급냉 연속 주조된 페라이트 스테인레스강 판재의 조직 및 인장성질에 미치는 Cr 함량의 영향

오명석,전병완,이태행,조성석 ( Myeong Suck Oh,Byeong Whan Jeon,Tae Haeng Lee,Seong Seock Gho ) 한국주조공학회 1988 한국주조공학회지 Vol.8 No.1

Using the twin-roller type melt-quenching technique, we investigated the effect of Cr content on the microstructure and tensile properties of ferritic stainless steels, whose thickness is 0.5㎜ has been investigated. In this experiment, the three kinds of ferritic stainless steels has been used. The predicted cooling rates of melt-quenched ferritic stainless steels were not changed, even the Cr content increases up, to 25%. The metastable phase of the melt-quenched ferritic stainless steels were changed depending upon the car Cr content. In case of 17% Cr steel, the metastable phase was martensite and in case of 20 and 25% Cr steel, the metastable phase was austenite. After heat treatment, the tensile properties of the melt-quenched stainless steels are better than those of conventional ferritic stainless steels.

고압에서의 나트륨계 흡수용액의 이산화탄소 흡수특성

오명석(Oh, Myoung-Seog),이진우(Lee, Jin-Woo),차왕석(Cha, Wang-Seog) 한국산학기술학회 2009 한국산학기술학회논문지 Vol.10 No.3

나트륨계 흡수용액의 이산화탄소 흡수특성을 알아보기 위하여 회분식 기-액 흡수평형 반응기를 이용하여 Na₂CO₃ 5%, 10%, 15%, 20% 수용액에 대한 이산화탄소 흡수능 및 초기흡수속도를 측정하였으며 반응온도는 40℃이였다. 또한, 알칼리염계 흡수제(KHCO₃, CaCO₃, K₂CO₃)들의 혼합에 따른 초기흡수속도를 비교하였다. 농도에 따른 실험결과 10%의 Na₂CO₃에서 가장 좋은 흡수능 및 흡수속도를 보였고, 알칼리염계 흡수제들 중에서 K₂CO₃와 혼합할 때 흡수속도가 다소 증가되었다. Na₂CO₃ 5% 용액의 초기흡수속도를 개선시키기 위하여 Pz와 Pp를 각각 첨가하여 실험한 결과, 증진제를 첨가함으로써 초기흡수속도를 증가시킬 수 있었다. The absorption capacity and initial absorption rate in 5 %, 10 %, 15 % and 20 % Na₂CO₃ under the constant temperature at 40℃ and the initial absorption rate in mixture of different alkaline salts such as KHCO₃, CaCO₃ and K₂CO₃ were measured using batch type stirred cell contractor. 10 % Na₂CO₃ showed the highest absorption capacity and Na₂CO₃ and K₂CO₃ showed the somewhat increased absorption capacity and initial absorption rate respectively. Further more, we have studied the effect of adding Pz and Pp to Na₂CO₃. The result showed that absorption rate of CO₂ was increased by adding these additives.

ABR과 UBR 서비스 상에서의 TCP 프로토콜의 성능 개선

오명석(Myong-Suk Oh),전흥진(Heung-Jin Jeon),육동철(Dong-Cheol Yuk),박승섭(Seung-Seob Park) 한국멀티미디어학회 1999 한국멀티미디어학회 학술발표논문집 Vol.1999 No.2

H.264/AVC의 효율적인 파이프라인 구조를 적용한 CABAC 하드웨어 설계

오명석(Myung-Seok Oh),이원재(Won-Jae Lee),정윤호(Yun-Ho Jung),김재석(Jae-Seok Kim) 대한전자공학회 2007 대한전자공학회 학술대회 Vol.2007 No.11

This paper proposes CABAC Encoder for H.264/AVC using efficient pipelined architecture. The proposed architecture has two techniques to implement efficient pipelined architecture. The one is reducing pipeline latency by calculating probability quickly. The other is fully pipelined implementation when the type of the encoded symbols is LPS. By adapting two techniques, the processing time of the proposed architecture is reduced by about 27% compared with the previous architecture.

당대(唐代) 혼속고(婚俗考) : 『양당서(兩唐書)』「열녀전(列女傳)」을 중심(中心)으로

오명석 ( Myung Seok Oh ) 충남대학교 인문과학연구소 2008 인문학연구 Vol.35 No.2

말레이 농촌사회의 가족농과 상속

오명석(Myung Seok Oh) 한국농촌사회학회 1999 農村社會 Vol.9 No.-

본 논문의 목적은 말레이 가족농의 재생산과정과 상속간의 연관성을 밝히는데 있다. 필자는 크게 두가지의 문제를 제기하였다. 첫째, 말레이 상속법의 역사적 고찰이 필요하다는 것이다. 기존의 연구자들은 말레이 아닷(관습법)과 이슬람법에서의 상속규범을 고정적인 법체계로 간주해 온 경향이 있다. 하지만, 아닷과 이슬람법은 영국의 식민체제 속에서 새롭게 규정됨으로써 말레이 상속법은 식민적 변용을 경험하였다는 점에 주목하였다. 둘째, 상속의 법적, 규범적 측면은 상속의 실제적인 관행 또는 상속의 실천을 이해하는데 제한적인 설명력밖에 가질 수 없음을 밝히고자 하였다. 상속의 실천을 이해하기위해서는 상속자의 범위와 유산의 분배율에 대한 법적 규정을 넘어서서, 상속의 시점, 소유권과 구분되는 사용권의 분배와 양도, 상속자간에 분배된 유산의 처리방식 등을 고려하는 것이 필요하다. 이 연구에서는 상속의 과정을 가족농의 발전주기단계와 연관시켜서 보고자 하였는데, 이때 상속의 시점과 사용권의 분배와 양도는 핵심적인 부분이라고 할 수 있다. 또한 개별가구의 독특한 조건, 예를 들어 가족의 크기와 구성, 보유토지의 규모, 자녀의 이주와 비농업부문에의 취업 등이 상속의 실천에 영향을 미치는 양상이 가장 잘 드러나는 것도 상속과정의 이러한 측면에서임을 제시하였다. This paper deals with the relations between the inheritance system and the process of reproduction of family farm in Malay rural society. Malay rubber smallholders on whom this research is based can be defined as small commodity producers as they sell all the products to market. Seen from the organization of production, however, they remain family farm in the sense that familial relations determine, to an important degree, the nature of land ownership, labor organization, and distribution of products. This study focuses on the inheritance system, for it clearly shows how familial relations intervene in farm organization as it regulates the ways of the distribution of ownership and usufructs of family property through generations. There are two major issues which I try to raise in this study. First, it is necessary to understand the Malay inheritance system from a historical view. Previous studies tend to regard the Malay inheritance norms defined in both Malay adat (customary law) and the Islamic law as a fixed system. But, it is important to note that the status and roles of Malay adat and the Islamic law regarding inheritance had experienced great changes during the British colonial administration. Second, I try to show that legal or normative aspects of the inheritance system have only limited relevance for explaining the actual practices of inheritance among Malay peasants. To understand the latter, it is necessary to consider the timing of the actual occurrence of inheritance, th distribution of usufructs rights, and the management of distributed properties among the inheritors, which are not clearly defined in the inheritance law. If we see the process of inheritance as closely related to the family developmental cycles, the timing of the actual occurrence of inheritance and the distribution of usufructs rights become crucial aspects of the practice of inheritance. It is also shown that the specific conditions of individual family farm, such as the size and composition of family, the amount of land ownership, migration and off-farm incomes of family members have significant effects on the practice of inheritance, if not on the inheritance law itself.

ATES 열펌프 시스템 성능 및 경제성 분석에 관한 연구

오명석(Myungsuk Oh),최종민(Jong Min Choi) 대한설비공학회 2012 설비공학 논문집 Vol.24 No.4

The aim of this study is to investigate the performance of a heating and cooling system with aquifer thermal energy storage(ATES heat pump system) known as one of the underground thermal energy storage application systems. The ATES system was composed of heat pump unit and ATES, which was installed in a factory building located in Anseoung. The system represented very high heating and cooling performance, and showed nearly constant COP at each heating and cooling season due to the stability of EWT. The economic analysis about an ATES system and a conventional system was also executed. The conventional system adopted an air-conditioner in the summer season and a LNG boiler in the winter season. The payback period of the ATES system was estimated by 6.62 years.

연소전 조건에서 알칼리염계 흡수제의 CO₂ 흡수특성

오명석(Oh, Myoung-Seok),백근호(Back, Guen-Ho),차왕석(Cha, Wang-Seog) 한국산학기술학회 2008 한국산학기술학회 학술대회 Vol.- No.-

주요 온실가스인 이산화탄소를 회수 및 저장(Carbon Capture and Storage)하는 기술은 주로 적은 CO₂농도를 가지는 연소후 포집공정이 개발 및 적용되었으나, 최근에는 보다 적극적으로 이산화탄소를 분리하기 위하여 연소전 석탄가스화복합발전(IGCC)과 같은 공정에 적용하여 반응공정 중에 생성되는 높은 농도의 CO₂를 분리하는 공정이 선진국을 중심으로 활발히 연구가 진행되고 있다. 본 연구에서는 고압의 연소전 조건에서 아민계보다 흡수속도는 느리나 생성가스에 유입되는 O₂, SOx, NOx에 의한 부반응 현상, 휘발에 의한 손실, 열적 열화현상이 나타나지 않는 알칼리염계 흡수제의 CO₂ 흡수특 성에 대하여 연구하였다.

절삭공구의 열변형 오차 및 절삭력 변형 오차에 관한 연구

오명석(Myung-Seok Oh),윤인준(In-Jun Yoon),백대균(Dae-Kyun Baek) 한국산업융합학회 2002 한국산업융합학회 논문집 Vol.5 No.4

This paper presents a method to predict tool deflection induced by the thermal distribution and the cutting force using FEM in milling operation. The thermal distribution of cutting tool was predicted using FEM after measuring the temperature of the end of tool and of the tool holder. The thermal deflection of cutting tool was predicted using FEM as well. The tool deflection induced by the cutting force was analyzed with the solid model of cutting tool. An end mill tool caused most of tool deflection comparing to tool holder. Most of thermal deflection came from Z-direction and most of tool deflection induced by the cutting force came from X and Y direction. Precision cutting will be accomplished when tool locations are generated considering the thermal deflection of cutting tool and the tool deflection induced by the cutting force in CAD/CAM.

선삭시 미스트 발생특성에 미치는 절삭변수의 영향

오명석(Myung-Seok Oh) 한국산업융합학회 2004 한국산업융합학회 논문집 Vol.7 No.1

The presence of cutting fluid for cutting tool and workpiece leads a temperature decrease, and reduces tool wear and residual stress. Moreover, it disposes chips from cutting area, and reduces thermal distortion. However, in manufacturing, cutting fluid used in cutting process is undesirable for both human and environmental aspect. Also, it's not economic for cutting cost.<br/> This paper studied experimentally the effects of cutting parameters on the characteristics of mist generation in turning. The results of experiment are as follows: 1) The more severe cutting conditions the more mist generate, 2) The ratio of weight concentrations of cutting fluid nearly have no an effect on the amounts of mist generation 3) The size of SMD is not affected by cutting parameters.