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2,434 results on '"Hiramatsu, K."'

1. {}

Author

Tan, X.-E., Neoh, H.-m., Looi, M.-L., Tan, T. L., Hussin, S., Cui, L., Hiramatsu, K., and Jamal, R.

Subjects
Microbiology, QR1-502
Published
2016

5. Cosmic ray tests of a GEM-based TPC prototype operated in Ar-CF4-isobutane gas mixtures: II

Author

Kobayashi, M., Yonamine, R., Tomioka, T., Aoza, A., Bito, H., Fujii, K., Higashi, T., Hiramatsu, K., Ikematsu, K., Ishikawa, A., Kato, Y., Kuroiwa, H., Matsuda, T., Nitoh, O., Ohta, H., Sakai, K., Settles, R. D., Sugiyama, A., Tsuji, H., Watanabe, T., Yamaoka, H., and Yazu, T.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract

The spatial resolution along the pad-row direction was measured with a GEM-based TPC prototype for the future linear collider experiment in order to understand its performance for tracks with finite projected angles with respect to the pad-row normal. The degradation of the resolution due to the angular pad effect was confirmed to be consistent with the prediction of a simple calculation taking into account the cluster-size distribution and the avalanche fluctuation., Comment: 11 pages, 4 figures

Published
2014
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6. Cosmic ray tests of a GEM-based TPC prototype operated in Ar-CF4-isobutane gas mixtures

Author

Kobayashi, M., Yonamine, R., Tomioka, T., Aoza, A., Bito, H., Fujii, K., Higashi, T., Hiramatsu, K., Ikematsu, K., Ishikawa, A., Kato, Y., Kuroiwa, H., Matsuda, T., Nitoh, O., Ohta, H., Sakai, K., Settles, R. D., Sugiyama, A., Tsuji, H., Watanabe, T., Yamaoka, H., and Yazu, T.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract

Argon with an admixture of CF4 is expected to be a good candidate for the gas mixture to be used for a time projection chamber (TPC) in the future linear collider experiment because of its small transverse diffusion of drift electrons especially under a strong magnetic field. In order to confirm the superiority of this gas mixture over conventional TPC gases we carried out cosmic ray tests using a GEM-based TPC operated mostly in Ar-CF4-isobutane mixtures under 0 - 1 T axial magnetic fields. The measured gas properties such as gas gain and transverse diffusion constant as well as the observed spatial resolution are presented., Comment: A supplemental material (Addendum to be published in Nucl. Instrum. Methods Phys. Res. A) was added at the end of the manuscript to help readers understand the formulas in Appendix B. No changes in the conclusion. 24 pages, including 21 figures

Published
2010
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7. Cosmic Ray Tests of the Prototype TPC for the ILC Experiment

Author

Ackermann, K., Arai, S., Arogancia, D. C., Bacala, A. M., Ball, M., Behnke, T., Bito, H., Eckardt, V., Fujii, K., Fusayasu, T., Ghodbane, N., Gooc Jr., H. C., Kijima, T., Hamann, M., Habu, M., Heuer, R. -D., Hiramatsu, K., Ikematsu, K., Kaukher, A., Kuroiwa, H., Janssen, M. E., Kato, Y., Kobayashi, M., Kuhl, T., Lux, T., Matsuda, T., Matsushita, S., Miyazaki, A., Nakamura, K., Nitoh, O., Ohta, H., Reserva, R. L., Sakai, K., Sakamoto, N., Sanuki, T., Settles, R., Sugiyama, A., Takahashi, T., Tomioka, T., Tsuji, H., Watanabe, T., Wienemann, P., Wurth, R., Yamaguchi, H., Yamaguchi, M., Yamaguchi, A., Yamamura, T., Yamaoka, H., Yazu, T., and Yonamine, R.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract

A time projection chamber (TPC) is a strong candidate for the central tracker of the international linear collider (ILC) experiment and we have been conducting a series of cosmic ray experiments under a magnetic field up to 4 T, using a small prototype TPC with a replaceable readout device: multi-wire proportional chamber (MWPC) or gas electron multiplier (GEM). We first confirmed that the MWPC readout could not be a fall-back option of the ILC-TPC under a strong axial magnetic field of 4 T since its spatial resolution suffered severely from the so called E x B effect in the vicinity of the wire planes. The GEM readout, on the other hand, was found to be virtually free from the E x B effect as had been expected and gave the resolution determined by the transverse diffusion of the drift electrons (diffusion limited). Furthermore, GEMs allow a wider choice of gas mixtures than MWPCs. Among the gases we tried so far a mixture of Ar-CF4-isobutane, in which MWPCs could be prone to discharges, seems promising as the operating gas of the ILC-TPC because of its small diffusion constant especially under a strong magnetic field. We report the measured drift properties of this mixture including the diffusion constant as a function of the electric field and compare them with the predictions of Magboltz. Also presented is the spatial resolution of a GEM-based ILC-TPC estimated from the measurement with the prototype., Comment: 4 pages, 8 figures. Preprint submitted to TIPP09 Proceedings

Published
2009
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8. A GEM TPC End-Panel Pre-Prototype

Author

Ishikawa, A., Aoza, A., Higashi, T., Sugiyama, A., Tsuji, H., Kato, Y., Hiramatsu, K., Yazu, T., Watanabe, T., Nitoh, O., Ohta, H., Sakai, K., Bito, H., Fujii, K., Kobayashi, M., Kuroiwa, H., Matsuda, T., Yonamine, R., Gao, Y., Li, Y., Li, J., Cao, L., Yang, Z., Bacala, A., Gooc, C. J., Reserva, R., and Arogoncia, D.

Subjects
Physics - Instrumentation and Detectors
Abstract

A GEM TPC end panel pre-prototype was constructed for a large LC-TPC prototype to test its basic design philosophy and some of its engineering details. Its interim test results are presented., Comment: 4 pages, 2 figures, Proceedings for LCWS07

Published
2007

10. Noise Performance Improvements of 2-Layer Transistor Pixel Stacked CMOS Image Sensor with Non-doped Pixel-FinFETs

Author

Kikuchi, Y., primary, Tomita, M., additional, Hayashi, T., additional, Chiba, H., additional, Ogita, T., additional, Okawa, T., additional, Nishida, K., additional, Sugimoto, M., additional, Yoneyama, D., additional, Umeki, T., additional, Oishi, H., additional, Miyake, S., additional, Hiramatsu, K., additional, Kumano, H., additional, Kawashima, H., additional, Yamada, N., additional, Tamura, M., additional, Ohnuma, H., additional, and Tatani, K., additional

Published
2023
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13. Addendum to “Cosmic ray tests of a GEM-based TPC prototype operated in Ar-CF4-isobutane gas mixtures” [Nucl. Instrum. Methods Phys. Res. A 641 (2011) 37–47]

Author

Kobayashi, M., primary, Yonamine, R., additional, Tomioka, T., additional, Aoza, A., additional, Bito, H., additional, Fujii, K., additional, Higashi, T., additional, Hiramatsu, K., additional, Ikematsu, K., additional, Ishikawa, A., additional, Kato, Y., additional, Kuroiwa, H., additional, Matsuda, T., additional, Nitoh, O., additional, Ohta, H., additional, Sakai, K., additional, Settles, R.D., additional, Sugiyama, A., additional, Tsuji, H., additional, Watanabe, T., additional, Yamaoka, H., additional, and Yazu, T., additional

Published
2023
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21. Clinical Use of Iodinated Contrast Media for the Visualization of Vessels, Organs and Organ Systems

Author

Skalpe, I. O., Thron, A., Maurer, H. J., Hagen, B., Weissleder, H., Thornton, M. J., Wilde, P., Rödl, W., Adam, A., Dawson, P., Bartram, C. I., Laermann, B., O’Brien, P., Taenzer, V., Rickards, D., Krestin, G. P., Heep, J. G., Papassotiriou, V., Tröger, J., Rankin, S. C., Meaney, J. F. M., Hashimoto, S., Hiramatsu, K., Dawson, Peter, editor, and Clauss, Wolfram, editor

Published
1999
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24. 3D Sequential Process Integration for CMOS Image Sensor

Author

Nakazawa, K., primary, Yamamoto, J., additional, Mori, S., additional, Okamoto, S., additional, Shimizu, A., additional, Baba, K., additional, Fujii, N., additional, Uehara, M., additional, Hiramatsu, K., additional, Kumano, H., additional, Matsumoto, A., additional, Zaitsu, K., additional, Ohnuma, H., additional, Tatani, K., additional, Hirano, T., additional, and Iwamoto, H., additional

Published
2021
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29. A study with a small prototype TPC for the international linear collider experiment

Author

Ackermann, K., Arai, S., Arogancia, D.C., Bacala, A.M., Ball, M., Behnke, T., Bito, H., Eckardt, V., Fujii, K., Fusayasu, T., Ghodbane, N., Gooc Jr., H.C, Kijima, T., Hamann, M., Habu, M., Heuer, R.-D., Hiramatsu, K., Ikematsu, K., Kaukher, A., Kuroiwa, H., Janssen, M.E., Kato, Y., Kobayashi, M., Kuhl, T., Lux, T., Matsuda, T., Matsushita, S., Miyazaki, A., Nakamura, K., Nitoh, O., Ohta, H., Pouthas, J., Reserva, R.L., Rosier, Ph., Sakai, K., Sakamoto, N., Sanuki, T., Settles, R., Sugiyama, A., Takahashi, T., Tomioka, T., Tsuji, H., Watanabe, T., Wienemann, P., Wurth, R., Yamaguchi, H., Yamaguchi, M., Yamaguchi, A., Yamamura, T., Yamaoka, H., Yazu, T., and Yonamine, R.

Published
2010
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30. Corrigendum to “Cosmic ray tests of a GEM-based TPC prototype operated in Ar-C[formula omitted]-isobutane gas mixtures” [Nucl. Instrum. Methods Phys. Res. A 641 (2011) 37–47]

Author

Kobayashi, M., Yonamine, R., Tomioka, T., Aoza, A., Bito, H., Fujii, K., Higashi, T., Hiramatsu, K., Ikematsu, K., Ishikawa, A., Kato, Y., Kuroiwa, H., Matsuda, T., Nitoh, O., Ohta, H., Sakai, K., Settles, R.D., Sugiyama, A., Tsuji, H., Watanabe, T., Yamaoka, H., and Yazu, T.

Published
2021
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31. Nationwide surveillance of bacterial respiratory pathogens conducted by the Japanese Society of Chemotherapy in 2007: general view of the pathogens’ antibacterial susceptibility

Author

Niki, Y., Matsumoto, T., Kohno, S., Aoki, N., Watanabe, A., Sato, J., Hattori, R., Terada, M., Koashi, N., Kozuki, T., Maruo, A., Morita, K., Ogasawara, K., Takahashi, Y., Watanabe, J., Sunakawa, K., Totsuka, K., Hanaki, H., Yagisawa, M., Takeuchi, K., Fujimura, S., Takeda, H., Ikeda, H., Sato, N., Niitsuma, K., Saito, M., Koshiba, S., Kaneko, M., Miki, M., Nakanowatari, S., Honda, Y., Chiba, J., Takahashi, H., Utagawa, M., Kondo, T., Kawana, A., Konosaki, H., Aoki, Y., Ueda, H., Sugiura, H., Ichioka, M., Goto, H., Kurai, D., Okazaki, M., Yoshida, K., Yoshida, T., Tanabe, Y., Kobayashi, S., Okada, M., Tsukada, H., Imai, Y., Honma, Y., Nishikawa, K., Yamamoto, T., Kawai, A., Kashiwabara, T., Takesue, Y., Wada, Y., Nakajima, K., Toda, H., Mitsuno, N., Sugimura, H., Yoshioka, S., Kurokawa, M., Munekawa, Y., Nakajima, H., Kubo, S., Ohta, Y., Mikasa, K., Maeda, K., Kasahara, K., Koizumi, A., Sano, R., Yagi, S., Takaya, M., Kurokawa, Y., Kusano, N., Mihara, E., Kuwabara, M., Fujiue, Y., Ishimaru, T., Matsubara, N., Kawasaki, Y., Tokuyasu, H., Masui, K., Negayama, K., Ueda, N., Ishimaru, M., Nakanishi, Y., Fujita, M., Honda, J., Kadota, J., Hiramatsu, K., Nagasawa, Z., Suga, M., Muranaka, H., Yanagihara, K., Fujita, J., and Tateyama, M.

Published
2009
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32. Microstructural analysis in the depth direction of a heteroepitaxial AlN thick film grown on a trench-patterned template by nanobeam X-ray diffraction.

Author

Shida, K., Takeuchi, S., Tohei, T., Miyake, H., Hiramatsu, K., Sumitani, K., Imai, Y., Kimura, S., and Sakai, A.

Subjects
THICK films, MICROSTRUCTURE, X-ray diffraction, CRYSTAL lattices, EPITAXY
Abstract

This work quantitatively assessed the three-dimensional distribution of crystal lattice distortions in an epitaxial AlN thick film grown on a trench-patterned template, using nanobeam X-ray diffraction. Position-dependent ω-2θ-φ mapping clearly demonstrated local tilting, spacing and twisting of lattice planes as well as fluctuations in these phenomena on a sub-micrometer scale comparable to the pitch of the trench-and-terrace patterning. Analysis of the crystal lattice distortion in the depth direction was performed using a newly developed method in which the X-ray nanobeam diffracted from the sample surface to specific depths can be selectively detected by employing a Pt wire profiler. This technique generated depth-resolved ω-2θ-φ maps confirming that fluctuations in lattice plane tilting and spacing greatly depend on the dislocation distribution and the history of the AlN epitaxial growth on the trench-patterned structure. It was also found that both fluctuations were reduced on approaching the AlN surface and, in particular, were sharply reduced at specific depths in the terrace regions. These sharp reductions are attributed to the formation of sacrificial zones with degraded crystal quality around the trenches and possibly lead to raising the crystal quality near the surface of the AlN film. [ABSTRACT FROM AUTHOR]

Published
2018
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35. Raman-activated directed evolution of Euglena gracilis with quantum-beam mutagenesis

Author

G. de Pablo , J., Lindley, M., Hiramatsu, K., Goda, K., Katsuya, Sato, and Yutaka, Ono

Abstract

Biomaterials derived from microalgae are promising as a source of biofuels, drugs, cosmetics, and foods. Among different microalgae, Euglena gracilis has attracted attention for biomaterials production due to its high productivity of paramylon, a potential drug for HIV and colon cancer. To enhance the productivity of paramylon in E.gracilis, directed evolution is a promising approach. In general, directed evolution consists of three key steps: mutagenesis, selection, and amplification. For applying it to the enhancement of the paramylon productivity of E.gracilis, mutagenesis and selection steps are challenging because altering nuclear genome of E.gracilis is difficult due to its polyploid nature and no biomarker such as fluorescent dyes is available for quantifying paramylon. In this study, we tackle these difficulties by combining quantum-beam irradiation for mutagenesis and high-throughput Raman-activated cell screening for label-free selection.

Published
2022

38. The first nationwide surveillance of bacterial respiratory pathogens conducted by the Japanese Society of Chemotherapy. Part 1: a general view of antibacterial susceptibility

Author

Niki, Y., Hanaki, H., Yagisawa, M., Kohno, S., Aoki, N., Watanabe, A., Sato, J., Hattori, R., Koashi, N., Kozuki, T., Maruo, A., Morita, K., Ogasawara, K., Takahashi, Y., Watanabe, J., Totsuka, K., Takeuchi, K., Takahashi, M., Takeda, H., Ikeda, H., Kaneda, H., Niitsuma, K., Saito, M., Koshiba, S., Kaneko, M., Itabashi, S., Miki, M., Nakanowatari, S., Honda, Y., Chiba, J., Takahashi, H., Utagawa, M., Kondo, T., Kawana, A., Konosaki, H., Aoki, Y., Chonabayashi, N., Ueda, H., Sugiura, H., Ichioka, M., Goto, H., Aoshima, M., Okazaki, M., Ozawa, T., Horiuchi, F., Yoshida, T., Tsukada, H., Kobayashi, S., Yoshikawa, H., Imai, Y., Honma, Y., Yoshida, K., Takaya, M., Kurokawa, Y., Kuwabara, M., Fujiue, Y., Ishimaru, T., Matsubara, N., Kawasaki, Y., Tokuyasu, H., Masui, K., Shimizu, E., Yoneda, K., Negayama, K., Ueda, N., Ishimaru, M., Nakanishi, Y., Fujita, M., Honda, J., Kadota, J., Hiramatsu, K., Nagasawa, Z., Suga, M., Muranaka, H., Yanagihara, K., Fujita, J., and Tateyama, M.

Published
2008
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40. Corrigendum to “Cosmic ray tests of a GEM-based TPC prototype operated in Ar-CF4-isobutane gas mixtures” [Nucl. Instrum. Methods Phys. Res. A 641 (2011) 37–47]

Author

Kobayashi, M., primary, Yonamine, R., additional, Tomioka, T., additional, Aoza, A., additional, Bito, H., additional, Fujii, K., additional, Higashi, T., additional, Hiramatsu, K., additional, Ikematsu, K., additional, Ishikawa, A., additional, Kato, Y., additional, Kuroiwa, H., additional, Matsuda, T., additional, Nitoh, O., additional, Ohta, H., additional, Sakai, K., additional, Settles, R.D., additional, Sugiyama, A., additional, Tsuji, H., additional, Watanabe, T., additional, Yamaoka, H., additional, and Yazu, T., additional

Published
2021
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46. Structural comparison of ten serotypes of staphylocoagulases in Staphylococcus aureus

Author

Watanabe, S., Ito, T., Takeuchi, F., Endo, M., Okuno, E., and Hiramatsu, K.

Subjects
Amino acid sequence -- Research, Staphylococcus aureus -- Comparative analysis, Staphylococcus aureus -- Genetic aspects, Genetic research, Biological sciences
Abstract

Staphylocoagulase detection is the hallmark of a Staphylococcus aureus infection. Ten different serotypes of staphylocoagulases have been reported to date. We determined the nucleotide sequences of seven staphylocoagulase genes (coa) and their surrounding regions to compare structures of all 10 staphylocoagulase serotypes, and we inferred their derivations. We found that all staphylocoagulases are comprised of six regions: signal sequence, D1 region, D2 region, central region, repeat region, and C-terminal sequence. Amino acids at both ends, 33 amino acids in the N terminal (the signal sequences and the seven N-terminal amino acids in the D1 region) and 5 amino acids in the C terminal, were exactly identical among the 10 serotypes. The central regions were conserved with identities between 80.6 and 94.1% and similarities between 82.8 and 94.6%. Repeat regions comprising tandem repeats of 27 amino acids with a 92% identity on average were polymorphic in the number of repeats. On the other hand, D1 regions other than the seven N-terminal amino acids and D2 regions were less homologous, with diverged identities from 41.5 to 84.5% and 47.0 to 88.9%, respectively, and similarities from 53.5 to 88.7% and 56.8 to 91.9%, respectively, although the predicted prothrombin-binding sites were conserved among them. In contrast, flanking regions of coa were highly homologous, with nucleotide identities of more than 97.1%. Phylogenetic relations among coa did not correlate with those among the flanking regions or housekeeping genes used for multilocus sequence typing. These data indicate that coa could be transmitted to S. aureus, while the less homologous regions in coa presumed to be responsible for different antigenicities might have evolved independently.

Published
2005

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