Abstract: An apparatus and a method capable of maximally transferring energy generated from an energy harvester apparatus to an output terminal by optimizing an input impedance of an apparatus for extracting maximum power disposed between an energy harvester apparatus and an energy storage apparatus are disclosed. The method for extracting maximum power includes: detecting, by an apparatus for extracting maximum power disposed between the energy harvest apparatus and an energy storage apparatus, a magnitude in output current flowing in the energy storage apparatus; comparing a magnitude in current extracted from the energy harvester apparatus with a magnitude in current supplied to the energy storage apparatus when the magnitude in output current is a positive number; and determining whether an algorithm for extracting maximum power using the magnitude in current based on the comparison result is applied and extracting the maximum power depending on the determination result.

Abstract: Disclosed herein is a solar light-radioisotope hybrid battery, which is used as a solar battery and a radioisotope battery when sunlight is applied, and is used as a radioisotope battery when sunlight is not applied. The solar light-radioisotope hybrid battery includes: a semiconductor layer producing an electron-hole pair; and a radioisotope layer formed on the semiconductor layer and emitting a radioactive ray to the semiconductor layer.

Abstract: Disclosed are a security apparatus and a security system using millimeter-wave communications. The security apparatus comprises a sensing part comprising at least one sensor and providing a detection signal by detecting an intruder; a control part generating intruder detection information according to the provided detection signal; and a communication part transmitting an intruder detection signal including the intruder detection information through a millimeter-wave frequency band. Therefore, a wireless security system can be implemented easily only. Also, it can be made easy to install and manage a security system as compared to configuring a security system by using wired networks, and so installation cost of the security system may be reduced.

Abstract: A hearing-aid apparatus using ultrasonic waves is inserted and mounted within an external auditory meatus of an ear, generates an ultrasonic wave band signal by single side band amplitude modulation of a sound signal that is received through a microphone, and outputs the ultrasonic wave band signal and a carrier signal that is used for single side band amplitude modulation as an ultrasonic wave signal to a transfer medium in a predetermined beam direction. Therefore, the ultrasonic wave signal forms a focal area in a damaged hearing organ area, the ultrasonic wave band signal is restored to a sound signal by nonlinear characteristics of a transfer medium in the focal area, and the damaged hearing organ detects the sound signal.

Abstract: Disclosed is a radar apparatus supporting short range and long range radar operations, wherein a plurality of short range transmitting chirp signals and a plurality of long range transmitting chirp signals are generated by a predetermined modulation scheme and is transmitted to an object through at least one transmitting array antenna and signals reflected from the object is received through at least one receiving array antenna, and the plurality of long range transmitting chirp signals have transmission power larger than that for the plurality of short range transmitting chirp signals.

Abstract: A wafer is provided. The wafer includes at least one field. The field includes at least one chip, and at least one test chip that generates power using a wireless signal, that provides power to the chip, that tests performance of the chip, and that corrects performance of the chip according to a test result.

Abstract: This invention relates to a radioisotope battery and a method of manufacturing the same, wherein manufacturing the radioisotope battery and shielding radiation emitted from the radioisotope Ni-63 from the outside are achieved simultaneously. This radioisotope battery includes a semiconductor layer, a seed layer formed on the semiconductor layer, a radioisotope layer formed on the seed layer, and a radiation shielding layer formed on the radioisotope layer and for shielding radiation of the radioisotope layer form the outside.

Abstract: Disclosed are a method and an apparatus for amplitude modulation of a spread signal that can increase a data transmission rate and frequency use efficiency by loading information on the amplitude of the spread signal used in digital communications. A method for amplitude modulation of a spread signal according to an exemplary embodiment of the present disclosure includes: receiving a first data signal; generating a spread signal by applying a spreading code to the first data signal; receiving a second data signal; and outputting the spread signal at an amplitude corresponding to a value of the second data signal.

Abstract: Disclosed herein are an apparatus and method for controlling smart wear. The apparatus for controlling smart wear includes a motion capture unit, an error information unit, a motion estimation unit, and an actuation unit. The motion capture unit captures a motion of a user using sensors included in the smart wear. Then error information unit generates user error information using reference motion information and the results of the motion capture. The motion estimation unit estimates a subsequent motion of the user using the user error information. The actuation unit controls the smart wear of the user in real time using the estimated subsequent motion and the user error information.

Abstract: There are provided a wireless power transmission device using a frequency multiplier and a method thereof. The wireless power transmission device using the frequency multiplier includes a signal input unit configured to receive a first alternating current (AC) signal, a frequency multiplier configured to output a second AC signal having a higher frequency than the first AC signal using harmonic components of the first AC signal, and a power transmission unit configured to transmit power by receiving the second AC signal. Accordingly, a complex structure in which an AC signal is converted into a DC signal and the DC signal is converted into the AC signal again in order to generate the AC signal for the wireless power transmission can be simplified by the frequency multiplier. Moreover, it is possible to efficiently and wirelessly transmit low power required for ambient scattered sensor nodes.

Abstract: A receiver in a human communication system includes: receiving electrodes including a transmission frame including control frames and data frames; first and second switches connected with the receiving electrodes; a switching control unit controlling a switching of the first and second switches to selectively connect the receiving electrodes with the first and second switches in response to each control frame according to a predetermined rule every time each of the control frames is input; a signal processing unit performing signal processing on the transmission frame output from the first and second switches; a preamble detection unit detecting the first preamble from each of the control frames included in the signal-processed transmission frame to generate preamble correlation values for the first preamble; and a correlation value processing unit controlling the switching control unit to select pairs of final receiving electrodes among the receiving electrodes based on the preamble correlation values.

Abstract: Disclosed are a telematics system using human body communication, a portable device having a telematics function using human body communication, and a method for providing a telematics service using human body communication. The telematics system using human body communication includes: a vehicle receiving an authentication key from at least one portable device through human body communication using a human body as a medium, and controlling the opening and closing of a door of the vehicle based on whether or not the received authentication key is valid; and a first portable device transmitting a first authentication key through a user's body in contact with the vehicle.

Abstract: Disclosed is an energy conversion apparatus. An energy conversion apparatus may comprise a control part controlling a length of a first time duration in which input current is inputted and accumulated, a length of a second time duration in which the accumulated current is provided to a load, and a length of a third time duration in which inverse current flows; and a DC-to-DC converter including an inductor, a output capacitor, and at least one switching element, wherein the input current is accumulated during the first time duration by switching the at least one switching element according to a control of the control part so as to perform input impedance matching, and the DC-to-DC convert provides a current corresponding to a difference between the accumulated current provided during the second time duration and the inverse current flowing from the output capacitor during the third time duration to the load.

Abstract: Disclosed herein are a wearable wireless power transmission apparatus and a wearable wireless power transmission using the same. The apparatus includes a wearable energy harvesting unit, a wearable battery unit, a wearable power charging unit, a wearable power transmission processing unit, and a fiber-type primary coil unit. The wearable energy harvesting unit generates power from at least one of light energy and kinetic energy, and is attachable to fabric. The wearable battery unit stores the power, and is attachable and detachable to and from the fabric. The wearable power charging unit rectifies the power, charges the wearable battery unit, and is attachable and detachable to and from the fabric. The wearable power transmission processing unit generates a transmission signal, and is attachable and detachable to and from the fabric. The fiber-type primary coil unit wirelessly transmits the transmission signal to the secondary coil unit of the power reception terminal.

Abstract: Provided are a method and apparatus for transmitting sound waves in water. The method for transmitting sound waves in water includes generating a sound wave signal, and transmitting the sound wave signal in water, generating a compensation signal for preventing distortion due to water vibration in an audible frequency band, and simultaneously transmitting the compensation signal and the sound wave signal in water. Accordingly, an apparatus for receiving sound signals is not required, and direct contact between a human body and an apparatus for transmitting sound signals is not required, thereby improving convenience of use. In addition, even when a human body is constantly moving, a superior contact condition may be provided, and therefore sound waves may be more effectively transmitted to a user.

Abstract: A frequency selective modulation apparatus and method using re-spreading codes are disclosed. The frequency selective modulation apparatus includes: a serial-to-parallel converter receiving transmission data and performing serial-to-parallel conversion on the transmission data at a pre-set ratio; one or more sub-frequency selective spreaders selecting one spreading code by using data bits received from the serial-to-parallel converter; a majority value selection unit selecting a majority value from one or more spreading codes which have been selected by each of the one or more of the sub-frequency selective spreaders; and a first XOR logic circuit XORing an output of the majority value selection unit and a re-spreading code Wn to re-spread a frequency selective baseband to a frequency selective passband.

Abstract: A walking guidance apparatus using human body communication, including: a first human body communication device acquiring a walking guidance information signal, converting the acquired walking guidance information signal into a signal available for human body communication, and transmitting the converted signal through a user's body; and a second human body communication device receiving the signal transmitted through the user's body from the first human body communication device, converting the received signal into a signal that can be recognized by the user, and outputting the converted signal. Walking guidance information having a high privacy function and high stability and accuracy can be provided to enhance user convenience.

Abstract: The present disclosure enables a user to intuitively recognize a rotation direction of a rehabilitation exercise by giving preset stimuli to a body of the user by using a vibration of the haptic device until the body of the user rotates up to a target point.

Abstract: An electronic apparatus having a control function using human body communication includes: a first control unit reading control data and performing a control to provide the read control data; a first human body communication unit converting the control data into a signal, which is transmittable through human body communication, according to a control signal outputted from the first control unit; an electrode installed in an outer housing of the electronic apparatus and transmitting the signal provided from the first human body communication unit to a user's body which comes into contact with the electronic apparatus; and a first storage unit storing the control data.

Abstract: There are provided a human body sound transmission system and a method. The human body sound transmission system according to an aspect of the present invention directly or indirectly contacts a human body to apply coupled signals of high frequency sound signals with high frequency signals, which recover sound signals from the high frequency sound signals, to the human body and transmit the sound signals using the human body as a transmission medium, wherein a magnitude of the sound signals recovered around a human's ear is increased in proportion to the number of signals transmitted through the human body by transmitting the plurality of signals including the same sound signals through the human body.