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RISS 인기검색어
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신형식 역삼투 복합막을 이용한 해양심층수 담수화 성능평가
홍영기,송경헌,문덕수,김현주,Hong, Young-Ki,Song, Kyung-Hun,Moon, Deok-Soo,Kim, Hyun-Ju 한국섬유공학회 2006 한국섬유공학회지 Vol.43 No.6
Asymmetric reverse osmosis(RO) composite membrane, which are organic/inorganic RO composite membranes by new mode, based on cellulose acetate and polyamide with nano particle tourmaline substance in order to develop a new desalination membrane having high selectivity and permeability were prepared. The practical separation performances of new RO composite membranes were investigated on seawater desalinization, especially for deep ocean water. The separation characteristics of new RO composite membranes were discussed with the variation of applied pressure and temperature. The permeation flux of new RO composite membranes was investigated using module unit composed of RO plate-frame type modules and spiral wound type modules. The rejection and the flux for new RO composite membrane were $99.0{\sim}99.3%\;and\;7.0{\sim}23.3l/m^2$ hr in deep ocean water at $20^{\circ}C$, respectively. In addition, the separation performance of new RO composite membranes for deep ocean water was very steady-state with long experiment time.
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폴리프로필렌 멜트블로운 공정 변수가 부직포 여과재의 포집 특성에 미치는 영향
홍영기,Hong, Young-Ki 한국섬유공학회 2006 한국섬유공학회지 Vol.43 No.5
Meltblown process is one of the major processes for nonwoven filters. In this study, the collection efficiency of meltblown nonwoven filters made of isotatic- polypropylene(i-PP) was examined for the various processing conditions such as die and air temperatures, die-to-collector distance(DCD) and attenuation air flow rate at the die. The collection efficiency for non-woven filter was found to increase with decreasing DCD, with increasing die temperature, or with increasing air flow rate. In addition, the quality factor of non-woven filter was excellent with increasing DCD in meltblown process like this.
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장서영(Seo-Yeong Jang),김현빈(Hyun-Bin kim) 대한전기학회 2022 대한전기학회 학술대회 논문집 Vol.2022 No.11
세계자원연구소에 따르면 꾸준히 증가하는 인구를 위해선 추후에 기존 생산량의 약 70% 이상의 식량을 확보해야 한다고 예상한다. 그러나 농업인들은 자연재해보다 자주 발생하는 병충해로 인한 피해로 원활한 작물 생산에 고충을 겪고 있다. 사람이 작물들의 상태를 매번 확인하는 데에 어려움이 있기에 병충해를 미리 예방하기란 쉽지 않다. 그래서 농가는 대체로 전문가에게 병충해 분류의 자문을 구한다. 하지만 시간이 오래 걸리고 병충해는 빠르게 번지기 때문에 피해가 커지는 경우가 있다. 이와 같은 농업의 고질적인 문제를 해결하고자 본 논문에서는 딥러닝을 기반으로 작물의 이미지 데이터를 이용해 병충해 피해를 입은 작물을 분류하는 연구를 제안한다. 이미지 분류 분야에 자주 쓰이는 컨볼루션 신경망(CNN)을 이용할 것이다. 그중에서도 기본적인 모델과 전이 학습 기반인 사전 훈련 모델 ResNet50으로 병충해 작물 이미지분류 성능을 평가할 것이다. 이러한 연구로 농가는 병충해 작물을 조기에 파악하고 이는 신속한 방제로 이어져 큰 피해를 예방할 수 있을 것이다.
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홍영기 ( Hong Young-ki ) 호남사학회 2016 역사학연구 Vol.64 No.-
This study reviewed the status and future tasks of research for Honam Righteous Armies(HRA) in the Great Han Empire. For this, several prior studies which published since independence were examined and looked into especially in the 1970s which this subject started. In addition, future directions are discussed. A research on HRA of the Great Han Empire began in earnest in the 1980s. Since then, about 70 papers have been released so far, including two doctoral thesis. In the process of overview the history of the Independence Movement, activities of the RA leaders were focused while HRA were described in small parts. After this, the biographies of RA were discovered and released, amounting to the first generation of researchers studying HRA in the mid 1980s. As a result, a second generation of research lead to the publication around the 1990s and deeper studies were broadened in the 2000s. Future tasks are as follows : first, new researchers urgently need to be trained for the developmental study on HRA in the future. Second, the study should intensify into small and medium sized groups for RA and their leaders. Third, direct background research on several factors of the third RA which took the main lead by HRA, needs to be found. Fourth, studying the life history of HRA is also necessary. Fifth, regional characteristics of RA should be found through comparative study with other regions. Futhermore, comparing RA of the Great Han Empire more with other countries` national movements will have a more meaning in a worlds historical way.
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근치적 절제술 후 Vater씨 팽대부암의 예후 인자 및 생존율 분석
홍영기(Young Ki Hong),정준(Joon Jeong),박준성(Joon Seong Park),정은주(Eun Joo Jung),이용상(Yong Sang Lee),박영년(Young Nyun Park),윤동섭(Dong Sup Yoon),최진섭(Jin Sup Choi),이우정(Woo Jung Lee),지훈상(Hoon Sang Chi),김병로(Byong Ro 대한외과학회 2004 Annals of Surgical Treatment and Research(ASRT) Vol.66 No.3
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