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DESIGN OF PORT AND HARBOUR FACILITIES IN JAPAN : New Design Standards and Future Design Development
Shigeo Takahashi 한국해안해양공학회 1999 학술강연회 발표논문초록집 Vol.2 No.1
We introduce current design technology of Japanese port and harbour facilities, i.e., after first briefly describing the technology development of Japanese ports, the development of recently revised Technical Standards for Port and Harbour Facilities are introduced. Also discussed is deformation-based reliability design of the port and harbour facilities; a method which is expected to play an important role in future design technology.
Development of a Wave Absorbing System Using a Liquefied Sandbed
YOON-KOO KANG,SHIGEO TAKAHASHI 한국해양공학회 2006 韓國海洋工學會誌 Vol.20 No.4
A new wave-absorbing system, called the liquefied sandbed wave barrier (LSWB) system, is currently under development at the Port and Airport Research Institute (PARI) of Japan. The wave damping effect by the LSWB system is substantial,as confirmed by small-scale experiments and FEM numerical calculations, i.e., the wave transmission coefficient of the system is less than 0.2. Here, the results of large-scale experiments arediscussed in view of practical application. Although the LSWB system provides high wave damping, nearly equal to theoretical values, difficulty exists in obtaining a homogeneously liquefied sandbed, due to the occurrence of liquefied sandbed compaction by cyclic wave loading, which in turn, reduces excess pore pressure and the wave damping effect. These two phenomena primarily occur when the sandbed is composed of fine sand with small permeability. Based on experimental results, we propose a design method that includes countermeasures against such problems,and a prototype LSWB system is constructed in a very large wave flume at PARI. Wave damping by the prototype LSWB system is confirmed to be quite stable and high, as predicted by theoretical calculations.
NADH - ubiquinone oxidoreductase 저해제인 quinoline 유도체들의 생리활성
조광연,정근회,다까하시노부다까,요시다시게오 한국농화학회 1991 Applied Biological Chemistry (Appl Biol Chem) Vol.34 No.1
New quinoline compounds were designed, synthesized, and examined with sub mitochondria. Most compounds showed high activity against NADH-ubiquinone oxidoreductase. Inhibition activity was mainly affected by the length of the lipophilic part, regardless of bulkiness or to ration of a phenyl group in the side chain. The β-methyl group was demonstrated to be the optimal functionality on tire nuclei of the quinoline derivatives so that either deletion or insertion of a methyiene on the group eliminated its activity(Received January 25, 1991, Accepted Mach 25, 1991).