Abstract: A waveguide estimation device includes: a time window processing unit that multiplies time-series tap coefficients of an adaptive filter by a time window function; and an estimation unit that estimates at least one of a differential group delay in a frequency series or a time series and a polarization dependent loss in a frequency series or a time series based on the time-series tap coefficients in a time window. The estimation unit may estimate at least one of the differential group delay in a frequency series or a time series and the polarization dependent loss in a frequency series or a time series based on a tap coefficient exceeding a lower limit threshold value or falling below an upper limit threshold value among the time-series tap coefficients in a time window. The estimation unit may estimate the average value of the differential group delays in a frequency series or a time series.

Abstract: A packet relay system (1) includes a tenant (51) in which a plurality of tap devices (513, 514) terminating a tunneling protocol are built, a tenant (52) in which a plurality of tap devices (523, 524) are built, and a plurality of relay devices (41, 42) connecting the plurality of tenants (51, 52) and external devices (31, 32). The relay devices (41, 42) include respective connection management units (414, 424) that determine transfer destinations of packets received from the external devices (31, 32) based on header information of the packets.

Abstract: One aspect of the present invention is an optical transmission system including a transmitter connected to a transmission line having M spatial channels, and a receiver that receives a signal transmitted from the transmitter via the transmission line, wherein the transmitter includes: an allocator that allocates a transmission bit string transmitted to the transmission line into a bit string serving as a basic signal and a bit string serving as spatial channel information; a generator that generates N (M>N) signals from the bit string serving as the basic signal allocated by the allocator; and a selector that selects N spatial channels, through which the N signals generated by the generator are transmitted, from the M spatial channels on the basis of the bit string serving as the spatial channel information allocated by the allocator.

Abstract: A base station of an embodiment includes first and second wireless signal processing units and a link management unit. The link management unit establishes a multi-link with a terminal apparatus by using the first and second wireless signal processing units, and sets a primary link used as a main and a secondary link used as an auxiliary during the multi-link. The link management unit transmits a first wireless frame requesting a change of the primary link to the terminal apparatus by using the first wireless signal processing unit set to the primary link, and the link management unit changes the primary link from the first wireless signal processing unit to the second wireless signal processing unit if either the first or second wireless signal processor receives the affirmative response from the terminal apparatus after the first wireless frame is transmitted.

Abstract: A wireless communication system according to one embodiment includes: a weather radar antenna that is provided in the wireless station and receives a weather radar signal transmitted from the wireless station toward the node station and reflected; rainfall amount prediction circuitry configured to predict a rainfall amount between the wireless station and the node station on the basis of the weather radar signal received; quality prediction circuitry configured to predict quality of wireless communication between the wireless station and the node station on the basis of the rainfall amount predicted; and switching control circuitry configured to perform control to switch a line connecting the node station and the wireless station to another line connecting the node station and another communication station before interruption of the line in a case where the quality of the wireless communication predicted is less than a predetermined threshold.

Abstract: A radio wave arrival direction estimation device according to an embodiment includes an antenna angle acquisition unit that acquires each of antenna angles indicating a plurality of different directions in which antennas having non-uniform antenna patterns are sequentially directed, a reception intensity measurement unit that measures reception intensities at which the antenna has received a radio wave at each of the antenna angles acquired by the antenna angle acquisition unit, a matching degree Calculation unit that calculates a matching degree between the antenna angle acquired by the antenna angle acquisition unit and the reception intensity measured by the reception intensity measurement unit, and an antenna pattern of the antenna for each antenna angle acquired by the antenna angle acquisition unit, and an estimation unit that estimates an antenna angle at which the matching degree Calculated by the matching degree Calculation unit is the maximum as an arrival direction of the radio wave.

Abstract: A reception device includes a reception unit that receives a signal obtained by polarization multiplexing of an X polarized wave and a Y polarized wave, converts a received signal into a received signal corresponding to each of the X polarized wave and the Y polarized wave, and outputs the received signal, a first signal decoding unit that decodes one series of transmission signals from the received signal output by the reception unit, a polarization separation unit that performs polarization separation on the received signal corresponding to each of the X polarized wave and the Y polarized wave and output by the reception unit, a second signal decoding unit that decodes the received signal polarization-separated by the polarization separation unit, and a first polarization processing switching unit that captures a received signal corresponding to each of the X polarized wave and the Y polarized wave and output by the reception unit, and switches an output destination of the received signal that has been capt

Abstract: Provided is an optical access system that performs communication using an optical signal on which management control signals used for management and control are superimposed in a plurality of transmission lines connecting a plurality of subscriber devices, the optical access system including: a plurality of splitters that are provided for the respective transmission lines and split a plurality of optical signals transmitted from the plurality of subscriber devices; a monitoring unit configured to acquire the management control signals from each of the plurality of optical signals split by each of the plurality of splitters; and an output device that is provided between the monitoring unit and the plurality of splitters and outputs the plurality of optical signals split by the plurality of splitters to the monitoring unit.

Abstract: A server delay controller includes: a packet harvesting unit that refers to a packet held in a ring buffer when a packet arrives and executes harvesting to delete an entry of a corresponding queue from the ring buffer, a sleep management unit that puts the thread to sleep in a case in which a packet does not arrive for a predetermined period, and cancels the sleep of the thread through a hardware interrupt at the time of packet arrival, and an idle state recovery control unit that periodically wakes up the thread during sleep or wakes up the thread immediately before the packet arrival in accordance with a packet arrival timing.

Abstract: An integrated optical device capable of easily connecting waveguides and achieving stable optical coupling is provided. In the integrated optical device in which an optical circuit that is provided on a substrate that does not transmit light from an ultraviolet range to a visible range and performs optical signal processing and an optical function element made of a material that does not transmit light in the ranges are butt-connected, in the optical circuit, a butt coupling holding substrate that transmits light in the ranges is mounted in a groove that reaches a connection end face where an input/output waveguide is formed, the connection end face of the optical circuit and an end face of the butt coupling holding substrate are processed to be flush with each other, and the optical circuit and the optical function element are fixed by a UV curing adhesive filling the connection end face.

Abstract: Crosstalk between adjacent channels is suppressed when monitoring output power. A multi-channel optical module for multiplexing and outputting a plurality of wavelength channels, which includes a plurality of light sources each having a different wavelength, a plurality of collimator lenses coupled to an output of each of the plurality of light sources, a beam splitter coupled to an output of each of the plurality of collimator lenses, a plurality of monitor PDs for monitoring optical power branched from the beam splitter, and a shielding plate installed between the plurality of collimator lenses.

Abstract: A rule creation apparatus according to an embodiment includes a first analysis unit, a second analysis unit, a selection unit, and a rule creation unit. The first analysis unit calculates first feature amounts indicating features of event messages acquired from a target system. The second analysis unit calculates a second feature amount indicating a feature of a text including information indicating an intention of a user regarding identification of a failure in the target system. The selection unit selects a possible message corresponding to the intention of the user from the event messages on the basis of a similarity between each of the first feature amounts and the second feature amount. The rule creation unit creates an identification rule for identifying a failure in the target system from the event messages on the basis of the possible message and the text.

Abstract: An aerial image display device includes a display, a retroreflective material, a retardation plate, a beam splitter, and a polarizing plate. The display, the retroreflective material, and the beam splitter are disposed on an installation bottom surface. The display emits polarized light of a display image that is the basis of an aerial image in accordance with a polarization direction of incident light. The retroreflective material reflects incident light in an incident direction. The beam splitter reflects polarized light of the display image emitted from the display toward the retroreflective material in accordance with the polarization direction of the incident light and has polarized light of the display image reflected by the retroreflective material transmitted therethrough. The polarizing plate is disposed above the installation bottom surface, extends across an imaging plane of the aerial image, and has polarized light transmitted through the beam splitter transmitted therethrough.

Abstract: A dialogue learning device comprising: a dialogue data acquisition unit configured to acquire dialogue data including a dialogue context indicating text of a dialogue and speech data of a response sentence of the dialogue; an acoustic feature value calculation unit configured to calculate an acoustic feature value on the basis of the speech data; and a dialogue learning unit configured to learn a dialogue generation model for generating a dialogue on the basis of the dialogue context and data indicating the calculated acoustic feature value.

Abstract: Provided is an acoustic signal output device including a driver unit that emits a first acoustic signal to one side and emit a second acoustic signal having an opposite phase to the first acoustic signal to the other side, a first waveguide that has one end connected to the one side of the driver unit and leads out the first acoustic signal, a second waveguide that has one end connected to the other side of the driver unit and leads out the second acoustic signal, and a housing including a first hollow portion to which the other end of the first waveguide is connected and a second hollow portion to which the other end of the second waveguide is connected. Here, the first hollow portion is provided with a first sound hole that leads out the first acoustic signal to the outside, and the second hollow portion is provided with second sound holes that lead out the second acoustic signal to the outside.

Abstract: Provided is a method for opening an optical communication path, in which one or more optical switches include a plurality of first ports and a plurality of second ports, and a management control device switches connection such that other first ports grouped with a transmission port connected first port of the one or more optical switches connected to a transmission port of the one subscriber device are sequentially connected to one second port to which a response request signal is input, transmits the response request signal to the one second port each time the connection is switched, specifies a reception port connected first port connected to a reception port of the one subscriber device in accordance with reception of a response signal in response to the response request signal, and sets a connection relation between the ports of the one or more optical switches such that an optical signal input to the transmission port connected first port reaches an optical transmission line to which a reception port of

Abstract: There is provided an acoustic signal output device worn on an auricle, the acoustic signal output device including a housing that emits an acoustic signal, a first wearable portion that holds the housing and is worn on a first auricle portion that is a part of the auricle, and a second wearable portion that holds the housing and is worn on a second auricle portion that is a part of the auricle different from the first auricle portion. However, the first wearable portion includes a first fixing portion that grips or sandwiches an end of the first auricle portion, and/or the second wearable portion includes a second fixing portion that grips or sandwiches an end of the second auricle portion.

Abstract: A method includes: acquiring a hook point and a virtual program counter by analyzing a virtual machine of a script engine; acquiring a branch virtual machine instruction by analyzing an instruction set architecture; and providing an analysis function to the script engine based on the acquired virtual program counter and the acquired branch virtual machine instruction, wherein the analysis function is provided by applying a hook to the acquired hook point and wherein the hook includes processing of, in response to an occurrence of an exception, changing a pointing destination of a virtual stack pointer to a return destination of a function immediately before a part where the exception has occurred.

Abstract: A quantum random number generator is provided that can generate more secure random numbers in consideration of at least one of imperfection of quantum bits or imperfection of a projective measurement equipment. In this generator, the functional configuration of a random number extractor differs from a conventional configuration, and the random number extractor acquires a probability distribution of measurement expectation values from information of a random number sequence for measurement basis selection used in the equipment, and at least one of information of imperfection of the equipment measured in advance, or information of imperfection of a quantum bit generator. Then, an estimation probability is calculated by using the probability distribution of the measurement expectation values, and a measurement result in a binary bit string output from the equipment is compressed by the calculated estimation probability to extract a secure random number.

Abstract: A calculation processing system includes: a first processing device including a first computer and a first movement control management device; and a second processing device including a second computer and a second movement control management device, the first processing device and the second processing device are connected with each other, the temperature of a place where the first processing device is installed is higher than the temperature of a place where the second processing device is installed, and the second computer executes calculation in a virtual machine migrated from the first computer, exhausts heat generated in association with the calculation, and transmits a result of the calculation to the first computer.