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의도적 혈관 압박손상 후의 가토 대퇴동맥의 미세혈관 문합시 헤파린의 국소세척 및 전신투여 효과에 대한 실험적 연구
김동주,김수관,문성용,윤정훈,Kim, Dong-Joo,Kim, Su-Gwan,Moon, Seong-Yong,Yoon, Jung-Hoon 대한악안면성형재건외과학회 2007 Maxillofacial Plastic Reconstructive Surgery Vol.29 No.2
This study compared the histological patency rates of anastomoses of the femoral artery. Twelve rabbits weighing about 2 kg were studied. Both the right and left femoral arteries were cut. The control group had no damage to the vessel, saline irrigation, and micro-anastomosis. Experimental group I had a crush injury to the vessel, saline irrigation, and micro-anastomosis. Experimental group II had a crush injury, saline irrigation, 100 U/ml heparin irrigation, and micro-anastomosis. Experimental group III had the same treatment as experimental group II plus the systemic application of 100 U/kg heparin iv. The histological patency rates were compared. The patency rates of the control group 30 min and 3 days after the anastomosis were 100 and 83%, respectively. The respective rates for experimental groups I and II 30 min and 3 days after the anastomosis were 100% in all cases. The respective rates in experimental group III were 100 and 83%. In this study, no significant correlation was observed between the patency rate and the effects of local irrigation or the systemic application of heparin on the microvascular anastomosis of the rabbit femoral artery. However, the patency rate tended to decrease concomitantly with an increase in surgery time. Increased bleeding was observed after the systemic application of heparin. Obvious damage to the crush-injured vascular endothelium was detected on histologic examination of the micro-anastomosed area. In addition, some vessels subjected to crush injury contained thrombi attached to the vascular endothelium. No preventive effect of heparin on thrombus formation was observed.
머신러닝 기법을 활용한 에너지 데이터 분석에 관한 연구
김동주,권성철,문종희,심기도,배문성,Kim, Dongjoo,Kwon, Seongchul,Moon, Jonghui,Sim, Gido,Bae, Moonsung 한국전력공사 2021 KEPCO Journal on electric power and energy Vol.7 No.2
After the spread of the data collection devices such as smart meters, energy data is increasingly collected in a variety of ways, and its importance continues to grow. However, due to technical or practical limitations, errors such as missing or outliers in the data occur during data collection process. Especially in the case of customer-related data, billing problems may occur, so energy companies are conducting various research to process such data. In addition, efforts are being made to create added value from data, which makes it difficult to provide such services unless reliability of data is guaranteed. In order to solve these challenges, this research analyzes prior research related to bad data processing specifically in the energy field, and propose new missing value processing methods to improve the reliability and field utilization of energy data.
NO<sub>x</sub> 제거용 저온 플라즈마 반응기에서의 플라즈마 화학 및 입자 성장
김동주,김교선,Kim, Dong-Joo,Kim, Kyo-Seon 강원대학교 산업기술연구소 1999 産業技術硏究 Vol.19 No.-
We analyzed theoretically the removal efficiency and the particle growth inside the pulse corona discharge reactor to remove $NO_x$ and investigated the effects of process variables such as the NO and $NH_3$ input concentrations. Most of NO is converted into $NO_2$ and $HNO_3$ and the $HNO_3$ reacts with $NH_3$ to form the $NH_4NO_3$ particles. About 6.4% of NO is converted into $HNO_2$ which form the $NH_4NO_2$ particles by reaction with $NH_3$. Some of $NO_2$ follows the reaction pathway to form $NO_3$ and $N_2O_5$. The amount of particles formed inside the reactor is basically determined by the input $NH_3$ concentration. The ratio of NO to $NH_3$ affects the reactor length for particle formation significantly. The higher the input concentrations of NO and $NH_3$ are, the faster the particles grow.
김동주,김한우,Kim, Dong-Joo,Kim, Han-Woo 대한전자공학회 2002 電子工學會論文誌-CI (Computer and Information) Vol.39 No.6
Computational models up to now for Korean morphology have been linear in that it deal with only segmentation of morphemes rather than formation of the internal structure of a word. When integrating a linear computational model with syntax analysis, it requires an additional interface component between this model and the syntax to bind morphemes into sentence constituents. Furthermore the linear model is not semantically intuitive. In this paper, based on word-syntactical viewpoint, we propose an integrated computational model that deals with morpheme segmentation, formation of syntactic element (sentence constituent), and even internal structure of word. Formalism of two-level morphology is employed to cope with morpheme segmentation and alternation problems, and functional diacritics are proposed to incorporate categorial context into the two-level formalism. A modified GLR-based algorithm is also proposed to check syntactical constraint of morphemes. 한국어 형태론에 대한 기존의 전산모형은 선형적인 것들로 단어 내부구조 분석보다 형태소 분리 문제에만 관심을 두고 있다. 이러한 선형적 전산모형을 구문 분석 과정과 통합적으로 고려할 경우, 구문 단위 요소의 형성을 위해 형태소 분석 결과를 묶어야만 하는 추가적인 과정이 필요할 뿐만 아니라 의미적 직관성을 얻기도 어려웠다. 본 논문에서는 형태소 분리와 구문 요소 형성뿐만 아니라 단어의 구조 분석까지도 통합적으로 다룰 수 있는 단어통사론적 시각에 따른 전산 모형을 제안한다. 먼저 형태소 분리와 변형 문제를 다루기 위해 2단계형태론의 형식화를 도입하고, 품사 문맥을 반영하기 위해 기능성 구분문자를 제안한다. 그리고 형태소의 통사적 결합 검사를 위해 GLR에 기반한 변형 알고리즘을 제안한다.