미만성 경화 아형 갑상선 유두암 1예

최정민,이송주,김부경,최영식,박요한,김정훈,허방 고신대학교 의과대학 2009 고신대학교 의과대학 학술지 Vol.24 No.1

The diffuse sclerosing variant (DSV) is a rare malignant tumour that accounts for 0.7-5.3% of all papillary thyroid cancers. DSV tends to occur at a younger age and has a higher incidence of cervical lymph node metastases, compared with papillary thyroid carcinoma. A 62-year-old female patient diagnosed thyroid nodule with diffuse and mild increased 18F-deoxy-glucose (FDG) on FDG positron emission tomography (PET)-computed tomogram (CT) scan. The ultrasound images showed typical findings of DSV such as diffusely enlarged thyroid lobes and diffusely scattered microcalcification. We performed this patient ultrasonography guided fine needle aspiration and cytologic analysis revealed papillary carcinoma. Total thyroidectomy with central compartment node dissection and lateral lymph node dissection was performed and finally diagnosed DVS. The authors report this case with literature review.

Calibration of the Pyranometer Sensitivity Using the Integrating Sphere

Kim, Bu-Yo,Lee, Kyu-Tae,Zo, Il-Sung,Lee, Sang-Ho,Jung, Hyun-Seok,Rim, Se-Hun,Jang, Jeong-Pil Springer-Verlag 2018 Asia-Pacific Journal of Atmospheric Sciences Vol.54 No.4

Retrieval of outgoing longwave radiation at top-of-atmosphere using Himawari-8 AHI data

Kim, Bu-Yo,Lee, Kyu-Tae,Jee, Joon-Bum,Zo, Il-Sung Elsevier 2018 Remote sensing of environment Vol.204 No.-

<P><B>Abstract</B></P> <P>This study proposes an algorithm to retrieve the outgoing longwave radiation at the top of the atmosphere (TOA OLR) using the advanced Himawari imager (AHI) unit that is a narrowband sensor installed in Himawari-8, a geostationary satellite providing window and water vapor imagery. The outgoing longwave radiation at the top of the atmosphere (TOA OLR) was retrieved by an empirical method where a radiative transfer model (RTM) was used to simulate various atmospheric conditions, such as the surface temperature, water vapor, and cloud characteristics (e.g., cloud optical thickness and cloud height). The results of an algorithm using a single channel (OLR<SUB>12.4</SUB>) and two channels (OLR<SUB>6.2+12.4</SUB>) were converted into Terra Cloud and Earth's Radiant Energy System (CERES) TOA OLR for the daytime (0105–0135 UTC) and nighttime (1325–1355 UTC) cases of a scene analysis (typhoon Goni on August 18, 2015). Long-term analysis (August 2015–July 2016) and statistical analysis (i.e., mean, bias, root mean square error (RMSE), and correlation coefficient) were conducted. The analysis results showed that the largest error was produced in the cloudy areas (overcast areas), and the minimum RMSE and a high correlation coefficient were observed over an ocean area. In the scene analysis, however, the daytime and nighttime average RMSE of the CERES TOA OLR and OLR<SUB>6.2+12.4</SUB> was 12.21Wm<SUP>−2</SUP> and showed the correlation coefficient of 0.971. It was an improved result over the RMSE (12.33Wm<SUP>−2</SUP>) and correlation coefficient (0.967) shown in the analysis of OLR<SUB>12.4</SUB>. In the long-term analysis, the average RMSE was 11.83Wm<SUP>−2</SUP> and showed a correlation coefficient of 0.972 (OLR<SUB>12.4</SUB> showed 12.17Wm<SUP>−2</SUP> and 0.969). Furthermore, to minimize the difference in the cloud area that had the largest error, the study analyzed TOA OLR at the significance level of 95% (±2 RMSE). As a result, the scene analysis showed an RMSE of 10.54Wm<SUP>−2</SUP> and correlation coefficient of 0.977, and the long-term data showed an RMSE of 10.23Wm<SUP>−2</SUP> and correlation coefficient of 0.979.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Development of new retrieval algorithm to estimate TOA OLR from Himawari-8 AHI. </LI> <LI> Retrieval of TOA OLR using both window and water vapor channels. </LI> <LI> TOA OLR retrieved from Himawari-8 AHI is performed scene and long-term analysis. </LI> <LI> Retrieved TOA OLR from AHI agree well with CERES data. </LI> </UL> </P>

고유공간 변환 기반 등간격 원형 어레이의 고분해 2차원 입사각 추정

고요한(Yo-han Ko),부성춘(Sung-chun Bu),이철수(Chul-soo Lee),김도경(Do-kyoung Kim) 한국통신학회 2018 韓國通信學會論文誌 Vol.43 No.12

손상 선박 기름 유출량 추정을 위한 수치해석과 이론식의 비교 연구

문요섭(Yo-Seop Moon),김제인(Je-In Kim),박일룡(Il-Ryong Park),서성부(Seong-Bu Suh),이승국(Seung-Guk Lee),최혁진(Hyuek-Jin Choi),홍사영(Sa-Young Hong) 대한조선학회 2022 大韓造船學會 論文集 Vol.59 No.6

손상 선박 기름 유출량 추정을 위한 수치해석과 이론식의 비교 연구

문요섭(Yo-Seop Moon),김제인(Je-In Kim),박일룡(Il-Ryong Park),서성부(Seong-Bu Suh),이승국(Seung-Guk Lee),최혁진(Hyuek-Jin Choi),홍사영(Sa-Young Hong) 한국해양환경·에너지학회 2022 한국해양환경·에너지학회 학술대회논문집 Vol.2022 No.11

본 논문은 손상된 단일선체 및 이중선체 선박으로부터의 기름유출에 대한 수치해석 및 이론적 예측 결과를 제공한다. 비정상 베르누이 방정식에서 도출된 이론적 방정식과 다상 유동 해석을 위한 CFD 해석을 사용하여 기름 유출량을 추정하였다. 좌초 및 충돌 사고 발생으로 손상된 단일선체 기름탱크에서 기름 유출량 추정은 수치적, 이론적 해석 모두 실험 결과와 좋은 일치를 보였다. 그러나 이중선체 조건에서 이론적 해석의 경우 밸러스트 탱크 내부의 물과 기름 혼합량의 시간 변화 예측은 수치해석 결과와 다소 다른 결과를 보였다. 그 이유는 기름탱크에서 유출되는 기름과 밸러스트 탱크로 유입되는 물의 상호작용이 이론식에 반영되지 않았기 때문에 보인 결과로 판단된다. 탱크가 밀폐된 압력 조건에서 기름유출 및 물 유입이 지연되었다. 밸러스트 탱크 내부 기름과 물의 유동 상호작용이 복잡하지 않을 때 수치해석 결과와 이론식 결과가 좋은 일치를 보였다. This paper provides the results of numerical and theoretical predictions of oil outflows from damaged single-hull and double-hull ships.Theoretical equations derived from the unsteady Bernoulli equation and a CFD method for multi-phase flow analysis were used to estimate the oil outflow rate from cargo tank. The predicted oil outflow rate from a single hull cargo tank damaged due to grounding and collision accidents showed a good agreement with the available experimental results in both numerical and theoretical analyses. However, in the case of the double hull conditions, the time variation of the amount of water and oil mixture inside the ballast tank predicted by the theoretical equation showed some different behavior from the numerical results. The reason was that the interaction of the oil flow with the water inflow in the ballast tank was not reflected in the theoretical equation. The oil outflow and water inflow was delayed at the pressure condition that the tanks are sealed. When the flow interaction between the oil and water in the ballast tank was not complicated, the theoretical and the numerical results showed a good agreement with each other.

우리나라에서 만성 질병에 대한 가족 대응 지수의 신뢰도 및 타당도 조사

윤방부,김태수,이동환,장요섭 대한가정의학회 1995 Korean Journal of Family Medicine Vol.16 No.11

C1P1 DCB를 추정하는 광역보강항법 시스템

부성춘 ( Sung-chun Bu ),소형민 ( Hyoung-min So ),김갑진 ( Kap-jin Kim ),이철수 ( Chul-soo Lee ),김도경 ( Do-kyoung Kim ),고요한 ( Yo-han Ko ) 한국항행학회 2018 韓國航行學會論文誌 Vol.22 No.5

광역보강항법 시스템은 광역 지역에서 사용할 수 있는 보정 데이터(이온층 지연, 위성 및 시계 오차) 및 무결성 정보를 생성하여 전송하는 시스템으로 대표적으로 위성기반 보강항법 시스템인 SBAS가 있다. 미국에서는 WAAS라는 명칭으로 운용하고 있고 유럽에서는 EGNOS, 일본에서는 MSAS, 러시아는 SDCM, 인도는 GAGAN이라는 명칭으로 광역보강항법 시스템을 운용 하고 있다. 한국에서도 KASS명칭으로 2022년 목표로 개발을 진행하고 있다. SBAS 시스템은 국제민간항공기구 ICAO에서 국제 표준으로 정한 시스템으로 민간 서비스를 위해 운영된다. 따라서 보정 데이터도 민간 SPS 수신기용으로만 사용되고 있다. 본 논문에서는 SPS용 보정항법 시스템을 PPS 수신기에 사용하기 위해 필요한 C1P1 DCB 추정 방법에 대해 논의한다. 추정된 C1P1 DCB 결과를 바탕으로 단일 위성항법에서의 C1P1 DCB영향을 분석 후 SPS용 차분위성항법 시스템을 PPS 수신기에 적용한 결과를 분석하였다. 마지막으로 SPS용 광역보강항법 시스템을 PPS 수신기에 적용하여 결과를 분석하였다. Wide area augmentation system is a system that generates and transmits correction and Integrity information for use in wide area. Typical system is SBAS. In the United States, it operates under the name WAAS, EGNOS in Europe, MSAS in Japan, SDCM in Russia, GAGAN in India. it is developing Korean SBAS which named KASS by 2022 in Korea. SBAS is a standard System that is operated as civil aviation service base and set as international standards by ICAO. So the correction data can only is used for civil SPS receiver. In this paper, we discuss C1P1 DCB estimation which need to use SPS correction service for PPS receiver. Then we analyze C1P1 DCB correction effect under standalone Satellite Navigation and method to use PPS receiver under SPS DGPS. Finally we organize wide area augmentation system for PPS receiver and analysis performance.

고해상도 Landsat 8 위성자료기반의 지표면 온도 산출

지준범 ( Joon Bum Jee ),김부요 ( Bu Yo Kim ),조일성 ( Il Sung Zo ),이규태 ( Kyu Tae Lee ),최영진 ( Young Jean Choi ) 대한원격탐사학회 2016 大韓遠隔探査學會誌 Vol.32 No.2

2013년부터 2014년까지 관측된 Landsat 8 위성자료로부터 지표면 온도를 산출하였고 산출된 지표면 온도는 지상에서 관측된 지표면 온도를 이용하여 보정하였다. 지표면 온도지도는 Landsat 8로부터 산출된 지표면 온도를 지상에서 관측된 지표면 온도와의 선형 회귀식을 이용하여 계산되었다. 계절과 년에 대한 지표면 온도는 각각 계절과 년에 대하여 사례들을 평균하여 계산되었다. 지표면 온도는 도시의 공업 또는 상업지역에서 높은 온도가 나타나는 반면, 서울주변의 높은 고도의 산악과 해양, 강 등에서 낮은 지표면 온도가 나타났다. 위성에서 산출된 지표면 온도를 보정하기 위하여 서울을 포함한 수도권지역에서 관측되는 기상청 종관측소 3개 지점 (서울(지점번호: 108), 인천(지점번호: 119), 수원(지점번호: 112))의 지표면 관측자료를 이용하여 선형회귀방법을 적용하였다. Landsat 8의 지표면 온도는 모든 자료에서 기울기가 0.78이었고 5개의 흐린날을 제외한 맑은 상태의 자료에서 0.88이었다. 그리고 초기 지표면온도에서 상관계수는 0.88이었고 평방근 오차 (Root Mean Sqare Error (RMSE))는 5.33℃이었다. 지표면 온도 보정이후에는 상관계수는 0.98 그리고 RMSE는 2.34℃이었으며 회귀식의 기울기는 0.95로 개선되었다. 계절 및 년 지표면 온도는 상업지역과 공업지역 그리고 도시와 주변지역을 잘 표현하였다. 결과적으로 지상에서 관측된 지표면 온도를 이용하여 위성에서 산출된 지표면온도를 보정하였을 때 실제 상태와 유사한 분포를 보였다. Land Surface Temperature (LST) retrieved from Landsat 8 measured from 2013 to 2014 and it is corrected by surface temperature observed from ground. LST maps are retrieved from Landsat 8 calculate using the linear regression function between raw Landsat 8 LST and ground surface temperature. Seasonal and annual LST maps developed an average LST from season to annual, respectively. While the higher LSTs distribute on the industrial and commercial area in urban, lower LSTs locate in surrounding rural, sea, river and high altitude mountain area over Seoul and surrounding area. In order to correct the LST, linear regression function calculate between Landsat 8 LST and ground surface temperature observed 3 Korea Meteorological Administration (KMA) synoptic stations (Seoul(ID: 108), Incheon(ID: 112) and Suwon(ID: 119)) on the Seoul and surrounding area. The slopes of regression function are 0.78 with all data and 0.88 with clear sky except 5 cloudy pixel data. And the original Landsat 8 LST have a correlation coefficient with 0.88 and Root Mean Square Error (RMSE) with 5.33°C. After LST correction, the LST have correlation coefficient with 0.98 and RMSE with 2.34°C and the slope of regression equation improve the 0.95. Seasonal and annual LST maps represent from urban to rural area and from commercial to industrial region clearly. As a result, the Landsat 8 LST is more similar to the real state when corrected by surface temperature observed ground.

Preliminary Analysis of Raindrop Size Distribution and Estimation of Cloud Microphysics using Ground-based Observationat Mountain Site in Korea and at Other Sites in East Asia

Joo Wan Cha,Hae Jung Koo,Bu Yo Kim,Belorid Miloslav,Min Hoo Kim,Hyun Jun Hwang,Dong Ho Park,Hyun-Kyoung Lee,Ki Ho Chag,Chulkyu Lee 한국기상학회 2021 한국기상학회 학술대회 논문집 Vol.2021 No.10

A DSD (Drop Size Distribution) of rainfall observed in 2010 and 2011 using parsivel (Particle Size Velocity disdrometer) in Korea"s mountainous regions. The cloud microphysical processes for precipitation generation was estimated by the conceptual model of the cloud microphysical process using the DSD parameters. This study tried to find out the differences in the main cloud microphysical processes in different climate region by comparing the data of this study with those of previous studies at each site in East Asia and analyzed the most dominant cloud microphysical processes by rainfall intensity at each site in previous studies. For defining climate at each site in East Asia, this study used the Köppen-Geiger climate classification. As the defining climate at each site in East Asia, the main cloud microphysical processes were “VD” (Vapor Deposition) below light rain rate and “Mixed WC (Weak Convection)+ CC (Collision and Coalescence) +ICWRG (ICe-based and Warm Rain Growth)” above moderate rain rate in humid subtropical climate region. The most dominant cloud microphysical processes were “WC”, “CC”, “ICWRG” and the mixed microphysical processes of them in tropical rainforest climate region, “VD” and “ICWRG” in subarctic climate in high altitude region and mega cities of hot summer continental climate, “Mixed ICG and ICWRG” in warm summer continental climate region, and “ICWRG” in dry winter humid subtropical climate region.