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MICROSTRUCTURE AND NOISE CHARACTERISTICS IN Co - Cr BASED ALLOY THIN FILM MAGNETIC RECORDING MEDIA
Y. Koshimoto,S. Hirono,T. Ohkubo,S. Umemura,Y. Maeda 한국자기학회 1995 韓國磁氣學會誌 Vol.5 No.5
Reducing media noise is a key to realizing high areal recording density. However, perpendicularly oriented Co-Cr films, strong candidates for high density recording media, have received little attention in terms of recording noise. We studied the noise characteristics of Co-Cr based alloy films by varying the compositionally separated structure.<br/> Co-Cr films with fine compositionally separated microstructure were observed to have low noise, which recording density dependence were negative or week. Studies on control of the microstructure and magnetic properties in combination with noise analysis are important to realize high density recording media.
PROTEIN POLYMORPHISMS IN NATIVE AND RED JUNGLE FOWLS IN NEPAL
Maeda, Y.,Yamamoto, Y.,Nishida, T.,Hashiguchi, T.,Okada, I.,Rajubhandary, H.B. Asian Australasian Association of Animal Productio 1992 Animal Bioscience Vol.5 No.4
Protein polymorphism of native and red jungle fowls in Nepal was analyzed by electrophoresis. Blood samples were collected in the areas of Solu, Jomson road, Kathmandou, Pokhara and Low land. Out of 17 loci, polymorphism were found at nine loci in native fowls and at three loci in red jungle fowls. The proportion of polymorphic loci ($P_{poly}$) of native and red jungle fowls were $0.529{\pm}0.121$ and $0.176{\pm}0.095$, respectively. The five fowl populations in Nepal formed a different cluster from Sri Lankan and Bangladeshi fowl populations. When the gene frequencies of polymorphic loci were compared between the native fowl populations of Sri Lanka, Bangladesh and Nepal, $Amy-1^A$, $Es-1^A$ and $Akp-2^A$ genes showed inclination of south to north.
Yanagisawa, Y.,Suetomi, Y.,Piao, R.,Yamagishi, K.,Takao, T.,Hamada, M.,Saito, K.,Ohki, K.,Yamaguchi, T.,Nagaishi, T.,Kitaguchi, H.,Ueda, H.,Shimoyama, J.,Ishii, Y.,Tomita, M.,Maeda, H. The Korea Institute of Applied Superconductivity a 2018 초전도와 저온공학 Vol.20 No.2
The present article briefly overviews the plan for a new project on joint technology for HTS wires/cables and describes the development plan for the world's highest field NMR magnet, which is a major development item in the project. For full-fledged social implementation of superconducting devices, high temperature superconducting (HTS) wire is a key technology since they can be cooled by liquid nitrogen and they can generate a super-high magnetic field of >>24 T at liquid helium temperatures. However, one of the major drawbacks of the HTS wires is their availability only in short lengths of a single piece of wire. This necessitates a number of joints being installed in superconducting devices, resulting in a difficult manufacturing process and a large joint resistance. In Japan, a large-scale project has commenced, including two technical demonstration items: (i) Development of superconducting joints between HTS wires, which are used in the world's highest field 1.3 GHz (30.5 T) NMR magnet in persistent current mode; the joints performance is evaluated based on NMR spectra for proteins. (ii) Development of ultra-low resistive joints between DC superconducting feeder cables for railway systems. The project starts a new initiative of next generation super-high field NMR development as well as that of realization of better superconducting power cables.
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
Oscillatory Reaction in a Liquid-Liquid System with Nano-Particle Under Microwave Irradiation
Asakuma, Y.,Takahashi, S.,Saptoro, A.,Maeda, Y.,Araki, N. Korean Association for Particle and Aerosol Resear 2015 Particle and Aerosol Research Vol.11 No.3
A Belousov-Zhabotinsky reaction in a liquid-liquid system under microwave radiation was observed under non-stirring conditions. To control this non-equilibrium reaction, nano-particle, which is active under microwave irradiation, was added to the solution. Color changes of the solution during the oscillatory reaction were found to be influenced by the irradiation power although the droplet temperature was equal to the temperature of surrounding oil. During the irradiation, the period of oscillation became shorter because the reaction rate was faster. It could also be observed that there is possibility to eliminate oscillatory behaviors of the reaction using higher power of microwave. The possibility of controlling non-linear reaction using microwave was shown since microwave can easily travel through oil phase and reach water phase.
DISCOVERY OF AN UNIDENTIFIED <i>FERMI</i> OBJECT AS A BLACK WIDOW-LIKE MILLISECOND PULSAR
Kong, A. K. H.,Huang, R. H. H.,Cheng, K. S.,Takata, J.,Yatsu, Y.,Cheung, C. C.,Donato, D.,Lin, L. C. C.,Kataoka, J.,Takahashi, Y.,Maeda, K.,Hui, C. Y.,Tam, P. H. T. IOP Publishing 2012 ASTROPHYSICAL JOURNAL LETTERS - Vol.747 No.1
<P>The Fermi gamma-ray Space Telescope has revolutionized our knowledge of the gamma-ray pulsar population, leading to the discovery of almost 100 gamma-ray pulsars and dozens of gamma-ray millisecond pulsars (MSPs). Although the outer-gap model predicts different sites of emission for the radio and gamma-ray pulsars, until now all of the known gamma-ray MSPs have been visible in the radio. Here we report the discovery of a 'radio-quiet' gamma-ray-emitting MSP candidate by using Fermi, Chandra, Swift, and optical observations. The X-ray and gamma-ray properties of the source are consistent with known gamma-ray pulsars. We also found a 4.63 hr orbital period in optical and X-ray data. We suggest that the source is a black widow-like MSP with a similar to 0.1 M-circle dot late-type companion star. Based on the profile of the optical and X-ray light curves, the companion star is believed to be heated by the pulsar while the X-ray emissions originate from pulsar magnetosphere and/or from intrabinary shock. No radio detection of the source has been reported yet, and although no gamma-ray/radio pulsation has been found we estimate that the spin period of the MSP is similar to 3-5 ms based on the inferred gamma-ray luminosity.</P>