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Self-supported VO_(2) on polydopamine-derived pyroprotein-based fibers for ultrastable and flexible aqueous zinc-ion batteries

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Carbon Energy 2024年第7期6卷 1-13页

作者： Jeong seok Yeon Sul Ki Park Shinik Kim Santosh VMohite Won Il Kim Gun jang hyun-seok jang Jiyoung Bae Sang Moon Lee Won GHong Byung Hoon Kim Yeonho Kim Ho seok Park School of Chemical Engineering College of EngineeringSungkyunkwan UniversityGyeonggi-doRepublic of Korea Department of Engineering University of CambridgeCambridgeUK Department of Applied Chemistry Konkuk UniversityChungjuRepublic of Korea Department of Chemistry Ulsan National Institute of Science and Technology(UNIST)College of Natural SciencesUlsanRepublic of Korea Department of Physics Incheon National UniversityIncheonRepublic of Korea Intelligent Sensor Convergence Research Center Incheon National UniversityIncheonRepublic of Korea Institute of Basic Science Incheon National UniversityIncheonRepublic of Korea Division of Material Analysis and Research Korea Basic Science InstituteDaejeonRepublic of Korea

A conventional electrode composite for rechargeable zinc-ion batteries(ZIBs)includes a binder for strong adhesion between the electrode material and the current ***,the introduction of a binder leads to electrochemical inactivity and low electrical conductivity,resulting in the decay of the capacity and a low rate *** present a binder-and conducting agent-free VO_(2) composite electrode using in situ polymerization of dopamine on a flexible current collector of pyroprotein-based *** as-fabricated composite electrode was used as a substrate for the direct growth of VO_(2) as a self-supported form on polydopamine-derived pyroprotein-based fibers(pp-fibers@VO_(2)(B)).It has a high conductivity and flexible nature as a current collector and moderate binding without conventional binders and conducting agents for the VO_(2)(B) *** addition,their electrochemical mechanism was *** energy storage is induced by Zn^(2+)/H^(+) coinsertion during discharging,which can be confirmed by the lattice expansion,the formation of by-products including Zn_(x)(OTf)_(y)(OH)_(2x−y)·nH_(2)O,and the reduction of V^(4+)to V^(3+).Furthermore,the assembled Zn//pp-fibers@VO_(2)(B) pouch cells have excellent flexibility and stable electrochemical performance under various bending states,showing application possibilities for portable and wearable power sources.

关键词： aqueous battery binder free conducting agent‐free flexible electrode zinc‐ion battery

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Antiphospholipid syndrome with renal and splenic infarction after blunt trauma:A case report

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World Journal of Clinical Cases 2022年第26期10卷 9404-9410页

作者： Na-A Lee Eui-Sung Jeong hyun-seok jang Yun-Chul Park Ji-Hyoun Kang Jung-Chul Kim Young-Goun Jo Division of Trauma Department of SurgeryChonnam National University Medical School and HospitalGwangju 61469South Korea Division of Rheumatology Department of Internal MedicineChonnam National University Medical School and HospitalGwangju 61469South Korea

BACKGROUND In trauma patients,bleeding is an immediate major *** the same time,there are few cases of acute vascular occlusion after blunt trauma,and it is unclear what assessment and diagnosis should be considered for these ***,we describe a patient diagnosed with antiphospholipid syndrome after a hypercoagulable workup for acute renal and splenic vascular occlusion due to blunt *** SUMMARY A 20-year-old man was admitted to the emergency department with abdominal pain after hitting a tree while riding a sled 10 h *** had no medical *** investigations revealed occlusion of the left renal artery with global infarction of the left kidney and occlusion of branches of the splenic artery with infarction of the central portion of the *** revascularization of the left renal artery occlusion through percutaneous transluminal angioplasty failed due to difficulty in passing the wire through the total *** the presence of acute multivascular occlusions in a young man with low cardiovascular risk,additional laboratory tests were performed to evaluate *** results suggested a high possibility of antiphospholipid *** with a subcutaneous injection of enoxaparin was started and changed to oral warfarin after two *** diagnosis was confirmed,and he continued to visit the rheumatology outpatient clinic while taking *** A hypercoagulable workup can be considered in trauma patients with acute multivascular occlusion,especially in young patients with low cardiovascular risk.

关键词： Wounds and injuries Wounds Nonpenetrating Antiphospholipid syndrome Renal artery obstruction Splenic infarction Case reports

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Neural Regeneration Research 2014年第9期9卷 986-989页

作者： Yong hyun Kwon Sung Ho jang Sang seok Yeo Department of Physical Therapy Yeungnam University College Department of Physical Medicine and Rehabilitation College of Medi-cine Yeungnam University Department of Physical Therapy College of Health Sciences Dankook University

Introduction Aging is the accumulation of multidimensional deterioration of process- ing of biological, psychological, and social changes with expansion over time （Bowen and Atwood, 2004; Grady, 2012）. Aging-related changes are typically accompanied by decline in cognitive function, urinary control, sensory-motor function, and gait ability （Bradley et al., 1991; Bowen and Atwood, 2004; Hedden and Gabrieli, 2004; Grady, 2012; Moran et al., 2012）. In addition, a number of studies have suggested changes in brain structure with normal aging, such as decrease in cortical thickness or increase in ventricular width （Blatter et al., 1995; Tang et al., 1997; Uylings and de Brabander, 2002; Preul et al., 2006; Apostolova et al., 2012）. In particular, ventricular enlargement has been suggested as a structural biomarker for normal aging and progression of some illnesses, such as Alzheimer＇s disease （Blatter et al., 1995; Tang et al.,

关键词： Age-related changes of lateral ventricular width and periventricular white matter in the human brain a diffusion tensor imaging study

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Cortical activation pattern during shoulder simple versus vibration exercises： a functional near infrared spectroscopy study

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Neural Regeneration Research 2017年第8期12卷 1294-1298页

作者： Sung Ho jang Sang seok Yeo Seung hyun Lee Sang hyun Jin Mi Young Lee Department of Physical Medicine and Rehabilitation College of Medicine Yeungnam University Daegu Republic of Korea Department of Physical Therapy College of Health Science Dankook University Cheonan-si Republic of Korea Robot System Research Division Daegu Gyeongbuk Institute of Science & Technology Daegu Republic of Korea Department of Physical Therapy College of Health and Therapy Daegu Haany University Gyeongsan-si Republic of Korea

To date, the cortical effect of exercise has not been fully elucidated. Using the functional near infrared spectroscopy, we attempted to compare the cortical effect between shoulder vibration exercise and shoulder simple exercise. Eight healthy subjects were recruited for this study. Two different exercise tasks（shoulder vibration exercise using the flexible pole and shoulder simple exercise） were performed using a block paradigm. We measured the values of oxygenated hemoglobin in the four regions of interest： the primary sensory-motor cortex（SM1 total, arm somatotopy, and leg and trunk somatotopy）, the premotor cortex, the supplementary motor area, and the prefrontal cortex. During shoulder vibration exercise and shoulder simple exercise, cortical activation was observed in SM1（total, arm somatotopy, and leg and trunk somatotopy）, premotor cortex, supplementary motor area, and prefrontal cortex. Higher oxygenated hemoglobin values were also observed in the areas of arm somatotopy of SM1 compared with those of other regions of interest. However, no significant difference in the arm somatotopy of SM1 was observed between the two exercises. By contrast, in the leg and trunk somatotopy of SM1, shoulder vibration exercise led to a significantly higher oxy-hemoglobin value than shoulder simple exercise. These two exercises may result in cortical activation effects for the motor areas relevant to the shoulder exercise, especially in the arm somatotopy of SM1. However, shoulder vibration exercise has an additional cortical activation effect for the leg and trunk somatotopy of SM1.

关键词： nerve regeneration functional near infrared spectroscopy cortical activation shoulder vibrationexercise flexible pole neural regeneration

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The cortical activation pattern during bilateral arm raising movements

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Neural Regeneration Research 2017年第2期12卷 317-320页

作者： Sung Ho jang Jung Pyo Seo Seung-hyun Lee Sang-hyun Jin Sang seok Yeo Department of Physical Medicine and Rehabilitation College of Medicine Yeungnam University Daegu Republic of Korea Robot System Research Division Daegu Gyeongbuk Institute of Science & Technology Daegu Republic of Korea Department of Physical Therapy College of Health Sciences Dankook University Cheonan-si Chungnam Republic of Korea

Bilateral arm raising movements have been used in brain rehabilitation for a long time. However, no study has been reported on the effect of these movements on the cerebral cortex. In this study, using functional near infrared spectroscopy（f NIRS）, we attempted to investigate cortical activation generated during bilateral arm raising movements. Ten normal subjects were recruited for this study. f NIRS was performed using an f NIRS system with 49 channels. Bilateral arm raising movements were performed in sitting position at the rate of 0.5 Hz. We measured values of oxyhemoglobin and total hemoglobin in five regions of interest： the primary sensorimotor cortex, premotor cortex, supplementary motor area, prefrontal cortex, and posterior parietal cortex. During performance of bilateral arm raising movements, oxyhemoglobin and total hemoglobin values in the primary sensorimotor cortex, premotor cortex, supplementary motor area, and prefrontal cortex were similar, but higher in these regions than those in the prefrontal cortex. We observed activation of the arm somatotopic areas of the primary sensorimotor cortex and premotor cortex in both hemispheres during bilateral arm raising movements. According to this result, bilateral arm raising movements appeared to induce large-scale neuronal activation and therefore arm raising movements would be good exercise for recovery of brain functions.

关键词： nerve regeneration neuronal activation bilateral arm raising functional NIRS motor control corticospinal tract corticoreticulospinal tract neural regeneration

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Corrosion characteristics of steel in seawater containing various chloride concentrations generated by electrochemical method

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中国有色金属学会会刊：英文版 2009年第B9期19卷 50-55页

作者： Seong-Jong KIM seok-Ki jang Division of Marine Engineering Mokpo Maritime University

The electro-clean system (ECS), a ballast water management system that eliminates harmful aquatic organisms in ship ballast water via electrochemically produced chloride, was developed. The current density for potentiostatic experiments subjected to seawater with an applied potential (-0.1 V) at various TRC concentrations (2×10-6, 6×10-6, 10×10-6, and 15×10-6) have similar results. The current density at -0.1 V has the highest value compared with that at -0.7 V and -0.4 V. For all concentrations, the current density increases with increasing applied potential.

关键词：含氯化物电化学方法腐蚀特性浓度海水船舶压载水钢铁电流密度

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Three-dimensional label-free morphology of CD8+T cells as a sepsis biomarker

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Light(Science & Applications) 2023年第12期12卷 2565-2576页

作者： MinDong Sung Jong hyun Kim hyun-seok Min Sooyoung jang JaeSeong Hong Bo Kyu Choi JuHye Shin Kyung Soo Chung Yu Rang Park Division of Pulmonary and Critical Care Medicine Department of Internal MedicineYonsei University College of MedicineSeoulRepublic of Korea Department of Biomedical Systems Informatics Yonsei University College of MedicineSeoulRepublic of Korea Tomocube Inc155 Sinseong-roShinsung-dongYuseong-guDaejeonRepublic of Korea

Sepsis is a dysregulated immune response to infection that leads to organ dysfunction and is associated with a high incidence and mortality *** lack of reliable biomarkers for diagnosing and prognosis of sepsis is a major challenge in its *** aimed to investigate the potential of three-dimensional label-free CD8+T cell morphology as a biomarker for *** study included three-time points in the sepsis recovery cohort(N=8)and healthy controls(N=20).Morphological features and spatial distribution within cells were compared among the patients'*** developed a deep learning model to predict the diagnosis and prognosis of sepsis using the internal cell *** between the morphological features and clinical indices were *** morphological features and spatial distribution differed significantly between patients with sepsis and healthy controls and between the survival and non-survival *** model for predicting the diagnosis and prognosis of sepsis showed an area under the receiver operating characteristic curve of nearly 100%with only a few cells,and a strong correlation between the morphological features and clinical indices was *** study highlights the potential of three-dimensional label-free CD8+T cell morphology as a promising biomarker for *** approach is rapid,requires a minimum amount of blood samples,and has the potential to provide valuable information for the early diagnosis and prognosis of sepsis.

关键词： sepsis diagnosis Morphological

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Machine Vision Based Fish Cutting Point Prediction for Target Weight

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Computers, Materials & Continua 2023年第4期75卷 2247-2263页

作者： Yonghun jang Yeong-seok Seo Department of Computer Engineering Yeungnam UniversityGyeongsan38541Korea

Food processing companies pursue the distribution of ingredientsthat were packaged according to a certain weight. Particularly, foods like fishare highly demanded and supplied. However, despite the high quantity offish to be supplied, most seafood processing companies have yet to installautomation equipment. Such absence of automation equipment for seafoodprocessing incurs a considerable cost regarding labor force, economy, andtime. Moreover, workers responsible for fish processing are exposed to risksbecause fish processing tasks require the use of dangerous tools, such aspower saws or knives. To solve these problems observed in the fish processingfield, this study proposed a fish cutting point prediction method based onAI machine vision and target weight. The proposed method performs threedimensional(3D) modeling of a fish’s form based on image processing techniquesand partitioned random sample consensus (RANSAC) and extracts 3Dfeature information. Then, it generates a neural network model for predictingfish cutting points according to the target weight by performing machinelearning of the extracted 3D feature information and measured weight *** study allows for the direct cutting of fish based on cutting pointspredicted by the proposed method. Subsequently, we compared the measuredweight of the cut pieces with the target weight. The comparison result verifiedthat the proposed method showed a mean error rate of approximately 3%.

关键词： Machine vision fish cutting weight prediction artificial intelligence deep learning image processing

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Weighted Gauss-Seidel Precoder for Downlink Massive MIMO Systems

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Computers, Materials & Continua 2021年第5期67卷 1729-1745页

作者： Jun-Yong jang Won-seok Lee Jae-hyun Ro Young-Hawn You Hyoung-Kyu Song Department of Information and Communication Engineering Convergence Engineering for Intelligent DroneSejong UniversitySeoul05006Korea Department of Computer Engineering Sejong UniversitySeoul05006Korea

In this paper,a novel precoding scheme based on the Gauss-Seidel(GS)method is proposed for downlink massive multiple-input multiple-output(MIMO)*** GS method iteratively approximates the matrix inversion and reduces the overall complexity of the precoding *** addition,the GS method shows a fast convergence rate to the Zero-forcing(ZF)method that requires an exact invertible ***,to satisfy demanded error performance and converge to the error performance of the ZF method in the practical condition such as spatially correlated channels,more iterations are necessary for the GS method and increase the overall *** efficient approximation with fewer iterations,this paper proposes a weighted GS(WGS)method to improve the approximation accuracy of the GS *** optimal weights that accelerate the convergence rate by improved accuracy are computed by the least square(LS)*** the computation of weights,the different weights are applied for each iteration of the GS *** addition,an efficient method of weight computation is proposed to reduce the complexity of the LS *** simulation results show that bit error rate(BER)performance for the proposed scheme with fewer iterations is better than the GS method in spatially correlated channels.

关键词： Massive MIMO GS matrix inversion complexity weight

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Effects of solution heat treatment on corrosion resistance of 5083F Al alloy

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中国有色金属学会会刊：英文版 2009年第4期19卷 887-891页

作者： Seong-Jong KIM seok-Ki jang Division of Marine Engineering Mokpo Maritime University

Aluminum alloys are used as substitutes for fiber reinforced polymer(FRP) in ships and ***,ships constructed with 5000-series Al alloy suffer a little corrosion in the marine environment,when they run in high speed,and high flow rate,***,solution heat treatment was carried out to prevent *** optimal heat treatment involved heating specimens for 120 min at 420 ℃ and then cooling them in *** addition,the optimal ageing condition involved ageing specimens for 240 min at 180 ℃.The slow strain rate test(SSRT) in a seawater revealed that heat treatment under optimal conditions produced improved elongation,time-to-fracture and amount of dimples compared with the as-received specimen.

关键词：铝合金腐蚀性固溶处理热处理生产纤维增强聚合物电阻慢应变速率海洋环境

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