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Quintero Noda, C.,Villanueva, G. L.,Katsukawa, Y.,Solanki, S. K.,Orozco Suá,rez, D.,Ruiz Cobo, B.,Shimizu, T.,Oba, T.,Kubo, M.,Anan, T.,Ichimoto, K.,Suematsu, Y. Springer-Verlag 2018 Astronomy and astrophysics Vol.610 No.-
<P>Of the two solar lines, K I<I>D</I>1 and <I>D</I>2, almost all attention so far has been devoted to the <I>D</I>1 line, as <I>D</I>2 is severely affected by an O2 atmospheric band. This, however, makes the latter appealing for balloon and space observations from above (most of) the Earth’s atmosphere. We estimate the residual effect of the O2 band on the K I<I>D</I>2 line at altitudes typical for stratospheric balloons. Our aim is to study the feasibility of observing the 770 nm window. Specifically, this paper serves as a preparation for the third flight of the Sunrise balloon-borne observatory. The results indicate that the absorption by O2 is still present, albeit much weaker, at the expected balloon altitude. We applied the obtained O2 transmittance to K I<I>D</I>2 synthetic polarimetric spectra and found that in the absence of line-of-sight motions, the residual O2 has a negligible effect on the K I<I>D</I>2 line. On the other hand, for Doppler-shifted K I<I>D</I>2 data, the residual O2 might alter the shape of the Stokes profiles. However, the residual O2 absorption is sufficiently weak at stratospheric levels that it can be divided out if appropriate measurements are made, something that is impossible at ground level. Therefore, for the first time with Sunrise III, we will be able to perform polarimetric observations of the K I<I>D</I>2 line and, consequently, we will have improved access to the thermodynamics and magnetic properties of the upper photosphere from observations of the K I lines.</P>
Lattice Modulation in YMn2O5 and TbMn2O5 Studied by Using Synchrotron Radiation X-rays
Yukio Noda,H Kimura,H Sawa,K Kohn,N Ikeda,S Kobayashi,Y Ishikawa,Y Kamada,Y Wakabayashi 한국물리학회 2007 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.51 No.2I
RMn2O5 (R = Y and rare earth) shows successive magnetic and ferroelectric phase transitions at about 45 K, 40 K, 39 K, 20 K and 10 K and is called a multiferroic compound. We have investigated the lattice modulation vectors (qL) of YMn2O5 and TbMn2O5 by using single crystal Synchrotron Radiation X-ray diraction and compared them with the magnetic propagation vectors (qM) studied by neutron diraction. The relation of the propagation vectors between magnetic materials and dielectrics is found to be qL = 2qM. A preliminary structure analysis of the atomic displacement pattern in the commensurate ferroelectric phase of TbMn2O5 is discussed.fb
Review and Prospect of Ferroelectricity and Magnetism in YMn2O5
Y. Noda,H. Kimura,I. Kagomiya,K. Kohn,N. Ikeda,S. Matumoto,T. Shobu,Y. Fukuda 한국물리학회 2003 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.42 No.IV
YMn2O5 undergoes ferroelectric successive phase transitions at 39 K and 19 K, in which a dielectric constant shows anomalies. Spontaneous polarization was also observed. Just above these ferroelectric phase transition temperatures, at 45 K, antiferromagnetic order occurs. Neutron elastic measurements and magnetic susceptibility measurements reveal that the ferroelectric phase transition at 39 K and 19 K occurs simultaneously with the change of magnetic ordering pattern. Review of experimental results and conjecture for the origin of spontaneous polarization are given.??
Beam Spot Imaging System Using a Fluorescent Screen for Carbon-ion Radiotherapy
K. Mizushima,E. Takeshita,T. Furukawa,Y. Hara,T. Shirai,K. Katagiri,K. Noda 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.63 No.7
A two-dimensional (2D) beam imaging system with a fluorescent intensifying screen and highspeedcharge-coupled device (CCD) camera was developed to observe the fluctuations of the beamposition and size. This system can perform imaging of the beam spot and the calculation of bothits position and size from the obtained image with a cycle-time of 20 ms. For quality assurance ofscanned carbon-ion therapy, we measured the stability of the unscanned-beam position and size byusing this system at the isocenter in a treatment room. We confirmed that the fluctuation rangesof its position and size were less than the tolerance for scanning irradiation.
Relationship of IGF-I mRNA Levels to Tissue Development in Chicken Embryos of Different Strains
Kita, K.,Noda, C.,Miki, K.,Kino, K.,Okumura, J. Asian Australasian Association of Animal Productio 2000 Animal Bioscience Vol.13 No.12
Insulin-like growth factor-I (IGF-I) mRNA levels in the eyes, heart, liver and breast muscle removed from dwarf egg-type, normal egg-type and normal meat-type chicken embryos at 7, 14 and 20 days of incubation were measured. There was no influence of chicken strain on IGF-I gene expression in the eyes and liver. The IGF-I gene expression in eyes increased significantly along with the incubation period. In the liver, IGF-I gene expression at 20 days of incubation was significantly higher than that at 14 days of incubation. In the muscle, the lowest value for IGF-I gene expression was observed in meat-type chicken embryos. Regression analysis revealed that IGF-I gene expression was significantly correlated to the weights of the eyes and liver, but not the muscle. We conclude that there is little influence of strain on tissue IGF-I gene expression in chicken embryos during incubation but that tissue development in chicken embryos is nevertheless at least partly regulated by the change in IGF-I gene expression.
M. Noda,Y. Misaki,K. Tanaka 한국물리학회 2006 Current Applied Physics Vol.6 No.5
Several bis(alkyldithio) derivatives of BDT-TTP (BTCn-TTP), where BDT-TTP is 2,5-bis(1,3-dithiol-2-ylidene)-1,3,4,6-tetrathia-pentalene, have been synthesized. Cyclic voltammograms of new donors consist of four pairs of single-electron transfer waves, andthe rst redox potentials (E1) are higher by 0.040.05 V than that of unsubstituted BDT-TTP. The TaF.6 salt of bis(methylthio)derivative (BTM-TTP) have the so-calledb-type array of the donors. A tight-binding band calculation of (BTM-TTP)2TaF6 sug-gests that this salt has a quasi one-dimensional Fermi surface. The BTM-TTP salts with the PF.6 and TaF.6anions exhibit metallictemperature dependence down to 90 K, while the SbF.6 salt is a semiconductor with the activation energy of 0.13 eV.
Hiroyuki Kimura,K Kohn,K Kakurai,K Kaneko,N Metoki,S Wakimoto,Y Kamada,Y Noda 한국물리학회 2007 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.51 No.2I
A microscopic magnetic phase diagram as functions of temperature and magnetic .eld was mapped for multiferroic compounds of RMn2O5 (R = Er, Ho) by using neutron diraction mea- surements under high magnetic .eld. The unambiguous relation between the ferroelectric phase transition and the magnetic phase transition from a two-dimensional incommensurate to a com- mensurate phase, where both the transitions are concomitantly induced by the magnetic .eld, indicates that the electric polarization is magnetically induced and the commensurate spin state is important for stabilizing the ferroelectricity in the multiferroic RMn2O5 system. The origin of the .eld-induced magnetic phase transition is discussed based on the magnetic structure. j_si