The Evolving Policy Debate on Border Closure in Korea

Su-Jin Kang,Jihyun Moon,Heewon Kang,Heekyoung Nam,Sangwoo Tak,Sung-Il Cho 대한예방의학회 2020 Journal of Preventive Medicine and Public Health Vol.53 No.5

302 Copyright © 2020 The Korean Society for Preventive Medicine J Prev Med Public Health 2020;53:302-306 • https://doi.org/10.3961/jpmph.20.213 The Evolving Policy Debate on Border Closure in Korea SuJin Kang1, Jihyun Moon2, Heewon Kang1, Heekyoung Nam3, Sangwoo Tak1, Sung-il Cho1,3 1Institute of Health and Environment, Seoul National University, Seoul, Korea; 2Samsung Advanced Institute of Health Science and Technology, Sungkyunkwan University, Seoul, Korea; 3Department of Public Health Sciences, Graduate School of Public Health, Seoul National University, Seoul, Korea Brief Report Objectives: In this paper, we aimed to investigate the evolving debate over border closure in Korea during the coronavirus disease 2019 (COVID-19) pandemic, to address the main themes associated with border closure, and to discuss the factors that need to be considered when making such decisions. Methods: We collated and reviewed previously conducted review studies on border closures during infectious disease outbreaks to derive relevant themes and factors. Results: According to our systematic review on border closures and travel restrictions, the effects of such containment efforts are limited. We suggest considering the following factors when determining whether to impose border closure measures: (1) disease characteristics, (2) timeliness of implementation, (3) transmission delay and the basic reproduction number, (4) globalization and pandemics, and (5) social and economic costs. Conclusions: Our assessment indicates that the effects of border closures are at best temporary and limited. Alternative measures must be contemplated and implemented to suppress the spread of COVID-19 in particular and infectious diseases more broadly.

STUDY ON THE CURRENT BLOCKING EFFECT INDUCED BY THE RESIDUAL SECONDARY PHASE MATERIALS IN THE Cu₂ZnSnSe₄ THIN FILM SOLAR CELLS

Jihyun Moon,Hye Rim Choi,Kihwan Kim,Jihye Gwak,Jae Ho Yun,Ara Cho,Young Ju Eo,Jun-Sik Cho,SeJin Ahn,Joo Hyung Park,Jin Su Yoo,Dahyun Nam,Hyeonsik Cheong,Kee Shik Shin,Kyung Hoon Yoon,Byungsung O,Seung 한국신재생에너지학회 2015 AFORE Vol.2015 No.11

Perspectives on immune checkpoint ligands: expression, regulation, and clinical implications

( Jihyun Moon ),( Yoo Min Oh ),( Sang-jun Ha ) 생화학분자생물학회 2021 BMB Reports Vol.54 No.8

In the tumor microenvironment, immune checkpoint ligands (ICLs) must be expressed in order to trigger the inhibitory signal via immune checkpoint receptors (ICRs). Although ICL expression frequently occurs in a manner intrinsic to tumor cells, extrinsic factors derived from the tumor microenvironment can fine-tune ICL expression by tumor cells or prompt non-tumor cells, including immune cells. Considering the extensive interaction between T cells and other immune cells within the tumor microenvironment, ICL expression on immune cells can be as significant as that of ICLs on tumor cells in promoting antitumor immune responses. Here, we introduce various regulators known to induce or suppress ICL expression in either tumor cells or immune cells, and concise mechanisms relevant to their induction. Finally, we focus on the clinical significance of understanding the mechanisms of ICLs for an optimized immunotherapy for individual cancer patients. [BMB Reports 2021; 54(8): 403-412]

Flow Velocity Change of David Glacier, East Antarctica, from 2016 to 2020 Observed by Sentinel-1A SAR Offset Tracking Method

( Jihyun Moon ),( Yuri Cho ),( Hoonyol Lee ) 대한원격탐사학회 2021 大韓遠隔探査學會誌 Vol.37 No.1

This study measures the change of ice flow velocity of David Glacier, one of the fast-moving glaciers in East Antarctica that drains through Drygalski Ice Tongue. In order to effectively observe the rapid flow velocity, we applied the offset tracking technique to Sentinel-1A SAR images obtained from 2016 to 2020 with 36-day temporal baseline. The resulting velocity maps were averaged and the two relatively fast points (A1 and A2) were selected for further time-series analysis. The flow velocity increased during the Antarctic summer (around December to March) over the four years’ observation period probably due to the ice surface melting and reduced friction on the ice bottom. Bedmap2 showed that the fast flow velocities at A1 and A2 are associated with a sharp decrease in the ice surface and bottom elevation so that ice volumetric cross-section narrows down and the crevasses are being created on the ice surface. The local maxima in standard deviation of ice velocity, S1 and S2, showed random temporal fluctuation due to the rotational ice swirls causing error in offset tracking method. It is suggested that more robust offset tracking method is necessary to incorporate rotational motion.

Professionalism, Job satisfaction, job stress and intention to retention of visiting nurses in Korea

Moon, JiHyun,Baek, HeeChong 한국간호과학회 2019 한국간호과학회 학술대회 Vol.2019 No.10

Influence of Na on Back Contact Properties of Solution-processed CISe Solar Cells

Jihyun Moon(문지현),Shanza Rehan(샨자 레한),Young-Joo Eo(어영주),Ara Cho(조아라),Jihye Gwak(곽지혜),Seung Kyu Ahn(안승규),Byunsung O(오병성),SeJin Ahn(안세진) 한국신재생에너지학회 2018 한국신재생에너지학회 학술대회논문집 Vol.2018 No.4

어머니의 자율성 지지가 유아의 정서적 유능성과 사회적 유능성에 미치는 영향

문지현(Jihyun Moon),신나나(Nana Shin) 한국아동학회 2017 아동학회지 Vol.38 No.6

Objective: The purpose of this study was to examine the relationships among maternal autonomy support, preschoolers’ executive function, and preschoolers’ emotional and social competence. In addition, the mediating role of preschoolers’ executive function between maternal autonomy support and preschoolers’ emotional and social competence was investigated. Methods: A total of 245 preschoolers (130 boys and 115 girls) and their mothers participated in this study. Data were collected through maternal reports. Results: First, maternal autonomy support was significantly related to preschoolers’ emotional and social competence. Second, maternal autonomy support was significantly related to preschoolers’ executive function. Third, preschoolers’ executive function was significantly related to emotional and social competence. Fourth, preschoolers’ executive function partially mediated the relationship between maternal autonomy support and preschoolers’ emotional and social competence. Conclusion: These results highlight the importance of executive function in attaining emotional and social competence during the preschool period.

ICT 시대의 창의적 정체성을 가진 한류 인재 양성을 위한 휴먼 브랜드 디자인 처방적 전략 제안 : 시각 아이덴티티 디자인 요소들의 심미적 인간성과 경험 브랜드 디자인 전략을 통한 통찰적 가이드 라인

문지현(Moon Jihyun) 한국IT서비스학회 2020 한국IT서비스학회 학술대회 논문집 Vol.2020 No.-

ICT 산업에서의 창의적 소양을 갖추고 한류를 이끄는 스타들의 성공 요인을 심미성에 기여한 시각 디자인 측면에서 살펴보고자 한다. 이를 위해, 기성 브랜드 디자인 전략 및 성공 요인을 비교 분석하여 창의적인 정체성을 가진 한류 인재 양성을 위한 휴먼 브랜드 디자인의 성공적인 필요 처방적 전략을 정립하고자 한다. 4차 산업 시대에서 단순하게 디자인이란 본래 물건의 본질, 혹은 목적성을 위한 도구로써의 역할을 넘어서 인간 중심적 측면에서 바라보고, 고도화된 ICT 사회 전반에 얽힌 구조적 특성으로 인간 사회 구조에서 양산되는 휴먼 콘텐츠에 대해서 고찰하고자 한다. 이로써, 특수 문화인들 뿐만 아니라, 누구나 한류를 목표로 자신의 꿈을 펼칠 수 있는 기초 자료로 활용되길 기대한다.

Sentinel-1 InSAR 긴밀도 영상을 이용한 3월5일청년광산의 지표 변화 탐지

문지현 ( Jihyun Moon ),김근영 ( Geunyoung Kim ),이훈열 ( Hoonyol Lee ) 대한원격탐사학회 2021 大韓遠隔探査學會誌 Vol.37 No.3

노천 채광을 수행하는 광산은 지표 변화와 환경 교란을 발생시킬 수 있기 때문에 지속적인 모니터링이 필요하다. 노천 광산은 채광 작업장에 식생이 거의 분포하지 않아 InSAR 긴밀도 영상을 이용한 모니터링이 가능하다. 본 연구는 최근 개발된 InSAR 긴밀도 영상 기반의 Normalized Difference Activity Index(NDAI)를 적용하여 광산에서 발생하는 활동을 분석하였다. 3월5일청년광산은 2008년 이후 본격적으로 개발이 확장된 북한의 광산이다. 3월5일청년광산을 촬영한 12일 간격의 Sentinel-1 SAR 영상을 이용하여 획득된 InSAR 긴밀도 영상으로 NDAI 분석을 진행하였다. 우선 2000년부터 약 14년간 발생한 75.24 m의 고도 하강 지역과 약 9.85 m의 고도 상승 지역을 채광 작업장 및 광미 적치장으로 정의하였다. 이후 NDAI 영상을 이용하여 기간별 활동 분석을 진행하기 위해 전체 기간의 평균 영상, 1년 단위의 평균 영상, 및 4개월 단위의 평균 영상을 제작하였다. 2017년부터 2019년까지 광산 활동은 평균적으로 채광 작업장의 중심에서 비교적 활발하였다. 보다 자세한 광산의 활동 변화를 확인하기 위해 시간 간격을 좁혀 1년간의 활동을 알아보고자 하였다. 2017년은 지진파 자료의 정보와 NDAI 영상을 이용하여 인공 지진의 발생 시점과 그 전후에 대하여 RGB 합성 영상을 제작하고 채광 작업장의 활동 변화를 분석하였다. 2017년 4월 30일 발생한 대규모 발파 이후 채광 작업장의 서쪽에서 활발한 활동이 감지되었다. 9월 30일의 두 차례의 발파 이후에는 채광 작업장의 크기가 확장된 것으로 추정된다. 2018년 및 2019년의 활동 변화는 4개월 단위의 시간 평균 영상을 RGB 영상으로 합성하여 분석하였다. 연도별 활동을 분석한 결과, 2018년은 채광 작업장의 북동쪽에서 활발하게 활동하는 영역을 찾을 수 있었으며, 2019년은 광미 적치장에서 확장에 따른 특징적인 활동이 확인되었다. NDAI를 이용한 시계열 분석으로 광학 영상으로는 확인하기 어려운 노천 광산의 무작위적인 지표 변화를 탐지할 수 있었다. 특히 현장 자료를 획득할 수 없는 지역의 광산 활동을 원격 탐사를 이용하여 효과적으로 수행할 수 있었다. Open-pit mines require constant monitoring as they can cause surface changes and environmental disturbances. In open-pit mines, there is little vegetation at the mining site and can be monitored using InSAR (Interferometric Synthetic Aperture Radar) coherence imageries. In this study, activities occurring in mine were analyzed by applying the recently developed InSAR coherence-based NDAI (Normalized Difference Activity Index). The March 5 Youth Mine is a North Korean mine whose development has been expanded since 2008. NDAI analysis was performed with InSAR coherence imageries obtained using Sentinel-1 SAR images taken at 12-day intervals in the March 5 Youth Mine. First, the area where the elevation decreased by about 75.24 m and increased by about 9.85 m over the 14 years from 2000 was defined as the mining site and the tailings piles. Then, the NDAI images were used for time series analysis at various time intervals. Over the entire period (2017-2019), average mining activity was relatively active at the center of the mining area. In order to find out more detailed changes in the surface activity of the mine, the time interval was reduced and the activity was observed over a 1- year period. In 2017, we analyzed changes in mining operations before and after artificial earthquakes based on seismic data and NDAI images. After the large-scale blasting that occurred on 30 April 2017, activity was detected west of the mining area. It is estimated that the size of the mining area was enlarged by two blasts on 30 September 2017. The time-averaged NDAI images used to perform detailed timeseries analysis were generated over a period of 1 year and 4 months, and then composited into RGB images. Annual analysis of activity confirmed an active region in the northeast of the mining area in 2018 and found the characteristic activity of the expansion of tailings piles in 2019. Time series analysis using NDAI was able to detect random surface changes in open-pit mines that are difficult to identify with optical images. Especially in areas where in situ data is not available, remote sensing can effectively perform mining activity analysis.

LID 시설로서 벽면녹화 시스템의 저류 효과 분석

문지현(Jihyun Moon),박재록(Jaerock Park),권순철(Soonchul Kwon),김재문(Jaemoon Kim) 한국방재학회 2023 한국방재학회논문집 Vol.23 No.3

Urbanization and climate change produce distortions in urban water circulation. This issue can be resolved using a stormwater management technique called Low Impact Development (LID), which mimics natural processes and restores the hydrological state as it was before development. This study aims to evaluate the performance of a LID facility and calculate the runoff reduction and delay effect. The test-bed is a green wall of the Korea GI & LID Center. Scenarios for 30 mm/hr, 50 mm/hr, and 70 mm/hr were set based on the percentile of rainfall events from 2012 to 2021 in Geumjeong-gu, Busan. By setting an impervious surface as the control group, runoff reduction was found to be 91%~94% of 30 mm/hr, 50 mm/hr, and 70 mm/hr. The total outflow time increased by 47, 88, and 58 minutes, respectively, demonstrating the effect of reduced runoff and delayed time. A storm water management model (SWMM) was constructed to evaluate this effect quantitatively. Verification and correction were done using the experiment results. R2 was 0.96~0.98 for the test and 0.93~0.94 for the correction. This paper thus verified the retention effectiveness performance of a green wall and analyzed its quantitative effect through a SWMM. The study findings can be used as a guideline to test parameter-wise hydrological performance of the model.