Abstract: A polyolefin resin composite material, containing: a polyolefin resin; and 10 to 150 parts by mass of cellulose fibers with respect to 100 parts by mass of the polyolefin resin, wherein an area of aggregates of the cellulose fibers is less than 20,000 ?m2; and a method of producing the same.

Abstract: A welding method includes: forming a workpiece by stacking plated sheet members having a plating layer formed on a surface of a base material; disposing the workpiece in an area to be irradiated with laser light; irradiating a surface of the workpiece with a plurality of beams by dispersing positions such that centers of the beams do not overlap with each other within a prescribed area on the surface; while continuing the irradiation, relatively moving the beams and the workpiece and sweeping the beams on the workpiece so as to melt an irradiated part of the workpiece for performing welding; and setting a distance between the beams to be emitted such that weld pools formed in the workpiece by irradiation of each of the beams overlap with each other.

Abstract: A semiconductor optical element includes a semiconductor layer portion that includes an optical waveguide layer. The semiconductor layer portion contains a first impurity having a function of suppressing atomic vacancy diffusion and a second impurity having a function of promoting atomic vacancy diffusion, between a topmost surface of the semiconductor layer portion and the optical waveguide layer. The semiconductor layer portion includes two or more regions that extend in a deposition direction. At least one of the two or more regions contains both the first impurity and the second impurity. The two or more regions have different degrees of disordering in the optical waveguide layer achieved through atomic vacancy diffusion and different band gap energies of the optical waveguide layer.

Abstract: A transition portion (4) has a surface (14) that is formed extending upward. The surface (14) is a surface formed extending upward so as to face a bottom portion (6a). Specifically, the transition portion (4) has a cross-sectional shape in which upper edge portions of side portions (8a) are bent inward. As the surface (14) approaches a main terminal body (3) from a sealing portion (22), the surface (14) gradually separates away from the bottom portion (6a) and the edge portions of the surface (14) gradually open outward and connect to side portions (8b) of the main terminal body (3). The surface (14) is formed so as to be curved upward, in a cross-section, from the end portion of the sealing portion (22).

Abstract: Following the cylindrical bend processing of the shape crimping portion corresponding part corresponding to the crimping section in the sheet-shaped terminal base material, the high bending-rate processing process of bend processing at a bending rate higher than a bending rate for plastically deforming at least a part of a deformation portion to be plastically deformed in a predetermined bend processing shape in the crimping portion corresponding part, and the shaping process of shaping the crimping portion corresponding part into the cylindrical crimping section are performed in this order.

Abstract: A rotatable connector device includes a fixed-side member which is to be fixed, and a rotatable-side member which is relatively rotatably attached to the fixed-side member. The rotatable-side member receives a rotation input. The rotatable connector device have a fixed-side cable end accommodation section, projecting from an outer circumferential surface of the fixed-side member in a tangential direction thereof, for accommodating and holding a terminal conductor connection section provided at an end of a flat cable accommodated in the rotatable connector device. The flat cable has a bent portion, in a portion thereof on a side of the terminal conductor connection section, for bending the flat cable so as to shift the portion on the side of the terminal conductor connection section in a width direction of the flat cable.

Abstract: The invention provides a PLC-type DP-QPSK demodulator that reduces connection loss between a polarization beam splitter and a 90-degree hybrid circuit and aims at reducing the manufacturing cost and an optical transmission system using the same. In an embodiment of the invention, a PLC-type DP-QPSK demodulator that receives a DP-QPSK signal includes one PLC chip having a planar lightwave circuit. Input ports and output ports of signal light are provided at an input end and at an output end of the PLC chip, respectively. Within the planar lightwave circuit, there are integrated a polarization beam splitter that splits the DP-QPSK signal into an X-polarization QPSK signal and a Y-polarization QPSK signal, and two 90-degree hybrid circuits that mix the X-polarization QPSK signal and local oscillation light and the Y-polarization QPSK signal and local oscillation light, respectively, split each QPSK signal into orthogonal components I, Q and output them.

Abstract: Surface 27 of molten metal within a mold is constantly monitored by camera 25. Camera 25 records the surface from an obliquely upward position of the mold in an area that does not affect the casting process. Various analyzing frames such as analysis band 35, molten metal pattern 37, and injection monitoring part 43, are set with respect to the information recorded by the camera 25. The analysis band 35 includes the surface (molten metal part 31c), and is set to a predetermined width so that the direction of surface change is in the longitudinal direction. The width of the analysis band 35 is set as wide as possible in a range that does not block the discharge part (molten metal part 31a). Inside the analysis band 35, the rate of change of the binary data is calculated by the analyzing part.

Abstract: A surface emitting laser includes a lower semiconductor multilayer mirror formed of a plurality of pairs of a high-refractive-index area and a low-refractive-index area; an active layer vertically sandwiched by cladding layers; a current confinement layer of AlzGa1-zAs having an oxide area in a peripheral portion of the current confinement layer, where 0.95?z?1; and an upper semiconductor multilayer mirror formed of a plurality of pairs of a high-refractive-index area and a low-refractive-index area. The low-refractive-index area of at least one of the lower semiconductor multilayer mirror and the upper semiconductor multilayer mirror includes an Alz1Ga1-z1As layer with a thickness thinner than that of the current confinement layer, where z?z1.

Abstract: A seating sensor is provided on a seat back part and/or a seat cushion part of a seat in use for a vehicle such as an automobile, and calculates physical conditions, such as a height and weight of an occupant, to judge whether the subject on the seat is a human or an object. On the basis of the results of such calculation and judgement, the operation of an air bag is controlled. The seating sensor includes a sensing element which is variable in its electric resistance in response to the pressure variation, and the pressing force is detected on the basis of the variation of the electric resistance value.

Abstract: A distributed feedback semiconductor laser device including an active layer, a diffraction grating disposed in a vicinity of the active layer and having a substantially uniform space period and a distributed feedback function, and a functional layer disposed in a vicinity of the diffraction grating and the active layer and having a function of controlling a refractive index of the active layer, whereby the functional layer controls a lasing wavelength of the active layer. The functional layer of controlling the refractive index of the distributed feedback semiconductor laser device can generate a plurality of the lasing wavelengths different among one another and easily controllable.

Abstract: This invention provides a method of manufacturing an optical connector including the steps of obtaining an optical connector having a fiber insertion hole, inserting an optical fiber into the fiber insertion hole of the optical connector such that the fiber end face of the optical fiber is exposed, and polishing the fiber end face of the optical fiber with a grindstone made by mixing cerium oxide abrasive grains and at least one type of abrasive grains selected from the group consisting of chromium oxide abrasive grains, zirconia abrasive grains, and alumina abrasive grains.