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Retinal artery/arteriole occlusion risks after endovascular treatment for unruptured intracranial aneurysm

Stroke & Vascular Neurology 2024年第3期9卷 295-305,I0251-I0263页

作者： Hae Rang Kim Min Jeoung Kim Sunyeup Kim Myung Soo Chang Dong Joon Kim Byung Moon Kim Keun Young Park Yong Bae Kim Christopher Seungkyu Lee suk ho byeon Sung Soo Kim Seung Won Lee Yong Joon Kim Department of Ophthalmology CHA Bundang Medical CenterCHA University College of MedicineSeongnamKorea(the Republic of) Department of Neurosurgery Severance Stroke CenterSeverance HospitalYonsei University College of MedicineSeoulKorea(the Republic of) Department of Neurosurgery Uijeongbu St.Mary’s HospitalThe Catholic University of Korea College of MedicineUijeongbuKorea(the Republic of) Department of Medical AI Sungkyunkwan University School of MedicineSuwonKorea(the Republic of) Department of Ophthalmology Institute of Vision ResearchYonsei University College of MedicineSeoulKorea(the Republic of) Department of Radiology Severance Stroke CenterSeverance HospitalYonsei University College of MedicineSeoulKorea(the Republic of) Department of Precision Medicine Sungkyunkwan University School of MedicineSuwonKorea(the Republic of)

Background To evaluate the association between retinal artery/arteriole occlusion(RAO)and unruptured intracranial aneurysm(UIA).Methods Incident UIA patients from a nationwide cohort(n=253240)were categorised into three groups based on subsequent treatment:observation(n=208993),microsurgical clipping(n=14168)and endovascular treatment(EVT)groups(n=30079).The incidence and the incident time of RAO were *** of RAO and associated risk factors were ***,a hospital cohort comprising 2569 consecutive UIA patients treated at a tertiary hospital was analysed with detailed clinical information of *** In the nationwide cohort analysis,the incidence of RAO was significantly higher in EVT group than in observation and clipping groups,especially within 60 days(early RAO(within 60 days):HR=4.00,95%CI:2.44 to 6.56);delayed RAO(after 60 days:HR=1.74,95%CI:1.13 to 2.68).Multivariable analysis showed that the presence of chronic kidney disease(p=0.009)and use of a balloon microcatheter during the procedure(p=0.013)were associated with a higher risk of *** hospital cohort analysis,11(0.8%)cases of RAO occurred after EVT,whereas none occurred after microsurgical clipping(phould be taken when treating paraclinoid aneurysms with balloon microcatheters.

关键词： treatment nationwide balloon

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A brief summary of tungsten technology development in Korea

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Tungsten 2020年第1期2卷 72-82页

作者： suk-ho hong DEMO Technology Division Advanced Technology Research Center National Fusion Research InstituteDaejeon 34133Korea

A review of tungsten technology development in Korea is briefly *** to the upgrade plan of Korea super-conducting tokamak advanced research(KSTAR)tokamak associated with Korean fusion energy R&D program,graphite plasma-facing components will be replaced with tungsten-based ones to handle the high-peak heat load caused by an increase of heating power up to 26 *** technique to bond tungsten was developed and tungsten blocks were *** were installed at the central divertor in KSTAR and exposed to high heat *** high heat flux and long-pulse discharge,tungsten blocks were severely *** tungsten materials show movements towards the high field side,which is j×B *** COMSOL^(®)modeling described the melting event quantitatively *** failure of a water cooling system with a metal wall environment during a long-pulse plasma operation is very critical.

关键词： Demonstration reactor Divertor Tungsten

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Enterovenous fistulization: A rare complication of Crohn's disease

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World Journal of Gastroenterology 2011年第47期17卷 5227-5230页

作者： Jeong Woo Lim Kyung-Jo Kim Byong Duk Ye Jeong-Sik byeon Seung-Jae Myung suk-Kyun Yang Jin ho Kim Division of Gastroenterology Department of Internal Medicine University of Ulsan College of Medicine Asan Medical Center

The presence of hepatic portal venous gas (HPVG) is associated with numerous diseases, and has been regarded as a serious, even catastrophic condition. however, anecdotal reports mention that some patients with inflammatory bowel disease (IBD), who developed HPVG after diagnostic examinations of the colon, were successfully managed with antibiotic therapy and have followed benign courses. In contrast, among IBD patients, the development of HPVG is rarely caused by enterovenous fistula. We describe a 32-year-old man with Crohn's ileocolitis who presented with hypotension and fever associated with HPVG, as well as superior mesenteric vein thrombosis, possibly caused by enterovenous fistula, who was successfully managed by surgery. We also review the literature concerning portal venous gas associated with Crohn's disease.

关键词： Crohn's disease Enterovenous fistula Portal venous gas

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Effects of casting speed on microstructure and segregation of electromagnetically stirred Aluminum alloy in continuous casting process

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Rare Metals 2006年第Z2期25卷 118-123页

作者： LEE Dock-Young KANG suk-Won Cho Duck-ho KIM Ki-Bae Division of Materials Korea Institute of Science and Technology P.O. Box 131 Cheongryang Seoul 130-650 Korea Department of Applied Materials Engineering Hanbat National University Daejeon 305-719 Korea

Recently, a semi-solid metal processing has been acknowledged as a cost-effective technique to be able to manufacture high quality product for the transportation industry. In this study a hypo-eutectic Al alloy was fabricated by means of an electromagnetic stirrer in continuous casting process and the microstructural change during solidification due to a fluid flow by electromagnetic stirring was examined. Due to the forced fluid flow during solidification a dendritic phase of primary α phase of Al alloy was turned into a globular phase, which can make the Al alloy get a thixotropic behavior in the semi-solid region. In order to establish the quantitative relationship between microstructure and the process parameters, the morphology shape, a silicon distribution and a size of primary α phase were observed according to casting speed in continuous casting machine. The primary α phase was turned into the degenerate dendrites approaching a spherical configuration with increasing casting speed. The fine-grained and equiaxed microstructure appeared at higher casting speed. A segregation behavior of Si element was declined with increasing casting speed and a very uniform distribution of Si element was observed on the billet at a casting speed of 600 mm·min-1. A thickness of the solidifying shell of the billet was shortened with increasing the casting speed.

关键词： semi-solid slurry electromagnetic stirring casting speed segregation Al alloy

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Variability and Risk Analysis of hong Kong Air Quality Based on Monsoon and El Nino Conditions

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Advances in Atmospheric Sciences 2013年第2期30卷 280-290页

作者： Jong-suk KIM ZhoU Wen ho Nam CHEUNG Chak Hang ChoW School of Energy and Environment City University of Hong Kong Hong Kong Guy Carpenter Asia-Pacific Climate Impact Centre City University of Hong Kong Hong Kong

This study presents an exploratory analysis aimed at improving understanding of the variability of hong Kong air quality associated with different climate conditions. Significantly negative correlations were found when Nifio 3 led particulate matter 〈10 p.m PM10） and NO2 by 2 3 months over the hong Kong territory, while the other pollutants （e.g., Oa, SO2） showed modest correlations. A significant decreasing trend in visibility was observed during the autumn and winter, which has potential implications for the air-quality degradation and the endangerment of human health in hong Kong. In an E1 Nifio summer, the visibility was relatively better, while visibility in other seasons was diminished. On the other hand, in La Nifia events, significant changes occurred in visibility in winter and autumn. Air pollution indices were less sensitive to the South China Summer Monsoon （SCSM）, but a relatively high correlation existed between the East Asian Winter Monsoon （EAWM） and air pollutants. Rainfall was lower during most of the strong EAWM years compared to the weak years. This result suggests that the pollutants that accumulate in hong Kong are not easy to wash out, so concentrations remain at a higher level. Finally, based on the conditional Air Pollution Index （API） risk assessment, site-specific vulnerabilities were analyzed to facilitate the development of the air-quality warning systems in hong Kong.

关键词： air quality E1 Nifio/La Nifia Monsoon API risk hong Kong

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Fabrication and Characterization of Electrodeposited Ni-SiC-h/BN Composite Coatings

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Journal of Materials Science & Technology 2014年第8期30卷 796-802页

作者： Gobinda Gyawali Hyung-suk Kim Khagendra Tripathi Tae-ho Kim Soo Wohn Lee Research Center for Eco-Multifunctional Nano Materials Sun Moon UniversityAsanRepublic of Korea Department of Environmental Engineering Sun Moon UniversityChungnam 336-708Republic of Korea

Ni—SiC—h/BN composite materials were prepared by electrodeposition technique with the dispersion of SiC（10 g/L） and h/BN nanosheets（10 g/L） in a nickel sulfamate electrolytic *** ratio of sodium dodecyl sulfate（SDS） and cetyltrymethyl ammonium bromide（CTAB） surfactants were used to evaluate the effect of surfactants on the properties of the electrodeposited composite *** coating samples were characterized by scanning electron microscopy,X-ray diffraction,Vickers microhardness test,scratch and tribology *** results revealed that the co-deposition of nanoparticles was significantly influenced by surfactants during electrodeposition *** or polyhedral nickel crystallites were observed at higher ratio of SDS/CTAB while smaller oval grains with refined surface morphologies were obtained at lower ratio of SDS/CTAB *** addition,wt%of particles co-deposition was increased,and Vickers microhardness,wear and coefficient of friction of the electrodeposited composite coatings were improved at increased CTAB and decreased SDS contents in the electrolyte during electrodeposition process.

关键词： Ni-SiC-h/BN Composite coating Surfactant Microstructure Scratch Wear

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Sub-picosecond,strain-tunable,polarizationselective optical switching via anisotropic exciton dynamics in quasi-1D ZrSe_(3)

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Light(Science & Applications) 2024年第11期13卷 2576-2588页

作者： Sang ho suk Sanghee Nah Muhammad Sajjad Sung Bok Seo Jianxiang Chen Sangwan Sim School of Electrical Engineering Hanyang UniversityAnsanSouth Korea Seoul Center Korea Basic Science InstituteSeoulSouth Korea Nottingham Ningbo China Beacons of Excellence Research and Innovation Institute University of NottinghamNingboChina Key Laboratory of Carbonaceous Wastes Processing and Process Intensification Research of Zhejiang Province University of Nottingham Ningbo ChinaNingboChina

In cutting-edge optical technologies,polarization is a key for encoding and transmitting vast information,highlighting the importance of selectively switching and modulating polarized ***,anisotropic two-dimensional materials have emerged for ultrafast switching of polarization-multiplexed optical signals,but face challenges with low polarization ratios and limited spectral ***,we apply strain to quasi-one-dimensional layered ZrSe_(3)to enhance polarization selectivity and tune operational energies in ultrafast all-optical ***,transient absorption on unstrained ZrSe_(3)reveals a sub-picosecond switching response in polarization along a specific crystal axis,attributed to shifting-recovery dynamics of an anisotropic ***,its polarization selectivity is weakened by a slow non-excitonic response in the perpendicular *** overcome this limitation,we apply strain to ZrSe_(3)by bending its flexible *** compressive strain spectrally decouples the excitonic and nonexcitonic components,doubling the polarization selectivity of the sub-picosecond switching and tripling it compared to that in the tensile-strained ZrSe_(3).It also effectively tunes the switching energy at a shift rate of~93 meV%-*** strain-tunable switching is repeatable,reversible,and robustly maintains the sub-picosecond ***-principles calculations reveal that the strain control is enabled by momentum-and band-dependent modulations of the electronic band structure,causing opposite shifts in the excitonic and non-excitonic *** findings offer a novel approach for high-performance,wavelength-tunable,polarization-selective ultrafast optical switching.

关键词： polarization tunable strain

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Hepatic cyst misdiagnosed as a gastric submucosal tumor:A case report

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World Journal of Gastroenterology 2008年第19期14卷 3092-3094页

作者： Joong-Min Park Jin Kim ho-Il Kim Chong-suk Kim Department of Surgery Korea University College of Medicine

We describe here a case of 51-year-old woman with a symptomatic hepatic cyst that was misdiagnosed as a gastric submucosal tumor (SMT) with endoscopic ultrasound (EUS) and CT scan. The patient presented with an epigastric pain for two months. On endoscopy, a submucosal tumor was found on the cardia of the stomach. Based on EUS and abdominal CT scan, the lesion was diagnosed as a gastric duplication cyst or a gastrointestinal stromal tumor (GIST). The operative plan was laparoscopic wedge resection for the GIST of the gastric cardia. A cystic mass arising from the left lateral segment of the liver was found at the laparoscopic examination. There was no abnormal finding at the gastric cardia. She was treated by laparoscopic hepatic wedge resection including the hepatic cyst using an endoscopic linear stapler.

关键词： Hepatic cyst Submucosal tumor Stomach

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Comparison of postpolypectomy bleeding between epinephrine and saline submucosal injection for large colon polyps by conventional polypectomy:A prospective randomized,multicenter study

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World Journal of Gastroenterology 2007年第21期13卷 2973-2977页

作者： Suck-ho Lee Il-Kwun Chung Sun-Joo Kim Jin-Oh Kim Bong-Min Ko Won-ho Kim Hyun-Soo Kim Dong-IL Park Hyo-Jong Kim Jeong-Sik byeon suk-Kyun Yang byeong Ik Jang Sung-Ae Jung Yoon-Tae Jeen Jai-Hyun Choi Hwang Choi Dong-Soo Han Jae suk Song Department of Internal Medicine University of Soonchunhyang at CheonanCheonan & Seoul & BucheonRepublic of Korea Department of Internal Medicine University of Yonsei at SeoulSeoul & WonjuRepublic of Korea Department of Internal Medicine University of Sungkyunkwan at SeoulSeoulRepublic of Korea Department of Internal Medicine University of Kyunghee at SeoulSeoulRepublic of Korea Department of Internal Medicine University of Ulsan at SeoulSeoulRepublic of Korea Department of Internal Medicine University of Youngnam at TaeguTaeguRepublic of Korea Department of Internal Medicine University of Ewha at SeoulSeoulRepublic of Korea Department of Internal Medicine University of Korea at SeoulSeoul & AnsanRepublic of Korea Department of Internal Medicine University of Catholic at BucheonBucheonRepublic of Korea Department of Internal Medicine University of Hanyang at KuriKuriRepublic of Korea Department of Preventive Medicine University of KwandongKangneungRepublic of Korea

AIM:To evaluate and compare the clinical outcomes of prophylactic submucosal saline-epinephrine injection and saline injection alone for large colon polyps by conventional polypectomy. METhoDS:A prospective study was conducted from July 2003 to July 2004 at 11 tertiary endoscopic centers. Large colon polyps (> 10 mm in diameter) wererandomized to undergo endoscopic polypectomy with submucosal saline-epinephrine injection (epinephrine group) or normal saline injection (saline group). Endoscopic polypectomy was performed by the conventional snare method,and early ( 2 cm) and neoplastic polyps were independently and significantly associated with the presence of PPB. CONCLUSION:The prophylactic submucosal injection of diluted epinephrine does not appear to provide an additional advantage over the saline injection alone for the prevention of PPB.

关键词： Colonoscopic polypectomy Bleeding submucosal injection Saline Epinephrine

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SPAD Value Difference between Blueberry Cultivar ‘STAR’ by Planted Ground and Pot

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Phyton-International Journal of Experimental Botany 2022年第11期91卷 2583-2590页

作者： Gyung Deok Han Dae ho Jung Seong Heo Yong suk Chung Department of Plant Resource and Environment Jeju National UniversityJeju63234Korea Division of Smart horticulture Yonam CollegeCheonan31005Korea Department of horticulture Kongju National UniversityYesan32439Korea

In the smart farm,we can control every detail for *** every factor that affects the crop’s final yield is necessary to optimize its *** SPAD values were observed in the‘Star’cultivar blueberry(Vaccinium darrowii)three times a day and at three different plant *** pattern of SPAD value change was different by the planting *** planted blueberry(***)represented a stable SPAD value during the day and at the different ***,the SPAD value was increased by time in pot-planted blueberry(***).Also,the SPAD value of pot-planted blueberry was lower than ground planted blueberry(***).Even when plants were of the same cultivar and age,planting conditions affected the changing pattern of SPAD in a *** planting condition had ***,proper management is needed to compensate SPAD value in pot-planted blueberry(***).This study suggests that environmental conditions like planting factors affect the final ***,to maximize the efficiency at the smart farm,the factors that could affect the final yield should be investigated and accumulated.

关键词： Cultivation chlorophyll fruit greenhouse light smart farm

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