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Endoscopic ultrasound-guided tissue sampling induced pancreatic duct leak resolved by the placement of a pancreatic stent:A case report

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World Journal of Clinical Cases 2024年第9期12卷 1677-1684页

作者： ki-Hyun kim Chang hwan Park Eunae Cho Yohan Lee Department of Internal Medicine Chonnam National University HospitalGwangju 61469South Korea Department of Gastroenterology Chonnam National University HospitalGwangju 61469South Korea

BACKGROUND Pancreatic ductal leaks complicated by endoscopic ultrasonography-guided tissue sampling(EUS-TS)can manifest as acute *** SUMMARY A 63-year-old man presented with persistent abdominal pain and weight ***:Laboratory findings revealed elevated carbohydrate antigen 19-9(5920 U/mL)and carcinoembryonic antigen(23.7 ng/mL)*** resonance imaging of the pancreas revealed an approximately 3 cm ill-defined space-occupying lesion in the inferior aspect of the head,with severe encasement of the superior mesenteric *** ductal adenocarcinoma was confirmed after pathological examination of specimens obtained by EUS-TS using the fanning *** and outcomes:The following day,the patient experienced severe abdominal pain with high amylase(265 U/L)and lipase(1173 U/L)*** tomography of the abdomen revealed edematous wall thickening of the second portion of the duodenum with adjacent fluid collections and a suspicious leak from either the distal common bile duct or the main pancreatic duct in the *** retrograde cholangiopancreatography revealed dye leakage in the head of the main pancreatic ***,a 5F 7 cm linear plastic stent was deployed into the pancreatic duct to divert the pancreatic *** patient’s abdominal pain improved immediately after pancreatic stent insertion,and amylase and lipase levels normalized within a *** chemotherapy was then *** Using the fanning method in EUS-TS can inadvertently cause damage to the pancreatic duct and may lead to clinically significant *** a pancreatic stent may immediately resolve acute pancreatitis and shorten the waiting time for curative *** using the fanning method during EUSTS,ductal structures should be excluded to prevent pancreatic ductal leakage.

关键词： Endoscopic ultrasound-guided tissue sampling Pancreatitis Pancreatic duct leak Pancreatic stent Case report

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The Performance Improvement of BASK System for Giga-Bit MODEM Using the Fuzzy System

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International Journal of Communications, Network and System Sciences 2010年第5期3卷 441-445页

作者： ki-hwan eom Kyo-hwan Hyun Kyung-Kwon Jung 不详

In this paper we propose an automatic bandwidth control method for the performance improvement of Binary Amplitude Shift Keying (BASK) system for Giga-bit Modem in millimeter band. To improve the performance of the BASK system with a fixed bandwidth, the proposed method is to adjust a bandwidth of low pass filter in receiver using the fuzzy system. The BASK system consists of a high speed shutter of the transmitter and a counter and a repeater of receiver. The repeater consists of four stage converters, and a converter is constructed with a low pass filter and a limiter. The inputs to the fuzzy system are the reminder and integral of remainder of counter, and output is a bandwidth. We used a Viterbi algorithm to find the optimum detection from output of the counter. Simulation results show that the proposed system improves the performance compared to the fixed bandwidth.

关键词： BASK Giga-Bit MODEM Bandwidth Low Pass Filter Fuzzy System

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The SARS-CoV-2 spike protein induces lung cancer migration and invasion in a TLR2-dependent manner

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Cancer Communications 2024年第2期44卷 273-277页

作者： Mi-Jeong kim Ji Young kim Ji Hye Shin Juhee Son Yeeun Kang Soo-Kyung Jeong Duk-hwan kim Kyun-hwan kim Eunyoung Chun ki-Young Lee Department of Immunology Samsung Biomedical Research InstituteSungkyunkwan University School of MedicineSuwonRepublic of Korea Research and Development Center CHA Vaccine InstituteSeongnam-siRepublic of Korea Department of Molecular Cell Biology Sungkyunkwan University School of MedicineSuwonRepublic of Korea Department of Precision Medicine Sungkyunkwan University School of MedicineSuwonRepublic of Korea Department of Health Sciences and Technology Samsung Advanced Institute for Health Sciences&TechnologySamsung Medical CenterSungkyunkwan UniversitySeoulRepublic of Korea

Dear editor,Severe acute respiratory syndrome coronavirus2(SARS-CoV-2)infection can lead to severe outcomes in patients with cancer[1].It has been reported that patients with lung cancers disproportionately manifest severe COVID-19 with a high rate of hospitalization and death[2].Notably,the SARS-CoV-2 Spike(S)protein can induce hyper-inflammation in both epithelial cells and macrophages through toll-like receptor(TLR)1/TLR2 or TLR2/6-dependent nuclear factor-kappaB(NF-κB)path-way[3].However,molecular and cellular evidence on whether the SARS-CoV-2 virus affects the severity of lung cancer patients through TLR1/2 or TLR2/6 signaling remains unclear.

关键词： lung TLR2 invasion

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氮掺杂对环境空气中TiO_(2)纳米催化剂抗甲醛光催化矿化的影响

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Chinese Journal of Catalysis 2024年第4期59卷 303-323页

作者： Dae-hwan Lim Aadil Bathla Hassan Anwer Sherif AYounis Danil WBoukhvalov ki-Hyun kim 汉阳大学土木与环境工程系韩国首尔国立科技大学环境工程系巴基斯坦伊斯兰堡埃及石油研究所分析与评估部埃及开罗南京林业大学材料物理与化学研究所理学院江苏南京乌拉尔联邦大学物理与技术研究所俄罗斯叶卡捷琳堡

通过氮掺杂TiO_(2)(N-TiO_(2))浸渍蜂窝过滤器构建了一系列原型光催化空气净化器(AP(N_(x)-C_(y)))系统,并用于在UV-LED光(1 W)照射条件下光催化分解0.5-5 ppm甲醛(CH_(2)O)蒸汽.在上述催化过滤器系统中,Nx和Cy分别代表N/Ti摩尔比(0-20)... 详细信息

通过氮掺杂TiO_(2)(N-TiO_(2))浸渍蜂窝过滤器构建了一系列原型光催化空气净化器(AP(N_(x)-C_(y)))系统,并用于在UV-LED光(1 W)照射条件下光催化分解0.5-5 ppm甲醛(CH_(2)O)蒸汽.在上述催化过滤器系统中,Nx和Cy分别代表N/Ti摩尔比(0-20)和N-TiO_(2)浓度(2-20 mg mL^(-1)).光催化分解实验结果表明,AP(N_(10)-C_(10))的性能最好,其催化CH2O转化为CO_(2)的转化率最高,循环反应10次后CO_(2)产率仍达到89.2%,在干燥空气中的清洁空气输送速率为9.45 L min^(-1).N10-C10的电荷载流子寿命(τa:1.70 ns)优于其他样品(如纯TiO_(2)的电荷载流子寿命为1.37 ns),这表明N缺陷(No)有助于降低带隙(3.10 eV)和产生氧空位OVs-Ti^(3+),这与密度泛函理论(DFT)模拟结果一致.采用原位漫反射红外傅里叶变换、电子顺磁共振和DFT分析等多种方法研究了CH_(2)O的光催化氧化途径.结果表明,氧化过程涉及多个能量有利的中间步骤(例如CH2O以CH_(2)O_(2)的形式在TiO_(2)-OV{110}表面的桥连O/OH基团上发生放热共价吸附,随后通过催化脱氢/氧化反应直接生成CO_(2):CH_(2)O_(2)/HCOO^(-)+•OH→H_(2)O+CO_(2)).这些步骤与具有N杂质的{101}表面上化学活性Ti原子的态密度计算结果一致.预计No缺陷和OVs的存在将通过降低活化能垒来影响反应能量和中间产物,从而在加湿条件下实现有效的矿化.综上,本文为设计和构建先进的光催化系统,并用于环境空气中醛类挥发性有机物(VOCs)的有效矿化提供了新思路.

关键词：光催化蜂窝过滤器甲醛氮掺杂TiO_(2) 密度泛函理论计算催化反应途径空气净化

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Wireless Nurse Call System

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通讯和计算机（中英文版） 2010年第5期7卷 36-40页

作者： ki hwan eom Jung Yeon Choi Min Sup Park Department of Electronic Engineering Dongguk University Seoul 100-715 Korea Young Woo System Seoul 100-715 Korea

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Automated X-ray Defect Inspection on Occluded BGA Balls Using Hybrid Algorithm

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Computers, Materials & Continua 2023年第6期75卷 6337-6350页

作者： ki-Yeol eom Byungseok Min Department of AI Bigdata Suseong UniversityDaegu42078Korea R&D Center XAVIS Co.Ltd.Seongnam-si13202Korea

Automated X-ray defect inspection of occluded objects has been an essential topic in semiconductors,autonomous vehicles,and artificial intelligence ***,there are few solutions to segment occluded objects in the X-ray inspection *** particular,in the Ball Grid Array inspection of X-ray images,it is difficult to accurately segment the regions of occluded solder balls and detect defects inside solder *** this paper,we present a novel automatic inspection algorithm that segments solder balls,and detects defects fast and efficiently when solder balls are *** proposed algorithm consists of two *** the first stage,the defective candidates or defects are determined through the following four steps:(i)image preprocessing such as noise removal,contrast enhancement,binarization,connected component,and morphology,(ii)limiting the inspec-tion area to the ball regions and determining if the ball regions are occluded,(iii)segmenting each ball region into one or more regions with similar gray values,and(iv)determining whether there are defects or defective candidates in the regions using a weighted sum of local threshold on local *** there are defective candidates,the determination of defects is finally made in the following *** the second stage,defects are detected using the automated inspection technique based on oblique computed *** 3D precision inspection process is divided into four steps:(i)obtaining 360 projection images(one image per degree)rotating the object from 0 to 360 degrees,(ii)reconstructing a 3D image from the 360 projected images,(iii)finding the center slice of gravity for solder balls from the axial slice images in the z-direction,and getting the inspection intervals between the upper bound and the lower bound from the center slice,and(iv)finally determining whether there are defects in the averaged image of solder *** proposed hybrid algorithm is robust for segmenting the defects inside o

关键词： Hybrid voids BGA X-ray inspection defects

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Effect of preparation method of noble metal supported catalyts on formaldehyde oxidation at room temperature: Gas or liquid phase reduction

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Journal of Environmental Sciences 2022年第12期34卷 201-216页

作者： Younghee Jang Ye hwan Lee Hanki eom Sang Moon Lee Sung Su kim Department of Environmental Energy Envineering Graduate School of kyonggi UniversityGyeonggi-do 16227Korea Department of Environmental Energy Engineeing Kyonggi UniversityGyonggi-do 16227Korea

Formaldehyde(HCHO) is toxic to the human body and is one of the main threats to the indoor air quality(IAQ). As such, the removal of HCHO is imperative to improving the IAQ,whereby the most useful method to effectively remove HCHO at room temperature is catalytic oxidation. This review discusses catalysts for HCHO room-temperature oxidation,which are categorized according to their preparation methods, i.e., gas-phase reduction and liquid-phase reduction methods. The HCHO oxidation performances, structural features,and reaction mechanisms of the different catalysts are discussed, and directions for future research on catalytic oxidation are reviewed.

关键词： Formaldehyde Indoor air quality Catalyst Prepared method

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Management of post-liver transplantation biliary stricture inaccessible by endoscopic retrograde cholangiopancreatography:A case report

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World Journal of Clinical Cases 2023年第34期11卷 8235-8241页

作者： Yohan Lee Chang hwan Park Eunae Cho ki-Hyun kim Division of Gastroenterology and Hepatology Department of Internal MedicineChonnam National University HospitalGwangju 61469South Korea

BACKGROUND One challenging scenario in the treatment of biliary stricture is that post-liver transplantation(LT)biliary strictures cannot be accessed using endoscopic retrograde cholangiopancreatography(ERCP).Here,we report such a case that was successfully treated using a novel endoscopic *** SUMMARY A 60-year-old man presented with obstructive jaundice caused by a post-LT biliary *** underwent LT for compensated alcoholic liver cirrhosis and hepatocellular *** investigations unveiled a cholestatic pattern of abnormalities in liver function and a total bilirubin level of 16 mg/*** resonance cholangiopancreatography revealed a stricture extending from the right intrahepatic bile duct into the common hepatic *** postoperative deformities made accessing the ampulla of Vater with a sideviewing duodenoscope *** transhepatic biliary drainage(PTBD)was performed to treat biliary ***,to resolve the stricture completely,a fully covered self-expandable metal stent(FC-SEMS)with a novel proximal retrievable string was deployed into the post-LT biliary stricture through the PTBD *** inserting the stent through the PTBD tract,the stent with the distal string was manually inverted to ensure that the distal part with the string became the proximal part for later endoscopic *** 6 mo,the FC-SEMS was successfully removed without complications,as the string was pulled out using a forward-viewing *** Deployment and endoscopic removal of an FC-SEMS with a novel proximal string through the PTBD tract may be a viable option for treating post-LT biliary strictures that are inaccessible by ERCP.

关键词： Jaundice Obstructive Percutaneous transhepatic cholangioscopy Self-expandable metallic stents Case report

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Formation of photo-reactive heterostructure from a multicomponent amorphous alloy with atomically random distribution

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Journal of Materials Science & Technology 2022年第14期109卷 245-253页

作者： Hae Jin Park Hee Jin Lee Tae Kyung kim Sung hwan Hong Wei-Min Wang Taek Jib Choi ki Buem kim Department of Nanotechnology and Advanced Materials Engineering Sejong University209 Neung dong-roGwangjin-guSeoul 05006Republic of Korea Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of EducationShandong UniversityJinan 250061China

In this study,metallic glass is designed tunable for promising functional applications via a facile and stable,one-step *** approach about alloy design and process is based on the unique properties of the Ti-Cu-Ni-Sn metallic glass that are afforded by the varying oxygen affinities of the four constituent *** metallic glass exhibits homogeneous nucleation of oxides and uniform formation of the various metal *** alloy design and hydrothermal synthesis to customize the metallic glasses are the most critical factors that determine the characteristics of the metal oxides and the resulting nanostructures and photoelectrode *** enables the desired element to be selectively grown via a facile single-step *** results provide a promising road map for the application of metallic glasses to photoelectrochemical(PEC)solar water splitting,as well as various other new possibilities.

关键词： Metallic glass Alloy design Hydrothermal synthesis Metal oxide Water splitting

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Incidence and Related Risk Factors of Junctional Ectopic Tachycardia in Infants after Cardiac Surgery for Congenital Heart Disease

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Congenital Heart Disease 2022年第5期17卷 569-578页

作者： Jae Hee Seol Se Yong Jung Jae Young Choi Han ki Park Young hwan Park Nam Kyun kim Department of Pediatrics Congenital Heart Disease CenterDivision of Pediatric CardiologySeverance Cardiovascular HospitalYonsei University College of MedicineSeoulKorea Department of Pediatrics Yonsei University Wonju College of MedicineWonjuKorea Department of Thoracic and Cardiovascular Surgery Division of Cardiovascular SurgeryCongenital Heart Disease CenterSeverance Cardiovascular HospitalYonsei University College of MedicineSeoulKorea Department of Pediatrics and Biomedical Engineering School of MedicineEmory UniversityAtlantaUSA

Objective:Junctional ectopic tachycardia is common after cardiac surgery for congenital heart ***,its incidence and related risk factors in infants after cardiac surgery are not well *** objective of this study was to determine the overall incidence and related risk factors for junctional ectopic tachycardia in neonates and ***:We enrolled a total of 271 patients aged<1 year who underwent open cardiac surgery at Severance Cardiovascular Hospital from January 2018 to December *** criteria were immediate postoperative mortality,other arrhythmias detected in the perioperative period,and ***:The overall incidence of junctional ectopic tachycardia was 12.9%.The logistic regression analysis revealed that longer cardiopulmonary bypass time,surgery involving atrioventricular node stretching,and the presence of early repolarization on preoperative electrocardiography increased the risk of junctional ectopic *** with junctional ectopic tachycardia had longer intubation time and intensive care unit ***:Junctional ectopic tachycardia is a common arrhythmia after cardiac surgery for congenital heart disease in ***,infants developing junctional ectopic tachycardia after cardiac surgery have specific preoperative electrocardiography *** risk factors for junctional ectopic tachycardia were associated not only with surgical procedural factors but also with preoperative electrocardiographic parameters.

关键词： Junctional ectopic tachycardia congenital heart disease early re-polarization

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