Abstract: Provided are: a photon detection light-receiving device with which it is possible to avoid malfunctions caused by the application of high voltages, and to shorten the delays in communication time in mesh-type network communication; and a communication apparatus equipped with the photon detection light-receiving device. The photon detection light-receiving device has a photon detection APD, a quenching resistor and a capacitor, with one end of the quenching resistor and one end of the capacitor being connected to one terminal of the photon detection APD.

Abstract: A network capable of 1:n communication in an optical wireless mesh network is provided. An optical wireless communication network communication system A1 comprises an optical wireless communication network communication system A1 comprising: an optical transmitter Ti and an optical receiver Ri, and an optical fiber cable or a coaxial cable for transmitting a signal received by the optical receiver Ri to the optical transmitter Ti at each node, wherein the n+1 node Ni is connected by a network, the optical wireless communication transceiver Si at each node Ni is capable of transmitting simultaneously to all the optical wireless communication transceivers Sj of the other n nodes Nj when its own node Ni and all of the other n nodes Nj satisfy a predetermined condition, and can be received simultaneously from all the optical wireless communication transceivers Sj of the other n nodes Nj.

Abstract: Provided are: a photon detection light-receiving device with which it is possible to avoid malfunctions caused by the application of high voltages, and to shorten the delays in communication time in mesh-type network communication; and a communication apparatus equipped with the photon detection light-receiving device. The photon detection light-receiving device has a photon detection APD, a quenching resistor and a capacitor, with one end of the quenching resistor and one end of the capacitor being connected to one terminal of the photon detection APD.

Abstract: A network capable of 1:n communication in an optical wireless mesh network is provided. An optical wireless communication network communication system A1 comprises an optical wireless communication network communication system A1 comprising: an optical transmitter Ti and an optical receiver Ri, and an optical fiber cable or a coaxial cable for transmitting a signal received by the optical receiver Ri to the optical transmitter Ti at each node, wherein the n+1 node Ni is connected by a network, the optical wireless communication transceiver Si at each node Ni is capable of transmitting simultaneously to all the optical wireless communication transceivers Sj of the other n nodes Nj when its own node Ni and all of the other n nodes Nj satisfy a predetermined condition, and can be received simultaneously from all the optical wireless communication transceivers Sj of the other n nodes Nj.

Abstract: A process for packaging semiconductors or integrated circuits including semiconductors involves positioning a lead frame on which semiconductors or an integrated circuit are mounted between two thermoplastic resin moldings, at least one of which moldings has a cavity for holding the semiconductors or the integrated circuit and thereafter integrally joining the thermoplastic resin moldings under heat and pressure to the lead frame. An uneven surface is provided on at least a part of the surfaces to be joined of either or both of the two thermoplastic resin moldings. This uneven surface is formed around the cavity in a thermoplastic resin molding having a cavity or on a surface of the thermoplastic resin molding having no cavity which corresponds to the surface to be joined to the other thermoplastic molding having a cavity.

Abstract: The present invention is directed to a hollow frame for a game racket substantially constructed from a first fiber reinforced thermoplastic frame member which continuously provides outside peripheral portions of the tadpole shape of the frame including a head portion, a straight handle portion and a triangular throat portion which connects the head and handle portions, and a second fiber reinforced thermoplastic frame member which integrally provides the inside remaining portions, as viewed in the tadpole plan view, of the head, throat and handle portion, wherein the first and second frame members are joined together so as to form a hollow frame.

Abstract: A carbon filament wound hollow cylinder comprising at least two carbon filament layers, an inner axial direction-wound layer and an outer circumferential direction-wound layer, characterized in that the modulus of longitudinal elasticity in the circumferential direction of the inner layer is lower than that of the outer layer. Such a cylinder is capable of preventing possible crack formation after shaping owing to its much reduced residual stress exerted due to thermal expansion of a mandrel during shaping and capable of being stably employable as a rotary drum for, ultracentrifugation because compressive stress is exerted effectively to cancel tensile stress caused by thermal stress for causing interlaminer delamination during high speed rotation.

Abstract: A golf club shaft made of a filament reinforced resin wherein a group of filaments are wound at a winding angle of 10.degree. or less and another group of filaments are wound at a winding angle of 25.degree. to 65.degree. and capable of much reducing the torsion of the shaft, reducing the weight of the shaft, increasing the bending strength of the shaft and increasing the flying distance of a golf ball.