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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.
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.
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.
『전체주의의 기원』 다시 읽기 : 교육적 함의와 현재성을 중심으로
김민수(Kim, MinSoo) 한국역사교육학회 2022 역사교육연구 Vol.- No.42
본 논문은 한나 아렌트의 기념비적인 저작인 『전체주의의 기원』에서 교육적 함의를 발견하고, 이를 통해 저작의 현재성을 찾아내는 것을 목표로 한다. 오랫동안 반공주의적 프로파간다로 오해되어 온 『기원』이 교육적 함의를 지닐 수 있는 이유는 아렌트가 저술의 목표로 제시한 전체주의에 대한 “이해”의 의미 때문이다. 아렌트의 “이해” 개념은 인류가 짊어져야 할 자기 시대의 짐을 직시하고 의식적으로 떠맡는 것을 의미하는데 이는 역사적 현상을 지나간 과거가 아니라 더 나은 미래를 위한 현재의 노력의 토대로 삼는 방식이다. 『기원』은 홀로코스트라는 역사적 사건이나 전체주의에 대한 단순한 설명을 제시하는 것이 아니라 인간 존엄성과 인간다움을 상실하도록 만든 근대의 역사적 조건을 인식하고 그 한계를 넘어서야 한다는 것을 보여주는 교육적 의미를 지닌다. 아렌트가 전체주의라는 역사적 경험을 통해 제시하고 있는 능동적인 시민주체, 인권의 재발견, 사회적 관계의 복원이라는 시대적 과제가 여전히 우리의 과제이기도 하다는 점에서 『기원』은 교육적 의미와 더불어 충분한 현재성을 지니고 있다고 할 수 있다. This paper aims to discover the educational implications of Hannah Arendt s monumental work, The Origins of Totalitarianism, and to find the current meaning of it. The reason why Origins, which has long been misunderstood as anti-communist propaganda, may have educational implications is that this work aims to “understand” totalitarianism. Arendt s concept of “understanding” means facing and consciously taking on the burdens of our own times that mankind must bear, in a way that makes historical phenomena the basis of present efforts for a better future, rather than the past. Origins does not provide a mere explanation of the historical event of the Holocaust or totalitarianism but has an educational significance to show that we must recognize and overcome the limits of modern historical conditions that have caused the loss of human dignity and humanity. The tasks such as the active civic subject, the rediscovery of human rights, and the restoration of social relations, that Arendt presented through the historical experience of totalitarianism, are still our tasks. Therefore, it can be said that Origins has sufficient current meaning with educational significance.
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.
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.
김민수(Minsoo Kim),고영환(Younghwan Ko),오세기(Saikee Oh) 대한설비공학회 2019 대한설비공학회 학술발표대회논문집 Vol.2019 No.-
This study aimed to compare the design change and option of driving part of R410A application model with R32 application model. The capacity of R32 is larger than that of R410A, but the load of R32 is also larger than that of R410A. So when we adopt R32 in R410A system, we should change the design or option of driving part to improve the efficiency. The window air-conditioners use continuos velocity compressor, so displacement of compressor should be changed to improve the efficiency of air-conditioner. And the models that use inverter compressor don’t have to change the design of compressor but should change the option of driving part such as hz of compressor or pulse of electronic expansion valve. The heat transfer coefficient and pressure drop of R32 are larger than those of R410A, but the mass flow rate of R32 system is lower than R410A system, so the effect is compensated. Also temperature glide of R410A is lower than 0.1oC, so it can be regard as pure refrigerant. Thus, there’s no big difference of heat exchanger.
LMS 알고리즘을 이용한 RF 중계기의 궤환 간섭신호 제거 시스템(Interference Cancellation System)
김민수(Minsoo Kim),안성수(Sungsoo Ahn) 대한전자공학회 2008 電子工學會論文誌 IE (Industry electronics) Vol.45 No.1
본 논문은 RF 중계기에서 발생되는 궤환 신호로 인한 발진현상을 제거하는 간섭제거 방법을 제시한다. 본 논문에서는 LMS(Least Mean Square) 알고리즘을 이용하여 궤환 신호를 추정하고, 그에 상응하는 감쇄신호를 만들어 간섭을 제거하도록 하였다. 본 제안 방법을 이용하여 도플러(Doppler) 주파수를 변화시키면서 성능시험을 수행한 결과 궤환 신호를 상쇄시키는 -30㏈의 감쇄신호를 발생시켜 발진을 방지할 수 있었다. This paper presents a new interference cancellation method to remove the oscillation due to feedback signal of RF relay. In this paper, we estimate the feedback signal using to LMS(Least Mean Square) algorithm and remove the interference through attenuation signal arbitrary corresponding to feedback signal. From the various performance analysis for various doppler effects, a proposed method prevents from oscillation using -30㏈ attenuation signal as a cancellation value of feedback signal.