Abstract: A manufacturing method for manufacturing an optical fiber ribbon, the manufacturing method includes intermittently forming, with a connecting device, connection parts between optical fibers measuring a load of the connecting device during the intermittent forming of the connection parts, and detecting an abnormality based on the load.

Abstract: A slot type optical fiber cable includes a slot rod including a plurality of ribs for forming a plurality of slot grooves, and a plurality of optical fibers accommodated in the slot grooves. The number of the slot grooves is three or four.

Abstract: A delay measurement device measures a delay time of an end-to-end route path of a virtual private network related to a predetermined user. The delay measurement device includes a measurement route generation unit configured to generate a first route that transfers to a start point node of a route path, transfers back on the route path, and then returns to itself, and to generate a second route of a route that transfers to the start point node of the route path and returns to itself; a packet transmission/reception unit configured to transmit and receive packets circulating on the first route; a delay measurement unit configured to measure a time from transmission of the packet to reception of the packet to set the measured time as a delay time of the route; and a one-way delay calculation unit configured to calculate a one-way delay time of the route path.

Abstract: There is provided route control with excellent flexibility even in a large-scale multicast transfer system. A multicast transfer system transfers a multicast packet arriving at a plurality of destinations between multicast communication devices 1, and a packet transfer processing unit 15 of the multicast communication device 1 transfers, when an interface of a multicast communication device 1 adjacent to itself is specified as a transfer destination of a received multicast packet, the multicast packet to the specified interface, and transfers, when the interface of the multicast communication device 1 adjacent to itself is not specified as the transfer destination of the received multicast packet, the multicast packet to an interface to a multicast communication device 1 specified as the destination.

Abstract: An oxygen sensor for detecting gas concentration based on either an electric current value or a resistance value measured when a voltage is applied to a sensor element includes gaps formed between electrodes arranged in an element main body and ridges where surfaces of an element touch each other. These gaps will be escaping parts for expansion and contraction of electrode material that accompany thermal expansion and contraction of a sensor main body, and concentration of thermal stress at edge parts of the element main body may thus be eliminated, thereby alleviating thermal stress on the oxygen sensor. This allows provision of a gas sensor that controls generation of cracks in the element and that is stably usable over a long period of time.

Abstract: A delay measurement device includes a NW measurement unit that measures a topology, a delay amount of each link, jitter, and a packet loss rate, and causes a NW state holding unit to hold them as NW state information, a link quality calculation unit that calculates the link quality between the end points as a weight on the basis of the NW state information including the topology, the delay amount of each link, the jitter, and the packet loss rate, and a path calculation function unit that calculates a measurement path on the basis of a weighted topology in which the weight of the link quality calculated by the link quality calculation unit is reflected in the topology. The NW measurement unit transmits a measurement packet to a start point and measures the delay amount of a measurement target section of a NW.

Abstract: A method for manufacturing an intermittently coupled-type optical fiber ribbon includes arranging a plurality of optical fibers in parallel in a direction orthogonal to a longitudinal direction of the plurality of optical fibers, coating all of the plurality of optical fibers with a coupling resin, intermittently inserting a cleaving blade into the coupling resin between some adjacent optical fibers of the plurality of optical fibers to form slits. An outer diameter of each of the optical fibers is 220 ?m or less. A distance between the optical fibers into which the cleaving blade is inserted among the adjacent optical fibers is 10 ?m or more and 100 ?m or less.

Abstract: A route calculation device (1) includes: an input unit (11) that receives input parameters including an index for selecting a path to be set in a communication system (20); a route calculation unit (12) that selects a reference path based on the index and preferentially selects, from among one or more other paths each of which passes through a route different from the reference path, a path having a lower degree of sharing a router through which the reference path passes; and a route setting unit (15) that sets the reference path and the another path selected by the route calculation unit (12) in the communication system (20).

Abstract: A refrigeration cycle apparatus suppresses a phenomenon that a condensed refrigerant accumulates in a heat source-side heat exchanger during a low-load operation. A refrigeration cycle apparatus performs air conditioning of a target space. The refrigeration cycle apparatus includes a refrigerant circuit and a controller. The refrigerant circuit includes a compressor, a heat source-side heat exchanger, an expansion mechanism, a usage-side heat exchanger, and a flow direction switching mechanism. The controller controls the compressor and the flow direction switching mechanism. The controller executes first control of temporarily increasing the pressure of the refrigerant flowing through the heat source-side heat exchanger in a low-load operation in which the refrigerant circuit is in a low-load state with a low air conditioning load and the compressor operates at a predetermined number of rotations or less.

Abstract: A sensor element (12) has a cross-sectional area that continuously only increases from a positive (+) electrode side toward a negative (?) electrode side, thereby leading a hot spot, which attempts to move to the negative electrode side, to a lower resistance side. A position that is at nearly equal distances from paired electrodes (13 and 15) formed on either end of the sensor element (12) is set as a hot spot generating position, so as to avoid damage to the electrodes due to heat emitted by the hot spot.

Abstract: The network control system 100 includes an NW state measurement part 111 which measures a network topology, a delay amount of each link, a jitter, a traffic amount, and a link band and makes an NW state holding DB 112 holding them as NW state information, and an NW design information holding DB 132 which holds a quality requirement including an endpoint, a delay amount, and jitter, and information on a necessary band, as a design information of each NW, and a route calculation unit 121 which calculates an optimum route with quality requirements as constraint conditions on the basis of the NW state information held in the NW state holding DB 112 and the NW design information held in the NW design information holding DB 132, and a route control unit 131 on the basis of the route information calculated by the route calculation unit 121.

Abstract: A software update management apparatus includes a storage unit adapted to divide a network into one or more blocks and store block management information indicating whether each of network devices belonging to each of the resulting blocks is an active device or a standby device; an update instruction receiving unit adapted to receive software update instructions; a software update information generating unit adapted to generate software update information; a software updating unit adapted to perform software update processes after transferring traffic to standby devices in same blocks as respective active devices when it is determined that the network devices are active devices according to the software update information and thereby perform the software update processes for active devices or standby devices in different blocks in parallel.

Abstract: A transfer device is capable of outputting packets to a plurality of physical lines, and includes a measurement unit configured to measure performance of network requirements specified by a given service for each physical line; and a selection unit configured to select the physical line at which the measured performance is maximized from among the plurality of physical lines. A transfer control device includes an instruction unit configured to receive an advertisement including route information for selecting a route for each network requirement from a transfer device that outputs packets to a plurality of physical lines, and to offer a route instruction using the route information to a service for which the requirement is specified.

Abstract: The disclosure prevents a state where a liquid refrigerant is likely to be accumulated in an outdoor heat exchanger upon small load operation at low outdoor temperature during cooling operation. A junction part is disposed between a path and a liquid side inlet-outlet port, and includes a junction flow passage configured to cause a refrigerant flowing from the path to the liquid side inlet-outlet port to join and flow therein. A branching passage has a first end connected to the path, and a second end connected to the junction flow passage. An outdoor heat exchanger is configured to increase, upon decrease in load, a flow rate ratio of a refrigerant flowing to the branching passage to volume of a refrigerant flowing to the path.

Abstract: A performance monitoring device enables performance monitoring by transfer delay monitoring of a virtual server that operates on a physical server including a physical resource and provides a network function. A performance monitoring device includes: a deployment unit that causes, in a case where the number of the virtual server is one, a measurement virtual server using the same physical resource as the physical resource of the virtual server to operate on the physical server; a path setting unit that sets the measurement virtual server to transmit a response packet to the performance monitoring device for a measurement packet; and a measurement unit that measures a first transfer time from when the measurement packet is transmitted to the measurement virtual server until the response packet is received.

Abstract: An edge switching device of an edge switching system includes: a remaining lease time information obtainment unit configured to obtain remaining lease time information for each of user terminals from a DHCP server; a submission order determination unit configured to determine a submission order for user configuration information in order from a shortest remaining lease time; a user configuration information submission unit configured to submit, to a backup system edge router, user configuration information of each of the user terminals, according to the determined submission order; and a reconnection inducement instruction unit configured to send, to the DHCP server, an instruction to send reconnection inducement information to the user terminals for which the user configuration information has been submitted.

Abstract: A network monitoring apparatus sets monitoring targets that are physical interfaces included in leaf nodes and spine nodes, links connecting the leaf nodes and the spine nodes, transfer function units included in the spine nodes, and an overlay tunnel set between the originating-side leaf node on the terminating-side leaf node, aggregates monitoring results at the respective monitoring targets, and determines the failure type of a failure and the degree of influence of the failure on the basis of the type of the monitoring target in which the failure has occurred and the occurring event.

Abstract: A method for manufacturing an intermittently coupled-type optical fiber ribbon includes arranging a plurality of optical fibers in parallel in a direction orthogonal to a longitudinal direction of the plurality of optical fibers, coating all of the plurality of optical fibers with a coupling resin, intermittently inserting a cleaving blade into the coupling resin between some adjacent optical fibers of the plurality of optical fibers to form slits. An outer diameter of each of the optical fibers is 220 ?m or less. A distance between the optical fibers into which the cleaving blade is inserted among the adjacent optical fibers is 10 ?m or more and 100 ?m or less.

Abstract: A radar apparatus includes an antenna composed of an end-fire array antenna and including a plurality of antenna elements; and a circuit board in which the plurality of antenna elements is disposed side by side in a first direction. At least one of the plurality of antenna elements is parallel to a substrate surface of the circuit board. A directivity of at least one of the plurality of antenna elements is set to a third direction tilted with respect to the first direction and a second direction orthogonal to the first direction.

Abstract: A latency measurement apparatus (10) includes a topology detection unit (13) that collects routing information from a NW (30) to which a plurality of nodes are connected to detect topology information, a path determination unit (14) that determines inter-node path information based on the topology information, a test packet generation unit (15) that generates a test packet, a marking unit (20) that performs time-keeping with a time-keeping unit (19), marks the test packet with transmission time information based on the time-keeping when the test packet is transmitted to the path according to the inter-node path information, and marks the test packet with reception time information based on the time-keeping when the test packet is received from the path, and a latency calculation unit (17) that calculates a latency time from a difference between the marked transmission time information and reception time information and stores the calculated latency time information in a DB (16) in association with the path in