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Ogita, Sacchio The Korean Society of Ginseng 1990 Journal of Ginseng Research Vol.14 No.2
The climacterium is that phase in the aging precess during which a woman passes from the reproductive to the non-reporductive stage. The signals, such as hot flashes, vaso-motoric disturbances, perspiration, stiff shoulders, emotinal symptoms, are refered to as climacteric disturbances. Treatment of climacteric symptoms centers around estrogen replacement and transfuilizers, but there are many problems to be solved to use these hormones/drugs as far as dossage, duration and complications are concerned. The care of women during the climacteric years should provide relief of distressing symptoms with as high a degree of safety as possible. From this view point, we used red ginseng powder to those patients with high menopausal index successfully. We studied its mechanism of action and proved that red ginseng improved the micro-circulation system via improvement of erythrocyte reformability which enhanced sex steroidgensis consequently.
Accurate and Verified Computation of Matrix Determinant
Takeshi Ogita 대한전자공학회 2009 ITC-CSCC :International Technical Conference on Ci Vol.2009 No.7
This paper is concerned with numerical computations of matrix determinants. An algorithm for computing an accurate and verified matrix determinant is proposed using matrix factorizations. First, an algorithm for relatively well-conditioned problems are introduced. Next, extremely ill-conditioned cases are treated. For the purpose, an accurate algorithm for an inverse LU factorization is used. By these algorithms, accurate results of the matrix determinants can efficiently be obtained for much wider range of problems. Numerical results are also presented.
Fast Filter for Verified Convex Hull and its Performance
Katsuhisa Ozaki,Takeshi Ogita,Shin’ichi Oishi 대한전자공학회 2009 ITC-CSCC :International Technical Conference on Ci Vol.2009 No.7
This paper is concerned with accurate algorithms in computational geometry. We propose fast algorithms to obtain an exact convex hull for a set of points on two-dimensional space. We call them verified algorithms. We improve a criterion for a fast verified algorithm which is called ’filter’. Finally, numerical examples show that computing times for verified algorithms are comparable to those for non-verified algorithms in many cases.