Patent application number | Description | Published |
20100327869 | ULTRA-SENSITIVE SUSCEPTIBILITY DETECTION APPARATUS OF ANHARMONIC RESONANCE MEASUREMENT TYPE USING ATOMIC MAGNETOMETER, AND METHOD OF USING SAME - The ultra-sensitive susceptibility detection apparatus of anharmonic resonance measurement type using an atomic magnetometer detects a change in susceptibility by a specimen containing an object to be measured. The apparatus includes an atomic magnetometer. The atomic magnetometer includes a cell containing an alkaline metallic atom, a light source for magnetically polarizing the alkaline metallic atom of the cell, and a bias magnetic field applicator for applying a bias magnetic field to adjust a measuring resonance frequency of the alkaline metallic atom. The apparatus includes an excitation magnetic field applicator for applying an excitation magnetic fields of different frequencies to magnetically excite the specimen, but not to couple the excitation field directly to the measuring atomic resonance frequency, and a measuring device for measuring a change in magnetic polarization of the alkaline metallic atom, which is affected by a magnetic field caused by the specimen being magnetically excited by the excitation magnetic field. | 12-30-2010 |
20110068789 | NUCLEAR MAGNETIC RESONANCE APPARATUS - A nuclear magnetic resonance apparatus includes a dewar containing a low-temperature liquid refrigerant, a prepolarization coil disposed inside the dewar and including a superconducting wire, a prepolarization coil driving unit for intermittent application of current to the prepolarization coil in a capacitor charge/discharge method to generate a prepolarization magnetic field, a sensor unit for measuring a nuclear magnetic resonance signal from a sample to which a prepolarization magnetic field is applied with the prepolarization coil, and a readout magnetic field generation unit for applying a readout magnetic field to the sample. | 03-24-2011 |
20110154168 | EFFECTIVE HIGH-SPEED LDPC ENCODING METHOD AND APPARATUS USING THE SAME - Disclosed is an effective high-speed encoding method using a parity-check matrix proposed in an IEEE 802.1x standard for high-speed low-density parity-check encoding. In the prior art, encoding was performed by blocking and dividing the parity-check matrix of the LDPC code and through relevant matrix equations, or encoding was performed by an encoding apparatus that divides a matrix multiplication operation of a generated matrix acquired by using an arbitrary parity-check matrix of a quasi-cyclic (QC) LDPC code and information vectors into two sequential steps and implements each step as a cyclic shift-register. Unlike the prior art, the present invention provides an effective high-speed encoding method having low additional complexity by using a quasi-cyclic characteristic of a parity-check matrix as well as an encoding method through generation of a temporary parity bit, generation of a correction bit, and correction of a parity bit by using the parity-check matrix having a dual-diagonal parity structure proposed in the standard. | 06-23-2011 |
20110293291 | System and Method for Acquiring Data of Multi-Channel Signal - A system for acquiring data of a multi-channel signal includes a channel-voltage transmission module disposed in a shield room blocking electromagnetic waves, connected with a plurality of channels from which analog signals are output, and configured to generate a serial digital signal having information about an analog signal and information about a channel from which the analog signal is output, and an optical fiber cable through which the serial digital signal is transmitted from the channel-voltage transmission module to the outside of the shield room. | 12-01-2011 |
20120016612 | System and Method for Acquiring Data of Multi-Channel Squid Signal - A system for acquiring data of a multi-channel superconducting quantum interference device (SQUID) signal includes a digital converter connected to a SQUID sensor having a plurality of channels and configured to receive a voltage signal output from the plurality of channels and generate a channel-voltage serial digital signal having information about a channel from which the voltage signal is output and information about the voltage signal, and an optical fiber cable through which the channel-voltage serial digital signal is transmitted from the digital converter. | 01-19-2012 |
20120238860 | System and Method for Measuring Magnetocardiogram of Small Animal - A system and method for measuring a magnetocardiogram (MCG) in order to measure a weak magnetic field generated from the heart of a small animal such as a laboratory rat are provided. The system includes a case, a SQUID sensor located and fixed inside the case to detect magnetism, a platform arranged near the SQUID sensor inside the case, the small animal being placed on the platform, a linear station to which the platform is fixed to move a location of the platform, and a control unit configured to control operations of the SQUID sensor and the linear station and measure the MCG of the small animal using intensities of the magnetism detected by the SQUID sensor. | 09-20-2012 |
20120252678 | LOW-NOISE COOLING APPARATUS - A low-noise cooling apparatus is provided. The cooling apparatus includes an outer container and an inner container. A thermal insulation layer in a vacuum state is disposed between the outer container and the inner container. The inner container includes a Dewar containing a liquid refrigerant, a prepolarization coil arranged inside the inner container and immersed in the liquid refrigerant, a pick-up coil immersed in the liquid refrigerant, and a superconducting quantum interference device (SQUID) electrically connected to the pick-up coil and immersed in the liquid refrigerant. The prepolarization coil is made of a superconductor. | 10-04-2012 |
20130093608 | SIGNAL PROCESSING APPARATUS AND SIGNAL PROCESSING METHOD THEREOF - Provided are a signal processing apparatus and a signal processing method. The signal processing method include receiving a serial signal including an information frame including channel information and data information of a corresponding channel, extracting a clock signal from the serial signal, generating a load signal when a clock count reaches a maximum clock count by calculating the clock signal; converting the serial signal to a parallel signal according to the load signal, and changing the maximum clock count by comparing parallel-converted parallel channel information with a load count indicating the number of local signals. | 04-18-2013 |
20130241551 | ULTRA-LOW-FIELD NUCLEAR-MAGNETIC-RESONANCE DIRECT MYOCARDIAL ELECTRICAL ACTIVITY DETECTION METHOD AND ULTRA-LOW-FIELD NUCLEAR-MAGNETIC-RESONANCE DEVICE - Provided are ultra-low-field nuclear-magnetic-resonance myocardial electrical activity detection method and an ultra-low-field nuclear-magnetic-resonance device. The ultra-low-field nuclear-magnetic-resonance device includes magnetic shielding means; high-sensitivity magnetic field measuring means disposed adjacent to a measurement target disposed inside the magnetic shielding means; and bias magnetic field generating means for providing an external measurement bias magnetic field, corresponding to a proton magnetic resonance frequency (nuclear magnetic resonance frequency) corresponding to a frequency of periodic myocardial activity of a lesion desired to be measured, to the measurement target. The high-sensitivity magnetic field measuring means measures a magnetic resonance signal generated from the measurement target. | 09-19-2013 |
20130271145 | APPARATUS AND METHOD FOR CANCELING MAGNETIC FIELDS - Provided are an apparatus and a method for canceling magnetic fields. The apparatus includes a magnetic field canceling coil disposed adjacent to an inner wall of a magnetic shield room to surround the entire inner space or a portion of an inner space of the magnetic shield room; and a magnetic field canceling coil driver to supply current to the magnetic field canceling coil. The magnetic field canceling coil cancels a prepolarization magnetic field established on the wall of the magnetic shield room by a prepolarization coil disposed in the center of the magnetic shield room to minimize magnetic interference caused by the magnetic shield room. | 10-17-2013 |
20130278265 | LOW-FIELD NUCLEAR MAGNETIC RESONANCE DEVICE AND LOW-FIELD NUCLEAR MAGNETIC RESONANCE METHOD - Provided are a low-field nuclear magnetic resonance device and a low-field nuclear magnetic resonance method. The low-field nuclear magnetic resonance device includes a dynamic nuclear polarization (DNP) amplification unit to amplify the nuclear polarization of hydrogen atoms of water using a DNP-possible substance (DNP substance) to provide the amplified nuclear polarization to a measurement target, a sensor unit to measure a magnetic resonance signal of the measurement target using a SQUID sensor or an optically-pumped atomic magnetometer, and a measurement field coil to apply a measurement field to the measurement target. The DNP amplification unit is separated from the measurement target, the sensor unit, and the measurement field coil. | 10-24-2013 |
20140232400 | OBJECT DISCRIMINATION METHOD USING ULTRA-LOW MAGNETIC FIELD NUCLEAR MAGNETIC RESONANCE AND AN OBJECT DISCRIMINATION APPARATUS OF THE SAME - Provided are an object discrimination method and an object discrimination apparatus using an ultra-low magnetic field nuclear magnetic resonance (NMR). The method includes measuring the respective spin-lattice relaxation times at a plurality of strengths of prepolarization magnetic fields with respect to a measurement target and classifying the measurement target using the spin-lattice relaxation times. | 08-21-2014 |
20140235996 | METHOD FOR NON-INVASIVE MAPPING OF MYOCARDIAL ELECTRIC ACTIVITY - A method for mapping of myocardial electric activity includes measuring electrocardiogram data or magnetocardiogram data and mapping the degree of electric activity of a myocardial surface using the electrocardiogram data or the magnetocardiogram data. A signal source of the electrocardiogram data or the magnetocardiogram data is a myocardial surface potential that is scalar quantity. The mapping uses a lead-field vector which represents the sensitivity between the myocardial surface potential and the electrocardiogram or magnetocardiogram data, and a modified lead-field vector which combines a constraint matrix with a constraint condition where no potential sources exist in a specific region. | 08-21-2014 |
20140343397 | BIOMAGNETIC RESONANCE DEVICE AND MEASURING METHOD THEREFOR - Provided are an ultra-low-field nuclear magnetic resonance device and an ultra-low-field nuclear magnetic resonance measuring method. The method includes applying a first measurement bias magnetic field corresponding to an excitation frequency of a coherent biomagnetic field generated in association with the electrophysiological activity of human body organs, applying a second measurement bias magnetic field having the same direction as the first measurement bias magnetic field and having a different magnitude than the first measurement bias magnetic field, and measuring a magnetic resonance signal generated in the human body by using magnetic field measuring means. | 11-20-2014 |
20140348183 | DATA SYNCHRONIZATION APPARATUS - Provided is a data synchronization apparatus. The data synchronization apparatus includes a signal conversion block converting individual serial digital signals into parallel digital signals in response to a load signal and converting the parallel digital signals into synchronized serial digital signals in response to a synchronization load signal which does not overlap the load signal, a clock/load signal generator outputting a reference load signal for generating the synchronization load signal to the signal conversion block, a multiplexer multiplexing the synchronized serial digital signals, and a first serial-to-parallel (S/P) converting the multiplexed signal into parallel signals. | 11-27-2014 |
20150018502 | METHOD FOR ETHYLENE OLIGOMERIZATION - The present invention relates to a method for ethylene oligomerization. According to the method of the present invention, highly active ethylene oligomerization reaction is possible by using a catalyst system including a novel chromium compound exhibiting high activity for ethylene oligomerization reaction, and therefore, polyethylene can be prepared using a small amount of comonomers or using only ethylene without comonomers. | 01-15-2015 |