Abstract: A measurement system includes a measurement device including a light source, and a first power meter, and one or a plurality of connection members each configured to optically connect a pair of optical fiber lines of the plurality of optical fiber lines. A first optical fiber line of the pair of optical fiber lines includes a first end and a second end, a second optical fiber line of the pair of optical fiber lines includes a third end and a fourth end, the one or plurality of connection members optically connect the second end to the fourth end, the light source causes testing light to be incident on the first end, and the first power meter measures first intensity of first output light output from the third end by causing the testing light to propagate through the pair of optical fiber lines.

Abstract: A suspension arm includes a main body. The main body includes a curved portion curved along a longitudinal direction and has a closed section. The main body includes an inner side wall, an outer side wall, a first side wall, and a second side wall. The inner side wall corresponds to an inner side of a curve of the curved portion. The outer side wall corresponds to an outer side of the curve of the curved portion. A thickness of the inner side wall is larger than a thickness of the outer side wall. In sectional view of the main body perpendicular to the longitudinal direction, each of a length of the first side wall and a length of the second side wall is longer than each of a length of the inner side wall and a length of the outer side wall.

Abstract: An optical fiber cable includes an optical fiber bundle including optical fibers and a protective member having a cylindrical shape and defining an internal space where the optical fiber bundle is accommodated. The optical fiber bundle being a single optical fiber bundle is accommodated in the internal space. The protective member includes a first cylindrical portion having a ring-shaped first cut and a second cylindrical portion having a second cut corresponding to the first cut, the second cylindrical portion being spaced from the first cylindrical portion. An end of a first optical fiber included in the optical fibers is pulled out to outside of the protective member from between the first cylindrical portion and the second cylindrical portion.

Abstract: Provided is a burring processing method, which is a method for forming a buffing processed portion including a raised portion and a curved portion in a metal component having a pilot hole formed therein, the method being characterized by including: a preforming step of enlarging a diameter of the pilot hole, moving an edge portion of the pilot hole relative to the metal component in a first direction of a thickness direction of the metal component in a first range around the pilot hole of the metal component, and forming the whole first range into a preformed portion raised from the metal component in the first direction; and a main forming step of deforming the preformed portion in a second direction opposite to the first direction, forming a second range on an outer diameter side of the preformed portion to have the same height as the first range in the first direction, and forming part of a third range on an inner diameter side of the preformed portion from the second range to be part of the curved portion

Abstract: An optical fiber ribbon includes a plurality of optical fiber cores arranged in parallel in a direction orthogonal to a longitudinal direction of the optical fiber cores, and a coupling member configured to couple the plurality of optical fiber cores. In the optical fiber ribbon, a plurality of coupled sections and a plurality of separate sections are alternately provided in the longitudinal direction. Each of the plurality of coupled sections is in a state in which all of the adjacent optical fiber cores are coupled by the coupling member. Each of the plurality of separate sections is in a state in which at least two of the optical fiber cores adjacent to each other are not coupled by the coupling member.

Abstract: An optical connection structure including first optical fibers, second optical fibers, a first optical connector, and a second optical connector is disclosed. The first optical connector is configured such that each of first distal end portions of the first optical fibers protrudes from a first front end surface to the outside when the first optical connector and the second optical connector are connected to each other. Each of the first distal end portions is inserted into a corresponding second fiber hole of the second optical connector. The second optical connector is configured such that each of second distal end portions of the second optical fibers is moved rearward inside second fiber holes due to each of the first distal end portions respectively inserted into the second fiber holes. The first optical fibers and the second optical fibers are optically coupled to each other inside the second fiber holes.

Abstract: A steel sheet for hot stamping includes, as a chemical composition, by mass %: C: 0.060% to 0.120%; Si: 0% to 0.70%; Mn: 1.60% to 3.00%; P: 0.100% or less; S: 0.0100% or less; N: 0.0100% or less; Al: 0.001% to 0.100%; Ti: 0.005% to 0.050%; and B: 0.0005% to 0.0100%. If necessary, the chemical composition contains one or two or more selected from the group consisting of Nb, V, W, Ni, Cu, Mo, Sn, Ca, Mg, and REM and a remainder of Fe and impurities, A microstructure includes 70% or more of upper bainite by area ratio, and a number density of iron carbides having a major axis of 0.01 ?m or more included in the upper bainite is equal to or greater than 4/?m2.

Abstract: A steel sheet has a predetermined chemical composition, in which a metallographic structure in a surface layer region ranging from a surface to a position of 20 ?m from the surface in a sheet thickness direction consists of ferrite and a secondary phase having a volume fraction of 1.0% to 15.0%, the metallographic structure in an internal region ranging from a position of more than 20 ?m from the surface in the sheet thickness direction to a ¼ thickness position from the surface in the sheet thickness direction consists of ferrite and a secondary phase having a volume fraction of 5.0% to 25.0%, the volume fraction of the secondary phase in the surface layer region is less than the volume fraction of the secondary phase in the internal region, and in the surface layer region, the average grain size of the secondary phase is 0.5 ?m to 4.0 ?m.

Abstract: An optical connection structure including first optical fibers, second optical fibers, a first optical connector, and a second optical connector is disclosed. The first optical connector is configured such that each of first distal end portions of the first optical fibers protrudes from a first front end surface to the outside when the first optical connector and the second optical connector are connected to each other. Each of the first distal end portions is inserted into a corresponding second fiber hole of the second optical connector. The second optical connector is configured such that each of second distal end portions of the second optical fibers is moved rearward inside second fiber holes due to each of the first distal end portions respectively inserted into the second fiber holes. The first optical fibers and the second optical fibers are optically coupled to each other inside the second fiber holes.

Abstract: A wiring module includes: a bottom plate; a module having two surfaces facing each other; a plurality of optical fibers, each of which is connected to the module via at least one of the surfaces of the module; and a plurality of reels which are sequentially stacked on an upper surface of the bottom plate, each of the plurality of reels accommodating a bundle of one corresponding optical fiber among the plurality of optical fibers. The module is disposed in a space formed inside the plurality of reels which are stacked.

Abstract: A burring processing method including increasing a diameter of a prepared hole provided in a metal component and bending a part of the metal component to form a burring processed portion (110) including an upright portion (120) and a curved portion (130), wherein in a cross-section that passes through an axis (cb) of the burring processed portion (110) and is parallel to the axis (cb) of the buffing processed portion (110), a cross-sectional shape of the curved portion (130) on an inner surface of the curved portion consists of a curve, and a length of the curved portion (130) in a direction perpendicular to the axis (cb) of the burring processed portion (110) is at least 1.2 times a height of the curved portion in a direction parallel to the axis (cb) of the burring processed portion (110).

Abstract: An optical communication system comprises N server racks, first and second distribution frames, and first and second optical fiber cables. Each of the first and second optical fiber cables has N optical connector groups for racks and an optical connector group for distribution frame including M optical connectors. The closer the number of an optical connector of the M optical connectors is to the last number, the longer a wiring distance from the optical connector group for distribution frame to a corresponding optical connector group of the N optical connector groups for racks in the first optical fiber cable. The closer the number of an optical connector of the M optical connectors is to the last number, the shorter a wiring distance from the optical connector group for distribution frame to a corresponding optical connector group of the N optical connector groups for racks in the second optical fiber cable.

Abstract: An optical fiber cable includes a plurality of first optical fiber codes including a trunk optical fiber code and a branch optical fiber code, a second optical fiber code connected to the branch optical fiber code, and a case covering a part of the plurality of first optical fiber codes and a part of the second optical fiber code, where the case includes a first tube portion through which a trunk optical fiber code is passed, a second tube portion adjacent to the first tube portion and through which a branch optical fiber code is passed, and a partition wall partitioning the first tube portion and the second tube portion.

Abstract: An optical fiber cable includes a plurality of optical fiber codes and a trunk section in which the plurality of optical fiber codes are bundled in a cross section honeycomb shape, and each optical fiber code included in the plurality of optical fiber codes is separably connected to at least one of other optical fiber codes adjacent to the optical fiber code in the trunk section.

Abstract: An objective of the present disclosure is to provide a front pillar outer that is inexpensive, lightweight and strong. A front pillar outer includes a glass-face-side flange part, a door-side flange part, and a main body part that connects the glass-face-side flange part and the door-side flange part to each other. In a partial area of the door-side flange part in a longitudinal direction thereof, a first plate part that is connected to a side edge of the door-side flange part is folded so that the first plate part is overlaid on the door-side flange part. In a partial area of the glass-face-side flange part in a longitudinal direction thereof, a second plate part that is connected to a side edge of the glass-face-side flange part is folded so that the second plate part is overlaid on the glass-face-side flange part.

Abstract: An optical connection structure including first optical fibers, second optical fibers, a first optical connector, and a second optical connector is disclosed. The first optical connector is configured such that each of first distal end portions of the first optical fibers protrudes from a first front end surface to the outside when the first optical connector and the second optical connector are connected to each other. Each of the first distal end portions is inserted into a corresponding second fiber hole of the second optical connector. The second optical connector is configured such that each of second distal end portions of the second optical fibers is moved rearward inside second fiber holes due to each of the first distal end portions respectively inserted into the second fiber holes. The first optical fibers and the second optical fibers are optically coupled to each other inside the second fiber holes.

Abstract: An objective of the present invention is to provide a front pillar outer that has high strength and high rigidity. In an area in which the first door-side flange part and a second door-side flange part overlap with each other, the first door-side flange part and the second door-side flange part are joined to each other. In an area in which the first glass-face-side flange part and the second glass-face-side flange part overlap with each other, the first glass-face-side flange part and the second glass-face-side flange part are joined to each other.

Abstract: The present invention provides a hot-stamping formed article made of steel, in which the hot-stamping formed article has at least one of a tensile strength of 1200 MPa or more and a martensitic steel structure and includes a first portion, a corner portion, and a second portion, which are sequentially continuous from one end portion to the other end portion in a longitudinal direction, each of the first portion, the corner portion, and the second portion includes a top sheet and two vertical walls connected to the top sheet when viewed in a cross section perpendicular to the longitudinal direction, the second portion includes a first outwardly-extending flange adjacent to the vertical wall, and the corner portion includes a vertical flange extending from the vertical wall of the first portion, a second outwardly-extending flange adjacent to the vertical wall located on an outer peripheral side of the corner portion out of the two vertical walls, and a transition portion in which the vertical flange and the se

Abstract: A hot-stamping formed article is formed of a single steel sheet, and includes: a top sheet portion; a pair of standing wall portions; and a protrusion portion which connects the top sheet portion to the standing wall portion and protrudes outward from the top sheet portion, in which the protrusion portion includes an inner wall portion which stands upright from the top sheet portion, and an outer wall portion which is folded outward from an end edge of the inner wall portion, and an angle between the top sheet portion and the protrusion portion is 80° to 90°.

Abstract: A stiffened panel structure includes a panel-shaped component and a wire. The panel-shaped component has a panel body that curves in such a manner as to be convex outward. The wire has a first end portion and a second end portion. The first end portion is bonded to a first point on the inner surface of the panel body. The second end portion is bonded to a second point on the inner surface of the panel body. The wire is strained between the first point and the second point.