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Can common carotid artery ultrasonography help in screening high-risk pregnant women?
( Moon Hye Yeon ),( Park Hyeon Ji ),( Jeon Hye Jin ),( Kwan Heup Song ),( Ho Yeon Kim ),( Geum Joon Cho ),( Ki Hoon Ahn ),( Soon Cheol Hong ),( Min Jeong Oh ),( Hai Joong Kim ) 대한산부인과학회 2022 대한산부인과학회 학술대회 Vol.108 No.-
Objective: Pregnancy at advanced maternal age has become more common in Korea. There are many studies between pregnancy induced complication such as pre-eclampsia, gestational diabetes mellitus (GDM) and advanced maternal age. Therefore, screening for high-risk pregnant women with pregnancy induced complications is important. Carotid intima-media thickness (CIMT) and peak systolic velocity (PSV) are well known indicators of atherosclerosis and cardiovascular disease. CIMT and PSV are affected by endothelial dysfunction and inflammation. This is similar to the mechanism that causes placental dysplasia and vascular disorders, leading to pregnancy induced complication. In this study, CIMT and PSV were compared between high-risk pregnant women and normal pregnant women. Methods: This study had been performed at Korea University Ansan Hospital between March 2019 and August 2022. All enrolled women measured CITM, PSV, and end-diastolic velocity by ultrasonography between 20 and 24 weeks of gestation. In addition, perinatal complications, clinical characteristics, delivery method, gestation age, birth weight of the fetus, neonatal intensive care unit administration, and Apgar score were compared among these pregnant women. Results: Maternal common carotid artery (CCA) IMT and PSV did not show a significant correlation with overt diabetes mellitus (DM) and GDM. However, pregnant women with pregnancy induced hypertensive disorder (PIH) showed decreased the PSV of CCA that compared to normal pregnant women. (p=value 0.043) In addition, CCA IMT showed a positive correlation with gestational age and birth weight. (p-value 0.02, 0.028 / r-value 0.277, 0.2262) Conclusion: In pregnant women with PIH, the PSV of CCA was decreased compared to normal pregnant women. This may help screening pregnant women who had high risk for PIH in the second trimester of pregnancy.
Complete Genome Analysis of Porcine Enterovirus B Isolated in Korea
Moon, Hyoung-Joon,Song, DaeSub,Seon, Bo Hyeon,Kim, Hye-Kwon,Park, Seong-Jun,An, Dong-Jun,Kim, Jong-Man,Kang, Bo-Kyu,Park, Bong-Kyun American Society for Microbiology 2012 Journal of virology Vol.86 No.18
<P>The complete genome sequence of porcine enterovirus B (PEV-B) from a Korean isolate was analyzed. The genome size was 7,393 bp. Previously, full genome sequences of PEV-B had been reported from the United Kingdom, Hungary, and China. The Korean PEV-B isolate presented polyprotein gene nucleotide sequence similarities of 77.9, 73.7, 78.9, and 80.3%, respectively, to PEV-B UKG/410/73, LP54, PEV15, and Chinese strains (Ch-ah-f1).</P>
Coupled Motion Simulation of the Mobile Harbor and Anti-Rolling Devices in Waves
Hyeon-Kyu Yoon,Joo-Nyun Kang,Jae-Moon Lew,Seok-Joon Moon,Tae-Young Chung 한국항해항만학회 2010 한국항해항만학회지 Vol.34 No.4
The Mobile Harbor(MH) is a new transportation platform that can load and unload containers to and from very large container ships in the sea. This loading and unloading by crane can be performed with only very small movements of the MH in waves because MH is operated outside of the harbor. For this reason, an anti-rolling tank(ART) and an active mass driving system(AMD) were designed to reduce MH’s roll motion, especially at the natural frequency of MH. In the conceptual design stage, it is difficult to confirm the design result of theses anti-rolling devices without modeling and simulation tools. Therefore, the coupled MH and anti-rolling devices’ dynamic equations in waves were derived and a simulation program that can analyze the roll reduction performance in various conditions, such as sea state, wave direction, and so on, was developed. The coupled equations are constructed as an eight degrees of freedom (DOF) motion that consists of MH’s six DOF dynamics and the ART's and AMD’s control variables. In order to conveniently include the ART’s and AMD’s control dynamics in the time domain, MH’s radiated wave force was described by an impulse response function derived by the damping coefficient obtained in the frequency domain, and wave exciting forces such as Froude-Krylov force and diffraction force and nonlinear buoyancy were calculated at every simulation time interval. Finally, the roll reduction performances of the designed anti-rolling devices were successfully assessed in the various loading and wave conditions by using a developed simulation program.