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C. J. Yoon,H. Akikawa,K. Aoki,Y. Fukao,H. Funahashi,M. Hayata,K. Imai,K. Miwa,H. Okada,N. Saito,H. D. Sato,K. Shoji,H. Takahashi,K. Taketani,J. Asai,M. Kurosawa,M. Ieiri,T. Hayakawa,T. Kishimoto,A. Sa 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.23
We determined scattering length and effective range of ΛΛ scattering for the ΛΛ relative energy (M_(ΛΛ)-2M_Λ) from ΛΛ threshold to 30 MeV/c_2. Phase shift of the ΛΛ wave function which described by scattering length and effective range was determined by fitting the ΛΛ mass spectrum. The obtained scattering length -0.10^(+0.37)_(-1.56) ± 0.04, and effective range 13.90 ^(+14.35)_(-9.13) ± 10.53 fm is the most consistent with the values predicted by using a series of the Nijmegen soft core models NSC97's. However the predicted values by using the Nijmegen hard core model ND (G-matrix), the extended soft core model ESC00, and the Kyoto-Niigata FSS are out of three standard deviations from the determined scattering parameters. Further, we determine ΛΛ potential by fitting the ΛΛ invariant mass spectrum using numerically solved ΛΛ wave function with two-Gaussian shaped potential well. The ΛΛ scattering parameters derived from the wave function are found to be scattering length -0.09, and effective range 29.34 fm with a maximum phase shift of 2.4 deg.
A Study on Ferro Fluid Dynamic Bearing Spindel Characteristics by High Frequency Vibration Ssystem
M. Miwa,H. Harita,T. Nishigami,R. Kaneko,H. Unozawa 한국트라이볼로지학회 2002 한국트라이볼로지학회 학술대회 Vol.2002 No.10
Ball bearings (BB) are generally used in spindles of disk drives at present, but they have been known that BB generate high frequency vibration. Fluid dynamic bearings (FDB) having high-rotational accuracy and small vibration characteristics have been developed as next generation spindles. Especially, a ferro fluid bearing (FFB) spindle has the advantage to prevent leakage and dispersion of lubricating oil using a ferro seal. In this study, we measured damping characteristics and frequency characteristics of these bearing spindles using a high-frequency vibration base. High frequency excitation was added to these bearing spindles mounted on the vibration base, and we proved that FFB and FDB spindles have effective damping..
Search for theH-dibaryon resonance inC12(K−,K+ΛΛX)
Yoon, C. J.,Akikawa, H.,Aoki, K.,Fukao, Y.,Funahashi, H.,Hayata, M.,Imai, K.,Miwa, K.,Okada, H.,Saito, N.,Sato, H. D.,Shoji, K.,Takahashi, H.,Taketani, K.,Asai, J.,Kurosawa, M.,Ieiri, M.,Hayakawa, T. American Physical Society 2007 PHYSICAL REVIEW C - Vol.75 No.2
( Ken Fukunaga ),( Kazuko Nagase ),( Takeshi Kusaka ),( Nobuyuki Hida ),( Yoshio Ohda ),( Koji Yoshida ),( Katsuyuki Tozawa ),( Koji Kamikozuru ),( M Iimuro ),( Shiro Nakamura ),( Hiroto Miwa ),( Taka 대한소화기기능성질환·운동학회 2009 Gut and Liver Vol.3 No.1
Background/Aims: Cytapheresis (CAP) is a novel strategy for ulcerative colitis (UC). However, there is insufficient data on the long-term outcome of UC patients who achieve remission by CAP. This study involved patients with severe UC who refracted to intravenous (iv) corticosteroid. Methods: Forty-seven UC patients who had received CAP therapy for the first time within 1 year after UC diagnosis were followed for 36 months. One of the inclusion criteria was a clinical activity index (CAI) of ≥7 points at the end of a 2-week iv course of corticosteroid therapy. CAP therapy consisted of ten sessions over 10 weeks. Results: CAP induced clinical remission (CAI≤4) in 70.2% patients (33/47). The number of submissions for colectomy was higher for severe UC at entry (CAI≥12, n=25) than for moderately severe UC at entry (7≤CAI<12, p=15; p<0.02). The cumulative rates of avoiding surgery and relapse were 54.5% and 24.2%, respectively, at 36 months in patients who responded to CAP therapy. This was similar to that of iv cyclosporine reported recently. Conclusions: This study suggest that CAP is an effective therapy in patients who are refractory to conventional medications including iv corticosteroid. Increased remission rates should be expected in refractory patients with moderately severe UC. (Gut and Liver 2009;3:41-47)