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공공분야 전자상거래 추진에서 나타난 정보기술 관점의 사례분석 연구
이재두,김정태,김병초 한국경영과학회 2002 한국경영과학회 학술대회논문집 Vol.- No.1(1)
본 연구에서는 국가 및 공공부문에서 전자상거래를 추진할 때 정보기술과 관련되어 발생하는 공통되는 문제를 도출하여, 향후 전자상거래를 추진할 때 시사점 및 교훈을 제시하고, 전자상거래를 추진하려고 하는 조직의 시행착오 최소화 및 이와 관련된 위험요소를 식별하기 위한 아이디어를 찾고자 한다. 이를 위해 공공에서 추진한 전자상거래와 관련된 정보화사업의 사례와 정보기술관점의 점검활동인 정보시스템감리의 결과를 기술적 관점에서 분석한다. 그리고 공공부문에서의 전자상거래관련 정보화사업을 추진을 할 때 기술적인 관점에서 유의해야 할 시사점을 도출하고, 향후 국가 정보화 사업의 효율성 및 효과성을 제고를 할 수 있는 방법을 제시 하고자 한다.
윤현두,허선,김재곤,이두철,백병주 大韓小兒齒科學會 1998 大韓小兒齒科學會誌 Vol.25 No.3
The purpose if this study was to evaluate temperature change occurred in enamel, dentin and pulp due to the heat from cavity prepration with laser. We made three models had different cavity depth : cavity depth of model Awas 3.52mm, model B was 2.32mm, model C was 1.16mm. We irradiated cavity base with thermal capacity of 30J,100J,300J/㎤s during few seconds and studied the change of temperature in tooth during 10 seconds, and estimated change of thermal capacity by different irradiated site and exposure time. AT 300j/㎤s irradiation for 2 seconds, the temperature of irradiated surface was elevated fast according to irradiated thermal energy during I second, In proportion to continuous exposure time, temperature elevated slowly The surface temperature was 1370℃. After discontinue of thermal irradiation, the heat of irradiated surface was diffused in dentin and pulp and the greatest temperature was made, The greatest temperature was disappeared within 10 seconds The greatest temperature of the inner part of model brought about very severe change by different depth. Temperature in pulp was raised by the greater irradiated energy density and exposure time.
기동토크특성 향상을 위한 250㎾급 견인 유도전동기의 최저설계
이병두(Byeong-Du Lee),이중호(Jung-Ho Lee) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.10
This paper deals with the optimum design criteria for the premium efficiency of 250㎾ traction induction motor. using response surface methodology (RSM) & finite element method (FEM). The focus of this paper is found firstly a design solution through the comparison of torque according to rotor bar shape rotor dimensions variations and, Secondly, a mixed resolution with central composite design (CCD) is introduced and analysis of variance (ANOVA) is conducted to determine the significance of the fitted regression model. The proposed procedure allows to define the rotor copper bar shape rotor dimensions starting from an existing motor or a preliminary design.
위암화과정에서 Helicobacter pylori 감염이 위점막 세포 역동학과 아포토시스 관련 단백질 발현에 미치는 영향
이강문 ( Lee Gang Mun ),이동수 ( Lee Dong Su ),양진모 ( Yang Jin Mo ),안병민 ( An Byeong Min ),이은희 ( Lee Eun Hui ),유진영 ( Yu Jin Yeong ),김유정 ( Kim Yu Jeong ),정인식 ( Jeong In Sig ),선희식 ( Seon Hui Sig ),박두호 ( Park Du 대한소화기학회 2003 대한소화기학회지 Vol.42 No.1
Background/Aims: We investigated apoptosis, cell proliferation and the expression of apoptosis-related proteins in the gastric epithelial cells of Helicobacter pylori (H. pylori)-negative and positive patients. Methods: TUNEL staining, immunohistochemical staining for Ki-67, p53, Bcl-2, Bcl-XL and Bax were performed on paraffin-embedded specimens obtained from 11 H. pylori-negative controls, 20 H. pylori-positive chronic gastritis, 10 chronic gastritis with intestinal metaplasia (IM), 11 adenoma, and 7 adenocarcinoma patients. Apoptosis and proliferation were expressed as apoptosis index (AI) and proliferation index (PI). Results: In H. pylori-positive groups, apoptosis and proliferation were increased compared with controls. However, an AI/PI ratio was highest in chronic gastritis cases and then gradually reduced according to the progress from IM to cancer. p53 was expressed in 28.6% of adenocarcinoma cases. Expression of Bax was significantly increased in chronic gastritis and IM patients compared with controls. Conclusions: H. pylori infection induces marked increase in apoptosis and proliferation of gastric mucosa. In the premalignant lesions, the balance between apoptosis and proliferation is altered, and this imbalance may play a key role in the gastric carcinogenesis. (Korean J Gastroenterol 2003;42:12-19)
유한요소법과 프라이자흐모델이 결합된 해석기법을 이용한 슬롯 수별 손실과 효율 평가에 따른 동기형 릴럭턴스 전동기의 새로운 고정자 설계
이병두(Byeong-Du Lee),이중호(Jung-Ho Lee),윤태원(Tae-Won Yun) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
This paper deals with the stator design solution of a synchronous reluctance motor (SynRM) with various slot number by loss & torque evaluations related to the slot open, teeth width using coupled Preisach modeling & FEM. The coupled Finite Elements Analysis (FEA) & Preisach model have been used to evaluate the nonlinear solution. Comparisons are given with characteristics of SynRM according to stator winding, slot number, slot open, teeth width variation, respectively.
유한요소법과 반응표면법을 이용한 고효율 250㎾급 견인유도전동기 최적설계
이병두(Byeong-Du Lee),이중호(Jung-Ho Lee),윤태원(Tae-Won Yun) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
This paper deals with the optimum design criteria for the premium efficiency of 250kw traction induction motor, using response surface methodology (RSM) & finite element method (FEM). The focus of this paper is found firstly a design solution through the comparison of torque according to rotor bar shape rotor dimensions variations and, Secondly, a mixed resolution with central composite design (CCD) is introduced and analysis of variance (ANOVA) is conducted to determine the significance of the fitted regression model. The proposed procedure allows to define the rotor copper bar shape rotor dimensions starting from an existing motor or a preliminary design.
대한간학회지 제6차 춘계학술대회 초록집 : 구연 ; 국내 Amatoxin 중독증의 연간발생률과 원인균종
안병민 ( An Byeong Min ),이동수 ( Lee Dong Su ),이강문 ( Lee Gang Mun ),박영민 ( Park Yeong Min ),이영석 ( Lee Yeong Seog ),정규원 ( Jeong Gyu Won ),선희식 ( Seon Hui Sig ),박두호 ( Park Du Ho ),김부성 ( Kim Bu Seong ),이종명 ( Le 대한간학회 2000 Clinical and Molecular Hepatology(대한간학회지) Vol.6 No.1(S)