Search Results - (Author, Cooperation:Y. Ohta)
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1Latest Papers from Table of Contents or Articles in PressT. Yamaguchi, K. Sugimoto, Y. Ohta, Y. Tanaka, and H. Sato
American Physical Society (APS)
Published 2018Staff ViewPublication Date: 2018-04-06Publisher: American Physical Society (APS)Print ISSN: 1098-0121Electronic ISSN: 1095-3795Topics: PhysicsKeywords: Electronic structure and strongly correlated systemsPublished by: -
2Latest Papers from Table of Contents or Articles in PressIshida, Y., Ohta, K., Naruse, T., Kato, H., Fukui, A., Shigeishi, H., Nishi, H., Tobiume, K., Takechi, M.
The American Society for Microbiology (ASM)
Published 2018Staff ViewPublication Date: 2018-03-23Publisher: The American Society for Microbiology (ASM)Print ISSN: 0019-9567Electronic ISSN: 1098-5522Topics: MedicinePublished by: -
3Latest Papers from Table of Contents or Articles in PressT. Sun ; K. Wang ; T. Iinuma ; R. Hino ; J. He ; H. Fujimoto ; M. Kido ; Y. Osada ; S. Miura ; Y. Ohta ; Y. Hu
Nature Publishing Group (NPG)
Published 2014Staff ViewPublication Date: 2014-09-19Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsPublished by: -
4Latest Papers from Table of Contents or Articles in PressB. Venkatesh ; A. P. Lee ; J. B. Swann ; Y. Ohta ; M. F. Flajnik ; M. Kasahara ; T. Boehm ; W. C. Warren
Nature Publishing Group (NPG)
Published 2014Staff ViewPublication Date: 2014-07-11Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsKeywords: Animals ; *Evolution, Molecular ; Genome/*genetics ; Sharks/*geneticsPublished by: -
5Latest Papers from Table of Contents or Articles in PressB. Venkatesh ; A. P. Lee ; V. Ravi ; A. K. Maurya ; M. M. Lian ; J. B. Swann ; Y. Ohta ; M. F. Flajnik ; Y. Sutoh ; M. Kasahara ; S. Hoon ; V. Gangu ; S. W. Roy ; M. Irimia ; V. Korzh ; I. Kondrychyn ; Z. W. Lim ; B. H. Tay ; S. Tohari ; K. W. Kong ; S. Ho ; B. Lorente-Galdos ; J. Quilez ; T. Marques-Bonet ; B. J. Raney ; P. W. Ingham ; A. Tay ; L. W. Hillier ; P. Minx ; T. Boehm ; R. K. Wilson ; S. Brenner ; W. C. Warren
Nature Publishing Group (NPG)
Published 2014Staff ViewPublication Date: 2014-01-10Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsKeywords: Animals ; Calcium/metabolism ; Cell Lineage/immunology ; *Evolution, Molecular ; Fish Proteins/classification/genetics ; Gene Deletion ; Genome/*genetics ; Genomics ; Immunity, Cellular/genetics ; Molecular Sequence Annotation ; Molecular Sequence Data ; Osteogenesis/genetics ; Phosphoproteins/genetics/metabolism ; Phylogeny ; Protein Structure, Tertiary/genetics ; Sharks/*genetics/immunology ; T-Lymphocytes/cytology/immunology ; Time Factors ; Vertebrates/classification/genetics ; Zebrafish/genetics/growth & developmentPublished by: -
6Latest Papers from Table of Contents or Articles in PressN. Katayama, S. Tamura, T. Yamaguchi, K. Sugimoto, K. Iida, T. Matsukawa, A. Hoshikawa, T. Ishigaki, S. Kobayashi, Y. Ohta, and H. Sawa
American Physical Society (APS)
Published 2018Staff ViewPublication Date: 2018-08-08Publisher: American Physical Society (APS)Print ISSN: 1098-0121Electronic ISSN: 1095-3795Topics: PhysicsKeywords: Electronic structure and strongly correlated systemsPublished by: -
7Latest Papers from Table of Contents or Articles in PressRedmond, A. K., Ohta, Y., Criscitiello, M. F., Macqueen, D. J., Flajnik, M. F., Dooley, H.
The American Association of Immunologists (AAI)
Published 2018Staff ViewPublication Date: 2018-10-10Publisher: The American Association of Immunologists (AAI)Print ISSN: 0022-1767Electronic ISSN: 1550-6606Topics: MedicinePublished by: -
8Articles: DFG German National LicensesStaff View
ISSN: 1089-7623Source: AIP Digital ArchiveTopics: PhysicsElectrical Engineering, Measurement and Control TechnologyNotes: A two-thermocouple probe, composed of two fine-wire thermocouples of unequal diameters, is a novel technique for estimating thermocouple time constants without any dynamic calibration of the thermocouple response. This technique is most suitable for measuring fluctuating temperatures in turbulent combustion. In the present study, the reliability and applicability of this technique are appraised in a turbulent wake of a heated cylinder (without combustion). A fine-wire resistance thermometer (cold wire) of fast response is simultaneously used to provide a reference temperature. A quantitative and detailed comparison between the cold-wire measurement and the compensated thermocouple ones shows that a previous estimation scheme gives thermocouple time constants smaller than appropriate values, unless the noise in the thermocouple signals is negligible and/or the spatial resolution of the two-thermocouple probe is sufficiently high. The scheme has been improved so as to maximize the correlation coefficient between the two compensated-thermocouple outputs. The improved scheme offers better compensation of the thermocouple response. The present approach is generally applicable to in situ parameter identification of a first-order lag system. © 1998 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
9Articles: DFG German National LicensesStaff View
ISSN: 1525-1314Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: GeosciencesNotes: Abstract The central sector of Mühlig-Hofmannfjellet (3°E/71°S) in western Dronning Maud Land (East Antarctic shield) is dominated by large intrusive bodies of predominantly orthopyroxene-bearing quartz syenites (charnockites). Metasedimentary rocks are rare; however, two distinct areas with banded gneiss–marble–quartzite sequences of sedimentary origin were found during the Norwegian Antarctic Research Expedition NARE 1989/90. Cordierite-bearing metapelitic gneisses from two different localities contain the characteristic mineral assemblage: cordierite + garnet + biotite + K-feldspar + plagioclase + quartz ± sillimanite ± spinel. Thermobarometry indicates equilibration conditions of about 650°C and 4 kbar. Associated orthopyroxene–garnet granulites, on the other hand, revealed pressures of about 8 kbar and temperatures of 750°C. The earlier granulite facies metamorphism is not well preserved in the cordierite gneisses as a result of excess K-feldspar combined with interaction with an H2O-rich fluid phase, probably released by the cooling intrusives. These two features allowed the original high-grade K-feldspar + garnet assemblages to recrystallize as cordierite–biotite–sillimanite gneisses, completely re-equilibrating them. Phase relationships indicate that the younger metamorphic event occurred in the presence of a fluid phase that varied in composition between the lithologies.Type of Medium: Electronic ResourceURL: -
10Articles: DFG German National LicensesOgawa-Goto, K. ; Funamoto, N. ; Ohta, Y. ; Abe, T. ; Nagashima, K.
Oxford, UK : Blackwell Publishing Ltd
Published 1992Staff ViewISSN: 1471-4159Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: MedicineNotes: Abstract: Myelins of the PNS were isolated from human motor and sensory nerves of cauda equina, and their ganglioside compositions were compared. The predominant ganglioside in the human PNS myelins, both from motor and sensory nerves, was LM1 (sialosylneolactotetraosylceramide). Sialosyl-nLc6Cer and disialosyl-nLc4Cer, GD3, GM3, and GDlb were detected as common components of the two nerve myelins. Furthermore, it was revealed that the motor nerve myelin contained GM1 (about 15% of total gangliosides), whereas sensory nerve myelin contained only a trace amount of GM1 (less than 5%), by TLC analyses together with TLC immunostaining using anti-GM 1 antibody. As for the disialoganglioside fraction, the content of GD1 a, as well as that of GM1, differed in motor and sensory nerves. Thus, the different contents of the ganglioseries gangliosides in human motor and sensory nerve myelins were demonstrated.Type of Medium: Electronic ResourceURL: -
11Articles: DFG German National LicensesOgawa-Goto, K. ; Ohta, Y. ; Kubota, K. ; Funamoto, N. ; Abe, T. ; Taki, T. ; Nagashima, K.
Oxford, UK : Blackwell Publishing Ltd
Published 1993Staff ViewISSN: 1471-4159Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: MedicineNotes: Abstract: Compositions of neutral and sulfated glucuronyl glycosphingolipids purified from human motor and sensory nerves and myelins were studied. Higher neutral glycosphingolipids (fraction B), which were separated from GazlCer (fraction A), were analyzed by TLC and TLC-immunostaining. Both nerve myelins contained paragloboside (nLc4Cer) and nLc6Cer dominantly as major higher glycosphingolipids and very little globoside (Gb4Cer), whereas both nerves contained Gb4Cer and nLc4Cer. Besides these major glycosphingolipids, a neutral glycolipid containing asialoGMI (Gg4Cer) epitope and other minor components such as ceramide trihexoside and ceramide dihexoside were detected in both nerves and their myelins. Furthermore, sulfated glucuronyl nLc4Cer and n Lc6Cer, which were monoclonal antibody HNK-1 reactive glycolipids, were detected in both nerves and myelins.Type of Medium: Electronic ResourceURL: -
12Articles: DFG German National LicensesOhta, Y. ; Kitayama, M. ; Kaneko, K. ; Toh, S. ; Shimizu, F. ; Morinaga, K.
Oxford, UK : Blackwell Science Inc
Published 2005Staff ViewISSN: 1551-2916Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision MechanicsPhysicsNotes: The capacitance of the Na2O–SiO2 glass was measured in situ during heat treatment at various frequencies, 20, 100, 1, 3, 10, and 30 kHz. It was found that the capacitance of the glass abruptly decreases after a certain duration. The glass was quenched at this stage. It was confirmed by the X-ray diffraction and transmission electron microscopy that this decrease of capacitance was associated with the formation of crystallites in the glass matrix. The size of crystallites was observed to be in the range of about 10 nm.Type of Medium: Electronic ResourceURL: -
13Articles: DFG German National LicensesShimizu, J. ; Hiroshima, T. ; Ajisawa, A. ; Sugimoto, M. ; Ohta, Y.
Woodbury, NY : American Institute of Physics (AIP)
Published 1988Staff ViewISSN: 1077-3118Source: AIP Digital ArchiveTopics: PhysicsNotes: The measurements of the polarization dependence of field-induced refractive index changes in GaAs/AlAs multiple quantum wells, which are directly measured by using the modulation spectroscopy method for the TE and TM modes, are described. Clear polarization dependences, such as differences in the spectra shape and the peak wavelength, were observed. The polarization dependences originate from the different excitonic transitions: the n=1 heavy-hole and light-hole exciton for the TE mode and the n=1 light-hole exciton for the TM mode. The experimental results show qualitatively good agreement with the theoretical calculation.Type of Medium: Electronic ResourceURL: -
14Articles: DFG German National LicensesStaff View
ISSN: 1089-7658Source: AIP Digital ArchiveTopics: MathematicsPhysicsNotes: In general, Whitham dynamics involves infinitely many parameters called Whitham times, but in the context of N=2 supersymmetric Yang–Mills theory it can be regarded as a finite system by restricting the number of Whitham times appropriately. For example, in the case of SU(r+1) gauge theory without hypermultiplets, there are r Whitham times and they play an essential role in the theory. In this situation, the generating meromorphic one-form of the Whitham hierarchy on the Seiberg–Witten curve is represented by a finite linear combination of meromorphic one-forms associated with these Whitham times, but it turns out that there are various differential relations among these differentials. Since these relations can be written only in terms of the Seiberg–Witten one-form, their consistency conditions are found to give the Picard–Fuchs equations for the Seiberg–Witten periods. © 1999 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
15Articles: DFG German National LicensesStaff View
ISSN: 1089-7658Source: AIP Digital ArchiveTopics: MathematicsPhysicsNotes: An Abelian topological action is constructed from the quantization of Seiberg–Witten monopole equations as "Langevin equations." The starting point is an analogous action to the Labastida–Pernici's non-supersymmetric action for Donaldson theory. As the local symmetry of the action is first stage reducible, the quantum action is obtained by using Batalin–Vilkovisky quantization procedure. We can also obtain off-shell quantum action and BRST transformation. © 1997 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
16Articles: DFG German National LicensesStaff View
ISSN: 1751-8369Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: GeographyGeosciencesNotes: Orientation of the complex Knipovich-Lena spreading/transform system closely follows the secondary shear and extensional orientations that existed within adjacent continental crust prior to rifting. Major dextral faults and shear zones within continental crust appear to have affected both the lower crust and upper mantle during extension and to have caused the localization of the early transform rift system.Type of Medium: Electronic ResourceURL: -
17Articles: DFG German National LicensesBALAŠOV, JU. A. ; TEBEN'KOV, A. M. ; OHTA, Y. ; LARIONOV, A. N. ; SIROTKIN, A. N. ; GANNIBAL, L. F. ; RYUNGENEN, G. I.
Oxford, UK : Blackwell Publishing Ltd
Published 1995Staff ViewISSN: 1751-8369Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: GeographyGeosciencesNotes: Proterozoic metasupracrustal rocks form a NNW-SSE trending basement zone along the western coast of Spitsbergen. The rocks show complex structures as a result of both Caledonian and Tertiary deformation, and most of the subordinate metaigneous rocks are not suitable for isotopic age determination. Some zircon-bearing rocks were found in the southwestern part of Spitsbergen and an attempt of U-Pb dating was performed.U-Pb dating was carried out on zircon fractions from quartz porphyry and rhyolite clasts in a metaconglomerate unit of the Pyttholmen Formation northwest of Hornsund, southwestern Spitsbergen. The Pyttholmen Formation is considered to be a lateral equivalent of the upper part of the Gulliksenfjellet quartzite and in the same time as the upper part of the Skålfjellet metavolcanites. Therefore, the obtained ages are applicable to the age of the Skålfjellet igneous activities. Some of the dated samples are strongly schistose and their magmatic origin is difficult to confirm; the interpretation of the isotopic results is not well constrained; however, some explanations are possible which refer to the known geological conditions; an igneous age of siliceous volcanic rocks of ca. 1200 Ma, inherited zircon ages of ca. 2500 Ma and a regional metamorphic age of ca. 930 Ma. The last age belongs to the Grenvillian period and is conformable with the Rb/Sr whole rock age obtained from the garnet-biotite schists of the Isbjernhamna Group underlying the Skålfjellet metavolcanites.Type of Medium: Electronic ResourceURL: -
18Articles: DFG German National LicensesNakamura, M. ; Ichimura, M. ; Ohta, Y. ; Oikawa, M. ; Tanaka, S. ; Kogi, Y. ; Shima, Y. ; Saosaki, S. ; Kadoya, K. ; Kawabata, T. ; Kano, H. ; Itakura, A. ; Hojo, H.
[S.l.] : American Institute of Physics (AIP)
Published 2001Staff ViewISSN: 1089-7623Source: AIP Digital ArchiveTopics: PhysicsElectrical Engineering, Measurement and Control TechnologyNotes: In the GAMMA10 tandem mirror, a strong ion cyclotron range of frequency heating is performed. As a result of the heating, the Alfvén ion cyclotron (AIC) modes are spontaneously excited due to the strong temperature anisotropy. The AIC modes in the GAMMA10 are excited as the axial eigenmodes and detected at the whole of the device. In the recent experiments, the clear standing wave structure is observed with the magnetic probe measurements. Characteristics of the AIC modes and the measurement of the axial profile are presented. © 2001 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
19Articles: DFG German National LicensesIchimura, M. ; Ohta, Y. ; Motegi, S. ; Nakamura, M. ; Tanaka, S. ; Kanazawa, S. ; Saosaki, S. ; Nakagawa, C. ; Sakata, K. ; Kadoya, K. ; Kawabata, T. ; Oikawa, M. ; Kano, H. ; Sasaki, M. ; Hojo, H. ; Yatsu, K.
[S.l.] : American Institute of Physics (AIP)
Published 2001Staff ViewISSN: 1089-7623Source: AIP Digital ArchiveTopics: PhysicsElectrical Engineering, Measurement and Control TechnologyNotes: A probe wave system was constructed for studying the excitation of the Alfvén ion cyclotron (AIC) modes in the anchor cell of the GAMMA 10 tandem mirror. In the central cell, the AIC modes are spontaneously excited as axial eigenmodes due to the strong temperature anisotropy. In the anchor cell, the AIC modes were not observed though the anisotropy is the same as in the central cell. The axial profiles of the magnetic field strength and plasma parameters in the anchor cell are different from those in the central cell. Eigenmodes are excited externally in the AIC frequency range by injecting probe waves. This suggests the AIC modes are unstable in the anchor cell and grow to the detectable level when boundary conditions are realized. © 2001 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
20Articles: DFG German National LicensesOhta, Y. ; Hoki, K. ; Fujimura, Y.
College Park, Md. : American Institute of Physics (AIP)
Published 2002Staff ViewISSN: 1089-7690Source: AIP Digital ArchiveTopics: PhysicsChemistry and PharmacologyNotes: We have developed a new type of stimulated Raman adiabatic passage (STIRAP) that is applicable to a degenerated reaction system. The direction of the photon polarization vector is the adiabatic parameter in the STIRAP. The molecular handedness of H2POSH, a preoriented phosphinotioic acid that has two stable configurations, L and R enantiomers, is used as a model system. The control of molecular handedness in both pure and mixed state cases are considered. In the case of a pure state, a STIRAP with a linearly polarized single laser allows an almost complete transfer from an L (R) enantiomer to the other by adiabatically changing its polarization direction. The adiabatic criterion for changing the polarization direction is clarified. In the case of a mixed state, a STIRAP with two linearly polarized laser pulses allows a selective preparation of pure enantiomers from its racemic mixture. In the low temperature limit, a five-level model reduces a three-level model by setting the direction of the polarization of the pump and Stokes pulses in such a way that only the forward transfer is allowed, while the reverse is forbidden. Furthermore, in the case of mixed state, relaxation effects originating from vibrational mode couplings are taken into account, and the influence of the population decay from intermediate states on the STIRAP is compared with that by a π-pulse approach. © 2002 American Institute of Physics.Type of Medium: Electronic ResourceURL: