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Usefulness of artificial intelligence in gastric neoplasms

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World Journal of Gastroenterology 2021年第24期27卷 3543-3555页

作者： Ji hyun Kim seung-Joo Nam Sung Chul Park Division of Gastroenterology and Hepatology Department of Internal MedicineKangwon National University School of MedicineChuncheon 24289Kangwon DoSouth Korea

Recently,studies in many medical fields have reported that image analysis based on artificial intelligence(AI)can be used to analyze structures or features that are difficult to identify with human *** diagnose early gastric cancer,related efforts such as narrow-band imaging technology are ***,diagnosis is often ***,a diagnostic method based on AI for endoscopic imaging was developed and its effectiveness was confirmed in many *** gastric cancer diagnostic program based on AI showed relatively high diagnostic accuracy and could differentially diagnose non-neoplastic lesions including benign gastric ulcers and *** AI system has also been developed that helps to predict the invasion depth of gastric cancer through endoscopic images and observe the stomach during endoscopy without blind ***,if AI is used in the field of endoscopy,it is expected to aid in the diagnosis of gastric neoplasms and determine the application of endoscopic therapy by predicting the invasion depth.

关键词： Artificial intelligence Convolutional neural network Gastric neoplasm Esophagogastroduodenoscopy Diagnosis Invasion depth

Effect of High-Performance Steel on the Tension Stiffening and Cracking Behavior of Reinforced Concrete (RC) Tension Ties

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Journal of Iron and Steel Research International 2011年第S1期18卷 812-816页

作者： Yun hyun-do Lee Young-oh Ryu seung-hyun Seo Soo-yeon Department of Architectural Engineering Chungnam National University Daejeon 305764 South Korea Department of Architectural Engineering Chungju National University Chungju South Korea

In construction industry, the application of high-performance reinforcement bar is required strongly. Unfortunately, not nearly enough research has been conducted on high-performance steel in comparison with high strength concrete. This paper describes the effect of high-performance steel as reinforcement steel bar on the tension response and cracking behavior of concrete and fiber-reinforced strain-hardening cement-based composite (SHCC) tension members. High-performance steel is characterized by higher strength in comparison to ASTM A615-06 Grade 60 steel. The tension stiffening effect on high-performance reinforcing bars embedded in cement-based composite prism is investigated experimentally. The variables in the study are types of cement-based composite (conventional concrete, synthetic fiber-reinforced cement composite), yielding strength of steel bars (400MPa and 600MPa), and types of loading (monotonic and repeated tension loading).

关键词： crack width tension stiffening fiber-reinforced strain-hardening cement-based composite tension

Semantics-oriented approach for information interoperability and governance:towards user-centric enterprise architecture management

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Journal of Zhejiang University-Science C(Computers and Electronics) 2010年第4期11卷 227-240页

作者： Imran GhanI Choon Yeul LEE Sung hyun JUHN seung Ryul JEONG School of Business IT Kookmin University

Enterprise architecture (EA) efforts focus on business, technology, data, and application architecture, and their integration. However, less attention has been given to one of the most critical EA elements, i.e., users (EA audiences). As a result, existing EA management systems (EAMS) have become old, large, content-centric document-repositories that are unable to provide meaningful information of use to the enterprise users and aligned with their needs and functional scope. We argue that a semantic technology based mechanism focusing on enterprise information and user-centricity has the potential to solve this problem. In this context, we present a novel ontology-based strategy named the user-centric semantics-oriented EA (U-SEA) model. Based on this model, we have developed a user-centric semantics-oriented enterprise architecture management (U-SEAM) system. Our approach is generic enough to be used in a wide variety of user-centric EAM applications. The results obtained show computational feasibility to integrate and govern enterprise information and to reduce complexity with respect to interoperability between enterprise information and users.

关键词： Enterprise architecture management system (EAMS) Ontology Recommender system User-centric Semantic Web Framework

Vertical graphene on flexible substrate,overcoming limits of crack-based resistive strain sensors

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npj Flexible Electronics 2022年第1期6卷 28-35页

作者： Hong Ryeol Na hyun Joo Lee Jae Ho Jeon han-Jin Kim Sahng-Kyoon Jerng Sanjib Baran Roy seung-hyun Chun Sunghun Lee Yong Ju Yun Department of Physics and Astronomy Sejong UniversitySeoul 05006Korea Graduate School of Energy and Environment(KU-KIST Green School) Korea UniversitySeoul 02841Korea Center for Energy Materials Research Korea Institute of Science and TechnologySeoul 02792Korea Graphene Research Institute Sejong UniversitySeoul 05006Korea

Resistive strain sensors(RSS)with ultrasensitivity have attracted much attention as multifunctional ***,since most ultrasensitive RSS are designed by cracked conductive metals,the sensing performance is severely degraded due to accumulated structural deformation with consecutive *** overcome such limitation,newly designed structures have been suggested,but the development of mechanosensors exhibiting superior stability and ultrasensitivity still remains a ***,we demonstrate that vertical graphene(VG)RSS with high sensitivity(gauge factor greater than 5000),remarkable durability(>10,000 cycles),and extraordinary resilience can serve multifunctional *** find that well-defined cracks on tufted network structure result in highly reversible resistance variation,especially revivable status even after broken current path,confirmed by microscopic in situ *** VG integrated with a wireless sensing system exhibits excellent timbre recognition *** findings provide inspirable insights for mechanosensing system,making VG a promising component for future practicable flexible sensor technologies.

关键词： strain durability Vertical

Effect of SiC particles on microstructure and mechanical property of friction stir processed AA6061-T4

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中国有色金属学会会刊：英文版 2012年第S3期22卷 614-618页

作者： Don-hyun CHOI Yong-Il KIM DAE-Up KIM seung-Boo JUNG School of Advanced Materials Science and Engineering Sungkyunkwan University MEPL Sungkyunkwan University KITECH 838-11Palbok-dong 2-gaDeokjin-guJeonju-cityJeollabuk-do 561-844Korea

Friction stir processing of AA6061-T4 alloy with SiC particles was successfully carried *** particles were uniformly dispersed into an AA6061-T4 *** SiC particles promoted the grain refinement of the AA6061-T4 matrix by *** mean grain size of the stir zone (SZ) with the SiC particles was obviously smaller than that of the stir zone without the SiC *** microhardness of the SZ with the SiC particles reached about HV80 due to the grain refinement and the distribution of the SiC particles.

关键词： friction stir processing AA6061-T4 SiC particles pinning effect

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

Fabrication of SiC_p/AA5083 composite via friction stir welding

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中国有色金属学会会刊：英文版 2012年第S3期22卷 634-638页

作者： Byung-Wook AHN Don-hyun CHOI Yong-Hwan KIM seung-Boo JUNG School of Advanced Materials Science and Engineering Sungkyunkwan University

Microstructure and mechanical properties of SiCp /AA5083 composite fabricated by friction stir welding (FSW) were *** influence of the number of FSW passes on the distribution of SiC particles and mechanical properties in the joint was *** one pass,the SiC particles were entangled in the upper side of the stir zone (SZ).However,the particle distribution became more uniform after two passes due to the repeated stirring of the *** the SiC particles facilitate the grain refinement in the SZ by the pinning effect,the particle including region has much smaller grain size than the SZ without SiC *** SiCp /AA5083 composite region exhibits a Vickers hardness of HV90,which is much higher than the value of HV80 in the SZ produced by FSW without SiC particles.

关键词： metal matrix composite SiC particle friction stir welding mechanical property

Acupoint catgut embedding for simple obesity in animal studies:a systematic review and Meta-analysis

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Journal of Traditional Chinese Medicine 2023年第5期43卷 860-867页

作者： ZHAO HuiYan JUN Purumea LEE Chaewon han Chang-hyun Korean Convergence Medical Science University of Science and Technology(UST)School of Korea Institute of Oriental MedicineDaejeon 34054Republic of Korea KM Science Research Division Korea Institute of Oriental MedicineDaejeon 34054Republic of Korea KM Data Division Korea Institute of Oriental MedicineDaejeon 34054Republic of Korea St.Johnsbury Academy Jeju 304Global edu-roDaejeong-eupSeogwipo-si 63644Republic of Kore

OBJECTIVE:To assess the efficacy of acupoint catgut embedding(ACE)for simple obesity in preclinical animal ***:We searched the following 14 electronic databases:PubM ed,Cochrane Library,EMBASE,Oriental Medicine Advanced Searching Integrated System,KoreaMed,Korean Studies Information Service System,Science-on,Research Information Sharing Service,Korea Citation Index,Korea Traditional Knowledge Portal,China Network Knowledge Infrastructure Database,Wanfang Database,Chinese Science and Technology Journal Database,and Chinese Biology Medicine Database,from inception to November 2021 without language *** assessment was performed according to the guidelines of Animal Research:Reporting of in vivo experiments;and Metaanalysis was performed using Reviewer Manager 5.4.1 ***:Twenty-four studies involving 813 animals were ***-analysis showed that ACE was beneficial for weight control[n=40,MD=-50.63,95%CI(-57.59,-43.67),P<0.00001,I 2=0%]and reduced the Lee index[n=40,MD=-18.79,95%CI(-20.01,-17.57),P<0.00001,I 2=0%].However,when efficacy of ACE was compared with that of manual acupuncture,electroacupuncture,or oilistat therapy,statistical difference was not observed between the two ***:This systematic review suggests that ACE may be efficacious in treating ***,the analyses highlighted the necessity to perform welldesigned,higher-quality experiments.

关键词： obesity acupoint catgut embedding animal study Meta-analysis systematic review

Anticipating the lifespan: Predicting the durability of an anode-supported solid oxide fuel cell short stack over 50,000 h

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Progress in Natural Science:Materials International 2024年第3期34卷 606-613页

作者： Muhammad Zubair Khan Amjad Hussain seung-Bok Lee Tak-Hyoung Lim Rak-hyun Song Department of Materials Science & Engineering Pak-Austria Fachhochschule: Institute of Applied Sciences and Technology Hydrogen Energy Research Division Korea Institute of Energy Research Department of Advanced Energy and System Engineering Korea University of Science and Technology (UST)

In the present study, the operational lifetime of a solid oxide fuel(SOFC) short stack is predicted by investigating the performance degradation of both the short stack and its cells throughout 1000 h at 800°C. The short stack and integral cell voltages are continuously measured during the long-term test, with electrochemical impedance spectroscopy(EIS) conducted every 200 h. The short stack voltage decreased rapidly for the initial 200–300 h and afterwards, it decreased at a slow rate due to the increase in the Ohmic and polarization resistances in the same manner. Scanning electron microscopy results show that there is no delamination or cracking among constituent layers of the short-stack cells. The single degradation effects of the Ni coarsening in the anode, cation migration and surface segregation in cathode and oxide scale growth in metallic interconnect mesh are successfully integrated into a comprehensive lifetime prediction model. The experimentally measured voltage degradation data of the short stack fits well with the developed mathematical model and allows the successful prediction of the lifetime up to 50,000 h.

关键词： SOFC Stack Degradation Impedance Lifetime