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中国有色金属学会会刊：英文版 2012年第S3期22卷 624-628页

作者： Jun-Won kwon Myoung-Soo KANG Sung-Ook YOON yong-Jai kwon Sung-Tae HONG Dae-Il KIM Kwang-Hak LEE Jong-Dock SEO Jin-Soo MOON Kyung-Sik HAN School of Materials Science and Engineering University of Ulsan School of Mechanical Engineering University of Ulsan Technical Research Laboratories Shin Young Co.Ltd. Automotive Parts Innovation Center Ulsan Technopark

AA5454-O aluminum alloy plates with thicknesses of 1.4 and 1.0 mm were friction-stir-lap-welded (FSLWed).The influences of the tool plunge depth and welding distance on surface appearance,macrostructure and mechanical properties of the FSLWed plates were experimentally *** tensile shear load of the FSLWed plates was compared with that of the adhesive-bonded ***-free FSLWed zones were successfully obtained in all the tool plunge depths and the welding *** FSLWed zones exhibited the relatively smooth surface *** all the FSLWed conditions,the FSLWed zone exhibited higher average hardness than the base *** addition,the upper plate exhibited a higher average hardness than the lower plate,although there was no special tendency in spite of the change in the tool plunge depth and the welding *** maximum tensile shear load of the FSLWed plates was much higher than that of the adhesive-bonded aluminum alloy ***,under the FSLW condition of the plunge depth of 1.8 mm and the welding distance of 40 mm,the tensile shear load of the FSLWed plate reached a level about 41% greater than that of the adhesive-bonded aluminum alloy *** addition,the maximum tensile shear load of the FSLWed plate was increased with the increase of the welding distance.

关键词： friction stir lap welding AA5450-O aluminum alloy tool plunge depth welding distance mechanical properties

IFN-γ in tissue-immune homeostasis and antitumor immunity

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Cellular & Molecular Immunology 2018年第5期15卷 531-532页

作者： Byungsuk kwon Department of Biomedical Science School of Biological SciencesUniversity of UlsanUlsan 44610Korea Biomedical Research Center Ulsan University HospitalCollege of MedicineUniversity of UlsanUlsan 44033Korea

Tissue-resident immune cells are known to be derived from their circulating precursors and migrate to tissues for host *** studies have revealed heterogeneity in the origin and proliferation properties of macrophages,which are a prototype tissue-resident immune *** tissue-resident macrophages can originate from embryonic and fetal sources and are selfmaintained by continuous local self-renewal.1,2 As accessory cells,tissue-resident macrophages support parenchymal cells(their‘client cells’),and their functions range from tissue development to tissue homeostasis(for example,osteoclasts,lung macrophages,microglia,splenic red-pulp macrophages,and Kupffer cells).Although macrophages are known as the major immune cell with tissue-specific functions,new frameworks integrating the functions of other immune cells with the maintenance of tissue homeostasis will be likely established in the near future.

关键词： homeostasis immunity lung

Circadian fluctuations in three types of sensory modules in healthy subjects

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Neural Regeneration Research 2014年第4期9卷 436-439页

作者： yong Hyun kwon Ki Seok Nam Department of Physical Therapy Yeungnam University College of Science and TechnologyHyunchung-roNam-guDaeguRepublic of Korea

This study was designed to observe and compare the circadian fluctuations in tactile sense, joint reposition sense and two-point discrimination in healthy subjects. Twenty-one healthy adult subjects received perceptual ability tests through these three different sensory modules at approximately 9：00, 13：00 and 18：00 in a day. The distribution of ranking for perceptual ability was significantly different among the three different time points in each individual, with highest perceptual ability in the evening compared with noon and morning, in terms of tactile sense and two-point discrimination. These findings suggest that the perceptual ability of healthy subjects fluctuates according to the time points in a day.

关键词： nerve regeneration circadian pattern biological rhythm circadian fluctuations perceptual ability tactile sensory joint reposition sense two-point discrimination Basic Science ResearchProgram through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology neural regeneration

Laser‑Induced and MOF‑Derived Metal Oxide/Carbon Composite for Synergistically Improved Ethanol Sensing at Room temperature

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Nano-Micro Letters 2024年第6期16卷 210-220页

作者： Hyeongtae Lim Hyeokjin kwon Hongki Kang Jae Eun Jang Hyuk‑Jun kwon Department of Electrical Engineering and Computer Science DGISTDaegu 42988South Korea Convergence Research Advanced Centre for Olfaction DGISTDaegu 42988South Korea

Advancements in sensor technology have significantly enhanced atmospheric ***,metal oxide and carbon(MO_(x)/C)hybrids have gained attention for their exceptional sensitivity and room-temperature sensing ***,previous methods of synthesizing MO_(x)/C composites suffer from problems,including inhomogeneity,aggregation,and challenges in ***,we introduce a refined method that employs a metal–organic framework(MOF)as a precursor combined with direct laser *** inherent structure of MOFs ensures a uniform distribution of metal ions and organic linkers,yielding homogeneous MO_(x)/C *** laser processing facilitates precise micropatterning(<2μm,comparable to typical photolithography)of the MO_(x)/C *** optimized MOF-derived MO_(x)/C sensor rapidly detected ethanol gas even at room temperature(105 and 18 s for response and recovery,respectively),with a broad range of sensing performance from 170 to 3,400 ppm and a high response value of up to 3,500%.Additionally,this sensor exhibited enhanced stability and thermal resilience compared to previous MOF-based *** research opens up promising avenues for practical applications in MOF-derived sensing devices.

关键词： Metal-organic frameworks Metal oxide Carbon composite Laser Gas sensor

Lithium plating-free 1 Ah-level high-voltage lithium-ion pouch battery via ambi-functional pentaerythritol disulfate

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Journal of Energy Chemistry 2023年第8期83卷 229-238,I0007页

作者： Dung Tien Tuan Vu Jinsol Im Jae-Hee Kim Jisoo Han Gyeong Jun Chung Giang Thi Huong Nguyen Junhyeok Seo Minjae Kim Eui-Hyung Hwang Young-Gil kwon Jae Wook Shin kuk Young Cho Seung-Wan Song Department of Chemical Engineering&Applied Chemistry Chungnam National UniversityDaejeon 34134Republic of Korea Department of Materials Science&Chemical Engineering Hanyang UniversityAnsan 15588Republic of Korea Fine Chem Co.Ltd. Daejeon 34365Republic of Korea d CSIM Co.Ltd. Yesan 32400Republic of Korea Dongwha Electrolyte Nonsan 32925Republic of Korea

Elevating the charge cut-off voltage beyond traditional 4.2 V is a commonly accepted technology to increase the energy density of Li-ion batteries(LIBs) but the risk of Li-dendrites and fire hazard increases as well. The use of ambi-functional additive, which forms stable solid electrolyte interphase(SEI) simultaneously at both cathode and anode, is a key to enabling a dendrites-free and well-working high-voltage LIB. Herein, a novel ambi-functional additive, pentaerythritol disulfate(PEDS), at 1 wt% without any other additive is demonstrated. We show the feasibility and high impacts of PEDS in forming lithium sulfateincorporated robust SEI layers at NCM523 cathode and graphite anode in 1 Ah-level pouch cell under4.4 V, 25 °C and 0.1 C rate, which mitigates the high-voltage instability, metal-dissolution and cracks on NCM523 particles, and prevents Li-dendrites at graphite anode. Improved capacity retention of 83%after 300 cycles is thereby achieved, with respect to 69% with base electrolyte, offering a promising path toward the design of practical high-energy LIBs.

关键词： Lithium-ion pouch cell Lithium plating-free High-voltage Ambi-functional additive SEI layer

1D-CNN:Speech Emotion Recognition System Using a Stacked Network with Dilated CNN Features

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Computers, Materials & Continua 2021年第6期67卷 4039-4059页

作者： Mustaqeem Soonil kwon Interaction Technology Laboratory Department of SoftwareSejong UniversitySeoul05006Korea

Emotion recognition from speech data is an active and emerging area of research that plays an important role in numerous applications,such as robotics,virtual reality,behavior assessments,and emergency call ***,researchers have developed many techniques in this field in order to ensure an improvement in the accuracy by utilizing several deep learning approaches,but the recognition rate is still not *** main aim is to develop a new technique that increases the recognition rate with reasonable cost *** this paper,we suggested a new technique,which is a one-dimensional dilated convolutional neural network(1D-DCNN)for speech emotion recognition(SER)that utilizes the hierarchical features learning blocks(HFLBs)with a bi-directional gated recurrent unit(BiGRU).We designed a one-dimensional CNN network to enhance the speech signals,which uses a spectral analysis,and to extract the hidden patterns from the speech signals that are fed into a stacked one-dimensional dilated network that are called *** HFLB contains one dilated convolution layer(DCL),one batch normalization(BN),and one leaky_relu(Relu)layer in order to extract the emotional features using a hieratical correlation ***,the learned emotional features are feed into a BiGRU in order to adjust the global weights and to recognize the temporal *** final state of the deep BiGRU is passed from a softmax classifier in order to produce the probabilities of the *** proposed model was evaluated over three benchmarked datasets that included the IEMOCAP,EMO-DB,and RAVDESS,which achieved 72.75%,91.14%,and 78.01%accuracy,respectively.

关键词： Affective computing one-dimensional dilated convolutional neural network emotion recognition gated recurrent unit raw audio clips

Clostridium paraputrificum septicemia and liver abscess

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World Journal of Hepatology 2018年第3期10卷 388-395页

作者： yong K kwon Faiqa A Cheema Bejon T Maneckshana Caroline Rochon Patricia A Sheiner Department of Transplant Hartford HospitalHartfordCT 06106United States

We report the first case of a healthy 23-year-old female who underwent an interventional radiology-guided embolization of a hepatic adenoma, which resulted in a gas forming hepatic liver abscess and septicemia by Clostridium paraputrificum. A retrospective review of Clostridial liver abscesses was performed using a Pub Med literature search, and we found 57 clostridial hepatic abscess cases. The two most commonly reported clostridial species are C. perfringens and C. septicum(64.9% and 17.5% respectively). C. perfringens cases carried a mortality of 67.6% with median survival of 11 h, and 70.2% of the C. perfringens cases experienced hemolysis. All C. septicum cases were found to have underlying liver malignancy at the time of the presentation with a mortality of only 30%. The remaining cases were caused by various Clostridium species, and this cohort's clinical course was significantly milder when compared to the above C. perfringens and C. septicum cohorts.

关键词： Clostridium Hemolysis Liver cell adenoma Morbidity Mortality Pyogenic liver abscess

Hemorrhagic hemangioma in the liver:A case report

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World Journal of Gastroenterology 2015年第23期21卷 7326-7330页

作者： Jeong Min Kim Woo Jin Chung Byoung kuk Jang Jae Seok Hwang yong Hoon Kim Jung Hyeok kwon Mi Sun Choi Department of Internal Medicine Keimyung University School of Medicine Department of Hepatobiliary Surgery Keimyung University School of Medicine Department of Radiology Keimyung University School of Medicine Department of Pathology Keimyung University School of Medicine

Hemangioma is the most common type of benign tumor that arises in the liver. Although rupture and hemorrhage of hepatic hemangioma are rare complications, they can be the cause of mortality. The authors report a case of hemorrhagic hepatic hemangioma: in a 54-yearold woman who was admitted with epigastric *** had taken oral contraceptives several weeks *** results of a blood examination were normal. An abdominal computed tomography scan revealed a tumor in hepatic segment 4, and a hemorrhage inside the cystic mass was suspected. The mass was removed laparoscopically to confirm the tumor properties and control the hemorrhage. The pathologic findings of the resected mass were consistent with hepatic hemangioma with intratumoral hemorrhage. The patient was discharged 8 d after the surgery, without further complications or complaints, and the patient's condition was found to have improved during follow-up.

关键词： Hemangioma Liver Hemorrhage Tumor Complication

Interface characterization of Al/Cu 2-ply composites under various loading conditions

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Transactions of Nonferrous Metals Society of China 2014年第S1期24卷 36-41页

作者： Kwang Seok LEE Su Eun LEE yong-Nam kwon Materials Deformation Department Light Metal DivisionKorea Institute of Materials Science

The effects of reduction ratio during roll bonding on the microstructural evolution at interface and subsequent mechanical properties of roll-bonded Al/Cu 2-ply sheets were investigated. The interface microstructures for several Al/Cu 2-ply sheets fabricated under different reduction ratios between 30% and 65% were verified by transmission electron microscopy(TEM). Taking the difference of interface microstructure into consideration, 3-point bending and peel tests were performed for obtaining flexural and bonding strengths for Al/Cu 2-ply sheets. The effect of the quantified areas of metallurgical bonding at interfaces on the bonding strength was also discussed. The results show that both the bonding and flexural strengths for Al/Cu 2-ply sheets are reduced by decreasing the reduction ratio during the roll bonding process, which is strongly correlated with the interface microstructure. This was especially verified by observing the interface delamination from the 3-point bent samples.

关键词： Al/Cu 2-ply composite flexural strength roll bonding reduction ratio interface

New results on stability criteria for neural networks with time-varying delays

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Chinese Physics B 2011年第5期20卷 163-173页

作者： O.M.kwon J.W.kwon S.H.Kim School of Electrical Engineering Chungbuk National University410 SungBong-RoHeungduk-guCheongju 361-763Republic of Korea Department of Computer Engineering Kyungwon UniversitySan 65Sujung-guSungnam 461-701Republic of Korea School of Integrated Technology College of EngineeringYonsei University50 Yonsei-RoSeodaemun-guSeoul 120-749Republic of Korea

In this paper, the problem of stability analysis for neural networks with time-varying delays is considered. By constructing a new augmented Lyapunov-Krasovskii＇s functional and some novel analysis techniques, improved delaydependent criteria for checking the stability of the neural networks are established. The proposed criteria are presented in terms of linear matrix inequalities （LMIs） which can be easily solved and checked by various convex optimization algorithms. Two numerical examples are included to show the superiority of our results.

关键词： neural networks time-varying delays stability Lyapunov method