such that at least a part of the housing including the inner wall surface is deformed in a state where the housing is engaged with the adaptor, and the inner wall surface prevents rotation of the flange portion with respect to the housing.