http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
오픈소스와 상용 DBMS 의 사용자 기대요인과 만족에 대한 연구
문정오,김종우 한국경영과학회 2008 한국경영과학회 학술대회논문집 Vol.- No.-
In this study, an empirical research based on survey has been performed to study the influence of user expectation to user satisfaction of commercial and open source DBMSs. According to the survey results, word-of-mouth and past experiences influence significantly to user expectation, and price influences to user expectation only for commercial DBMS users. The results show that the expectancy disconfirmation influences significantly to user satisfaction. Expectation and satisfaction levels of commercial DBMS users are higher significantly than those of open source DBMS users. However, expectancy disconfirmation of open source DBMS users is higher than that of commercial DBMS users.
FEM 프로그램 ABAQUS를 이용한 대형 자동차 프레임의 결합부에 대한 응력해석
문정오(Jeongoh Mun),김영권(Youngkweon Kim),이기수(Kisu Lee) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
This paper studies on the stress analysis over large-size automobile frame joints. The frame consists of some cross members and two side members. In this case, joints of the frame have a large effect on the automobile motions. So, to study on the contact between the members and the rivets is very important. In order to obtain the more similar real model, the used model in this paper was designed with shell elements and modeled by considering the spring effects. As a result of this study, we can obtain the relations between the cross member anjxthickness and maximum principal stress, also obtain the correlation between the rivets and the maximum principal.
광화학 반응에 의한 TiO<sub>2</sub> 나노입자 형성 및 광학특성(I)
정재훈,문정오,문병기,손세모,정수태 한국전기전자재료학회 2003 전기전자재료학회논문지 Vol.16 No.2
TiO$_2$ nanoparticles were prepared by photochemical synthesis in the dry toluene. The shape and size of the amorphous TiO$_2$ nanoparticles were investigated by transmission electron microscope. The particle size was varied by the contents of the titanium (IV) isopropoxide in dry toluene. Especially networked TiO$_2$ particles were formed from 40% titanium (IV) isopropoxide solution. The optical absorption spectra, photoluminescence, and PL excitation spectra of TiO$_2$ in dry toluene were obtained. The were shifted to the short wavelength as the contents of TiO$_2$ were increased. PL excitation had the peak at the wavelength regions is which the absorption increased steeply.
박정선,김봉수,문영미,김길하,홍기정,양정오 한국응용곤충학회 2017 한국응용곤충학회 학술대회논문집 Vol.2017 No.10
쌀에 발생하는 해충인 머리대장가는납작벌레를 대상으로 포스핀 훈증제 감수성 평가를 수행하였다. 머리대장가는납작벌레 알, 후기유충 및 성충을 대상으로 수행하였으며, 포스핀은 0.025, 0.051, 0.099, 0.501 및 0.999 mg/L 5개농도를 20시간 동안 처리하였다. 그 결과, 머리대장가는납작벌레 알은 0.025 mg/L에서 46.5%의 살충률을 보였고0.999 mg/L에서는 100.0%의 높은 살충률을 확인하였다. 후기유충과 성충은 0.099 mg/L 농도에서 각각 98.9, 94.4%의살충률을 보였으나, 0.501 mg/L 처리시에는 후기유충 및 번데기 모두 100%의 살충률을 확인하였다. 포스핀을 대상으로한 머리대장가는납작벌레의 태별 LCT50 값은 알은 0.710 mg h/L, 후기유충과 성충은 각각 0.254, 0.477 mg h/L로나타났으며, LCT99 값은 알은 1.593 mg h/L, 후기유충 1.278 mg h/L, 성충 3.042 mg h/L임을 확인하였다.
안드로이드 스마트폰에서 Dex 파일들의 유사도 비교 연구
고정욱,강성욱,문정오,김동진,조성제 한국소프트웨어감정평가학회 2013 한국소프트웨어감정평가학회 논문지 Vol.9 No.1
Copyright infringement in Android applications is a growing problem because Android applications can be easily reverse engineered and pirated. In this paper, we propose three techniques for comparing similarity between Android applications in order to detect the theft of the applications. The proposed techniques statically analyze the Dalvik VM executable files in the Dalvik Executable (.dex) format, and measure similarity between the executable files (DEX files). The first technique decompiles DEX (VM bytecode) files into corresponding Java source codes and computes similarity between the decompiled source codes. The second technique extracts string information contained in DEX files and calculates similarity between applications based on the string information. The last technique extracts methods’ features defined DEX files and compares similarity between applications based on the features. We evaluate the performance of the proposed techniques in terms of credibility and resilience by carrying out some experiments.
Association of COX2 −765G>C promoter polymorphism and coronary artery disease in Korean population
김인재,김상훈,차동훈,임상욱,문재연,김정오,류창수,박한성,성정훈,김남근 한국유전학회 2019 Genes & Genomics Vol.41 No.9
Background Cyclooxygenase-2 (COX2) plays a role in the formation of prostaglandins, which contribute to the inflammation involved in atherosclerosis. However, the role of the COX2 −765G>C polymorphism in susceptibility to coronary artery disease (CAD) is controversial. Objective To identify the association between COX2 −765G>C polymorphism with CAD risk in Korean patients. We recruited 622 patients who were diagnosed to have coronary artery disease and 202 controls who did not have history and vascular disease risk factors. Methods Using polymerase chain reaction-restriction fragment length polymorphism, the COX2 −765G>C polymorphism was analyzed in 622 Korean patients who received percutaneous coronary intervention and in 202 healthy control subjects. Results The GC+CC genotype frequencies of the −765G>C polymorphism were significantly different between the CAD and control groups. The COX2 −765G>C polymorphism showed peculiar associations with CAD according to the presence of hyperlipidemia and plasma folate levels. However, there were no associations between the −765G>C polymorphism and the rates of hypertension, diabetes mellitus, or homocysteine levels. Conclusion This study suggests that the COX2 −765G>C polymorphism is a possible genetic determinant for the risk of CAD, and an individual risk factor in Koreans. Thus, further association studies between the COX2 polymorphism and atherosclerotic-related diseases such as cerebrovascular or cardiovascular diseases in other races or ethnicities will be needed.
외기온도에 따른 도막 방수층 계면에 발생되는 수증기압에 관한 실험적 연구
고진수,이성복,신윤호,문정오,윤정운 대한건축학회 2007 大韓建築學會論文集 : 構造系 Vol.23 No.4
Over 30% of the total defects that have occurred recently in the Korean construction market are caused by the construction of defective waterproofing, and the phenomenon of air pockets in the waterproofing layer, which is caused by the concrete vapor pressure, is known to be the primary cause of defective waterproofing. Accordingly, in this study the theory about the relationship between water pressure and temperature as well as the damp-proofing volume of concrete and, then, the change of vapor pressure volume were measured and analyzed by making a test sample after spraying a dampness remover and a waterproofing material to a prepared specimen. As a result of measuring the water vapor pressure for the surface temperature of the waterproofing layer with the fluid-applied membrane temperature based on about 10℃, which is the average temperature of Seoul, it was found that first, the fluid-applied membrane elevated up to about 40℃, and the water vapor pressure generated from the fluid-applied membrane was about 0.3㎏f/㎠ when the surface temperature of the waterproofing layer was raised up to about 80℃. Second, when the fluid-applied membrane temperature of the waterproofing layer was raised from 30℃ to 35℃, about 0.1㎏f/㎠ of water vapor pressure was generated, and when supplying a thermal source to raise the fluid-applied membrane temperature of the waterproofing layer from 35℃ to 40℃, approximately 0.05㎏f/㎠ of water vapor pressure was generated.
주용선(Yongsun Ju),김영권(Youngkweon Kim),김방원(Bangwon Kim),문정오(Jeongoh Moon),이기수(Kisu Lee) 한국자동차공학회 2003 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
This paper presents the static analysis on the stress of a heavy- duty truck frame which is made up of side member anti cross member. The analysis is performed by finite element method. In order to be similar to real frame, modeled members are designed with shell elements. The static contact between the members and the rivets is considered at the joint, and the solution is compared with the simplified model without the rivet joints. The finite element code ABAQUS 6-2 is used for this analysis.
도막 방수층 계면에 발생되는 수증기압에 관한 실험적 연구
신윤호(Shin Yun-Ho),윤정운(Yun Jung-Woon),문정오(Mun Jung-O),고진수(Ko Jin-Soo) 한국구조물진단유지관리학회 2006 한국구조물진단학회 학술발표회논문집 Vol.10 No.2
As a result of measuring the water vapor pressure for the surface temperature of the waterproofing layer with the fluid-applied membrane temperature based on about 10℃, which is the average temperature of Seoul, it was found that first, the fluid-applied membrane elevated up to about 40℃, and the water vapor pressure generated from the fluid-applied membrane was about 0.03N/㎟ when the surface temperature of the waterproofing layer was raised up to about 80℃. Second, when the fluid-applied membrane temperature of the waterproofing layer was raised from 30℃ to 35℃, about 0.01N/㎟ of water vapor pressure was generated, and when supplying a thermal source to raise the fluid-applied membrane temperature of the waterproofing layer from 35℃ to 40℃, approximately 0.005N/㎟ of vapor pressure was generated.
도막 방수층 계면에 발생되는 수증기압에 관한 실험적 연구
신윤호 ( Shin Yun-ho ),윤정운 ( Yun Jung-woon ),문정오 ( Mun Jung-o ),고진수 ( Ko Jin-soo ) 한국구조물진단유지관리공학회 2006 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.10 No.2
As a result of measuring the water vapor pressure for the surface temperature of the waterproofing layer with the fluid-applied membrane temperature based on about 10°C, which is the average temperature of Seoul, it was found that first, the fluid-applied membrane elevated up to about 40°C, and the water vapor pressure generated from the fluid-applied membrane was about 0.03N/㎟ when the surface temperature of the waterproofing layer was raised up to about 80°C. Second, when the fluid-applied membrane temperature of the waterproofing layer was raised from 30°C to 35 °C, about 0.01N/㎟ of water vapor pressure was generated, and when supplying a thermal source to raise the fluid-applied membrane temperature of the waterproofing layer from 35°C to 40°C, approximately 0.005N/㎟ of vapor pressure was generated.