HT2005-72132 LARGE-SCALE QUANTUM CHEMICAL MOLECULAR DYNAMICS SIMULATIONS ON THE FORMATION DYNAMICS OF HYDROGEN BY THE CHEMICAL REACTIONS OF WATER

ABSTRACT We have successfully simulated the chemical reaction dynamics of water molecules on various Si surfaces by using our new tight-binding quantum chemical molecular dynamics method. The formation dynamics of hydrogen molecules from water molecules on Si nano-particle was observed at 300 K. Especially, we found that the surface termination of Si nanoparticle strongly influences the chemical reactions of water molecules and the non-terminated Si surface is the active site for the hydrogen generation. Moreover, we suggest that nanospace of the SiO 2 /Si interface is more active site for the hydrogen generation. INTRODUCTION Hydrogen is expected to be next-generation energy resources because it does not emit any pollutant exhaust gas. Therefore, efficient technology to produce hydrogen from water is strongly demanded in order to realize the sustainable society. A lot of experimental works for the above purpose have been carried out previously. For example, metal oxide photocatalyst such as TiO 2 semiconductor is one of the candidates for the efficient generation of hydrogen from water and many researchers investigated the photocatalytic activity of metal oxide semiconductor

DECIGO pathfinder

DECIGO pathfinder (DPF) is a milestone satellite mission for DECIGO (DECi-hertz Interferometer Gravitational wave Observatory) which is a future space gravitational wave antenna. DECIGO is expected to provide us fruitful insights into the universe, in particular about dark energy, a formation mechanism of supermassive black holes, and the inflation of the universe. Since DECIGO will be an extremely large mission which will formed by three drag-free spacecraft with 1000m separation, it is significant to gain the technical feasibility of DECIGO before its planned launch in 2024. Thus, we are planning to launch two milestone missions: DPF and pre-DECIGO. The conceptual design and current status of the first milestone mission, DPF, are reviewed in this article

カガク リテラシー ノ シンコウ カツドウ ニ オケル キョウドウ ノ ヒツヨウセイ ニ ツイテ ノ ケントウ

本稿では、科学リテラシーの振興活動における、多様なアクターによる「協働」の必要性およびそのあり方についての検討を行う。第1節では、日本における科学リテラシー振興のための最も規模の大きな協働であった「科学技術の智」プロジェクトを振り返り、第2節以降は、今後の科学リテラシーの振興のためには、社会の様々なアクターによる協働がより一層必要であることを3つの関連する視点から論じる。まず第2節では、科学リテラシー振興活動の目指す社会と科学技術との間の関係性や、それを支える公共的な価値観について、協働で検討する必要性があることについて論じる。第3節では、個人やコミュニティ、社会といった様々な主体が相互補完的な形で科学リテラシー資源へのアクセスを支え合うような協働について論じる。第4節では、科学リテラシー振興活動の掲げる公共的な価値を実現するためには、仕組みや制度、システムを担う人たちと協働し、それらの整備と併せて科学リテラシーを考える必要があることについて論じる。そして最後に第5節では、前節までに述べた協働を推進するための具体的な活動の例について紹介する。In this paper, the authors argue for the necessity of multi-actor collaboration in discussing and promoting science literacy in our society. First we look back at the Science for All Japanese project − the largest national project for presenting a grand picture of science literacy for the Japanese society − and highlight its nature as a large-scale multi-actor collaboration. We then examine the reasons for which such multi-actor collaboration is even more important today in discussing and promoting science literacy from three inter-related perspectives that include: openly deliberating on public values of science communication; sharing science literacy resources in/among individuals, communities and societies; and exercising science literacy to realise desired science-society relations. The paper concludes with some examples of activities from our previous and current projects on science literacy for putting the ideas presented in this paper into practice

The status of DECIGO

DECIGO (DECi-hertz Interferometer Gravitational wave Observatory) is the planned Japanese space gravitational wave antenna, aiming to detect gravitational waves from astrophysically and cosmologically significant sources mainly between 0.1 Hz and 10 Hz and thus to open a new window for gravitational wave astronomy and for the universe. DECIGO will consists of three drag-free spacecraft arranged in an equilateral triangle with 1000 km arm lengths whose relative displacements are measured by a differential Fabry-Perot interferometer, and four units of triangular Fabry-Perot interferometers are arranged on heliocentric orbit around the sun. DECIGO is vary ambitious mission, we plan to launch DECIGO in era of 2030s after precursor satellite mission, B-DECIGO. B-DECIGO is essentially smaller version of DECIGO: B-DECIGO consists of three spacecraft arranged in an triangle with 100 km arm lengths orbiting 2000 km above the surface of the earth. It is hoped that the launch date will be late 2020s for the present

Metatarsals of a large caenagnathid cf. Anzu wyliei (Theropoda: Oviraptorosauria) from the Hell Creek Formation in South Dakota, U.S.A.

Isolated metatarsals III and IV of a caenagnathid theropod likely referable to Anzu wyliei are described from a locality of the Hell Creek Formation in northwestern South Dakota of the U.S.A. These bones are missing from the holotype and only partial shafts have been described for a specimen referable to this species. Accordingly, the present description adds further anatomical information on this already well-known species of Caenagnathidae. The present finding also demonstrates the significance of isolated or fragmentary specimens found in multitaxic bone beds.The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author