Abstract: A wireless communication network system (1) comprising a sensor device (10) transmitting detected data, one or a plurality of relay devices (100) relaying the data, and a gateway device (11) transferring the data to another network, wherein the sensor device, the relay device, and the gateway device being connected by a wireless communication network, wherein the relay device comprising: a receiver (101) receiving a received signal containing the data; a storage (104) storing heartbeat data; a transmitter (102) transmitting a transmission signal containing the data received by the receiver and periodically transmitting a transmission signal containing the heartbeat data; and a frequency setting unit (103) directing to set a frequency of the received signal received by the receiver and/or a frequency of the transmission signal transmitted from the transmitter based on a frequency setting command transmitted from the gateway device.

Abstract: A connector component for optical fibers has good dimensional accuracy and parallelism. The connector component includes a base material. The base material is provided with at least two holes for inserting and fixing optical fibers therein. The base material is made of quartz glass. Inner components are arranged for forming holes for inserting optical fibers in a die for forming an outer form of the connector component with a dimensional accuracy equal to or less than 2 ?m. Slurry is poured into the die, the slurry including quartz powder, a resin binder, a dispersant, water and a curing agent. The poured slurry is cured and heated under vacuum so as to vitrify the cured slurry to obtain the quartz glass.

Abstract: Electromagnetic energy generated by a collection of individual laser modules is coupled by corresponding individual waveguides to an input of a multi-lumen ferrule. The energy is conveyed from an output of the multi-lumen ferrule to collimating and converging assemblies before being transmitted to a trunk fiber and thence to a laser handpiece.

Abstract: A connector component for optical fibers has good dimensional accuracy and parallelism. The connector component includes a base material. The base material is provided with at least two holes for inserting and fixing optical fibers therein. The base material is made of quartz glass. Inner components are arranged for forming holes for inserting optical fibers in a die for forming an outer form of the connector component with a dimensional accuracy equal to or less than 2 ?m. Slurry is poured into the die, the slurry including quartz powder, a resin binder, a dispersant, water and a curing agent. The poured slurry is cured and heated under vacuum so as to vitrify the cured slurry to obtain the quartz glass.

Abstract: There is provided a multi-cored fiber array for optical communication which has high dimensional accuracy, can easily be prepared by machining, and is low in cost. There is also provided a fiber array for optical communication which can reduce the necessary amount of an adhesive used for fixing optical fibers to a substrate. The fiber array for optical communication comprises: a substrate for inserting optical fibers therein; and a press plate for pressing and fixing the inserted optical fibers. The substrate has a plurality of grooves into which the optical fibers are to be inserted. The accuracy of the center-to-center dimension between the grooves adjacent to each other is within ±0.5 ?m, and the degree of parallelization in the groove length direction between the grooves adjacent to each other is within ±0.1 degree.

Abstract: A connector component for optical fibers has good dimensional accuracy and parallelism. The connector component includes a base material. The base material is provided with at least two holes for inserting and fixing optical fibers therein. The base material is made of quartz glass. Inner components are arranged for forming holes for inserting optical fibers in a die for forming an outer form of the connector component with a dimensional accuracy equal to or less than 2 ?m. Slurry is poured into the die, the slurry including quartz powder, a resin binder, a dispersant, water and a curing agent. The poured slurry is cured and heated under vacuum so as to vitrify the cured slurry to obtain the quartz glass.

Abstract: There is provided a multi-cored fiber array for optical communication which has high dimensional accuracy, can easily be prepared by machining, and is low in cost. There is also provided a fiber array for optical communication which can reduce the necessary amount of an adhesive used for fixing optical fibers to a substrate. The fiber array for optical communication comprises: a substrate for inserting optical fibers therein; and a press plate for pressing and fixing the inserted optical fibers. The substrate has a plurality of grooves into which the optical fibers are to be inserted. The accuracy of the center-to-center dimension between the grooves adjacent to each other is within ±0.5 ?m, and the degree of parallelization in the groove length direction between the grooves adjacent to each other is within ±0.1 degree.

Abstract: An optical connector capable of providing a multicore ferrule for optical communication or a fiber array for optical communication having a high dimensional accuracy and easily manufactured at a low cost, comprising a plurality of insert holes for inserting optical fibers therein arranged at specified intervals, characterized in that the accuracy of the center-to-center distances between the adjacent insert holes is within ±0.5 ?m and a parallelism between the adjacent insert holes in hole axial direction is within ±0.1°.

Abstract: A connector component for optical fibers has good dimensional accuracy and parallelism. The connector component includes a base material. The base material is provided with at least two holes for inserting and fixing optical fibers therein. The base material is made of quartz glass. Inner components are arranged for forming holes for inserting optical fibers in a die for forming an outer form of the connector component with a dimensional accuracy equal to or less than 2 &mgr;m. Slurry is poured into the die, the slurry including quartz powder, a resin binder, a dispersant, water and a curing agent. The poured slurry is cured and heated under vacuum so as to vitrify the cured slurry to obtain the quartz glass.

Abstract: The present invention relates to a solid electrolyte consisting essentially of cerium oxide for a fuel cell. In addition, this solid electrolyte is prevented from becoming reduced under the effect of a fuel gas of a fuel cell. The present invention also relates to a method for producing this solid electrolyte and to a high-temperature-type fuel cell utilizing this solid electrolyte. This solid electrolyte for a fuel cell comprises:(a) a specifically-shaped solid electrolyte consisting essentially of cerium oxide; the solid electrolyte having a fluorite-type structure and oxide-ionic conduction; and(b) a perovskite-type oxide having an ABO.sub.3 -type composition, which is a solid electrolyte of proton/oxide-ionic mixed conduction and is bonded as a membrane on a part of the surface of the solid electrolyte consisting essentially of cerium oxide, in which(i) A of the "ABO.sub.3 " represents at least one element selected from the group consisting of alkaline earth metals; and(ii) B of the "ABO.sub.

Abstract: On the inner surface of sensor element made of proton conductive solid electrolyte with perovskite structure and enclosed at its lower end, a reference electrode constituted of porous electrode is formed, and a measuring electrode constituted of porous electrode is formed on the outer surface thereof. And, the reference electrode and the measuring electrode are gas-tightly separated by sealing material. The sensor prove is inserted into ceramic sensor holding cup and both are fixed in such a way that a part of the measuring electrode extrude into said holding cup. Then, by dipping the holder into molten metal by facing its opening part downwards, a space contacting with molten metal is enclosed in the holding cup. Thereby, reduction of solid electrolyte constituting the sensor element can be prevented, and hydrogen concentration in molten metal can be accurately measured without direct dipping the sensor element into molten metal.

Abstract: On the inner surface of sensor element made of proton conductive solid electrolyte with perovskite structure and enclosed at its lower end, a reference electrode constituted of porous electrode is formed, and a measuring electrode constituted of porous electrode is formed on the outer surface thereof. And, the reference electrode and the measuring electrode are gas-tightly separated by sealing material. The sensor prove is inserted into ceramic sensor holding cup and both are fixed in such a way that a part of the measuring electrode extrude into said holding cup. Then, by dipping the holder into molten metal by facing its opening part downwards, a space contacting with molten metal is enclosed in the holding cup.Thereby, reduction of solid electrolyte constituting the sensor element can be prevented, and hydrogen concentration in molten metal can be accurately measured without direct dipping the sensor element into molten metal.