Abstract: A secret data matching device includes a memory unit for storing a first secret vector obtained by concealing a first data set and a key data using a determination matrix; an obtaining unit for obtaining a second secret vector by concealing a second data set using the determination matrix; a calculating unit for calculating a residue vector which is a residue when the determination matrix is a modulus, from a difference between the first and second secret vectors; a determination unit for determining whether the first and second data sets are approximate based on the residue vector; an extracting unit for extracting the key data from the residue vector when the first data set and the second data set are approximate; a creating unit for generating a third secret vector by combining the key data and the second secret vector; and a storing unit for storing the third secret vector.

Abstract: The invention relates to a grating coupler and an optical waveguide device having a stripe width that can be easily realized where light is transferred by means of a beam of which the form is close to that of a Gaussian beam. A striped member that becomes a grating and that is formed of a material of which the refractive index is different from that of the core layer is divided into a plurality of sections, and at the same time, the distance between the core layer and the surface of the striped member on the side opposite the surface that faces the core layer is different for each section.

Abstract: An optical modulation device includes: an optical waveguide formed above a substrate; a phase modulator disposed on part of the optical waveguide; a capacitor connected to the phase modulator and including a lower electrode and an upper electrode; a resistor connected in parallel to the capacitor; and an appended part integrated with the upper electrode and electrically connected to the resistor, wherein the appended part is smaller in area than the capacitor (upper electrode).

Abstract: A wireless network deployment method, apparatus and system where the includes: initializing the wireless network to determine a deployment area and the number of access points needing to be deployed; initializing positions of the access points, and dividing the deployment area into grids; calculating a virtual force of each access point based on signal coverage of each grid; calculating a movement position of each point according to the virtual force; performing edge controlling on each point; and terminating processing when a terminating condition is satisfied. A deployment process is simulated as a dynamic physical process, movement of the access points along a direction of a resultant force of all repulsion forces and attractive forces is controlled following the principle that an overlapping covered area produces a repulsion force and an uncovered area produces an attractive force.

Abstract: An optical waveguide module includes an optical waveguide sheet including multiple optical waveguides, and a light-emitting device and a light-receiving device each positioned over a surface of the optical waveguide sheet. At least one of the optical waveguides includes a first mirror, a second mirror, and a slit. The first mirror is configured to reflect light entering the corresponding optical waveguide from its first end to the light-receiving device or to reflect light emitted from the light-emitting device toward the first end of the corresponding optical waveguide. The second mirror is configured to reflect light entering the corresponding optical waveguide from its second end toward the surface of the optical waveguide sheet. The slit is provided between the second mirror and the second end of the corresponding optical waveguide. The corresponding optical waveguide is discontinuous across the slit.

Abstract: A radar apparatus derives (i) first target information of a first target existing in the transmission range of the transmission wave, the first target being a rear end portion of a vehicle and (ii) second target information of a second target existing in the transmission range of the transmission wave, the second target being a portion of the vehicle other than the rear end portion of the vehicle. The radar apparatus calculates a distance difference between the first target and the second target, and predicts, in a case where the first target information of the first target derived in a previous target information derivation process is not derived in a latest target information derivation process, a position of the first target, using the distance difference and the second target information of the second target derived in the latest target information derivation process.

Abstract: An electronic device includes a housing; a plug-in unit that is inserted into the housing and electrically connected to a connection substrate within the housing; a guiding member that includes a retention portion retaining the plug-in unit, the guiding member being moved between a protruding position protruding from the housing to a front side of an insertion direction of the plug-in unit and a retracting position retracting to the housing side, the guiding member being electrically connected to the housing; a biasing member that biases the guiding member to the protruding position; and a conductive member that is positioned between the plug-in unit and the guiding member, the plug-in unit and the guiding member being in a conduction state by the conductive member.

Abstract: A toy according to an embodiment includes a human sensor, a processor configured to change the operation mode to a suppression mode in which an operation for amusing a target is suppressed when the human sensor detects an object.

Abstract: A filter includes a substrate; a signal line formed on the substrate and including an input terminal and an output terminal at either end of the signal line; and a first pair of resonant lines connected between the signal line and a ground portion, wherein the first pair of resonant lines are connected to the signal line at the same point.

Abstract: An RB includes a grouping unit that groups VLANs in a TRILL network into patterns by using the low 3 bit sequence of a VLANID; a calculating unit that calculates the number of redundant paths with equal costs among physical paths in the TRILL network; and a sorting unit that sorts the patterns of VLANs, which are to be assigned to the physical paths, into the groups that are equivalent to the number of redundant paths according to a predetermined order. The RB includes an assignment table for managing, with respect to each of the groups, an assignable output destination path among the physical paths. The RB includes a control unit that refers to the assignment table, determines the output destination path for each of the groups, and collectively assigns all the VLANs of all the patterns of an appropriate group to the output destination path of the group.

Abstract: A wireless communication system using cells to provide wireless access to services, comprising a first base station installed on board a public transportation vehicle to provide a moving cell, and a second base station installed at a stop at which users enter or leave the vehicle, to provide a fixed cell. A central controller guides handovers of users entering or leaving the vehicle. The first and second base stations to provide data concerning users to the central controller, and the central controller, over many journeys of the vehicle, gathers profile data of users based on the data provided by the base stations. As the vehicle approaches a stop, the central controller makes predictions about users likely to enter and leave the vehicle, and, provides guidance to the first and second base stations for performing handovers.

Abstract: An optical functional device includes: a photodetector; a first optical waveguide which is connected to one end face of the photodetector; and a second optical waveguide which is connected to the other end face of the photodetector. The photodetector is formed in a multi-mode interferometer and has electrodes. Light input from the first optical waveguide to the photodetector focuses image at a position physically away from the second optical waveguide, and light input from the second optical waveguide to the photodetector focuses image at a position physically away from the first optical waveguide.

Abstract: A mobile station reports, based on a known signal transmitted from a base station, channel state information to the base station and performs wireless communication with the base station by spatial multiplexing. The mobile station includes: a calculating unit that calculates first precoding information corresponding to first channel state information and used in horizontal direction beam formation in the base station, second precoding information corresponding to second channel state information, and third precoding information corresponding to both of the first channel state information and the second channel state information and used in vertical direction beam formation in the base station; and a report control unit that reports the first precoding information and the third precoding information in reporting the first channel state information, and reports the second precoding information without reporting the third precoding information in reporting the second channel state information.

Abstract: A data processing method performed by a first processor configured to control a second processor that performs a process of creating an image and has a plurality of operation modes with different power consumption levels, the data processing method includes setting a number related to a second period following a first period based on a number of first images created by the second processor during the first period; and switching an operation mode of the second processor to an operation mode in which power consumption is lower than a power consumption of an operation mode during creating the image, among the plurality of operation modes, when the number of second images created during the second period reaches the set number.

Abstract: A transmission quality estimation method estimates a transmission quality of a target path. The method includes: storing path transmission quality values that respectively indicate transmission qualities of paths established between adjacent nodes in a first storage; storing a node transmission quality value that indicates a transmission quality of a node device in a second storage; estimating a transmission quality of the target path based on the path transmission quality values stored in the first storage and the node transmission quality value stored in the second storage; calculating the node transmission quality value based on the estimated transmission quality of the target path; and updating the node transmission quality value stored in the second storage using the calculated node transmission quality value.

Abstract: A file management apparatus accommodates removable storage media that store index data for use by a file system. The file management apparatus is used to read and write in these removable storage media. An information processing apparatus obtains and holds index data of each removable storage medium from the file management apparatus, and uses the index data to distinguish files recorded in the removable storage media. The file management apparatus determines the right time to make a backup of index data, based on a recovery time objective that specifies a duration of time for recovery from a system failure, and sends out a timing message indicating the determined right time. In response, the information processing apparatus causes the file management apparatus to make a backup in a specified removable storage medium.

Abstract: A wireless communications system includes a first wireless apparatus; and a second wireless apparatus. In a case of receiving from the second wireless apparatus, a random access preamble in an initial access of the second wireless apparatus to a first cell of the first wireless apparatus, the first wireless apparatus transmits a response signal for the random access preamble, the response signal including an instruction to change a connected cell to a cell different from the first cell. The second wireless apparatus transmits based on the instruction included in the response signal transmitted from the first wireless apparatus, a random access preamble in an initial access to a second cell different from the first cell.

Abstract: A controller controlling radio transmission of a plurality of radio devices in a radio communication system in which each of the plurality of radio devices constituting a cluster transmits data with a same frequency and with transmission weights each of the plurality of radio devices to a terminal device belonging to the cluster, the controller includes, an acquisition unit configured to acquire radio propagation characteristics between the terminal device and the each of plurality of radio devices, a determination unit configured to determine radio a plurality of devices constituting the cluster to which the terminal device belongs, based on the acquired radio propagation characteristics, and a control unit configured to determine transmission weights of each of the plurality of radio devices constituting the cluster, based on the radio propagation characteristics of each of the plurality of radio devices constituting the cluster.

Abstract: A voltage detecting device according to an aspect of embodiments includes a detecting unit and a mode switching unit. The detecting unit detects voltages of battery cells of a battery stack in which the battery cells are connected to each other. The mode switching unit switches between an active mode in which the detecting unit detects the voltages and a standby mode in which a current flowing into the detecting unit is less than a predetermined value. Moreover, the detecting unit includes a voltage detecting unit that detects the voltages of the battery cells and/or a voltage of a power supply of the detecting unit in a predetermined interval. The mode switching unit switches between the active mode and the standby mode in accordance with a timing at which the voltage detecting unit detects the voltage (s).

Abstract: In a storage system, when there is a power failure for a power supply, a control unit of a master apparatus does not have all of the dirty data stored in the cache regions of a plurality of storage control apparatuses stored into their nonvolatile memories and instead has part of the dirty data stored from mirror cache regions of adjacent storage control apparatuses into their nonvolatile memories. When doing so, the ratio between the amount of data stored from a cache region and the amount of data stored from a mirror cache region is decided so that the differences in the amount of data stored in the respective nonvolatile memories are within a predetermined range.