Abstract: [Problem] To provide an optical transmission/reception device, an optical communication system, an optical communication method, and a program which are capable of securing the confidentiality of information included in an optical signal even when the optical signal is transferred to a device that is not an original transmission destination device.

Abstract: Provided is a flap valve device and a gas liquid separation device provided with a flap valve. The flap valve device includes a main body having an opening, a flap for selectively closing the opening and a torsion coil spring provided between the main body and the flap for biasing the flap in an opening direction. The flap valve device further comprises a main body side bearing; a flap side bearing; a connecting member including a hinge shaft passed through the main body side bearing, the flap side bearing and the torsion coil spring, and an extension extending from an end of the hinge shaft along an outer part of the flap; and a spring engagement portion provided on the main body for engaging an end of the torsion coil spring; another end of the torsion coil spring being engaged by the extension, which is engaged on the flap.

Abstract: In order to provide an extended branch device in which construction work is easy and communication is not significantly affected by construction work, and a method for controlling the extended branch device, the extended branch device of the present invention is provided with: a first branch unit provided with a first port coupled to a first terminal station, a second port coupled to a second terminal station, a third port, a fourth port, and a switch for coupling the first port with the second or third port and coupling the second port with the fourth port; and a first separation unit provided with a fifth port coupled to the third port, a sixth port coupled to the fourth port, and a seventh port coupled to a third terminal station, the first separation unit outputting, from the sixth port, an optical signal having a first wavelength among the optical signals inputted from the fifth port, and outputting, from the seventh port, an optical signal having a second wavelength among the optical signals inputted fr

Abstract: [Problem] To provide an optical transmission/reception device, an optical communication system, an optical communication method, and a program which are capable of securing the confidentiality of information included in an optical signal even when the optical signal is transferred to a device that is not an original transmission destination device.

Abstract: Provided is a flap valve device and a gas liquid separation device provided with a flap valve wherein the flap valve device is highly compact, and is easy to assemble.

Abstract: A front vehicle body structure includes a bumper face that extends in a vehicle width direction and a license base that is formed separately from the bumper face and fixed to the bumper face. The license base includes a main body which allows a license plate to be attached to a front surface thereof, a leg portion that extends rearward from a rear surface of the main body, and a hinge portion that extends downward from a rear end of the leg portion and is capable of being bent upward. The license base is fixed to the bumper face by engaging the hinge portion that has been bent upward with the bumper face.

Abstract: A front vehicle body structure includes a bumper face that extends in a vehicle width direction and a license base that is formed separately from the bumper face and fixed to the bumper face. The license base includes a main body which allows a license plate to be attached to a front surface thereof, a leg portion that extends rearward from a rear surface of the main body, and a hinge portion that extends downward from a rear end of the leg portion and is capable of being bent upward. The license base is fixed to the bumper face by engaging the hinge portion that has been bent upward with the bumper face.

Abstract: An air guide structure for guiding outside air in front of the vehicle to equipment to be cooled. Ai air guide duct structure (20) is provided with: left and right side-wall ducts (46, 68) provided to the left and right sides of equipment (16) to be cooled; and left and right seal sections (47, 69) protruding from the inner wall surfaces (46a, 68a) of the left and right side-wall ducts toward the equipment (16) to be cooled. The left and right seal sections (47, 69) are spaced by a predetermined distance (S1) from the equipment (16) to be cooled toward the front of the vehicle body. Air pressure during the travel of the vehicle elastically deforms the right and left seal sections (47, 69) to cause the seal sections to make contact with the equipment (16) to be cooled.

Abstract: A front vehicle body structure includes, on each of left and right sides, a front side frame, an upper member, a frame connecting member, an impact absorbing mechanism. The impact absorbing mechanism has a closed cross-sectional shape in frontal view of a vehicle. The impact absorbing mechanism includes an external wall and an internal wall. The external wall is substantially straight with respect to an upper internal wall of the upper member such that the frame connecting member is disposed therebetween. The internal wall has a shape in which at least a front portion of the internal wall between a central portion of the internal wall in its longitudinal direction and the bumper beam is obliquely bent outward.

Abstract: A vehicle body front structure is disclosed, wherein a large engine can be installed even if the entire vehicle body length is kept compact, and an impact load can be efficiently absorbed. In a vehicle body front structure (10), internal and external extension members (41, 42) protruding forward are provided to the front ends of left and right front side frames (11, 12) and the front ends of left and right upper members (13, 14) via a mounting plate (35). In the mounting plate, internal mounting parts (51) and front walls (68) of the internal extension members are inclined farther toward the front of the vehicle body nearer the center of the vehicle width direction.

Abstract: A front vehicle body structure includes, on each of left and right sides, a front side frame, an upper member, a frame connecting member, an impact absorbing mechanism. The impact absorbing mechanism has a closed cross-sectional shape in frontal view of a vehicle. The impact absorbing mechanism includes an external wall and an internal wall. The external wall is substantially straight with respect to an upper internal wall of the upper member such that the frame connecting member is disposed therebetween. The internal wall has a shape in which at least a front portion of the internal wall between a central portion of the internal wall in its longitudinal direction and the bumper beam is obliquely bent outward.

Abstract: An air guide structure for guiding outside air in front of the vehicle to equipment to be cooled. Ai air guide duct structure (20) is provided with: left and right side-wall ducts (46, 68) provided to the left and right sides of equipment (16) to be cooled; and left and right seal sections (47, 69) protruding from the inner wall surfaces (46a, 68a) of the left and right side-wall ducts toward the equipment (16) to be cooled. The left and right seal sections (47, 69) are spaced by a predetermined distance (51) from the equipment (16) to be cooled toward the front of the vehicle body. Air pressure during the travel of the vehicle elastically deforms the right and left seal sections (47, 69) to cause the seal sections to make contact with the equipment (16) to be cooled.

Abstract: A vehicle body front structure is disclosed, wherein a large engine can be installed even if the entire vehicle body length is kept compact, and an impact load can be efficiently absorbed. In a vehicle body front structure (10), internal and external extension members (41, 42) protruding forward are provided to the front ends of left and right front side frames (11, 12) and the front ends of left and right upper members (13, 14) via a mounting plate (35). In the mounting plate, internal mounting parts (51) and front walls (68) of the internal extension members are inclined farther toward the front of the vehicle body nearer the center of the vehicle width direction.