Abstract: An aim is to provide an optical communication system and an optical communication method for transmitting a wavelength-multiplexed signal whose signal quality on a reception side is adjusted to desired quality. A first optical transmitter outputs a first optical signal of a first wavelength at a first transmission intensity. A second optical transmitter outputs a second optical signal of a second wavelength longer than the first wavelength at a second transmission intensity lower than the first transmission intensity. A multiplexer outputs a third optical signal obtained by multiplexing the first optical signal and the second optical signal to an optical transmission line. The intensity of the first optical signal transmitted through the optical transmission line is reduced by inter-signal stimulated Raman scattering. The second optical signal transmitted through the optical transmission line is amplified by the inter-signal stimulated Raman scattering of the first optical signal.

Abstract: A radio wave control system according to the present disclosure includes a high power amplifier that generates broadband local signals including a first local signal having a first frequency and a second local signal having a second frequency, a reflective plate that modulates, when the first local signal and the second local signal are reflected by or transmitted through periodically disposed antenna elements, the first local signal and the second local signal, and beam-forms the first modulated signal and the second modulated signal in respectively different directions, and a control apparatus that controls directions in which the first modulated signal and the second modulated signal are beam-formed by electrically controlling the antenna elements and controlling phases of the first local signal and the second local signal incident on the reflective plate.

Abstract: A method for implementing a self-attentive encoder-decoder transformer framework for anomaly detection in event sequences is presented. The method includes feeding event content information into a content-awareness layer to generate event representations, inputting, into an encoder, event sequences of two hierarchies to capture long-term and short-term patterns and to generate feature maps, adding, in the decoder, a special sequence token at a beginning of an input sequence under detection, during a training stage, applying a one-class objective to bound the decoded special sequence token with a reconstruction loss for sequence forecasting using the generated feature maps from the encoder, and during a testing stage, labeling any event representation whose decoded special sequence token lies outside a hypersphere as an anomaly.

Abstract: A visit assistance device, a visit assistance system, a visit assistance method, and a program are provided that can assist realization of a comfortable visit. A visit assistance device (1) includes a registration unit (2) configured to register a status in a seated condition of a user who is seated in a predetermined space for each user and a display control unit (3) configured to cause a display device installed in an entrance of the space to display the registered status of the user together with information identifying the user.

Abstract: A computer-implemented method for identifying a device position is provided. The method includes synchronizing a clock between a first device and a second device to obtain a synchronized clock. The method further includes measuring a round-trip time of flight between an antenna from the first device and an antenna from the second device based on the synchronized clock. The method also includes estimating a relative angular position of the second device with respect to the first device based on the round-trip time of flight. The method additionally includes estimating a distance between the first device and the second device based on estimated round-trip time of flight. The method further includes estimating, by the first device, a position of the second device with respect to a known coordinate based on the relative angular position and the distance.

Abstract: An encryption terminal includes a terminal communication unit that receives an encryption algorithm for creating ciphertext from plaintext, the encryption algorithm being encrypted using a first one-time key in a one-time pad method, a terminal storage unit that stores a key table containing a second one-time key corresponding to the first one-time key, and a decryption unit that decrypts the encrypted encryption algorithm by using the second one-time key.

Abstract: The present invention provides an image display system, a terminal, a method, and a program that can quickly and accurately display an image corresponding to a particular location. An image display system according to one example embodiment of the present invention includes: a current image acquisition unit configured to acquire a first image captured by a mobile terminal; an information acquisition unit configured to acquire information including a position and an orientation of the mobile terminal that has captured the first image; a past image acquisition unit configured to acquire a second image based on the position and the orientation of the mobile terminal and a position and an orientation associated with the second image stored in the past in a storage device; and a difference detection unit configured to detect a difference between the first image and the second image.

Abstract: Methods and systems for supporting trusted communication between nodes from different blockchains are provided. The method comprises using a bootstrapping service for bootstrapping trust among blockchains of a group of federated blockchains. The bootstrapping service records security parameters of the federated blockchains. The security parameters include information on consensus configurations of the federated blockchains.

Abstract: Earthquake detection via fiber sensing is provided using using a supervisory path of submarine cables wherein the supervisory system/path of a submarine optical cable conveys portion(s) of an optical signal back to an origin location periodically—i.e., at every repeater location. Advantageously, since it is known where a returning signal is coming from, a resolution equivalent to an undersea span length may be determined—which is sufficient for wide area disturbances such as earthquakes. The returned signal is sufficiently strong such that the signal-to-noise ratio of a returned/received signal is not limited by the ASE noise of the amplifiers. The returned signal is much larger as compared to a normal distributed acoustic sensing (DAS) return signal since the return signal according to aspects of the present disclosure is directed backward via an optical coupler/reflector/circulator having a much larger coupling ratio as compared to normal Rayleigh back scattering utilized in DAS.

Abstract: An operation control apparatus (10) includes a data acquisition unit (110) and an apparatus control unit (120). The data acquisition unit (110) acquires first congestion data. In a present example, the data acquisition unit (110) generates the first congestion data by processing an image generated by an image capture unit. The image processing performed herein includes, for example, processing of counting the number of persons in a crowd. The apparatus control unit (120) controls an apparatus to be controlled by using the first congestion data. For example, when the first congestion data exceed a reference value, the apparatus control unit (120) reduces the number of operating apparatuses to be controlled and lowers a response speed of the apparatus to be controlled in such a way that the number of persons moving from a second area to a first area per unit time decreases.

Abstract: A first base station (131) is configured to notify a second base station (132) of frequency accuracy information indicating frequency accuracy of the first base station (131) in a wireless manner or via a backhaul.

Abstract: Setting or verification of a monitoring rule in response to a monitoring target environment is supported. An information processing system includes a situation information receiving unit that receives an input of situation information indicating a situation in a monitoring target environment. The information processing system further includes a normal situation storage unit. The normal situation storage unit stores environment information indicating the monitoring target environment in association with a set of situation information indicating a situation that is not abnormal in the monitoring target environment. The information processing system further includes a retrieval unit. The retrieval unit refers to the normal situation storage unit upon receiving the input of the situation information indicating the information in the monitoring target environment.

Abstract: A secure computation system comprising secure computation server apparatuses, each of which comprises: a discriminant share generation part that computes discriminant shares configured so that an index relating to an input corresponds to a specific value from shares representing the index relating to the input and possible combinations of index shares of an array; a combination configuration part that configures a combination of shares of an element in the array and the discriminant shares for all possible combinations of indices of the array; a shuffle part that shuffles the combinations; a reconstruction part that reconstructs the discriminant shares in the shuffled combinations; and a selection part that selects shares of an element in the array in the combinations where the reconstructed value is the specific value.

Abstract: In the present invention, in order to enable stable operation of a single-wave-modulation transmission device, etc., for a longer period, a processing device comprises: a processing unit for performing an adjustment process, which is a process in which the intensity and wavelength of a laser beam from a semiconductor laser used for transmission is adjusted on the basis of the intensity of the laser beam that has not passed through a wavelength filter that restricts the wavelength band of the laser beam and the intensity of a laser beam that has passed through the wavelength filter; and a storage unit for storing the result of the adjustment process.

Abstract: A Machine-to-machine (M2M) terminal (11) comprises a radio communication unit (111) and a controller (112). The radio communication unit (111) is configured to communicate with a base station (13). The controller (112) is configured to change at least one of a cell selection operation, a cell reselection operation, and a handover operation according to whether a specific coverage enhancement processing is required or according to whether the specific coverage enhancement processing is supported by at least one of a cell (13) in which the M2M terminal (11) camps on and a neighbouring cell (14) of the cell (13) which the M2M terminal (11) camps on. It is thus possible to provide an improved technique for allowing the M2M terminal that is supporting a special coverage enhancement processing for M2M terminals to camp on an appropriate cell.

Abstract: A spoofing detection apparatus 100 includes a multi-channel spectrogram creation unit 10 and an evaluation unit 40. The multi-channel spectrogram creation unit 10 extracts different type of spectrograms from speech data and integrates the different type of spectrograms to create a multi-channel spectrogram. The evaluation unit 40 evaluates the created multi-channel spectrogram by applying the created multi-channel spectrogram to a classifier constructed using labeled multi-channel spectrograms as training data and classifies it to either genuine or spoof.

Abstract: To reduce a decrease in search accuracy in a technique for comparing feature values acquired by collecting a local feature value by patch unit, the present invention provides an image processing apparatus 10 including: an image processing unit 11 that detects an object region occupied by an object in an image; a patch size decision unit 12 that decides a patch size, based on a size of the object region; a patch unit feature value-computation unit 13 that sets a plurality of patches having the patch size described above in the object region, and computes a patch unit feature value acquired by collecting a local feature value in a patch for each patch; and a search unit 14 that searches for an image similar to a query image from among a plurality of reference images by using the patch unit feature value.

Abstract: A suspicious communication detection apparatus includes: a database; a machine learning model that receives features of an encrypted communication and that determines whether the encrypted communication is a suspicious communication; a determination part that refers to the database by using information about a received encrypted communication, enters obtained features about the received encrypted communication to the machine learning model, determines whether the received encrypted communication is a suspicious communication, and stores the determination result for the suspiciousness in the database; and a redetermination part that performs, based on a determination result of an encrypted communication from the inside of the organization to the outside of the organization, a redetermination on a determination result of an encrypted communication from the outside of the organization to the inside of the organization, the determination result being stored in the database.

Abstract: A guidance processing apparatus (100) includes an information acquisition unit (101) that acquires a plurality of different pieces of guidance information on the basis of states of a plurality of people within one or more images, and a control unit (102) that performs control of a plurality of target devices present in different spaces or time division control of a target device so as to set a plurality of different states corresponding to the plurality of pieces of guidance information.

Abstract: A method for performing computation of a function over encrypted data by a computation entity is provided. According to the method, the computation of a quadratic function is performed by the computation entity, the encrypted data are encrypted by a linearly homomorphic encryption scheme, and a homomorphic message authentication code is used for providing verifiable computation on encrypted data.