식도정맥류 출혈의 내시경적 결찰요법의 임상적고찰

정경태,박병수,최호순,고정희,박강서,조병석,이현상,최덕례 대한소화기내시경학회 1994 Clinical Endoscopy Vol.14 No.3

Endoscopic infection sclerotherapy(EIS) has been shown to be the most effective simple method for control of bleeding and eradication of varices. This method has been accepted widely as a standard treatment of bleeding esophageal varices. However, EIS may be associated with undesirable local and systemic complications. Endoscopic variceal ligation(EVL) was first described in 1986 by Stiegmann et al, which consists of mechanical ligation and thrombosis of varices using elastic $quot;0$quot;-ring. EVL has been shown to control active bleeding and to eradicate varices when sessions are repeated. The purpose of this study was to compare with change of esophageal variceal form, with respect to safety, efficacy and complications of EVL in the each sessions. We performed EVL in 43 patients who had recently bled from esophageal varices. Total 679 variceal ligations were performed during 174 separyte EVL sessians. Eighteen(94.7%) of those actively bleeding(19 patients) at initial treatment had bleeding controlled at initial session. During the study period two patients died after 1st and 3rd session, one who died from aggravation of concomitant hepatoma with rebleeding, the other died from early massive rebleeding after 3rd session. Rebleeding, before eradicates varices, occured in 7 patients(16.3%) two patients had bled from varices with aggravation of concomitant hepatoma, other 2 patients had bled from early varices ligation, other 3 patients had bled from re-varices formation in fundus of the stomach. Varices were eradicated or reduced to F₁ in 36 patients(87.8%) of the 41 follow up patients. Each patient received mean 15.8 ligations and 4.1 sessions during the 1st to 6th sessions. Eradication rate of varices(F_0) has increased from the 3rd to the 4th session periods. Improvement rate of varices(F₁) has increased from the 1st to the 3rd session periods. During the 5th or the 6h EVL sessions, eradication and improvement rate of esaphageal varices has been shown to decreased. During or after EVL, there were no major complications, except mild chest discomfort in 6 patients, early bleeding in 2 gatients, mild dysphagia in one patient of 43 patients. According to this study, EVL appears to control active variceal bleeding and eradicate varices with repeat treatments. It is a safe and effective treatment for esophageal varices bleeding. We recommended EVL as an alternative to EIS over the 5th sessions.

급성 심근경색후 퇴원전 Symptom-Limited Exercise Test의 임상적 고찰

정경태 凡石學術奬學財團 1998 凡石學術論文集 Vol.2 No.-

Posters ; 생리 및 대사조절 ; 효모의 성접합형에 따른 생리적 특성에 관한 연구 (1) - Rhodosporidium toruloides 의 세포내 invertase 를 중심으로 -

정경태,김병우,정영기 한국미생물생명공학회 ( 구 한국산업미생물학회 ) 1991 한국미생물생명공학회 학술발표초록집 Vol.1991 No.1

ASA Sizing 용 전분

정경태 강원대학교 부설 창강제지 기술연구소 1999 제지기술 Vol.- No.13

Alkenyl succinic anhydride(ASA) size 에멀젼 제조에 영향을 미치는 전분의 특성과 이전분이 사이징 효과에 어떤 영향을 미치는 지를 논의하고자 한다. ASA 사이징에 사용되는 전분의 특성으로는 양이온 치환도와 분자량, 그리고 원료 전분(감자, 옥수수, 찰옥수수) 및 종이내 전분 첨가량을 들 수 있다. ASA 에멀젼 품질과 안정성 그리고 종이의 사이즈도는 전분의 양이온 치환도와 첨가량에 따라 많은 영향을 받으며 따라서 높은 치환도의 전분을 많이 첨가하는 것이 유리하다. 한편 전분의 분자량은 ASA 에멀젼 품질에 영향을 미치지 않으며 ASA 사이징시 감자 전분 보다 일반 옥수수 전분이나 찰옥수수 전분이 더 효과적이다.

On the algebra and Einstein's connection in 2-dimensional *g-UFT

정경태,김성극 연세대학교 대학원 1980 延世論叢 Vol.16 No.2

Many types of solutions of Einstein's equation hove been obtained so far. They are, however, too complicated for the first class, probably due to the complexity of the 4-dimensional generalized Riemann space X4. The main purpose of the present paper is to study the algebraic and differential geometric peoperties of 2-dimensional *gλν-unified field theory in X2, reducing the dimension to 2. In particular, the solution of Einstein's equation will be obtained in a simple tensorial form using a particular recurrence relation.

건축디자인에서의 크리스털(Crystal) 원리 적용에 관한 연구

정경태 대한건축학회지회연합회 2019 대한건축학회연합논문집 Vol.21 No.1

Nowadays, architects have sought variety of approaches to discovering a geometrical algorithm in nature and speculating new architectural forms. This study aims to establish the direction of the actual architectural design process based on the theoretical research of architectural design process using the properties of crystal. It is meaningful that the research may lead to in-depth and diverse form finding speculation in the morphological aspect. Furthermore, it is crucial to create unexpected architectural forms. In this study, the geometrical feature and material properties of crystal focusing Pyrite were analysed and applied from the initial stage of design to the final architectural implementation stage. The specific process to develop this is divided into four stages: investigation and analysis of crystal, prototype form, single crystalline space and implementation of crystal architecture. The new form finding is not an architect's creation, but an architectural form that is discovered within the algorithm, the design language inventory, and the materiality reflecting direct and indirect investigation and analysis of the crystal. It is anticipated that this study will prove invaluable reference, help architects and design professionals speculate unpredictable form finding, which is followed by the continued crystal analysis and application to architecture design. 오늘날 건축가들은 자연에서 기하학적 원리를 발견하여 새로운 건축적 형태를 찾아내기 위해 다양한 접근 방법을 모색해 왔다. 본 연구에서는 크리스털의 특성과 이를 적용한 건축디자인 사례들의 이론적 고찰을 바탕으로 실제 건축디자인 프로세스의 방향성을 정립하고자하였다. 이 연구를 통해 심도 있는 다양한 형태적 연구가 이뤄질 수 있고, 더 나아가 결과물로서 예상치 못한 흥미로운 건축적 형태를 창출해 낼 수 있다는데 그 의의가 있다. 이에 본 연구에서는 황철석(Pyrite)을 중심으로 크리스털의 기하학적 특징과 재료적 물성을 분석한 후, 디자인 초기 단계부터 최종 건축적 실현 단계까지 적용하였다. 이를 발전시켜 나가는 구체적인 프로세스를 크리스털에 대한 조사 분석, 프로토타입(prototype) 구축 , 크리스털라인 단일 공간, 크리스털 건축의 실현의 네 단계로 구분하여 제시하였다. 본 연구에서의 새로운 형태는 건축가가 창조해내는 것이 아닌 크리스털에 대한 직간접적인 조사 분석을 통해 구축된 알고리즘과 설정된 디자인 언어, 그리고 물성이 그대로 반영되어 그 건축적 형태가 발견되어지는 것이다. 건축가들, 그리고 디자인 관련 전문가들에게 예측 불가능한 새로운 형태를 찾기 위한 참고자료가 될 것이며, 향후 지속적인 크리스털에 대한 분석과 설계에의 적용에 관한 연구가 이뤄지기를 기대한다.

On the 2-dimensional Considerations of Eigenvectors of k_(ij) in X₂

鄭慶泰,曺仲鉉 연세대학교 대학원 1977 延世論叢 Vol.14 No.2

본 논문의 목적은, 첫째로, (Mhλμ+kλμ)eμ= 0 에 의하여 정의된 eigenvalue M과 대응되는 eigenvector eυ의 특성을 X2에서 연구하고, 둘째로, nonholonomic frame을 X2에 도입하여 hλμ 와 kλμ eυ의 함수관계로 표시하는 데 있다.

土壤栽培에 있어서 질소 및 칼리의 施肥水準이 오이의 生育, 收量 및 無機成分吸收에 미치는 影響

具禹書,權成煥,鄭淳宰,鄭景泰 東亞大學校 大學院 1993 大學院論文集 Vol.18 No.-

Cucumbers were grown at 5 levels of Potassium and Nitrogen to stuudy the effect of N,k concentration on growth, yield and content of mineral elements. 1. Growth and yields were increased in N treatment with 16g per plant, and wrer increase in K treatment with 16me per liter. 2. The content of mineral elements of in leaves were higher N teatment than K treatment in content of T-N and Mg, and content of P was high in K treatment. 3. The content of mineral of petiole, fruit and Xyleme sap. were detected. The content in Xyleme sap, was most in N treatment all content expect of NO₃-N. NO₃-N and K were contented a lot in petiole Ca was contented a little in fruit. In K treatment, No-N and K were contented a lot in petiole, and the others were contented in Xyleme sap. Ca was contented a little in fruit. 4. The content of mineral in soil was detected in N and K treatment content of mineral was a little after than before treatment P while in case of P content was higher before treatment 5. absorption of water in cucumber plants was increased in N treatment with 8g per plants, while decreased in the K treatment 8 me per plant. The contents of chlorophyll was increased as the levels of Nitrogen was increased in N treatment, however, decreased on young leave as the level of Poassium was incresed in K treatment.

Vector product의 V_n에서의 n차원적 확장에 관하여

정경태,황인호,소금숙 연세대학교 자연과학연구소 1982 學術論文集 Vol.9 No.-

일반화된 Vector produce의 새로운 개념을 n차원 Riemann공간 V_n에 도입하고, 이 개념과 관련된 몇 가지 기본적 성질을 얻는 것이 본 논문의 목적이다. 또한, 본 논문에서는 매우 유용한 몇 가지 n차원 관계식을 유도하는데, 이 관계식은 3차원 Euclid공간에서 성립하는 관계식의 일반화된 것이다. In the present paper a new concept of vector product of n-1 vectors in a Riemannian space V_n, which is a generalization of vector product of two vectors in a 3-dimensional Euclidean space E_3, will be introduced using the concept of n-dimensional indicators. The purpose of the present paper is to obtain some elementary properties of this concept and to derive several useful generalized relation in V_n.

연안역 유출방사능 거통 단기예측을 위한 시스템 개발

정경태,김경옥,김미경,최병호 한국해양환경·에너지학회 2012 한국해양환경공학회 학술대회논문집 Vol.2012 No.5