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Technical issues and new devices of ESD of early gastric cancer

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World Journal of Gastroenterology 2011年第31期17卷 3585-3590页

作者： Wan sik Lee Jin Woong Cho Young Dae kim Kyu Jong kim Byung Ik Jang Division of Gastroenterology Department of Internal MedicineChonnam University Medical School Division of Gastroenterology and Hepatology Department of Internal MedicinePresbyterian Medical Center Division of Gastroenterology and Hepatology Department of Internal MedicineSchool of MedicineChosun University Division of Gastroenterology Department of Internal MedicineKosin University College of Medicine Division of Gastroenterology Department of Internal MedicineYeungnam University College of Medicine

Endoscopic submucosal dissection(ESD) is a highly refined technique compared to conventional endoscopic mucosal *** enables complete resection of early gastric cancer(EGC) which has no possibility of lymph node *** for ESD of EGC generally entails early gastric cancer confined to the mucosa with well differentiated histology,though there are clinically suitable expanded *** ESD requires specific skill and expertise,endoscopists need to be familiarized with basic methods and the use of special *** essence of the technique is to dissect the submucosal layer with direct vision and maintain thecutting plane above the underlying proper muscle *** there are some differences in the detailed technical aspect,the cardinal method of ESD is now well established and ***,research and development of new ESD devices that render more efficient,safe ESD are still in progress to improve the overall result of ESD on early gastric cancer.

关键词： Endoscopic submucosal dissection Technique Device Early gastric cancer

Application and evaluation of a pattern-based building energy model calibration method using public building datasets

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Building Simulation 2022年第8期15卷 1385-1400页

作者： Kaiyu sun Tianzhen Hong Janghyun kim Barry Hooper Lawrence Berkeley National Laboratory BerkeleyCAUSA National Renewable Energy Laboratory GoldenCOUSA San Francisco Deportment of the Environment San FranciscoCAUSA

Building performance simulation has been adopted to support decision making in the building life *** essential issue is to ensure a building energy simulation model can capture the reality and complexity of buildings and their systems in both the static characteristics and dynamic *** energy model calibration is a technique that takes various types of measured performance data(e.g.,energy use)and tunes key model parameters to match the simulated results with the actual *** study performed an application and evaluation of an automated pattern-based calibration method on commercial building models that were generated based on characteristics of real buildings.A public building dataset that includes high-level building attributes(e.g.,building type,vintage,total floor area,number of stories,zip code)of 111 buildings in San Francisco,California,USA,was used to generate building models in *** level energy use calibrations were then conducted by comparing building model results against the actual buildings’monthly electricity and natural gas *** results showed 57 out of 111 buildings were successfully calibrated against actual buildings,while the remaining buildings showed opportunities for future calibration *** to the pattern-based model calibration method are identified to expand its use for:(1)central heating,ventilation and air conditioning(HVAC)systems with chillers,(2)space heating and hot water heating with electricity sources,(3)mixed-use building types,and(4)partially occupied buildings.

关键词： model calibration building energy modeling EnergyPlus building performance simulation monthly energy use

Synthesis and characterization of Ba(Co_xNb_(1-x))O_3 nanoparticles by hydrothermal processing

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中国有色金属学会会刊：英文版 2009年第B9期19卷 92-95页

作者： Hyun-Ju kim Min-Cheol CHU Seong-Jai CHO Dong-sik BAE School of Nano & Advanced Materials Engineering Changwon National University Materials Evaluation Center Korea Research Institute of Standards and Science

The nanosized Ba(CoxNb1-x)O3(BCN) particles were prepared under high temperature and pressure conditions by precipitation from metal nitrates with aqueous potassium hydroxide. Ba(CoxNb1-x)O3 powders were obtained in the temperature range of 170-210 ℃ for 6 h. The results show that the average size of the synthesized particles increases with increasing reaction temperature. The average size of the synthesized particles is about 10 nm. The crystalline phase of the synthesized particles is found to be Ba(CoxNb1-x)O3. Ceramics derived from the nano BCN powders could achieve high sintering density at a relatively low sintering temperature.

关键词：纳米粒子合成臭氧热加工表征平均粒径烧结温度氢氧化钾

Cost-effective screening using a two-antibody panel for detecting mismatch repair deficiency in sporadic colorectal cancer

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World Journal of Clinical Cases 2021年第24期9卷 6999-7008页

作者： Jong Beom kim Young Il kim Yong sik Yoon Jihun kim Seo Young Park Jong Lyul Lee Chan Wook kim In Ja Park Seok-Byung Lim Chang sik Yu Jin Cheon kim Division of Colon and Rectal Surgery University of Ulsan College of MedicineAsan Medical CenterSeoul 05505South Korea Department of Pathology University of Ulsan College of MedicineAsan Medical CenterSeoul 05505South Korea Department of Clinical Epidemiology and Biostatistics University of Ulsan College of MedicineAsan Medical CenterSeoul 05505South Korea

BACKGROUND The microsatellite instability(MSI)test and immunohistochemistry(IHC)are widely used to screen DNA mismatch repair(MMR)deficiency in sporadic colorectal cancer(CRC).For IHC,a two-antibody panel of MLH1 and MSH2 or four-antibody panel of MLH1,MSH2,PMS2,and MSH6 are *** general,MSI is known as a more accurate screening test than *** To compare two-and four-antibody panels of IHC in terms of accuracy and cost benefit on the basis of MSI testing for detecting MMR *** We retrospectively analyzed patients with CRC who underwent curative surgery between 2015 and 2017 at a tertiary referral *** IHC with four antibodies and MSI tests were routinely *** sensitivity and specificity of a fourand two types of two-antibody panels(PMS2/MSH6 and MLH1/MSH2)were compared on the basis of MSI testing for detecting MMR *** High-frequency MSI was found in 5.5%(n=193)of the patients(n=3486).The sensitivities of the four-and two types of two-antibody panels were 97.4%,92.2%,and 87.6%,*** specificities of the three types of panels did not differ significantly(99.6%for the four-antibody and PMS2/MSH6 panels,99.7%for the MLH1/MSH2 panel).Based on Cohen's kappa statistic(κ),four-and twoantibody panels were in almost perfect agreement with the MSI test(κ>0.9).The costs of the MSI test and the four-and two-antibody panels of IHC were approximately$200,$160,and$80,*** Considering the cost of the four-antibody panel IHC compared to that of the twoantibody panel IHC,a two-antibody panel of PMS2/MSH6 might be the best choice in terms of balancing cost-effectiveness and accuracy.

关键词： Adenocarcinoma DNA mismatch repair Immunochemistry Monoclonal antibody Microsatellite instability Cost-effectiveness

Clinicopathological features of familial adenomatous polyposis in Korean patients

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World Journal of Gastroenterology 2016年第17期22卷 4380-4388页

作者： sung Min Jung Yong sik Yoon Seok-Byeong Lim Chang sik Yu Jin Cheon kim Division of Colon and Rectal Surgery Department of Surgery University of Ulsan College of Medicine Seoul 05505 South Korea Asan Medical Center Seoul 05505 South Korea

AIM: To identify prognostic factors and to correlate APC mutations with clinical features, including extracolic manifestations. METHODS: One hundred thirty-five patients who underwent surgical procedures for familial adenomatous polyposis(FAP) were included. FAP was diagnosed when the number of adenomatous polyps was > 100. Data related to patient, extracoloic manifestations, cancer characteristics, operative procedure, follow up and surveillance were collected. APC mutation testing was performed in the 30 most recent patients. DNA was extracted from peripheral blood and polymerase chain reaction products using 31 primer pairs on APC gene were sequenced. A retrospective study was performed to investigate a causal relationship between prognosis and feature of ***: The mean age of the 51 patients with colorectal cancer(CRC) was older than that of those without CRC(30.5 vs 36.9, P = 0.002). Older individuals were more likely to have colon cancer at the time of FAP diagnosis [odds ratio, 4.75(95%CI: 1.71-13.89) and 5.91(1.76-22.12) for 40-49 years and age > 50 vs age < 30). The number of confirmed deaths was 13 and the median age at death was 40 years(range, 27 to 85 years). Ten of the deaths(76.9%) were from CRC. Another cause of two cases of death were desmoid tumors(15.4%). Development of cancer on remnant rectal or ileal mucosa after surgery was not observed. The APC mutation testing revealed 23 pathogenic mutations and one likely pathogenic mutation, among which were four novel mutations. The correlation between mutational status and clinical manifestations was investigated. Mutations that could prodict poor prognosis were at codon 1309 which located on mutation cluster region, codon 1465 and codon ***: Identification of APC mutations should aid in the diagnosis and counseling of family members in terms of early diagnosis and management of FAP.

关键词： Adenomatous polyposis coli Colorectal neoplasms APC gene Prognosis Survival

Synergistic passivation of MAPbI_(3) perovskite solar cells by compositional engineering using acetamidinium bromide additives

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Journal of Energy Chemistry 2021年第8期30卷 755-762,I0016页

作者： Kyungeun Jung Weon-sik Chae Jae Won Choi Ki Chul kim Man-Jong Lee Department of Chemistry Konkuk University143-701 SeoulSouth Korea Department of Advanced Technology Fusion Konkuk University143-701 SeoulSouth Korea Analysis Research Division Daegu CenterKorea Basic Science Institute702-701 DaeguSouth Korea Division of Chemical Engineering Konkuk University05029 SeoulSouth Korea

For the global commercialization of highly efficient and stable perovskite solar cells(PSCs),it is necessary to effectively suppress the formation of various defects acting as nonradiative recombination sources in perovskite light-harvesting *** defects between the charge-selective layer and the perovskite are easily formed in the solution process used to fabricate perovskite *** addition,owing to the difference in thermal expansion coefficients between the substrate and the perovskite film,internal residual tensile stress inevitably occurs,resulting in increased nonradiative ***,a simple compositional engineering scheme for realizing efficient and stable PSCs,which incorporates acetamidinium bromide(AABr)as an additive into the MAPbI_(3) lattice,is *** an additive,AABr has been found to provide synergistic multiple passivation for both internal and interfacial *** was found to effectively release the tensile strain of the MAPbI_(3) film by forming a structure stabilized by NH-I hydrogen bonds,as evidenced by calculations based on density functional theory(DFT).Furthermore,the incorporated AABr additives created a charge carrier recombination barrier to enhance charge collection capability by reducing interfacial ***,a power conversion efficiency(PCE)of 20.18%was achieved using a planar device employing AABr-incorporated MAPbI_(3).This was substantially higher than the 18.32% PCE of a pristine MAPbI_(3)-based ***,unencapsulated PSCs using AABr-incorporated MAPbI_(3) absorbers exhibited excellent long-term stability,maintaining>95% of initial PCE up to 1200 hours in ambient air.

关键词： Acetamidinium bromide Planar perovskite solar cell Tensile stress Interface passivation Recombination barrier

SOME RESULTS ON GENERALIZED EQUILIBRIUM PROBLEMS INVOLVING STRICTLY PSEUDOCONTRACTIVE MAPPINGS

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Acta Mathematica Scientia 2011年第5期31卷 2041-2057页

作者： Jong Kyu kim sun Young Cho Department of Mathematics Educations Kyungnam UniversityMasan 631-701Korea Department of Mathematics Gyeongsang National UniversityChinju 660-701Korea

In this paper,we consider an iterative sequence for generalized equilibrium problems and strictly pseudocontractive *** show that the iterative sequence converges strongly to a common element of the solution set of ge... 详细信息

关键词： equilibrium problem nonexpansive mapping inverse-strongly monotone mapping strictly pseudocontractive mapping

A Rapid Adaptation Approach for Dynamic Air‑Writing Recognition Using Wearable Wristbands with Self‑Supervised Contrastive Learning

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Nano-Micro Letters 2025年第2期17卷 417-431页

作者： Yunjian Guo Kunpeng Li Wei Yue Nam‑Young kim Yang Li Guozhen Shen Jong‑Chul Lee Department of Electronic Convergence Engineering Kwangwoon UniversitySeoul 01897South Korea Radio Frequency Integrated Circuit(RFIC)Bio Centre Kwangwoon UniversitySeoul 01897South Korea Department of Electronic Engineering Kwangwoon UniversitySeoul 01897South Korea School of Microelectronics Shandong UniversityJinan 250101People’s Republic of China State Key Laboratory of Integrated Chips and Systems Fudan UniversityShanghai 200433People’s Republic of China School of Integrated Circuits and Electronics Beijing Institute of TechnologyBeijing 100081People’s Republic of China

Wearable wristband systems leverage deep learning to revolutionize hand gesture recognition in daily *** existing approaches that often focus on static gestures and require extensive labeled data,the proposed wearable wristband with selfsupervised contrastive learning excels at dynamic motion tracking and adapts rapidly across multiple *** features a four-channel sensing array composed of an ionic hydrogel with hierarchical microcone structures and ultrathin flexible electrodes,resulting in high-sensitivity capacitance *** wireless transmission from a Wi-Fi module,the proposed algorithm learns latent features from the unlabeled signals of random wrist ***,only few-shot labeled data are sufficient for fine-tuning the model,enabling rapid adaptation to various *** system achieves a high accuracy of 94.9%in different scenarios,including the prediction of eight-direction commands,and air-writing of all numbers and *** proposed method facilitates smooth transitions between multiple tasks without the need for modifying the structure or undergoing extensive task-specific *** utility has been further extended to enhance human–machine interaction over digital platforms,such as game controls,calculators,and three-language login systems,offering users a natural and intuitive way of communication.

关键词： Wearable wristband Self-supervised contrastive learning Dynamic gesture Air-writing Human-machine interaction

Effect of vehicle weight on natural frequencies of bridges measured from traffic-induced vibration

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Earthquake Engineering and Engineering Vibration 2003年第1期2卷 109-116页

作者： Chul-Young kim Dae-sung Jung Nam-sik kim Soon-Duck Kwon Maria Q.Feng Dept.of Civil & Envir.Eng. Myongji UniversityKorea Professor Dept.of Civil & Envir.Eng. Myongji UniversityKorea Research Associate Hyundai Institute of Construction Technology Hyundai E&C Co.Ltd.Korea Chief Researcher Dept.of Civil Engineering Chonbuk National UniversityKorea Professor Dept.of Civil & Envir.Eng. University of CaliforniaIrvineCaliforniaUSA Professor

Recently,ambient vibration test(AVT)is widely used tu estimate dynamic characteristics of large civil struc- *** characteristics ean be affected by various envirnnmental factors such as humidity,intensity of wind,and *** these environmental conditions,tire mass of vehicles may change the measured valnes when traffic-in- duced vibration is used as a source of AVT tor *** effect of vehicle mass on dynamic characteristics is investigated through traffic-induced vibration tests on three bridges;(1)three-span suspension bridge(128m+404m+128m),(2) five-span continuous steel box girder bridge(59m+3@ 95m+59m),(3)simply supported plate girder bridge(46m). Acceleration histories of each measurement location under normal traffic are recorded for 30 minutes at *** recor- ded histories are divided into individual vibrations and are combined into two groups aceording to the level of vibration;one by heavy vehicles such as trucks and buses and the other by light vehicles such as passenger *** processing of the two groups of signals shows that,for the middle and long-span bridges,the difference can be hardly detected,but,for the short span bridges whose mass is relatively small,the measured natural frequencies can change up to 5.4%.

关键词： ambient vibration test traffic induced vibration vehicle mass suspension bridge short-span bridge dynamic characteristics natural frequency