Abstract: A vapor chamber has a working fluid in an internal space formed between a first metal sheet and a second metal sheet, in which the first metal sheet includes a recessed channel and at least one projecting part. The recessed channel is provided at an inner surface of the first metal sheet; the projecting part projects from the inner surface of the first metal sheet toward the second metal sheet, and a top face of the projecting part abuts the second metal sheet. The vapor chamber includes at least one top face joining part and gap flow channel part, the top face joining part joins part of the top face of the projecting part and the second metal sheet, and the top face and the second metal sheet are separated at the gap flow channel part.

Abstract: Provided herein is an example heat sink including a heat dissipation unit including a plurality of heat dissipation fin groups including a plurality of heat dissipation fins, the plurality of heat dissipation fin groups forming a laminated structure and a plurality of heat pipes, one end portions of which are thermally connected to a heating element and other end portions of which are inserted into a space provided between the plurality of heat dissipation fin groups forming the laminated structure and thermally connected to the heat dissipation unit.

Abstract: The communication system in an embodiment includes a server apparatus. The server apparatus includes a controller that issues an instruction for executing priority control when a priority vehicle passes through a place where a roadside unit is installed. The priority control prioritizes a first communication performed by the priority vehicle via the roadside unit over a second communication performed by anything other than the priority vehicle via the roadside unit.

Abstract: A semiconductor laser device includes: a main body including a first layer having n-type conductivity, a second layer having p-type conductivity, and an active layer interposed between the first layer and the second layer, the first layer, the second layer, and the active layer being laminated in a lamination direction; a front-side mirror formed on a front facet of the main body, the front facet being parallel to the lamination direction; and a rear-side mirror formed on a rear facet of the main body, the rear facet facing the front facet in an optical waveguide direction that crosses the lamination direction and the front facet. The first layer includes an electric field control layer having a shorter composition wavelength than an emission wavelength of the active layer. The second layer includes an optical guide layer having a shorter composition wavelength than the emission wavelength of the active layer.

Abstract: There are provided: an aluminum alloy substrate for a magnetic disk, the aluminum alloy substrate including an aluminum alloy including 0.4 to 3.0 mass % of Fe and the balance of Al and unavoidable impurities, in which second phase particles having a longest diameter of 0.5 ?m or more and less than 2.0 ?m are dispersed at a distribution density of 5000 particles/mm2 or more; a method for producing the same; and a magnetic disk using the aluminum alloy substrate for a magnetic disk.

Abstract: An optical fiber includes: a core portion made of glass; a cladding portion that is located on an outer periphery of the core portion and that is made of glass having a lower refractive index than a refractive index of the core portion; and a coating portion that covers an outer periphery of the cladding portion. Further, an average value of a relative refractive-index difference of a center core of the core portion is 0.1 to 0.5%, a fiber diameter including the coating portion is equal to or smaller than 220 ?m, an effective cutoff wavelength is longer than 1260 nm and smaller than 1530 nm, and a mode field diameter of light at 1550 nm is equal to or larger than 9 ?m.

Abstract: A method of producing a heat-resistant crosslinked fluororubber formed body, including: step (1) melt-mixing, with respect to 100 mass parts of base rubber containing 60 to 99 mass % of fluororubber and 1 to 40 mass % of ethylene-based copolymer resin modified with unsaturated carboxylic acid, 0.003 to 0.5 mass parts of organic peroxide, 0.5 to 400 mass parts of inorganic filler, 2 to 15 mass parts of silane coupling agent, and silanol condensation catalyst, in which the step (1) includes, step (a) melt-mixing all or part of the base rubber, the organic peroxide, the inorganic filler and the silane coupling agent at a temperature equal to or higher than a decomposition temperature of the organic peroxide, and step (b) melt-mixing a remainder of the base rubber, and the silanol condensation catalyst, to melt-mix the thus-modified ethylene-based copolymer resin in at least one of the steps (a) and (b).

Abstract: An optical module includes: photoelectric elements including first terminal groups; an integrated circuit including second terminal groups and ground terminals; a carrier substrate; a housing; and a common ground pad. Further, the carrier substrate is fixed to one surface of the housing, the carrier substrate includes signal wiring parts and a ground wiring part, the ground wiring part includes terminal pattern parts, a common pattern part, and a coupling part, each of the terminal pattern parts being disposed between the corresponding signal wiring parts and electrically connected with one of the ground terminals, the common pattern part being disposed on a side where the common ground pad is provided on the carrier substrate, the coupling part electrically connecting each terminal pattern part and the common pattern part, and the ground terminals of the integrated circuit are electrically connected with the common ground pad through the ground wiring part.

Abstract: An optical fiber includes: a core portion; a side core layer surrounding a circumference of the core portion; and a cladding portion surrounding a circumference of the side core layer. Relations, ?1 > ?Clad > ?2 and 0 > ?2, hold, where ?1 denotes an average maximum relative refractive-index difference of the core portion with respect to an average refractive index of the cladding portion, ?2 denotes a relative refractive-index difference of an average refractive index of the side core layer with respect to the average relative refractive index of the cladding portion, and ?Clad denotes a relative refractive-index difference of the average refractive index of the cladding portion with respect to pure quartz glass, ?1 is 0.24% or more and 0.30% or less, ?2 is -0.27% or more and -0.08% or less, (?1 - ?2) is 0.36% or more and 0.57% or less.

Abstract: An optical module includes: a casing in which light is propagated; a heating portion; a device arranged inside the casing and configured to change, when heated, characteristics of the light propagated inside the casing; and a first member thermally connected to the heating portion and the device, the first member including a hollow arranged in a heat transfer path from the heating portion to the device and configured to prevent convective heat transmission to an inside of the casing.

Abstract: An optical fiber includes: a central core portion; an intermediate layer; a trench layer; and a cladding portion. Further, relationships ?1>?2>?3 and 0>?3 are satisfied, where ?1, ?2, and ?3 are a relative refractive-index difference of the central core portion, the intermediate layer, and the trench layer, respectively, with respect to the cladding portion, ?1 is equal to or larger than 0.34% and equal to or smaller than 0.37%, |?3| is equal to or larger than 0.1% and equal to or smaller than 0.25%, ?1×|?3| is equal to or smaller than 0.08%2, a mode field diameter at a wavelength of 1310 nm is equal to or larger than 8.8 ?m, and a transmission loss at a wavelength of 1550 nm is equal to or smaller than 0.195 dB/km.

Abstract: An optical fiber includes: a central core portion; an intermediate layer; a trench layer; and a cladding portion. Further, ?1>?2>?3 and 0>?3 are satisfied, where ?1 is a relative refractive-index difference of the central core portion, ?2 is a relative refractive-index difference of the intermediate layer, and ?3 is a relative refractive-index difference of the trench layer with respect to the cladding portion, respectively, and (c?b) is smaller than 4.5 ?m when ?1 is equal to or larger than 0.36% and equal to or smaller than 0.40%, ?2 is equal to or larger than ?0.05% and equal to or smaller than 0.05%, |?3| is equal to or smaller than 0.25%, ?1×|?3| is equal to or smaller than 0.08%2, an inner diameter of the trench layer is 2b, and an outer diameter of the trench layer is 2c.

Abstract: A mask-integrated surface protective tape, containing: a substrate film; a temporary-adhesive layer provided on the substrate film; and a mask material layer provided on the temporary-adhesive layer; wherein the mask material layer and the temporary-adhesive layer each contain a (meth)acrylic copolymer; and wherein the mask-integrated surface protective tape is used for a method of producing a semiconductor chip utilizing a plasma-dicing.

Abstract: An optical fiber includes: a core portion made of glass; and a cladding portion made of glass, having a refractive index lower than the refractive index of the core portion, and positioned on an outer periphery of the core portion. Further, the cladding portion has an outer diameter smaller than 100 ?m, and the core portion has a relative refractive-index difference of 0.32% to 0.40% with respect to the cladding portion.

Abstract: A ring member is disposed on a ring member mounting position. The ring member mounting position is a region between a pair of locking walls and is formed in a straight pipe shape. The ring member is in a substantially C shape with an opening at a part of its circumferential direction. The ring member may also be formed in a ring shape being connected at ring member joint parts. The ring member includes a reduced diameter part and first click parts protruding from the reduced diameter part substantially parallel in the pipe axial direction to form a slide guide. The ring member also includes second click parts of which outer diameters expand gradually from the reduced diameter part toward their tip ends. A male fitting part and a female fitting part are fitted with each other using the above ring member to obtain an electrical conduit.

Abstract: An electric power converter includes: an electric power conversion unit configured to convert electric power that has been input, and output the converted electric power; and a control unit configured to control, based on a reference function, an electric power conversion characteristic of the electric power conversion unit, wherein the reference function includes plural droop functions that have been defined according to input values, have drooping characteristics different from one another, and have been connected to each other, and the control unit is configured to control the electric power conversion characteristic by control schemes that are different from one another and are according to the drooping characteristics of the droop functions.

Abstract: A light source includes: a seed light source configured to output incoherent seed light with a predetermined bandwidth; and a booster amplifier that is a semiconductor optical amplifier configured to optically amplify the seed light input from a first facet, and output the amplified seed light as amplified light from a second facet, wherein the first facet and the second facet of the booster amplifier are subjected to a reflection reduction treatment, the booster amplifier is configured to operate in a gain saturated state, and relative intensity noise (RIN) and ripple are simultaneously suppressed in the amplified light.

Abstract: A structured catalyst for steam reforming of the present disclosure is used for producing reformed gas containing hydrogen from a reforming raw material containing hydrocarbon, and includes a support having a porous structure constituted of a zeolite-type compound, and at least one catalytic substance present inside the support. The support includes channels connecting with each other, and the catalytic substance is metal nanoparticles and present at least in the channels of the support.

Abstract: A laser processing method of laser processing a workpiece made of at least one sheet of metallic foil includes: generating laser light by supplying pulsed pumping energy to a laser medium, the laser light including an optical pulse component and a continuous light component that is continuous with the optical pulse component and temporally after the optical pulse component; irradiating a surface of the workpiece with the laser light; and limiting duration of the continuous light component such that a ratio of energy of the continuous light component to energy of the optical pulse component is equal to or less than a predetermined value.

Abstract: An optical fiber manufacturing method includes: a drawing step of heating one end portion of an optical fiber preform to melt and deform the one end portion and drawing an optical fiber, wherein in the drawing step, drawing is performed while applying pressure to a melted-deformed portion that is melted and deformed.