Abstract: Provided is an electromyogram (EMG) signal-based user authentication apparatus and method. The apparatus includes an EMG signal receiver configured to receive an EMG signal measured using an EMG sensor, a pre-processor configured to remove a partial signal from the received EMG signal according to a preset frequency band, and a controller configured to authenticate a user by comparing a pre-stored EMG signal with the EMG signal in which the partial signal has been removed.

Abstract: A novel antimicrobial peptide derived from LL37 peptide has not only an excellent antimicrobial activity for Gram-positive bacteria, Gram-negative bacteria, and antibiotic tolerant bacteria but also low cytotoxicity for cells derived from mouse or human. It can be advantageously used as an effective component of antimicrobial antibiotics, cosmetic composition, food additive, animal feed additive, biopesticides, and quasi-drug.

Abstract: Provided are a method and apparatus for location estimation of terminals in a wireless communication system. A method of operating a positioning apparatus may include (a) calculating distances between a terminal and first, second, and third base stations, (b) creating first, second, and third circles centered at locations of the first, second, and third base stations with radii corresponding to the distances, (c) calculating intersection distances between two intersections formed by the second circle, which is the smallest circle, and one of the first circle and the third circle and the other two intersections formed by the first circle and the third circle, and (d) determining one of the intersections corresponding to the shortest distance among the intersection distances as the terminal's location.

Abstract: A wearable energy generating apparatus includes a flexible substrate, and a flexible electrode part having a first electrode attached to one surface of the flexible substrate, and coated with a negatively charged material, and a second electrode attached to one surface of the flexible substrate, and spaced apart from the first electrode by a predetermined interval. The negatively charged material coated on a surface of the first electrode may directly contact a human body that is a positively charged object, and the second electrode may directly contact the skin of the human body.

Abstract: Disclosed are an apparatus for detecting in-vehicle external data intrusion by comparing multiple information entropy and a method of operating the same. The present invention may prevent a danger due to in-vehicle external data intrusion by providing a technology that may determine whether in-vehicle external data intrusion occurs by checking information entropy representing the amount of information for a package ID generable through an in-vehicle Controller Area Network (CAN) communication network.

Abstract: A method for measuring and analyzing blood pressure using PPG includes receiving, by a computer, a PPG signal from a finger of a subject, dividing, by the computer, a normalization pulse wave signal derived from the received PPG signal into one or more predetermined windows, extracting, by the computer, a maximum lower amplitude value from one of the respective divided windows, extracting, by the computer, a target feature pattern from the extracted maximum lower amplitude value, deriving, by the computer, a first target unique vector and a second target unique vector with respect to the target feature pattern, using a linear discriminant analysis (LDA) algorithm to display the first target unique vector and the second target unique vector of the target feature pattern on 2-dimensional (2D) graph, and providing, by the computer, a blood pressure state of the subject, using the 2D graph.

Abstract: Disclosed is an eddy current inspection device for nondestructive testing. The device includes: a bobbin-shaped coil configured to be inserted into a specimen, which is an object of nondestructive testing, and to apply induction current to an inner diameter of the specimen; a reference coil configured to be inserted into a nondestructive specimen, which is a reference of the specimen, and to apply induction current to an inner diameter of the nondestructive specimen; a cylindrical manual sensor array configured to disposed in the bobbin-shaped coil and to include lines and rows; and a control module configured to select one or more frequencies of multiple frequencies, apply AC power to the bobbin-shaped coil and the reference coil, generate a square wave signal with a varying phase difference, and perform first multiplication by an applied signal and the square wave signal. Accordingly, it is possible to accurately detect a flaw.

Abstract: Provided is an electronic signature technique depending on a diametrically different algorithm from the existing asymmetric key infrastructure electronic signature technique which generates predetermined syndrome data based on a message to be transmitted a data receiving device and then detects an error vector for an electronic signature from the syndrome data by using a parity check matrix and then generates an electronic signature value based on an error vector for the electronic signature and transmits the generated electronic signature value to the data receiving device.

Abstract: The present disclosure relates to an expandable cover unit including a main body, a manipulation member installed on the main body to be rotatable or moveable upward or downward, an expanding portion installed on the main body at a position adjacent to the manipulation member and provided with at least one wing member installed on the main body to be slidable in a direction away from the manipulation member such that an end portion of the wing member protrudes outward from the main body, and a wing driving unit configured to operate the wing member to move the wing member according to the manipulation member rotated or moved upward or downward by a manipulation of a user.

Abstract: Provided are a method and apparatus for location estimation of terminals in a wireless communication system. A method of operating a positioning apparatus may include (a) calculating distances between a terminal and first, second, and third base stations, (b) creating first, second, and third circles centered at locations of the first, second, and third base stations with radii corresponding to the distances, (c) calculating intersection distances between two intersections formed by the second circle, which is the smallest circle, and one of the first circle and the third circle and the other two intersections formed by the first circle and the third circle, and (d) determining one of the intersections corresponding to the shortest distance among the intersection distances as the terminal's location.

Abstract: A fibrous energy harvesting device having a corrugated structure includes a first fiber layer acting as an electrified body for generation of triboelectric energy, and a second fiber layer acting as an electrified body for generation of triboelectric energy. The first fiber layer is attached to an upper surface of the second fiber layer and has a corrugated structure.

Abstract: Disclosed herein are a probe for a nondestructive testing device using a crossed gradient induced current and a method of manufacturing an induction coil for a nondestructive testing device. The probe for a nondestructive testing device using a crossed gradient induced current includes an induction coil formed to have a predetermined width and to generate first and second induced currents in a direction crossing each other when a current is applied from a power supply, and a magnetic sensor part installed adjacent to the induction coil so as to measure the first and second induced currents induced from the induction coil.

Abstract: Disclosed is an electronic device for performing code-based encryption supporting integrity verification of a message and an operating method thereof. When a data transmission side encrypts a message through code-based encryption and transmits the encrypted message to a data reception apparatus, the data transmission side is allowed to use a hash value generated based on a part of the message as an error in code-based encryption to support the data reception apparatus to verify an integrity of a received message by using the hash value.

Abstract: An apparatus for monitoring a biosignal of a cyclist includes an electrocardiogram measuring sensor measuring an electrocardiogram signal of a cyclist, an electromyogram measuring sensor measuring an electromyogram signal of the cyclist, and a determination module determining muscle fatigue of the cyclist, based on at least one of a change in a heart rate of the measured electrocardiogram signal and a change in a frequency component of the measured electromyogram signal.

Abstract: Disclosed are a data encryption apparatus and a data encryption method using an encryption key based on puncturing of a generator matrix. Bit values located in a column at a specific point are punctured from a generator matrix of a Reed-Muller (RM) code and thereafter, encryption of a message is performed through a public key generated by using the punctured generator matrix to defend an attack from a third party based on a structure of the RM code by change of the structure of the generator matrix, thereby solving security vulnerability caused as the existing McEliece encryption system uses the generator matrix of the RM code having a special structure as it is.

Abstract: Disclosed is an eddy current inspection device for nondestructive testing. The device includes: a bobbin-shaped coil configured to be inserted into a specimen, which is an object of nondestructive testing, and to apply induction current to an inner diameter of the specimen; a reference coil configured to be inserted into a nondestructive specimen, which is a reference of the specimen, and to apply induction current to an inner diameter of the nondestructive specimen; a cylindrical manual sensor array configured to disposed in the bobbin-shaped coil and to include lines and rows; and a control module configured to select one or more frequencies of multiple frequencies, apply AC power to the bobbin-shaped coil and the reference coil, generate a square wave signal with a varying phase difference, and perform first multiplication by an applied signal and the square wave signal. Accordingly, it is possible to accurately detect a flaw.

Abstract: The present disclosure relates to a microwave reforming apparatus for gas reforming, and provides a new technology of converting carbon dioxide which is a main greenhouse gas generated during combustion, pyrolysis/gasification, and operation of fossil fuels, methane, and dispersions thereof into high-quality fuels. A microwave reforming apparatus according to the present disclosure uses a carbon receptor and thus can solve the conventional problem of price of catalyst and also enables compactification of a device, rapid startup and response time in several seconds, and application of various kinds of product gases including polymer hydrocarbon. Also, the microwave reforming apparatus according to the present disclosure uses its own internal reaction heat at the time of reforming and thus can maintain the optimum operating conditions for a wide range of flow rate and gas properties.

Abstract: An apparatus for charging a mobile terminal includes an energy harvesting device provided in shoes and generating energy generated by a movement of a human body, a charge control module attached to trousers and controlling charging of a mobile terminal using energy harvested by the energy harvesting device, and a resonant coil module wirelessly transmitting energy harvested by the energy harvesting device to the charge control module, wherein the resonant coil module includes a transmission resonant coil unit provided in the shoes and a reception resonant coil unit provided in the trousers, spaced apart from the transmission resonant coil unit by a predetermined distance, and magnetically coupled to the transmission resonant coil unit.

Abstract: The present invention relates to an antibacterial and fungicidal peptide in which a lysine and tryptophan dipeptide is repeated. More specifically, the antibacterial and fungicidal peptide of the present invention, in which lysine and tryptophan dipeptide is repeated four times, shows excellent antibacterial activities with respect to gram-positive bacteria, gram-negative bacteria and antibiotic-resistant strains by affecting the inner membrane of harmful microorganisms, has remarkable fungicidal activities with respect to pathogenic fungi and antibiotic-resistant fungi, and shows little cytotoxicity, and thus can be useful for a pharmaceutical composition, a cosmetic composition, agricultural chemicals, a food preservative, a cosmetic preservative, and a pharmaceutical preservative.

Abstract: Disclosed is a method of measuring red blood cell membrane fluctuations based on dynamic cell parameters using a digital holographic microscope; the method including a step of modeling the three-dimensional images of red blood cells to be measured, and a step of measuring red blood cell membrane fluctuations based on the three-dimensional images. According to this method, since the three-dimensional images of red blood cells to be measured are modeled and red blood cell membrane fluctuations are measured based on the three-dimensional images, red blood cell membrane fluctuations can be measured more easily.