Sedimentation Pattern in a Macrotidal Bay (Namhaepo Bay), West coast of Korea

이상도,박수철,LEE, SANG-DO,PARK, SOO-CHUL The Korean Society of Oceanography 1991 韓國海洋學會誌 Vol.26 No.4

The sedimentation pattern in Namhaepo Bay, a macrotidal coastal embayment of western Korea, was investigated by means of analysing high-resolution seismic profiles, sediment samples, and tidal currents. Recent sediments up to 20 m which overlie the irregular surface of the acoustic basement. The sediments consist mainly of sandy silt and silt; the mean grain size of these sediments ranges from 4 to 5.5 phi, showing a shoreward-fining distribution pattern. This distribution pattern agrees are largely reversed during ebb, with a maximum velocity of 39 cm/sec. The calculated shear velocity of the tidal currents at sea bed ranges from 0.5 to 3.3 cm/sec during flood and from 0.7 to 2.5 cm/sec during ebb. The mean values of these velocities exceed the critical shear velocity for the silt particles. The data suggest that the tidal currents play an important role in the transportation and deposition of sediments in the bay and the surface topography of the sea floor is largely deter-mined by tidal sedimentation.

대학기부금 활성화를 위한 지원 방안

이상도(Lee Sang Do),전정수(Cheon Choung Soo) 한국국제회계학회 2010 국제회계연구 Vol.0 No.33

국내 사립대학은 현재 기부문화의 미성숙 및 실적이 저조하여 기부금을 활용한 교육재정 여력이 부족하여 질 높은 교육 · 연구를 하는 데 어려움을 겪고 있으며, 이에 따라 국가적인 경쟁력을 향상시키는 데도 한계를 느끼고 있다. 이에 반하여 미국 사립대학의 경우에는 그 동안 잘 조성된 개인기부문화를 바탕으로 하여 잘 훈련된 전담조직을 활용하여 획기적이고 기발한 기부방식 등을 고안하여 거액의 많은 기부금을 모금하고 있으며, 모금된 기부금을 재원으로 하여 안정적이고 수익성이 높은 투자관리를 통하여 교육에 필요한 수입재원으로 사용함으로써 질 높은 교육을 하는 데 일조를 하고 있다. 국내 사립대학이 앞으로 지속적으로 존재하면서 성장 · 발전하여 ‘교육’과 ‘연구’라는 고유목적사업을 차질 없이 수행하기 위해 필요한 기부금을 확보하려면, 첫 째, 학교기부금 활성화를 위한 학교의 자구노력은 기부친화적인 정책인프라가 확충될 때 그 효과가 극대화될 수 있다. 이를 위해서는 우선 기부 관련 법률을 탈규제적이고, 기금조성의 편의성을 도모하는 방향으로 개정하고 세제를 이용한 각종 혜택 역시 과감하게 추진되어야 한다. 둘째, 분야별 전문 모금기관 육성이라는 정책적 맥락에서 교육분야 모금기관을 육성 · 지원하거나 다양한 각종 기부제도 도입, 모금된 기부금이 투명하게 사용 · 관리될 수 있도록 감시 가능한 시스템이 정비될 필요가 있다. 셋째, 다양한 정책인프라 구축과 관련하여 사학진흥을 위하여 설립된 공공기관인 한국사학진흥재단의 역할도 재정립되어야 할 것이다. As the current contribution cultures of private universities in Korea are immature and its performance is poor, there is the lack of education funding through donations and higher education and research is difficult to be carried. Accordingly, there are limits to improve national competitiveness. On the contrary, in case of a private university of the United States, private donations have been well-maintained on the basis of culture, by using an well-trained and dedicated organization that utilizes significant and original contributions to devise ways is raising a lot of donations. Simultaneously donations raised by investing in a stable, profitable place used to finance imports needed for education and quality education. To secure the necessary contributions as Domestic private universities continue to grow and develop in the future in order to perform a unique educational and research purposes without a hitch, first, effort the school itself for activation of the donation maximizes the effectiveness when contribution-friendly infrastructure policies will be expanded. To do this, in the first place donations laws should be amended to be raised with ease and with less regulation and tax-related benefits should be given. Second, in the context of developing sectoral professional fundraising agencies we make sure that educational fundraising organizations will be fostered and supported, that a variety of donation systems will be introduced and that in order to transparently to be used and managed the donations raised, system for monitoring should be maintained Third, for a variety of policy infrastructure, the role of Korea Foundation for Promotion of Private Schools, Public institutions for the development of private schools will need to be reorganized.

상선과 실습선의 펌프 설치현황

이상일(Sang-Il Lee),이상득(Sang-Deuk Lee),이영호(Young-Ho Lee),남청도(Chung-Do Nam),조권회(kwon-Hae Cho),김유택(You-Taek Kim) 한국마린엔지니어링학회 2006 한국마린엔지니어링학회 학술대회 논문집 Vol.2006 No.-

Pumps have been widely used for transporting fluid in most of the merchant ships. However, the present status of using pumps for marine vessels has not been studied. This paper is to classify and analyze pumps installed in many ships(LNGC, Oil Tanker, Bulk, Container, Training ship). Finally, Pumps installed in the training ships are compared with merchant ships about the present status of using pumps.

고진공 화학증착법으로 증착된 비정질 실리콘 박막의 저온 고상결정화에 관한 연구

이상도(Sang-Do Lee),김형준(Hyoung-June Kim) 한국진공학회(ASCT) 1995 Applied Science and Convergence Technology Vol.4 No.1

LCD용 다결정 실리콘 TFT의 제조에 요구되는 고품위의 다결정 실리콘 박막을 600℃ 미만의 저온 공정으로 제조하는 기술로 비정질 박막의 고상 결정화(solid phase crystallization)가 유망하다. 본 연구에서는 고진공 화학증착기를 이용하여 증착된 비정질 실리콘 막의 고상 결정화 거동에 대해 연구하였다. 고상 결정화 속도 및 결정화 후의 결정성(결정립 크기 및 결함 밀도)은 화학증착시의 증착가스의 종류(SiH₄ 혹은 Si₂H_6), 공정 압력, 증착 온도 등에 민감한 영향을 받으며, Si₂H_6 가스의 사용, 증착 압력의 증가 증착 온도의 감소는 최종 결정립의 크기를 현저히 증가시킨다. 또한 증착전의 기초 진공도를 높임으로써 반응기 잔류 가스에 의한 산소나 탄소 등의 막내 유입이 감소되어 결정화 속도가 증가하고 결정성이 향상되었다. Soid Phase Crystallization(SPC) of amorphous silicon films is important as a technology for obtaining device-quality polycrystalline silicon films required for LCD poly-Si TFTs through low temperature processes (<600℃). In this study, characteristics of SPC of silicon films deposited by high-vacuum CVD system were investigated. The rates of SPC and resulting crystallinity(grain size or defect density) after SPC were affected by gas species(SiH₄ vs Si₂H_6), deposition pressure, deposition temperature. Use of Si₂H_6 gas, increase of pressure, lowering of deposition temperature greatly increase the final grain size after SPC. Also, lowered base pressure before deposition increases the SPC rates as well as crystallinity, probably through lowering the incorporation of residual impurities(O, C) into silicon films.

발전소 펌프 메카니컬씰 결함 유형별 신호특성

이상국(Sang-Guk Lee),이도환(Do-Hwan Lee),김대웅(Dae-Woong Kim) 한국소음진동공학회 2011 한국소음진동공학회 학술대회논문집 Vol.2011 No.4

Early Science of KVN: 43GHz fringe survey

이상성,김종수,정태현,손봉원,변도영,Lee, Sang-Sung,Petrov, Leonid,Kim, Jongsoo,Jung, Taehyun,Sohn, Bong Won,Byun, Do-Young 한국천문학회 2012 天文學會報 Vol.37 No.2

This paper presents the results of one of early sciences with Korean VLBI Network (KVN): a large fringe survey of compact radio sources at 43GHz. We established the catalog of correlated flux densities in three ranges of baseline projection lengths of 637 sources from a 43 GHz (Q-band) survey observed with the Korean VLBI Network. Of them, 623 sources have not been observed before at Q-band with VLBI. The goal of this work in the early science phase of the new VLBI array is twofold: to evaluate the performance of the new instrument that operates in a frequency range of 22--129 GHz and to build a list of objects that can be used as targets and as calibrators. We have observed the list of 799 target sources with declinations down to $-40{\circ}$. Among them, 724 were observed before with VLBI at 22 GHz and had correlated flux densities greater than 200 mJy. The overall detection rate is 78%. The detection limit, defined as the minimum flux density for a source to be detected with 90% probability in a single observation, was in a range of 115--180 mJy depending on declination. However, some sources as weak as 70 mJy have been detected. Of 623 detected sources, 33 objects are detected for the first time in VLBI mode. We determined their coordinates with the median formal uncertainty 20 mas. The results of this work set the basis for future efforts to build the complete flux-limited sample of extragalactic sources at frequencies 22 GHz and higher at 3/4 of the celestial sphere.

원전 펌프 메카니컬씰 결함평가

이상국(Sang-Guk Lee),이도환(Do-Hwan Lee),김대응(Dae-Woong Kim),이선기(Sun-Ki Lee) 한국소음진동공학회 2010 한국소음진동공학회 학술대회논문집 Vol.2010 No.4

삼출성 흉막염에서 흉막 생검 소견상 종피 과형성(Mesothelial Hyperplasia)의 진단적 의의

이상도 ( Sang Do Lee ),김우성 ( Woo Sung Kim ),김용훈 ( Yong Hoon Kim ),한성구 ( Sung Koo Han ),심영수 ( Young Soo Shim ),김건열 ( Keun Youl Kim ),한용철 ( Yong Chol Han ) 대한결핵 및 호흡기학회 1988 Tuberculosis and Respiratory Diseases Vol.35 No.3

영어 학습 능력 증진을 위한 심리구조모형 개발 및 적용연구

이상도(Lee, Sang Do) 팬코리아영어교육학회(구 영남영어교육학회) 2015 영어교육연구 Vol.27 No.3

The purpose of this study is to develop the psychological structural modeling for the improvement of the English learning proficiency of university students. In order to achieve this aim, the learning models based on learning cognitive, learning procedure and learning result are made. Data were obtained from the questionnaires of 289 university students. This study shows that the learning procedure(learning flow, learning motivation, cognitive strategies) has a significant influence on the academic achievement. The result of this survey is as follows. First, there is the high positive correlation between learning cognitive and learning procedure. Second, learning result is the predictor of the subordinate factors of learning procedure such as learning flow, learning motivation, and cognitive strategies. This result can help us make a positive psychological structural modeling for university students.

Automatic Anatomical Classification Model of Esophagogastroduodenoscopy Images Using Deep Convolutional Neural Networks for Guiding Endoscopic Photodocumentation

Jung-Whan Park(박정환),Yoon Kim(김윤),Woo-Jin Kim(김우진),Seung-Joo Nam(남승주) 한국컴퓨터정보학회 2021 韓國컴퓨터情報學會論文誌 Vol.26 No.3

위내시경 촬영은 조기에 위 병변을 진단하기 위해서 주로 사용한다. 하지만 위내시경을 했음에도 불구하고 위 내부를 자세히 관찰하지 못해서 10~20% 위 병변을 놓치는 경우가 생기는 것으로 보고되고 있다. 미국, 영국, 일본 등의 일부 국가와 세계내시경협회(Wold Endoscopy Organization)에서는 위내시경 시에 맹점 없는 관찰을 위해서 반드시 촬영해야 할 부위에 대한 촬영지침을 제안한 바 있다. 이에 본 논문에서는 수련의가 내시경을 하는 데 있어 위 내부를 자동으로 맹점 없이 관찰하는데 필요한 딥러닝 기술인 해부학적 분류모델을 제안한다. 제안한 모델은 위내시경 이미지에 적합한 전처리 모듈과 데이터 증강 기술들을 사용한다. 실험결과를 통해 최대 F1 점수 99.6% 분류 성능을 확인하였다. 또한, 실제 데이터를 통한 실험결과에서도 에러율이 4% 미만을 보였다. 이러한 성능을 바탕으로 설명 가능한 모델임을 보여 임상에서의 사용 가능성을 확인하였다. Esophagogastroduodenoscopy is a method commonly used for early diagnosis of upper gastrointestinal lesions. However, 10-20 percent of the gastric lesions are reported to be missed, due to human error. And countries including the US, the UK, and Japan, the World Endoscopy Organization (WEO) suggested guidelines about essential gastrointestinal parts to take pictures of so that all gastric lesions are observed. In this paper, we propose deep learning techniques for classification of anatomical sites, aiming for the system that informs practitioners whether they successfully did the gastroscopy without blind spots. The proposed model uses pre-processing modules and data augmentation techniques suitable for gastroscopy images. Not only does the experiment result with a maximum F1 score of 99.6%, but it also shows a error rate of less than 4% based on the actual data. Given the performance results, we found the model to be explainable with the potential to be utilized in the clinical area.