A5101496593- Semiconductor materials and devices
- Gastric Cancer Management and Outcomes
- Helicobacter pylori-related gastroenterology studies
- Gastrointestinal motility and disorders
- Gastroesophageal reflux and treatments
- Ferroelectric and Piezoelectric Materials
- Metastasis and carcinoma case studies
- Eosinophilic Esophagitis
- Semiconductor materials and interfaces
- Esophageal and GI Pathology
- Copper Interconnects and Reliability
- Gastrointestinal Tumor Research and Treatment
- Gastrointestinal disorders and treatments
- Electronic and Structural Properties of Oxides
- Liver Disease Diagnosis and Treatment
- Pancreatitis Pathology and Treatment
- Ferroelectric and Negative Capacitance Devices
- Acoustic Wave Resonator Technologies
- Metal and Thin Film Mechanics
- Cholangiocarcinoma and Gallbladder Cancer Studies
- Gallbladder and Bile Duct Disorders
- Colorectal Cancer Screening and Detection
- Pediatric Hepatobiliary Diseases and Treatments
- Pancreatic and Hepatic Oncology Research
- Diverticular Disease and Complications
Pusan National University
2022
Kyungpook National University Hospital
2021
Kyungpook National University
2012-2021
National Institute of Animal Science
2021
Hoseo University
2020
Yonsei University
2005-2015
Hanyang University
2015
Gangnam Severance Hospital
2004-2013
Caesar Systems (United Kingdom)
2011
Center of Advanced European Studies and Research
2011
(Ba,Sr)TiO3 (BST) thin films with thicknesses ranging from 15 to 50 nm are prepared by a rf magnetron sputtering on Pt/SiO2/Si substrates. The dielectric constants of BST increase increasing deposition temperature and thicknesses. leakage current increases this prevents the 20 thick film being increased value more than 640 °C. is also critically dependent upon postannealing atmosphere after top electrode fabrication. constant which further reduces SiO2 equivalent films. A deposited at °C...
Electrical conduction mechanisms for Pt/(Ba0.5Sr0.5)TiO3 (BST)/Pt, IrO2/BST/IrO2, and Pt/BST/IrO2 capacitors were studied. The Pt/BST/Pt capacitor shows a Schottky emission behavior with interface potential barrier heights of about 1.5–1.6 eV. height is largely determined by the surface electron trap states BST. IrO2/BST an ohmic contact nature due to elimination as result formation strong chemical bonds between IrO2 BST which results in Poole–Frenkel mechanism. positive temperature...
The electrical conduction properties of rf sputter-deposited (Ba, Sr)TiO3 (BST) films on Pt and IrO2 electrodes metalorganic chemical vapor deposited (MOCVD) BST a electrode were investigated new energy band model that satisfactorily explains the observed leakage current characteristics film thickness dependent dielectric is proposed. junction constituted blocking contact with interface potential barrier heights 1.6–1.7 eV 1.2 for sputtered MOCVD films, respectively. Schottky emission...
Rifaximin has been reported to be effective for the treatment of hepatic encephalopathy (HE) in Europe.However, it is unknown whether HE Koreans, therefore we conducted a open-label prospective randomized study evaluate efficacy rifaximin versus lactulose Korean patients.Fifty-four patients with liver cirrhosis and were enrolled.Thirty-two receive 22 both over 7-day periods.Before at end treatment, gradation blood ammonia, flapping tremor, mental status, number connection test (NCT)...
The efficacy of proton-pump inhibitor-amoxicillin-clarithromycin therapy for H. pylori eradication has decreased over time.We assessed the trend rates last 10 years and relationship between amount macrolide antibiotic use in a country with high prevalence infection.This vast nationwide multicenter study was conducted 34,139 adults treated infection from January 2001 to December 2010. defined daily dose per km(2) (DSD) antibiotics calculated (n = 141,019) using Health Insurance Review &...
Postinfectiously irritable bowel syndrome (PI-IBS) develops in 3-30% of individuals with bacterial gastroenteritis. Recent studies demonstrated increases inflammatory components gut mucosa PI-IBS patients even after complete resolution infection. We aimed to investigate histological changes colon and rectum subjects long term period infection.We recruited who had been diagnosed IBS enteritis caused by shigellosis outbreak 3 years earlier. compared unmatched four groups, (n = 4), non 7),...
Changes in the pattern of gastrointestinal diseases a population tend to be influenced by changes diet and lifestyle. Shifts disease from 1995 2005 Korea were evaluated, retrospectively.Seventeen nationwide medical centers participated this study. The cross-sectional review endoscopic findings 28 893 patients included 8441 1995, 10 350 2000, 102 2005.The prevalence reflux esophagitis increased 1.8% 5.9% 2000 9.1% (P<0.001, P value was only for comparison between 2005, followings as same)....
Abstract Background Signet ring cell carcinoma (SRC) of the stomach is known to have different microscopic and biologic characteristics compared non‐SRC. The pathologic report has documented partly SRC component with main histologies. However, clinical significance mixture not been reported. Aim was investigate clinicopathologic features mixed‐SRC histology in early gastric cancer (EGC). Methods Two thousand two hundred eight patients were diagnosed EGC underwent surgery. divided into three...
This paper introduces a machine learning based copy-move forgery (CMF) localization method. The basic convolutional neural network cannot be applied to CMF detection because frequently involves rotation transformation. Therefore, we propose rotation-invariant feature on the root-mean squared energy using high-frequency wavelet coefficients. Instead of three color image channels, two-scale features and low-frequency subband are fed into conventional VGG16 network. A correlation module is used...
Irritable bowel syndrome (IBS) is a common disorder seen in general practice. Bacterial gastroenteritis has been known to be risk factor for IBS. We investigated the clinical course, factors, and prognosis of postinfectious IBS (PI-IBS) 5 years after Shigella infection.We recruited 153 individuals used questionnaire investigate their current habits. also looked presence other functional disorders (FBDs). The Shigella-exposed group consisted hospital employees medical students who experienced...
Human eye blinking is cognitively suppressed to minimize loss of visual information for important real-world events. Despite the relationship between and cognitive state, effect blinks on cognition in environments has received limited research attention. In this study, we focused temporal pattern inter-eye blink interval (IEBI) during movie watching investigated its with episodic memory. As a control condition, 24 healthy subjects watched nature documentary that lacked specific story line...
Collagen is the most excessive extracellular matrix protein in hepatic fibrosis. Activated, but not quiescent, stellate cells (HSCs) have a high level of collagen and smooth muscle actin (alpha SMA) expression. HSCs play key role pathogenesis We analyzed mechanism leading to HSC activation by evaluating oxidative stress expression NFkB. In vitro study were proliferated (PCNA:2% vs 68%) activated SMA: 5% 78%) ascorbate/FeSO4, type I blocked (PCNA: 97% 4%, 86% 9%) a-tocopherol. vivo means SMA...
Functional dyspepsia (FD) is defined as the presence of symptoms thought to originate in gastroduodenal area, absence any organic, systemic, or metabolic disease that likely explain symptoms. Based on available evidence and consensus opinion, thirteen statements for treatment FD were developed using modified Delphi approach. Proton pump inhibitor, prokinetics, histamine 2 receptor antagonists are effective FD. Mucosal protecting agents, fundus relaxant, drugs visceral hypersensitivity can...
Twelve patients with symptoms of acute cholecystitis underwent heavily T2-weighted and mangafodipir trisodium-enhanced T1-weighted magnetic resonance (MR) cholangiography cholescintigraphy before they cholecystectomy. On MR cholangiographic images, morphologic evidence outflow obstruction the gallbladder was definitive in seven patients, equivocal one, absent four. In all 12 biliary dynamics depicted at manganese-enhanced agreed completely those hepatobiliary scintigraphy. combined provides...
SrTiO 3 thin films with thicknesses ranging from 30 nm to 60 were grown on 6-inch-diameter, platinized Si wafers by liquid source metal-organic chemical vapor deposition (MOCVD). The crystalline quality and cation concentrations of the are strongly dependent temperature optimum temperatures 500° C 550° C. Semi-conformal submicron-sized storage node patterns is obtained but further improvements in conformality reproducibility required. dielectric constant about 210 irrespective film thickness...
Background/Aims Lactulose breath test (LBT) has been used as a presumptive surrogate marker for small intestinal bacterial overgrowth (SIBO). However, recent reports suggest that abnormal LBT cannot discriminate patients with irritable bowel syndrome (IBS) from the control. Thus, aim of this study was to evaluate usefulness in IBS. Methods 76 IBS patients, 70 functional disorders (FBD), and 40 controls were examined. considered positive if (1) baseline hydrogen (H2) >20 parts per million...
We performed this study to evaluate the prevalence of reflux esophagitis and/or hiatal hernia in patients referred a medical center and examine relationship between endoscopic hernia. The was carried out 1,010 Yong Dong Severance Hospital for upper gastrointestinal endoscopy because symptoms related tract from September 1994 March 1996. presence defined as circular extension gastric mucosa 2 cm or more above diaphragmatic hiatus. Reflux found 5.3% patients, 4.1%, duodenal ulcer 7.2% 8.2%....
The effects of plasma surface treatment, using N2O gas, Ba0.5Sr0.5TiO3 (BST) film on the leakage current characteristic a Pt/BST/Pt capacitor were investigated. As result exposure BST to plasma, density decreased by two orders magnitude in high voltage region, and higher onset an abrupt increase was observed. improvement properties films can be attributed elimination bulged curve characteristics. Thermal desorption spectroscopy showed that closely related reduction carbon content film.