Abstract:
Disclosed is a device for chip-to-chip wireless power transmission. The device includes: a first transistor that outputs a first output signal; a second transistor that outputs a second output signal having a phase opposite to that of the first output signal; capacitors that each have a first terminal and a second terminal connected the first transistor and the second transistor, respectively; and a transmitting coil that wirelessly transmits AC power outputted through the first and second transistors to a receiving coil of a power receiver.
Abstract:
A mobile device for distinguishing a user's movement, a method therefor, and a method for generating a hierarchical tree model therefor. Particularly, the mobile device includes: an acceleration sensor; a buffer for collecting the acceleration data outputted from the acceleration sensor according to a user's specific movement; an extraction unit for extracting the characteristic elements of the user's specific movement based on the acceleration data collected by the buffer; and a movement judgment unit for determining to which class the user's specific movement belongs by inputting the characteristic elements extracted by the extraction unit into a pre-structured hierarchical tree model, wherein the hierarchical tree model is pre-structured based on the characteristic elements extracted for each movement.
Abstract:
Disclosed is a method for determining an indoor location which includes receiving signals including IDs and information on floors from a plurality of APs that is provided at floors of the multi-story building; measuring reception signal strengths of the received signals, and selecting candidate floors by using the measured reception signal strengths; predicting reception signal strengths of the other candidate floors by using the reception signal strengths of the APs provided at the respective candidate floors; and calculating variance values for the reception signal strengths of the candidate floors, and estimating a current location by using the variance values.
Abstract:
A warning alarm apparatus for a steering wheel includes at least one piezoelectric transducer provided in the rim of the steering wheel; a current supplier; one or more sensors, equipped in the steering wheel or a motor vehicle, sense a dangerous factor; and a controller that determines whether a sensor value sensed by the sensor is included in a warning alarm range, and controls operation of the current supplier according to the sensor value.
Abstract:
Provided is a method and apparatus for authenticating a password, wherein the method includes: generating at least one input grid cell into which a password is input from among a plurality of grid cells realized on a screen of a user terminal; and authenticating the password when the password is identical to a number of identification grid cells included in an authentication range predetermined based on the at least one input grid cell, wherein the identification grid cells are set to authenticate the password from among the plurality of grid cells. Accordingly, password information may be prevented from being exposed to a third person observer since a variable password is input whenever a user tries password authentication in a terminal.
Abstract:
Provided are a system and method for automatically recreating personal media through fusion of multimodal features. The system includes a multimodal fusion analyzer configured to analyze semantics of personal media having various forms based on a plurality of modalities and divide the personal media into media fragments which are the smallest units having semantics, a semantic-based intelligent retriever configured to store and retrieve the divided media fragments by considering the semantics, a personal media recommender configured to learn and analyze a profile of a user through modeling the user, and select and recommend a plurality of media fragments wanted by the user among the media fragments retrieved by the semantic-based intelligent retriever, and a personal media creator configured to create new personal media using the plurality of media fragments recommended by the personal media recommender according to a scenario input by the user.
Abstract:
The present invention relates to an apparatus for eliminating motion artifacts and a method thereof, and the method for eliminating motion artifacts includes steps of receiving a PPG signal and three-axis (X-axis, Y-axis, and Z-axis) acceleration signals measured from an examinee, extracting the PPG signal and the three-axis acceleration signals by a period of a predetermined unit of time and filtering the signals at a preset bandwidth, Fourier-transforming the PPG signal and the three-axis acceleration signals corresponding to the extracted period, arranging power spectra of the X-axis, Y-axis, and Z-axis in ascending order of value of average power spectrum by calculating an average power of each frequency domain of the three-axis accelerations, and extracting a final power spectrum of the PPG signal by sequentially eliminating power spectra of the X, Y, and Z-axis accelerations from the power spectrum of the PPG signal in an order of arrangement.
Abstract:
A transformable wheel includes a wheel frame including a plurality of contact portions and a plurality of recessed portions. A plurality of transforming members is provided wherein one side of each transforming member is rotatably coupled to a corresponding one of the recessed portions and an outer surface of each transforming member forming a portion of the wheel frame. A rotating member is provided at one side surface of the wheel frame, and includes a plurality of transformation locking members arranged radially from the central axis of the wheel frame to correspond to the plurality of transforming members, respectively. A driving member is configured to rotate the rotating members by a preset angle about the central axis of the wheel frame.
Abstract:
An application code hiding apparatus includes a secret code dividing part, a secret code caller generating part, a code analyzing part, a dummy code generating part, a code encrypting part, a code disposing part, a code decryptor generating part, a disposed code importer generating part, a code loader generating part, a memory inner code modifier generating part and a decrypted code caller generating part.
Abstract:
An RFID tag using a physically unclonable function (PUF) generates a response value corresponding to a challenge value, receives an RFID reader ID from an RFID reader, generates a first message authentication code for the RFID reader ID, an RFID tag ID and time information by using, as a secret key, a first response value corresponding to a first challenge value, and transmits, to the RFID reader, the first challenge value, the first message authentication code and the time information of the RFID tag, which are tag identification elements, when the RFID reader ID is received. At this time, the RFID tag shares, with an RFID tag authentication server, the same message authentication code generation function, the RFID tag ID, the first challenge value, and the first response value generated by a PUF module.