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Analysis of Material Loss Behavior According to Long-Term Experiments on LDIE-FAC Multiple Degradation of Carbon Steel Materials

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World Journal of Nuclear Science and Technology 2022年第1期12卷 1-10页

作者： Kyeong Mo Hwang Dong jin Lee Hun Yun Seung Chang yoo Ji Hyeon Kim SI Business Department KEPCO E&C Gimcheon-si Korea Nuclear Engineering Department UNIST Ulsan-si Korea

Recently, damage caused by liquid droplet impingement erosion (LDIE) in addition to flow-accelerated corrosion (FAC) has frequently occurred in the secondary side steam piping of nuclear power plants, and the damage-occurring frequency is expected to increase as their operating years’ increase. In order to scrutinize its causes, therefore, an experimental study was conducted to understand how the behavior of LDIE-FAC multiple degradation changes when the piping of nuclear power plants is operated for a long time. Experimental results show that more magnetite was formed on the surface of the carbon steel specimen than on the low-alloy steel specimen, and that the rate of magnetite formation and extinction reached equilibrium due to the complex action of liquid droplet impingement erosion and flow-accelerated corrosion after a certain period of time. Furthermore, it was confirmed at the beginning of the experiment that A106 Gr.B specimen has more mass loss than A335 P22 specimen. After a certain period of time, however, the mass loss tends to be the opposite. This is presumed to have resulted from the magnetite formed on the surface playing a role in suppressing liquid droplet impingement erosion. In addition, it was confirmed that the amount of erosion linearly increases under the conditions in which the formation and extinction of magnetite reach equilibrium.

关键词： Liquid Droplet Impingement Erosion (LDIE) Flow-Accelerated Corrosion (FAC) Multiple Degradations ToSPACE Wall Thinning Magnetite

Endoscopic papillary large balloon dilation for the removal of bile duct stones

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World Journal of Gastroenterology 2013年第46期19卷 8580-8594页

作者： jin Hong Kim Min Jae Yang Jae Chul Hwang Byung Moo yoo Department of Gastroenterology Ajou University School of Medicine

Endoscopic papillary large balloon dilation(EPLBD)with endoscopic sphincterotomy(EST)has been widely used as the alternative to EST along with endoscopic mechanical lithotripsy(EML)for the removal of large or difficult bile duct ***,EPLBD without EST was recently introduced as its simplified alternative ***,we systematically searched PubMed,Medline,the Cochrane Library and EMBASE,and analyzed all gathered data of EPLBD with and without EST,respectively,by using a single standardized definition,reviewing relevant literatures,published between 2003and June 2013,where it was performed with largediameter balloons(12-20 mm).The outcomes,including the initial success rate,the rate of needs for EML,and the overall success rate,and adverse events were assessed in each and compared between both of two procedures:"EPLBD with EST"and"EPLBD without EST".A total of 2511 procedures from 30 published articles were included in EPLBD with EST,while a total of413 procedures from 3 published articles were included in EPLBD without *** the results of outcomes,the overall success rate was 96.5%in EPLBD with EST and97.2%in EPLBD without EST,showing no significant difference between both of *** initial success rate(84.0%vs 76.2%,P<0.001)and the success rate of EPLBD without EML(83.2%vs 76.7%,P=0.001)was significantly higher,while the rate of use of EML was significantly lower(14.1%vs 21.6%,P<0.001),in EPLBD with *** rate of overall adverse events,pancreatitis,bleeding,perforation,other adverse events,surgery for adverse events,and fatal adverse events were 8.3%,2.4%,3.6%,0.6%,1.7%,0.2%and 0.2%in EPLBD with EST and 7.0%,3.9%,1.9%,0.5%,0.7%,0%and 0%in EPLBD without EST,respectively,showing no significant difference between both of *** conclusion,recent accumulated results of EPLBD with or even without EST suggest that it is a safe and effective procedure for the removal of large or difficult bile duct stones without any additional risk of severe adv

关键词： Balloon dilation Endoscopic sphincteroto-my Common bile duct gallstones Lithotripsy Compli-cations Assessment Patient outcomes

Long-term management of idiopathic cough with ultrasound-guided pulsed radiofrequency ablation of the phrenic nerve

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Chinese Medical Journal 2022年第12期135卷 1511-1512页

作者： yoo Jung Park Yong Ho Lee jinwoo Shim jin Young Lee Hyunhwa Lee Hue Jung Park Department of Anesthesiology and Pain Medicine St.Vincent’s HospitalCollege of MedicineThe Catholic University of KoreaSuwonRepublic of Korea Department of Anesthesiology and Pain Medicine Seoul St.Mary’s HospitalCollege of MedicineThe Catholic University of KoreaSeoulRepublic of Korea Department of Anesthesiology and Pain Medicine Samsung Medical CenterSungkyunkwan UniversitySchool of MedicineSeoulRepublic of Korea

To the Editor:Idiopathic cough is associated with laryngeal hypersensitivity and chronic pain *** cough can be diagnosed when patients have no cause of chronic cough after treatment of *** with chronic cough experience impaired quality of life(QOL),interruption of daily activity,and ***,better approaches to refractory chronic cough areneeded.

关键词： impaired Idiopathic cough

Prevalence of clonorchiasis in patients with gastrointestinal disease: A Korean nationwide multicenter survey

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World Journal of Gastroenterology 2009年第1期15卷 86-94页

作者： Ho Gak Kim Jimin Han Myung-Hwan Kim Kyu Hyun Cho Im Hee Shin Gwang Ha Kim Jae Seon Kim jin Bong Kim Tae Nyeun Kim Tae Hyeon Kim Tae Hyo Kim Jae Woo Kim Ji Kon Ryu Young-Soo Moon Jong Ho Moon Sung Jae Park Chan Guk Park Sung-Jo Bang Chang Heon Yang Kyo-Sang yoo Byung Moo yoo Kyu Taek Lee Dong Ki Lee Byung Seok Lee Sang Soo Lee Seung Ok Lee Woo jin Lee Chang Min Cho Young-Eun Joo Gab jin Cheon Young Woo Choi Jae Bok Chung Yong Bum yoon Department of Internal Medicine Catholic University of Daegu School of Medicine Daegu 705-718 South Korea Department of Internal Medicine Asan Medical Center University of Ulsan College of Medicine Seoul 138-736 South Korea Department of Medical Statistics Catholic University of Daegu School of Medicine Daegu 705-718 South Korea Department of Internal Medicine Pusan National University School of Medicine Busan 602-739 South Korea Department of Internal Medicine Korea University College of Medicine Seoul 136-705 South Korea Department of Internal Medicine Hallym University College of Medicine Chuncheon 200-704 South Korea Department of Internal Medicine Yeungnam University College of Medicine Daegu 705-717 South Korea Department of Internal Medicine Wonkwang University College of Medicine Iksan Jeonbuk 570-711 South Korea Department of Internal Medicine Gyeongsang National University School of Medicine Jinju Gyeongnam 660-702 South Korea Department of Internal Medicine Yonsei University Wonju College of Medicine Wonju Gangwon 220-701 South Korea Department of Internal Medicine Seoul National University College of Medicine Seoul 110-799 South Korea Department of Internal Medicine lnje University College of Medicine Seoul 139-713 South Korea Department of Internal Medicine Soonchunhyang University College of Medicine Bucheon Gyunggi 420-767 South Korea Department of Internal Medicine Inje University College of Medicine Busan 614-735 South Korea Department of Internal Medicine Chosun University College of Medicine Gwangju Jeonbuk 501-717 South Korea Department of Internal Medicine Ulsan University Hospital University of Ulsan College of Medicine Ulsan 681-714 South Korea Department of Internal Medicine Dongguk University College of Medicine Gyeongju Gyeongbuk 791-707 South Korea Department of Internal Medicine Hallym University College of Medicine Anyang Gyeonggi 431-070 South Korea Department of Internal Medicine Ajou University School of Medicine Suwon

AIM： To investigate prevalence of C/onorchis sinensis in patients with gastrointestinal symptoms, and the relation of the infection to hepatobiliary diseases in 26 hospitals in Korea. METHODS： Consecutive patients who had been admitted to the Division of Gastroenterology with gastrointestinal symptoms were enrolled from March to April 2005. Of those who had been diagnosed with clonorchiasis, epidemiology and correlation between infection and hepatobiliary diseases were surveyed by questionnaire. RESULTS： Of 3080 patients with gastrointestinal diseases, 396 （12.9%） had clonorchiasis and 1140 patients （37.2%） had a history of eating raw freshwater fish. Of those with a history of raw freshwater fish ingestion, 238 （20.9%） patients had clonorchiasis. Cholangiocarcinoma was more prevalent in C. sinensis-infected patients than nonnfected patients [34/396 （8.6%） vs 145/2684 （5.4%）, P = 0.015]. Cholangiocarcinoma and clonorchiasis showed statistically significant positive cross-relation （P = 0.008）. Choledocholithiasis, cholecystolithiasis, cholangitis, hepatocellular carcinoma, and biliary pancreatitis did not correlate with clonorchiasis. CONCLUSION： Infection rate of clonorchiasis was still high in patients with gastrointestinal diseases in Korea, and has not decreased very much during the last two decades. Cholangiocarcinoma was related to clonorchiasis, which suggested an etiological role for the parasite.

关键词： Clonorchis sinensis Epidemiology Cholangiocarcinoma Korea Multicenter study Clonorchiasis

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水坝的抗震设计准则与抗震性能评估

水坝的抗震设计准则与抗震性能评估

Human following of a mobile service robot with single laser range finder

水库大坝高质量建设与绿色发展——中国大坝工程学会2018学术年会

作者： jin-Kwon yoo Seon-Uk Kim Byung-Dong oh Seung In Yang 韩国水资源公社(K-water)业务维护部

地震引起的水坝损坏将对社会造成巨大损失。因此,应该进行大坝及相关附属设施的抗震性能评估和维护,以保护人民的生命和财产。在韩国,随着2017年修订的抗震设计准则的发布,水坝的抗震设计准则也在修订中,以反映修订的抗震设计准则的变... 详细信息

地震引起的水坝损坏将对社会造成巨大损失。因此,应该进行大坝及相关附属设施的抗震性能评估和维护,以保护人民的生命和财产。在韩国,随着2017年修订的抗震设计准则的发布,水坝的抗震设计准则也在修订中,以反映修订的抗震设计准则的变更。根据韩国水资源公社对水坝及其附属设施进行抗震性能评估的经验和结果,本文详细讨论了2011年发布的现行水坝的抗震设计准则存在的问题及后续的问题。此外,本文还介绍了韩国水资源公社经营的水坝及其附属设施的抗震性能评估现状。

关键词：抗震设计准则水坝设计准则抗震性能评估水坝设施

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Journal of Measurement Science and Instrumentation 2012年第1期3卷 94-98页

作者： yoon-chang SUNG Ho-yeon KIM yoon-kyu yoo Joo-young PARK Woo-jin CHUNG School of Mechanical Engineering Korea University

The human following becomes one of the significant procedure in human-friendly navigation of mobile *** potential applications of human-following technology are developed *** paper suggests a method for a mobile robot to detect human legs and to follow the human by using a single laser range finder(LRF).We extract four simple attributes of human *** employ a support vector data description(SVDD)scheme in order to define the boundary of extracted attributes *** deal with occlusion,we designed an efficient human walking model to have robust *** proposed approaches were successfully confirmed by carrying out various experiments.

关键词： mobile robot human following leg detection

Pb concentrations and isotopic compositions in the soil and sediments around the abandoned mine in southwest of Korea

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Journal of Agricultural Chemistry and Environment 2013年第4期2卷 101-108页

作者： Jong-Woo Choi Eun-jin yoo Jee-young Kim Jong-Yeon Hwang Khanghyun Lee Won-Seok Lee jin-Seok Han Kyu-Seung Lee Environmental Measurement & Analysis Center Department of Environmental Infrastructure Research National Institute of Envi- ronmental Research Incheon South Korea

This study was undertaken to investigate the influence of Pb contaminant dispersal from an abandoned mine. For the study, 23 samples of sediment and soil were collected around the abandoned mine located in southwest of Korea. Pb concentrations and isotope ratios of sediment samples were analyzed through ICP-OES (Optima 5300 DV, Perkin Elmer) and MC-ICP-MS (Plasma II, Nu), respectively. The sediment samples collected in the main stream from the mine entrance showed high Pb concentrations of 139 - 1079 mg/kg, while Pb concentrations of the other sites were 19 - 29 mg/kg. Pb isotope ratios of the main stream sediments were 2.4854 - 2.4883 for 208Pb/207Pb and 1.1693 - 1.1740 for 206Pb/207Pb. On the other hand, the Pb isotopic compositions of sediments collected from the other sites were clearly different from those of ore deposits. The Pb isotope ratios versus inverse concentrations plot showed high linear correlation between the main stream, the tributary stream and one of the downstream sites representing the two end member mixing system between these sites. According to the binary mixing equation, the relative contribution of Pb pollutants from the abandoned mine to the downstream area were approximately 33% - 36%.

关键词： Pb Isotope Ratios MC-ICP-MS Abandoned Mine Stream Sediment

Cell-type continuous electromagnetic radiation system generating millimeter waves for active denial system applications

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Defence Technology（防务技术） 2022年第10期18卷 1895-1913页

作者： Sun-Hong Min ohjoon Kwon Matlabjon Sattorov Seontae Kim In-Keun Baek Seunghyuk Park Ranjan Kumar Barik Anirban Bera Dongpyo Hong Seonmyeong Kim Bong Hwan Hong Chawon Park Sukhwal Ma Minho Kim Kyo Chul Lee Yong jin Lee Han Byul Kwon Young Joon yoo Sang yoon Park Gun-Sik Park Korea Institute of Radiological and Medical Sciences(KIRAMS) Seoul01812South Korea Institute for Basic Science Center for Axion and Precision Physics ResearchDaejeon34141South Korea Center for THz-Driven Biomedical Systems Department of Physics and AstronomyCollege of Natural SciencesSeoul National UniversitySeoul08826South Korea Center for Applied Electromagnetic Research Advanced Institute of Convergence TechnologySuwonGyeonggi-do16229South Korea R&D Department Seoul-TeracomInc.Suwon16229South Korea Mechatronics R&D Center Samsung Electronics Co.Ltd.Hwasung18448South Korea Hanwha Corporation Gumi730-030South Korea Council of Scientific and Industrial Research Central Electronics Engineering Research InstitutePilani333031India Home Economics Education/Biosystems and Biomedical Sciences Korea UniversitySeoul02841South Korea Current affiliation of Seontae Kim:Young IN ACE 1 F60Anyangcheondong-roDongan-guAnyang-siGyeonggi-do14042South Korea.

The cell-type continuous electromagnetic radiation system is a demonstration device capable of generating high-power millimeter electromagnetic waves of a specific wavelength and observing their effects on living *** irradiates a biological sample placed in a 30×30×50 cm^(3)cell with electromagnetic waves in the 3.15-mm-wavelength region(with an output of≥1 W)and analyzes the temperature change of the sample.A vacuum electronic device-based coupled-cavity backward-wave oscillator converts the electron energy of the electron beam into radiofrequency(RF)energy and radiates it to the target through an antenna,increasing the temperature through the absorption of RF energy in the *** system causes pain and ultimately reduces combat power.A cell-type continuous electromagnetic radiation system consisting of four parts—an electromagnetic-wave generator,a highvoltage power supply,a test cell,and a system controller—generates an RF signal of≥1 W in a continuous waveform at a 95-GHz center frequency,as well as a chemical solution with a dielectric constant similar to that of the skin of a living *** increase of 5°C lasting approximately 10 s was confirmed through an experiment.

关键词： Millimeter waves Terahertz waves Coupled-cavity backward wave oscillator(CCBWO) Cell-type continuous electromagnetic radiation Active denial system(ADS) Directed-energy weapon(DEW)

In vivo inhibitory effect of gaseous chlorine dioxide against infection of Rhizopus oryzaeonsweetpotato

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In vivo inhibitory effect of gaseous chlorine dioxide agains...