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Advances in Atmospheric Sciences 2016年第2期33卷 221-232页

作者： Su jeong LEE Myoung-hwan AHN Yeonjin LEE Department of Atmospheric Science and Engineering Ewha Women’s University

Atmospheric instability information derived from satellites plays an important role in short-term weather forecasting, especially the forecasting of severe convective storms. For the next generation of weather satellites for Korea＇s multi-purpose geostationary satellite program, a new imaging instrument has been developed. Although this imaging instrument is not de- signed to perform full sounding missions and its capability is limited, its multi-spectral infrared channels provide information on vertical sounding. To take full advantage of the observation data from the much improved spatiotemporal resolution of the imager, the feasibility of an artificial neural network approach for the derivation of the atmospheric instability is investigated. The multi-layer perceptron model with a feed-forward and back-propagation training algorithm shows quite a sensitive re- sponse to the selection of the training dataset and model architecture. Through an extensive performance test with a carefully selected training dataset of 7197 independent profiles, the model architectures are selected to be 12, 5000, and 0.3 for the number of hidden nodes, number of epochs, and learning rate, respectively. The selected model gives a mean absolute error, RMSE, and correlation coefficient of 330 J kg-1, 420 J kg-1, and 0.9, respectively. The feasibility is further demonstrated via application of the model to real observation data from a similar instrument that has comparable observation channels with the planned imager.

关键词： CAPE artificial neural network instability geostationary imager

Disruption of sensation-dependent bladder emptying due to bladder overdistension in a complete spinal cord injury:A case report

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World Journal of Clinical Cases 2021年第29期9卷 8946-8952页

作者： Ju-Yul Yoon Da-Sol Kim Gi-Wook Kim Yu Hui Won Sung-Hee park Myoung-hwan Ko jeong-hwan Seo Department of Physical Medicine and Rehabilitation Jeonbuk National University Medical SchoolJeonju 54097JeonbukSouth Korea Department of Physical Medicine and Rehabilitation Jeonbuk National University Medical SchoolKorea Research Institute of Clinical Medicine of Jeonbuk National University−Biomedical Research Institute of Jeonbuk National University HospitalJeonju 54097JeonbukSouth Korea

BACKGROUNDAutonomic dysreflexia (AD) can be a life-threatening condition in patients withspinal cord injury. It is important to prevent bladder overdistension in thesepatients as it may trigger AD. Sensation-dependent bladder emptying (SDBE), asa method of bladder management, improves the quality of life and allowsphysiologic voiding. In this study, we report disruption of the SDBE habit afterbladder overdistension leading to AD with chest *** SUMMARYA 47-year-old male with a diagnosis of C4 American Spinal Cord InjuryAssociation impairment scale A had been emptying his bladder using the cleanintermittent catheterization method with an itchy sensation in the nose as asensory indication for a full bladder for 23 years, and the usual urine volume wasabout 300-400 mL. At the time of this study, the patient had delayed catheterizationfor approximately five hours. He developed severe abdominal pain andheadache and had to visit the emergency room for bladder overdistension (800mL) and a high systolic blood pressure (205 mmHg). After control of AD, ahypersensitive bladder was observed despite using anticholinergic agents. Thesensation indicating bladder fullness changed from nose itching to pain in theabdomen and precordial area. Moreover, the volume of the painful bladder fillingsensation became highly variable and was noted when the bladder urine volumeexceeded only 100 mL. The patient refused intermittent clean catheterization Finally, a cystostomy was performed, which relieved the *** using physiologic feedback, such as SDBE, for bladder management arerecommended to avoid bladder overdistension.

关键词： Neurogenic bladder Sensation-dependent bladder emptying Spinal cord injury Autonomic dysreflexia Bladder overdistension Bladder management Case report

The modulation of radiation-induced cell death by genistein in K562 cells:Activation of thymidine kinase 1

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Cell Research 2004年第4期14卷 295-302页

作者： Min Ho jeong,Young Hee JIN,Eun Young KANG,Wol Soon JO,hwan Tae park,Jae Dong LEE,Yeo Jin YOO,Soo Jin jeong Research Supporting Center for Medical Science (BK21 program) Dong-A University College of Medicine Busan Korea Research Supporting Center for Medical Science (BK21 program) Dong-A University College of Medicine Busan Korea Research Supporting Center for Medical Science (BK21 program) Dong-A University College of Medicine Busan Korea Research Supporting Center for Medical Science (BK21 program) Dong-A University College of Medicine Busan Korea Research Supporting Center for Medical Science (BK21 program) Dong-A University College of Medicine Busan Korea Department of Microbiology Pusan National University Busan Korea Research Supporting Center for Medical Science (BK21 program) Dong-A University College of Medicine Busan Korea Research Supporting Center for Medical Science (BK21 program) Dong-A University College of Medicine Busan Korea Virus Tumor Biology Section Laboratory of Cellular Oncology Center for Cancer Research National Cancer Institutes National Institute of Health Bethesda MD 20892 USA

Ionizing radiation is one of the most effective tools in cancer therapy. In a previous study, we reported that protein tyrosine kinase (PTK) inhibitors modulate the radiation responses in the human chronic myelogenous leukemia (CML) cell line K562. The receptor tyrosine kinase inhibitor, genistein, delayed radiation-induced cell death, while non-recepter tyrosine kinase inhibitor, herbimycin A (HMA) enhances radiation-induced apoptosis. In this study, we focused on the modulation of radiation-induced cell death by genistein and performed PCR-select suppression subtractive hybridization (SSH) to understand its molecular mechanism. We identified human thymidine kinase 1 (TK1), which is cell cycle regulatory gene and confirmed expression of TK1 mRNA by Northern blot analysis. Expression of TKl mRNA and TK1 enzymatic activity were parallel in their increase and decrease. TK1 is involved in G1-S phase transition of cell cycle progression. In cell cycle analysis, we showed that radiation induced G2 arrest in K

关键词： K562 radiation cell death genistein thymidine kinase 1 cell cycle.

Effect of pulse time on surface characteristics and corrosion resistance during pulse electrochemical polishing

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中国有色金属学会会刊：英文版 2012年第S3期22卷 876-880页

作者： Young-Bin KIM jeong-Woo park Department of Advanced Parts and Materials Engineering Chosun University Department of Mechanical Design Engineering Chosun University

Pulse electrochemical polishing (PECP) was used to improve the mechanical properties,such as surface roughness and corrosion resistance,of conductive metallic *** can provide a smooth,bright,reflective,and deburred surface that exhibits superior corrosion *** this work,stainless steel was used as the anode,and copper was used as the cathode due to their low electrical *** surface roughness of the PECP sample was measured by atomic force microscopy (AFM).A scanning electron microscope (SEM) was used to observe surface characteristics,and an Auger electron spectroscope (AES) was used to analyze the metallurgical composition and thickness of the passive *** aim of this research was to compare the corrosion resistance rates of the unprocessed and PECP-processed stainless steel.

关键词： stainless stell pulse electrochemical polishing corrosion resistance

Quantitative analysis of uranium in electrorecovery salt of pyroprocessing using laser-induced breakdown spectroscopy

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Plasma Science and Technology 2021年第5期23卷 96-103页

作者： Seul-Ki HAN Se-hwan park Seong-Kyu AHN Korea Atomic Energy Research Institute Yuseong-guDaejeon 34057Republic of Korea Korea Institute of Industrial Technology Yeonsu-guIncheon21999Republic of Korea

The amounts of nuclear materials in the Li Cl-KCl salt in pyroprocessing have to be analyzed to prevent the diversion of the nuclear *** alternative method to the chemical analysis has been pursued,and laser-induced breakdown spectroscopy(LIBS)is one *** the present work,an in situ and quantitative analysis method of electro-recovery(ER)salt was proposed and demonstrated by using LIBS combined with dipstick *** types of simulated salt samples were prepared:ER salt sample and salt obtained from the dipstick sampling,and pulsed neodymium-doped yttrium aluminum garnet(Nd:YAG)laser with a wavelength of 532 nm was focused on the salt to generate *** plasma emission was measured by using an Echelle spectrometer with a resolution of 0.01 nm in conjunction with an Intensified Charge-Coupled Detector *** U and other rare earth peaks in the spectra were *** best Limit of Detection and Root Mean Square Error of Calibration of U were 38 ppm and 0.0203 wt%,*** work shows that the U in the pyroprocessing ER salt can be monitored with LIBS.

关键词： LIBS uranium LOD RMSEC

Uranium measurements using laser-induced breakdown spectroscopy in lithium chloride-potassium chloride salt of pyroprocessing

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Plasma Science and Technology 2020年第7期22卷 110-115页

作者： Seul-Ki HAN Se-hwan park Seong-Kyu AHN Korea Atomic Energy Research Institute Yuseong-guDaejeon 34057Republic of Korea

In pyroprocessing,uranium(U) is recovered from molten LiCl-KCl salt,and,for safeguard purposes,it is important to analyze the U and Plutonium(Pu) concentrations in a timely *** the present work,salt samples containing U were *** laser used in the present work was an Nd:YAG laser with a wavelength of 532 nm,a laser energy on the sample of11.5 mJ,and a pulse repetition rate of 10 *** plasma emission light was measured with an Echelle spectrometer.A total of 100 points on the sample surface were measured as the laser incident position was *** U and potassium(K) peaks in the spectrum were *** and multivariate analyzes were conducted to determine the accuracy and limit of detection(LOD) of the laser-induced breakdown spectroscopy.

关键词： LIBS uranium(U) safeguards LOD

Effect of In Composition on Two-Dimensional Electron Gas in Wurtzite AlGaN/InGaN Heterostructures

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Chinese Physics Letters 2010年第11期27卷 188-190页

作者： KIM Bong-hwan park Seoung-hwan LEE Jung-Hee MOON Yong-Tae Department of Electronics Engineering Catholic University of Daegu Hayang Kyeongsan Kyeongbuk 712-702 R. Korea School of Electrical Engineering and Computer Science Kyungpook National University Daegu 702-701 R. Korea LG Corporate Institute of Technology 16 Woomyeon-dong Seocho-gu Seoul 137-14-0 R. Korea

The effect of In composition on two-dimensional electron gas in wurtzite AlGaN/InGaN heterostructures is theoretically investigated. The sheet carrier density is shown to increase nearly linearly with In mole fraction x, due to the increase in the polarization charge at the AlGaN/InGaN interface. The electron sheet density is enhanced with the doping in the AlGaN layer. The sheet carrier density is as high as 3.7×1013 cm^-2 at the donor density of 10×1018 cm^-3 for the HEMT structure with x=0.3. The contribution of additional donor density on the electron sheet density is nearly independent of the In mole fraction.

关键词： Condensed matter: electrical magnetic and optical Electronics and devices Semiconductors Surfaces interfaces and thin films Condensed matter: structural mechanical & thermal Nanoscale science and low-D systems

Light-Material Interactions Using Laser and Flash Sources for Energy Conversion and Storage Applications

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Nano-Micro Letters 2024年第12期16卷 468-514页

作者： Jung hwan park Srinivas Pattipaka Geon-Tae hwang Minok park Yu Mi Woo Young Bin Kim Han Eol Lee Chang Kyu jeong Tiandong Zhang Yuho Min Kwi-Il park Keon Jae Lee Jungho Ryu Department of Mechanical Engineering(Department of Aeronautics Mechanical and Electronic Convergence Engineering)Kumoh National Institute of Technology61Daehak-RoGumiGyeongbuk 39177Republic of Korea Department of Materials Science and Engineering Pukyong National University45Yongso-RoNam-GuBusan 48513Republic of Korea Energy Technologies Area Lawrence Berkeley National LaboratoryBerkeleyCA 94720USA Department of Materials Science and Engineering Korea Advanced Institute of Science and Technology(KAIST)291 Daehak-RoYuseong-GuDaejeon 34141Republic of Korea Division of Advanced Materials Engineering Jeonbuk National UniversityJeonju 54896JeonbukRepublic of Korea School of Electrical and Electronic Engineering Harbin University of Science and TechnologyHarbin 150080People’s Republic of China Key Laboratory of Engineering Dielectrics and Its Application Ministry of EducationHarbin University of Science and TechnologyHarbin 150080People’s Republic of China Department of Materials Science and Metallurgical Engineering Kyungpook National University80 Daehak-RoBuk-GuDaegu 41566Republic of Korea School of Materials Science and Engineering Yeungnam UniversityDaehak-RoGyeongsan-Si 38541Gyeongsangbuk-doRepublic of Korea

This review provides a comprehensive overview of the progress in light-material interactions(LMIs),focusing on lasers and flash lights for energy conversion and storage *** discuss intricate LMI parameters such as light sources,interaction time,and fluence to elucidate their importance in material *** addition,this study covers various light-induced photothermal and photochemical processes ranging from melting,crystallization,and ablation to doping and synthesis,which are essential for developing energy materials and ***,we present extensive energy conversion and storage applications demonstrated by LMI technologies,including energy harvesters,sensors,capacitors,and *** the several challenges associated with LMIs,such as complex mechanisms,and high-degrees of freedom,we believe that substantial contributions and potential for the commercialization of future energy systems can be achieved by advancing optical technologies through comprehensive academic research and multidisciplinary collaborations.

关键词： Light Light-material interaction Nanomaterials Energy conversion and storage devices

Lactobacillus salivarius HHuMin-U Activates Innate Immune Defense against Norovirus Infection through TBK1-IRF3 and NF-κB Signaling Pathways

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Research 2023年第3期2022卷 229-241页

作者： Da Hyun Kim Minju jeong Jae hwan Kim Joe Eun Son John JYLee Sang-jun park Juyeon Lee Minwoo Kim Jong-Won Oh Myeong Soo park Sanguine Byun Department of Biotechnology Yonsei UniversitySeoul 03722Republic of Korea Department of Agricultural Biotechnology Seoul National UniversitySeoul 08826Republic of Korea Program in Developmental and Stem Cell Biology The Hospital for Sick ChildrenTorontoOntarioCanada Research Center BIFIDO Co.Ltd.Hanam 12930Republic of Korea

The composition of commensal bacteria plays a critical role in controlling immune responses in the *** have shown that specific bacterial strains may have the capacity to enhance host immune defense against gastrointestinal viral *** norovirus is known to be the most common cause of gastroenteritis,leading to an estimated 200,000 deaths every year,identification of bacterial strains with protective effects against norovirus infection remains ***,we discovered Lactobacillus salivarius HHuMin-U(HHuMin-U)as a potent antiviral strain against norovirus ***-U significantly suppressed murine norovirus replication and lowered viral RNA titers in *** transcriptome sequencing(RNA sequencing)analysis revealed that HHuMin-U markedly enhanced the expression level of antiviral interferon-stimulated genes compared to mock ***-U treatment dose-dependently induced type I interferons(IFN-αand IFN-β)and tumor necrosis factor-αproduction in mouse and human macrophages,promoting antiviral innate responses against norovirus *** on the molecular mechanism demonstrated that HHuMin-U can activate nuclear factorκB and TANK-binding kinase 1(TBK1)–interferon regulatory factor 3 signaling pathways,leading to the phosphorylation of signal transducer and activator of transcription 1 and signal transducer and activator of transcription 2,the key mediators of interferon-stimulated ***,oral administration of HHuMin-U increased IFN-βlevels in the ileum of mice and altered the gut microbiome *** results suggest the species/strain-specific importance of gut microbial composition for antiviral immune responses and the potential use of HHuMin-U as a probiotic agent.

关键词： TBK1 interferon protective

Robust and Reusable Fuzzy Extractors from Non-Uniform Learning with Errors Problem

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Computers, Materials & Continua 2023年第1期74卷 1985-2003页

作者： Joo Woo Jonghyun Kim Jong hwan park Graduate School of Information Security Korea UniversitySeoul02841Korea Department of Computer Science Sangmyung UniversitySeoul03016Korea

Afuzzy extractor can extract an almost uniformrandom string from a noisy source with enough entropy such as biometric *** reproduce an identical key from repeated readings of biometric data,the fuzzy extractor generates a helper data and a random string from biometric data and uses the helper data to reproduce the random string from the second *** 2013,Fuller et *** a computational fuzzy extractor based on the learning with errors *** construction,however,can tolerate a sub-linear fraction of errors and has an inefficient decoding algorithm,which causes the reproducing time to increase *** 2016,Canetti et *** a fuzzy extractor with inputs from low-entropy distributions based on a strong primitive,which is called digital ***,their construction necessitates an excessive amount of storage space for the helper data,which is stored in authentication *** on these observations,we propose a new efficient computational fuzzy extractorwith small size of helper *** scheme supports reusability and robustness,which are security notions that must be satisfied in order to use a fuzzy extractor as a secure authentication method in real ***,it conceals no information about the biometric data and thanks to the new decoding algorithm can tolerate linear *** on the non-uniform learning with errors problem,we present a formal security proof for the proposed fuzzy ***,we analyze the performance of our fuzzy extractor scheme and provide parameter sets that meet the security *** a result of our implementation and analysis,we show that our scheme outperforms previous fuzzy extractor schemes in terms of the efficiency of the generation and reproduction algorithms,as well as the size of helper data.

关键词： Fuzzy extractor reusability robustness biometric authentication non-uniform learning with errors