Search

Your search keyword '"Nagahama T"' showing total 672 results
Start Over Author "Nagahama T"
672 results on '"Nagahama T"'

51. Recent Innovations & Daily Problems. A new prosthesis in inguinal hernia repair:preliminary results of a pilot study

Author

Tsai, Y, Ross, N, Niebuhr, H, Sailer, M, Köckerling, F, Sun, L, Shen, Y, Chen, J, Liu, S, Chen, F, Yang, G, Berney, C, Malouf, P, Suarez, D, Tavera, J, Ocadiz, J, Chen, T, Wang, J, Mancini, R, Pattaro, G, Ceci, F, Spaziani, E, Bansa, B, Lal, P, Sharma, R, Pradhan, G, Chander, J, Ramteke, V, Wijerathne, S, Agarwal, N, Liem, D, Lomanto, D, Warren, J, Cobb, W, Ewing, J, Carbonell, A, Guillaume, O, Holl, E, Park, J, Monforte, X, Redl, H, Petter Puchner, A, Gruber Blum, S, Teuschl, A, Yoshihara, E, Pottel, H, D'Hondt, M, Jadhav, P, Nagahama, T, Ando, M, Ami, K, Amagasa, H, Ganno, H, Arai, K, Kitamura, M, El Hayek, K, Yoo, J, Phillips, M, Pauli, E, Bittner, J, Kroh, M, Garcia, D, Furtado, T, Alberti, L, Neto, C, Hubner, P, Alves, A, Oliveira, C, Vianna, J, Campolina, C, Dumanian, G, Dumanian, Z, Tulaimat, A, Chen, S, Liu, L, Guttadauro, A, Frassani, S, Macchini, D, Bertolini, A, Maternini, M, Gabrielli, F, Subramanian, V, Venditti, D, De Majo, A, Sena, G, Lisi, G, De Sanctis, F, Petrella, G, Porwal, A, Jadhav, M, Stein, M, Kaveggia, L, Clift, J, and Noda, W

Subjects
Settore MED/18 - Chirurgia Generale
Published
2015

52. Tunnel magnetoresistance effect in a magnetic tunnel junction with a B2-Fe3Sn electrode.

Author

Goto, Y., Yanase, T., Shimada, T., Shirai, M., and Nagahama, T.

Subjects
MAGNETIC tunnelling, TUNNEL magnetoresistance, QUANTUM tunneling, TUNNEL junctions (Materials science), ELECTRODES
Abstract

In magnetic tunnel junctions (MTJs), the tunnel resistance varies as a function of the relative magnetic configuration of the electrode, in an effect called tunnel magnetoresistance (TMR). The material of which the electrodes are composed is of great importance, because TMR is very sensitive to the electronic states of the electrodes. Additionally, structural defects at the interface also have a significant influence on TMR. In this study, we employ B2-Fe3Sn as the magnetic electrode of MTJs. The use of Fe3Sn could solve the problem of lattice mismatch between Fe and MgO. However, the presence of dissimilar atoms in the electrodes or interface oxidation could be a source of defects at the interface. We find that MTJs with Fe3Sn exhibit a TMR of 50% and an asymmetric bias dependence. [ABSTRACT FROM AUTHOR]

Published
2019
Full Text
View/download PDF

53. Quantum size effect in magnetic tunnel junctions with ultrathin Fe(001) electrodes

Author

Nagahama, T., Yuasa, S., Suzuki, Y., and Tamura, E.

Subjects
Quantum wells -- Research, Dielectric films -- Research, Thin films -- Research, Iron compounds -- Chemical properties, Physics
Abstract

Investigation of the magnetic tunnel junctions (MTJs) with an ultrathin single-crystalline Fe(001) electrode is presented. It is concluded that the MTJs with quantum-well states have the potential to serve as tools for studying the spin dependent in MTJs.

Published
2002

58. Recent Innovations & Daily Problems

Author

Tsai, Y, Ross, N, Niebuhr, H, Sailer, M, Köckerling, F, Sun, L, Shen, Y, Chen, J, Liu, S, Chen, F, Yang, G, Berney, C, Malouf, P, Suarez, D, Tavera, J, Ocadiz, J, Chen, T, Wang, J, Mancini, R, Pattaro, G, Ceci, F, Spaziani, E, Bansa, B, Lal, P, Sharma, R, Pradhan, G, Chander, J, Ramteke, V, Wijerathne, S, Agarwal, N, Liem, D, Lomanto, D, Warren, J, Cobb, W, Ewing, J, Carbonell, A, Guillaume, O, Holl, E, Park, J, Monforte, X, Redl, H, Petter Puchner, A, Gruber Blum, S, Teuschl, A, Yoshihara, E, Pottel, H, D'Hondt, M, Jadhav, P, Nagahama, T, Ando, M, Ami, K, Amagasa, H, Ganno, H, Arai, K, Kitamura, M, El Hayek, K, Yoo, J, Phillips, M, Pauli, E, Bittner, J, Kroh, M, Garcia, D, Furtado, T, Alberti, L, Neto, C, Hubner, P, Alves, A, Oliveira, C, Vianna, J, Campolina, C, Dumanian, G, Dumanian, Z, Tulaimat, A, Chen, S, Liu, L, Guttadauro, A, Frassani, S, Macchini, D, Bertolini, A, Maternini, M, Gabrielli, F, Subramanian, V, Venditti, D, De Majo, A, Sena, G, Lisi, G, De Sanctis, F, Petrella, G, Porwal, A, Jadhav, M, Stein, M, Kaveggia, L, Clift, J, Noda, W, Niebuhr, H., GUTTADAURO, ANGELO, FRASSANI, SILVIA, MACCHINI, DANIELE, GABRIELLI, FRANCESCO, Tsai, Y, Ross, N, Niebuhr, H, Sailer, M, Köckerling, F, Sun, L, Shen, Y, Chen, J, Liu, S, Chen, F, Yang, G, Berney, C, Malouf, P, Suarez, D, Tavera, J, Ocadiz, J, Chen, T, Wang, J, Mancini, R, Pattaro, G, Ceci, F, Spaziani, E, Bansa, B, Lal, P, Sharma, R, Pradhan, G, Chander, J, Ramteke, V, Wijerathne, S, Agarwal, N, Liem, D, Lomanto, D, Warren, J, Cobb, W, Ewing, J, Carbonell, A, Guillaume, O, Holl, E, Park, J, Monforte, X, Redl, H, Petter Puchner, A, Gruber Blum, S, Teuschl, A, Yoshihara, E, Pottel, H, D'Hondt, M, Jadhav, P, Nagahama, T, Ando, M, Ami, K, Amagasa, H, Ganno, H, Arai, K, Kitamura, M, El Hayek, K, Yoo, J, Phillips, M, Pauli, E, Bittner, J, Kroh, M, Garcia, D, Furtado, T, Alberti, L, Neto, C, Hubner, P, Alves, A, Oliveira, C, Vianna, J, Campolina, C, Dumanian, G, Dumanian, Z, Tulaimat, A, Chen, S, Liu, L, Guttadauro, A, Frassani, S, Macchini, D, Bertolini, A, Maternini, M, Gabrielli, F, Subramanian, V, Venditti, D, De Majo, A, Sena, G, Lisi, G, De Sanctis, F, Petrella, G, Porwal, A, Jadhav, M, Stein, M, Kaveggia, L, Clift, J, Noda, W, Niebuhr, H., GUTTADAURO, ANGELO, FRASSANI, SILVIA, MACCHINI, DANIELE, and GABRIELLI, FRANCESCO

Published
2015

59. Inelastic tunneling spectra of MgO barrier magnetic tunneling junctions showing large magnon contribution.

Author

Bang, Do, Nozaki, T., Djayaprawira, D. D., Shiraishi, M., Suzuki, Y., Fukushima, A., Kubota, H., Nagahama, T., Yuasa, S., Maehara, H., Tsunekawa, K., Nagamine, Y., Watanabe, N., and Itoh, H.

Subjects
TUNNELING spectroscopy, MAGNONS, MAGNESIUM, OXIDES, ELECTRODES, MAGNETORESISTANCE, MAGNETRON sputtering
Abstract

We investigated bias-voltage and temperature dependence of conductivity arising from the magnon contribution in MgO-based magnetic tunneling junctions (MTJs) with different ferromagnetic electrodes. Second derivative conductance curves showed broad peak structure, which extends from 5 to 200 mV, accompanied by additional peaks at around 23, 54, and 85 mV. The peak intensities were larger for antiparallel configuration than for parallel configuration except that at 85 mV. This difference in the peak intensity was observed to be larger for the MTJs having higher tunneling magnetoresistance ratio, indicating a magnetic origin of these peaks. Abrupt increase in the second derivative conductance at very low biasing voltage in the antiparallel configuration suggests the important role of the surface magnon excitation. [ABSTRACT FROM AUTHOR]

Published
2009
Full Text
View/download PDF

60. Ozone and Temperature Lidar observations in mid-latitude NDACC station at Río Gallegos (51°36‘ S, 69° 19‘ W), Patagonia Argentina

Author

Salvador, Jacobo, F. Orte, P., Wolfram, E., D’Elia, R., Bulnes, D., Quiroga, J., Sofia, O, Nagahama, T., Kojima, Y., Kuwahara, T., Nakane, H., Maezawa, H., Quel, E., and Mizuno, A.

Abstract

第4回極域科学シンポジウム横断セッション：[IM] 中層大気・熱圏11月14日（木）〜15日（金） 国立極地研究所 2階大会議室前ラウンジ

Published
2013

62. Effects of atmospheric light scattering on spectroscopic observations of greenhouse gases from space. Part 1: Validation of PPDF-based CO2 retrievals from GOSAT

Author

Oshchepkov, S., Bril, A., Yokota, T., Morino, I., Yoshida, Y., Matsunaga, T., Belikov, D., Wunch, D., Wennberg, P., Toon, G., O’Dell, C., Butz, A., Guerlet, S., Cogan, A., Boesch, H., Eguchi, N., Deutscher, N., Griffith, D., Macatangay, R., Notholt, J., Sussmann, R., Rettinger, M., Sherlock, V., Robinson, J., Kyrö, E., Heikkinen, P., Feist, D., Nagahama, T., Kadygrov, N., Maksyutov, S., Uchino, O., and Watanabe, a.

Abstract

This report describes a validation study of Greenhouse gases Observing Satellite (GOSAT) data processing using ground-based measurements of the Total Carbon Column Observing Network (TCCON) as reference data for column-averaged dry air mole fractions of atmospheric carbon dioxide (X CO2). We applied the photon path length probability density function method to validate X CO2 retrievals from GOSAT data obtained during 22months starting from June 2009. This method permitted direct evaluation of optical path modifications due to atmospheric light scattering that would have a negligible impact on ground-based TCCON measurements but could significantly affect gas retrievals when observing reflected sunlight from space. Our results reveal effects of optical path lengthening over Northern Hemispheric stations, essentially from May-September of each year, and of optical path shortening for sun-glint observations in tropical regions. These effects are supported by seasonal trends in aerosol optical depth derived from an offline threedimensional aerosol transport model and by cirrus optical depth derived from space-based measurements of the Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) instrument. Removal of observations that were highly contaminated by aerosol and cloud from the GOSAT data set resulted in acceptable agreement in the seasonal variability of X CO2 over each station as compared with TCCON measurements. Statistical comparisons between GOSAT and TCCON coincident measurements of CO 2 column abundance show a correlation coefficient of 0.85, standard deviation of 1.80ppm, and a sub-ppm negative bias of -0.43ppm for all TCCON stations. Global distributions of monthly mean retrieved X CO2 with a spatial resolution of 2.5° latitude×2.5° longitude show agreement within∼2.5°ppm with those predicted by the atmospheric tracer transport model.

Published
2013

64. Effects of atmospheric light scattering on spectroscopic observations of greenhouse gases from space. Part 2: Algorithm intercomparison in the GOSAT data processing for CO2 retrievals over TCCON sites

Author

Oshchepkov, S., Bril, A., Yokota, T., Morino, I., Yoshida, Y., Matsunaga, T., Belikov, D., Wunch, D., Wennberg, P., Toon, G., O'Dell, C., Butz, A., Guerlet, S., Cogan, A., Boesch, H., Eguchi, N., Deutscher, N., Griffith, D., Macatangay, R., Notholt, J., Sussmann, R., Rettinger, M., Sherlock, V., Robinson, J., Kyrö, E., Heikkinen, P., Feist, D. G., Nagahama, T., Kadygrov, N., Maksyutov, S., Uchino, O., and Watanabe, H.

Subjects
Earth sciences, ddc:550
Published
2012

68. The magnetic properties of Fe3O4/nonmagnetic metal/Fe hybrid systems.

Author

Omori, K., Kawai, T., Takahashi, N., Yanase, T., Shimada, T., and Nagahama, T.

Subjects
CURIE temperature, MAGNETIC properties of condensed matter, SPINTRONICS, MICROELECTRONICS, EPITAXY
Abstract

Fe3O4 possesses unique properties such as high Curie temperature and half-metallic nature and therefore can function as a high-spin-polarized electrode in spintronic devices. In order to use this compound in such devices, the magnetic characteristics of multilayers used in these devices, which include Fe3O4, should be highly controllable. In this study, we fabricated Fe3O4/Pt or Cr (0-10 nm)/Fe systems through epitaxial growth on MgO(110) substrates in order to investigate the magnetic coupling in Fe3O4 and metallic hybrid systems. We found that these two systems show a marked difference in the dependence of the coercive field (Hc) of the Fe layer on the nonmagnetic-metal-layer thickness. Hc for the system with Pt showed variation characteristics of interlayer exchange coupling in metal systems, while Hc increased monotonically with the thickness of the Cr layer. [ABSTRACT FROM AUTHOR]

Published
2017
Full Text
View/download PDF

78. Aircraft measurements of carbon dioxide and methane for the calibration of ground-based high-resolution Fourier Transform Spectrometers and a comparison to GOSAT data measured over Tsukuba and Moshiri

Author

Tanaka, T., primary, Miyamoto, Y., additional, Morino, I., additional, Machida, T., additional, Nagahama, T., additional, Sawa, Y., additional, Matsueda, H., additional, Wunch, D., additional, Kawakami, S., additional, and Uchino, O., additional

Published
2012
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results