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정다연(Dayeon Jeong),오민재(Min-Jae Oh),김관훈(Gwanhoon Kim) (사)한국CDE학회 2022 한국CDE학회 논문집 Vol.27 No.4
In the initial hull form design process, a hull form surface is essential for mesh generation and model ship for hydrodynamic analysis. In the current shipyard, when generating a hull form surface, a commercial program is used to generate the hull form surface by manual work of the worker. As it relies on manual work, there is a different in hull form surface depending on the maturity of the worker. In addition, there is a problem in that variating the hull form requires a lot of time because the hull form surface must be regenerated. Therefore, this paper proposes a method of automatically generating hull form surface from a given wireframe. A method is proposed for generating a suitable hull surface using the Skinning surface, Trimmed surface, Coons patch, and Gordon surface for each compartment. The hull form surface generated using the proposed method was verified by comparing the hull form surface used in the actual shipyard with the results of hydrodynamic analysis. As a result, the quality of the hull form surface was sufficient to generate a mesh for hydrodynamic analysis, and the actual usability in the shipyard was confirmed.
정다연 ( Dayeon Jeong ),전지민 ( Jimin Jeon ),김우현 ( Woohyun Kim ),조남철 ( Namchul Cho ) 공주대학교 문화재보존과학연구소 2023 문화재과학기술 Vol.18 No.1
본 연구는 용인 신갈 출토 목관의 표면에 도포된 적색 물질의 과학적 분석을 통해 우리나라 고대 안료의 사용과 제작 방법을 연구하였다. 분석 대상 시료는 휴대용 XRF를 사용하여 적색 물질의 성분을 알아보았으며, 실체현미경과 SEM-EDS 분석을 통해 표면의 세부 상태 및 단면구조를 확인하였다. 실체현미경으로 관찰한 결과, 표면에는 흙 등의 이물질과 적색 물질이 혼합되어 있었으며, 단면 관찰을 통해 적색 물질이 일정한 두께로 도포되어 있음을 확인하였다. XRF와 SEM-EDS 분석 결과, HgS와 CaCO<sub>3</sub>이 서로 혼합되어 있음을 알 수 있었다. 결과적으로, 용인 신갈에서 출토된 목관은 표면에 진사(HgS)를 사용한 적색 물질과 바탕물질로 호분(CaCO<sub>3</sub>)을 혼합하여 일정한 두께로 표면에 도포하였음을 확인하였다. This study investigated the use and manufacturing methods of ancient pigments in Korea through the scientific analysis of red materials applied to the surface of wooden coffin excavated in Shingal, Yongin. The sample was analyzed using a Portable XRF to determine the composition of the red materials, and the detailed condition and cross-sectional structure of the surface were confirmed using a Optical Microscope and SEM-EDS analysis. Observations with a Optical Microscope revealed that the red materials were mixed with foreign substances such as soil on the surface, and cross-sectional observations confirmed that the red materials were applied with a certain thickness. XRF and SEM-EDS analyses revealed that HgS and CaCO<sub>3</sub> were mixed with each other. As a result, it can be seen that the wooden coffin excavated in Shingal, Yongin used HgS as reddish materials on the surface and CaCO<sub>3</sub> as a base material, which were mixed and applied to the surface with a certain thickness.