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Seung-Seok Ha,Nam-Hee Kim,Chun-Yeol You,Sukmock Lee,Ohta, K.,Maruyama, T.,Konishi, K.,Nozaki, T.,Suzuki, Y.,Van Roy, W. IEEE 2009 IEEE transactions on magnetics Vol.45 No.6
<P>We investigated the magnetic anisotropy of ultrathin bcc-Fe (001) films with a fcc-Au(001) cover layer, grown onto GaAs (001) (4 times 1) and (2 times 6)/(3 times 6) reconstructed surfaces. The magneto-optical Kerr effect hysteresis loops revealed existence of a strong in-plane uniaxial magnetic anisotropy in the Fe films grown on both the surfaces. Details of the in-plane uniaxial anisotropy (K<SUB>U</SUB>), cubic anisotropy (K<SUB>C</SUB>), and effective demagnetization field (4piM<SUB>eff</SUB>) were studied by Brillouin light scattering method. We observed a stronger reduction of K<SUB>U</SUB>, K<SUB>C</SUB>, and 4piM<SUB>eff</SUB> in thinner Fe layers (below 1.3 nm) grown on both the surfaces. In the case of Fe films grown on GaAs (4 times 1) surface, anisotropies observed were smaller than that for the (2 times 6)/(3 times 6) surface. This reflects the role of surface structure in determining the magnetic anisotropies.</P>
Particle Capture Reaction using Extended Core Plus Valence Nucleon Model
K. Yamamoto,H. Masui,M. Ohta,K. Kato 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.23
We investigate the ^(17)O(n,γ)^(18)O capture reaction cross section at the astrophysical energy using a microscopic ^(16)O+n+n model. The data of this reaction cross section for the s-process nucleosynthesis becomes important. The ^(17)O(n,γ)^(18)O reaction cross section is not measured by the experiment, because the natural abundance of <sup>17</sup>O is the 0.038%. We consider that it is necessary to estimate the ^(17)O(n,γ)^(18)O reaction cross section by a theoretical approach. In this paper, we apply the available wave function obtained by the microscopic ^(16)O+n+n model to the estimation of the ^(17)O(n,γ)^(18)O reaction cross section.
Tumor Imaging by Monoclonal Antibodies Labeled with Radioactive Metal Ions
( K. Endo ),( H. Sakahara ),( T. Nakashima ),( M. Koizumi ),( M. Kunimastsu ),( H. Ohta ),( T. Furukawa ),( Y. Ohmomo ),( Y. Arano ),( A. Yokoyama ),( K. Okada ),( O. Yoshida ),( S. Hosoi ),( T’ Nakam 대한핵의학회 1984 핵의학 분자영상 Vol.18 No.2
Measurements of Neutron-Capture Cross Sections of Palladium Isotopes at the J-PARC/MLF/ANNRI
S. Nakamura,K. Furutaka,S. Goko,H. Harada,A. Kimura,T. Kin,F. Kitatani,M. Koizumi,M. Ohta,M. Oshima,Y. Toh,J. Hori,T. Fujii,S. Fukutani,K. Takamiya,M. Igashira,T. Katabuchi,M. Mizumoto,T. Kamiyama,K. 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.23
The operation of a new experimental apparatus called ``Accurate Neutron-Nucleus Reaction measurement Instrument (ANNRI)''in the Material and Life science experimental Facility (MLF) at the Japan Proton Accelerator Research Complex (J-PARC) has been started for neutroncapture crosssection measurements of minor actinides and long-lived fission products. As a part of the measurements, we have measured the time-of-flight spectra of palladium-105, 106, 107 and 108 with a ``4π Ge spectrometer'' installed at the ANNRI. We obtained preliminary results of the cross sections for palladium-107 and 105 in neutron energies ranging from 0.1 eV to 300 eV.
Ergonomic evaluation of stereoscopic contents for a museum exhibition
N. Abe,K. Ohta,T. Kawai,K. Ando,T. Kakinuma,K. Fujita,N. Kudo 한국정보디스플레이학회 2011 Journal of information display Vol.12 No.3
This research entailed the production of stereoscopic 3D (S3D) contents using 2D-to-S3D conversion for exhibition at a museum and subjective evaluation. Hybrid production combining S3D images of existing live-action videos using the 2Dto-S3D conversion technology and computer graphic ones created via stereo rendering was conducted. Design and control of the chronological analysis of the parallactic angle was conducted on the produced contents, using binocular information as well as subjective evaluations, with the intent of conducting an investigation on the characteristics of such contents from the perspectives of the producers and viewers. An investigation was also conducted on the effects of the viewing position on the impressions of the S3D images.
Ergonomic evaluation of stereoscopic contents for a museum exhibition
Abe, N.,Ohta, K.,Kawai, T.,Ando, K.,Kakinuma, T.,Fujita, K.,Kudo, N. The Korean Infomation Display Society 2011 Journal of information display Vol.12 No.3
This research entailed the production of stereoscopic 3D (S3D) contents using 2D-to-S3D conversion for exhibition at a museum and subjective evaluation. Hybrid production combining S3D images of existing live-action videos using the 2D-to-S3D conversion technology and computer graphic ones created via stereo rendering was conducted. Design and control of the chronological analysis of the parallactic angle was conducted on the produced contents, using binocular information as well as subjective evaluations, with the intent of conducting an investigation on the characteristics of such contents from the perspectives of the producers and viewers. An investigation was also conducted on the effects of the viewing position on the impressions of the S3D images.
Measurements of Neutron-Capture Cross Sections of ^(244)Cm and ^(246)Cm at J-PARC/MLF/ANNRI
A. Kimura,K. Furutaka,S. Goko,H. Harada,T. Kin,F. Kitatani,M. Koizumi,S. Nakamura,M. Ohta,M. Oshima,Y. Toh,T. Fujii,S. Fukutani,J. Hori,K. Takamiya,M. Igashira,T. Katabuchi,M. Mizumoto,T. Kamiyama,K. 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.23
For developments of innovative nuclear reactors, strong demands exist for the improvement of the accuracy of the neutroncapture cross sections of minor actinides (MAs) and long-lived fission products. We have constructed a Ge-spectrometer using the Accurate Neutron-Nucleus Reaction measurement Instrument (ANNRI) in the J-PARC materials and life science experimental facility (MLF). Preliminary neutroncapture cross sections of ^(244)Cm and ^(246)Cm were obtained in the neutron energy range from 1.0 eV up to 300 eV.
Mesonic and nonmesonic weak decay widths of medium-heavy <tex> $ \Lambda $</tex> hypernuclei
Sato, Y.,Ajimura, S.,Aoki, K.,Bhang, H.,Hasegawa, T.,Hashimoto, O.,Hotchi, H.,Kim, Y. D.,Kishimoto, T.,Maeda, K.,Noumi, H.,Ohta, Y.,Omata, K.,Outa, H.,Park, H.,Sekimoto, M.,Shibata, T.,Takahashi, T.,Y American Physical Society 2005 PHYSICAL REVIEW C - Vol.71 No.2
고추種字의 低溫發芽性에 關한 硏究 Ⅱ. 果実의 登熟 및 貯藏이 種子의 低溫發芽性에 미치는 影響
K.S. Choi(崔寬淳),Y.H. Om(嚴禜,鉉),C.J. Yu(兪昶在),Y.Ohta(太田保夫) 한국육종학회 1982 한국육종학회지 Vol.14 No.1
The effects of maturity and after-ripening of pepper seeds on germinability at low temperature (10℃) and also the effects of storage duration and condition of seeds were studied. 8 pepper varieties were used in the study, which produce typical germinability at low temperature. There was varietal differences in percentage of seed filling as influenced by days after flowering. In the protein content, “Saegochu” showed the peak about 40 days after flowering. and “Mexico” and “Texans” it about 50 days. At low temperature germination of pepper seeds decreased remarkably at the immature stage, and varietal. differences were recognized as nonsignificant, but it as significant at about 45 days after flowering. The varieties with high and low germinabilities at low temperature produced some germination about 35 and 50 days after flowering, respectively. The former increased sharply in germination coefficient around 60% seed weight of fully developed seed, but the latter remained unchangeable. There was significant simple correlation between germination coefficient, dry weight of 1000 seeds, days after flowering and protein content. In partial correlation, germination coefficient and days after flowering were correlated indicating that similar correlation would be found in the different dry weight of 1000 seeds, but germination coefficient and dry weight of 1000 seeds were not correlated suggesting that they are not correlated within a few same days group after flowering. Days to after-ripening showed significantly positive correlation with germination coefficient as days after flowering shortened. But pepper seeds, which was harvested about 35 or 40 days after flowering and after-ripened for 10 days, has the better germinability at low temperature. The difference in the germinability of pepper seeds stored between low and room temperatures may be attributed to temperature rather than humidity. The germination was highest at normal harvest, so pepper seeds can be considered as nondormant. Varietal differences in the germination at low temperature could be detected within 6 months in the case of storage under room temperature, and within 18 months in the case of desiccator storage under room temperature.