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Pusher-Barge선의 내항성능 및 연결핀에 작용하는 피랑하중추정
홍석원,김영환,Hong, Seok-Won,Kim, Yeong-Hwan 한국기계연구원 1984 기계연구원소보 Vol.12 No.-
대양을 항해하는 Puser-Barge선의 내항성능과 그연결장치에 작용하는 피랑하중을 추정하기위하여,규칙피중 선체운동응답과,파랑하중응답을 Strip이론으로 구하는 해석적인 방법을 개발하였다. 연결장치의 종류로는 2개의 핀으로 연결되는 힌지연결의 경우와, 3개의 핀으로 연결되는 고정연결의 경우를 고려하였다. 이론 계산결과를 확인하기 위한 모형시험을 힌지연결의 경우에 대하여 정면규칙파중에서 실시하였다. 실험결과와 이론계산결과는 비교적 잘 일치하였다.
홍석원,이상무,양승일,Hong, Seok-Won,Lee, Sang-Mu,Yang, Seung-Il 한국기계연구원 1985 기계연구원소보 Vol.14 No.-
A method is described to obtain the first order force and second order steady force on the fixed two dimensional submerged or semisubmerged cylinders at infinite depth of water due to regular waves. The first order diffraction wave velocity potential which describes the flow diffracted by a body is obtained numerically using source distribution method on the mean wetted surface. And a technique to remove the irregular frequency phenomena of the source distribution method is also applied. The second order steady force is calculates by means of direct integration of the pressures on the body as derived from the first order velocity potential and is also computed by means of reflection wave height derives from momentum conservation theory. The results are compared with those of published works, and show good agreement.
홍석원(Hong Seok-Won),신태호(Shin Tae-Ho) 한국주거환경학회 2005 주거환경(한국주거환경학회논문집) Vol.3 No.1
As a corporate management form, REITs(Real Estate Investment Trusts) exist two competing property management style : Internally-managed REITs(Self-administered REITs) and Externally-managed REITs(Externally -advised REITs).<BR> In USA recent studies into management style indicate that Internally-managed REITs do have higher ratios of rental revenue to total revenue, lower payout ratios and lower costs of capital.<BR> Nevertheless, Korean government don"t allowed REITs to obtain Internally-managed REITs. Thus, this study examines impact of difference in two management styles though literature reviews and presents a correct management style for development of REITs.
팜지방산 디스틸레이트의 무촉매 에스테르화 반응특성 연구
홍석원 ( Seok Won Hong ),조현준 ( Hyun Jun Cho ),여영구 ( Yeong Koo Yeo ) 한국화학공학회 2014 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.52 No.3
In this work, the reaction characteristics for the non-catalytic esterification of palm fatty acid distillate wereanalyzed. The esterification reaction was assumed as the pseudo homogeneous 2nd order reversible reaction and ‘reactioneffectiveness factor (η)’ was used to take accounts into evaporation and reaction of water and methanol, which takeplace simultaneously in the liquid phase. The nonlinear programming was used to derive appropriate kinetic parameters,the reaction rate constant and mass transfer coefficient, minimizing the error between experimental data and the numericalvalues. Based on these parameters, the apparent activation energy was calculated to be 43.98 kJ/mol.