Abstract: A diamond sensor unit includes: a diamond having a color center with electron spin; an excitation light irradiation part that irradiates the diamond with excitation light; a first patch antenna that receives electromagnetic waves; an electromagnetic wave irradiation part that irradiates the diamond with the electromagnetic waves received by the first patch antenna; a detection part that detects radiated light radiated from the color center of the diamond after the diamond is irradiated with the excitation light and the electromagnetic waves; and an optical waveguide that transmits the excitation light and the radiated light.

Abstract: A flexible printed circuit board according to an embodiment includes a base film and a first wire. The base film has a first surface. The first wire is disposed on the first surface. The first wire has a first layer and a second layer. The first layer is disposed on the first surface directly or indirectly. The second layer covers the first layer. In the first surface, a first groove is formed next to the first layer in a plan view. The second layer on a side surface of the first layer exists on a bottom surface and a side surface of the first groove.

Abstract: A resin composition for primary coating of an optical fiber contains a photopolymerizable compound containing a difunctional urethane (meth)acrylate and a monofunctional urethane (meth)acrylate, and a photopolymerization initiator, the difunctional urethane (meth)acrylate is a reaction product of a diol, a diisocyanate, and a hydroxyl group-containing (meth)acrylate, and the monofunctional urethane (meth)acrylate is a reaction product of a polyoxyalkylene monoalkyl ether, a diisocyanate, and a hydroxyl group-containing (meth)acrylate, or a reaction product of a polyoxyalkylene monoalkyl ether and an isocyanate group-containing (meth)acrylate.

Abstract: An electromagnetic field analysis method includes generating meshes so that a first mesh is generated in a first region and no mesh or a second mesh is generated in a second region other than the first region in a coplanar waveguide, the coplanar waveguide including a dielectric layer and a conductor pattern having a signal line and reference potential patterns, the first region including the signal line and respective parts of the reference potential patterns and having a constant width in a direction orthogonal to an extending direction of the signal line, the reference potential patterns being spaced away from the signal line and interposing the signal line therebetween, the second mesh having a larger dimension than the first mesh, and performing electromagnetic field analysis on the coplanar waveguide using the meshes.

Abstract: A semiconductor device includes a substrate, a source electrode, a drain electrode, a first gate electrode extending in a first direction and provided between the source electrode and the drain electrode, a second gate electrode provided in a region between the source electrode and the drain electrode positioned in the first direction from the first gate electrode, a gate pad provided so as to dispose the first gate electrode between the gate pad and the second gate electrode, and electrically connected to the first gate electrode, a first gate line provided above the source electrode, a second gate line provided above the source electrode and extending in a second direction that crosses the first direction, and a first guard metal layer provided between the second gate line and the drain electrode, and having at least a portion provided between the drain electrode and the source electrode.

Abstract: An in-vehicle communication system includes a first switching device and a second switching device each configured to relay, via a transmission path, information between a plurality of function units mounted to a vehicle. Upon being supplied with a power source voltage via a power-source-dedicated line from a power source device mounted to the vehicle, the first switching device supplies a power source voltage via the transmission path to one or a plurality of the function units and the second switching device that are connected to the first switching device, and the second switching device extracts a power source voltage from the transmission path, and supplies a power source voltage via the transmission path to one or a plurality of the function units that are connected to the second switching device.

Abstract: An optical fiber ribbon comprises a plurality of optical fibers arranged in parallel and a connecting resin layer containing a ribbon resin for coating and connecting the plurality of optical fibers, wherein each of the plurality of optical fibers has an outer diameter of 220 ?m or less; and the ribbon resin contains a cured product of urethane (meth)acrylate, and an amount of silicon is 5 ppm or more and 80000 ppm or less and an amount of tin is 5 ppm or more and 30000 ppm or less at the surface of the connecting resin layer.

Abstract: In a fiber connection structure with optical connectors according to one embodiment, among m first connector port groups, arrangement orders of colors of a plurality of the optical fibers in (2×j?1)th (j is a natural number satisfying 1?j and 2×j?m) first connector port groups are the same, and among the m first connector port groups, arrangement orders of the colors of the plurality of optical fibers in (2×j)th first connector port groups are the same. The arrangement order of the colors of the plurality of optical fibers in the (2×j)th first connector port group is a reverse order of the arrangement order of the colors of the plurality of optical fibers in the (2×j?1)th first connector port group.

Abstract: A cemented carbide including tungsten carbide grains and a binder phase, in which a total content of the tungsten carbide grains and the binder phase in the cemented carbide is no less than 80 vol %, a content of the binder phase in the cemented carbide is no less than 0.1 vol % and no more than 20 vol %, in a histogram showing distribution of orientation differences between adjacent pairs each consisting of two of the tungsten carbide grains adjacent to each other in the cemented carbide, a first peak is present in a class of the orientation differences of no less than 29.5° and less than 30.5°.

Abstract: An electrically conductive GaAs crystal has an atomic concentration of Si more than 1×1017 cm?3, wherein density of precipitates having sizes of at least 30 nm contained in the crystal is at most 400 cm?2. In this case, it is preferable that the conductive GaAs crystal has a dislocation density of at most 2×10?2 cm2 or at least 1×10?3 cm2.

Abstract: A vehicle-mounted apparatus is a vehicle-mounted apparatus mounted in a vehicle, and includes a measuring unit that measures characteristics of a transmission line in a vehicle-mounted network mounted in the vehicle, and an identifying unit that identifies the transmission line based on the characteristics measured by the measuring unit.

Abstract: A shielded cable includes a first insulated wire including a first central conductor, and a first insulating layer provided around the first central conductor, a second insulated wire including a second central conductor, and a second insulating layer provided around the second central conductor, the second insulated wire being disposed parallel to the first insulated wire, a third insulating layer provided around the first insulated wire and the second insulated wire, a shielding layer provided around the third insulating layer, a drain wire in contact with the shielding layer, and a fourth insulating layer provided around the shielding layer and the drain wire.

Abstract: A network of a new configuration is flexibly constructed while maintaining a stable operation in the network. A management device includes: a detection unit that detects addition of a function unit to a network including one or a plurality of on-vehicle function units; an acquisition unit that acquires function unit information of a new function unit that is the function unit the addition of which has been detected by the detection unit and function unit information of each on-vehicle function unit, each piece of function unit information including information regarding network configuration of a layer lower than an application layer; and a generation unit that, based on the pieces of function unit information acquired by the acquisition unit, generates configuration information of a new network that is the network further including the new function unit.

Abstract: A spot size converter includes a first optical waveguide, and a second optical waveguide. The first optical waveguide has a first tapered portion. The first tapered portion extends in a direction in which the first optical waveguide extends, and is thicker with decreasing distance from an end portion of the first optical waveguide and is thinner with decreasing distance from the second optical waveguide. The second optical waveguide is separated from the first tapered portion and has a second tapered portion. The second tapered portion extends in a direction in which the second optical waveguide extends, and is thinner with decreasing distance from the first tapered portion and is thicker with increasing distance from the first tapered portion.

Abstract: A detection device includes: a monitoring unit configured to monitor a periodic message and an event message as messages in an in-vehicle network, each message having, assigned thereto, identification information of a transmission source and a sequence number; a counter unit configured to change a counter value corresponding to the identification information, when the detection device has received the event message from the in-vehicle network; and a detection unit configured to compare the sequence number with the counter value, based on a result of monitoring, and perform provisional determination for detection of an unauthorized message, based on a result of the comparison. The detection unit performs conclusive determination for detection of the unauthorized message, based on an interval of messages that satisfy a predetermined condition regarding the sequence number, among messages to which the same identification information is assigned, and on a predetermined transmission cycle of the periodic message.

Abstract: A semiconductor photodetector includes an optical absorption layer. The optical absorption layer includes a plurality of unit structures stacked in a first direction, each of the plurality of unit structures includes a laminate and a gallium arsenide antimonide layer, the laminate includes a first gallium arsenide layer including j gallium arsenide monolayers, a first indium arsenide layer including m indium arsenide monolayers, k stacked structures, and a second gallium arsenide layer including (j?1) gallium arsenide monolayers, each of the k stacked structures includes a third gallium arsenide layer including n gallium arsenide monolayers, and a second indium arsenide layer including m indium arsenide monolayers, j, m, and n are each an integer of 1 or more, and k is an integer of 0 or more.

Abstract: A diamond sensor unit includes: a sensor part that includes a diamond having a color center with electron spin; an irradiation part that irradiates the diamond with excitation light; a detection part that detects radiated light from the color center of the diamond; and an optical waveguide that transmits the excitation light, and the radiated light.

Abstract: A semiconductor photodetector includes a first group III-V semiconductor layer of a first conductivity type; a second group III-V semiconductor layer of a second conductivity type; and an optical absorption layer disposed between the first group III-V semiconductor layer and the second group III-V semiconductor layer in a first direction. The optical absorption layer includes a plurality of unit structures stacked in the first direction. Each of the plurality of unit structures includes a gallium arsenide layer, an indium arsenide layer, and a gallium arsenide antimonide layer. The gallium arsenide layer and the indium arsenide layer each have a thickness smaller than a thickness of the gallium arsenide antimonide layer.

Abstract: A flexible printed circuit board includes: a base film having a hole for forming a through hole; and a coil-shaped wiring layer layered on at least one surface side of the base film, wherein the wiring layer includes a land portion arranged at an inner peripheral surface of the hole and at a peripheral portion of the hole of the base film, and a winding portion arranged in a spiral shape with the land portion as an inside end portion or an outside end portion, wherein the winding portion includes a first winding portion that is an outermost circumference and a second winding portion that is inside relative to the outermost circumference, and wherein a ratio of an average thickness of the land portion to an average thickness of the second winding portion is 1.1 or more and 5 or less.

Abstract: An in-vehicle communication device on a transmitting side of a message includes: a delay time measuring unit measuring a delay time from when transmission of a message is first attempted to when the transmission of the message is started; and an assigning unit assigning the delay time measured by the delay time measuring unit to the message. An in-vehicle communication device on a receiving side of a message includes: a reception point acquisition unit acquiring a point in time when a message from the in-vehicle communication device on the transmitting side is received; a delay time acquisition unit acquiring a delay time assigned to the received message; and a calculation unit calculating a transmission cycle of each message based on a point in time acquired by the reception point acquisition unit and a delay time acquired by the delay time acquisition unit for each of two received messages.