わが隣人ドストエフスキー : 模倣の欲望をめぐって

application/pdf大阪府立大学紀要（人文・社会科学）. 1999, 47, p.27-40departmental bulletin pape

Measurement of the e+e-→D(*)+D(*)- cross sections

journal articl

デジタル クウカン ジョウ デノ ビジュツ テンジ シナリオ ジドウ セイセイ システム ノ コウチク

奈良先端科学技術大学院大学修士(工学)master thesi

Dynamic epigenetic regulation of OsLTP2 gene expression during seed development of rice

application/pdfWe found wound- and pathogen-responsive ex-pression of OsLTP2 gene in leaves of various Tos17 mutants, whose genome were randomly inserted by retrotransposons, and transgenic rice plants during study of stress responses of rice. We assumed that DNA methylation state of the OsLTP2 promoter was altered in a Tos17 mutant line ND7315, because DNA sequence of the OsLTP2 was completely identical to that in wild type, Nipponbare. It was revealed that the OsLTP2 promoter of Nipponbare was highly methylated, whereas the promoter of ND7315 was completely demethylated, by bisulfite sequencing. These results strongly suggest that the demethyla-tion of OsLTP2 promoter cause the alteration of OsLTP2 ex-pression pattern in Tos17 mutants. In Nipponbare, while no expression of OsLTP2 was observed in vegetative organs and spicules at immediately after flowering, strong expression of OsLTP2 was observed in spicules at 5-15 days after flowering. To examine whether dynamic epigenetic alteration of the pro-moter region regulates the stage specific expression of OsLTP2 or not, we investigated the methylation state of OsLTP2 pro-moter at various stages of spicules and seeds. Prominent alter-ation of DNA methylation level in OsLTP2 promoter was ob-served and the level of DNA methylation was greatly correlated with a level of OsLTP2 expression. The methylation of OsLTP2 promoter region was mostly disappeared in 10-15 days after flowering (DAF) developing seeds, and then it was regenerated to original methylation pattern in embryos of dry seeds. These results suggest that the epigenetic alteration of OsLTP2 promoter was programmed in cells of developing seeds.departmental bulletin pape

き裂エネルギ密度による安定成長き裂の破壊抵抗評価 (第3報, 薄板延性き裂破壊抵抗の板厚効果)

The influence of sheet thickness on the fracture resistance of a stably growing crack evaluated by crack energy density based on the method proposed in the 1st Report is investigated. That is, the experiments of stable growth fracture similar to those in 2nd Report are carried out varying the sheet thickness, and the fracture resistances expressed by additional rate of crack energy density and crack energy density are evaluated. The results are follows: (1) The fracture resistances are almost independent of initial crack lengths and specimen types for any sheet thickness. (2) With the decrease of sheet thickness, the fracture resistance expressed by crack energy density at the initiation of crack growth decreases and, on the other hand, the fracture resistances expressed by crack energy density and additional rate of crack energy density of stably growing cracks increase under the uniform slant fracture mode. These effects of sheet thickness can be explained by considering the admissible types of plastic deformation around a crack tip.journal articl

到来波の偏波特性を利用するアダプティブアレーの特性解析

本論文では， 到来波の偏波特性を利用するアダプティブアレーを提案している． 提案するアダプティブアレーにおいて， その重み係数は， 所望波の偏波に対して直交する偏波成分の電力を最小化することにより決定される． そして， 決定された重み係数を主偏波成分用のアンテナ素子で受信した信号に対して乗算するものである． 本論文では， 提案するアダプティブアレーの構成及び動作原理を示し， 2素子アレーに対して所望波と干渉波の2波が到来している場合の最適ウエート 及びSINRの式を解析的に導出している． 更に， 数値計算により， 本アダプティブアレーの動作特性に対する到来波の偏波特性 及びアンテナ素子の交差偏波識別度の影響を明らかにしている．application/pdfjournal articl