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윤혜정,서규태,이택순 7개 국립대학교 환경연구논문집 공동발행 위원회 2005 공업기술연구 Vol.5 No.-
The corrosion rate of copper pipe used in distribution system was studied in presence of chloride, sulfate and fluoride ions, respectively. It was compared with test results using mixtures of sulfate and chloride at concentrations similar to those of tap water in Gyeongnam area. The corrosion rate of copper pipe was higher in the presence of sulfate than chloride showing two fold higher rate. In contrast copper concentration in synthetic water containing chloride was rather higher than in the presence sulfate. Fluoride was generally considered less aggressive toward corrosion of pipes, but corrosion rate and the concentration of copper were relatively large values. During potentiostatic anodic polarisation a relatively large current was producted in the chloride containing solutions.
임윤택,윤충화 明知大學校 産業技術硏究所 2000 産業技術硏究所論文集 Vol.19 No.-
As we use machine learning algorithms for text categorization in information retrieval, the major difficulty arises when the number of features in a text pattern gets too large for ordinary machine learning algorithms to operate efficiently. In order to solve this problem, feature selection technique can be employed to select important features that affects the correct classification of texts, and in turn reduces the number of features in a text pattern. In this paper, we have compared Information Gain, Gini Index, Relief-F, and Document Frequency, which are major feature selection methods. Our experiment showed that by applying feature selection methods to reduce the number of features in a text pattern, we can actually achieve better classification performance than by simply constructing a pattern with all the unique words in a text.
洋弓의 發射 時間과 得點과의 相關 關係에 관한 硏究 : 제 22회 전국 소년 체전 도대표 中心으로
최윤택 경남대학교 교육문제연구소 1994 敎育理論과 實踐 Vol.4 No.-
The purpose of the study was to investigate clicker time, and the relation of clicker time and score by measuring clicker time and score. The subjects of this investigation were composed of 10 players-5middle school male and 5 female. The dates were analyzed by clicker time and score in each round and the number of shootig times. The score to each clicker time, the clicker time to score, and the correlation of score to clicker time in 30 and 50 in meters were also analyzed. The Results were Summarized As Followa: 1.There was difference in clicker time between sezes, 2.The clicker time in 50 meters was longer than in 30 meters, but the score in 50 meters was lower than in 30 meters. 3.There was no difference of the clicker time in the number of shooting times 4.Clicker time was likely to be roger in the latter half of the round. 5.A good little relation between the clicker time and the score. 6.There was little relation between the clicker time and the score. 7.The longer clicker time was, the lower score was. Case that the clicker time was within two-three second, the score had a thedency to be higher.
치아 맹출전 시행한 기관 삽관이 유치열기에 미치는 영향에 대한 증례보고
신윤경,Hyun, Hong-Keun,김영재,김정욱,장기택,이상훈,김종철,한세현 大韓小兒齒科學會 2008 大韓小兒齒科學會誌 Vol.35 No.3
유치 맹출전에 치조융기에 가해진 외상은 유치의 맹출 지연 및 형태이상,치배의 변위 등을 일으킬 수 있으며 심한 경우 구개의 흠 형성,절치의 결함 및 후천성 구개열 등을 야기할 수 있다. 본 증례는 치아가 맹출하기 전에 수차례의 기관 삽관을 시행한 병력이 있는 심한 저체중아에서 맹출지연,형태이상,법랑질 저형성,영구치 치배 등의 변위가 관찰되어 이를 보고하는 바이다. Delayed eruption and abnormal morphology of the primary incisors following intubation may be due to follicular displacement and localized trauma caused by the process of intubation. Result of such damage included palatal groove formation, defective incisors and acquired clefts. This clinical report presents effect of intubation on the primary dentition of premature low-birth-weight children prior to tooth eruption.
이윤택 한국브레히트학회 1998 브레히트와 현대연극 Vol.6 No.-
죽음이란 강력한 정서적 충격을 일정한 거리를 두고 묘사해 나가면서 죽음을 희롱하고 삶에 대한 인식을 반동적으로 부여할 수 있다고 믿었습니다.나는 「오쿠-죽음의 형식」베를린 공연 팜플렛을 만들면서 Epische Distanzierung란 용어를 사용했습니다. 물론 이건 한국의 서사직 거리입니다.브레히트의 시사적 거리와 한국 전통의 원래적으로 지니고 있었던 서사직 거리는 어떤 관계를 가지는가 나의 심사는 이런 식이었고,그 과정에서 브레히트는 나의 연극식 자유에 귀중한 지표로 작용한 것입니다.우리가 외래 문화의 개념을 수용할 때,우리문화에 대한 아무런 준비없이 무턱대고 수입한 문화는 오래가지 못할 뿐 아니라 지금 이곳 우리의 문화로 정착되지도 못합니다.외래문화의 수입은 원래적으로 문화는 공유할 수 잇다는 전제아래 수용되어야 한다고 믿습니다.그 성공적인 사례가 바로 브레히트였고,이제 브레히트의 연극 개념은 브레히트의 것이라 새삼스럽게 언급할 필요조차 없는 우리의 연극 개념으로 통용되고 있음을 알려 드립니다.그 점에서 브레히트는 우리의 영원한 연극적 텍스트이며,바로 우리의 연극적 자산으로 성립될 것입니다.외래 사조가 자국의 전통과 만날 수 있을 때,문화의 상호 침투,혹은 융합의 세계문화를 꿈꿀 수 있을 것입니다.
레이저를 이용한 Tailored Blank 용접 판재의 피로거동
오택열,권윤기,이종재,곽대순 韓國工作機械學會 2000 한국생산제조학회지 Vol.9 No.4
For the Tailor Welded Blank sheet used for automobile body panel, the characteristics of fatigue strength and crack propagation behavior were studied. The thickness of specimen was joined to be same (0.9mm+0.9mm) and different (0.9mm+2.0mm). As a base test, mechanical properties around weld zone were examined. The results indicated that there were no significant decreases in mechanical properties, but hardness around weld bead was 2.3 times greater than base material. The fatigue strength was the highest when the loading direction was parallel to the welding direction, which was about 85% of tensile strength of base metal. It was decreased by 8.5% when the thickness of specimen and base metal was different, and it was increased by 25% when pre-strain was applied. The crack propagation rate was noticeably decreased around weld line and rapidly increased as it passed through weld line. Reviewing the shape of the crack propagation, crack width around weld line was wide around the weld zone due to retardation of crack growth, but it became narrow passing weld line due to decreased toughness.