The COVID-19 Pandemic Battlefield: Protection of Long Term Care Hospitals

Lim Seungkwan 대한감염학회 2020 Infection and Chemotherapy Vol.52 No.2

전문상담교사의 교육실습 지도경험에 관한 합의적 질적연구

반승관 ( Seungkwan Ban ),임유하 ( Yooha Lim ),신주연 ( Jooyeon Shin ) 경북대학교 중등교육연구소 2021 중등교육연구 Vol.69 No.3

본 연구는 전문상담교사 교육실습 지도교사들의 경험을 심층적으로 탐색하여 교육실습과정을 전반적으로 살펴보고 발전방향을 모색하는 것을 목적으로 하였다. 이를 위해 중·고등학교에서 교육실습 지도경험이 2회 이상인 전문상담교사 8명을 심층면담 하고, 수집된 면담자료를 합의적질적연구(CQR) 방법을 사용하여 분석하였다. 연구결과 교육실습 준비과정, 교육실습 운영과정(대인관계), 교육실습 운영과정(실무지도), 교육실습 평가, 교육실습 발전방향의 5개 영역과 13개의 범주, 41개의 하위범주가 도출되었다. 첫 번째 영역에서는 교육실습 준비시작 단계와 준비과정에서 어려움이 도출되었다. 두 번째 영역은 실습생에 대한 학교구성원들의 인식, 지도교사와 실습생의 협력적 경험 및 관계에서 어려움 범주가 나타났다. 세 번째 영역에는 상담지도방법, 실무지도과정에서 어려움과 지도과정의 의문점이 도출되었다. 네 번째 영역은 다양한 평가방법 사용, 실습평가과정에서 어려움과 평가의 한계 범주가 나타났다. 마지막으로 교육실습의 제도적 보완 요구와 교원양성기관의 요구가 도출되었다. 본 연구를 통해 전문상담교사가 교육실습지도 과정에서 경험하는 다양한 어려움과 상황들을 심층적으로 탐색할 수 있었으며, 전문상담교사 교육실습 지도 역량 향상과 실습여건 개선을 위한 기초자료를 마련할 수 있었다. 마지막으로 본 연구의 한계점 및 후속 연구를 제시하였다. The purpose of this study was to explore the training experience of student teaching by professional counseling teachers in depth to investigate the overall student teaching process and ways of improvement. A detailed interview was conducted on 8 professional counseling teachers that have more than 2 training experiences on student teaching at middle and high schools. The collected interview data was analyzed using consensual qualitative research method. 5 upper categories of student teaching preparation process, student teaching operation process on interpersonal relationship, student teaching on practical training, student training evaluation, and development direction of student teaching. Additionally, 13 categories and 41 subcategoreis were drawn out In the first category, preparation stage of student training and its challenges were discussed. In the second category, school members’ perception on student teacher and the difficulties in the collaboration and relationship between the teacher and the student teacher were revealed. In the third category, doubts on training process and difficulties in counseling guidance and practical training were explored. In the fourth category, limitations on use of various evaluation methods and difficulties in student teaching evaluation process were discussed. Lastly, needs for systemic complement and establishment of teacher training center were derived. This research allowed exploration of various challenges and situations professional counseling teachers experience during student teaching training and allowed preparation of basic resources to improve student teaching training capabilities and conditions. This research also provided its limitation and future study suggestions.

중동 시장 진출을 위한 현지맞춤형 저에너지 해수담수화 기술 개발

홍승관(Seungkwan Hong),황문현(Moon-Hyun Hwang),임상규(Sang Kyu Lim),주경훈(Kyoung Hoon Chu),김나영(Nayoung Kim ),박기호(Kiho Park),김정빈(Jungbin Kim) 대한토목학회 2019 대한토목학회지 Vol.67 No.2

Mathematical Modeling of Nitric Oxide Diffusion in Small Arterioles

Cho, Seungkwan,Kim, Han Sung,Lim, Dohyung 한국정밀공학회 2013 International Journal of Precision Engineering and Vol.14 No.11

The present study examined how the existence of glycocalyx layer (GLY) could influence the wall shear stress (WSS) and nitric oxide (NO) bioavailability in small arterioles. It was accomplished by considering GLY in determination of WSS, and its consequential effect on NO diffusion was predicted by a time-dependent computational model. The results showed that the WSS with consideration of GLY was not significantly different from that without the consideration. Although the difference was not statistically significant, the mean WSS with consideration of GLY was slightly greater than that without the consideration. The corresponding computational simulation to the existence of GLY showed no significant effect of GLY consideration on the peak NO concentration in the endothelium. In addition, no significant difference was found in sGC activation between with and without consideration of GLY. The above findings suggest that small changes in WSS due to the GLY existence may not significantly influence the NO transport or sGC activation in arterioles.

전해산화 및 유동 전극 축전식 탈염 하이브리드 공정을 통한 고염 조건에서의 유기물 분해 및 과염소산염 제거

임지훈(Jihun Lim),홍승관(Seungkwan Hong) 대한환경공학회 2021 대한환경공학회 학술발표논문집 Vol.2021 No.11

Infectivity of Coronavirus Disease 2019: A Prospective Cohort Study in the Korean Metropolitan Area

Seok Hyeri,Lim Seungkwan,Kim Ji-Yeon,Park Chul Hee,Kim Joon Ho,Woo Myoung Lyeol,Won Hyejin,Kang Yu Min,Oh Hong Sang,Song Kyoung-Ho,Jung Yun Jung,Kim Tark,Jo Soonam,Choi Won Suk 대한의학회 2022 Journal of Korean medical science Vol.37 No.14

Background: Although several characteristics of coronavirus disease 2019 (COVID-19), an ongoing pandemic disease, have been identified, data on the infectivity of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) are limited. Methods: This prospective cohort study was conducted to analyze the infectivity of SARSCoV-2 based on data of all patients diagnosed with COVID-19 confirmed using real-time polymerase chain reaction test from January to April 2020 in Gyeonggi-do, the largest province in Korea. Results: Of the 502 patients, 298 consisting of 106 clusters with 5,909 contacts were included. Of these, 277 (93.0%) were symptomatic, and the most common symptoms were cough, fever, sputum, sore throat, and headache. A total of 94 patients (31.5%) had pneumonia, while 8 (2.7%) died during the follow-up period. The secondary attack rate (SAR) in the study population was 3.5% (204/5,909). In exposure settings, the SAR was higher in religious gathering (13.5% [95% confidence interval, 10.7–16.8%]), workplaces (8.49% [95% CI, 6.08–11.74%]), and schools (6.38% [95% CI, 3.39–11.69%]) than in health care facilities (1.92% [95% CI, 1.45–2.55%]). Sore throat at any period, dyspnea at diagnosis or any period, lower cycle threshold value in the lower respiratory tract samples, leukocytosis, and higher bilirubin levels were associated with higher infectivity of COVID-19. The presence of symptoms was not related to the infectivity. Conclusion: In establishing the infection control strategies for COVID-19, the variables associated with high infectivity may be considered.

Evaluation of ethanol as draw solute for forward osmosis (FO) process of highly saline (waste)water

Kim, Jungwon,Kim, Junghyun,Lim, Jihun,Hong, Seungkwan Elsevier 2019 Desalination Vol.456 No.-

<P><B>Abstract</B></P> <P>In the study, ethanol was evaluated for its potential as a draw solution in forward osmosis (FO) in terms of performance for treating highly saline (waste)waters and energy requirements for regeneration. When compared to NH<SUB>4</SUB>HCO<SUB>3</SUB> (a thermolytic draw solution) ethanol exhibited significantly higher osmotic pressure and significantly easier regeneration. In FO experiments using commercial TFC FO membranes, the ethanol draw solution exhibited a water flux comparable to that of NH<SUB>4</SUB>HCO<SUB>3</SUB> at equivalent osmotic pressure albeit a relatively high reverse solute flux (RSF) due to its volatility. The modeling prediction based on membrane transport properties obtained from the FO experiments revealed the critical role of the ethanol permeability of the membrane in the overall FO performance, thereby suggesting the necessity of a higher water-ethanol selective membranes for the extensive application of the ethanol draw solution for the treatment of highly saline wastewater. Easy-regeneration of the ethanol draw solution was also demonstrated based on experimental results obtained using laboratory scale vacuum distillation at room temperature and exergy analysis of the integrated system. The results indicated that the regeneration process required an estimated 8.8 kWh/m<SUP>3</SUP>, thereby supporting the feasibility of ethanol as a potent draw solution for FO application of highly saline waters.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Ethanol as a draw solution in FO was investigated for treating high saline water. </LI> <LI> High osmotic pressure and easy-separability of ethanol were experimentally verified. </LI> <LI> Reduced RSF of ethanol was predicted to be critical to improving FO performance. </LI> <LI> The ethanol was easily reconcentrated by vacuum distillation with low energy. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

빅데이터를 이용한 청정 기술 현황과 융합기술 분석

임은정(Eunjung Im),윤성구(Seongku Yoon),유승관(Seungkwan Yoo),임효지(Hyoji Lim),김설홍(Seolhong Kim),최준호(Joonho Choi) 한국신재생에너지학회 2019 한국신재생에너지학회 학술대회논문집 Vol.2019 No.5

The Development and Operation of a Home Management System during the COVID-19 Pandemic: Experience of the Local Government Gyeonggi-do in Korea

Lee Yeji,Han Jin-Ok,Lee Heeyoung,Lim Seungkwan 대한의학회 2021 Journal of Korean medical science Vol.36 No.19

During the three the coronavirus disease 2019 (COVID-19) surges in South Korea, there was a shortage of hospital beds for COVID-19 patients, and as a result, there were cases of death while waiting for hospitalization. To minimize the risk of death and to allow those confirmed with COVID-19 to safely wait for hospitalization at home, the local government of Gyeonggi-do in South Korea developed a novel home management system (HMS). The HMS team, comprised of doctors and nurses, was organized to operate HMS. HMS provided a two-way channel for the taskforce and patients to monitor the severity of patient's condition and to provide healthcare counseling as needed. In addition, the HMS team cooperated with a triage/bed assignment team to expedite the response in case of an emergency, and managed a database of severity for real-time monitoring of patients. The HMS became operational for the first time in August 2020, initially managing only 181 patients; it currently manages a total of 3,707 patients. The HMS supplemented the government's COVID-19 confirmed case management framework by managing patients waiting at home for hospitalization due to lack of hospital and residential treatment center beds. HMS also could contribute a sense of psychological stability in patients and prevented the situation from worsening by efficient management of hospital beds and reduction of workloads on public healthcare centers. To stabilize and improve the management of COVID-19 confirmed cases, governments should organically develop self-treatment and HMS, and implement a decisive division of roles within the local governments.

Clinical and Laboratory Factors Associated with Symptom Development in Asymptomatic COVID-19 Patients at the Time of Diagnosis

오홍상,김준호,우명렬,Kim Ji Yeon,박철희,Won Hyejin,Lim Seungkwan,Jeong Hyeonju,Ham Sin Young,Kim Eun Jin,신승수,강유민,Yoon Doran,Lee Seung Youp,Song Kyoung-Ho 대한감염학회 2021 Infection and Chemotherapy Vol.53 No.4

In preparation for the surge of coronavirus disease 2019 (COVID-19), it is crucial to allocate medical resources efficiently for distinguishing people who remain asymptomatic until the end of the disease. Between January 27, 2020, and April 21, 2020, 517 COVID-19 cases from 13 healthcare facilities in Gyeonggi province, Korea, were identified out of which the epidemiologic and clinical information of 66 asymptomatic patients at the time of diagnosis were analyzed retrospectively. An exposure-diagnosis interval within 7 days and abnormal aspartate aminotransferase levels were identified as characteristic symptom development in asymptomatic COVID-19 patients. If asymptomatic patients without these characteristics at the time of diagnosis could be differentiated early, more medical resources could be secured for mild or moderate cases in this COVID-19 surge.