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Etching characteristics and surface modification of InGaSnO thin films under Cl_(2)/Ar plasma

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Plasma Science and Technology 2023年第10期25卷 91-96页

作者： Young-Hee JOO Jae-Won CHOI Bo HOU hyuck-In kwon Doo-Seung UM Chang-Il KIM Department of Electronic and Electrical Engineering Chung-Ang UniversitySeoul 06974Republic of Korea Department of Firearms and Optics Daeduk UniversityDaejeon 34111Republic of Korea School of Physics and Astronomy Cardiff UniversityCardiff CF243AAUnited Kingdom Department of Electrical Engineering Sejong UniversitySeoul 05006Republic of Korea

Indium gallium tin oxide(IGTO)thin films have the potential for high mobility and lowtemperature processing,which makes them suitable for applications such as display backplanes and high-voltage switching ***,very few studies have investigated the plasmaetching characteristics of IGTO and changes in its properties after *** this study,the etching characteristics of IGTO were investigated using Cl_(2)/Ar plasma,and changes in surface properties were *** showed that the etch rate increased with an increase in the proportion of Cl_(2),with the highest etch rate observed at 69 nm min^(-1)in pure Cl_(2)plasma with a gas flow rate of 100 ***,increased radio-frequency power caused a rise in the etch rate,while a process pressure of 15 m Torr was *** primary etching mechanism for IGTO thin films under Cl_(2)plasma was a chemical reaction,and an increased work function indicated the occurrence of defects on the *** addition,the etching process reduced the surface roughness of Cl_(2)-containing plasma,whereas the etching process in pure Ar plasma increased surface *** study contributes to a better understanding of the plasmaetching characteristics of IGTO and changes in its properties after etching,providing valuable insights for IGTO-based applications.

关键词： InGaSnO Cl2-based plasma etching mechanism surface modification plasma etching

Submillimeter wave communication versus millimeter wave communication

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Digital Communications and Networks 2020年第1期6卷 64-74页

作者： Madhuprana Goswami hyuck M.kwon Department of Electrical Engineering and Computer Science Wichita State University1845 N.FairmountWichitaKS67260USA

This paper studies the performance of a submillimeter wave antenna operating between frequencies 0.1 THz and 10 THz with a 4-cyano-4-pentylbiphenyl[5CB]*** the size and shape of the antenna impact its gain/directivity,resonant frequency,bandwidth,and efficiency,the two antenna types considered in this paper are:(a)Rectangular Patch Antenna(RPA),and(b)Cylindrical Dielectric Resonator Antenna(CDRA).Here a submillimeter wave antenna is compared with a millimeter wave(a few GHz to 100 GHz)*** popular mmwave antennas are chosen for the submillimeter wave antenna in order to understand changes in their performance as the result of changes in their geometrical *** bei Korpern mit beliebiger Oberflache(FEKO)software is used for the design and calculation of the Three-Dimensional(3D)ElectroMagnetic(EM)*** paper also concentrates on the design and analysis of a massive submillimeter wave Multiple-Input Multiple-Output(MIMO)(8 by 8)RPA and CDRA.

关键词： Submillimeter wave antenna Millimeter wave antenna Rectangular micro-strip patch antenna Cylindrical dielectric resonator antenna Massive submillimeter wave MIMO antenna Applications

Hepatobiliary scintigraphy for detecting biliary strictures after living donor liver transplantation

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World Journal of Gastroenterology 2011年第21期17卷 2626-2631页

作者： Yu Jin Kim Kyu Taek Lee Young Cheol Jo Kwang hyuck Lee Jong Kyun Lee Jae-Won Joh Choon hyuck David kwon Department of Medicine Samsung Medical CenterSungkyunkwan University School of Medicine Department of Surgery Samsung Medical CenterSungkyunkwan University School of Medicine

AIM:To investigate the diagnostic accuracy of hepatobiliary scintigraphy(HBS) in detecting biliary strictures in living donor liver transplantation(LDLT) ***:We retrospectively reviewed 104 adult LDLT recipients of the right hepatic lobe with duct-toduct anastomosis,who underwent HBS and *** HBS results were categorized as normal,parenchymal dysfunction,biliary obstruction,or bile leakage without *** presence of biliary strictures was determined by percutaneous cholangiography or endoscopic retrograde cholangiopancreatography(ERCP).RESULTS:In 89 patients with biliary strictures,HBS showed biliary obstruction in 50 and no obstruction in 39,for a sensitivity of 56.2%.Of 15 patients with no biliary strictures,HBS showed no obstruction in 11,for a specificity of 73.3%.The positive predictive value(PPV) was 92.6%(50/54) and the negative predictive value(NPV) was 22%(11/50).We also analyzed the diagnostic accuracy of the change in bile duct *** sensitivity,NPV,specificity,and PPV were 65.2%,27.9%,80% and 95%,***:The absence of biliary obstruction on HBS is not ***,when post-LDLT biliary strictures are suspected,early ERCP may be considered.

关键词： Living donor liver transplantation Tc99m mebrofenin Radionucleotide imaging Hepatobiliary scintigraphy Biliary stricture

Serum prostate-specific antigen as a predictor of prostate volume and lower urinary tract symptoms in acommunity-based cohort： a large-scale Korean screening study

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Asian Journal of Andrology 2013年第2期15卷 249-253,I0008页

作者： Dong Soo Park Jong Jin Oh Jae Yup Hong Young kwon Hong Don Kyung Choi In hyuck Gong Jin HoHwang Sung Won kwon Department of Urology CHA Bundang Medical Center CHA University Seongnam 463-712 Korea CHA Cancer Research Center Seou1135-081 Korea Department of Urology CHA Gangnam Medical Center CHA University Seou1135-081 Korea Korea Prostate Health Council Seou1137-070 Korea

The aim of this study is to assess the ability of serum prostate-specific antigen （PSA） to predict prostate volume （PV） and lower urinary tract symptoms （LUTS） represented by the international prostate symptom score （IPSS）. From January 2001 to December 2011, data were collected from men who first enrolled in the Korean Prostate Health Council Screening Program. Patients with a serum PSA level of 10 ng ml^-1 or age 〈40 years were excluded. Accordingly, a total of 34 857 men were included in our study, and serum PSA, PV and the IPSS were estimated in all patients. Linear and age-adjusted multivariate logistic analyses were used to assess the potential association between PSA and PV or IPSS. The predictive value of PSA for estimating PV and IPSS was assessed based on the receiver operating characteristics-derived area under the curve （AUC）. The mean PV was 29.9 ml, mean PSA level was 1.49 ng ml^-1 and mean IPSS was 15.4. A significant relationship was shown between PSA and PV, and the IPSS and PSA were also significantly correlated after adjusting by age. The AUCs of PSA for predicting PV ~20 ml, 〉25 ml and 〉35 ml were 0.722, 0.728 and 0.779, respectively. The AUCs of PSA for predicting IPSS 〉 7, 〉 13 and 〉 19 were 0. 548, 0.536 and 0. 537, respectively. Serum PSA was a strong predictor of PV in a community-based cohort in a large-scale screening study. Although PSA was also significantly correlated with IPSS, predictive values of PSA for IPSS above the cutoff levels were not excellent. Further investigations are required to elucidate the exact interactions between PSA and LUTS and between PSA and PV in prospective controlled studies. Such studies may suggest how PSA can be used to clinically predict PV and the IPSS.

关键词： lower urinary tract symptoms (LUTS) prostate prostate-specific antigen (PSA) prostate volume (PV)

GROWTH AND MORPHOLOGY OF POLYMER-ACTIN COMPLEXES

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Chinese Journal of Polymer Science 2007年第1期25卷 47-55页

作者： hyuck Joon kwon Kazuhiro Shikinaka Akira Kakugo Hidemitsu Furukawa Yoshihito Osada 龚剑萍 Graduate School of Science Hokkaido UniversitySapporo 060-0810Japan Graduate School of Science Hokkaido UniversitySapporo 060-0810Japan SORSTJSTSapporo 060-0810Japan

F-actins are semi-flexible polyelectrolytes and can be assembled into large polymer-actin complex with polymorphism through electrostatic interaction with polycations. This study investigates the structural phase behavior and the growth of polymer-actin complexes in terms of its longitudinal and lateral sizes. Our results show that formation of polymer-actin complexes is cooperative, and morphology and growth of polymer-actin complexes depend on polycation species and concentrations of polycation and salt in a constant actin concentration. We found that the longitudinal growth and lateral growth of polymer-actin complexes are dominated by different factors. This induces the structural polymorphism of polymer-actin complexes. Major factors to influence the polymorphism of polymer-actin complexes in polyelectrolytc system have been discussed. Our results indicate that the semi-flexible polyelectrolyte nature of F-actins is important for controlling the morphology and growth ofactin architectures in cell.

关键词： F-actin Polymer-actin complex Polycation concentration (Cp) KCl concentration (Cs) Fluorescence microscopy Transmission electron microscopy (TEM) Rod-like polyelectrolyte.

Positive autoantibodies in living liver donors

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World Journal of Hepatology 2022年第9期14卷 1757-1766页

作者： Joyce Loh Koji Hashimoto Choon hyuck David kwon Masato Fujiki Jamak Modaresi Esfeh Department of Internal Medicine Cleveland Clinic FoundationClevelandOH 44195United States Digestive Diseases Institute Cleveland Clinic FoundationClevelandOH 44195United States Digestive Disease and Surgery Institute Cleveland Clinic FoundationClevelandOH 44195United States

BACKGROUND There is a nationwide shortage of organs available for liver *** donors help meet this growing *** uncommonly,donors will have positive ***,it is unclear whether donor positive autoantibodies are correlated with worse outcomes following living liver donor *** To analyze the significance of positive autoantibodies in donors on post-transplant outcomes in *** We performed a retrospective review of living liver donors who had undergone liver transplantation between January 1,2012 and August 31,*** characteristics and pre-transplant data including antinuclear antibodies(ANA)and anti-smooth muscle antibody titers were collected in *** of interest were post-transplantation complications including mortality,biliary strictures,biliary leaks,infection,and *** recipients and donors without measured pre-transplant autoantibody serologies were excluded from this *** 172 living donor liver transplantations were performed during the study period,of which 115 patients met inclusion criteria.37(32%)living donors were autoantibody-positive with a median ANA titer of 1:160(range 1:80 to 1:1280)and median anti-SMA titer of 1:40(range 1:20 to 1:160).There were no significant differences in baseline demographics between the autoantibody positive and negative ***-transplantation rates of death(P value=1),infections(P value=0.66),and overall rates of complications(P value=0.52)were similar between the autoantibody positive and negative *** incidences of anastomotic strictures and rejection were observed in the autoantibody positive group;however,these differences were not statistically significant(P value=0.07 and P value=0.30 respectively).CONCLUSION Isolated pre-transplant autoantibody positivity is not correlated to worse post-transplant outcomes in living liver donor transplants.

关键词： Antinuclear antibodies Anti-smooth muscle antibody Liver transplantation Treatment outcome Transplant donors

Severe thrombocytopenia before liver transplantation is associated with delayed recovery of thrombocytopenia regardless of donor type

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World Journal of Gastroenterology 2008年第37期14卷 5723-5729页

作者： Jae hyuck Chang Jong Young Choi Hyun Young Woo Jung Hyun kwon Chan Ran You Si Hyun Bae Seung Kew Yoon Myung-Gyu Choi In-Sik Chung Dong Goo Kim Department of Internal Medicine College of Medicine the Catholic University of Korea505 Banpo-Dong Seocho-Gu Seoul 137-040 Korea Department of Surgery College of Medicine the Catholic University of Korea505 Banpo-Dong Seocho-Gu Seoul 137-040 Korea

AIM： To compare the recovery of thrombocytopenia and splenomegaly during long-term follow-up after liver transplantation in patients receiving a living donor transplant or a cadaveric donor transplant. METHODS： This was a retrospective cohort study of 216 consecutive liver transplant patients who survived for 〉 6 mo after transplantation; 169 received a liver transplant from a living donor and 47 from a cadaveric donor. The platelet counts or spleen volumes were examined before transplant, i, 6, and 12 mo after transplant, and then annually until 5 years after transplant. RESULTS： The mean follow-up period was 49 mo （range, 21-66）. Platelet counts increased continuously for 5 years after orthotopic liver transplant. The restoration of platelet counts after transplant was significantly slower in patients with severe pretransplant thrombocytopenia （〈 50000/μL） until 4 years after transplant （P = 0.005）. Donor type did not significantlyaffect the recovery of platelet count and spleen volume in either patient group. In multivariate analysis, pretransplant severe thrombocytopenia （〈 50000/μL） was an independent factor associated with sustained thrombocytopenia （P 〈 0.001, odds ratio 6.314; confidence interval, 2.828-14.095）. Thrombocytopenia reappeared after transplant in seven patients with portal flow disturbance near the anastomosis site. CONCLUSION： Our study suggests that severe thrombocytopenia before transplant is closely associated with delayed recovery of platelet count after transplant and donor type did not affect the recovery of thrombocytopenia. The reappearance of thrombocytopenia after transplant should be considered a possible indicator of flow disturbance in the portal vein.

关键词： Liver transplantation Thrombocytopenia Splenomegaly Hypersplenism

A compact polymer–inorganic hybrid gas barrier nanolayer for flexible organic light-emitting diode displays

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npj Flexible Electronics 2022年第1期6卷 204-209页

作者： Seung Hun Kim Seung Yong Song Soo Youn Kim Moon Won Chang Hyo Jeong kwon Kwan hyuck Yoon Woo Yong Sung Myung Mo Sung Hye Yong Chu Display Research Center Samsung DisplayYongin-siGyeonggi-do 17113Republic of Korea Department of Chemistry Hanyang UniversitySeoul 04763Republic of Korea

Atomic layer infiltration technology allows the formation of a nanometer-thick polymer-inorganic hybrid barrier layer in polymer material for flexible organic light-emitting diode(OLED)*** this study,according to transmission electron microscopy and secondary-ion mass spectrometry analysis results under various process conditions,a compact polymer-inorganic hybrid nanolayer was successfully formed in a polymer and good barrier performance was revealed with a low water vapor transmission rate under optimal process ***,through gas chromatography-mass spectrometry measurements after ultra-violet radiation testing,polymer out-gassing decreased compared to bare *** on barrier properties,the polymer with a polymer-inorganic hybrid barrier nanolayer was applied to a flexible OLED display as a *** storage tests and folding tests,the flexible OLED display exhibits good reliability and better flexibility compared to those with an inorganic barrier *** results confirm that the polymer-inorganic hybrid nanolayer is suitable for barrier layer formation in flexible OLED displays.

关键词： diode barrier layer

Single hepatocellular carcinoma ≤ 3 cm in left lateral segment:Liver resection or radiofrequency ablation?

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World Journal of Gastroenterology 2014年第14期20卷 4059-4065页

作者： Jong Man Kim Tae Wook Kang Choon hyuck David kwon Jae-Won Joh Justin Sangwook Ko Jae Berm Park Hyunchul Rhim Joon Hyeok Lee Sung Joo Kim Seung Woon Paik Department of Surgery Samsung Medical CenterSungkyunkwan University School of Medicine Department of Radiology and Center for Imaging Science Samsung Medical CenterSungkyunkwan University School of Medicine Department of Anesthesiology and Pain Medicine Samsung Medical CenterSungkyunkwan University School of Medicine Division of Gastroenterology Department of MedicineSamsung Medical CenterSungkyunkwan University School of Medicine

AIM: To evaluate the long-term results of radiofrequency ablation (RFA) compared to left lateral sectionectomy (LLS) in patients with Child-Pugh class A disease for the treatment of single and small hepatocellular car... 详细信息

关键词： Small hepatocellular carcinoma Left lateral segment Radiofrequency ablation Liver resection Tumor recurrence Survival