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임홍서,강용우,변용익,문홍규,한원용 한국우주과학회 2002 Journal of Astronomy and Space Sciences Vol.24 No.1
한국천문연구원 지구접근천체 연구실과 연세대학교 천문대 YSTAR 팀은 해외에 설치될 전천탐 사용 광시야 망원경을 위한 돔 엔클로져(dome enclosure)를 순수한 우리 기술로 제작하였다. 이 돔 엔클로져는 망원경의 빠른 구동특성을 최대한 활용하기 위해 완전 개방형의 구조를 지님과 동시에 다양한 기상 조건에 대응하도록 견고한 구조를 가지도록 설계되었다. 또한, 자동 관측 프로그램과 연동되어 무인 관측 시스템의 한 부분으로도 그 역할을 다하도록 전자 제어부도 함께 설계되었다. 개발된 돔 엔클로져는 현재 남아프리카공화국 천문대 써덜랜드 관측소에 설치되어 성공적으로 가동되고 있다. Near Earth Object Patrol Team (National Research Lab.) at KAO and YSTAR team at Yonsei University Observatory jointly developed a dome enclosure to be installed abroad together with a survey telescope. It has a fully-open clam shell type design to maximize the fast slew capability of the telescope and is also sturdy enough to protect the observation system under extreme weather conditions. We also developed an electric control circuit for the enclosure so that it can become a part of automated observing system. The enclosure has been installed at the Sutherland Observatory of South African Astronomical Observatory in April 2002, and has been successfully operational.
임홍일,Nikola Vladimir,Sime Malenica,조대승 대한조선학회 2017 International Journal of Naval Architecture and Oc Vol.9 No.3
This paper is related to structural design evaluation of 19,000 TEU ultra large container ship, dealing with hydroelastic response, i.e. springing and whipping. It illustrates application of direct calculation tools and methodologies to both fatigue and ultimate strength assessment, simultaneously taking into account ship motions and her elastic deformations. Methodology for springing and whipping assessment within so called WhiSp notation is elaborated in details, and in order to evaluate innovative container ship design with increased loading capacity, a series of independent hydroelastic computations for container ship with mobile deckhouse and conventional one are performed with the same calculation setup. Fully coupled 3D FEM e 3D BEM model is applied, while the ultimate bending capacity of hull girder is determined by means of MARS software. Beside comparative analysis of representative quantities for considered ships, relative influence of hydroelasticity on ship response is addressed.