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Assessment of colon polyp morphology: Is education effective?

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World Journal of Gastroenterology 2017年第34期23卷 6281-6286页

作者： Jae Hyun Kim Kyoung Sik Nam Hye Jung kwon Youn Jung Choi Kyoungwon Jung sung Eun Kim Won moon Moo In Park Seun Ja Park Division of Gastroenterology Department of Internal MedicineKosin University College of Medicine

AIM To determine the inter-observer variability for colon polyp morphology and to identify whether education can improve agreement among *** For purposes of the tests, we recorded colonoscopy video clips that included scenes visualizing the polyps. A total of 15 endoscopists and 15 nurses participated in the study. Participants watched 60 video clips of the polyp morphology scenes and then estimated polyp morphology(pre-test). After education for 20 min, participants performed a second test in which the order of 60 video clips was changed(post-test). To determine if the effectiveness of education was sustained, four months later, a third, follow-up test was performed with the same *** The overall Fleiss' kappa value of the inter-observer agreement was 0.510 in the pre-test, 0.618 in the post-test, and 0.580 in the follow-up test. The overall diagnostic accuracy of the estimation for polyp morphology in the pre-, post-, and follow-up tests was 0.662, 0.797, and 0.761, respectively. After education, the inter-observer agreement and diagnostic accuracy of all participants improved. However, after four months, the inter-observer agreement and diagnostic accuracy of expert groups were markedly decreased, and those of beginner and nurse groups remained similar to pre-test levels. CONCLUSION The education program used in this study can improve inter-observer agreement and diagnostic accuracy in assessing the morphology of colon polyps; it is especially effective when first learning endoscopy.

关键词：冒号息肉形态学教育

Variation in dynamic deformation behavior and resultant yield asymmetry of AZ80 alloy with extrusion temperature

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Journal of Materials Science & Technology 2020年第11期42卷 225-236页

作者： Sang-Hoon Kim Sang Won Lee Byoung Gi moon Ha Sik Kim sung Hyuk Park School of Materials Science and Engineering Kyungpook National UniversityDaegu702701South Korea Implementation Research Division Korea Institute of Materials ScienceChangwon51508South Korea

In this work,variation in the dynamic recrystallization(DRX)and dynamic precipitation behavior of AZ80 alloy during extrusion due to changes in extrusion temperature was investigated,and the resultant microstructure and yield asymmetry were *** the extrusion temperature increases from 250℃to 350℃,the primary DRX mechanism changes from twin-induced DRX to discontinuous DRX,resulting in an increase in the DRX area fraction and un DRXed grain *** addition,as the extrusion temperature rises,Mg17Al12 precipitation during extrusion decreases sharply throughout the extruded *** reduction in the compressive yield strength(CYS)with increasing extrusion temperature is more pronounced than it is for the tensile yield strength(TYS),which ultimately increases the yield asymmetry of the extruded *** higher extrusion temperature has less of an influence on the TYS due to the promotion of certain hardening *** the other hand,the greater reduction in the CYS is attributed to the increased fraction and size of regions in which{1012}twins predominantly form and the lower amount of precipitates,which effectively facilitates{1012}twinning.

关键词： Magnesium alloys Extrusion Recrystallization Precipitation Yield asymmetry

Cholecystectomy increases the risk of metabolic syndrome in the Korean population:a longitudinal cohort study

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Hepatobiliary Surgery and Nutrition 2023年第4期12卷 523-533,I0023页

作者： Ji Hye Huh Kyong Joo Lee Yun Kyung Cho Shinje moon Yoon Jung Kim Kyung-Do Han Jun Goo Kang Seong Jin Lee sung-Hee Ihm Department of Internal Medicine Hallym University College of MedicineChuncheonRepublic of Korea Department of Internal Medicine Asan Medical CenterUniversity of Ulsan College of MedicineSeoulRepublic of Korea Department of Statistics and Actuarial Science Soongsil UniversitySeoulRepublic of Korea

Background:Cholecystectomy is a common surgical procedure to treat symptomatic gallstones;however,the long-term outcomes after cholecystectomy are ***,we aimed to investigate whether incident metabolic syndrome(MetS)is associated with cholecystectomy through a large,population-based,longitudinal ***:Subjects aged≥20 years who underwent cholecystectomy from 2010 to 2014(n=76,485)and controls(n=76,485),matched for age and sex,were identified from the Korean National Health Insurance *** proportional hazards analyses were performed to evaluate the association between cases and incident MetS,and hazard ratios and 95% confidence intervals(CIs)were ***:A total of 152,970 patients were *** age was 52.47±12.76 years,and 50.65% of participants were *** the follow-up period,there were 38,979(25.48%)newly diagnosed MetS cases in the study *** risk of MetS in the cholecystectomy group was approximately 20% higher than that in the control group[adjusted odds ratio(OR),1.20;95%CI:1.17-1.23].In the fully adjusted models,the corresponding ORs for new-onset high waist circumference(WC),low high-density lipoprotein cholesterol(HDL-C)levels,high triglycerides(TG)levels,high blood pressure(BP),and high blood glucose levels were 1.16(1.13-1.19),1.19(1.16-1.22),1.25(1.22-1.28),1.27(1.23-1.31),and 1.21(1.18-1.24),*** was an independent risk factor of incident MetS,after adjusting for potential confounding *** the subgroup analyses,the cholecystectomy group had a higher risk of MetS than the control group in subjects without hypertension or dyslipidemia,***:In this large,population-based study,cholecystectomy was associated with an increased risk of developing MetS,independent of other confounding ***,careful monitoring of metabolic variables and long-term follow-up are required to evaluate MetS risk after cholecystectomy.

关键词： Cholecystectomy metabolic syndrome(MetS) obesity diabetes cardiovascular risk

Nucleus-Encoded Thylakoid Protein,OsY3IP1,Confers Enhanced Tolerance to Saline and Alkaline Stresses in Rice

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Rice science 2022年第3期29卷 225-236页

作者： Hyeran moon Young-Ah KIM Ryoung SHIN Chang-Jin PARK Department of Molecular Biology Sejong University Department of Bioresources Engineering Sejong University RIKEN Center for Sustainable Resource Science Plant Engineering Research Institute Sejong University

Abiotic stress confers serious damage to the photosynthetic machinery,often resulting in plant growth *** chloroplast open reading frame 3(Ycf3)-interacting protein 1(Y3IP1)is a nucleus-encoded thylakoid protein and plays an essential role in the assembly of photosystem *** full-length cDNA over-expresser(FOX)gene-hunting system is an approach using systemically generated gain-of-function *** the FOX-rice lines,a line CE175 overexpressing rice Y3IP1gene(Os Y3IP1)displayed less inhibition of root growth under saline(NaCl)*** expression of Os Y3IP1 was up-regulated under saline and alkaline(Na2CO3)stresses in the rice variety *** saline and alkaline treatments,transgenic Kitaake overexpressing OsY3IP1-GFP(OsY3IP1-GFPox/Kit)displayed higher levels of chlorophyll content compared to *** the stress conditions,the maximum quantum yield of photosystem II photochemistry levels was higher in OsY3IP1-GFPox/Kit than in *** increased tolerance conferred by OsY3IP1 overexpression correlated with reduced reactive oxygen species *** data provide new insights into the possible role of OsY3IP1 in the pathway suppressing photooxidative damage under stress *** features can be further exploited to improve saline and alkaline tolerances of rice plants in future.

关键词： alkaline reactive oxygen species rice saline stress tolerance

Are prostatic calculi independent predictive factors of lower urinary tract symptoms？

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Asian Journal of Andrology 2010年第2期12卷 221-226页

作者： sung-Woo Park Jong-Kil Nam Sang-Don Lee moon-Kee Chung Medical Research Institute and Department of Urology Pusan National University Yangsan Hospital Yangsan 626-770Korea

We determined the correlation between prostatic calculi and lower urinary tract symptoms （LUTS）,as well as the predisposing factors of prostatic calculi. Of the 1 527 patients who presented at our clinic for LUTS,802underwent complete evaluations,including transrectal ultrasonography,voided bladder-3 specimen and international prostatic symptoms score （IPSS）. A total of 335 patients with prostatic calculi and 467 patients without prostatic calculi were divided into calculi and no calculi groups,respectively. Predictive factors of severe LUTS and prostatic calculi were determined using uni/multivariate analysis. The overall IPSS score was 15.7±9.2 and 14.1±9.1 in the calculi and no calculi group,respectively （P = 0.013）. The maximum flow rate was 12.1±6.9 and 14.2±8.2 mL s^（-1） in the calculi and no calculi group,respectively （P = 0.003）. On univariate analysis for predicting factors of severe LUTS,differences on age （P = 0.042）,prostatic calculi （P = 0.048） and prostatitis （P = 0.018） were statistically significant. However,on multivariate analysis,no factor was significant. On multivariate analysis for predisposing factors of prostatic calculi,differences on age （P〈0.001） and prostate volume （P = 0.001） were significant. To our knowledge,patients who have prostatic calculi complain of more severe LUTS. However,prostatic calculi are not an independent predictive factor of severe LUTS. Therefore,men with prostatic calculi have more severe LUTS not only because of prostatic calculi but also because of age and other factors. In addition,old age and large prostate volume are independent predisposing factors for prostatic calculi.

关键词： micturition prostate prostatic diseases

Ultrasensitive and Highly Stretchable Multiple‑Crosslinked Ionic Hydrogel Sensors with Long‑Term Stability

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Nano-Micro Letters 2023年第4期15卷 85-96页

作者： Jin‑Young Yu Seung Eon moon Jeong Hun Kim Seong Min Kang Department of Mechanical Engineering Chungnam National UniversityDaejeon 34134Korea Emerging Nano‑Materials Research Section Electronics and Telecommunications Research InstituteDaejeon 305‑700Republic of Korea

Flexible hydrogels are receiving significant attention for their application in wearable ***,most hydrogel materials exhibit weak and one-time adhesion,low sensitivity,ice crystallization,water evaporation,and poor self-recovery,thereby limiting their application as *** issues are only partly addressed in previous ***,a multiplecrosslinked poly(2-(methacryloyloxy)ethyl)dimethyl-(3-sulfopropyl)ammonium hydroxide-co-acrylamide)(P(SBMA-co-AAm))multifunctional hydrogel is prepared via a one-pot synthesis method to overcome the aforementioned ***,ions,glycerol,and 2-(methacryloyloxy)ethyl)dimethyl-(3-sulfopropyl)ammonium hydroxide are incorporated to reduce the freezing point and improve the moisture retention *** proposed hydrogel is superior to existing hydrogels because it exhibits good stretchability(a strain of 2900%),self-healing properties,and transparency through effective energy dissipation in its dynamic crosslinked ***,2-(methacryloyloxy)ethyl)dimethyl-(3-sulfopropyl)ammonium hydroxide as a zwitterion monomer results in an excellent gauge factor of 43.4 at strains of 1300-1600%by improving the ion transportability and achieving a strong adhesion of 20.9 kPa owing to the dipole-dipole *** proposed hydrogel is promising for next-generation biomedical applications,such as soft robots,and health monitoring.

关键词： Hydrogel sensors Biocompatibility Multifunction High-sensitivity sensors Multiple-crosslink association

Hybrid functional IrO_2-TiO_2 thin film resistor prepared by atomic layer deposition for thermal inkjet printheads

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Transactions of Nonferrous Metals Society of China 2011年第A1期21卷 88-91页

作者： Won-Sub KWACK Hyoung-Seok moon Seong-Jun JEONG Qi-min WANG Se-Hun kwon National Core Research Center for Hybrid Materials Solution Pusan National University Busan 609-735 Korea Department of Materials Science and Engineering Korea Advanced Institute of Science and Technology Daejon 373-1 Korea

IrO2-TiO2 thin films were prepared by atomic layer deposition using Ir(EtCp)(COD) and titanium isopropoxide (TTIP). The resistivity of IrO2-TiO2 thin films can be easily controlled from 1 500 to 356.7 μΩ·cm by the IrO2 intermixing ratio from 0.55 to 0.78 in the IrO2-TiO2 thin films. The low temperature coefficient of resistance(TCR) values can be obtained by adopting IrO2-TiO2 composite thin films. Moreover, the change in the resistivity of IrO2-TiO2 thin films was below 10% even after O2 annealing process at 600 °C. The step stress test results show that IrO2-TiO2 films have better characteristics than conventional TaN0.8 heater resistor. Therefore, IrO2-TiO2 composite thin films can be used as a heater resistor material in thermal inkjet printhead.

关键词： IrO2 喷墨打印头原子层沉积二氧化钛薄膜电阻制备 TiO2薄膜沉积法

Synergetic effects of shock waves with polydeoxyribonucleotides on rotator cuff tendon tear in a rabbit model

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BIOCELL 2021年第3期45卷 527-536页

作者： DONG HAN KIM DONG RAK kwon GI-YOUNG PARK YONG SUK moon Department of Rehabilitation Medicine Catholic University of Daegu School of MedicineDaegu42472South Korea Department of Anatomy Catholic University of Daegu School of MedicineDaegu42472South Korea

This work aimed to investigate the synergetic therapeutic effects of polydeoxyribonucleotides(PDRN)combined with extracorporeal shock waves therapy(ESWT)and the effects of the therapy according to ESWT sequences on a chronic traumatic full-thickness rotator cuff tear(RCT)in rabbit *** this purpose,thirty-two rabbits were randomly allocated into 4 *** excision was made to create a 5-mm sized full-thickness RCT right proximal to the insertion site on the *** 6 weeks,4 different procedures(normal saline,Group 1;PDRN injection,Group 2;PDRN injection before ESWT,Group 3;PDRN injection after ESWT,Group 4)were *** injection and radial type ESWT were each performed 4 times per *** morphology,Immunohistochemistry,and motion analysis were performed at 4 weeks after *** parameters including tear size,Masson’s trichrome(MT)staining,anti-collagen 1 monoclonal antibody immunostaining(COL-1),proliferating cell nuclear antigen(PCNA),vascular endothelial growth factor(VEGF),anti-platelet endothelial cell adhesion molecule-1 polyclonal antibody(PECAM-1),and motion analysis,were significantly greater in Group 2,Group 3,and Group 4 than in Group *** Group 4,all parameters were significantly greater than in Group 2,and parameters including MT staining,COL-1,PCNA,PECAM-1,and fast walking time were significantly greater than Group *** were no significant differences between Group 2 and Group *** study demonstrated that PDRN injection alone and combined with ESWT were more effective than control treatment and applying ESWT before PDRN injection was also shown to yield better outcomes in parameters including angiogenesis,cell proliferation,and fast walking time in a rabbit model with chronic traumatic full-thickness ***,the application of ESWT before PDRN injection could be recommended for optimal outcomes of the conservative treatments when the patients with full-thickness RCT are not suitable in surgical treatment

关键词： Shoulder Rotator cuff Polydeoxyribonucleotides Extracorporeal shock waves

Robust vision-based displacement measurement and acceleration estimation using RANSAC and Kalman filter

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Earthquake Engineering and Engineering Vibration 2023年第2期22卷 347-358页

作者： Jongbin Won Jong-Woong Park Min-Hyuk Song Youn-Sik Kim Dosoo moon Department of Civil and Environmental Engineering Chung-Ang UniversityDongjakSeoul 06974Korea Department of Smart Cities Chung-Ang UniversityDongjakSeoul 06974Korea R&D Division Tantan Safety co.LtdSeongdongSeoul 04798Korea Department of Civil and Environmental Engineering University of Hawaii at ManoaHonolulu 96822USA

Computer vision(CV)-based techniques have been widely used in the field of structural health monitoring(SHM)owing to ease of installation and cost-effectiveness for displacement *** paper introduces computer vision based method for robust displacement measurement under occlusion by incorporating random sample consensus(RANSAC).The proposed method uses the Kanade-Lucas-Tomasi(KLT)tracker to extract feature points for tracking,and these feature points are filtered through RANSAC to remove points that are noisy or *** the filtered feature points,the proposed method incorporates Kalman filter to estimate acceleration from velocity and displacement extracted by the *** validation,numerical simulation and experimental validation are *** the simulation,performance of the proposed RANSAC filtering was validated to extract correct displacement out of group of displacements that includes dummy displacement with noise or *** the experiment,both RANSAC filtering and acceleration measurement were validated by partially occluding the target for tracking attached on the *** results demonstrated that the proposed method successfully measures displacement and estimates acceleration as compared to a reference displacement sensor and accelerometer,even under occluded conditions.

关键词： computer vision structural displacement structural acceleration RANSAC Kalman filter