Scientific Commons: Y. Koyama

The spectroscopically confirmed huge cosmic structure at z=0.55 (2009)

Tanaka, M., Finoguenov, A., Kodama, T., Koyama, Y., Maughan, B., Nakata, F.

We report on the spectroscopic confirmation of a huge cosmic structure around the CL0016 cluster at z=0.55. We made wide-field imaging observations of the surrounding regions of the cluster and...

The spectroscopically confirmed huge cosmic structure at z = 0.55 (2009)

Tanaka, M., Finoguenov, A., Kodama, T., Koyama, Y., Maughan, B., Nakata, F.

k (2009)

Publisher Taylor, K. Borkowski, J. Quick, G. Nicolson, I. Shmeld, Y. Koyama, ...

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Optically induced magnetization and ultrafast spin relaxation in manganese oxide (2008)

Kohmoto, Toshiro, Sakaguchi, H., Takahashi, M., Kakita, K., Koyama, Y., Moriyasu, T.

Microstructure and kinematics of H2O masers in the massive star forming region IRAS 06061+2151 (2008)

Motogi, K., Watanabe, Y., Sorai, K., Habe, A., Honma, M., Imai, H., ...

We have made multi-epoch VLBI observations of H2O maser emission in the massive star forming region IRAS 06061+2151 with the Japanese VLBI network (JVN) from 2005 May to 2007 October. The detected...

Strange filamentary structures ("fireballs") around a merger galaxy in the Coma cluster of galaxies (2008)

Yoshida, M., Yagi, M., Komiyama, Y., Furusawa, H., Kashikawa, N., Koyama, Y., ...

We found an unusual complex of narrow blue filaments, bright blue knots, and H-alpha emitting filaments and clouds, which morphologically resembled a complex of ``fireballs,'' extending up to 80 kpc...

Optically induced spin echoes in rubidium atoms: On- and off-resonant manipulations of spins (2008)

Moriyasu, T, Koyama, Y, Fukuda, Y, Kohmoto, T

Recent Progress in the VLBI2010 Development (2008)

Behrend, J., Boehm, J., Charlot, P., Clark, T., Corey, B., Gipson, J., ...

From October 2003 to September 2005, the International VLBI Service for Geodesy and Astrometry (IVS) examined current and future requirements for geodetic VLBI, including all components from antennas...

Recent Progress in the VLBI2010 Development (2008)

Behrend, J., Boehm, J., Charlot, P., Clark, T., Corey, B., Gipson, J., ...

From October 2003 to September 2005, the International VLBI Service for Geodesy and Astrometry (IVS) examined current and future requirements for geodetic VLBI, including all components from antennas...

Recent Progress in the VLBI2010 Development (2008)

Behrend, J., Boehm, J., Charlot, P., Clark, T., Corey, B., Gipson, J., ...

From October 2003 to September 2005, the International VLBI Service for Geodesy and Astrometry (IVS) examined current and future requirements for geodetic VLBI, including all components from antennas...

Recent Progress in the VLBI2010 Development (2008)

Behrend, J., Boehm, J., Charlot, P., Clark, T., Corey, B., Gipson, J., ...

From October 2003 to September 2005, the International VLBI Service for Geodesy and Astrometry (IVS) examined current and future requirements for geodetic VLBI, including all components from antennas...

The 2006 Radio Outburst of a Microquasar Cyg X-3: Observation and Data (2007)

Tsuboi, M., Tosaki, T., Kuno, N., Nakanishi, K., Sawada, T., Umemoto, T., ...

We present the results of the multi-frequency observations of radio outburst of the microquasar Cyg X-3 in February and March 2006 with the Nobeyama 45-m telescope, the Nobeyama Millimeter Array, and...

The pc-scale structure and evolution of BL Lac PKS 0003-066 (2006)

Horiuchi, S., Tingay, S. J., West, C. J., Tzioumis, A. K., Phillips, C. J., Lovell, J. E. J., ...

We present the results of global VLBI observations of the BL Lac object PKS 0003-066 at 2.3 and 8.6 GHz, over a 10 year period using data from new and archived VLBA, geodetic VLBI, and global VLBI...

First-principles calculations of migration energy of lithium ions in halides and chalcogenides (2006)

Kishida, I, Koyama, Y, Kuwabara, A, Yamamoto, T, Oba, F, Tanaka, I

First-principles multi-electron calculations for L-2,L-3 ELNES/XANES of 3d transition metal monoxides (2006)

Ikeno, H, Mizoguchi, T, Koyama, Y, Kumagai, Y, Tanaka, I

First-principles multielectron calculations of Ni L-2,L-3 NEXAFS and ELNES for LiNiO2 and related compounds (2005)

Ikeno, H, Tanaka, I, Koyama, Y, Mizoguchi, T, Ogasawara, K

Morphological Variation in a Toroid Generated from a Single Polymer Chain (2005)

Takenaka, Y., Yoshikawa, Y., Koyama, Y., Kanbe, T., Yoshikawa, K.

A single semiflexible polymer chain folds into a toroidal object under poor solvent conditions. In this study, we examined the morphological change in such a toroidal state as a function of the width...

Electronic structure of lithium nickel oxides by electron energy loss spectroscopy (2005)

Koyama, Y, Mizoguchi, T, Ikeno, H, Tanaka, I

First-principles multielectron calculations of Ni L-2,L-3 NEXAFS and ELNES for LiNiO2 and related compounds (2005)

Ikeno, H, Tanaka, I, Koyama, Y, Mizoguchi, T, Ogasawara, K

Tissue regeneration using macrophage migration inhibitory factor-impregnated gelatin microbeads in cutaneous wounds (2005)

Zhao, YN, Shimizu, T, Nishihira, J, Koyama, Y, Kushibiki, T, Honda, A, ...

Search for Gravitational Wave Trains with the Spacecraft ULYSSES (2004)

Bertotti, B., Ambrosini, R., Armstrong, J., Asmar, S., Comoretto, G., Giampieri, G., ...

We report on the search for periodic gravitational wave in the mHz band conducted with the spacecraft ULYSSES.

Search for Gravitational Wave Trains with the Spacecraft Ulysses (2004)

Bertotti, B., Ambrosini, R., Armstrong, J., Asmar, S., Comoretto, G., Giampieri, G., ...

We report on the search for periodic gravitational wave in the mHz band conducted with the spacecraft ULYSSES. Gravitational wave signals generally provide information about the distance of the...

Search for Gravitational Wave Trains with the Spacecraft ULYSSES (2004)

Bertotti, B., Ambrosini, R., Armstrong, J. W., Asmar, S., Comoretto, G., Giampieri, G., ...

A proposal to extend the ICRF to multiple frequencies (2004)

REsch, G. M., Jacobs, D., Jones, D., Lanyi, G., Lowe, S., Naudet, C., ...

A proposal to extend the ICRF to higher frequencies (2004)

Resch, G. M., Jacobs, C., Jones, D., Lanyi, G., Lowe, S., Naudet, C., ...

Radar observations and physical model of asteroid 6489 Golevka (2004)

Hudson, R., Ostro, S., Jurgens, R., Rosema, K., Giorgini, J., Winkler, R., ...

We report 8510-MHz (3,5-cm) radar observations of the Earth crossing asteroid (ECA) 6489 Golevka (1991 JX) obtained between June 3 and June 15, 1995, at Goldstone, the Very Large Array and the...

Systematic research on insertion materials based on superlattice models in a phase triangle of LiCoO2-LiNiO2-LiMnO2. I. First-principles calculation on electronic and crystal structures, phase stability and new LiNi1/2Mn1/2O2 material (2004)

Koyama, Y, Makimura, Y, Tanaka, I, Adachi, H, Ohzuku, T

Solid-state chemistry, and electrochemistry of LiCo1/3Ni1/3Mn1/3O2 for advanced lithium-ion batteries - I. First-principles calculation on the crystal and electronic structures (2004)

Koyama, Y, Yabuuchi, N, Tanaka, I, Adachi, H, Ohzuku, T

Accurate Astrometry of 22 Southern Hemisphere Radio Sources (2004)

Fey, AL, Ojha, R, Jauncey, DL, Johnston, KJ, Reynolds, JE, Lovell, JEJ, ...

Opposite effects of depressant and convulsant barbiturate stereoisomers on acetylcholine release from the rat hippocampus in vivo (2004)

Inagawa, G., Sato, K., Kikuchi, T., Nishihama, M., Shioda, M., Koyama, Y., ...

Background. It has been shown that the R(-) isomer of 1-methyl-5-phenyl-5-propyl barbituric acid (MPPB) induces loss of the righting reflex (LRR), while S(+)-MPPB causes pure excitatory effects,...

Chronic ethanol consumption does not affect action of propofol on rat hippocampal acetylcholine release in vivo (2004)

Inagawa, G., Sato, K., Kikuchi, T., Nishihama, M., Shioda, M., Koyama, Y., ...

Background. The aim of this study was to examine ethanol-consumption-related changes in the effects of propofol on rat hippocampal acetylcholine (ACh) release. Methods. Male Sprague-Dawley rats...

Opposite effects of depressant and convulsant barbiturate stereoisomers on acetylcholine release from the rat hippocampus in vivo (2004)

Inagawa, G., Sato, K., Kikuchi, T., Nishihama, M., Shioda, M., Koyama, Y., ...

Background. It has been shown that the R(–) isomer of 1‐methyl‐5‐phenyl‐5‐propyl barbituric acid (MPPB) induces loss of the righting reflex (LRR), while S(+)‐MPPB...

Chronic ethanol consumption does not affect action of propofol on rat hippocampal acetylcholine release in vivo (2004)

Inagawa, G., Sato, K., Kikuchi, T., Nishihama, M., Shioda, M., Koyama, Y., ...

Background. The aim of this study was to examine ethanol-consumption-related changes in the effects of propofol on rat hippocampal acetylcholine (ACh) release. Methods. Male Sprague–Dawley rats...

Opposite effects of depressant and convulsant barbiturate stereoisomers on acetylcholine release from the rat hippocampus in vivo (2004)

Inagawa, G., Sato, K., Kikuchi, T., Nishihama, M., Shioda, M., Koyama, Y., ...

Background. It has been shown that the R(-) isomer of 1-methyl-5-phenyl-5-propyl barbituric acid (MPPB) induces loss of the righting reflex (LRR), while S(+)-MPPB causes pure excitatory effects,...

Chronic ethanol consumption does not affect action of propofol on rat hippocampal acetylcholine release in vivo (2004)

Inagawa, G., Sato, K., Kikuchi, T., Nishihama, M., Shioda, M., Koyama, Y., ...

Background. The aim of this study was to examine ethanol-consumption-related changes in the effects of propofol on rat hippocampal acetylcholine (ACh) release. Methods. Male Sprague-Dawley rats...

The role of the 1(1)B(u)(-) state in carotenoid-to-bacteriochlorophyll singlet-energy transfer in the LH2 antenna complexes from Rhodobacter sphaeroides G1C, Rhodobacter sphaeroides 2.4.1, Rhodospirillum molischianum and Rhodopseudomonas acidophila (2004)

Rondonuwu, FS, Yokoyama, K, Fujii, R, Koyama, Y, Cogdell, RJ, Watanabe, Y

Optically driven transport into a living cell (2003)

Kubo, K, Ichikawa, M, Yoshikawa, K, Koyama, Y, Niidome, T, Yamaoka, T, ...

Electronic structures and electrode potentials of layered lithium insertion electrodes by the first principles calculation (2003)

Koyama, Y, Tanaka, I, Adachi, H

First principles calculations of formation energies and electronic structures of defects in oxygen-deficient LiMn2O4 (2003)

Koyama, Y, Tanaka, I, Adachi, H, Uchimoto, Y, Wakihara, M

First principles calculations of the formation energy of Cr/Al vacancies in spinel-type MgCr2O4 and MgAl2O4 (2003)

Moriwake, H, Tanaka, I, Oba, F, Koyama, Y, Adachi, H

Crystal and electronic structures of superstructural Li1-x[Co1/3Ni1/3Mn1/3]O-2 (0 (2003)

Koyama, Y, Tanaka, I, Adachi, H, Makimura, Y, Ohzuku, T

Witnessing the Hierarchical Assembly of the Brightest Cluster Galaxy in a Cluster at z=1.26 (2002)

Yamada, T., Koyama, Y., Nakata, F., Kajisawa, M., Tanaka, I., Kodama, T., ...

We have obtained a new high-resolution K'-band image of the central region of the rich X-ray cluster RX J0848.9+4452 at z=1.26. We found that the brightest cluster galaxy (BCG) in the cluster is...

Formation energy of Cr/Al vacancies in spinel MgCr2O4 and MgAl2O4 by first-principles calculations (2002)

Moriwake, H, Tanaka, I, Oba, F, Koyama, Y, Adachi, H

Formation of isomorphic Ir3+ and Ir4+ octamers and spin dimerization in the spinel CuIr2S4 (2002)

Paolo G. Radaelli, Y. Horibe, Matthias J. Gutmann, Hiroki Ishibashi, C. H. Chen, Richard M. Ibberson, ...

Formation of isomorphic Ir3+ and Ir4+ octamers and spin dimerization in the spinel CuIr2S4 (2002)

Radaelli, P G, Horibe, Y, Gutmann, M J, Ishibashi, H, Chen, C H, Ibberson, R M, ...

Evaluation of migration energy of lithium ions in chalcogenides and halides by first principles calculation (2002)

Koyama, Y, Yamada, Y, Tanaka, I, Nishitani, SR, Adachi, H, Murayama, M, ...

Formation energy of Cr/Al vacancies in spinel MgCr2O4 and MgAl2O4 by first-principles calculations (2002)

Moriwake, H, Tanaka, I, Oba, F, Koyama, Y, Adachi, H

Theoretical solution energy of alkaline earth ions in lanthanum chromites (2002)

Moriwake, H, Tanaka, I, Tatsumi, K, Koyama, Y, Adachi, H, Yakabe, H, ...

Relativistic cluster calculation of ligand-field multiplet effects on cation L-2,L-3 x-ray-absorption edges of SrTiO3, NiO, and CaF2 (2001)

Ogasawara, K, Iwata, T, Koyama, Y, Ishii, T, Tanaka, I, Adachi, H

Relativistic cluster calculation of ligand-field multiplet effects on cation L-2,L-3 x-ray-absorption edges of SrTiO3, NiO, and CaF2 (2001)

Ogasawara, K, Iwata, T, Koyama, Y, Ishii, T, Tanaka, I, Adachi, H

Postsynaptic 5-hydroxytryptamine1A receptor activation increases in vivo dopamine release in rat prefrontal cortex (2000)

M Sakaue, P Somboonthum, B Nishihara, Y Koyama, H Hashimoto, A Baba, ...

Radar Observations and Physical Modeling of Asteroid 6489 Golevka (2000)

Hudson, R.S., Ostro, S.J., Jurgens, R.F., Rosema, K.D., Giorgini, J.D., Winkler, R., ...

New fluoride cathodes for rechargeable lithium batteries (2000)

Koyama, Y, Tanaka, I, Adachi, H

Chemical bondings around intercalated Cr and Fe atoms in TiS2 (2000)

Kim, YS, Li, J, Tanaka, I, Koyama, Y, Adachi, H

Radar Observations and Physical Modeling of Asteroid 6489 Golevka (2000)

R. S. Hudson, S. J. Ostro, R. F. Jurgens, K. D. Rosema, J. D. Giorgini, R. Winkler, ...

44> Author AC voice fax JPL E-mail mailstop ----------------------------------------------------------------------------- Hudson 509 335-0922 335-3818 hudson@eecs.wsu.edu Ostro 818 354-3173...

Risk factors for breast cancer in Japan, with special attention to anthropometric measurements and reproductive history (1999)

Tung, HT, Tsukuma, H, Tanaka, H, Kinoshita, N, Koyama, Y, Ajiki, W, ...

Family environment, hobbies and habits as psychosocial predictors of survival for surgically treated patients with breast cancer (1998)

Tominaga, K, Andow, J, Koyama, Y, Numao, S, Kurokawa, E, Ojima, M, ...

Relation of family history of cancer and environmental factors to the risk of colorectal cancer: a case-control study (1995)

Kotake, K, Koyama, Y, Nasu, J, Fukutomi, T, Yamaguchi, N

Staggered Polarization of Vertex Models with $U_q(\widehat{sl}(n))$-Symmetry (1993)

Koyama, Y.

In this paper we give an explicit formula for level 1 vertex operators related to $U_q(\widehat{sl}(n))$ as operators on the Fock spaces. We derive also their commutation relations. As an...

A follow-up study of resected stomach cancer patients with special emphasis on the incidence of second primary cancers (1993)

Tominaga, K, Koyama, Y, Sasagawa, M, Yamaguchi, E, Yoshinari, M, Nagai, M

STRUCTURAL PHASE TRANSFORMATIONS IN THE INDIUM-RICH SOLID SOLUTIONS (1982)

Koyama, Y., Nittono, O.