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SUPER LOW SPEED CONTROL FOR LIM
Y.Ogino,K.Abe,K.Ohishi,M.Nakaoka,H.Fukuda,Y.Takakado,K.Nakano,Y.Murakami 전력전자학회 1992 ICPE(ISPE)논문집 Vol.1992 No.4
This paper proposes the super low speed control method for LIM (Linear Induction Motor). The feasibly-proposed control method is based on the vector-control strategy using the current controlled VVVF inverter. Using this control implementation, both the quick speed response and the smooth thrust characteristics are realized in the super low speed range. The experimental results provide its desired operating characteristics in this system.<br/>
TT Virus Infection Among Blood Donors and Patients with non-B, Non-C Liver Diseases in Korea
T, Nakano,Park, Young-Min,Mizokami,Choi, Jong-Young,E, Orito,T, Ohno,T, Kato,Y, Kondo,Y, Tanaka,H, Kato,T, Kato,Kim, Boo-Sung 가톨릭대학교 2000 Bulletin of The Catholic Research Institutes of Me Vol.28 No.-
Background/Aims : A novel virus, designated the TT virus (TTV), was isolated from the serum of a patient with posttransfusion hepatitis of unknown etiology, in Japan. Subsequently, TTV was suggested to be a causative agent in a proportion of cases with cryptogenic hepatitis in Japan. This study aimed to elucidate the significance of TTV infection in cases with cryptogenic liver disease in Korea, a neighbor of Japan. Methods : The prevalence of TTV infection was studied in 120 patients with liver diseases, including 85 patients diagnosed as having non-B, non-C liver diseases. As controls, 220 blood donors were also examined. TTV DNA was detected by polymerase chain reaction, and the sequence was analyzed by phylogenetic analysis. Results : Fourteen (14.0%) of 100 accepted blood donors, 23 (19.2%) of 120 rejected blood donors, and 15 (17.6%) of 85 patients with non-B, non-C liver diseases were positive for TTV DNA. The prevalences of TTV infection among these groups were not significantly different. Phylogenetic analysis suggested the existence of four major genotypes of TTV The proportions of each genotype among patients with non-B, non-C liver diseases were not different from those among accepted blood donors. Conclusions : TTV exists in Korea, but the prevalence among patients with non-B, non-C liver diseases was almost the same as that among blood donors. TTV may not be the main causative agent of cryptogenic liver disease in Korea. The relationship between non-B, non-C liver diseases and TTV genotype remains unclear, although TTV can be classified into four genotypes. (The Journal of Hepatology 30(3):389-93, 1999)
Yamaguchi, Y.,Nakano, M.,Nagao, H.,Okumura, M.,Yamanaka, S.,Kawakami, T.,Yamaki, D.,Nishino, M.,Shigeta, Y.,Kitagawa, Y.,Takano, Y.,Takahata, M.,Takeda, R. Korean Chemical Society 2003 Bulletin of the Korean Chemical Society Vol.24 No.6
A unified picture for magnetism, superconductivity, quantum optics and other properties of molecule-based materials has been presented on the basis of effective model Hamiltonians, where necessary parameter values have been determined by the first principle calculations of cluster models and/or band models. These properties of the matetials are qualitatively discussed on the basis of the spin and pseudo-spin Hamiltonian models, where several quantum operators are expressed by spin variables under the two level approximation. As an example, ab initio broken-symmetry DFT calculations are performed for cyclic magnetic ring constructed of 34 hydrogen atoms in order to obtain effective exchange integrals in the spin Hamiltonian model. The natural orbital analysis of the DFT solution was performed to obtain symmetry-adapted molecular orbitals and their occupation numbers. Several chemical indices such as information entropy and unpaired electron density were calculated on the basis of the occupation numbers to elucidate the spin and pair correlations, and bonding characteristic (kinetic correlation) of this mesoscopic magnetic ring. Both classical and quantum effects for spin alignments and singlet spin-pair formations are discussed on the basis of the true spin Hamiltonian model in detail. Quantum effects are also discussed in the case of superconductivity, atom optics and quantum optics based on the pseudo spin Hamiltonian models. The coherent and squeezed states of spins, atoms and quantum field are discussed to obtain a unified picture for correlation, coherence and decoherence in future materials. Implications of theoretical results are examined in relation to recent experiments on molecule-based materials and molecular design of future molecular soft materials in the intersection area between molecular and biomolecular materials.
Interference Effect betweenϕandΛ(1520)Production Channels in theγp→K+K−pReaction near Threshold
Ryu, S. Y.,Ahn, J. K.,Nakano, T.,Ahn, D. S.,Ajimura, S.,Akimune, H.,Asano, Y.,Chang, W. C.,Chen, J. Y.,Daté,, S.,Ejiri, H.,Fujimura, H.,Fujiwara, M.,Fukui, S.,Hasegawa, S.,Hicks, K.,Horie, K.,Ho American Physical Society 2016 Physical Review Letters Vol.116 No.23
<P>The phi-Lambda(1520) interference effect in the gamma p -> K(+)K(-)p reaction has been measured for the first time in the energy range from 1.673 to 2.173 GeV. The relative phases between phi and Lambda(1520) production amplitudes were obtained in the kinematic region where the two resonances overlap. The measurement results support strong constructive interference when K+K- pairs are observed at forward angles but destructive interference for proton emission at forward angles. Furthermore, the observed interference effect does not account for the root s = 2.1 GeV bump structure in forward differential cross sections for phi photoproduction. This fact suggests possible exotic structures such as a hidden-strangeness pentaquark state, a new Pomeron exchange, or rescattering processes via other hyperon states.</P>
Test of Lorentz invariance with atmospheric neutrinos
Abe, K.,Haga, Y.,Hayato, Y.,Ikeda, M.,Iyogi, K.,Kameda, J.,Kishimoto, Y.,Miura, M.,Moriyama, S.,Nakahata, M.,Nakano, Y.,Nakayama, S.,Sekiya, H.,Shiozawa, M.,Suzuki, Y.,Takeda, A.,Tanaka, H.,Tomura, T. American Physical Society 2015 PHYSICAL REVIEW D - Vol.91 No.5
Limits on sterile neutrino mixing using atmospheric neutrinos in Super-Kamiokande
Abe, K.,Haga, Y.,Hayato, Y.,Ikeda, M.,Iyogi, K.,Kameda, J.,Kishimoto, Y.,Miura, M.,Moriyama, S.,Nakahata, M.,Nakano, Y.,Nakayama, S.,Sekiya, H.,Shiozawa, M.,Suzuki, Y.,Takeda, A.,Tanaka, H.,Tomura, T. American Physical Society 2015 PHYSICAL REVIEW D - Vol.91 No.5
Real-time supernova neutrino burst monitor at Super-Kamiokande
Abe, K.,Haga, Y.,Hayato, Y.,Ikeda, M.,Iyogi, K.,Kameda, J.,Kishimoto, Y.,Miura, M.,Moriyama, S.,Nakahata, M.,Nakano, Y.,Nakayama, S.,Sekiya, H.,Shiozawa, M.,Suzuki, Y.,Takeda, A.,Tanaka, H.,Tomura, T. North-Holland ; Elsevier Science Ltd 2016 Astroparticle physics Vol.81 No.-
<P>We present a real-time supernova neutrino burst monitor at Super-Kamiokande (SIC). Detecting supernova explosions by neutrinos in real time is crucial for giving a clear picture of the explosion mechanism. Since the neutrinos are expected to come earlier than light, a fast broadcasting of the detection may give astronomers a chance to make electromagnetic radiation observations of the explosions right at the onset. The role of the monitor includes a fast announcement of the neutrino burst detection to the world and a determination of the supernova direction. We present the online neutrino burst detection system and studies of the direction determination accuracy based on simulations at SK. (C) 2016 Elsevier B.V. All rights reserved.</P>
Abe, K.,Haga, Y.,Hayato, Y.,Ikeda, M.,Iyogi, K.,Kameda, J.,Kishimoto, Y.,Miura, M.,Moriyama, S.,Nakahata, M.,Nakajima, T.,Nakano, Y.,Nakayama, S.,Orii, A.,Sekiya, H.,Shiozawa, M.,Takeda, A.,Tanaka, H. American Physical Society 2017 Physical Review D Vol.95 No.1
<P>We have searched for proton decay via p -> e(+) pi(0) and p -> mu(+) pi(0) using Super-Kamiokande data from April 1996 to March 2015, 0.306 megaton center dot years exposure in total. The atmospheric neutrino background rate in Super-Kamiokande IV is reduced to almost half that of phase I-III by tagging neutrons associated with neutrino interactions. The reach of the proton lifetime is further enhanced by introducing new signal criteria that select the decay of a proton in a hydrogen atom. No candidates were seen in the p -> e(+) pi(0) search. Two candidates that passed all of the selection criteria for p -> mu(+) pi(0) have been observed, but these are consistent with the expected number of background events of 0.87. Lower limits on the proton lifetime are set at tau/B(p -> mu(+) pi(0)) > 1.6 x 10(34) years and tau/B(p -> mu(+) pi(0) ) > 7.7 x 10(33) years at 90% confidence level.</P>
Search for Boosted Dark Matter Interacting with Electrons in Super-Kamiokande
Kachulis, C.,Abe, K.,Bronner, C.,Hayato, Y.,Ikeda, M.,Iyogi, K.,Kameda, J.,Kato, Y.,Kishimoto, Y.,Marti, Ll.,Miura, M.,Moriyama, S.,Nakahata, M.,Nakano, Y.,Nakayama, S.,Okajima, Y.,Orii, A.,Pronost, G American Physical Society 2018 Physical Review Letters Vol.120 No.22
<P>A search for boosted dark matter using 161.9 kt yr of Super-Kamiokande IV data is presented. We search for an excess of elastically scattered electrons above the atmospheric neutrino background, with a visible energy between 100 MeV and 1 TeV, pointing back to the Galactic center or the Sun. No such excess is observed. Limits on boosted dark matter event rates in multiple angular cones around the Galactic center and Sun are calculated. Limits are also calculated for a baseline model of boosted dark matter produced from cold dark matter annihilation or decay. This is the first experimental search for boosted dark matter from the Galactic center or the Sun interacting in a terrestrial detector.</P>