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Study on Applicability to Spinel-Based Oxide on Alloy Interconnect for Solid Oxide Fuel Cells
No full textSolid oxide fuel cells (SOFC) are applied to co-generation systems for household use that produce electricity and heat with the high efficiency. Research and development on SOFC are now coming to the reduction of the operating temperature from 1273 to around 973 K. Therefore, metal alloys can be applied to interconnect for SOFC. However, oxide scale formation occurs on the surface under the operating atmosphere and causes decreasing the electrical conductivity. Some spinel-based oxides are investigated as a protective layer preventing the alloy surface from further oxidation. In order to clarify the optimum synthesis conditions of the spinel-based oxides, (ZnxFe1-x)Mn2O4 (ZFMO, 0.0≦x≦1.0) were prepared by solid-state reactions, and then the influence of the conditions on the XRD patterns were discussed. In addition, the electrical conductivities of the samples were measured by the four-probe method under oxidative condition from 673 to 1273 K. Samples of ZFMO (x = 0.6～1.0) fired at 1373K for 10 hours were confirmed to be a single phase of spinel-structure and high thermal durability. However, concerning on ZFMO (x = 0.0～0.5) fired under the same condition, no traces of the spinel-structure were detected. Electrical conductivities of ZFMO (x = 0.2, 0.4, 0.7, 0.9) were 1.75, 1.92, 0.19, 0.12 S・cm-1 at 1073 K, respectively
Enders, Armelle (traduҫão por Marisa Motta), A Nova História do Brasil, Gryphus Editora, 2012.
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Experiments on Transformation of JAPAN/MARC21 Records to DC Format Records - Case of DC-NDL(RDF) sample01 Record -
No full text本論文は,JAPAN/MARC21の書誌レコードをDC形式へ変換することについて述べる。MARC21用RDF DC形式への変換XSLスタイルシートがLCから提供されている。JAPAN/MARC21の書誌レコードにそれを適用した。その結果,その変換は不十分であると結論づけた。そこで,JAPAN/MARC21の書誌レコードをDC-NDL(RDF)形式へ変換するXSLスタイルシートを作成することとした。本稿では,第一歩として,DC-NDL(RDF)形式のサンプルレコードsample01と同一のレコードを生成する変換XSLスタイルシートを作成する
Mechanisms underlying the generation of miniature eye movement and its contribution on visual functions
No full textFixation, holding one\u27s eyes on an object, plays a key role in the perception of visual scenes. The eyes are continuously fluctuating, even during fixation where the eyes seem still. The fluctuations are called miniature eye movements and consist of microsaccades, drifts, and tremors. It has been revealed that these miniature eye movements aid our vision; they improve the visibility of high spatial frequency components, and prevent retinal adaptation during fixation. Although the functional roles of the miniature eye movements have gradually been uncovered, their generation mechanism and details of their contribution on the visual functions remain a mystery. Here, I focus on the microsaccade while reviewing the related neuronal circuit and generation mechanisms from the viewpoint of neurophysiology and computational neuroscience. Also, I report the latest evidence for the contribution of the miniature eye movement on visual signal processing
