A first measurement of the interaction cross section of the tau neutrino

The DONuT experiment collected data in 1997 and published first results in 2000 based on four observed $\nu_\tau$ charged-current (CC) interactions. The final analysis of the data collected in the experiment is presented in this paper, based on $3.6 \times 10^{17}$ protons on target using the 800 GeV Tevatron beam at Fermilab. The number of observed $\nu_\tau$ CC interactions is 9, from a total of 578 observed neutrino interactions. We calculated the energy-independent part of the tau-neutrino CC cross section ($\nu + \bar \nu$), relative to the well-known $\nu_e$ and $\nu_\mu$ cross sections. The ratio $\sigma(\nu_\tau)$/$\sigma(\nu_{e,\mu})$ was found to be $1.37\pm0.35\pm0.77$. The $\nu_\tau$ CC cross section was found to be $0.72 \pm 0.24\pm0.36 \times 10^{-38}$ cm$^{2}\rm{GeV}^{-1}$. Both results are in agreement the Standard Model.Comment: 37 pages, 15 figure

不確かさを考慮した多目的ロバスト最適設計

application/pdf日本航空宇宙学会誌. 2019, 67 (7), P.254-260journal articl

最適に回収されたスラリーを用いたタングステンCMPの評価

Chemical Mechanical Polishing (CMP) is essential for the manufacturing of recent high-performance electronic device. However, for the CMP process, huge amount of slurry is used, which is to be disposed after being used only once. From the viewpoint of reduction of environmental burdens, this study was made for exploring the possibility of recycling of slurry by focusing on the slurry used for Tungsten CMP. For that purpose, we recovered the slurry used for polishing and then tried to reuse it for polishing again. As a method for evaluation, we made comparisons of removal rates between new slurry and recovered slurry. The results shows that when recovering the slurry during CMP, it contained the water remained on the surface of the polishing pad after dressing, by which slurry was diluted and caused the reduction of removal rate of Tungsten film. However, it was found that when making polishing of Tungsten film using the slurry recovered without being diluted with water, the same level of removal rate as new slurry is obtained.textapplication/pdfdepartmental bulletin pape

Study of Time-Dependent CP Violation in B0→J/ψπ0 Decays

journal articl

コンテンツ収集戦略 / 事例報告：日の丸弁当から幕の内弁当へ

application/pdf平成19年2月8日-9日 / 第2回DRFワークショップ（早稲田大学） / 「機関リポジトリをデザインする－設計とコンテンツ」 / グループ討議テーマ3：コンテンツ収集戦略10conference objec

Carbon monoxide binding properties of domain-swapped dimeric myoglobin

Myoglobin (Mb) is a monomeric oxygen storage hemoprotein, and has been shown to form a domain-swapped dimer. In this study, monomeric and dimeric carbon monoxide (CO)-bound Mb (MbCO) exhibited similar absorption spectra. The CO stretching frequencies of MbCO were observed at 1,932 and 1,944 cm-1 for both monomeric and dimeric MbCO. The resonance Raman (RR) bands for the stretching between the heme iron and axial ligands were observed at the same frequencies for the monomer and dimer of deoxygenated Mb (deoxyMb) and MbCO, respectively (ν Fe-His, 220 cm-1; ν Fe-C, 507 cm-1), showing that the Fe-His bond strength of deoxyMb and the Fe-CO bond strength of MbCO did not change by the dimerization. Time-resolved RR measurements showed that the dynamics of the structural changes at the heme active site after CO photo-dissociation of MbCO was similar between monomeric and dimeric Mb [monomer, (5.2 ± 1.8) × 106 s-1; dimer, (6.2 ± 1.1) × 106 s-1 at room temperature]. These results show that the heme coordination structure, the protein environment around the bound CO, and the protein relaxation character are similar between monomeric and dimeric MbCO. Although the active site structure was similar between the monomer and dimer, the CO binding rate constant of dimeric Mb [(1.01 ± 0.03) × 106 M-1 s-1 at 20 °C] was about twice larger than that of the monomer [(0.52 ± 0.02) × 106 M-1 s-1 at 20 °C], presumably due to the expansion of the channel between the Xe3 cavity and the solvent by the dimerization.journal articl

Figure 7

<div><p>Genes Identified in the Screen as Being Required for Phagocytosis of <i>C. albicans</i> Were Superimposed onto a <i>Drosophila</i> Genomic Yeast Two-Hybrid Interaction Map</p> <p>Interactions are displayed, and several pathways are outlined. Dark-blue circles indicate genes identified as reduced phagocytosis of <i>C. albicans,</i> with light-blue circles indicating genes present in the two-hybrid map but not identified in the phagocytosis screen. Several functional groups are circled as indicated. This diagram represents only a portion of the complete two-hybrid map [<a href="http://www.plosbiology.org/article/info:doi/10.1371/journal.pbio.0040004#pbio-0040004-b035" target="_blank">35</a>], indicating that the genes identified in the phagocytosis screen affect a limited number of cellular processes.</p></div