Abstract: A digital twin federation system for interoperability and federation between digital twins and an operating method thereof are provided. The digital twin federation system includes single digital twins to be federated, a metadata repository that stores metadata on the single digital twins and a federated digital twin, a federated digital twin generated by federating the single digital twins, and a management device that searches for a single digital twin providing a specific service among the single digital twins from the metadata repository through a search function to determine the single digital twin to be a digital twin for the federated digital twin, generates the federated digital twin where the single digital twins are federated, and generates a tool for providing a service of the federated digital twin, thereby expanding existing services and provide new services by federating digital twins, and easily solving problems involving domains through simulation and visualization.

Abstract: Disclosed are a method and apparatus for connecting a terminal and a base station in a multi-hop network. A method of a terminal may comprise: receiving cell selection and reselection criteria information broadcast from a base station; determining candidate base stations among all base stations capable of communicating with the terminal based on the cell selection and reselection criteria information; selecting one connection scheme from a lightening backhaul load (LBL) scheme or a maximum reference signal received power (RSRP) scheme based on a tolerable gap, which is a parameter for determining the candidate base station; selecting one candidate base station from among the candidate base stations as a target base station based on the one connection scheme; and connecting to the target base station.

Abstract: A computing device inputs a sample generated from an electrocardiogram signal to a heartbeat classification model, generates a feature map from the sample through multiple first layers of the heartbeat classification model, generates an attention mask based on an assistant feature generated from the feature map and the sample, generates a masked feature map by masking the feature map with the attention mask; and performs classification of the sample from the masked feature map through a second layer of the heartbeat classification model.

Abstract: A method for reconfiguring a microservice architecture that performs a mission by combining a plurality of tasks connected through signals may comprise decomposing a combination of tasks associated with a mission as the mission is changed; recombining tasks by varying the combination of the tasks according to connection management information; and performing a changed mission based on the recombined tasks.

Abstract: An energy harvester includes a first core vibrating in a predetermined direction; a second core being U-shaped and having opposite ends facing at least a part of the first core; a pair of magnetic bodies forming a magnetic flux connected between the first core and the second core; and a coil member wound on the second core to generate an induced current due to a magnetic flux change in the second core.

Abstract: Provided is a transmitting/receiving antenna, including: an array antenna including a plurality of element antennas; and a feeding part transmitting a transmitting signal to the plurality of element antennas and receiving a signal received through the array antenna, in which the plurality of element antennas each include a radiation patch and a transmitting port and a receiving port positioned between the feeding part and the radiation patch.

Abstract: An RFID reader, RFID tag, and method thereof for performing a write check of tag data. According to an exemplary embodiment, the RFID reader may include: a transmitter to transmit a write check command to an RFID tag; a receiver to receive a response including a check value of data, which needs a write check, from an RFID tag that has received the write check command; and a controller to perform information transmission and reception processes, and check data written on the RFID tag by using the received response.

Abstract: Disclosed are a high speed wide range RFID tag capable of improving a data transmission speed and a recognition distance between an RFID tag and an RFID reader by controlling a reflected power as multi levels through adjustment of a reflection coefficient in the RFID tag, and a method of controlling the same. The RFID tag includes a data converting unit configured to convert stored RFID serial tag data into a number of multi-level parallel data according to a request of an RFID reader, a reflection coefficient adjusting unit configured to generate a plurality of reflection coefficients corresponding to a number of the converted parallel data, and a transmitting unit configured to transmit a number of the multi-level parallel data according to the generated plurality of tag reflection coefficients through an antenna to the RFID reader.

Abstract: Disclosed herein are an apparatus and method for transmitting and receiving an RFID signal using beamforming. The apparatus for transmitting and receiving a Radio Frequency Identification (RFID) signal using beamforming according to an embodiment includes a reception unit for receiving power and RFID data signals from an RFID reader, a control unit for adjusting opening/closing periods of switches corresponding to respective paths through which the RF data signals pass, thus controlling the paths, and a transmission unit for converting phases of RF data signals, which are distributed and transmitted to the paths, in response to the opening/closing periods of the switches, and then transmitting beams corresponding to the RF data signals while converting a pattern of the beams.

Abstract: Provided is a Radio Frequency Identification (RFID) tag having a plurality of antennas. The RFID tag includes: a plurality of antennas each configured to backscatter received Radio Frequency (RF) signals; a digital and memory circuitry, which once the RF signals are received through the plurality of antennas, is configured to generate a series of programmed encoding signals based on identification information to be transmitted, and to output the generated signals; and a modulator configured to vary power of an uplink signal backscattered through the plurality of antennas based on the encoding signals input from the digital and memory circuitry, in which the modulator operates such that the power of the uplink signal backscattered through each of the plurality of antennas is equal regardless of types of the encoding signals.

Abstract: An RFID reader, RFID tag, and method thereof for performing a write check of tag data. According to an exemplary embodiment, the RFID reader may include: a transmitter to transmit a write check command to an RFID tag; a receiver to receive a response including a check value of data, which needs a write check, from an RFID tag that has received the write check command; and a controller to perform information transmission and reception processes, and check data written on the RFID tag by using the received response.

Abstract: Disclosed herein are a tag transmission apparatus and a signal transmitting method thereof. The tag transmission apparatus converts a plurality of data bits into a symbol, which is one of a plurality of symbols, and multiplies the converted symbol by a square-wave having a predetermined frequency to thereby generate a subcarrier signal. Here, in the case in which the plurality of data bits are n (n is a natural number larger than 2) bits, the number of the plurality of symbols is 2n.

Abstract: The present invention discloses a point converting system, a point converting method, and an apparatus applied to the same. That is, in relation to a point conversion among point companies providing respective point services, a point conversion ratio is determined based on points, which are converted, accumulated, and updated for the respective point companies, and the point conversion is performed according to the determined point conversion ratio, thereby avoiding an imbalance phenomenon in which a majority of points are unevenly converted for specific point companies.

Abstract: Disclosed are an apparatus and a method for transmitting a tag. The apparatus for transmitting a tag converts 2 bits of a plurality of bit data into one symbol using phase information and orthogonal information.

Abstract: An extended Pulse-Interval Encoding (PIE) modulating method in a Radio Frequency IDentification (RFID) system, wherein the method modulates 2-bit transmitted data and comprises: adjusting a length of a symbol according to a value of the first bit of the transmitted data; and adjusting a length of an energy transfer waiting section according to a value of the second bit of the transmitted data.

Abstract: Provided is a method of choosing a communication mode of an RFID device which supports near-field communication and far-field communication, including: interrupting generation of a self RF field signal; determining whether or not an RF field signal for near-field communication is detected; choosing the near-field communication mode when an external RF field signal for near-field communication is detected; and generating the self RF field signal for far-field communication when the external RF field signal for near-field communication is not detected, and choosing the communication mode according to whether or not a response signal is received.

Abstract: Provided is a transmitting/receiving antenna, including: an array antenna including a plurality of element antennas; and a feeding part transmitting a transmitting signal to the plurality of element antennas and receiving a signal received through the array antenna, in which the plurality of element antennas each include a radiation patch and a transmitting port and a receiving port positioned between the feeding part and the radiation patch.

Abstract: A tag of an apparatus for simultaneously identifying massive tags according to the present invention may include an analog circuit unit to communicate with a reader through an analog signal and to receive energy via magnetic coupling with the reader. Further, the tag may include a digital circuit unit to be supplied with power from the analog circuit unit. The digital circuit unit may support a sleep mode for the tag to stand by in a low power state after transmitting an identifier (ID) to the reader and a wait mode for controlling random access to the reader.