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Public Debt and Redeemability －Approach from Viewpoint of Welfare Economics－
Get PDFWe will analyze public debt, which is said to be the fate of the Japan economy, from the perspective of welfare economics. In Japan, there is a conflict between the idea that the accumulation of public debt leads to fiscal collapse and the idea that public debt contributes to economic welfare. In this study, we define a temporary equilibrium path under the overlapping generations model and show that public debt has a threshold that separates the redeemable threshold from the financial collapse path according to the current balance. This means that although public debt accumulates and leads to financial collapse, it will converge endogenously if it is within the threshold. In addition, paths of temporary equilibrium with different budget deficit balances are compared based on the Pareto criterion. It is concluded that public debt contributes to economic composition if it is within the threshold, but if it exceeds the threshold, it will lead to financial collapse. Therefore, a single model can consistently explain conflicting public debt claims. This study in intertemporal economics also provides an answer to the open problem arising from Blanchardʼs (2019) method, which relies on comparative static analysis to address the equilibrium of public debt.論説departmental bulletin pape
Close cooperation between Semi1 and Semi2 proteins is essential for pronuclear positioning in Tetrahymena thermophila
Get PDFDuring sexual reproduction in the ciliate Tetrahymena thermophila, meiosis occurs in the germline micronucleus, resulting in the formation of four haploid micronuclei. Of these, only one is selected to evade autophagy, and subsequently migrates to the membrane junction with the partner cell for reciprocal pronuclear exchange. We previously demonstrated that the transmembrane protein Semi1 is essential for this nuclear migration. Semi1 is specifically expressed in mating cells and localizes to the periphery of the selected nucleus. Loss of Semi1 disrupts nuclear attachment to the junction, leading to infertility. However, the mechanism by which Semi1 positions the nucleus at the junction remains unclear. Here, we report that the Semi1-interacting protein, Semi2, is also necessary for proper nuclear positioning. Deletion of Semi2 results in the same nuclear mislocalization phenotype and infertility observed in Semi1 mutant cells. Semi2 colocalizes with Semi1, but in the absence of Semi1, Semi2 fails to exhibit perinuclear localization. The selected nucleus anchors to microtubules prior to migration, a process dependent on both Semi1 and Semi2. We propose a model in which Semi1 recruits Semi2 to the selected nucleus, facilitating the interaction between the nucleus and microtubules required for proper nuclear positioning at the membrane junction.journal articl
Development of Surface Finishing Technology for Fifth and Sixth Generation of Mobile Communication System (3)
Get PDF工学研究所プロジェクト研究departmental bulletin pape
An Examination of the Illustrative Characteristics in the Tōshisen Ehon 唐詩選画本 Changes in Illustrations in Revision Editions and Their Influence on Other Works
Get PDF江戸時代に多くの注釈書が出された『唐詩選』には『唐詩選画本』という絵入叢書がある。本作品は七編より構成されており、特に刊行時期が早い一編、続編に収録される画には唐詩画譜をはじめとする一連の中国の書物を参考にし、再構図したものが多くある。それでも本作品の画は数と質ともに絵入の『唐詩選』において比類がないため、後世に刊行された同種類の作品に多く模倣され、『唐詩選』の受容研究においても高い価値を持っている。
従来の研究では、本作品の成立経緯、画における中国古典の受容状況、一編、続編の再版本における変更などの問題について多角的に考察が加えられてきた。 そこで、本論文は先行研究では詳しく考察されていない一編、続編の再版本における画の改変に着目し、それらの改変の特徴や理由を『唐詩選画本』所収の挿画の全体的な特徴と結びつけて論じた。
また、明治時代に刊行された数種の絵入の『唐詩選』はどのように『唐詩選画本』の画を模倣したのかについても考察を加え、その受容の特徴を分析した。The Tōshisen Ehon is a series of illustrated volumes of the Tōshisen 唐詩選（Selected Poems of the Tang Dynasty）, for which many annotated editions were published during the Edo period. This series consists of seven volumes, with the first and second volumes, which were published earlier, containing many illustrations that were restructured based on a range of Chinese works, including the Tōshiga-fu 唐詩画譜（Illustrated Poems of the Tang Dynasty）. Despite this,
the illustrations in these volumes of the Tōshisen Ehon were unparalleled in both quantity and quality within illustrated versions of the Tōshisen, and as a result, they were widely imitated in similar works published in later periods. These illustrations hold significant value in the study of the reception of the Tōshisen.
Previous research has examined various aspects, including the compilation process of these works, the reception of Chinese classics in the illustrations, and the modifications made in the first and second volumes of the revision editions.
This paper, however, focuses on the changes made to the illustrations in the first and second volumes of the revision editions of the Tōshisen Ehon, which have not been thoroughly examined in prior research. It discusses the characteristics of and reasons for these changes, linking them to the overall characteristics of the illustrations included in the Tōshisen Ehon.
Additionally, the paper explores how several illustrated editions of the Tōshisen published during the Meiji period imitated the illustrations from the Tōshisen Ehon and analyzes the distinctive features of these imitations.論文departmental bulletin pape
