Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
-nonyl N,N-dimethylammonio)-propyl sulfate, present in isotropic solutions above its upper critical solution temperatureTanji, Tamao*; Kusunoki, Yuto*; Nakagawa, Taichi; Takase, Tsugiko*; Ueda, Yuki; Motokawa, Ryuhei; Hinze, W. L.*; Takagai, Yoshitaka*
Langmuir, 41(21), p.13184 - 13191, 2025/06
Times Cited Count：0 Percentile：0.00(Chemistry, Multidisciplinary)Watanabe, Kenichi*; Sugai, Yusuke*; Hasegawa, Sota*; Tanaka, Seishiro*; Hitomi, Keitaro*; Nogami, Mitsuhiro*; Shinohara, Takenao; Su, Y. H.; Parker, J. D.*; Kockelmann, W.*
Scientific Reports (Internet), 14, p.25224_1 - 25224_13, 2024/10
Times Cited Count：0 Percentile：0.00(Multidisciplinary Sciences)Watanabe, Kenichi*; Sugai, Yusuke*; Hasegawa, Sota*; Hitomi, Keitaro*; Nogami, Mitsuhiro*; Shinohara, Takenao; Su, Y. H.; Parker, J. D.*; Kockelmann, W.*
Sensors and Materials, 36(1), p.149 - 154, 2024/01
Times Cited Count：2 Percentile：36.42(Instruments & Instrumentation)Nakagawa, Taichi; Suzuki, Reika*; Matsueda, Makoto; Terashima, Motoki; Hinze, W. L.*; Takagai, Yoshitaka*
Solvent Extraction Research and Development, Japan, 31(2), p.49 - 56, 2024/00
Motokawa, Ryuhei; Kaneko, Koji; Oba, Yojiro; Nagai, Takayuki; Okamoto, Yoshihiro; Kobayashi, Taishi*; Kumada, Takayuki; Heller, W. T.*
Journal of Non-Crystalline Solids, 578, p.121352_1 - 121352_7, 2022/02
Times Cited Count：5 Percentile：29.85(Materials Science, Ceramics)Kobayashi, Hideki*; Nagai, Shin*; Kim, Y.*; Yan, W.*; Ikeda, Kyoko*; Ikawa, Hiroki*; Nagano, Hirohiko; Suzuki, Rikie*
Remote Sensing, 10(7), p.1071_1 - 1071_19, 2018/07
Times Cited Count：16 Percentile：49.13(Environmental Sciences)Plant phenology timings, such as spring green-up and autumn senescence, are essential state information characterizing biological responses and terrestrial carbon cycles. Current efforts for the in situ reflectance measurements are not enough to obtain the exact interpretation of how seasonal spectral signature responds to phenological stages in boreal evergreen needleleaf forests. This study shows the first in situ continuous measurements of canopy scale (overstory + understory) and understory spectral reflectance and vegetation index in an open boreal forest in interior Alaska. Two visible and near infrared spectroradiometer systems were installed at the top of the observation tower and the forest understory, and spectral reflectance measurements were performed in 10 min intervals from early spring to late autumn. We found that canopy scale normalized difference vegetation index (NDVI) varied with the solar zenith angle. On the other hand, NDVI of understory plants was less sensitive to the solar zenith angle. Due to the influence of the solar geometry, the annual maximum canopy NDVI observed in the morning satellite overpass time (10-11 am) shifted to the spring direction compared with the standardized NDVI by the fixed solar zenith angle range (60-70 degree). We also found that the in situ NDVI time-series had a month-long high NDVI plateau in autumn, which was completely out of photosynthetically active periods when compared with eddy covariance net ecosystem exchange measurements. The result suggests that the onset of an autumn high NDVI plateau is likely to be the end of the growing season. In this way, our spectral measurements can serve as baseline information for the development and validation of satellite-based phenology algorithms in the northern high latitudes.
Ino, Kohei*; Hernsdorf, A. W.*; Konno, Yuta*; Kozuka, Mariko*; Yanagawa, Katsunori*; Kato, Shingo*; Sunamura, Michinari*; Hirota, Akinari*; Togo, Yoko*; Ito, Kazumasa*; et al.
ISME Journal, 12(1), p.31 - 47, 2018/01
Times Cited Count：55 Percentile：89.28(Ecology)In this study, we found the dominance ofanaerobic methane-oxidizing archaea in groundwater enriched in sulfate and methane from a 300-m deep underground borehole in granitic rock.
Sadowski, J. W.*; Tanaka, Kaori*; Nagai, Yuki
Canadian Journal of Physics, 91(6), p.487 - 489, 2013/06
Times Cited Count：2 Percentile：18.84(Physics, Multidisciplinary)We examine the effects of band structure and electron-phonon interactions on charge density waves (CDW) in terms of the extended attractive Hubbard model at half filling. It is shown that van Hove singularities well below the Fermi surface can lead to a substantial energy gain by electron-phonon coupling and result in the formation of CDW.
Matsumura, Hiroshi*; Kinoshita, Norikazu*; Iwase, Hiroshi*; Toyoda, Akihiro*; Kasugai, Yoshimi; Matsuda, Norihiro; Sakamoto, Yukio; Nakashima, Hiroshi; Yashima, Hiroshi*; Mokhov, N.*; et al.
Journal of the Korean Physical Society, 59(2), p.2059 - 2062, 2011/08
Times Cited Count：1 Percentile：10.76(Physics, Multidisciplinary)In an antiproton production (Pbar) target station of the Fermi National Accelerator Laboratory (FNAL), the secondary particles produced by bombarding a target with 120-GeV protons are shielded by a thick iron shield. In order to obtain experimental data on high-energy proton accelerator facilities, we indirectly measured 
100-MeV neutrons at the outside of the iron shield. The measurement was performed by using the Au activation method coupled with a low-background 
-ray counting system. As an indicator for the neutron flux, we determined the production rates of 8 spallation nuclides (
Au, 
Pt, 
Ir, 
Os, 
Hf, 
Lu, 
Lu, and 
Yb) in the Au activation detector. The measured production rates were compared with the theoretical production rates calculated using PHITS. We proved that the Au activation method can serve as a powerful tool for indirect measurements of 100-MeV neutrons that play a vital role in neutron transport.
Callis, R. W.*; Doane, J. L.*; Grunloh, H. J.*; Kajiwara, Ken; Kasugai, Atsushi; Moeller, C. P.*; Oda, Yasuhisa; Olstad, R. A.*; Sakamoto, Keishi; Takahashi, Koji
Fusion Engineering and Design, 84(2-6), p.526 - 529, 2009/06
Times Cited Count：14 Percentile：64.82(Nuclear Science & Technology)Nishiyama, Yutaka; Onizawa, Kunio; Suzuki, Masahide; Anderegg, J. W.*; Nagai, Yasuyoshi*; Toyama, Takeshi*; Hasegawa, Masayuki*; Kameda, Jun*
Acta Materialia, 56(16), p.4510 - 4521, 2008/09
Times Cited Count：76 Percentile：92.88(Materials Science, Multidisciplinary)The effects of intergranular P segregation and hardening on the ductile-to-brittle transition temperature (DBTT) in several neutron-irradiated reactor pressure vessel steels with different bulk contents of P and Cu have been investigated using a scanning Auger microbe, a local electrode atom probe and positron annihilation spectroscopy. Increasing the neutron fluence at 563 K promotes intergranular P segregation. The content of P more significantly affects irradiation hardening than that of Cu due to distinct formation of P-rich precipitates arising from the stabilization of vacancies. Analyzing the correlations between the P segregation, hardening, fraction of intergranular fracture and DBTT, it is found neutron irradiation mitigates an embrittling effect of segregated P, and therefore the hardening more strongly affects the DBTT shift than the P segregation.
Katata, Genki; Nagai, Haruyasu; Wrzesinsky, T.*; Klemm, O.*; Eugster, W.*; Burkard, R.*
Journal of Applied Meteorology and Climatology, 47(8), p.2129 - 2146, 2008/08
Times Cited Count：31 Percentile：56.69(Meteorology & Atmospheric Sciences)A land surface model including cloud water deposition to vegetation was developed to better predict water exchanges between biosphere and atmosphere. High performance of our new model was confirmed and it provided a better prediction of measured cloud water flux than the commonly used model. Simple linear relationships between wind speed and deposition velocity (
) were found. Numerical experiments were performed to study the influences of leaf shapes (needle and broad leaves) and canopy structure (Leaf area index (LAI) and canopy height) on . Broad leaves with small sized leaves can capture larger amounts of cloud water than needle leaves. From the analyses of conductances at given Leaf Area Density (LAD), we found that trees whose LAD 
0.1 m
m
are the most efficient structures for cloud water deposition. A simple expression for the slope of against LAD obtained from the experiments can be useful to predict cloud water deposition.
Suzuki, Masayuki; Daido, Hiroyuki; Choi, I. W.*; Yu, W.*; Nagai, Keiji*; Norimatsu, Takayoshi*; Mima, Kunioki*; Fiedorowicz, H.*
Physics of Plasmas, 10(1), p.227 - 233, 2003/01
Times Cited Count：20 Percentile：53.28(Physics, Fluids & Plasmas)no abstracts in English
Suzuki, Masayuki; Yamagami, Susumu; Nagai, Keiji*; Norimatsu, Takayoshi*; Mima, Kunioki*; Murakami, Yoichi*; Nakayama, Takeyoshi*; Yu, W.*; Fiedorowicz, H.*; Choi, I. W.*; et al.
Proceedings of 2nd International Conference on Inertial Fusion Sciences and Applications (IFSA 2001), p.1252 - 1255, 2001/00
no abstracts in English
Raskob, W.*; Trybushnyi, D.*; Nagai, Haruyasu; Terada, Hiroaki; Kadowaki, Masanao; Tsuzuki, Katsunori; Namba, Kenji*; Zheleznyak, M.*; Kutuzova, T.*; Bizhko, N.*; et al.
no journal, ,
Katata, Genki; Nagai, Haruyasu; Wrzesinsky, T.*; Klemm, O.*; Eugster, W.*; Reto, B.*
no journal, ,
Several experiments focusing on cloud (fog) water deposition on the land surface suggest that cloud water plays an important role in water resource in arid and semi-arid areas. A one-dimensional vegetation model including the process of cloud water deposition on vegetation has been developed to better predict cloud water deposition on the vegetation. High performance of the model was confirmed by comparisons of calculated surface heat and cloud water fluxes over the forest with measurements acquired at the Norway spruce forest in the Waldstein, Germany. Numerical experiments to examine the dependence of cloud water deposition on the vegetation species and structures are performed using the presented model. The results showed that the differences of leaf shape and size have a large impact on cloud water deposition and cloud water deposition varies with the growth of vegetation and seasonal change of Leaf Area Index (LAI).
Matsumura, Hiroshi*; Kasugai, Yoshimi; Yashima, Hiroshi*; Iwase, Hiroshi*; Matsuda, Norihiro; Kinoshita, Norikazu*; Sanami, Toshiya*; Hagiwara, Masayuki*; Shigyo, Nobuhiro*; Arakawa, Hiroyuki*; et al.
no journal, ,
A gold activation detector was studied as a high energy neutron detector at high radiation field in a series of shielding experiment at Fermi National Accelerator Laboratory. We could measure spallation residual nuclei with wide threshold energy by using a combination method with radiological chemical separation and X-X- coincidence detection methods. It was shown the detector was effective for high energy neutron detector.
