Continuous metal-insulator transition of the antiferromagnetic perovskite NaOsO3 (2009)
Shi, Y. G., Guo, Y. F., Yu, S., Arai, M., Belik, A. A., Sato, A., ...
Newly synthesized perovskite NaOsO3 shows Curie-Weiss metallic nature at high temperature and suddenly goes into an antiferromagnetically insulating state at 410 K on cooling. Electronic specific...
PDP47 Field Trial of Signaling Interworking of Multi-carrier ASON/GMPLS Network Domains (2008)
A. Nagata, S. Seno, D. Ishii, S. Okamoto, N. Arai, H. Otsuki
Abstract: A seamless end-to-end call set up over multi-carrier ASON and GMPLS network domains was successfully achieved. Interworking of two ASON network domains and five GMPLS network domains was...
Charge transfer in heterostructures of strongly correlated materials (2008)
Gonzalez, I., Okamoto, S., Yunoki, S., Moreo, A., Dagotto, E.
In this manuscript, recent theoretical investigations by the authors in the area of oxide multilayers are briefly reviewed. The calculations were carried out using model Hamiltonians and a variety of...
Magnetization behavior of nanomagnets for patterned media application (2008)
Okamoto, S., Kikuchi, N., Kato, T., Kitakami, O., Mitsuzuka, K., Shimatsu, T., ...
Bit patterned media (BPM) which utilize each magnetic nanostructured dot as one recorded bit has attracted much interest as a promising candidate for future high-density magnetic recording. In this...
NaV2O4: a Quasi-1D Metallic Antiferromagnet with Half-Metallic Chains (2007)
Yamaura, K., Arai, M., Sato, A., Karki, A. B., Young, D. P., Movshovich, R., ...
NaV2O4 crystals were grown under high pressure using a NaCl flux, and the crystals were characterized with X-ray diffraction, electrical resistivity, heat capacity, and magnetization. The structure...
Electron Doping of Cuprates via Interfaces with Manganites (2007)
Yunoki, S., Moreo, A., Dagotto, E., Okamoto, S., Kancharla, S. S., Fujimori, A.
The electron doping of undoped high-$T_c$ cuprates via the transfer of charge from manganites (or other oxides) using heterostructure geometries is here theoretically discussed. This possibility is...
Band insulator to Mott insulator transition in a bilayer Hubbard model (2007)
The ground state phase diagram of the half-filled repulsive Hubbard model in a bilayer is investigated using cluster dynamical mean field theory. For weak to intermediate values of Coulomb repulsion...
Photoemission from buried interfaces in SrTiO3/LaTiO3 superlattices (2006)
Takizawa, M., Wadati, H., Tanaka, K., Hashimoto, M., Yoshida, T., Fujimori, A., ...
We have measured photoemission spectra of SrTiO3/LaTiO3 superlattices with a topmost SrTiO3 layer of variable thickness. Finite coherent spectral weight with a clear Fermi cut-off was observed at...
Earthquake fault rock indicating a coupled lubrication mechanism (2006)
S. Okamoto, G. Kimura, S. Takizawa, H. Yamaguchi
A pseudotachylyte bounded by a carbonate-matrix implosion breccia was found at a fossilized out-of-sequence thrust in the Shimanto accretionary complex, Japan. This occurrence resulted from the...
Earthquake fault rock indicating a coupled lubrication mechanism (2006)
Okamoto, S., Kimura, G., Takizawa, S., Yamaguchi, H.
A pseudotachylyte bounded by a carbonate-matrix implosion breccia was found at a fossilized out-of-sequence thrust in the Shimanto accretionary complex, Japan. This occurrence resulted from the...
Earthquake fault rock indicating a coupled lubrication mechanism (2006)
Okamoto, S., Kimura, G., Takizawa, S., Yamaguchi, H.
A pseudotachylyte bounded by a carbonate-matrix implosion breccia was found at a fossilized out-of-sequence thrust in the Shimanto accretionary complex, Japan. This occurrence resulted from the...
Earthquake fault rock indicating a coupled lubrication mechanism (2006)
Okamoto, S., Kimura, G., Takizawa, S., Yamaguchi, H.
A pseudotachylyte bounded by a carbonate-matrix implosion breccia was found at a fossilized out-of-sequence thrust in the Shimanto accretionary complex, Japan. This occurrence resulted from the...
Earthquake fault rock indicating a coupled lubrication mechanism (2006)
Okamoto, S., Kimura, G., Takizawa, S., Yamaguchi, H.
A pseudotachylyte bounded by a carbonate-matrix implosion breccia was found at a fossilized out-of-sequence thrust in the Shimanto accretionary complex, Japan. This occurrence resulted from the...
Earthquake fault rock indicating a coupled lubrication mechanism (2006)
S. Okamoto, G. Kimura, S. Takizawa, H. Yamaguchi
A pseudotachylyte bounded by a carbonate-matrix implosion breccia was found at a fossilized out-of-sequence thrust in the Shimanto accretionary complex, Japan. This occurrence resulted from the...
Theory of orbital state and spin interactions in ferromagnetic titanates (2005)
A spin-orbital superexchange Hamiltonian in a Mott insulator with $t_{2g}$ orbital degeneracy is investigated. More specifically, we focus on a spin ferromagnetic state of the model and study a...
Conflicts in teamwork: Hybrids to the rescue (2005)
M. Tambe, E. Bowring, H. Jung, G. Kaminka, R. Maheswaran, J. Marecki, ...
Today within the AAMAS community, we see at least four competing approaches to building multiagent systems: beliefdesire -intention (BDI), distributed constraint optimization (DCOP), distributed...
Conflicts in teamwork: Hybrids to the rescue (2005)
M. Tambe, E. Bowring, H. Jung, G. Kaminka, R. Maheswaran, J. Marecki, ...
Today within the AAMAS community, we see at least four competing approaches to building multiagent systems: beliefdesire-intention (BDI), distributed constraint optimization (DCOP), distributed...
Ferromagnetic insulating phase in Pr{1-x}Ca{x}MnO3 (2003)
Kajimoto, R., Mochizuki, H., Yoshizawa, H., Okamoto, S., Ishihara, S.
A ferromagnetic insulating (FM-I) state in Pr0.75Ca0.25MnO3 has been studied by neutron scattering experiment and theoretical calculation. The insulating behavior is robust against an external...
Okamoto, S., Millis, A. J., Monien, H., Fuhrmann, A.
"Cluster" extensions of the dynamical mean field method to include longer range correlations are discussed. It is argued that the clusters arising in these methods are naturally interpreted not as...
Magnetic Order and Dynamics in an Orbitally Degenerate Ferromagnetic Insulator (2002)
Ulrich, C., Khaliullin, G., Okamoto, S., Reehuis, M., Ivanov, A., He, H., ...
Neutron scattering was used to determine the spin structure and the magnon spectrum of the Mott--Hubbard insulator YTiO$_3$. The magnetic structure is complex, comprising substantial G-type and...
Quantum Behavior of Orbitals in Ferromagnetic Titanates: Novel Orderings and Excitations (2002)
We investigate the collective behavior of orbital angular momentum in the spin ferromagnetic state of a Mott insulator with t(2g) orbital degeneracy. The frustrated nature of the interactions leads...
Magnetic Order and Dynamics in an Orbitally Degenerate Ferromagnetic Insulator (2002)
Ulrich, C., Khaliullin, G., Okamoto, S., Reehuis, M., Ivanov, A., He, H., ...
Neutron scattering was used to determine the spin structure and the magnon spectrum of the Mott-Hubbard insulator YTiO3. The magnetic structure is complex, comprising substantial G-type and A-type...
Theory of Raman Scattering from Orbital Excitations in Manganese Oxides (2001)
Okamoto, S., Ishihara, S., Maekawa, S.
We present a theory of the Raman scattering from the orbital wave excitations in manganese oxides. Two excitation processes of the Raman scattering are proposed. The Raman scattering cross section is...
Okamoto, S., Ishihara, S., Maekawa, S.
Correlation between orbital structure and magnetic ordering in bilayered manganites is examined. A level separation between the $3d_{3z^2-r^2}$ and $3d_{x^2-y^2}$ orbitals in a Mn ion is calculated...
Phase Transition in Perovskite Manganites with Orbital Degree of Freedom (1999)
Okamoto, S., Ishihara, S., Maekawa, S.
Roles of orbital degree of freedom of Mn ions in phase transition as a function of temperature and hole concentration in perovskite manganites are studied. It is shown that the orbital order-disorder...
Okamoto, S., Ishihara, S., Maekawa, S.
The spin and orbital phase diagram for perovskite manganites are investigated as a function of temperature and hole concentration. The superexchange and double exchange interactions dominate the...
Endoh, Y., Hirota, K., Ishihara, S., Okamoto, S., Murakami, Y., Nishizawa, A., ...
A lightly doped perovskite mangantite La_{0.88}Sr_{0.12}MnO_3 exhibits a phase transition at T_{OO}=145 K from a ferromagnetic metal (T_C=172 K) to a novel ferromagnetic insulator.We identify that...
Field Induced Transition from Metal to Insulator in the CMR Manganites (1998)
Endoh, Y., Nojiri, H., Kaneko, K., Hirota, K., Fukuda, T., Kimura, H., ...
The gigantic reduction of the electric resistivity under the applied magnetic field, CMR effect, is now widely accepted to appear in the vicinity of the insulator to metal transition of the...
Maekawa, S., Ishihara, S., Okamoto, S.
A systematic study of the electronic structure in perovskite manganites is presented. The effective Hamiltonian is derived by taking into account the degeneracy of $e_g$ orbitals and strong electron...
The stress corrosion cracking (SCC) susceptibility of sensitized austenitic stainless steels, mainly Type 304 SS, was investigated in oxygenated high purity water and borated water below 240 C;...
Stress corrosion cracking (SCC) susceptibility of sensitized austenitic stainless steels, mainly type 304 SS, was investigated in oxygenated high-purity water and borated water below 240 deg.C;...
POLYARTHRITIS ASSOCIATED WITH HEPATITIS C VIRUS INFECTION (1994)
UENO, Y., KINOSHITA, R., KISHIMOTO, I., OKAMOTO, S.
Two cases of polyarthritis associated with hepatitis C infection are reported. In Patient 1, stiffness and polyarthritis occurred during the acute stage of hepatitis. The arthritic symptoms lasted...
COMPARISON OF SELECTIVE CYTOTOXICITY OF ALKYL LYSOPHOSPHOLIPIDS (1991)
Vogler, W. R., Olson, A. C., Okamoto, S., Shoji, M., Raynor, R. L., Kuo, J. F., ...
MAGNETIC PROPERTIES OF AMORPHOUS FERRIC HYDROXIDE GELS (1979)
Magnetic properties of amorphous ferric hydroxide gels prepared in different conditions are investigated with the aid of Mössbauer spectroscopy. It was revealed that when the ageing proceeded, the...
MAGNETIC PROPERTIES OF AMORPHOUS FERRIC HYDROXIDE GELS (1979)
Magnetic properties of amorphous ferric hydroxide gels prepared in different conditions are investigated with the aid of Mössbauer spectroscopy. It was revealed that when the ageing proceeded, the...
MAGNETIC PROPERTIES OF AMORPHOUS FERRIC HYDROXIDE GELS (1979)
Magnetic properties of amorphous ferric hydroxide gels prepared in different conditions are investigated with the aid of Mössbauer spectroscopy. It was revealed that when the ageing proceeded, the...
MÖSSBAUER EFFECT OF 61Ni IN SPINEL TYPE MAGNETIC OXIDES (1971)
Sekizawa, H., Okada, T., Okamoto, S., Ambe, F.
The Mössbauer spectroscopy of 61Ni was effectively utilized to investigate the internal magnetic fields in Ni-containing oxides with spinel or distorted spinel structure. The internal magnetic...
MÖSSBAUER EFFECT OF 61Ni IN SPINEL TYPE MAGNETIC OXIDES (1971)
Sekizawa, H., Okada, T., Okamoto, S., Ambe, F.
The Mössbauer spectroscopy of 61Ni was effectively utilized to investigate the internal magnetic fields in Ni-containing oxides with spinel or distorted spinel structure. The internal magnetic...
MÖSSBAUER EFFECT OF 61Ni IN SPINEL TYPE MAGNETIC OXIDES (1971)
Sekizawa, H., Okada, T., Okamoto, S., Ambe, F.
The Mössbauer spectroscopy of 61Ni was effectively utilized to investigate the internal magnetic fields in Ni-containing oxides with spinel or distorted spinel structure. The internal magnetic...
Chen, C Y, Eckmann, L, Libby, S J, Fang, F C, Okamoto, S, Kagnoff, M F, ...
Adaptation to the intracellular environment of host cells is crucial for the pathogenesis of Salmonella infections. The alternative sigma factor RpoS is a global regulator of gene expression during...
Okamoto, S, Hamana, Y, Inoue, M, Mitsuhashi, S
T-2588, the pivaloyloxymethyl ester of T-2525, [6R, 7R]-7-[(z)-2-(2-aminothiazol-4-yl)-2-methoxyiminoacetoamido] -3- [(5-methyl-2H-tetrazol-2-yl)methyl]-3-cephem-4-carboxylic acid, is a new oral...
Weintraub, B C, Eckmann, L, Okamoto, S, Hense, M, Hedrick, S M, Fierer, J
Salmonella spp. are facultative intracellular bacteria which enter the body through the intestinal tract. We studied the roles of T cells expressing either the alpha and beta chains or the gamma and...
Shima, J, Hesketh, A, Okamoto, S, Kawamoto, S, Ochi, K
A strain of Streptomyces lividans, TK24, was found to produce a pigmented antibiotic, actinorhodin, although S. lividans normally does not produce this antibiotic. Genetic analyses revealed that a...
Morphological differentiation in microorganisms is usually accompanied by a decrease in intracellular GTP pool size, as has been demonstrated in bacillaceae, streptomycetaceae, and yeasts. The obg...
Kinoshita, H, Ipposhi, H, Okamoto, S, Nakano, H, Nihira, T, Yamada, Y
BarA of Streptomyces virginiae is a specific receptor protein for virginiae butanolides (VBs), a member of the butyrolactone autoregulators of Streptomyces species. Sequencing around the barA gene...
Koyama, Y, Okamoto, S, Furukawa, K
The genes encoding thermostable alpha- and beta-galactosidases from an extremely thermophilic bacterium, Thermus strain T2, were cloned in Escherichia coli. The alpha-galactosidase gene was located...
Mitsuyama, J, Itoh, Y, Takahata, M, Okamoto, S, Yasuda, T
The antibacterial activities of tosufloxacin and other quinolones against and apparent uptakes of tosufloxacin and other quinolones by outer membrane mutants of Escherichia coli, Proteus mirabilis,...
Okuda, J, Okamoto, S, Takahata, M, Nishino, T
The activities of new quinolones against 140 strains of methicillin-resistant Staphylococcus aureus were determined. From the relationship between the MICs of sparfloxacin and ciprofloxacin,...
Heffernan, E J, Wu, L, Louie, J, Okamoto, S, Fierer, J, Guiney, D G
Virulence-associated phenotypes of an outer membrane protein gene family of members of the family Enterobacteriaceae were compared by means of pBR322 constructs transformed into Escherichia coli...
Miao, D M, Sakai, H, Okamoto, S, Tanaka, K, Okuda, M, Honda, Y, ...
The replication origin of the broad host-range plasmid RSF1010 contains 3.5 copies of a 20mer iteron sequence that bind specifically to the plasmid-encoded initiator, RepC. Here we demonstrated that...
Shimizu, H, Mitomo, K, Watanabe, T, Okamoto, S, Yamamoto, K
Interleukin-6 (IL-6) is one of the major mediators of inflammation, and its expression is inducible by the other inflammatory lymphokines, interleukin-1 (IL-1) and tumor necrosis factor alpha...
Nakayama, K, Shimizu, H, Mitomo, K, Watanabe, T, Okamoto, S, Yamamoto, K
The proto-oncoprotein c-Rel is a member of the nuclear factor kappa B transcription factor family, which includes the p50 and p65 subunits of nuclear factor kappa B. We show here that c-Rel binds to...
Kurachi, H, Okamoto, S, Oka, T
The submandibular gland is a rich source of epidermal growth factor (EGF) in mice. The concentration of EGF in the gland of virgin female mice of C3H/HeN strain increased as much as 9-fold from the...
Female virgin mice, whose submandibular glands were removed, underwent normal pregnancy and delivery. During the nursing period, however, a substantial number of pups born to and nursed by...
Kitamura, T, Kimura, K, Jung, B D, Makondo, K, Okamoto, S, Cañas, X, ...
It has been demonstrated that proinsulin C-peptide possesses several biological activities and that its specific binding sites are present on the surface of cell membranes. However, the molecular and...
Chen, C Y, Eckmann, L, Libby, S J, Fang, F C, Okamoto, S, Kagnoff, M F, ...
Adaptation to the intracellular environment of host cells is crucial for the pathogenesis of Salmonella infections. The alternative sigma factor RpoS is a global regulator of gene expression during...
Okamoto, S, Hamana, Y, Inoue, M, Mitsuhashi, S
T-2588, the pivaloyloxymethyl ester of T-2525, [6R, 7R]-7-[(z)-2-(2-aminothiazol-4-yl)-2-methoxyiminoacetoamido] -3- [(5-methyl-2H-tetrazol-2-yl)methyl]-3-cephem-4-carboxylic acid, is a new oral...
Weintraub, B C, Eckmann, L, Okamoto, S, Hense, M, Hedrick, S M, Fierer, J
Salmonella spp. are facultative intracellular bacteria which enter the body through the intestinal tract. We studied the roles of T cells expressing either the alpha and beta chains or the gamma and...
Shima, J, Hesketh, A, Okamoto, S, Kawamoto, S, Ochi, K
A strain of Streptomyces lividans, TK24, was found to produce a pigmented antibiotic, actinorhodin, although S. lividans normally does not produce this antibiotic. Genetic analyses revealed that a...
Morphological differentiation in microorganisms is usually accompanied by a decrease in intracellular GTP pool size, as has been demonstrated in bacillaceae, streptomycetaceae, and yeasts. The obg...
Kinoshita, H, Ipposhi, H, Okamoto, S, Nakano, H, Nihira, T, Yamada, Y
BarA of Streptomyces virginiae is a specific receptor protein for virginiae butanolides (VBs), a member of the butyrolactone autoregulators of Streptomyces species. Sequencing around the barA gene...
Koyama, Y, Okamoto, S, Furukawa, K
The genes encoding thermostable alpha- and beta-galactosidases from an extremely thermophilic bacterium, Thermus strain T2, were cloned in Escherichia coli. The alpha-galactosidase gene was located...
Mitsuyama, J, Itoh, Y, Takahata, M, Okamoto, S, Yasuda, T
The antibacterial activities of tosufloxacin and other quinolones against and apparent uptakes of tosufloxacin and other quinolones by outer membrane mutants of Escherichia coli, Proteus mirabilis,...
Okuda, J, Okamoto, S, Takahata, M, Nishino, T
The activities of new quinolones against 140 strains of methicillin-resistant Staphylococcus aureus were determined. From the relationship between the MICs of sparfloxacin and ciprofloxacin,...
Heffernan, E J, Wu, L, Louie, J, Okamoto, S, Fierer, J, Guiney, D G
Virulence-associated phenotypes of an outer membrane protein gene family of members of the family Enterobacteriaceae were compared by means of pBR322 constructs transformed into Escherichia coli...
Miao, D M, Sakai, H, Okamoto, S, Tanaka, K, Okuda, M, Honda, Y, ...
The replication origin of the broad host-range plasmid RSF1010 contains 3.5 copies of a 20mer iteron sequence that bind specifically to the plasmid-encoded initiator, RepC. Here we demonstrated that...
Shimizu, H, Mitomo, K, Watanabe, T, Okamoto, S, Yamamoto, K
Interleukin-6 (IL-6) is one of the major mediators of inflammation, and its expression is inducible by the other inflammatory lymphokines, interleukin-1 (IL-1) and tumor necrosis factor alpha...
Nakayama, K, Shimizu, H, Mitomo, K, Watanabe, T, Okamoto, S, Yamamoto, K
The proto-oncoprotein c-Rel is a member of the nuclear factor kappa B transcription factor family, which includes the p50 and p65 subunits of nuclear factor kappa B. We show here that c-Rel binds to...
Kurachi, H, Okamoto, S, Oka, T
The submandibular gland is a rich source of epidermal growth factor (EGF) in mice. The concentration of EGF in the gland of virgin female mice of C3H/HeN strain increased as much as 9-fold from the...
Female virgin mice, whose submandibular glands were removed, underwent normal pregnancy and delivery. During the nursing period, however, a substantial number of pups born to and nursed by...
Kitamura, T, Kimura, K, Jung, B D, Makondo, K, Okamoto, S, Cañas, X, ...
It has been demonstrated that proinsulin C-peptide possesses several biological activities and that its specific binding sites are present on the surface of cell membranes. However, the molecular and...
Rikiishi, H, Okamoto, S, Sugawara, S, Tamura, K, Liu, Z X, Kumagai, K
A superantigen (Streptococcus pyogenes mitogen-2; SPM-2) that stimulates human helper T cells bearing unique types of variable domains of T-cell receptor beta-chain (TCR V beta) was isolated from the...
Dry eye after haematopoietic stem cell transplantation
Ogawa, Y., Okamoto, S., Wakui, M., Watanabe, R., Yamada, M., Yoshino, M., ...
AIMS—To determine the incidence, natural course, and severity of dry eye occurring or worsening after haematopoietic stem cell transplantation (SCT). METHODS—At a tertiary care hospital,...
Thymus lymphocytes in uraemic rats and the effect of thymosin fraction 5 in vivo.
Ikemoto, S, Kamizuru, M, Hayahara, N, Okamoto, S, Wada, S, Kishimoto, T, ...
Thymus lymphocyte subsets in uraemic rats were studied using monoclonal antibodies. Severe and moderate uraemia was induced in rats, and sham-operated and normal rats were used as the controls. As a...
OKAMOTO, M, TAKAGI, M, KUTSUNA, M, HARA, Y, NISHIHARA, M, ZHANG, M C, ...
MRL/Mp mice bearing the Fas deletion mutant gene, lpr (MRL/lpr), spontaneously develop polyarthritis, sialoadenitis and dacryoadenitis, resembling rheumatoid arthritis (RA), and also corneal...
Matsuoka, K, Inoue, N, Sato, T, Okamoto, S, Hisamatsu, T, Kishi, Y, ...
Background and aims: Many lines of evidence suggest that T helper cell type 1 (Th1) immune responses predominate in Crohn’s disease (CD). Recently, a novel transcription factor T-box expressed in T...
Miyamori, I, Ikeda, M, Matsubara, T, Okamoto, S, Koshida, H, Yasuhara, S, ...
The renal, cardiovascular and hormonal effects of intravenous infusion of alpha-human atrial natriuretic polypeptides (alpha-hANP) at the concentrations of 0.0125, 0.025, 0.05, 0.1 microgram kg-1...
Tenascin in cerebrospinal fluid is a useful biomarker for the diagnosis of brain tumour.
Yoshida, J, Wakabayashi, T, Okamoto, S, Kimura, S, Washizu, K, Kiyosawa, K, ...
Tenascin, an extracellular matrix glycoprotein, has been reported to be expressed predominantly on glioma tissue in the CNS, both in a cell associated and an excreted form. Recently, a highly...
Osteopontin/Eta-1 upregulated in Crohn’s disease regulates the Th1 immune response
Sato, T, Nakai, T, Tamura, N, Okamoto, S, Matsuoka, K, Sakuraba, A, ...
Background and aims: The pathogenesis of Crohn’s disease (CD), a chronic inflammatory bowel disease characterised by a Th1 immune response, remains unclear. Osteopontin (OPN) is a phosphoprotein...
Okamoto, S., Yoshikawa, K., Obata, Y., Shibuya, M., Aoki, S., Yoshida, J., ...
A mouse monoclonal antibody (IgG2b), 3C10, was produced against the truncated epidermal growth factor receptor (EGFR), encoded by the (type III) in-frame deletion mutation of 801 nucleotides of EGFR...
Sugawara, I., Uchino, K., Morishita, Y., Yagura, T., Okamoto, S., Mori, S.
We have successfully established one murine hybridoma that secretes a monoclonal antibody specific for the 77,000 subunit of human DNA polymerase alpha. The results of immunochemical studies, using...