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Watanabe, H.,Zhang, G.X.,Yoshida, K.,Walker, P.M.,Liu, J.J.,Wu, J.,Regan, P.H.,Soderstrom, P.A.,Kanaoka, H.,Korkulu, Z.,Lee, P.S.,Nishimura, S.,Yagi, A.,Ahn, D.S.,Alharbi, T.,Baba, H.,Browne, F.,Bruce North-Holland Pub. Co 2016 Physics letters. Section B Vol.760 No.-
The level structure of <SUP>172</SUP>Dy has been investigated for the first time by means of decay spectroscopy following in-flight fission of a <SUP>238</SUP>U beam. A long-lived isomeric state with T<SUB>½</SUB>=0.71(5) s and K<SUP>π</SUP>=8<SUP>-</SUP> has been identified at 1278 keV, which decays to the ground-state and γ-vibrational bands through hindered electromagnetic transitions, as well as to the daughter nucleus <SUP>172</SUP>Ho via allowed β decays. The robust nature of the K<SUP>π</SUP>=8<SUP>-</SUP> isomer and the ground-state rotational band reveals an axially-symmetric structure for this nucleus. Meanwhile, the γ-vibrational levels have been identified at unusually low excitation energy compared to the neighboring well-deformed nuclei, indicating the significance of the microscopic effect on the non-axial collectivity in this doubly mid-shell region. The underlying mechanism of enhanced γ vibration is discussed in comparison with the deformed Quasiparticle Random-Phase Approximation based on a Skyrme energy-density functional.
Development of Water Assisted Solid State Reaction for the Ceramic Materials
Toda, Kenji,Kim, Sun Woog,Hasegawa, Takuya,Watanabe, Mizuki,Kaneko, Tatsuro,Toda, Ayano,Yamanashi, Ryota,Kumagai, Shota,Muto, Masaru,Itadani, Atsushi,Sato, Mineo,Uematsu, Kazuyoshi,Ishigaki, Tadashi,K Trans Tech Publications, Ltd. 2017 Key Engineering Materials Vol.751 No.-
<P>We report a novel soft chemical synthesis method, water assisted solid state reaction (WASSR) method. This method is very simple and can synthesize many ceramic materials just by storing or mixing raw materials added a small amount of water in a reactor at low temperature below 373 K. For example, well-crystalline SrMoO4 was obtained using the WASSR method.</P>
Hyung-Seop Shin,Dedicatoria, M. J.,Awaji, S.,Watanabe, K. IEEE 2012 IEEE transactions on applied superconductivity Vol.22 No.3
<P>SmBCO and YBCO coated conductors (CC) showed different critical current, I<SUB>c</SUB> degradation behavior with strain showing different I<SUB>c</SUB> peak position under self field. Strain effect on I<SUB>c</SUB> under magnetic field in REBCO CC tapes was investigated in order to measure and to describe its tolerance and degradation behavior. Katagiri-type tensile testing apparatus was adopted in which magnetic field was applied parallel to the c-axis of coating film using 10 T superconducting magnet at 77 K. Both strain gauge and Nyilas double extensometers were used to measure the strain. In all the REBCO CC tapes investigated, I<SUB>c</SUB>(ε, B) strongly depends on magnetic field and their degradation behavior depends on the kind of HTS film and fabrication technique adopted. Differently with YBCO CC tapes, SmBCO CC tapes showed increasing I<SUB>c</SUB> strain sensitivity with increasing magnetic field at 77 K and the irreversible strain limit was magnetic field independent over the entire field range studied.</P>
Phase Diagram and Transport Properties of Y1−xNdxCo2 Pseudo-binary Alloys
A. T. Burkov,M. Takeda,A. Teruya,S. Watanabe,Y. Hiranaka,A. Nakamura,M. Hedo,T. Nakama,K. Yagasaki,Y. Takaesu,K. Uchima,Y. Uwatoko 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.62 No.12
The electrical resistivity and the thermopower S of pseudo-binary Y1−xNdxCo2 alloys have beenmeasured at temperatures from 2 to 300 K under pressures up to 3.5 GPa. NdCo2 is a ferromagnetwith a Curie temperature TC of 98 K. In the ferromagnetic phase, it undergoes a 4f spin-reorientationtransition at TR = 40 K. At this transition, the easy direction of 4f magnetization is changed from[100] at temperatures above TR to [110] below TR. The system phase diagram TC(x, P) and TR(x, P)is inferred from the temperature dependencies of the electrical resistivity and the thermopower. The Curie temperature of the alloys, TC decreases with decreasing Nd concentration x and vanishesaround xc = 0.3. Above xc, the Curie temperature decreases with increasing pressure. The spinreorientationtemperature weakly depends on the composition and on the pressure until it mergeswith TC. There is a large region of the phase diagram, partly overlapping with the ferromagneticphase, where the cobalt 3d electron system is non-uniformly magnetized due to spatial fluctuationsof the 4f-3d exchange field related to a random distribution of Nd 4f magnetic moments over the Rsublattice. In this region, large static 3d magnetic fluctuations govern the electronic transport.
Soft-Switching Buck-Boost Converter with High Power Factor for PAM Inverter System
K.Taniguchi,T.Watanabe,T.Morizane,N.Kimura,Hyun-Woo Lee 전력전자학회 1998 ICPE(ISPE)논문집 Vol.- No.-
A proposed soft-switching buck-boost PWM converter has a lot of advantages, viz., electric isolation, a high power factor, low switching losses, low EMI noise, reduction of the voltage and current stresses, etc. In a new PFC converter, the switching device is replaced by the lossless snubber circuit to achieve the zero voltage switching (ZVS) at the maximum current However, the charging current of the capacitor in the loss-less snubber circuit distorts the input current waveforms. To improve the input current waveform, a new duty factor control method is proposed in this paper.<br/>
Watanabe, K.,Sato, H.,Kobayashi, T.,Katoh, K.,Obara, Y. Asian Australasian Association of Animal Productio 2003 Animal Bioscience Vol.16 No.4
In order to estimate the availability of ruminally-protected Lys (RPLys) and Met (RPMet), quantitative changes of free Lys and Met in the total abomasal outflow and feces were determined in three Holstein heifers with a T-shaped duodenal cannula. RPLys was prepared by coating Lys with fat and RPMet with a pH-sensitive polymer. RPLys and RPMet containing 30 g of each amino acid were supplied together to heifers, and total abomasal outflow was collected hourly from the T-shaped duodenal cannula for a 48 h period. Collected abomasal outflows were fractionated into liquid and solid phases to measure free Lys and Met concentration. At 2 wk after total abomasal outflow sampling, heifers were supplied RPLys and RPMet together again, and total feces were collected every 12 h for a 3 d period t estimate excreted RPLys and RPMet in feces. The amounts of Lys and Met recovered from the liquid fractions of abomasal outflow were estimated to be $23.9{\pm}8.3%$ and $68.6{\pm}3.6%$ (p=0.008) of RPLys and RPMet ingested, respectively. Final intestinal disappearances of Lys and Met were estimated to be $49.5{\pm}2.6%$ and $78.2%{\pm}6.5%$ (p=0.015) of ingested RPLys and RPMet, respectively.