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CES Transactions on Electrical Machines and Systems 2021年第3期5卷 224-231页

作者： tae-Woo Lee Do-Kwan Hong tae-uk jung the Energy and Power Conversion Engineering Department University of Science and TechnologyChangwon51543 Korea Electric Machines and Drives Research Center Korea Electrotechnology Research InstituteChangwon51543 South Korea the Electrical Engineering Department Kyungnam UniversityChangwon51767 South Korea

In this paper,a design is presented for a high-speed,high-power motor for a four-legged robot actuator that was optimized using the weighted sum method(WSM)based on the Taguchi method,and the response surface method(RSM).First,output torque,torque constant,torque ripple,and efficiency were selected as objective functions for the optimized *** sampling method was implemented to use a mixed orthogonal array and the single response characteristics of each objective function were compared using the Taguchi ***,to consider the multi-response characteristic of the objective functions,WSM was ***,the 2D finite element analysis result of the RSM was compared with that using the ***,an experiment was carried out on the manufactured motor and the optimized model is presented here.

关键词： Four-legged robot Multiphysics analysis Optimized design Surface mounted permanent magnet synchronous motor

用于电流馈电双有源桥式变换器的控制漏感高频变压器的设计优化

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磁性元件与电源 2018年第9期 163-165页

作者： tae-uk jung Myung-Hwan Kim Jin-Hyung Yoo 韩国庆南大学电气工程学院 LG电子公司电子研发实验室

用于光伏发电的电流馈电双有源电桥转换器通常可能需要给定的泄漏或额外的电感，以便提供对电流的适当控制。因此，许多研究都集中在高频变压器的漏感控制上，以集成一个额外的电感器。本文提出了一种非对称绕组配置，以获得高频变压器... 详细信息

用于光伏发电的电流馈电双有源电桥转换器通常可能需要给定的泄漏或额外的电感，以便提供对电流的适当控制。因此，许多研究都集中在高频变压器的漏感控制上，以集成一个额外的电感器。本文提出了一种非对称绕组配置，以获得高频变压器的受控漏电感，以提高电流馈电双有源桥式变换器的效率。为了精确分析，该设计使用了与高频开关电路相连的变压器的耦合电磁分析模型。通过利用设计分析模型，给出了高效率的设计优化步骤，并通过实验结果验证。

关键词：高频变压器桥式变换器设计优化电流馈电有源电桥控制漏感光伏发电

Comprehensive molecular characterization to predict immunotherapy response in advanced biliary tract cancer: a phase II trial of pembrolizumab

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Oncology research 2025年第1期33卷 57-65页

作者： Ryul Kim Joo Kyung Park Minsuk Kwon Minae An jung Yong Hong Joon Oh Park Sung Hee Lim Seung tae Kim Division of Hematology-Oncology Department of Medicine Samsung Medical Center Sungkyunkwan University School of Medicine Seoul Korea. Division of Gastroenterology Department of Medicine Samsung Medical Center Sungkyunkwan University School of Medicine Seoul Korea. Department of Hematology-Oncology Ajou University School of Medicine Suwon-si Gyeonggi-do Korea. Samsung Advanced Institute of Health Science and Technology Sungkyunkwan University School of Medicine Seoul Korea.

Background:Immune checkpoint inhibitors (ICIs) are effective in a subset of patients with metastatic solid tumors. However, the patients who would benefit most from ICIs in biliary tract cancer (BTC) are still controversial.Materials and methods:We molecularly characterized tissues and blood from 32 patients with metastatic BTC treated with the ICI pembrolizumab as second-line therapy.Results:All patients had microsatellite stable (MSS) type tumors. Three of the 32 patients achieved partial response (PR), with an objective response rate (ORR) of 9.4% (95% confidence interval [CI], 2.0-25.2) and nine showed stable disease (SD), exhibiting a disease control rate (DCR) of 37.5% (95% CI, 21.1-56.3). For the 31 patients who had access to PD-1 ligand 1 (PD-L1) combined positive score (CPS) testing (cut-off value ≥1%), the ORR was not different between those who had PD-L1-positive (PD-L1+; 1/11, 9.1%) and PDL1-(2/20, 10.0%) tumors ( = 1.000). The tumor mutational burden (TMB) of PD-L1+ BTC was comparable to that of PD-L1-BTC ( = 0.630). TMB and any exonic somatic mutations were also not predictive of pembrolizumab response. Molecular analysis of blood and tumor samples demonstrated a relatively high natural killer (NK) cell proportion in the peripheral blood before pembrolizumab treatment in patients who achieved tumor response. Moreover, the tumors of these patients presented high enrichment scores for NK cells, antitumor cytokines, and Th1 signatures, and a low enrichment score for cancer-associated fibroblasts.Conclusions:This study shows the molecular characteristics associated with the efficacy of pembrolizumab in BTC of the MSS type.

关键词： Biliary tract cancer Pembrolizumab Whole-exome sequencing Whole-transcriptome sequencing

Performance analysis of QoS routing protocol for WiMedia networks

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Journal of Central South University 2012年第12期19卷 3468-3474页

作者： jung Jin-uk JIN Kyo-hong HWANG Min-tae JEON Young-ae Department of Electronics Engineering Changwon National UniversityChangwon 641-773Korea Department of Information Communication Changwon National UniversityChangwon 641-773Korea Green Converged Wireless Systems Research Team ETRIDaejeon 305-700Korea

Though the WiMedia supports higher data rates than other WPAN technologies,a WiMedia device cannot reach other devices that are separated from it by more than 10 m,which is the typical limited transmission range of the WiMedia *** this work,we propose a multi-hop QoS routing protocol to enable WiMedia devices to transmit real-time data to devices that are located out of the transmission *** proposed routing protocol is a hybrid algorithm,which mixes the table-driven and on-demand routing algorithms,searching one or more routes according to the number of hops to a destination *** MAC is potentially capable of learning the existence of neighbor devices by using a beacon *** utilizing the neighbors' information,all devices can create routing entries for devices within 2-hops *** devices beyond the 2-hop range,the newly designed on-demand routing algorithm is applied to multi-hop *** a routing entry for a destination device is not listed in the routing table,the source device sends a request packet to 2-hop range devices which could be found in the routing *** every device maintains routing entries for 2-hop range devices in the routing table,the request packet is replied in advance before its arrival at the destination ***,to decide the optimal route for a destination device,the number of medium access slots(MASs),received signal strength indicator(RSSI)and hop count are utilized to establish a QoS-enabled routing *** perform ns-2 simulation to investigate the performance of the proposed routing protocol with AODV and *** simulation results show that the proposed protocol has better throughput and lower overhead than other protocols.

关键词： WiMedia WPAN multi-hop routing protocol QoS hybrid routing protocol

Contrast-enhanced ultrasound in the diagnosis of nodules in liver cirrhosis

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World Journal of Gastroenterology 2014年第13期20卷 3590-3596页

作者： tae Kyoung Kim Hyun-jung Department of Medical Imaging Toronto General HospitalUniversity of TorontoToronto ON M5G 2N2Canada

Contrast-enhanced ultrasound(CEUS)using microbubble contrast agents are useful for the diagnosis of the nodules in liver *** can be used as a problem-solving method for indeterminate nodules on computed tomography(CT)or magnetic resonance imaging(MRI)or as an initial diagnostic test for small newly detected liver *** has unique advantages over CT and MRI including no renal excretion of contrast,real-time imaging capability,and purely intravascular *** carcinoma(HCC)is characterized by arterial-phase hypervascularity and later washout(negative enhancement).Benign nodules such as regenerative nodules or dysplastic nodules are usually isoechoic or slightly hypoechoic in the arterial phase and isoechoic in the late ***,there are occasional HCC lesions with atypical enhancement including hypovascular HCC and hypervascular HCC without *** are infrequently detected during HCC surveillance and mostly show rimlike or diffuse hypervascularity followed by rapid *** are often found at HCC surveillance and are easily diagnosed by *** can be effectively used in the diagnostic work-up of small nodules detected at HCC *** is also useful to differentiate malignant and benign venous thrombosis and to guide and monitor the local ablation therapy for HCC.

关键词： Hepatocellular carcinoma Liver cirrhosis Dysplastic nodule Contrast ultrasound Imaging

Climate technology promotion in the Republic of Korea

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Advances in Climate Change Research 2015年第3期6卷 229-233页

作者： jung tae Yong Graduate School of International Studies Yonsei University

The implementation of climate technologies and their commercialization ultimately depends on the success of their research and development(R&D) projects. In the Republic of Korea(ROK), twenty-seven climate technologies were selected to boost the greening of existing industries and to develop new green industries to promote a sustainable climate technology development strategy. Rechargeable battery technology, carbon capture and storage(CCS) technology, smart grids, and sewage treatment are all research areas expected to have tangible outcomes in the forthcoming years. As such, they were included in a comprehensive R&D plan for climate technology advancement, which places an emphasis on climate technology development and commercialization strategy. In this study, the R&D plan of the ROK is reviewed by examining its six core climate technology programs: solar cells, fuel cells, bioenergy, rechargeable battery technology, information technology(IT) applications for the power sector, and CCS technology in detail. The climate policy in the ROK aims to find new economic growth engines and to develop new business opportunities while actively participating in international efforts to combat climate change.

关键词： R&D plan and strategy Climate technology The Republic of Korea

Discovering High-Quality Threaded Discussions in Online Forums

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Journal of Computer Science & Technology 2014年第3期29卷 519-531页

作者： jung-tae Lee Min-Chul Yang Hae-Chang Rim Department of Computer and Radio Communications Engineering Korea UniversitySeoul 136-713Korea

Archives of threaded discussions generated by users in online forums and discussion boards contain valuable knowledge on various topics. However, not all threads are useful because of deliberate abuses, such as trolling and flaming, that are commonly observed in online conversations. The existence of various users with different levels of expertise also makes it difficult to assume that every discussion thread stored online contains high-quality contents. Although finding high-quality threads automatically can help both users and search engines sift through a huge amount of thread archives and make use of these potentially useful resources effectively, no previous work to our knowledge has performed a study on such task. In this paper, we propose an automatic method for distinguishing high-quality threads from low-quality ones in online discussion sites. We first suggest four different artificial measures for inducing overall quality of a thread based on ratings of its posts. We then propose two tasks involving prediction of thread quality without using post rating information. We adopt a popular machine learning framework to solve the two prediction tasks. Experimental results on a real world forum archive demonstrate that our method can significantly improve the prediction performance across all four measures of thread quality on both tasks. We also compare how different types of features derived from various aspects of threads contribute to the overall performance and investigate key features that play a crucial role in discovering high-quality threads in online discussion sites.

关键词： online forum discussion board thread quality

Environmental friendly synthesis of hierarchical mesoporous platinum nanoparticles templated by fucoidan biopolymer for enhanced hydrogen evolution reaction

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Journal of Materials Science & Technology 2020年第11期42卷 185-190页

作者： Seung Man Lim Kyunglee Kang Hongje Jang jung tae Park Department of Chemical Engineering Konkuk University120 Neungdong-roGwangjin-guSeoul 05029Republic of Korea Department of Chemistry Kwangwoon University20 Cwangwoon-roNowon-guSeoul 01897Republic of Korea

Researching novel hydrogen evolution reaction(HER)catalysts with enhanced electrocatalytic activity,excellent stability,and cost-efficiency is of great significance for the large-scale hydrogen production from industrial electrolysis *** report the preparation of hierarchical mesoporous-Pt nanoparticles(HM-Pt NPs)with coral-like rough surface morphologies using environmental friendly and biocompatible fucoidan(Fu)biopolymer as a surface engineering compound and its application to electrocatalysts for *** designed HM-Pt NPs yields better mass activity of electrocatalysts compared to a commercial Pt/***-Pt NPs showed an overpotential of 33 mV at 10 mA cm-2 for the HER in 0.5 MH2SO4,which was highly comparable to that of the commercial Pt/C catalysts(29 mV).However,the amount of HM-Pt NPs loaded in glassy carbon electrode(0.033 mg mL-1)was approximately 20 times lower than that of the commercial Pt/C(0.64 mg *** HM-Pt NPs also maintained high catalytic stability with a consistent HER current density after 1000 continuous *** excellent HER performance is attributed to the improved electrochemical surface area,highly porous structure,and good surface wettability of the HM-Pt NPs,which results in enhanced electrocatalytic activity,decreased resistance at the electrode/electrolyte interface,and facile penetration of the electrolytes inside the electrode.

关键词： Mesoporous Fucoidan Biopolymer Low Pt content Hydrogen evolution reaction

Fournier’s gangrene after insertion of thermo-expandable prostatic stent for benign prostatic hyperplasia:A case report

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World Journal of Clinical Cases 2023年第27期11卷 6498-6504页

作者： Hee Chang jung Yeong uk Kim Department of Urology Yeungnam University College of MedicineDaegu 42415South Korea

BACKGROUND Thermo-expandable urethral stent(Memokath 028)implantation is an alternative treatment for older patients with lower urinary tract symptoms and benign prostatic *** prostatic urethral stent implantation,minor complications such as urinary tract infection,irritative symptoms,gross hematuria,and urethral pain have been observed;however,there are no reports of life-threatening ***,we report a critical case of Fournier’s gangrene that occurred 7 years after prostatic *** SUMMARY An 81-years-old man with benign prostatic hyperplasia(volume,126 ccs;as measured by transrectal ultrasound)had undergone insertion of a thermoexpandable urethral stent(Memokath 028)as he was unfit for surgery under general ***,the patient had undergone a suprapubic cystostomy for recurrent acute urinary retention 4 years after the insertion of prostatic stent(Memokath 028).We had planned to remove the Memokath 028;however,the patient was lost to *** patient presented to the emergency department 3 years after the suprapubic cystostomy with necrotic changes from the right scrotum to the right inguinal *** digital rectal examination,tenderness and heat of prostate was ***,the black skin color change with foulsmelling from right scrotum to right inguinal area was *** computed tomography finding,subcutaneous emphysema was identified to same *** was diagnosed with Fournier’s gangrene based on the physical examination and computed tomography *** emergency room,Fournier’s gangrene severity index value is seven ***,he underwent emergent extended surgical debridement and removal of the Memokath ***-spectrum intravenous antibiotics were administered and additional necrotic tissue debridement was ***,the patient died 14 days after surgery due to multiorgan *** If Memokath 028 for benign prostatic hyperplasia is not working in older patients,its rapid

关键词： Urethral stents Minimally invasive surgery Complication Fournier’s gangrene Benign prostatic hyperplasia Case report

The Effect of Fabrication Conditions for GDC Buffer Layer on Electrochemical Performance of Solid Oxide Fuel Cells

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Nano-Micro Letters 2013年第3期5卷 151-158页

作者： jung-Hoon Song Myung Geun jung Hye Won Park Hyung-tae Lim Fuel Cell Project Research Institute of Industrial Science and Technology (RIST) School of Nano & Advanced Materials Engineering Changwon National University

A Gd-doped ceria（GDC） buffer layer is required between a conventional yttria-stabilized zirconia（YSZ） electrolyte and a La-Sr-Co-Fe-O3（LSCF） cathode to prevent their chemical reaction. In this study,the effect of varying the conditions for fabricating the GDC buffer layer, such as sintering temperature and amount of sintering aid, on the solid oxide fuel cell（SOFC） performance was investigated. A finer GDC powder（i.e., ultra-high surface area）, a higher sintering temperature（1290℃）, and a larger amount of sintering aid（12%） resulted in improved densification of the buffer layer; however, the electrochemical performance of an anode-supported cell containing this GDC buffer layer was poor. These conflicting results are attributed to the formation of（Zr, Ce）O2 and/or excess cobalt grain boundaries（GBs） at higher sintering temperatures with a large amount of sintering aid（i.e., cobalt oxide）. A cell comprising of a cobalt-free GDC buffer layer, which was fabricated using a low-temperature process, had lower cell resistance and higher stability. The results indicate that electrochemical performance and stability of SOFCs strongly depend on fabrication conditions for the GDC buffer layer.

关键词： Solid oxide fuel cell(SOFC) Gd-doped ceria Sintering aid Sol-gel spin coating