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Strongly correlated electrons on frustrated lattices
Tsunetsugu, H,Hattori, K,Ohashi, T,Kawakami, N,Momoi, T Institute of Physics 2009 Journal of physics. Conference series Vol.145 No.1
<P>We review our two recent theoretical works on strongly correlated electrons on typical frustrated lattices. The first topic is about a Mott transition in the single-band Hubbard model on anisotropic triangular lattice, and we discuss a reentrant behaviour of metal-insulator transition, consistent with that in a κ-type BEDT-TTF salt. The second topic is about heavy fermion behaviour in the vanadium spinel LiV<SUB>2</SUB>O<SUB>4</SUB>. We study the 3-orbital t<SUB>2<I>g</I></SUB> Hubbard model on the pyrochlore lattice at quarter filling and derive its low-energy effective model. The correlations of spin and orbital degrees of freedom are discussed.</P>
Muramatsu, T.,Tsutsumi, K.,Hatano, T.,Hattori, M.,Okumura, J. Asian Australasian Association of Animal Productio 1993 Animal Bioscience Vol.6 No.3
The objectives of the present study were to investigate whether or not dietary lysine addition could improve N balance of female Japanese Saanen goats at 15 to 32 months of age, weighing 31 to 40 kg, fed on a wheat bran-hay cube diet supplemented with methionine, and whether or not ruminally protected lysine supplementation could give as good an N balance performance as lysine in the presence of ruminally protected methionine when given orally to the goats. It was considered from changes in N balance and N utilization that the first-and second-limiting amino acids in the diet were methionine and lysine respectively, under the present experimental conditions. The ruminally protected lysine in addition to the ruminally protected methionine gave no improvement in N balance and N utilization compared with the ruminally protected methionine alone, suggesting that the ruminally protected lysine used in the present study was not effectively utilized by the goats.
Characteristic Analysis of Integrated Magnetic Component for Forward Converter
T. Shiraishi,F. Hattori,M. Ishitobi,E. Hiraki 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5
A power converter is required to be compact, lightweight and low loss, and the various approaches have thus been carried out so far. For a forward converters (FC) used for step-down of medium-capacity, many papers that aims at its miniaturization by coupling the isolation transformers and the output reactors have been reported. Each method of the integrated magnetic components (IMC) shows that the position of the windings and the gaps are different and the total volume becomes smaller than that before coupling. However, it is not clear which method should be adopted to obtain the desired performance and what kind of characteristics it can judge from. Therefore, we classified the FC’s IMC from the way of the coupling and investigate the operation of the FC depending on the winding of the IMC in this paper. As results from simulation and experimental analysis, the winding position suitable for the FC, the way of reducing the volume of the magnetic component and suppressing the ripple of the input/output current became clear.
MAGNETIC PROPERTIES OF REPb₂(RE : LIGHT RARE - EARTH ELEMENT) COMPOUNDS
Y. Hattori,R. Sugioka,K. Fukamichi,K. Suzuki,T. Goto 한국자기학회 1995 韓國磁氣學會誌 Vol.5 No.5
Systematic studies on the crystal structure and magnetic properties of light rare earth element(RE) compounds with Pb, REPb₂, have been carried out. Their crystal structure has been identified to be a MoSi₂type. The values of the effective magnetic moment for CePb₂ PrPb₂ and NdPb₂ are respectively very close to the theoretical values of RE³+. These three compounds are antiferromagnetic and exhibit a metamagnetic transition. The magnitude of the Neel temperature is proportional to two-thirds of the de Gennes factor. The magnetic entropy change for NdPb₂ is contrast to the value for CePb₂ heavy-fermion compound, comparable to the theoretical value. The magnetic contribution to the temperature dependence of resistivity for PrPb₂ is given by a form of -lnT in a wide temperature range, implying the Kondo system in analogy with CePb₂.
Inoue, Y.,Kuramoto, Y.,Hattori, M.,Adachi, M.,Kimura, M.,Akahane, T. The Korean Infomation Display Society 2011 Journal of information display Vol.12 No.3
Alignment failure sometimes occurs during the rubbing process because the rubbing cloth comes in direct contacts with the surface of the alignment film. A number of researches observed and evaluated the surface of the alignment film after the rubbing process had been reported. The real-time rubbing process has not been observed directly yet, though. In this study, the movement of the piles of the rubbing cloth during the rubbing process was observed with a high-speed camera. Furthermore, the relationship between the rubbing scratch on the alignment films and the movement of the pile was investigated. It was found that the movement of the pile affected the rubbing scratches.
In Vivo Transfer of Foreign DNA into Primordial Germ Cells (PGCs) of Chicken Embryos
Eguma, K.,Soh, T.,Hattori, M.,Fujihara, N. Asian Australasian Association of Animal Productio 1999 Animal Bioscience Vol.12 No.4
The present experiments were designed to examine whether exogenous DNA injected into the germinal crescent region (GCR) of early stage of developing embryos, which is considered to be the main place from which PGCs originate, can be transferred to recipient chicken embryos. In this experiment, Miw Z (DNA) dissolved in the transfection reagent (TR: Boehringer, Germany) was introduced into the GCR of donor embryos at stage 3-5 or 9-11, followed by continued incubation until the stage 13-15 of embryonic development. The PGCs collected from the embryonic blood vessels were examined for the incorporation of the injected DNA into the PGCs by the methods of X-gal staining and PCR analysis. As the results, the foreign DNA was successfully incorporated into the PGCS, leading to their transfer to the gonadal tissues. The present results, therefore, suggest that the early stage (3-5 or 9-11) of chicken embryonic development would be more successful than stage 13-15 in transferring exogenous genes to the recipient embryos, leading to the possibility of producing transgenic chicken medianting the PGCS.