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Hiroshi Yashima,Norihiro Matsuda,Yoshimi Kasugai,Hiroshi Nakashima,Yukio Sakamoto,Hiroshi Matsumura,Hiroshi Iwase,Norikazu Kinoshita,David Boehnlein,Gary Lautenschlager,Anthony Leveling,Nikolai Mokhov 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.23
The JASMIN Collaboration has performed an experiment to conduct measurements of nuclear reaction rates around the anti-proton production (Pbar) target at the Fermi National Accelerator Laboratory (FNAL). At the Pbar target station, the target, consisting an Inconel 600 cylinder, was irradiated by a 120 GeV/c proton beam from the FNAL Main Injector. The beam intensity was 3.6 X 10^(12) protons per second. Samples of Al, Nb, Cu, and Au were placed near the target to investigate the spatial and energy distribution of secondary particles emitted from it. After irradiation, the induced activities of the samples were measured by studying their gamma ray spectra using HPGe detectors. The production rates of 30 nuclides induced in Al, Nb, Cu, Au samples were obtained. These rates increase for samples placed in a forward (small angle) position relative to the target. The angular dependence of these reaction rates becomes larger for increasing threshold energy. These experimental results are compared with Monte Carlo calculations. The calculated results generally agree with the experimental results to within a factor of 2 to 3.
Hiroshi Matsumura,Norikazu Kinoshita,Hiroshi Iwase,Akihiro Toyoda,Yoshimi Kasugai,Norihiro Matsuda,Yukio Sakamoto,Hiroshi Nakashima,Hiroshi Yashima,Nikolai Mokhov,Anthony Leveling,David Boehnlein,Kamr 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.23
In an antiproton production (Pbar) target station of the Fermi National Accelerator Laboratory (FNAL), the secondary particles produced by bombarding a target with 120-GeV protons are shielded by a thick iron shield. In order to obtain experimental data on high-energy neutron transport at more than 100-GeV-proton accelerator facilities, we indirectly measured more than 100-MeV neutrons at the outside of the iron shield at an angle of 50˚ in the Pbar target station. The measurement was performed by using the Au activation method coupled with a low-background γ-ray counting system. As an indicator for the neutron flux, we determined the production rates of 8 spallation nuclides (^(196)Au, ^(188)Pt, ^(189)Ir, ^(185)Os, ^(175)Hf, ^(173)Lu, ^(171)Lu, and ^(169)Yb) in the Au activation detector. The measured production rates were compared with the theoretical production rates calculated using PHITS. We proved that the Au activation method can serve as a powerful tool for indirect measurements of more than100-MeV neutrons that play a vital role in neutron transport. These results will be important for clarifying the problems in theoretical calculations of high-energy neutron transport.
Nobuhisa Kanahara(Nobuhisa Kanahara ),Hiroshi Kimura(Hiroshi Kimura ),Toshihiko Kinoshita(Toshihiko Kinoshita ),Masaomi Iyo(Masaomi Iyo ),Yoshiteru Takekita(Yoshiteru Takekita ) 대한정신약물학회 2023 CLINICAL PSYCHOPHARMACOLOGY AND NEUROSCIENCE Vol.21 No.1
Dopamine supersensitivity psychosis (DSP) is an unstable clinical condition observed in individuals with schizophrenia who have been treated with an antipsychotic medication at a high dosage and/or for a long period. An up-regulation of dopamine D2 receptors (DRD2) is thought to be involved in the essential pathology of DSP. An antipsychotic agent with both tight binding to DRD2 and a long half-life is generally effective for treating DSP, but a patient who meets the criteria of treatment-resistant schizophrenia sometimes needs treatment with clozapine. We report the case details of two patients whose DSP was not controlled with several antipsychotics but was successfully controlled with asenapine. Asenapine binds to a broad range of dopamine receptors and serotonin receptors, and it is thus distinct from other atypical antipsychotics. The unique profile of asenapine may contribute to the control of severe DSP symptoms in individuals with schizophrenia.
Hiroshi Shimatani,Ken Norizuki,Akihiro Ito,Masayoshi Kinoshita 한국영어평가학회 2009 영어평가 Vol.3 No.1
This is the fifth report on the research project which compared the older version of the TOEIC?? test with the new one. Through an examination of the ability measures based on the Rasch analysis, it is confirmed that there is a relatively high degree of parallelism between the two versions of the TOEIC?? in terms of examinees’ placement. A close examination of the exceptional measures revealed that 6.6% of the total 136 test takersmight have been misplaced due to personal factors such as lack of test time and lack of interest in answering questions. However, it is still too early to conclude that the observed differences are due to either test format or personal factors, or both.
Levitation Control Experiment at Standstill in PM LSM Controlled-Repulsive Maglev Vehicle
Kinjiro YOSHIDA,Hiroshi TAKAMI,Chiyuki JOZAKI,Shizuo KINOSHITA 전력전자학회 1998 ICPE(ISPE)논문집 Vol.- No.-
This paper proposes a new repulsive-Maglev vehicle in which a vertical type PM linear synchronous motor (LSM) can levitate and propel simultaneously, independently of the vehicle speeds. A compact control method is developed which is based on the concept of controlling individually the levitation system by armature-current and the propulsion system by mechanical load-angle. The levitation-motion control experiments have carried out successfully together with positioning at standstill. The pitching motion has been compensated for very well by using the zero-phase-current control method proposed here.<br/>