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Stroke & Vascular Neurology 2024年第5期9卷 560-567页

作者： Minyoul Baik Jimin Jeon Jinkwon Kim Joonsang yoo Department of Neurology Yongin Severance HospitalYonsei University College of MedicineYongin-siGyeonggi-doKorea(the Republic of)

Introduction Stent-assisted coil embolisation(SACE)for the treatment of unruptured cerebral aneurysms has been increasingly ***-term advantages of antiplatelet therapy(APT)post-SACE treatment are still not well *** investigated the long-term effects of APT on clinical prognosis after *** and methods We conducted a retrospective study using nationwide health insurance claims data from South Korea,including patients with cerebral aneurysm treated with SACE from January 2009 to December *** study outcomes consisted of the occurrence of cerebral infarction and major *** evaluate the impact of APT,we employed a multivariable time-dependent Cox proportional hazards regression model for each of the three distinct periods:1–12 months,12–24 months and>24 months after *** This study included 17692 unruptured cerebral aneurysm patients treated with *** the mean follow-up of 4.2 years,there were 379(2.1%)patients with cerebral infarction and 190(1.1%)patients with major *** percentage of patients receiving APT was 79.5%at 1year,which gradually decreased to 58.3%at 2 years after *** was beneficial in preventing cerebral infarction within 12 months after SACE(adjusted HR(aHR)0.56;95%CI,0.35 to 0.89;p=0.014).After 12 months,this association was not *** increased the risk of haemorrhage after 24 months(aHR 1.76;95%CI 1.11 to 2.87;p=0.016).Discussion and conclusion Our findings suggest that in patients with unruptured cerebral aneurysm treated with SACE,the reasonable duration of APT for preventing cerebral infarction might be 1year after SACE.

关键词： cerebral aneurysm nationwide

Error resilient concurrent video streaming over wireless mesh networks

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2006年第5期7卷 684-695页

作者： CHUAH Chen-nee yoo Ben S.J. Electrical and Computer Engineering Department University of California Davis 95616 USA Electrical and Computer Engineering Department

In this paper, we propose a multi-source multi-path video streaming system for supporting high quality concurrent video-on-demand (VoD) services over wireless mesh networks (WMNs), and leverage forward error correction to enhance the error resilience of the system. By taking wireless interference into consideration, we present a more realistic networking model to capture the characteristics of WMNs and then design a route selection scheme using a joint rate/interference-distortion optimiza- tion framework to help the system optimally select concurrent streaming paths. We mathematically formulate such a route selec- tion problem, and solve it heuristically using genetic algorithm. Simulation results demonstrate the effectiveness of our proposed scheme.

关键词： Wireless mesh network, Concurrent video streaming, Interference

Gallbladder lymphangioma:A case report and review of the literature

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World Journal of Gastroenterology 2007年第2期13卷 320-323页

作者： Jwa-Kyung Kim Kyo-Sang yoo Joon Ho Moon kwang Hyuk Park Yong Woo Chung Kyoung Oh Kim Cheol Hee Park Taeho Hahn Sang Hoon Park Jong Hyeok Kim Jang Yeong Jeon Min Jung Kim kwang Seon Min Department of Pathology Hallym University College of Medicine Anyang Korea Choong Kee Park Department of Gastroenterology and Hepatology Hallym University College of Medicine Anyang Korea Department of Surgery Hallym University College of Medicine Anyang Korea Department of Diagnostic Radiology Hallym University College of Medicine Anyang Korea

Lymphangiomas are rare, benign tumors of the lymphatic system, usually present in children aged 5 years and younger. Because they are asymptomatic until the mass enlarges to cause symptoms, most lymphangiomas are diagnosed at adulthood incidentally. We experienced a case of a 60-year-old man diagnosed with a cystic lymphangioma of the gallbladder, which was successfully resected without any complication. Magnetic resonance imaging and magnetic resonance cholangiopancreatography were very helpful for the diagnosis of the cystic lesion around the gallbladder as were ultrasonography and computed tomography scan. These showed a multi-lobulated cystic mass with intact cystic duct and bile duct in the gallbladder fossa. The patient underwent an open cholecystectomy and the histological findings were consistent with a cystic lymphangioma of the gallbladder. We here report the case of cystic lymphangioma of the gallbladder with a review of the literature.

关键词： Lymphangioma Gallbladder Cholecystectomy

Slip-enhanced Reverse Electrodialytic Power Generation in Ion-selective Nanochannels

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Journal of Thermal Science 2013年第1期22卷 36-41页

作者： Byeongdong Kang Jaisuk yoo Hyun Jung Kim Dong-Kwon Kim Department of Mechanical Engineering Ajou University

Power generation by reverse electrodialysis in ion-selective nanochannels is numerically investigated. Especially,in the present study, the influence of hydrodynamic slip at the surface of nanochannels is investigated. The current-potential characteristics of the nanochannels are calculated by solving several governing equations:Nernst-Planck equation for the ionic concentrations, the Poisson equation for the electric potential, and the Navier-Stokes equation for the diffusioosmotic flow. Hydrodynamic slip is applied as the boundary condition at the surface of nanochannels. As the slip length increases, the diffusioosmotic flow velocity and electrical conductance of ions increase because the friction at the surface of nanochannels decreases. It is shown that the power generation is enhanced by 44% with a moderate 100nm slip length by using a nanochannel with 10nm height.

关键词： Reverse electrodialysis Ion-selective nanochannel Power generation Slip length

Less common neoplasms of the pancreas

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World Journal of Gastroenterology 2006年第20期12卷 3180-3185页

作者： Abby L Mulkeen Peter S yoo Charles Cha Department of Surgery Yale University School of Medicine New HavenCT and the VACT Healthcare SystemWest HavenCT330 Cedar StreetLH 118PO Box 208062New HavenCT06520-8062United States

Recently, there has been an increased recognition of neoplasms of the pancreas other than ductal adenocarcinorna. Although not as well studied or characterized as pancreatic adenocarcinorna there are many distinct lesions which exhibit diverse biological behaviors and varying degrees of malignancy. These lesions include： endocrine neoplasms, cystic tumors, solid pseudopapillary tumors, acinar cell carcinoma, squamous cell carcinoma, primary lymphoma of the pancreas, and metastatic lesions to the pancreas. These less common neoplasms are being diagnosed more frequently as the number and sensitivity of diagnostic imaging studies increase. This review article discusses the clinical course, diagnosis, and treatment of these less common, but quite relevant, neoplasms of the pancreas.

关键词： Pancreas Neoplasms Ductal adenocarcinoma

Association between statin therapy and the risk of stroke in patients with moyamoya disease:a nationwide cohort study

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Stroke & Vascular Neurology 2023年第4期8卷 276-283,I0010-I0021页

作者： Joonsang yoo Jimin Jeon Minyoul Baik Jinkwon Kim Department of Neurology Yongin Severance HospitalYonsei College of MedicineYongin-siKorea(the Republic of) Institute for Innovation in Digital Healthcare Yonsei UniversitySeoulKorea(the Republic of)

Background and objective Knowledge regarding the pharmacological treatment for moyamoya disease(MMD),a chronic and progressive cerebrovascular disease conferring greater stroke risk,is *** the present study,whether statin therapy is associated with a reduced risk of stroke in patients with MMD was *** This was a retrospective cohort study in which the occurrence of stroke in patients with newly diagnosed MMD was investigated using the nationwide health insurance database in Korea from January 2007 to March 2021.A multivariable Cox proportional hazards regression model was constructed for stroke,in which statin therapy after MMD diagnosis was treated as a time-dependent *** was done for sex,age,presence of comorbidities,concurrent stroke,revascularisation surgery and treatment with *** The present study included 13373 newly diagnosed patients with MMD;40.8%had a concurrent stroke at the time of MMD *** the mean follow-up of 5.1±3.3 years,631 patients(4.7%)suffered a stroke event(haemorrhagic stroke:458 patients,ischaemic stroke:173 patients).Statin therapy after MMD diagnosis was significantly associated with a reduced risk of stroke(adjusted HR 0.74;95%CI 0.60 to 0.91,p=0.004).In the secondary outcome analysis,the risk of haemorrhagic stroke(adjusted HR 0.74;95%CI 0.58 to 0.95,p=0.018)and ischaemic stroke(adjusted HR 0.75;95%CI 0.52 to 1.08,p=0.124)were reduced with the statin *** statins was also associated with a lower risk of all-cause mortality(adjusted HR 0.47;95%CI 0.33 to 0.67,p<0.001).Conclusion In patients with MMD,statin therapy was associated with a reduced risk of subsequent *** findings indicate statin treatment may be beneficial for patients with MMD,however the results should be confirmed in randomised controlled trials.

关键词： patients diagnosis nationwide

Properties of ZnO Thin Films Grown on Si (100) Substrates by Pulsed Laser Deposition

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Journal of Materials Science & Technology 2010年第11期26卷 973-976页

作者： Young Rae Jang Keon-Ho yoo Seung Min Park Department of Physics Kyung Hee University Department of Chemistry Kyung Hee University

ZnO thin films were grown on Si （100） substrates by pulsed laser deposition using a ZnO *** substrate temperature was varied in the range of room temperature to 800 ℃,and the oxygen partial pressure of 0.1333 Pa （1 m Torr） to 1333 Pa （10 Torr）.The properties of the resulting films were investigated by photoluminescence （PL）,grazing incidence X-ray diffraction （GIXRD）,X-ray photoelectron spectroscopy （XPS）,and field emission scanning electron microscopy （FESEM）.Based on the ultraviolet （UV,～380 nm） to visible emission ratio in the PL spectrum,the optimum growth conditions were determined to be 600 ℃ and 133.3 Pa （1 Torr）,*** oxygen 1s peak in the XPS spectrum was decomposed into two *** peak at lower binding energy increased in intensity with the oxygen partial pressure from 0.1333 Pa （1 m Torr） to 133.3 Pa （1 Torr） while the other peak *** GIXRD curve at the optimum condition showed strong two peaks （002） and （103）.A strong correlation between the （103） peak intensity and the UV emission intensity was found.

关键词： ZnO Pulsed laser deposition Photoluminescence

Effects of land use change and water reuse options on urban water cycle

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Journal of Environmental Sciences 2010年第6期22卷 923-928页

作者： Jiho Lee Gijung Pak Chulsang yoo Sangdan Kim Jaeyoung yoon School of Civil Environmentaland Architectural EngineeringKorea University Department of Environmental Engineering Korea University Department of Environmental System Engineering Pukyong National University

The aim of this article was to study the effects of land use change and water reuse options on an urban water cycle. A water cycle analysis was performed on the Goonja drainage basin, located in metropolitan Seoul, using the Aquacycle model. The chronological effects of urbanization were first assessed for the land uses of the Goonja drainage basin from 1975 to 2005, where the ratio of impervious areas ranged from 43% to 84%. Progressive urbanization was identified as leading to a decrease in evapotranspiration （29%）, an increase in surface runoff （41%） and a decrease in groundwater recharge （74%）, indicating a serious distortion of the water cycle. From a subsequent analysis of the water reuse options, such as rainwater use and wastewater reuse, it is concluded that wastewater reuse seemed to have an advantage over rainwater use for providing a consistent water supply throughout the year for a country like Korea. where the rainy season is concentrated during the summer monsoon.

关键词： Aquacycle model land use change water reuse

Integration of omics studies indicates that species-dependent molecular mechanisms govern male fertility

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Journal of Animal Science and Biotechnology 2023年第3期14卷 1026-1039页

作者： yoo-Jin Park Won-Ki Pang Myung-Geol Pang Department of Animal Science&Technology and BET Research Institute Chung-Ang UniversityAnseongGyeonggi‑do17546Republic of Korea

Background Comparative and comprehensive omics studies have recently been conducted to provide a comprehensive understanding of the biological mechanisms underlying ***,because these huge omics datasets often contain irrelevant information,editing strategies for summarizing and filtering the data are necessary prerequisite steps for identifying biomarkers of male ***,we attempted to integrate omics data from spermatozoa with normal and below-normal fertility from boars and bulls,including transcriptomic,proteomic,and metabolomic *** enrichment analysis was conducted and visualized using g:Profiler,Cytoscape,EnrichmentMap,and AutoAnnotation to determine fertility-related biological functions according to *** In particular,gamete production and protein biogenesis-associated pathways were enriched in bull spermatozoa with below-normal fertility,whereas mitochondrial-associated metabolic pathways were enriched in boar spermatozoa with normal *** results indicate that below-normal fertility may be determined by aberrant regulation of protein synthesis during spermatogenesis,and the modulation of reactive oxygen species generation to maintain capacitation and the acrosome reaction governs boar sperm *** Overall,this approach demonstrated that distinct molecular pathways drive sperm fertility in mammals in a species-dependent ***,we anticipate that searching for species-specific signaling pathways may aid in the discovery of fertility-related biomarkers within large omics datasets.

关键词： Integrated signaling pathways Male fertility Metabolomics Proteomics Spermatozoa transcriptomics

Nonlinear Optical Properties in a Quantum Dot of Some Polar Semiconductors

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Chinese Physics Letters 2013年第10期30卷 147-151页

作者： A.Azhagu Parvathi A.John Peter Chang Kyoo yoo Department of Physics VV Vanniaperumal College for WomenVirudhunagar-626001India Department of Physics Govt.Arts and Science CollegeMelur-625106MaduraiIndia Center for Environmental Studies/Green Energy Center Department of Environmental Science and EngineeringCollege of EngineeringKyung Hee UniversitySeocheon-dong 1Giheung-guYongin-SiGyeonggi-Do 446-701South Korea

Exciton binding energy,interband emission energy,oscillator strength,and some nonlinear optical properties in quantum dots made up of polar semiconductors are computed with the geometrical *** effects of the interaction of charge carriers with the longitudinal optical phonons on the exciton binding energy are *** anisotropy of the effective masses of holes is incorporated throughout the *** optical exciton absorption of Ⅱ–Ⅵ systems based on some polar semiconductors in the presence of LO phonons is *** optical rectification coefficient associated with the intersubband transitions in a quantum dot of polar semiconductors is *** of refractive index with the photon energy in a polar quantum dot are *** results show that the polar bound excitons in Ⅱ–Ⅵ based polar semiconductors depend on the geometrical confinement,and the nonlinear optical properties strongly depend on the polar materials.

关键词： materials Nonlinear semiconductors