In this survey, we review fundamental properties of coalgebras and their representation theory. Following J.A. Green we present the block theory of coalgebras using indecomposable injectives comodules. Using the cohom and cotensor functors we state Takeuchi-Morita equivalence and use it to sketch the proof of existence of “basic” coalgebras, due to the author and S. Montgomery. This leads to a ...

Tomoyo KOYANAGI , Yoshinobu KUSUMOTO , Shori YAMAMOTO , Satoru OKUBO , Kazuhiko TAKEUCHI a 5 a Department of Ecosystem Studies, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo, Tokyo 113-8657, Japan E-mail addresses: [email protected] (TK), [email protected] (SO), [email protected] (KT) b Biodiversity Division...

This paper presents research on parent support of the development of new media skills and technological fluency. Parents’ roles in their children’s learning were identified based on interviews with eight middle school students and their parents. All eight students were highly experienced with technology activities. Seven distinct parental roles that supported learning were identified and define...

Despite years of study, it is still not clear how life emerged from inanimate matter and evolved into the complex forms that we observe today. One of the most recognized hypotheses for the origins of life, the RNA World hypothesis, assumes that life was sparked by prebiotic replicating RNA chains. In this paper, we address the problems caused by the interplay between hypothetical prebiotic RNA ...

Many nucleic acid binding proteins use short peptide sequences to provide specificity in recognizing their targets, which may be either a specific sequence or a conformation. Peptides containing alternating lysine have been shown to bind to poly(dG-d5meC) in the Z conformation, and stabilize the higher energy form [H. Takeuchi, N. Hanamura, H. Hayasaka and I. Harada (1991) FEBS Lett., 279, 253-...

Ozeki and Takeuchi [12, I] introduced the notion of Condition A and Condition B to construct two classes of inhomogeneous isoparametric hypersurfaces with four principal curvatures in spheres, which were later generalized by Ferus, Karcher and Münzner to many more examples via the Clifford representations; we will refer to these examples of Ozeki and Takeuchi and of Ferus, Karcher and Münzner c...

E. Blaufuss, G. Guillian , Y. Fukuda , S. Fukuda , M. Ishitsuka , Y. Itow , T. Kajita , J. Kameda , K. Kaneyuki , K. Kobayashi , Y. Kobayashi , Y. Koshio , M. Miura , S. Moriyama , M. Nakahata , S. Nakayama , Y. Obayashi , A. Okada , K. Okumura , N. Sakurai , M. Shiozawa , Y. Suzuki , H. Takeuchi , Y. Takeuchi , T. Toshito , Y. Totsuka , S. Yamada , M. Earl , A. Habig , E. Kearns , M.D. Messier...