Abstract: The present invention relates to stem cell-derived mature cardiomyocytes and a cardiovascular disease model using same and, more specifically, to differentiation into mature ventricular cardiomyocytes by culturing stem cells in a medium containing FGF4 and ascorbic acid, and use of the differentiated mature ventricular cardiomyocytes as a cardiovascular disease cell model. The mature ventricular cardiomyocytes, obtained by culturing stem cells in a medium containing FGF4 and ascorbic acid and inducing the differentiation thereof, and cardiovascular disease cell model using same according to the present invention are very useful for screening for cardiovascular disease therapeutic agents and evaluation of the toxicity of new drugs.

Abstract: Disclosed is an electronic apparatus for measuring a biometric signal, the electronic apparatus including: a measurer comprising measuring circuitry configured to measure a biometric signal of a person to be examined, and to generate a measured signal having a waveform corresponding to a characteristic of the biometric signal; a signal processor configured to process the generated measured signal; and a controller configured to control the signal processor to generate a compressed signal by compressing the measured signal and at least one piece of characteristic information included in a waveform of the measured signal, when the measured signal is compressed. Thus, a measured biometric signal is efficiently compressed while reducing a loss of main characteristic information.

Abstract: A method for obtaining an elastic feature of an object includes inducing a first shear wave in the object by transmitting a first push ultrasound signal which is generated by a probe of an ultrasound apparatus and a first grating lobe signal which relates to the first push ultrasound signal toward the object, transmitting a tracking ultrasound signal to an area of the object where the first shear wave has propagated, receiving, from the object, a reflection signal which relates to the tracking ultrasound signal, measuring a first shear wave parameter which indicates a shear wave characteristic of the first shear wave based on the reflection signal, and obtaining an elastic feature of the object by using the first shear wave parameter.

Abstract: An ultrasound system and a clutter filtering method thereof are provided. The clutter filtering method includes: transmitting an ultrasound signal to an object; receiving a reflection signal reflected from the object; performing a singular value decomposition (SVD) on a plurality of doppler signals constituting the reflection signal; dividing a representation of the object into a plurality of regions according to a result of performing the SVD; determining cutoff frequencies of the plurality of regions according to different methods; and performing clutter filtering on the plurality of regions by using the determined cutoff frequencies.

Abstract: Disclosed herein is an ultrasound apparatus, a control method thereof, and a telemedicine system, the ultrasound apparatus including an ultrasound transducer configured to receive a reflected ultrasound signal and a signal processor configured to generate an ultrasound image using a first frequency band signal of the received ultrasound signal, and to generate additional information using a second frequency band signal of the received ultrasound signal.

Abstract: Disclosed is an electronic apparatus for measuring a biometric signal, the electronic apparatus including: a measurer comprising measuring circuitry configured to measure a biometric signal of a person to be examined, and to generate a measured signal having a waveform corresponding to a characteristic of the biometric signal; a signal processor configured to process the generated measured signal; and a controller configured to control the signal processor to generate a compressed signal by compressing the measured signal and at least one piece of characteristic information included in a waveform of the measured signal, when the measured signal is compressed. Thus, a measured biometric signal is efficiently compressed while reducing a loss of main characteristic information.

Abstract: A method for obtaining an elastic feature of an object includes inducing a first shear wave in the object by transmitting a first push ultrasound signal which is generated by a probe of an ultrasound apparatus and a first grating lobe signal which relates to the first push ultrasound signal toward the object, transmitting a tracking ultrasound signal to an area of the object where the first shear wave has propagated, receiving, from the object, a reflection signal which relates to the tracking ultrasound signal, measuring a first shear wave parameter which indicates a shear wave characteristic of the first shear wave based on the reflection signal, and obtaining an elastic feature of the object by using the first shear wave parameter.

Abstract: A method of generating an ultrasound image includes transmitting an ultrasound signal to a predetermined point included in an object and receiving at least three response signals reflected from the predetermined point; extracting a plurality of response signal pairs by combining the received at least three response signals two-by-two; obtaining a plurality of pieces of prediction vector information, each of the pieces of prediction vector information indicating a prediction velocity magnitude and a prediction velocity direction of the predetermined point, based on reception angles and Doppler frequencies of the response signals included in the plurality of response signal pairs; and determining vector information indicating a velocity magnitude and a velocity direction of the predetermined point, based on the plurality of pieces of prediction vector information.

Abstract: A blood vessel analysis information providing method includes emitting an ultrasonic signal on a body portion where a blood vessel exists and sensing a reflected ultrasonic signal, generating a color mode image by using the reflected ultrasonic signals, and determining diameters of the blood vessels based on pixel values of the generated color mode image.

Abstract: A method of detecting an electrocardiogram signal is disclosed. The method includes measuring an electrocardiogram signal, determining a wave period based on an inclination of the measured electrocardiogram signal, and detecting an apex of the electrocardiogram signal with at least one of a maximum size and inclination in the wave period.

Abstract: A method of recognizing speech is provided. The method includes the operations of (a) dividing first speech that is input to a speech recognizing apparatus into frames; (b) converting the frames of the first speech into frames of second speech by applying conversion rules to the divided frames, respectively; and (c) recognizing, by the speech recognizing apparatus, the frames of the second speech, wherein (b) comprises converting the frames of the first speech into the frames of the second speech by reflecting at least one frame from among the frames that are previously positioned with respect to a frame of the first speech.

Abstract: An ultrasound system and a clutter filtering method thereof are provided. The clutter filtering method includes: transmitting an ultrasound signal to an object; receiving a reflection signal reflected from the object; performing a singular value decomposition (SVD) on a plurality of doppler signals constituting the reflection signal; dividing a representation of the object into a plurality of regions according to a result of performing the SVD; determining cutoff frequencies of the plurality of regions according to different methods; and performing clutter filtering on the plurality of regions by using the determined cutoff frequencies.

Abstract: An apparatus for estimating a Direction of Arrival (DOA) of a wideband includes a first signal receiving unit and a second signal receiving unit to receive a wideband signal while satisfying d?Mc/2fs, wherein ‘d’ denotes a distance the first signal receiving unit and the second signal receiving unit are spaced apart from each other, ‘c’ denotes the speed of sound, ‘M’ denotes a number of wideband frequencies being a number of fast Fourier transformation (FFT) points of a wideband signal, and ‘fs’ denotes a sampling frequency, and a DOA calculating unit to calculate a DOA (?) using a normalized frequency ( f) which is obtained by performing an FFT on the respective wideband signals transmitted from the first signal receiving unit and the second signal receiving unit, and using the distance d.

Abstract: A microphone signal compensation apparatus includes a plurality of audio input units to respectively receive a target signal, each audio input unit of the plurality of audio input units including a microphone; a constant filter unit to selectively apply a constant filtering calibration scheme to signals output by the plurality of audio input units to compensate for a difference in at least one characteristic among the audio input units, the constant filtering calibration scheme being estimated from an average value of a ratio of a desired signal to a reference signal among the signals output by the plurality of audio input units; and a noise remover to remove noise from the signals processed by the constant filter unit, and to separate the target signal from the signals from which the noise has been removed.

Abstract: The present invention provides a composition for crown material including resin and a fine spherized composite glass powder. The fine composite glass powder of the present invention for such a configuration has superior qualities with regard to both sintering and optical characteristics, and can be used as a filler for crown material.

Abstract: A personal sound zone creating apparatus includes a broadside array adapted to generate a sound beam orthogonal to an arrangement of an array constituted by at least three transducers in a personal audio device. Therefore, the personal sound zone creating apparatus controls rear radiation by including an end-fire array increased in directivity in a horizontal direction.

Abstract: The present invention relates to a method of manufacturing titania nanoparticles, and specifically to a method of manufacturing titania nanoparticles wherein the particle size is uniform, it is possible to manufacture monodisperse particles without aggregation among particles, a uniform coating can be applied, that is suitable to large-scale production, and that can obtain high-resolution images by maintaining the toner electric charge and electric charge distribution; and the developer included in said titania nanoparticles.

Abstract: The present invention relates to a method of manufacturing titania nanoparticles, and specifically to a method of manufacturing titania nanoparticles wherein the particle size is uniform, it is possible to manufacture monodisperse particles without aggregation among particles, a uniform coating can be applied, that is suitable to large-scale production, and that can obtain high-resolution images by maintaining the toner electric charge and electric charge distribution; and the developer included in said titania nanoparticles.

Abstract: A method of recognizing speech is provided. The method includes the operations of (a) dividing first speech that is input to a speech recognizing apparatus into frames; (b) converting the frames of the first speech into frames of second speech by applying conversion rules to the divided frames, respectively; and (c) recognizing, by the speech recognizing apparatus, the frames of the second speech, wherein (b) comprises converting the frames of the first speech into the frames of the second speech by reflecting at least one frame from among the frames that are previously positioned with respect to a frame of the first speech.

Abstract: The present invention relates to a method of manufacturing titania nanoparticles, and specifically to a method of manufacturing titania nanoparticles wherein the particle size is uniform, it is possible to manufacture monodisperse particles without aggregation among particles, a uniform coating can be applied, that is suitable to large-scale production, and that can obtain high-resolution images by maintaining the toner electric charge and electric charge distribution; and the developer included in said titania nanoparticles.