158 research outputs found

    多色Activatable型プロテアーゼプローブ群の開発とがん蛍光・光音響イメージングへの応用

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    学位の種別: 課程博士審査委員会委員 : (主査)東京大学教授 渡邉 聡明, 東京大学特任准教授 吉川 健啓, 東京大学准教授 山本 希美子, 東京大学教授 瀬戸 泰之, 東京大学講師 吉田 昌史University of Tokyo(東京大学

    Population Characteristics and Progressive Disability in Neuofibromatosis Type 2

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    博士(医学)福島県立医科大

    CHOMSKY ノ カンガエ カラ CHOMSKY テキ カンガエ エ

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    Crossings as a side effect of dependency lengths

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    The syntactic structure of sentences exhibits a striking regularity: dependencies tend to not cross when drawn above the sentence. We investigate two competing explanations. The traditional hypothesis is that this trend arises from an independent principle of syntax that reduces crossings practically to zero. An alternative to this view is the hypothesis that crossings are a side effect of dependency lengths, i.e. sentences with shorter dependency lengths should tend to have fewer crossings. We are able to reject the traditional view in the majority of languages considered. The alternative hypothesis can lead to a more parsimonious theory of language.Comment: the discussion section has been expanded significantly; in press in Complexity (Wiley
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