Multi-Hamiltonian Structures on Beauville's Integrable System and Its Variant

We study Beauville's completely integrable system and its variant from a viewpoint of multi-Hamiltonian structures. We also relate our result to the previously known Poisson structures on the Mumford system and the even Mumford system.Comment: This is a contribution to the Vadim Kuznetsov Memorial Issue on Integrable Systems and Related Topics, published in SIGMA (Symmetry, Integrability and Geometry: Methods and Applications) at http://www.emis.de/journals/SIGMA

Gender Differences in Aspirations for Career and Marriage among Japanese Young Adults: Evidence from a Large National University in Japan

This study examined the ways in which Japanese young people think about their future careers, focusing on their occupational aspirations and attitudes toward marriage. The data were collected using a questionnaire that consisted of short essay items providing information derived from undergraduate students (510 men; 433 women) at a large national university in Japan. The results indicated that men concern themselves more with work life, whereas women concern themselves more with marriage life. Although one’s college days are important times for developing one’s future career, many lacked clear initial occupational aspirations. The results especially indicated a need to educate both male and female students on ways of supporting female students in their decisions on how to participate in the workforce

Factors leading to differences in water availability and photosynthetic activity of High Arctic lichens

第6回極域科学シンポジウム[OB] 極域生物圏11月16日（月）　国立極地研究所１階交流アトリウ

Photosynthetic responses to water and light of five Arctic lichens and their photobionts

第3回極域科学シンポジウム/第34回極域生物シンポジウム 11月27日（火） 国立極地研究所 ３階ラウン

Integrable systems in the realm of algebraic geometry -- after Mumford, Beauville and Vanhaecke

Beauville [A. Beauville, Jacobiennes des courbes spectrales et systèmes hamiltoniens complètement intégrables, Acta. Math. 164 (1990) 211-235] introduced an integrable Hamiltonian system whose general level set is isomorphic to the complement of the theta divisor in the Jacobian of the spectral curve. This can be regarded as a generalization of the Mumford system [D. Mumford, Tata Lectures on Theta II, Birkhäuser, 1984]. In this article, we construct a variant of Beauville's system whose general level set is isomorphic to the complement of the intersection of the translations of the theta divisor in the Jacobian. A suitable subsystem of our system can be regarded as a generalization of the even Mumford system introduced by Vanhaecke [P. Vanhaecke, Linearising two-dimensional integrable systems and the construction of action-angle variables

チュウゴク ノ キッショウ モチーフ ニ ツイテ

卒業論文(Thesis