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Soonil Kwon,Jin-Hyung Jung,Eue-Keun Choi,Seung-Woo Lee,Jiesuck Park,So-Ryoung Lee,Jeehoon Kang,Kyungdo Han,Kyung Woo Park,Seil Oh,Gregory Y. H. Lip 대한심장학회 2021 Korean Circulation Journal Vol.51 No.5
Background and Objectives: Antithrombotic therapy after percutaneous coronary intervention (PCI) in patients with atrial fibrillation (AF) has changed in recent years with new data from large randomized trials and updates to clinical guidelines. This study aimed to investigate the trends in periprocedural antithrombotic regimens in Korean patients with AF undergoing PCI with non-vitamin K antagonist oral anticoagulants (NOACs). Methods: Using the claims database of the Health Insurance Review and Assessment during 2013–2018, 27,594 patients with AF undergoing PCI were identified. The annual prevalence of PCI and prescriptions of each antithrombotic agent, including antiplatelet agents and oral anticoagulants, within 30 days after PCI were investigated. Results: During 2013–2018, the number of patients with AF undergoing PCI increased up to 1.3-fold (from 3,913 to 5,075 patients per year). After the introduction of NOACs, the proportion of dual antiplatelet therapy (DAPT) decreased from 71.9% to 49.8% but still occupied the largest proportion among antithrombotic regimens. Triple antithrombotic therapy (TAT) use increased from 25.4% to 46.0%, and NOAC has rapidly replaced warfarin as the oral anticoagulant of choice. TAT was preferred to DAPT for patients with CHA2DS2-VASc score ≥2. Among various factors, prior intracranial hemorrhage was the most powerful predictor of favoring DAPT use over TAT. Conclusion: Since the introduction of NOACs, the patterns of periprocedural antithrombotic regimens have changed rapidly toward more use of TAT, specifically with NOAC-based regimen. Appropriate stroke prevention with oral anticoagulants is still underutilized in patients with AF undergoing PCI in Korea.
Beef Carcass Yield Estimation Using 3D Reconstruction From Structured Light and Multi-view Geometry
( Collins Wakholi ),( Kyungdo Kwon ),( Changyeun Mo ),( Wang-hee Lee ),( Byoung-kwan Cho ) 한국농업기계학회 2018 한국농업기계학회 학술발표논문집 Vol.23 No.1
Reconstruction of 3D models from real objects is gaining popularity in computer vision and graphics nowadays. This is because it has numerous applications in areas such as industrial inspection, autonomous driving, reverse engineering, multimedia. However, 3D reconstruction is complex and often limited by factors such as sensor specifications, computer resources and expertise. While much efforts have been done to refine the reconstruction algorithms, not much has been done to optimize the scanning technologies. Advances in 3D scanning technology have introduced new techniques to obtain depth information from a scene such as multi-view geometry, structured light and laser scanning. Obtaining 3D information using structured light scanning is become popular because of its precision while using multi-view geometry is relatively low cost but still lacks in accuracy. Since all 3D scanning methods have advantages, the pursuit for accurate resultant 3D models at low cost calls for integration of the scanning technologies. This study therefore aims to develop a 3D system using 1) multi-view structured light scanning, MVSLS and 2) multiple view geometry for accurate beef carcass yield estimation. For the MVSLS-based system, a trinocular system (involving two cameras matched to a single projector) was used and a 360-degree scan of the samples was done in intervals of 45 degrees. The multiple view photogrammetry-based 3D scanning system employed two cameras and independent light sources to capture a 360-degree scan of the samples in intervals of 10 degrees. Using multi-view reconstruction algorithms and data from both setups, point clouds were obtained from matched features that were reconstructed into visual 3D models. Evaluation and comparison of the developed models was done based on the accuracy of volume estimation and reproduction of planar surface texture. The 3D model from best method was selected to estimate the volume and subsequently weight and price of the beef carcass. This study serves as a precursor to the development of a real-time beef carcass yield estimation method for industrial use.
최형(Hyung Choi),장경도(Kyungdo Jang),권상일(Sangil Kwon) 한국자기학회 1995 韓國磁氣學會誌 Vol.5 No.1
We introduced and compared the two methods, 'figure-8 coil method' and 's-parameter method', to measure high frequency permeability of magnetic films. We made a permeameter by using s-parameter method and discussed about problems and solutions in measuring permeability. We can measure the permeability rapidly and exactly up to 200 ㎒ with the aid of computer program and the low level permeance detection limit is about 1 ㎛.
Kim, Mee Kyoung,Han, Kyungdo,Koh, Eun Sil,Kim, Hun-Sung,Kwon, Hyuk-Sang,Park, Yong-Moon,Yoon, Kun-Ho,Lee, Seung-Hwan American Heart Association 2017 Arteriosclerosis, thrombosis, and vascular biology Vol.37 No.10
<P>Conclusions-Increasing TC variability was associated with an increasing incidence of ESRD. Visual Overview-An online visual overview is available for this article.</P>
Kim, Yang-Hyun,Han, Kyungdo,Son, Jang-Won,Lee, Seong-Su,Oh, Sang Woo,Kwon, Hyuk-Sang,Shin, Soon-Ae,Kim, Yeon-Yong,Lee, Won-Young,Yoo, Soon Jib Korean Society for the Study of Obesity 2017 Journal of obesity & metabolic syndrome Vol.26 No.1
<P><B>Background</B></P><P>In Korea, the prevalence of obesity has steadily increased, and the socioeconomic burden of obesity has increased along with it. In 2015, the National Health Insurance Service (NHIS) signed a memorandum of understanding with the Korean Society for the Study of Obesity (KSSO), providing limited open access to its databases so that the status of obesity and obesity management could be investigated.</P><P><B>Methods</B></P><P>Using NHIS databases, we analyzed nationwide population-based studies for obesity using the definition of obesity (body mass index ≥25 kg/m<SUP>2</SUP>) in subjects over the age of 20. Age and sex standardization were used for all data.</P><P><B>Results</B></P><P>The KSSO released the ‘Obesity Fact Sheet 2016’ using the 2006–2015 NHIS Health Checkup database. The prevalence of obesity steadily increased from 28.7% in 2006 to 32.4% in 2015, and the prevalence of abdominal obesity also steadily increased from 18.4% in 2009 to 20.8% in 2015. The prevalence of class II obesity steadily increased from 2006 to 2015, such that the total prevalence was 4.8% in 2015 (5.6% in men and 4.0% in women). The highest prevalence of obesity was found in Jeju Island, while the lowest prevalence was found in Daegu City. The highest prevalence of abdominal obesity was also found in Jeju Island, while the lowest prevalence was found in Gwangju City.</P><P><B>Conclusion</B></P><P>Based on the Obesity Fact Sheet 2016, a strategy for reducing the prevalence of obesity is needed, especially in Korean men.</P>
Seo, Mi Hae,Kim, Yang-Hyun,Han, Kyungdo,Jung, Jin-Hyung,Park, Yong-Gyu,Lee, Seong-Su,Kwon, Hyuk-Sang,Lee, Won-Young,Yoo, Soon Jib Korean Society for the Study of Obesity 2018 Journal of obesity & metabolic syndrome Vol.27 No.1
<P><B>Background</B></P><P>The prevalence of obesity and related comorbidities is increasing worldwide, including in Korea. The Korean Society for the Study of Obesity released the Obesity Fact Sheet 2017 to address this problem in the Korean population.</P><P><B>Methods</B></P><P>Data from the National Health Insurance Service Health Checkup database from 2006 to 2015 were standardized by age and sex using the 2010 Census. The definition of obesity was a body mass index (BMI) ≥25 kg/m<SUP>2</SUP>, and that of abdominal obesity was a waist circumference ≥90 cm in men and ≥85 cm in women. Multivariate adjusted Cox regression analysis was conducted, and hazard ratios (HRs) with 95% confidence intervals were calculated for comorbidities.</P><P><B>Results</B></P><P>From 2009 to 2015, the prevalence of obesity increased from 29.7% to 32.4%, and that of abdominal obesity increased from 18.4% to 20.8%. Obesity with abdominal obesity also increased from 15.1% to 17.7%. Between 2014 and 2015, the prevalence of obesity increased until 30–40 years of age, but decreased from 40–50 years of age in men. In women, it increased until the mid-70s, and decreased thereafter. Abdominal obesity increased from 20–30 years of age to 70–80 years of age, but decreased thereafter. The HRs for type 2 diabetes mellitus, hypertension, dyslipidemia, myocardial infarction, and ischemic stroke were elevated in subjects with abdominal obesity, and their incidence increased as the BMI increased, but slowed down at BMI ≥35 kg/m<SUP>2</SUP>.</P><P><B>Conclusion</B></P><P>Based on the Obesity Fact Sheet 2017, strategies for reducing the prevalence of obesity and abdominal obesity are essential.</P>