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RISS 인기검색어
- 검색키워드
- 저자 : Nobuhiro Nakano (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
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Satoh, Kayo,Yoshikawa, Nobuhiro,Nakano, Yoshiaki,Yang, Won-Jik Techno-Press 2001 Structural Engineering and Mechanics, An Int'l Jou Vol.12 No.5
A new sort of learning algorithm named whole learning algorithm is proposed to simulate the nonlinear and dynamic behavior of RC members for the estimation of structural integrity. A mathematical technique to solve the multi-objective optimization problem is applied for the learning of the feedforward neural network, which is formulated so as to minimize the Euclidean norm of the error vector defined as the difference between the outputs and the target values for all the learning data sets. The change of the outputs is approximated in the first-order with respect to the amount of weight modification of the network. The governing equation for weight modification to make the error vector null is constituted with the consideration of the approximated outputs for all the learning data sets. The solution is neatly determined by means of the Moore-Penrose generalized inverse after summarization of the governing equation into the linear simultaneous equations with a rectangular matrix of coefficients. The learning efficiency of the proposed algorithm from the viewpoint of computational cost is verified in three types of problems to learn the truth table for exclusive or, the stress-strain relationship described by the Ramberg-Osgood model and the nonlinear and dynamic behavior of RC members observed under an earthquake.
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Inhibitory Effect of Honeybee-Collected Pollen on Mast Cell Degranulation In Vivo and In Vitro
Yasuko Ishikawa,Tomoko Tokura,Nobuhiro Nakano,Mutsuko Hara,Fran?is Niyonsaba,Hiroko Ushio,Yuji Yamamoto,Tadahiro Tadokoro,Ko Okumura,Hideoki Ogawa 한국식품영양과학회 2008 Journal of medicinal food Vol.11 No.1
Bee-collected pollen (bee pollen [BP]) has been used as a folk medicine for centuries against various diseases,including allergy. There is no study elucidating how BP exerts such an anti-allergic effect. Since mast cells play a central rolein the pathogenesis of various allergic diseases, we investigated the effect of BP on mast cell activation elicited by the Fc im-munoglobulin E (IgE) receptor (Fc.RI)-mediated pathways. The in vivo effect of orally administered BP on cutaneous mastcell activation was examined by passive cutaneous anaphylaxis reaction. In vitromast cell degranulation and IgE binding tomast cells and the status of protein tyrosine phosphorylation were examined using bone marrow-derived mast cells. Daily oraladministration of BP to mice significantly reduced the cutaneous mast cell activation elicited by IgE and specific antigens.BP also reduced in vitromast cell degranulation and tumor necrosis factor-. production by inhibiting IgE binding to Fc.RIon mast cells. The inhibitory effect of BP on mast cell degranulation by preventing IgE binding was confirmed by the re-duced levels of protein tyrosine phosphorylation, which occurred as downstream events in activated mast cells via Fc.RI.These results first revealed that the anti-allergic action of BP was exerted by inhibiting the Fc.RI-mediated activation of mastcells, which plays important roles, not only in the early phase, but also in the late phase of allergic reactions.
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