Effects of Seed Size and Chemical Variation on Seed Fates in a Deciduous Oak Species Quercus serrata

Symposium Pape

Relationships between the Use and Environment of an Unagi-nonedoko-like Green Space in Downtown Kyoto City

It is becoming necessary to consider the effective use of vacant lots that have developed due to the demolition of Kyo-machiya (traditional houses) in Kyoto. These long, narrow lots are called Unagi-no-nedoko (“beds of eel”). Their spatial characteristics might make them unsuitable as green spaces because there is the possibility of creating a dark, small, exclusive, and dangerous atmosphere. Thus, we investigated the influence of the environment of an Unagi–no-nedoko-like green space on user awareness and behavior. The results found that the inner area of the green space was as quiet as an indoor room and was recognized as a “relaxing” environment, which caused users to stay longer. Moreover, users found the whole area “large” and “open.” These findings demonstrate that the spatial characteristics of Unagi-no-nedoko do not necessarily make them uncomfortable as green spaces, and it is possible to use such lots as green spaces in downtown Kyoto

Three-dimensional crack propagation behavior in hydrogen-related fracture of high-strength martensitic steel

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Topological melting of the metastable skyrmion lattice in the chiral magnet Co9_9Zn9_9Mn2_2

In a $\beta$-Mn-type chiral magnet Co$_9$Zn$_9$Mn$_2$, we demonstrate that the magnetic field-driven collapse of a room temperature metastable topological skyrmion lattice passes through a regime described by a partial topological charge inversion. Using Lorentz transmission electron microscopy, the magnetization distribution was observed directly as the magnetic field was swept antiparallel to the original skyrmion core magnetization, i.e. negative magnetic fields. Due to the topological stability of skyrmions, a direct transition of the metastable skyrmion lattice to the equilibrium helical state is avoided for increasingly negative fields. Instead, the metastable skyrmion lattice gradually transforms into giant magnetic bubbles separated by $2\pi$ domain walls. Eventually these large structures give way to form a near-homogeneously magnetized medium that unexpectedly hosts a low density of isolated skyrmions with inverted core magnetization, and thus a total topological charge of reduced size and opposite sign compared with the initial state. A similar phenomenon has been observed previously in systems hosting ordered lattices of magnetic bubbles stabilized by the dipolar interaction and called "topological melting". With support from numerical calculations, we argue that the observed regime of partial topological charge inversion has its origin in the topological protection of the starting metastable skyrmion state.Comment: 9 pages, 4 figure

キリスト教紙芝居における福音的観点からの考察(2) : クリスマス物語を中心に

本研究では、キリスト教の福音紙芝居を保育に取り入れる際の一つの指針として、クリスマス物語の作品を取り上げ、聖書に基づいた内容の分析と、子どもに語る際の聖書からのメッセージの視点を示すことを目的として研究を行った。その結果、クリスマス物語の聖書箇所である、マタイによる福音書、ルカによる福音書をベースにしつつ、登場人物や印象的な 場面に焦点をおく等の、各作品の特徴が表れていた。聖書の話には忠実でありながらも、豊かなファンタジーを使って述べられている作品や、子どもが主人公の気持ちに感情移入できるような話の構成も見られた。課題としては、特にキリスト教主義の園においては、クリスマスの意義を子どもに伝えるとともに、紙芝居が有効に用いられることが望ましいと思われる