Abstract: A communication system performs communication on the basis of a TCP. The communication system includes a transmission-side device and a reception-side device. A route switching time zone is a time zone in which a communication route between the transmission-side device and the reception-side device is switched from a first communication route to a second communication route. When detecting packet missing of a first packet in the route switching time zone, the reception-side device prohibits transmission of a retransmission request related to the first packet to the transmission-side device during a first time from detection of the packet missing. When not receiving the first packet during the first time, the reception-side device transmits a retransmission request related to the first packet to the transmission-side device.

Abstract: A transmission device, which is provided between user devices and transmits a client signal transmitted by the user devices through an optical transmission network, the transmission device comprising: a setting unit of setting a path having a band for accommodating the client signal obtained from a monitoring result of a control signal transmitted and received at a time of negotiation between the user devices; and a transfer unit of transferring the client signal using the path set by the setting unit.

Abstract: A matching device includes processing circuitry configured to generate, for each IP address range in a list indicating reference IP address ranges, a record indicating a start IP address and a record indicating an end IP address in the IP address range, combine the record indicating a start IP address and the record indicating an end IP address of each of the reference IP address ranges and a record indicating an IP address to be matched, sort a combined record group using an IP address of the record as a primary key and information indicating whether the record is a record of the IP address to be matched, a record indicating the start IP address, or a record of the end IP address as a secondary key, and determine that the IP address to be matched matches an IP address range.

Abstract: A determination device includes processing circuitry configured to detect a communication log of an attack causing different damage in accordance with a function of a web application of a request destination using a URL of the request destination in a communication log in which an attack is to be detected, determine whether or not the attack has succeeded using whether or not there is a login form in the URL of the request destination, a response size to a request, or a status code, or any combination thereof, for the communication log in which the attack has been detected, and output a result of the determination.

Abstract: A beam transmission device transmits a directional beam toward a beam reception device in a wireless communication system. The main signal generation unit generates a main signal. A control signal generation unit periodically generates a control signal related to maintaining communication with the beam reception device. A signal multiplexing unit multiplexes the main signal and the control signal. A divergence angle adjustment unit sets a target divergence angle to a first divergence angle in a period in which the control signal is not included in the multiplexed signal, and sets the target divergence angle to a second divergence angle larger than the first divergence angle in a period in which the control signal is included in the multiplexed signal. A beam control unit changes a divergence angle of the beam modulated by the multiplexed signal to the target divergence angle.

Abstract: According to an embodiment, a learning device includes a data input unit, a feature extraction unit, and a relighted image generation unit. The data input unit acquires an input image and a lighting environment desired to be reflected as a lighting environment of a relighted image. The feature extraction unit extracts a feature quantity of an image structure of the input image from the input image. The relighted image generation unit generates a relighted image, based on pre-learning of a large-scale data set of an image and a lighting environment, from the extracted feature quantity of the image structure of the input image and the acquired lighting environment desired to be reflected.

Abstract: A frequency offset estimation device includes a correlation processing unit that obtains a correlation pattern that is a waveform pattern indicating a correlation between a reception signal spectrum and a detection pattern based on a power spectrum of the reception signal or the reception signal spectrum indicating an amplitude spectrum based on the power spectrum and the detection pattern that is a predetermined waveform pattern, and an estimation unit that estimates a frequency offset amount based on a peak position of the correlation pattern obtained by the correlation processing unit.

Abstract: A receiving apparatus includes: M receivers configured to receive signals based on sound waves propagating in water; M FIR filters configured to perform waveform operation on the signals received by the receivers; a combiner configured to combine output signals of the M FIR filters; and a filter coefficient calculation portion configured to calculate a tap coefficient of the M FIR filters so as to reduce an error of the output signals combined by the combiner. The M FIR filters have a tap length that is shorter than a delay spread that is a possible range between a time of arrival of a direct wave and a time of arrival of a delayed wave of the sound waves.

Abstract: A cancellation device according to one aspect of the invention is a cancellation device that cancels noise coming to a region in a vicinity of a loudspeaker, the cancellation device including at least two loudspeakers 1 and one reference microphone 3, in which the cancellation device is configured such that an acoustic signal emitted in a sound emission direction of a same loudspeaker and an acoustic signal emitted in an opposite direction collide with each other, the at least two loudspeakers 1 and the reference microphone 3 are arranged on a same plane, the at least two loudspeakers 1 emit cancellation sound that cancels the noise in synchrony, and the plane is a plane including a boundary between a sound emission direction of the two loudspeakers 1 and a direction opposite to a sound emission direction.

Abstract: An optical switch receives an input of an optical signal which has been transmitted by a first optical communication device from a first port, and outputs the optical signal from a second port connected to a first optical transmission line included in an optical route in which an optical path between the first optical communication device and a second optical communication device is set. An optical branching unit branches a part of the optical signal which has been transmitted through the first optical transmission line, and outputs the branched optical signal to a second optical transmission line. An optical transmitting and receiving apparatus includes a reception unit, a transmission unit, and a light cutoff unit. The reception unit receives an input of the optical signal which has been branched by the optical branching unit from the second optical transmission line, and acquires a signal addressed to a destination different from the second optical communication device from the input optical signal.

Abstract: An information processing device of an embodiment includes a voice recognition unit, an image recognition unit, an extraction unit, a first correction unit, and a second correction unit. The voice recognition unit recognizes a plurality of first words on the basis of a first voice. The image recognition unit recognizes a plurality of second words on the basis of a first image. The extraction unit extracts at least one of a third word included in the plurality of first words and not included in the plurality of second words or a fourth word included in the plurality of second words and not included in the plurality of first words. The first correction unit corrects a fifth word corresponding to the third word among the plurality of second words to the third word. The second correction unit corrects a sixth word corresponding to the fourth word among the plurality of first words to the fourth word.

Abstract: An optical access system that performs communication using an optical signal in which a management control signal used for management and control is superimposed in a plurality of transmission lines connecting a plurality of subscriber devices, in which the plurality of subscriber devices generates a plurality of optical signals by superimposing the management control signals of different frequencies on main signals of different wavelengths, and transmits the plurality of optical signals that has been generated, and the optical access system includes a monitoring unit that receives the plurality of optical signals transmitted from the plurality of corresponding subscriber devices, and acquires a plurality of management control signals of different frequencies from the plurality of corresponding optical signals that has been received.

Abstract: The present invention has an object to provide a mode field diameter measurement method enabling easily measuring a mode field diameter in an optical fiber, which is capable of propagating a fundamental mode (LP01 mode) and a first higher order mode (LP11 mode), without using a mode multiplexer, and a measurement device of the mode field diameter measurement method. In a mode field diameter measurement method according to the present invention, an intensity ratio between an LP01 mode and an LP11 mode output from an optical fiber to be tested is changed, a mode field diameter is measured by a variable aperture (VA) method for each intensity ratio, and each mode field diameter is calculated.

Abstract: A secure computation device 1n of the secure computation system includes a first calculation unit 11n, a second calculation unit 12n, a third calculation unit 13n, a fourth calculation unit 14n, and an output unit 15n. By calculation being performed in cooperation of these, a group by max operation or a group by min operation can be performed on a table to which a flag is added.

Abstract: An activity trace extraction device includes: an acquisition unit that acquires information regarding behavior of malware; a detection unit that detects an activity trace of the malware on the basis of the information regarding behavior of malware acquired by the acquisition unit; an addition unit that executes taint analysis on the malware and adds a taint tag based on the taint analysis to an output value of a predetermined application programming interface (API) in a case where the malware calls the API; a determination unit that determines presence or absence of dependency of the activity trace on the basis of the taint tag added by the addition unit; and an extraction unit that extracts the activity trace as an activity trace effective for detecting the malware in a case where the determination unit determines that there is no dependency of the activity trace.

Abstract: A prediction device includes: a normal prediction unit configured to predict first prediction values for target ranges of respective models, based on respective pieces of spatio-temporal observation data including observation values for respective observation locations and respective observation times observed for a given time period and the respective models for predicting variations of the pieces of spatio-temporal observation data for the respective target ranges defined for at least one of an observation location or a period; a residual extraction unit configured to extract, based on residuals between the respective pieces of spatio-temporal observation data being observed and the models corresponding to the respective pieces of spatio-temporal observation data based on the pieces of spatio-temporal observation data and the models, the respective pieces of spatio-temporal observation data with residuals greater than or equal to a threshold value, as spatio-temporal residual data; a residual prediction uni

Abstract: An operation pattern generation apparatus has a generating unit which generates, with respect to a test script to be used for a web application, operation patterns related to combinations of operation elements that cause a transition between screens of the web application and input data candidates for input elements to be used to input data on the screens, and with respect to the input element of which a default value of input data is set in advance, the generating unit combines only the default value with the operation elements in order to reduce time required for specification restoration of screen transitions of the web application.

Abstract: Provided is a server delay control system for performing, on a server including a Host OS, packet transfer between a physical NIC connected to the Host OS and an application deployed in a user space. A server delay control device configured to perform polling for packet transfer on behalf of the application is deployed in the user space. The server delay control device creates, between the application and the physical NIC, a communication path for communication via socket communication. The communication path includes a first queue and a second queue. The server delay control device includes: a packet dequeuer configured to poll whether a packet has been enqueued into the first queue and to dequeue the enqueued packet from the first queue; and a packet enqueuer configured to enqueue the dequeued packet into the second queue in the same context as the polling and dequeuing without causing a context switch.

Abstract: A positioning system includes equipment that receives a signal from a GNSS satellite, and a server apparatus that is connected to the equipment via a communication network. The equipment includes a memory and a processor configured to transmit information indicated by the signal to the server apparatus, and perform positioning of the equipment by using the information indicated by the signal. The server apparatus includes a memory and a processor configured to perform positioning of the equipment by using the information indicated by the signal received from the equipment.

Abstract: [Problem] To realize high-speed and fine-granularity scaling in a virtualization infrastructure. [Solution] A virtualization infrastructure 1 includes: a monitoring unit that monitors loads on a plurality of computes and loads on virtual machines that are execution environments operating on the plurality of computes; a scaling execution determination unit that determines execution of scaling and calculates a required resource amount; a resource dispensing control unit that manages and allocates a resource; a scaling method determination unit that, upon the determination of execution of scaling by the scaling execution determination unit, checks availability of the resource in each of the plurality of computes and selects any scaling method from the group consisting of scale-out, scale-up, and combined use of scale-out and scale-up; and a scaling indication unit that indicates the selected scaling method selected by the scaling method determination unit.