2층 구조 유기 박막 EL 소자의 전기 - 광학적 특성

김민수,박세광 ( Minsoo Kim,Sekwang Park ) 한국센서학회 1995 센서학회지 Vol.4 No.4

Organic thin film electroluminescent(EL) cells were fabricated. Their output characteristics and luminance versus voltage characteristics were measured with different work function metal electrodes. The EL structure was Indium-Tin-Oxide(ITO)/hole transport layer/emission layer(electron transport layer)/metal electrode. PMMA+TPD(0.5 wt%), MC homopolymer+TPD(0.005 wt%) and (MC/MMA) copolymer+TPD(0.005 wt%) were used as hole transport layer. Ca, Mg, Mg:Ag(10:1) and A1 were used as metal electrode. I-V output showed exponential feature, and the threshold voltage of 5 volts and the luminance of over 700 Cd/㎡ at 10 volts were observed.

전기화학적 수소 압축기 성능 분석

김민수(Minsoo Kim),추찬호(Chanho Chu),김소연(Soyeon Kim),김민성(Minsung Kim),김동규(Dongkyu Kim) 한국자동차공학회 2022 한국자동차공학회 학술대회 및 전시회 Vol.2022 No.11

연속형/이산형 수반기법의 잔류항 비교

김민수(Minsoo Kim),이승수(Seungsoo Lee) 한국항공우주학회 2018 한국항공우주학회 학술발표회 논문집 Vol.2018 No.4

알타이 부르하니즘에 대한 몽골 라마교의 영향 연구

김민수(Kim Minsoo) 한국슬라브유라시아학회 2021 슬라브학보 Vol.36 No.2

Altai Burkhanism began in 1904 when a shepherd named Chet Chelpanov delivered the teachings of an old man dressed in white on a white horse to his own people. The point of the doctrine was that if we reject shaman and shamanism, as well as blood sacrifices, and pray while sprinkling milk and burning juniper, Oirot Khan will come to destroy the Russians and establish a country for the Altai people to make them live happily. The perspective on the origin of Burkhanism can be divided mainly into two perspectives that it was formed mainly on the basis of existing shamanism and that it was formed by the influence of the Mongolian Lamaism. In this paper, we reviewed the factors considered to be the influence of Lamaism on Burkhanism. In the past Altaians belonged to the Dzungar Khanate, where Lamaism was the state religion. So for a long time Altaians have known Lamaism and its various rituals. However, in Altaic mythology, major Buddhist deities such as Sigi-Mineh-Burkhan (Shakyamuni), Manjushri, Maitreya are the creatures of Ulgen, the supreme god of Altaic traditional shamanism, and they are killed by the evil god Erlik. This can be seen that although they were in the religious consciousness of the Altai people, Altaians did not worship them as supreme gods. Furthermore, the elements of rituals, such as sprinkling milk and burning juniper, were not necessarily the influence of Lamaism, as it was widely spread among pastoral peoples in Asia. And the Buddhist supplies and other lamaistic elements that yarliks had, were introduced from the more advanced Mongolian Lamaism in the process of developing the system of Burkhanism by the pro-Lamaistic yarliks after Chet Chelpanov’s arrest. Therefore, the Lamaistic elements within Burkhanism were basically formal ones, and Burkhanism did not accept the basic principles of Buddhism such as Nirvana.

다수의 유한 재생산률을 고려한 동적 폐기물 회수계획 및 다종제품 재생산계획 문제

김민수(Minsoo Kim),김종수(Jong Soo Kim),이운식(Woon-Seek Lee) 대한산업공학회 2014 대한산업공학회 추계학술대회논문집 Vol.2014 No.11

This paper considers a withdrawing and remanufacturing planning problem, in which wastes are withdrew by a container and can be remanufactured at each period by any value in the set {0, P, …,mP} where the rate P is the increment of a remanufacturing capacity and m is a nonnegative integer. The freight cost is proportional to the number of containers used. The multiple products are remanufactured by each taking a fixed portion (0<αi<1) of the input wastes to satisfy dynamic demands of each product over a discrete and finite time horizon. Also, a start-up cost is only incurred at the first period of a remanufacturing block which is consecutively remanufactured. It is assumed that the related cost (withdrawing and inventory holding costs of the wastes, and the remanufacturing and inventory holding costs of the remanufactured products) functions are concave and backlogging is not allowed. The objective of this paper is to simultaneously determine the optimal withdrawing and remanufacturing plans that minimize the total cost to satisfy dynamic demands of the multiple products. In this paper, the optimal solution properties are characterized and then, based on these properties, a dynamic programming algorithm is presented to find the optimal plan. Also, a network model is proposed to efficiently find the optimal solution to (u,v)-subproblems.

유한요소해에 기초한 이중 삼각뿔 압입 물성평가법

김민수(Minsoo Kim),현홍철(Hong Chul Hyun),이진행(Jin Haeng Lee),이형일(Hyungyil Lee) 대한기계학회 2012 大韓機械學會論文集A Vol.36 No.1

본 연구에서는 역해석 방법을 통해, 중심각이 서로 다른 두 삼각뿔 압입자를 이용하는 재료물성 평가법을 제안한다. 자기유사성을 갖는 첨단형 압입자를 사용한 압입시험 전산모사시, 동일 압입깊이에 대해 원뿔형 및 삼각뿔 압입자가 주는 하중-변위 곡선들이 다름을 확인했다. 따라서 삼각뿔형 압입자를 이용한 물성평가는 원뿔형 압입자와 별도로 독립적인 연구가 필수적이다. 먼저 다양한 재료들에 대한 삼각뿔 압입 유한요소해석들로 얻은 하중-변위 곡선들의 특징을 살폈다. 이를 토대로 압입자 반각이 다른 두 삼각뿔 압입자를 이용해 유한요소해석으로 얻은 하중-변위곡선들의 회귀분석으로 재료물성치를 얻는 이중 삼각뿔 압입물성평가 알고리듬을 제시했다. 제안된 물성평가법을 이용하면 다양한 재료에 대해 평균오차 3% 이내로 영률 및 항복강도, 변형경화지수의 예측이 가능하다. In this study, we suggest a method for material property evaluation by dual-triangular pyramidal indenters using the reverse analysis. First, we demonstrated that load-displacement curves of conical and triangular pyramidal indenters are different for the same material. For this reason, an independent research on the triangular pyramidal indenter is needed. From FE indentation analyses on various materials, we then investigated the relationships among material properties, indentation parameters and load-displacement curves. From this, we established property evaluation formula using dual-triangular pyramidal indenters having two different half-included-angles. The approach provides the values of elastic modulus, yield strength and strain-hardening exponent within an average error of 3% for various materials.

구조 변형이 있는 평면 위의 비정상 유동해석을 위한 준-정상 기법

김민수(Minsoo Kim),이남훈(Namhun Lee),이학태(Hak-Tae Lee),이승수(Seungsoo Lee),김헌주(Heon-Ju Kim) 한국항공우주학회 2017 韓國航空宇宙學會誌 Vol.45 No.1

본 논문은 초음속 공탄성(aeroelastics) 해석 시간 절약을 위한 준-정상 축약 모델을 제안하고 이를 검증하였다. 유동이 초음속이고 유동의 특성시간이 구조변형의 특성시간에 비해 작을 경우, 유동의 비정상성이 작아 비정상 유동해 대신 정상 유동해를 이용하여 공탄성 해석을 할 수 있다. 크리깅 기법을 적용하여 유동의 축약모델을 구축하였다. 매 시간 축약모델로부터 예측된 표면해가 구조해석의 경계조건으로 사용되었다. 크리킹 기법을 적용한 축약모델을 비정상해석 결과와 비교하여 검증하였다. In this paper, we present and verify an aerodynamic reduced-order model (ROM) based on a quasi-steady flow method to reduce the computational cost of supersonic aeroelastic analysis. For supersonic flows, especially when the characteristic time scale of the flow is small compared to that of the structural motion, the unsteadiness of flow can be negligible, and quasi-steady solutions can be used instead of the unsteady solutions for the aeroelastic analysis. Kriging method is used to build the ROM of the aerodynamics. The surface solutions from the ROM are used as the boundary conditions for the structural analysis at each time-step. The ROM is validated against the unsteady solutions.

유리 - 유리 정전접합을 이용한 FED 스페이서 기술 개발

김민수(Minsoo Kim),박세광(Sekwang Park),문권진(Kwonjin Moon),김관수(Kwansoo Kim),우광제(Kwange Woo),정성재(Sungjae Jung),이남양(Namyang Lee) 한국진공학회(ASCT) 1999 Applied Science and Convergence Technology Vol.8 No.4(1)

본 논문에서는 Al 박막을 중간층으로 이용한 유리-유리 정전접합기술로서 FED(Field Emission Dispaly)의 스페이서 공정을 개발하였다. Al 박막의 두께가 1000 Å, 2000 Å, 3000 Å, 4000 Å과 5000 Å인 정합 조건에서 유리-유리 정전접합의 특성과 전류 밀도-시간 곡선 그리고 접합력을 측정하였으며, 감광성 유리와(110) 실리콘웨이퍼를 벌크 마이크로머시닝 기술을 이용하여 스페이서의 고정틀로 제작하였다. 스페이서 유리-유리 정전정합으로 맨 유리기판에 스페이서를 형성하였으며, 또한 이를 진공 패널로 제작하여 FED에서의 응용 가능성을 확인하였다. In this paper, spacer process for FED (Field Emission Display) was developed with the glass to glass anodic bonding technology using Al film as an interlayer. Characteristics, current density-time curves and force of the anodic bonding were measured on various thickness of Al film; 1000 Å, 2000 Å, 3000 Å, 4000 Å and 5000 Å. Holders for spacer were fabricated with photosensitive glass and (110) Si wafer by bulk micromachining. Spacers was formed on glass substrate by spacer glass to glass anodic bonding and an evacuated panel was fabricated to prove the potential of application for FED.

고흡수성수지와 팽창재 동시 혼입 시 고강도 모르타르의 수축거동에 미치는 영향

김민수(Kim, Minsoo),홍성걸(Hong, Sung-Gul) 대한건축학회 2019 大韓建築學會論文集 : 構造系 Vol.35 No.12

Superabsorbent polymers(SAPs) are powdery material that absorb water several tens or hundreds of times its own mass. It has been reported that when SAPs are incorporated into a high strength cementitious material, the autogenous shrinkage of the material is reduced. Cross-linked sodium polyacrylate type SAPs are relatively safe for human body and low in production cost. In order to apply this type of SAPs to the admixture for total(plastic+autogenous+drying) shrinkage reduction of high strength mortar, the shrinkage behavior of mortar when an expansion agent(EA) and SAPs were mixed together was analyzed. As a result, it was found that the shrinkage was reduced when an EA 5% (mass % of cement) and SAPs 0.4% were mixed together than the mortar containing only an EA 10%. The shrinkage was further reduced when EA 10% and SAPs 0.4% were incorporated into mortar.

종합설계 교과목 평가요소와 방법

김민수(Minsoo Kim) 한국정보보호학회 2009 情報保護學會誌 Vol.19 No.1

공학교육인증을 실시하면서 설계교육의 중요성을 인지하고 있다. 특히 종합설계의 경우 설계의 기능적 요소와 제한 요소를 반영하도록 하고 있다. 그런데 이전에는 설계교육을 체계적으로 하지 않아서 대학마다 설계교육과 평가방법에 대한 어려움을 가지고 있다. 본 논문에서는 종합설계 교과목의 수행절차와 방법을 제시하고 이에 맞는 평가요소와 평가방법을 제시하고자 한다. 설계 수행절차에서는 설계의 기능적 요소와 제한 요소를 반영하여 설계를 진행하는 과정과 이 때 산출되는 결과물을 제시하여 설계 요소가 반영될 수 있도록 한다. 종합설계 교과목에 대한 평가는 팀별 평가와 개별 평가로 나누고 실제로 수행했던 평가 방법을 제안한다.