여성 암환자의 가임력 보존 치료

이동윤 대한산부인과학회 2022 연수강좌 Vol.66 No.-

분단과 갈등, 그리고 통일: 독일, 예멘,베트남의 갈등관리 사례 비교

이동윤 통일연구원 2002 統一 政策 硏究 Vol.11 No.2

본 연구는 이미 통일을 이룩한 독일, 예멘, 베트남의 통일과정을 갈등관리의 차원에서 비교고찰함으로써 남북한 통일에 보다 합당한 제반 여건과 갈등관리 방법들을 살펴보고 보다 효과적인 남북한 통일정책의 기본 방향을 제시하는데 목적이 있다 . 이를 위하여 본 연구는 개별 국가들의 갈등관리와 통일과정에 초점을 맞추어 각 사통일 유형 사이의 상관관계를 고찰하였다. 특히 본 연구는 분단국의 갈등관리 방법과 통일 유형을 각 네 가지로 유형화하고, 이를 통하여 개별 국가들의 갈등관리와 통일과정을 고찰함으로써 어떤 갈등관리 방법이 남북한 통일과정에 보다 효과적일 것인가를 각 단계별로 점검하였다. 우선 흡수형 통일을 이룩한 독일의 경우 갈등의 예방과 타결, 해소관리를 통하여 장기적인 갈등관리가 이루어진 결과이며, 합의형 통일을 이룩한 예멘의 경우 단기적인 갈등관리가 상호간의 갈등을 완전하게 치유하지 못함으로써 통일 이후 또 다시 무력적인 방법으로 완전한 통일이 추진된 사례이다. 또한 무력형 통일을 이룩한 베트남의 경우 무력이라는 갈등관리 방법을 사용함으로써 통일 이후 또 다른 내부적 갈등이 초래된 사례이다. 결국 우리는 이러한 개별 국가들의 갈등관리 방법과 통일에로의 전개과정을 구체적으로 비교함으로써 남북한 분단의 갈등을 해소하고 통일을 이룩하기 위한 단계적 갈등관리 방법과 통일정책을 모색해야 할 것이다.

염료감응형 태양전지와 열전발전소자를 결합한 복합 태양전지의 구조 및 특성

이동윤,송재성,이원재,김인성,정순종,Lee, Dong-Yoon,Song, Jae-Sung,Lee, Won-Jae,Kim, In-Sung,Jeong, Soon-Jong 한국전기전자재료학회 2005 전기전자재료학회논문지 Vol.18 No.4

The tandem solar cell composed of a dye-sensitized solar cell (DSC) and a thermoelectric generator (TEG) was designed. In such new cell, the characteristics of DSC and TEG were investigated. DSC uses the wavelength range of 380∼750 nm and has the maximum efficiency of below 10 %. If the solar light transmitted through DSC can be converted to heat energy, TEG can generate electric energy using this heat energy. By this means, it is possible to utilize most of solar energy in the wavelength range of 350∼3000 nm for electric generation and it can be expected to obtain higher solar energy conversion efficiency exceeding the known limit of maximum efficiency. For this purpose we suggest the tandem solar cell constructed with DSC and TEG. In this structure, DSC has a carbon nanotube film as a counter electrode of DSC in order to collect the solar light and convert it to heat energy. We measured the I-V characteristics of DSC and TEG, assembled to the tandem cell. As a result, it was shown that DSC with carbon nanotube and TEG had the efficiency of 9.1 % and 6.2 %, respectively. From this results, it is expected that the tandem solar cell of the new design has the possibility of enhanced conversion efficiency to exceed above 15 %.

EQCM법을 이용한 자기조립된 Viologen 단분자막의 전기화학적 특성 연구

이동윤,박상현,박재철,권영수 대한전기학회 2006 전기학회논문지C Vol.55 No.3(C)

- We fabricated the monolayers onto QCM by self-assembly using viologen, which has been widely used as electron acceptor. A gold electrode of the QCM was cleaned by piranha solution and prepared the ethanol- acetonitrile(1:1) solution with 2 m mol/l viololgen compounding of pure Ar gas. We determined the time dependence to resonant frequency shift during self-assembly process and the electrochemical behavior of the self-assembled viologen monolayers by cyclic voltammetry. With increasing scan rate, the redox peak current of the viologen increased linearly. This was signified that the redox reaction was reversible. The EQCM measurements revealed the anions transfer during redox reactions, respectively. From the EQCM data, the well-defined shape peaks were nearly equal charges by cyclic voltammetry.

범밀도함수법을 이용하여 계산한 IIIB족 원소가 도핑된 ZnO의 전자상태

이동윤,이원재,민복기,김인성,송재성,김양수,Lee, Dong-Yoon,Lee, Won-Jae,Min, Bok-Ki,Kim, In-Sung,Song, Jae-Sung,Kim, Yang-Soo 한국전기전자재료학회 2005 전기전자재료학회논문지 Vol.18 No.7

The electronic states of ZnO doped with Al, Ga and In, which belong to III family elements in periodic table, were calculated using the density functional theory. In this study, the calculation was performed by two Programs; the discrete variational Xa (DV-Xa) method, which is a sort of molecular orbital full potential method; Vienna Ab-initio Simulation Package (VASP), which is a sort of pseudo potential method. The fundamental mixed orbital structure in each energy level near the Fermi level was investigated with simple model using DV-Xa. The optimized crystal structures calculated by VASP were compared to the measured structures. The density of state and the energy levels of dopant elements were shown and discussed in association with properties.

Effects of the Injection Temperature of N₂ Gas on Pressureless Infiltration for Fabricating Al-Mg/Al₂O₃ Composites

이동윤,S. W. Park,이동복 대한금속·재료학회 2008 METALS AND MATERIALS International Vol.14 No.4

Pressureless infiltration of molten Al-Mg alloys into particulate Al2O3 preforms has been known to occur only in a nitrogen atmosphere. In order to understand the pressureless infiltration mechanism of Al-Mg alloys into particulate Al₂O₃ preforms, nitrogen was injected at 25℃ , 300℃, and 600℃. The higher the injection temperature of the nitrogen gas was, the lower the infiltration temperature of the molten Al-Mg alloys into the particulate Al₂O₃ preform was. Pressureless infiltration of the Al-6Mg alloy occurred at 700℃ when the nitrogen gas was injected at 600℃. The formation of an Mg-N compound (Mg₃N₂) on Al₂O₃ particles, which improves wettability by decreasing the interfacial energy between the Al-Mg alloys and the Al₂O₃particles, enabled the formation of the Al-Mg alloy/Al₂O₃ composite via pressureless infiltration. Increasing the injection temperature close to the melting point of the Al-Mg alloys appeared to enhance the formation of Mg₃N₂ on the surface of the Al₂O₃ particles. Pressureless infiltration of molten Al-Mg alloys into particulate Al2O3 preforms has been known to occur only in a nitrogen atmosphere. In order to understand the pressureless infiltration mechanism of Al-Mg alloys into particulate Al₂O₃ preforms, nitrogen was injected at 25℃ , 300℃, and 600℃. The higher the injection temperature of the nitrogen gas was, the lower the infiltration temperature of the molten Al-Mg alloys into the particulate Al₂O₃ preform was. Pressureless infiltration of the Al-6Mg alloy occurred at 700℃ when the nitrogen gas was injected at 600℃. The formation of an Mg-N compound (Mg₃N₂) on Al₂O₃ particles, which improves wettability by decreasing the interfacial energy between the Al-Mg alloys and the Al₂O₃particles, enabled the formation of the Al-Mg alloy/Al₂O₃ composite via pressureless infiltration. Increasing the injection temperature close to the melting point of the Al-Mg alloys appeared to enhance the formation of Mg₃N₂ on the surface of the Al₂O₃ particles.

신라 지배집단의 국가 운영 원리를 追究하다 (김희만, 『신라의 왕권과 관료제』, 경인문화사, 2019)

이동윤 부경역사연구소 2020 지역과 역사 Vol.- No.46

SAW 필터용 ZnO 압전 박막의 전기적 특성

이동윤,윤석진,Lee, Dong-Yoon,Yoon, Seok-Jin 한국전기전자재료학회 2005 전기전자재료학회논문지 Vol.18 No.10

The structural and electrical property of RF magnetron sputtered ZnO thin film have been studied as a function of RF power, substrate temperature, oxygen/argon gas ratio and film thickness at constant sputtering power, sputtering working pressure and target-substrate distance. To analyze a crystallo-graphic properties of the films, $\theta$/2$\theta$ mode X-ray diffraction, SEM, and AFM analyses. C-axis preferred orientation, resistivity and surface roughness highly depended on oxygen/argon gas ratio. The resistivity of ZnO thin film(6000 ${\AA}$) rapidly increased with increasing oxygen ratio and the resistivity value of $9 {\ast} 10^7 {\Omega}cm$ was obtained at a working pressure of 10 mTorr with the same oxygen/argon gas ratio. The surface roughness was also improved with increasing oxygen ratio and the ZnO films deposited with the same oxygen/argon gas ratio showed the excellent roughness value of 28.7 ${\AA}$. With increase of the substrate temperature, The C-axis preferred orientation of ZnO thin film increases and the resistivity decreases due to deviation from the stoichiometric ZnO due to oxygen deficiency.

Characteristics of Nano-crystalline TiO2 Dye-sensitized Solar Cells having Counter Electrodes with Different Preparing Process

이동윤,이원재,송재성,김희제,Bo-Kun Koo,Hyun-Ju Kim 한국전기전자재료학회 2005 Transactions on Electrical and Electronic Material Vol.6 No.5

The Pt counter electrode of a dye-sensitized solar cell (DSSC) plays a role in helping redox reaction of iodine ions in electrolyte, also, transferring electrons into electrolyte. In this case, it is expected that characteristics of Pt electrodes strongly depend on fabrication process and its surface condition. In this study, Pt electrodes were prepared by a electro-deposition and a RF magnetron sputtering. Electrochemical behavior of Pt electrodes was compared using cyclic-voltammetry and impedance spectroscopy. Surface morphology of Pt electrodes was investi-gated by FE-SEM and AFM. I-V characteristics of DSSC were measured and discussed in association with the surface properties of counter electrode. As a result, electrochemical properties of electro-deposited Pt electrode were superior to that of sputtered Pt electrode. This is likely that enlarged area of surface in electro-deposited Pt electrode in comparison with the case of sputtered Pt electrode play a role in enhancing such electrochemical properties.

생식내분비학 : 골다공증의 진단과 치료

이동윤 대한산부인과학회 2015 연수강좌 Vol.53 No.-