Abstract: The embodiments described herein relate generally to medical devices that measure vital signs, and more particularly to wearable wireless devices that collect multiple simultaneous vital signs, and systems and methods for compressing the sensor data into a matrix representation to facilitate collecting, transmitting, processing, and displaying vital sign data.

Abstract: The embodiments described herein relate generally to medical devices that measure vital signs, and more particularly to wearable wireless devices that collect multiple simultaneous vital signs, and systems and methods for compressing the sensor data into a matrix representation to facilitate collecting, transmitting, processing, and displaying vital sign data.

Abstract: Disclosed are a method for transmitting and receiving a frame in a wireless local area network (WLAN) system and an apparatus for the same. A method for generating interference/non-interference station lists includes receiving a first frame from a second station, acquiring a receiver address of the first frame from the first frame, and setting, based on whether to receive a second frame that is a response to the first frame from a third station indicated by the receiver address within a preset time from a time when the first frame has been received, the third station as an interference station or a non-interference station. Therefore, the performance of a communication system may be improved.

Abstract: Disclosed is a technology for providing a content on the basis of DASH adaptive to a variable bandwidth. The present invention may comprise: a bandwidth measurement unit for measuring a bandwidth of a network connected to a terminal at predetermined time intervals; a segment generation unit for generating a plurality of segments, wherein the plurality of segments have a predetermined bitrate difference therebetween; and a media information generation unit for generating a media presentation description which includes information on the representation including the plurality of generated segments, wherein the segment generation unit calculates segment lengths using arithmetic operations on the predetermined time interval and the probability that an ith bandwidth itself among bandwidths of the network measured at the predetermined time intervals is increased or decreased by half of the predetermined bitrate difference, and generates a plurality of segments corresponding to the calculated lengths.

Abstract: Provided is an X-ray generator including a thermal electron emission type X-ray generator configured to generate a negative high voltage and a filament current, a field electron emission type X-ray generator including an anode electrode to be grounded, and configured to use the negative high voltage to bias the cathode electrode, and a field emission current control unit configured to convert the filament current to generate an output voltage to be provided to a gate electrode of the field electron emission type X-ray generator and convert the filament current to fix, to a specific level, a level of an emission current flowing through the cathode electrode.

Abstract: Provided is a therapy method using an ion beam, including injecting the ion beam to a target spot in a body of an examinee, measuring a Bragg peak spot of the ion beam injected into the body of the examinee, and adjusting the target spot using the measured Bragg peak spot, wherein the measuring of the Bragg peak spot comprises measuring a spot of a microbubble generated inside the body of the examinee.

Abstract: Provided are a frame transmission method performed in an access point (AP), a frame reception method performed in a terminal, and an AP. The frame transmission method performed in an AP includes acquiring a channel for transmitting a first data unit of a first terminal, when a data unit to be transmitted to at least one terminal other than the first terminal is in the AP, generating a physical layer convergence procedure (PLCP) protocol data unit (PPDU) including the first data unit and the data unit to be transmitted to the at least one terminal, and transmitting the PPDU to the first terminal and the at least one terminal. Accordingly, it is possible to improve the performance of a wireless local area network (WLAN).

Abstract: The present disclosure relates to a microphone driving device and a digital microphone including the same. A microphone driving device according to an embodiment of the inventive concept includes a voltage-to-current converter, a current-to-voltage converter, an analog-to-digital converter, a digital amplification unit, and a gain controller. The voltage-to-current converter converts an acoustic signal to an output current signal based on a gain control signal. The current-to-voltage converter converts the output current signal to an amplified voltage signal. The analog-to-digital converter converts the amplified voltage signal to a digital signal. The digital amplification unit amplifies the digital signal to an amplified digital signal based on the gain control signal. The gain controller generates a gain control signal. The microphone driving device and the digital microphone including the same according to the inventive concept may have a wide dynamic range and reduce the influence of noise.

Abstract: Provided is an electron emission source including a substrate, a fixed structure provided on the substrate, and an electron emission yarn provided between the substrate and the fixed structure. The fixed structure includes a first portion having a first width and a second portion having a second width greater than the first width, and the electron emission yarn extends on a first sidewall of the first portion of the fixed structure from between the fixed structure and the substrate.

Abstract: Provided is an operating method of a medical imaging device. The method includes receiving a 3D medical image, generating a 2D medical image from the 3D medical image based in a plate interpolation, and displaying the 2D medical image by using plate interpolation based weight information and interest region information.

Abstract: Provided is a semiconductor device including a target circuit, a monitoring circuit, and a voltage controller. The target circuit includes a transistor. The monitoring circuit is configured to measure a temperature of the target circuit or measure a delay time between an input and an output of the target circuit. The voltage controller is configured to adjust a driving voltage for driving the target circuit or a back-bias voltage for adjusting a threshold voltage of the transistor by referring to at least one of the temperature and the delay time. As the temperature increases, the delay time decreases.

Abstract: Disclosed is a varifocal lens module. A varifocal lens module according to an embodiment includes a lens formed of a flexible and transparent material and having a focal length varying according to a variable shape thereof; at least one driving part expanded or contracted in response to an electric signal; and at least one structural body configured to physically or chemically connect the lens and each driving part.

Abstract: A face recognition based key generation apparatus controls a key generation model that is formed of a CNN and an RNN to be learned to generate a desired key having a consistent value by using sample facial images of a key owner and a PIN of the key owner as inputs, and the key generation model receives a facial image of the key owner and the PIN of the key owner, as inputs at a desired key generation time, and generates a key.

Abstract: There is provided a method of aligning interference in a wireless local area network. A method of receiving a frame includes receiving a first frame from a first access point associated with a terminal, comparing a signal level of the first frame with a preset data rate, performing a pre-procedure for interference alignment when the signal level of the first frame is less than the preset data rate, receiving a second frame from the first access point, and aligning interference of the second frame based on information obtained through the pre-procedure. According to the present invention, it is possible to control interference in an overlapping band.

Abstract: Provided is an image compression device including an object extracting unit configured to perform convolution neural network (CNN) training and identify an object from an image received externally, a parameter adjusting unit configured to adjust a quantization parameter of a region in which the identified object is included in the image on the basis of the identified object, and an image compression unit configured to compress the image on the basis of the adjusted quantization parameter.

Abstract: A method and an apparatus for setting a quiet window in a passive optical network system are provided. A first response time from a time after an optical line terminal (OLT) transmits a serial number request up to a time in which the OLT receives a first response signal to the serial number request is measured, and a second response time up to a time in which the OLT receives a final response signal to the serial number request is measured. In addition, distance information of an optical network unit (ONU) including the first response time and the second response time is acquired.

Abstract: Provided is a thermo-optic optical switch including an input waveguide configured to receive an optical signal, an output waveguide configured to output the optical signal, branch waveguides branching from the input waveguide to be connected to the output waveguide, and heater electrodes disposed on the branch waveguides and configured to heat the branch waveguides, wherein the branch waveguides includes first and second phase shifters having first and second thermo-optic coefficients of opposite signs.

Abstract: The present disclosure relates to a frame grabber, an image processing system, and an image processing method. A frame grabber according to an embodiment of the inventive concept includes a plurality of decoders, a plurality of image controllers, a plurality of memories, a synchronization controller, and a synchronization memory. The plurality of decoders generate a plurality of image data by decoding a plurality of image signals. The plurality of image controllers generate a plurality of pixel data and a plurality of frame information data on the basis of the plurality of image data. The plurality of memories store the plurality of pixel data. The synchronization controller receives the plurality of frame information data, and generates synchronization data on the basis of the plurality of frame information data. The synchronization memory stores the frame information data and the synchronization data.

Abstract: A wavelength division multiplexer is disclosed. The wavelength division multiplexer may include an input waveguide, in which a plurality of Bragg gratings for separating multiplexed optical signals into respective optical signals are provided, and a plurality of output waveguides connected to the input waveguide and configured to receive the optical signals separated by the plurality of Bragg gratings. The plurality of Bragg gratings may include a first Bragg grating including first protrusions each having a first width, and a second Bragg grating including second protrusions each having a second width larger than the first width. Each of the first and second protrusions may include a curved side surface, to which a corresponding one of the optical signals is incident.

Abstract: The present disclosure relates to a terahertz wave generation apparatus capable of wavefront control. A terahertz wave generating apparatus according to an exemplary embodiment comprises a photoconductive substrate; and a plurality of terahertz wave generating unit elements arranged in a two-dimensional array on the photoconductive substrate. Also, the terahertz wave generating unit elements comprise a plurality of first electrodes arranged in the two-dimensional array on the photoconductive substrate and respectively connected to a plurality of first electrode pads, and at least one second electrode formed on the photoconductive substrate so as to face the first electrodes.