Abstract: A propagation model estimation system according to an embodiment includes a selection unit that selects an area for which a radio wave propagation model is to be estimated, a modeling unit that models a radio wave reflection characteristic in the selected area, a determination unit that determines a scale ratio of the selected area, a frequency scale model based on the scale ratio, and at least one material based on the modeled radio wave reflection characteristic and the frequency scale model, a creation unit that creates an area scale model in which a structure in the selected area is reduced at the scale ratio using the material by means of a 3D printer, an arrangement unit that arranges, in the area scale model, at least one transmitting station that transmits a radio wave based on the frequency scale model and at least one receiving station that receives the radio wave transmitted by the transmitting station while moving, a measurement unit that measures a propagation characteristic of the radio wave rec

Abstract: An isoprene-based polymer latex composition includes a chloroprene polymer latex (A) and an isoprene polymer latex (B), in which the chloroprene polymer has a z-average particle size of 180 nm or greater and smaller than 300 nm, and a tetrahydrofuran-insoluble fraction of 80 to 99% by mass; the chloroprene polymer latex (A) is (1) a copolymer latex of chloroprene (A 1) and 2,3-dichloro-1,3-butadiene (A-2-1), or (2) a copolymer latex of the above (A-1) and (A-2 1), and another monomer (A-2-2); and the copolymer is obtained by copolymerization in which the ratio of 2,3-dichloro-1,3-butadiene (A-2-1) is 5.0 to 30.0% by mass relative to the total amount of the monomer components chloroprene (A-1) and 2,3-dichloro-1,3-butadiene (A-2-1) of 100% by mass. The isoprene-based polymer latex composition's quality is maintained, and the properties after cross-linking of a molded product obtained by dipping a dipping former into the composition multiple times do not deteriorate.

Abstract: The position estimation device includes a wireless communication control unit that determines a transmission command and transmits the transmission command to a wireless communication unit of a fixed terminal installed in the same environment as a host device or a wireless communication unit of a position estimation target, a wireless communication unit that receives a wireless signal or the wireless communication unit based on the transmission command and acquires channel information regarding radio wave propagation from the wireless signal, an input feature amount generation unit that converts the channel information into an input feature amount inputtable to a position estimation model, and a position estimation model using unit that estimates and calculates a position of the position estimation target by inputting the input feature amount to a position estimation model obtained by modeling a relationship between channel information and position information by machine learning.

Abstract: A reflection unit of a relay apparatus includes a plurality of reflection elements capable of applying independent phase shifts to an incoming wave from a transmission point. The reflection unit estimates a distance between the relay apparatus and a reception point based on terminal information transmitted from the reception point. The number of divisions for grouping the plurality of reflection elements is determined based on the distance. The plurality of reflection elements are grouped into one or more reflection element groups according to the division number. The position of the reception point is estimated based on the terminal information. Each of the reflection element is applied a phase weight so that each of the reflection element groups generates a beam toward the position of a reception point.

Abstract: A communication method includes performing authentication through data communication encrypted by a first encryption scheme by a first processor installed outside a storage box in an automatic teller machine and a second processor installed in the storage box, and transmitting an instruction to the second processor through data communication encrypted by a second encryption scheme, in a case where the authentication has been performed normally by the first processor.

Abstract: A user data rate estimation device acquires a reception power in a user, and receives input of information regarding a communication environment of the user. Next, the device calculates a wireless resource to be allocated to the user on the basis of information regarding a bandwidth, a scheduling method, and the number of users included in the information regarding the communication environment, calculates an overhead on the basis of information regarding a communication standard, a frequency band, and a bandwidth included in the information regarding the communication environment, and determines a communication mode on the basis of the reception power or communication quality information converted from the reception power. Then, the device calculates a user data rate on the basis of the wireless resource, the overhead, the communication mode, and information regarding the number of spatial streams included in the information regarding the communication environment.

Abstract: In a wireless communication system, a base station device communicates with a terminal device via any relay device (reconfigurable intelligent surface). The base station device stores a CSI when passing through the relay device in association with the object arrangement information. When the current object arrangement information is similar to the stored past object arrangement information, the base station device determines a relay device to be used at the present time on the basis of each CSI stored in association with the past object arrangement information. According to this, it is possible to reduce overhead for acquiring the CSI, and simultaneously execute the use determination of the plurality of reconfigurable intelligent surfaces, by re-using the CSI.

Abstract: A wireless communication method of the present disclosure is a wireless communication method in which dual connectivity between a plurality of transmission points and user terminals is used. In the wireless communication method of the present disclosure, a radio link is generated using at least one dynamic reflector between each of a plurality of transmission points and a user terminal. Also, in the wireless communication method of the present disclosure, different data streams are transmitted from the plurality of transmission points to the user terminal via at least one dynamic reflector.

Abstract: A relay apparatus includes a plurality of reflection elements that applies independent phase shifts to an incoming wave, a communication circuitry that receives transmission point information from one or more transmission points, an element allocation circuitry, and a phase control circuitry. The element allocation circuitry determines the number of communication links to be established via the relay apparatus based on the transmission point information, determines the number of reflection elements to be allocated to each of the communication links, and determines a reflection element to be allocated to each of the communication links according to the number of the reflection elements. The phase control circuitry determines the phase weights so that a beam directed to a reception point being a communication destination of each communication link is generated by a reflection wave generated by each reflection element allocated to each of the communication links.

Abstract: The amusement device according to the present disclosure includes: a laser irradiation unit 1 that emits a laser beam; a reflector 3 that reflects the laser beam emitted from the laser irradiation unit 1; and a laser light receiving unit 2 that serves as a target onto which the laser beam emitted from the laser irradiation unit 1 is incident. The amusement device according to the present disclosure further includes an obstacle 5 that can block the laser beam emitted from the laser irradiation unit 1. The laser irradiation unit 1 is configured to enable the emission direction of the laser beam to be changed by an operation by a user. The reflector 3 is configured to enable the direction of a reflection surface to be changed by an operation by the user. The obstacle 5 is configured to be movable by an operation by the user.

Abstract: A transmission space reproduction method according to an embodiment includes: a propagation characteristics calculation step of performing simulation while sequentially changing a parameter in a reverberation chamber used to reproduce propagation characteristics so as to calculate propagation characteristics in the reverberation chamber, a machine learning step of forming a learning model for a calculated parameter by machine learning using actually measured propagation characteristics and parameters, a parameter generation step of generating a parameter corresponding to propagation characteristics to be reproduced using the formed learning model, and a reproduction execution step of controlling a channel emulator based on the generated parameter so as to perform processing of forming a transmission space having the propagation characteristics to be reproduced in the reverberation chamber.

Abstract: Provided is a design maintenance system that gives game-like elements to design maintenance work of wireless equipment. A design maintenance tool used by a worker transmits wireless information such as a channel number measured in accordance with the design maintenance work to a design maintenance server. A game execution unit of the design maintenance server digitizes the received wireless information to generate a progress value necessary for progress of a game. A transmission unit of the design maintenance server transmits the progress value of the game to the design maintenance tool. The design maintenance tool progresses the game by using the received progress value, and displays a progress state to workers.

Abstract: There are provided a plurality of radio devices detecting an interference source signal transmitted by an interference source and generating pieces of air time information showing whether the interference source signal exists or not for each predetermined time unit; and an aggregation device estimating air time of the interference source by acquiring the pieces of air time information from the plurality of radio devices and aggregating/integrating the acquired pieces of air time information for each predetermined unit time, matching timings.

Abstract: An image processing device includes a hardware processor. The hardware processor designates, from one frame image of a dynamic image acquired by dynamic imaging of a movement of a locomotorium, a plurality of regions or points on a structure included in the locomotorium, sets an alignment reference based on the designated regions or points, tracks the designated regions or points in a plurality of frame images of the dynamic image, aligns a line segment connecting the regions or the points to each other in the plurality of frame images based on the alignment reference, and causes a display to display the line segment so as to be superimposed on a representative frame image of the dynamic image.

Abstract: A wireless terminal connection control method evaluates QoE prior to connection of a wireless terminal to a wireless LAN, and permits connection to the wireless LAN in a case where QoE of a predetermined level or higher can be guaranteed. First, a QoE value indicating the wireless communication quality felt by the user is received from each wireless terminal connected to the wireless LAN access point. Next, an overall QoE value is calculated based on each received QoE value. Then, connection between the wireless LAN access point and the wireless terminal in the non-connected state is permitted in a case where there is a connection request from the wireless terminal in the non-connected state to the wireless LAN access point to the wireless LAN access point and in a case where the overall QoE value is equal to or greater than a threshold value.

Abstract: Provided is a management device that performs wireless communication with a fixed terminal fixed in an environment, or performs wireless communication with the fixed terminal and a position estimation target, and manages a state of a wireless communication unit that performs wireless communication. The management device includes one or more wireless communication units that receive a wireless signal from a wireless communication unit, an input feature generation unit that converts channel information corresponding to the plurality of wireless communication units into a plurality of input features that can be input to a machine learning model, a position estimation model utilization unit that estimates and calculates a position of the position estimation target, and a model evaluation unit that outputs identification of whether or not an abnormality has occurred in any one of the wireless communication units.

Abstract: A predetermined radio base station and subordinate radio terminals detect signals (beacons) regularly transmitted by other radio base stations, transmit information about radio channels and base station identifiers of the detected signals, and position information about the radio terminals to an interference area detection device to aggregate the information and the position information as a base station-base station detection list and a terminal-base station detection list.

Abstract: A wireless communication system includes a terminal device and a control device that controls a wireless communication device that is used in wireless communication with the terminal device. The wireless communication device includes an electromagnet. The terminal device includes a magnetic sensor. The control device switches on and off the electromagnet. The control device acquires information on a first magnetic field detected by the magnetic sensor from the terminal device, when the electromagnet is off. The control device acquires information on a second magnetic field detected by the magnetic sensor from the terminal device, when the electromagnet is on. The control device estimates a direction from the wireless communication device to the terminal device based on a difference between the first magnetic field and the second magnetic field.

Abstract: A bill handling apparatus enables insertion of a deposited object therein from an insertion slot, the object including a bill containing a metallic component. The bill handling apparatus includes a memory and processing circuitry coupled to a memory and configured to estimate a number of bills in the object that has been inserted, obtain an actually measured metal quantity in the object that has been inserted, estimate a threshold that is a quantity of metal in the object that has been inserted, based on the number of bills estimated by the first estimating and a reference metal quantity corresponding to one of the bills, the reference metal quantity having been determined beforehand, make a comparison between the actually measured metal quantity and the threshold, and determine, based on a result of the comparison, whether or not the object that has been inserted is a bill or bills only.

Abstract: Provided is a position estimation method in which a measurement signal and a response signal are transmitted and received between multiple n wireless stations respectively provided with known antennas installed at known positions different from each other and a wireless terminal station provided with a terminal antenna, RTT, which is a round-trip delay time of the transmission and reception, and RSSI, which is a strength of received radio waves of the signals, are measured, and a position of the wireless terminal station is estimated. The method includes: obtaining, as the position of the wireless terminal station, a solution of simultaneous equations of an RTT evaluation function fti for evaluating the estimate value of the position of the wireless terminal station that is estimated based on the RTT measured between the wireless terminal station and the known antenna i (i=1, 2, . . .