Abstract: Provided are an apparatus and a method for river water purification using a treatment soil layer and a permeable filtering medium layer. The river water purification apparatus includes a treatment soil layer and a permeable filtering medium layer which are sequentially and alternately stacked. The treatment soil layer includes a plurality of unit soil layers which are arranged at intervals. A reservoir part which stores a predetermined amount of river water and supplies the river water to an inside of the unit soil layer is provided in an upper end part of the unit soil layer. The permeable filtering medium layer has a higher hydraulic conductivity than that of the treatment soil layer. The river water purification apparatus increases a treatment flux of river water regardless of a coefficient of water permeability of soil and effectively removes nitrogen, phosphorus and nutrient salts by stably forming an anaerobic condition.

Abstract: Disclosed herein are a beamforming method, a method of determining a beamforming coefficient, and an ultrasonic imaging apparatus.

Abstract: A method, medium, and apparatus canceling noise from a mixed sound. The method includes receiving sound source signals including a target sound and noise, extracting at least one feature vector indicating an attribute difference between the sound source signals from the sound source signals, calculating a suppression coefficient considering ratios of noise to the sound source signals based on the at least one extracted feature vector, and canceling the sound source signals corresponding to noise by controlling an intensity of an output signal generated from the sound source signals according to the calculated suppression coefficient. Accordingly, a clear target sound source signal can be obtained.

Abstract: A beamformer for forming a reception beam using a multichannel signal reflected from a subject is provided. The beamformer includes a signal generator that may generate a plurality of signals to which different apodization functions are applied, with respect to the multichannel signal, an estimator that may estimate a signal predominant component and a noise predominant component from the plurality of signals, a weight calculator that may calculate a weight to be applied to the signal predominant component according to each of channels, using the estimated signal predominant component and the estimated noise predominant component, and a weight applier that may apply the calculated weight to the estimated signal predominant component.

Abstract: An inspection apparatus includes a work stage part, an optical module, and an optical module moving part. The work stage part receives a board. The work stage part includes work stages disposed in parallel. The optical module includes a projecting part disposed over the board, an image capturing part disposed at a side portion of the projecting part to receive the grating pattern light and capture a reflection image, and an optical path changing part changing a path of the grating pattern light and guiding the grating pattern light to the image capturing part so that the grating pattern light is downwardly incident into the image capturing part. The optical module moving part is disposed over and coupled to the optical module to move the optical module. Thus, time may be reduced and a space may be secured, required for inspecting a board.

Abstract: A pair of polarizers having different polarization efficiencies is employed for a display device. With such a pair of polarizers, the brightness may increase without deteriorating the contrast.

Abstract: A diagnosis image generation apparatus is provided. The diagnosis image generation apparatus includes a low resolution image signal synthesis unit configured to synthesize each of a plurality of low resolution image signals by using a signal reflected from a subject, a weight calculation unit configured to calculate a weight, which is used to synthesize a high resolution image signal, with a signal value which corresponds to each of positions of some pixels among a plurality of signal values corresponding to respective positions of a plurality of pixels forming each of the synthesized low resolution image signals, and a high resolution image signal synthesis unit configured to synthesize the high resolution image signal by applying the calculated weight to each of the low resolution image signals.

Abstract: Provided is a sound source signal filtering method and apparatus. The sound source signal filtering method includes: generating two or more microphone output signals by combining sound source signals input through a plurality of microphones; calculating distances between the microphones and a sound source from which the sound source signals are emitted by using distance relationships according to frequencies of the sound source signals extracted from the generated microphone output signals; and filtering the sound source signals to obtain one or more sound source signals corresponding to a predetermined distance by using the calculated distances. Accordingly, it is possible to obtain only sound source signals emitted from a sound source at a particular distance from the microphone array among a plurality of sound source signals input through the microphone array.

Abstract: An image processing module includes a beamforming unit configured to provide a beamformed signal based on an input signal; a point spread function (PSF) database comprising at least one two-dimensional point spread function obtained based on at least one situational variable of the beamformed signal; and an image generation unit configured to select at least one two-dimensional point spread function from the point spread function database and perform deconvolution using the beamformed signal and the selected at least one two-dimensional point spread function to generate an image of a target portion of an object.