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권순규,최균,김병익,황진하,Kwon, Soon-Gyu,Choi, Kyoon,Kim, Byung-Ik,Hwang, Jin-Ha 한국세라믹학회 2006 한국세라믹학회지 Vol.43 No.4
Metal-Induced Crystallization (MIC) of amorphous silicon (a-Si) using aluminum and nickel as catalysts were performed with a variation of metal thickness and temperature. Raman results showed that the crystallization of a-Si depended on the thickness of aluminum while not on nickel. Nickel that forms silicide nodules during annealing simply catalyzed the formation of crystalline silicon (c-Si) while aluminum was consumed and transferred during MIC, which resulted in more complex microstructural characteristics. Crystalline silicons after NIC had elongated shape with a twin along the long axis. Morphological change after Aluminum-Induced Crystallization (AIC) showed more equiaxial grains. The nucleation and growth mechanism of AIC was discussed.
한국형 달탐사선 개발을 위한 탐사선의 자세제어 및 항법 기술에 관한 현황 연구
권순규,김우성,고상호,이상철,류동영,주광혁,Kwon, Soon-Kyu,Kim, Woo-Sung,Ko, Sang-Ho,Lee, Sang-Chul,Rew, Dong-Young,Ju, Gwang-Hyeok 항공우주시스템공학회 2010 항공우주시스템공학회지 Vol.4 No.3
After the first successful Apollo program, many countries around the world launched their own programs for exploring the moon. This paper surveys various navigation and attitude control systems of several past lunar exploration programs for the purpose of preparing a program for the first Korean lunar probe. For this first we investigate successful programs by introducing the sensors and actuators used for these programs, particularly focusing on those of Clementine and SMART-1 of USA and EU, respectively. Then based on the study, we suggest the necessary components of navigation and attitude control systems suitable for our lunar probe program.
권순규,최균,피재환,최의석,Kwon, Soon-Gyu,Choi, Kyoon,Pee, Jae-Hwan,Choi, Eui-Seok 한국세라믹학회 2005 한국세라믹학회지 Vol.42 No.2
용매열법으로 출발물질의 농도를 변수로 차여 $BaTiO_3$ 분말을 합성하였다. 평균입자크기는 출발물질의 농도에 따라 비례하였는데 TiO_2를 기준으로 1/16M 농도에tj 59nm이었고 1/2M 농도에서는 89nm까지 증가하였다. 평균입자 크기가 89nm인 BT 분말에 대하여 리트벨트법에 의하여 분석한 결과 상분율은 정방정상 $75.5\%$이었고, 격자상수는 정방정상은 a=0.3999(nm), c=0.40319(nm)이고, 입방정상은 a=0.4015(nm)이었다. 이 분말을 $500^{\circ}C$ 1시간 열처리 후 TEM분석을 한 결과, 분말 내부에 수산 이온들이 거의 존재하지 않음을 확인하였다. Barium Titanate (BT) powders were synthesized by solvothermal method with an ethanol as a solvent. The average particle size was increased with the feedstock concentration: the size was 59 nm at $6.25{\times}10^{-2}$ M and 89 nm at 0.5 M. The sample obtained at 0.5 M concentration was analysed by Rietveld refinement and the mole fraction of tetragonal phase was $75.5\%$ and lattice parameter of tetragonal phase was a=0.3999 (nm), c=0.4032 (nm), and cubic phase was a=0.4015 (nm). TEM analysis for the samples with condition of annealing at $500^{\circ}C$ for I h showed that hydroxyl ions on oxygen sites were not found for these experimental conditions.
반사회적 이중매매에 있어서 불법성의 비교를 통한 제1매수인의 보호범위 획정
권순규(Kwon, Soon Kyu),정상현(Jung, Sang Hyun) 성균관대학교 법학연구소 2010 성균관법학 Vol.22 No.2
Quand la seconde(ou dernière) vente était illegal en vente double, les jurisprudences coréennes et la plupart des savants coréens pensent que l'on doit protéger la première vente. Pour cela, il y a des arguments varies : l'action oblique etc. Mais beaucoup de savants sont contre la solution par l'action oblique que les jurispredences coréens présentaient ses opinions pour protéger le premier acheteur. Parce que si la seconde vente était nulle, par ‘Nemo auditur propriam turpitudinem allegans', il n'y a pas de créance que le premier acheteur peut exercer par l'action oblique. Et les résultats juridiques entre le premier acheteur et le second acheteur peuvent être différents(Tout ou Rien) selon la jugement des faits sur ‘estimation de l'antisocialité'. C'est la raison pour laquelle les savents sont contre la solution par l'action oblique aussi. Alors, pour résoudre ce problème, on doit accepter la thèorie de ‘Comparaison de l'illégalité'. C'est-à-dire, on ne doit pas appliquer la première phrase de l'article 746 du Code civil coréen et je pense que l'important est de estimer l'illégalité remarquable. Donc on doit accepter l'action oblique du premier acheteur pour vendeur dans le cas où l'illégalité du second acheteur serait très remarquable que l'illégalité de vendeur, par conséquant, on peut protéger le premier acheteur. Sinon, le premier acheteur ne peut pas exercer l'action oblique, donc il ne peut pas avoir le droit de propriété. Et seulement c'est possible qu'il demande l'indemnité sur le contrat nul.
권순규(Soon-Kyu Kwon),이성욱(Seong-Wook Lee),한동섭(Dong-Seop Han),한근조(Geun-Jo Han) 한국항해항만학회 2006 한국항해항만학회 학술대회논문집 Vol.1 No.-
본 연구는 풍하중이 컨테이너 크레인에 작용할 때, 풍향에 따라서 컨테이너 크레인의 유동장을 분석하였다. 본 연구를 위해 사용된 모델은 50ton급 컨테이너 크레인으로 현재 항만시설에 가장 많이 사용되는 모델이다. 유동장은 원통으로 모델링하였으며, 직경, 300m, 높이 200m로 설정하였다. 본 연구는 멱급수를 적용하여 풍속 50m/s의 설계 기준에서 고도에 따라 풍속을 고려하였다. 또한 풍향은 0˚~180˚를 30˚ 간격으로 적용하였으며, CFX-10을 사용하여 전산유동해석을 수행하였다. 본 연구에서는 풍향에 따른 풍압력을 분석하였으며, 향후 유동 연성 해석을 통한 컨테이너 크레인의 구조 안정성 평가를 할 것이다. This study analyzed the fluid state around a container crane according to a wind direction when a wind load was applied to a container crane. The container crane for this research is a model of a 50-ton class used broadly in the current ports. This dimension of an external fluid field set up diameter, 300m, height, 200m. This study considered the change of a wind velocity according to an altitude in a criterion of a wind velocity, 50m/s, applying a power series law. An incident angle applied to an interval of 30 degrees in 0˚~180˚ and this study carried out a computation fluid dynamics using a CFX-10. In this study, we indicate the wind pressure according to the height and section figure of each member. In addition, we suggest the wind pressure according to a wind direction. And we will analyze the structure stability of a container crane from the fluid-ductile analysis in the next study.
풍속 증가에 따른 풍하중이 컨테이너 크레인의 구조 안정성에 미치는 영향
권순규(S. K. Kwon),한근조(G. J. Han),한동섭(D. S. Han),이성욱(S. W. Lee) 한국정밀공학회 2006 한국정밀공학회 학술발표대회 논문집 Vol.2006 No.5월
This study is carried out to analyze the stability of a container crane in according to the change of a wind direction and a machinery house location when a wind load of a wind velocity, 75㎧ was applied on the state stowing a container crane by a heavy wind. A design wind load applied to this study was calculated in observance of "Load Criteria of Building Structure". And we analyzed the reactions of each supporting points according to appling a wind direction to an interval of 10 in 0°~180° and the structure stability of a container crane according to changing a machinery house location occupying 15% of a container crane weight. From a results of this study, we presented a design criteria of an overturning disturbance equipment, tie-down
On-Off 제어기를 이용한 가변추력 고체추진 기관의 압력제어
권순규(Soonkyu Kwon),김영석(Youngseok Kim),고상호(Sangho Ko),서석훈(Seokhoon Suh) 한국추진공학회 2011 한국추진공학회 학술대회논문집 Vol.2011 No.11
고체추진기관은 구조가 비교적 간단하고 장기적 저장성이 우수한 반면에 일반적으로 추력의 조절 등에 한계성을 가지고 있다. 본 논문에서는 구현의 용이함과 에너지 효율성이 좋은 on-off 제어기법을 이용한 가변추력 고체추진 기관의 압력 제어를 위한 제어기를 소개한다. 연소기 내 압력제어를 위해 질량보존만을 고려한 추진기관의 연소기 내 압력변화 모델에 대하여 고전적인 비례-적분 제어기와 같은 연속적 제어 기법과 PWM, PWPFM과 같은 on-off 제어기를 설계하고 시뮬레이션을 통해 결과를 비교한다. Solid propulsion systems have simple structures compared to other propulsion systems and are suitable for long-term storage. However the systems generally have limits on control of thrust levels. In this paper we introduce controllers for combustion chamber pressure using on-off control techniques which have been known for relatively easy implementation and energy efficiency. For this, we use a simple pressure change model by considering only mass conservation within the combustion chamber and we design a classical controllers and on-off controllers with are Pulse Width Modulation(PWM) and Pulse Width Pulse Frequency Modulation (PWPFM). Then we compare the performance results of the controllers through numerical simulations.
권순규(Kwon, Soon-Gyu),최형준(Choi, Hyong-Jun) 한국체육과학회 2018 한국체육과학회지 Vol.27 No.5
This study aims to figure out if there is any significant difference depending on the subjects, time types of umpire agreed judgment calls made during the 2014, 2015 and 2016 Korean Professional Baseball leagues. Actual cases of judgment call were collected from the entire games over the past three years. There have been 109 calls out of 217 games in 2014, 408 calls from 720 games in 2015, and 709 calls out of 720 games in 2016. With Excel 2014, frequency analysis was carried out on the data and the results are as under. Firstly, it has been demonstrated that judgment calls were requested regardless of the time such as the beginning, the middle or the later part of games. Calls have a low chance of success in the middle and the end of games compared to the beginning. This means that bad calls were made more often in the beginning of games. second, out of the seven subjects which needed to make a judgment call in Korean baseball games, “out” or “safe” decisions were predominately requested at all the 2014, 2015 and 2016 seasons. It can be confirmed that the out or safe situation out of the seven call subjects has the greatest effect on games. In conclusion, the content of umpire agreed judgment calls made at Korean professional baseball games could be quantified through frequency analysis. These outcomes can be the basic data of various studies on judgment calls (video assistant referees system) to develop diverse subjects of further studies.