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Primary production of filamentous algae in slow sand filter pond by harvest method
Nobutada Nakamoto,M. Sakai 江原大學校 附設 環境硏究所 1992 環境硏究 Vol.9 No.-
All of floating clusters of algal mat was harvested in a slow sand filter pond which was a continuous culture system of a filamentous algae of melosira varians. The real net production of algae per pond was measured in summer. The average net production as organic matter). As a floating cluster was mainly composed of active algae, it may be a good feed for fishes and shellfishes.
Homogenized Properties of Elastic-Viscoplastic Composites with Periodic Internal Structures
Ohno, Nobutada,Wu, Xu 대한금속재료학회(대한금속학회) 1998 METALS AND MATERIALS International Vol.4 No.3
In order to analyze time-dependent deformation of composites with periodic internal structures, the present authors recently developed a homogenization theory based on the two scale expansion of field variables. The theory, which enables us to compute incrementally the time-dependent deformation by discretizing unit cells with finite elements, is effective for problems in which either macro-strain or macro-stress, or a combination of them, is prescribed. In this paper, the theory is described without recourse to the asymptotic expansion by considering the macroscopically uniform case, and then the theory is applied to analyzing transverse elastic-viscoplastic deformation of unidirectional fiber-reinforced composites subjected to a prescribed history of combined macro-strain and macro-stress.