Patents Assigned to Gwangju Institute of Science and Technology
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Patent number: 11976314Abstract: The present invention relates to a transformed strain having ethanol production potential, constructed by introducing a foreign gene for ethanol production into a non-ethanol producing acetogen Eubacterium limosum and a method for producing ethanol, using the strain. According to the present invention, Eubacterium limosum which is a conventional acetogen lacking ethanol production potential is used to produce ethanol, which is a high value-added product, as a single product from carbon monoxide contained in waste gas.Type: GrantFiled: August 28, 2018Date of Patent: May 7, 2024Assignees: GWANGJU INSTITUTE OF SCIENCE AND TECHNOLOGY, KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATIONInventors: In Seop Chang, Jiyeong Jeong, Shinyoung Park, In-Geol Choi, Byeonghyeok Park
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Patent number: 11965254Abstract: The present invention relates to a manufacturing apparatus and method for customizing a H2/CO synthetic gas in a desired ratio by producing a synthetic gas in which H2 and CO are mixed through hydrolysis of both carbon dioxide and a nitrogen compound with low power. In a low-power electrochemical apparatus for producing a synthetic gas according to the present invention, by performing the reduction of the carbon dioxide at the cathode and the oxidation of the nitrogen compound at the anode at the same time, carbon dioxide conversion efficiency may be improved 30% or more compared to the conventional carbon dioxide conversion system, and a synthetic gas with a desired H2/CO ratio may be produced by controlling the H2/CO ratio of the produced synthetic gas, and by reducing a driving voltage, the corrosion problem of electrode materials may be inhibited and the durability of electrodes may be increased.Type: GrantFiled: July 22, 2022Date of Patent: April 23, 2024Assignee: GWANGJU INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Jaeyoung Lee, Minjun Choi, Jin Won Kim, Sungyool Bong, Youjin Lee, Sunki Chung
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Patent number: 11964991Abstract: In a ruthenium complex compound according to the present invention, an NHC ligand has an excellent electron-donating ability to stabilize methylidene species due to the steric interaction between substituents having relatively different sizes. The ruthenium complex compound can improve selectivity when used as a catalyst due to having an asymmetric structure, and the activity of the ruthenium complex compound can be improved by adjusting substituents and additives. Accordingly, the ruthenium complex compound can be used as a catalyst in cross metathesis reactions including ethenolysis to produce desired compounds such as linear ?-olefins at high yield, even under relatively mild conditions.Type: GrantFiled: January 17, 2020Date of Patent: April 23, 2024Assignee: GWANGJU INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Sukwon Hong, Seunghwan Byun
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Patent number: 11958571Abstract: According to an embodiment, a maritime wireless communication system comprises a communication module installed in the at least one buoy, providing sensing information, identification information, and location information for the at least one buoy and a gateway device installed in each of a fishing vessel terminal device and a managing vessel terminal device, performing communication with the at least one buoy and a land control center via a long range (LoRa)-based communication network to provide various types of fishery information, and setting different communication options for a normal condition and the event condition in performing a communication connection function.Type: GrantFiled: June 15, 2021Date of Patent: April 16, 2024Assignee: GWANGJU INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Ki Seon Kim, Myoung Shin Kwak, Pranesh Psthapit, Min Seok Kim
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Publication number: 20240108977Abstract: The present disclosure relates to a force and complex vibration rendering system using a force feedback device and a wideband resonance actuator, and a method for providing force and complex vibration using the system.Type: ApplicationFiled: September 29, 2023Publication date: April 4, 2024Applicants: GIST(Gwangju Institute of Science and Technology), Gleam Systems Co., Ltd.Inventors: Gun Hyuk PARK, Gyeong Deok KIM, Dong Hyeon KIM, Bong Soo KIM, Sung Ho KIM
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Patent number: 11945002Abstract: The present disclosure relates to an automatic metal sorting system using laser induced breakdown spectroscopy. The system may include: a conveyer configured to move waste metals at a constant speed; a shape measurer configured to measure a position and a shape of at least one waste metal on the conveyer; a laser induced breakdown spectroscopic device configured to determine the kind of the waste metal by emitting a laser to the waste metal and receiving and analyzing a plasma spectrum signal generated by the emitted laser; and a discharger configured to separate and discharge the waste metal in accordance with the determined kind of the waste metal.Type: GrantFiled: April 1, 2022Date of Patent: April 2, 2024Assignee: GIST(Gwangju Institute of Science and Technology)Inventors: Sung Ho Jeong, Sung Ho Shin, Young Min Moon, Jae Pil Lee
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Publication number: 20240077594Abstract: Provided is an optical phase array antenna including a coupling unit for receiving light from a light source, a light distribution unit for distributing light propagated from the coupling unit to a plurality of optical paths, a phase modulation unit for modulating a phase of the light distributed from the light distribution unit, and a light output unit that outputs the light modulated by the phase modulation unit, and includes an antenna element waveguide extending at a predetermined length through which the light propagates, and a clad layer formed to surround the antenna element waveguide, in which the antenna element waveguide has a first recessed portion recessed downward with respect to an upper surface thereof, and the clad layer has a second recessed portion recessed downward with respect to an upper surface thereof at a position adjacent to the first recessed portion.Type: ApplicationFiled: December 28, 2022Publication date: March 7, 2024Applicant: GIST (Gwangju Institute of Science and Technology)Inventors: Nan Ei YU, Byeong Chan PARK
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Publication number: 20240070362Abstract: A simulation method includes establishing a carrier distribution function of a semiconductor device model, computing one or more values corresponding to a solution of an approximate Boltzmann transport equation with respect to the carrier distribution function, and outputting a performance value of the semiconductor device model, which corresponds to the one or more values corresponding to the solution of the approximate Boltzmann transport equation, as a simulation result value.Type: ApplicationFiled: May 18, 2023Publication date: February 29, 2024Applicants: Samsung Electronics Co., Ltd., GWANGJU INSTITUTE OF SCIENCE AND TECHNOLOGYInventor: Sung-Min HONG
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Patent number: 11916565Abstract: An analog-to-digital converter is provided. The analog-to-digital converter includes: a sample/hold circuit; a digital-to-analog converter; a plurality of comparison circuits; a control logic; and a digital register, wherein the plurality of comparison circuits include: a first comparison circuit configured to output a first comparison result signal in a first operation period; a second comparison circuit configured to, in a second operation period, calibrate an offset of a second comparison result signal based on a reference signal corresponding to the first comparison result signal among a plurality of reference signals and output the calibrated second comparison result signal; and a third comparison circuit configured to, in a third operation period, calibrate an offset of a third comparison result signal based on a reference signal corresponding to the calibrated second comparison result signal and output the calibrated third comparison result signal.Type: GrantFiled: February 16, 2022Date of Patent: February 27, 2024Assignees: SAMSUNG ELECTRONICS CO., LTD., GWANGJU INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Jaerin Lee, Minjae Lee, Sewon Lee, Kyeongkeun Kang
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Patent number: 11906514Abstract: The invention encompasses methods and test strips for detecting the presence of cerebrospinal fluid (CSF) in a biological sample with a lateral flow device which uses lectin conjugates, anti-antigen conjugates, an immobilized serum line, and an immobilized anti-antigen line.Type: GrantFiled: June 8, 2022Date of Patent: February 20, 2024Assignees: NSPC Technologies, LLC, Gwangju Institute of Science and TechnologyInventor: Min-Gon Kim
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Patent number: 11878003Abstract: This application relates to a composition for preventing, treating, and improving skeletal muscle atrophy, the composition including an organoselenium compound. The composition recovered the thickness of muscle fiber reduced by dexamethasone treatment. In addition, the treatment of mice in a muscle loss model showed that the composition had an effect of reducing damaged muscle and of restoring muscle mass. Therefore, it is expected that the composition can be effectively used for the treatment, prevention, or improvement of muscle atrophy.Type: GrantFiled: September 24, 2021Date of Patent: January 23, 2024Assignee: GWANGJU INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Darren Reece Williams, Da-Woon Jung, Ji-Hyung Lee, Hyun-Jun Kim, Seon-Wook Kim
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Publication number: 20240013060Abstract: An early stopping method for a neural network according to an embodiment of the present disclosure includes: dividing a labeled dataset into a training dataset and a validation dataset; creating a pretrained neural network by training a neural network using the training dataset and early stopping learning of the neural network using the validation dataset; and creating a target neural network for each epoch by training the target neural network using the entire labeled dataset, and early stopping learning of the target neural network on the basis of a similarity between output of the pretrained neural network on at least one of the labeled data and unlabeled data and output of the target neural network on the unlabeled data.Type: ApplicationFiled: January 30, 2023Publication date: January 11, 2024Applicant: GIST (Gwangju Institute of Science and Technology)Inventors: Hyunju Lee, HongSeok Choi, Dongha Choi
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Publication number: 20230419547Abstract: The present disclosure relates to a virus detection method that detects whether viruses are arranged in multiple layers and the density of viruses using a color change of a virus detector. A virus detection method according to an embodiment of the present disclosure includes: taking an image of a virus detector reacting with a target analysis object; and determining whether viruses are arranged in multiple layers and density of the viruses in the target analysis object in accordance with a saturation value of the image.Type: ApplicationFiled: January 26, 2023Publication date: December 28, 2023Applicant: GIST (Gwangju Institute of Science and Technology)Inventors: Young Min SONG, Joo Hwan KO, Young Jin YOO
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Publication number: 20230380712Abstract: The present invention relates to apparatus for a nanoparticle thermal therapy based on an open magnetic particle image. The apparatus for a nanoparticle thermal therapy based on an open magnetic particle image according to an exemplary embodiment of the present invention may include: a selection coil generating a field free point (FFP) for a nanoparticle in a first direction; a focus coil generating a magnetic field and moving the FFP in a second direction; and a heating coil heating the nanoparticle in a target area based on the FFP in the second direction.Type: ApplicationFiled: August 8, 2023Publication date: November 30, 2023Applicant: GIST(Gwangju Institute of Science and Technology)Inventors: Jung Won YOON, Tuan Anh LE, Minh Phu BUI
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Publication number: 20230377177Abstract: The present disclosure relates to a method of aligning images included in a focal stack and estimates depth information of an object in the images by extracting features of the aligned images, using a neural network model. A focal stack alignment method according to an embodiment of the present disclosure includes: calculating a relative Field of View (FoV) of a focal stack photographed by a photographing device using metadata of the photographing device; primarily aligning the focal stack on the basis of the relative FoV; determining a flow field of the focal stack using radial motion, horizontal motion, and vertical motion features of each of primarily aligned images; and secondarily aligning the focal stack using the flow field.Type: ApplicationFiled: January 24, 2023Publication date: November 23, 2023Applicant: GIST (Gwangju Institute of Science and Technology)Inventors: Hae-Gon JEON, Chang Yeon WON
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Publication number: 20230365775Abstract: Disclosed are an electrically conductive hydrogel having a graphene network and a method for fabricating the same. The electrically conductive hydrogel is fabricated by thermal annealing of granular hydrogel, and thus it has a porous structure, excellent electrical conductivity, and improved compressive modulus and yield stress. Accordingly, the electrically conductive hydrogel may be advantageously used in biomedical applications, such as scaffolds for tissue engineering, bioelectrodes, and biosensors.Type: ApplicationFiled: April 17, 2023Publication date: November 16, 2023Applicant: Gwangju Institute of Science and TechnologyInventors: Jae Young LEE, Jung Geon PARK
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Publication number: 20230352041Abstract: The present invention relates to a speaker diarization technology, and more specifically to, end-to-end speaker diarization system and method through transformer learning having an auxiliary loss-based residual connection to separate speakers by dividing the speakers for time interval, wherein the end-to-end speaker diarization system and method using an auxiliary loss can differentiate and separate speakers through speaker labeling based on the transformer learning using an auxiliary loss even if speaker speeches overlap in a multi-speaker environment.Type: ApplicationFiled: November 29, 2022Publication date: November 2, 2023Applicant: Gwangju Institute of Science and TechnologyInventors: Dong Keon PARK, Hong Kook KIM, Ye Chan YU
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Patent number: 11804230Abstract: An audio encoding/decoding apparatus and method using vector quantized residual error features are disclosed. An audio signal encoding method includes outputting a bitstream of a main codec by encoding an original signal, decoding the bitstream of the main codec, determining a residual error feature vector from a feature vector of a decoded signal and a feature vector of the original signal, and outputting a bitstream of additional information by encoding the residual error feature vector.Type: GrantFiled: April 1, 2022Date of Patent: October 31, 2023Assignees: Electronics and Telecommunications Research Institute, Gwangju Institute of Science and TechnologyInventors: Inseon Jang, Seung Kwon Beack, Jongmo Sung, Tae Jin Lee, Woo-taek Lim, Jongwon Shin, Youngju Cheon, Sangwook Han, Soojoong Hwang
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Publication number: 20230342948Abstract: The present disclosure relates to a method for sampling a random vector corresponding to an intention of a pedestrian non-stochastically or applying a social statistical element that the majority of pedestrians move in groups to training, in training a neural network model for pedestrian trajectory prediction.Type: ApplicationFiled: February 27, 2023Publication date: October 26, 2023Applicant: GIST(Gwangju Institute of Science and Technology)Inventors: Hae Gon JEON, In Hwan BAE, Jin Hwi PARK
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Publication number: 20230330432Abstract: A device for relieving dementia symptoms is disclosed. The device for relieving dementia symptoms includes a light stimulation part disposed at a location within a preset radius from an eyeball and frontal lobe of a patient and configured to relieve dementia symptoms of the patient by radiating light having a preset wavelength band to an optic nerve and frontal lobe of the patient, and a controller configured to control an operation of the light stimulation part.Type: ApplicationFiled: May 18, 2023Publication date: October 19, 2023Applicants: N.CER Co., Ltd, GWANGJU INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Jae won KIM, Jae Gwan KIM, Jeong Dae YUN, Sung Chul KIM