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AERMOD를 이용한 축산 미세먼지, 초미세먼지, 암모니아 배출의 대기확산 영향도 분석
이세연 ( Lee¸ Se-yeon ),박진선 ( Park¸ Jinseon ),정한나 ( Jeong¸ Hanna ),최락영 ( Choi¸ Lak-yeong ),홍세운 ( Hong¸ Se-woon ) 한국농공학회 2021 한국농공학회논문집 Vol.63 No.5
The particulate matters (PM<sub>10</sub> and PM<sub>2.5</sub>) and ammonia emitted from livestock farms as dispersed to urban and residential areas can increase the public’s concern over the health problem, social conflicts, and air quality. Understanding the atmospheric dispersion of such matters is important to prevent the problems for the regulatory purposes. In this study, AERMOD modeling was performed to predict the dispersion of livestock particulate matters and ammonia in Gwangju metropolitan city and five surrounding cities. The five cities were divided into 40 sub-zones to model the area-based emissions which varied with the number of livestock farms, species and growth stages of the animals. As a result, the concentrations of PM<sub>10</sub>, PM<sub>2.5</sub> and ammonia resulted from livestock farms located in the surrounding cities were 2.00 μg m-3, 0.30 μg m-3 and 0.04 ppm in the southwestern part of Gwangju based on the average concentration of 1 hour. These values accounted for 0.7% of PM<sub>10</sub> concentration, 0.5% of PM<sub>2.5</sub> concentration, and 0.4% of the ammonia concentration in Gwangju, contributing to a small amount of air pollution compared to other sources. As preventive measures, the plantation was applied to high emission source areas to reduce particulate matters and ammonia emissions by 35% and 31%, respectively, and resulted in decrease of the area of influence by 57% for particulate matters and 59% for ammonia.
Serological study of canine H3N2 influenza virus in dogs in 2016 - 2017, Korea
Seyeon Park(Seyeon Park),In-Ohk Ouh(In-Ohk Ouh),Ju-Yeon Lee(Ju-Yeon Lee),Min-Su Cho(Min-Su Cho),Byeong Sul Kang(Byeong Sul Kang),Soo dong Cho(Soo dong Cho),Jae Young Song(Jae Young Song) 한국예방수의학회 2017 한국예방수의학회 학술대회자료집 Vol.2017 No.-
Isolation and phylogenetic analysis of swine influenza A viruses (H1N2) in Korea in 2016 - 2017
Seyeon Park(Seyeon Park),In-Ohk Ouh(In-Ohk Ouh),Ju-Yeon Lee(Ju-Yeon Lee),Min-Su Cho(Min-Su Cho),Byeong Sul Kang(Byeong Sul Kang),Soo dong Cho(Soo dong Cho),Eun-Ju Kim(Eun-Ju Kim),Yeun-Kyung Shin(Yeun- 한국예방수의학회 2017 한국예방수의학회 학술대회자료집 Vol.2017 No.-
Serological study of swine influenza A viruses in pig population in 2016 - 2017, Korea
Seyeon Park(Seyeon Park),In-Ohk Ouh(In-Ohk Ouh),Ju-Yeon Lee(Ju-Yeon Lee),Min-Su Cho(Min-Su Cho),Byeong Sul Kang(Byeong Sul Kang),Soo dong Cho(Soo dong Cho),Eun-Ju Kim(Eun-Ju Kim),Yeun-Kyung Shin(Yeun- 한국예방수의학회 2017 한국예방수의학회 학술대회자료집 Vol.2017 No.-
Seyeon Park,Ju-Yeon Lee,Jae Young Song,Soo-dong Cho,Jienny Lee,Bang-hun Hyun,In-Ohk Ouh 한국예방수의학회 2019 예방수의학회지 Vol.43 No.4
Viral protein 2 (VP2) of porcine parvovirus (PPV) is responsible for inducing neutralizing antibodies in immunized animals. It is the major viral structural protein. In this study, novel subunit vaccines against PPV based on virus-like particles (VLPs) formed from VP2 proteins (PPV 13-7 Korean strain) were expressed in an insect baculovirus cell system and purified using Ni-NTA affinity column chromatography. These VP2 proteins assembled into virus-like particles (VLPs). They showed antigenic properties similar to those of natural PPV. In addition, they showed high hemagglutination (HA) titers (2¹¹ for PPV 13-7 Korean strain). This study provides a foundation for the application of the difference immunization of recombinant protein in the diversity of PPV VP2 genes and in vaccination against PPV in the future.
Persistent Current Mode Operation of A 2G HTS Coil With A Flux Pump
Seyeon Lee,Woo-Seok Kim,Yungil Kim,Ji-Yung Lee,Sang-Ho Park,Ji-Kwang Lee,Gye-Won Hong,Sungsoo Kim,Jinho Han,Young Jin Hwang,Kyeongdal Choi Institute of Electrical and Electronics Engineers 2016 IEEE transactions on applied superconductivity Vol.26 No.4
<P>A flux pump is a kind of power source that energizes superconducting magnets usually embedded in the cryogenic system. Therefore, heat loss through current leads is eliminated, allowing for more efficient cooling design. A winding technique, the so-called 'wind-and-flip,' had been proposed by the authors to realize a jointless HTS coil for a perfect resistanceless closed loop, which may enable to induce a persistent current in an HTS coil wound with second-generation HTS tape. In this paper, we investigated charging/discharging characteristics and a possibility of persistent current operation of a jointless HTS coil with a flux pump. Results are discussed with regard to current capacity and temporal stability with a prototype jointless HTS coil.</P>
Design of HTS Toroidal Magnets for a 5 MJ SMES
Seyeon Lee,Kyung-Pyo Yi,Sang Ho Park,Ji-Kwang Lee,Woo-Seok Kim,Chan Park,Joon-Han Bae,Ki-Chul Seong,Ilhan Park,Kyeongdal Choi,Songyop Hahn IEEE 2012 IEEE transactions on applied superconductivity Vol.22 No.3
<P>A 2.5 MJ Superconducting Magnetic Energy Storage System (SMES) is being developed as a national R&D project in Korea. It is in 2nd phase of total 3 phases program. In phase 1, we developed a 600 kJ SMES which had the maximum storage over 1 MJ. Its magnet was an HTS solenoid, whereas the HTS magnet for phase 2 is a toroid which is composed of 28 HTS double pancake coils. The final target of phase 3 is to develop a 5 MJ SMES, which will start from next year. The operating temperature of the HTS magnet will be below 20 K by conduction cooling. In this paper, we present and compare conceptual designs of the magnet in the shape of toroid and the configuration of serial connection of two 2.5 MJ toroids. The most important design criterion is to minimize the total length of HTS conductors.</P>
Seyeon Kim, Jun-Pil Jee, Joon Hee Hong 조선대학교 기초과학연구원 2015 조선자연과학논문집 Vol.8 No.2
Novel 2'(β)-fluoro-3'(α)-hydroxy-threose nucleosides (iso-FMAU) as antiviral agents were designed and racemically synthesized from Solketal. Condensation successfully proceeded from a glycosyl donor 9 under Vorbrüggen conditions yielded the nucleoside analogues. Ammonolysis and hydrolysis of isopropylidene protection group gave the desired nucleoside analogues 12, 15, 18, and 19. The antiviral activities of the synthesized compounds were evaluated against the HIV-1, HSV-1, HSV-2 and HCMV. Compound 12 displayed some anti-HCMV activity (EC50=24.7 μg/ml) without exhibiting any cytotoxicity up to 100 μM.
Methodology for Evaluation of Fracture Resistance of Irradiated Cladding Under Pinch Load
Seyeon Kim,Sanghoon Lee 한국방사성폐기물학회 2023 한국방사성폐기물학회 학술논문요약집 Vol.21 No.2
The Spent Nuclear Fuel (SNF) cladding serves as the first barrier that prevents the release of radioactive materials. It is very important to maintain cladding integrity in SNF management. It is known that the pinch load applied to the cladding can lead to Mode-3 failure and the cladding becomes more vulnerable to this failure mode with the existence of radial hydrides and other forms of mechanical defects. In this study, a numerical analysis process was proposed to scientifically and systematically evaluate the fracture resistance of cladding with reoriented hydrides under pinch load. The mechanical behavior and fracture of the irradiated cladding under pinch load can be evaluated by Ring Compression Test (RCT). Under the stress field generated by RCT, the cracks propagate more easily through radial hydrides than circumferential hydrides. The δ-hydride which form within the α-zirconium matrix causes a large expansion strain due to the volume difference and voids form at the interface between the hydride and the zirconium matrix. Chan demonstrated that the load needed to form voids and separate the hard hydride precipitates from the Zr matrix is considerably lower than that which initiates brittle fracture of hydrides using a micro-cantilever test. Therefore, we propose a microstructure crack propagation analysis method based on Continuum Damage Mechanics (CDM) that can simulate fracture of hydride, zirconium matrix, and Zr/hydride interface. CDM is possible to simulate the hydride, zirconium matrix, and interface cracking in a continuum model based on cladding deformation. The RCT simulation model was constructed from the microscopic images of irradiated cladding. A pixel-based finite element model was created by separating the hydride, zirconium matrix, and interface using the image segmentation method on a morphology operation basis. The appropriate element size was selected for the efficiency of the analysis and crack propagation using CDM. The force-displacement curves and strain energy from RCT were compared and analyzed with the simulation results of different element sizes. The finalized RCT simulation model can be used to evaluate the fracture resistance of the irradiated cladding under the quantified pinch load and to establish the failure criterion of fuel rods under pinch load. The advantages and limitations of the proposed process are discussed.