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Search Results: 1 - 10 of 139206 matches for " K. Miyamoto "
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Conjunctival extranodal marginal zone lymphoma of mucosa-associated lymphoid tissue in the fornix: do not overlook conjunctival lymphomas
Hata M,Miyamoto K,Ogino K,Sumiyoshi S
Clinical Ophthalmology , 2013,
Abstract: Masayuki Hata,1 Kazuaki Miyamoto,1 Ken Ogino,1 Shinji Sumiyoshi,2 Nagahisa Yoshimura11Department of Ophthalmology and Visual Sciences, 2Department of Diagnostic Pathology, Kyoto University Graduate School of Medicine, Sakyo, Kyoto, JapanBackground: Here we report three cases of conjunctival lymphoma that were initially unnotified or misdiagnosed as other ocular diseases because of the small tumor size, peripheral tumor location (the tumor was hidden in the fornix), and nonspecific symptoms.Methods: Three patients diagnosed with conjunctivitis or nasolacrimal duct obstruction were referred to our clinic because they were unresponsive to standard medical treatments. Routine anterior segment examination did not reveal any lesions, but further careful examination with a strong eyelid draw revealed minimally elevated tumors in the peripheral fornix under the lid. Excisional biopsies were performed.Results: Histopathologic and immunohistologic examinations indicated the presence of extranodal marginal zone lymphoma of mucosa-associated lymphoid tissue (MALT lymphoma). All patients underwent additional radiation therapy. There was no evidence of recurrence in any patient during the follow-up period.Conclusion: Detection of conjunctival lymphoma can be challenging. If no apparent lesion is present and the patient has nonspecific symptoms, the inner surface of the eyelid should be carefully examined. Elaborate eyelid eversion, with eyeball movement, should be performed to avoid misdiagnosing or overlooking peripheral conjunctival lymphomas.Keywords: MALT lymphoma, conjunctival lymphoma, misdiagnosis, fornix
History Memorized and Recalled upon Glass Transition
Y. Miyamoto,K. Fukao,H. Yamao,K. Sekimoto
Physics , 2001, DOI: 10.1103/PhysRevLett.88.225504
Abstract: The memory effect upon glassification is studied in the glass to rubber transition of vulcanized rubber with the strain as a controlling parameter. A phenomenological model is proposed taking the history of the temperature and the strain into account, by which the experimental results are interpreted. The data and the model demonstrate that the glassy state memorizes the time-course of strain upon glassification, not as a single parameter but as the history itself. The data also show that the effect of irreversible deformation in the glassy state is beyond the scope of the present model. Authors' remark: The title of the paper in the accepted version is above. The title appeared in PRL is the one changed by a Senior Assistant Editor after acceptance of the paper. The recovery of the title was rejected in the correction process.
Cu Nuclear Quadrupole Resonance Study of La_{2-x}Sr_xCu_{1-y}Zn_yO_4 (x=0.10, 0.15 and 0.20): Zn-induced Wipeout Effect near the Magnetic and Electric Instability
H. Yamagata,H. Miyamoto,K. Nakamura,M. Matsumura,Y. Itoh
Physics , 2003, DOI: 10.1143/JPSJ.72.1768
Abstract: We studied Zn-substitution effect on the high-T_c superconductors, underdoped La_{2-x}Sr_xCu_{1-y}Zn_yO_4 (x=0.10; y=0, 0.01, 0.02), optimally doped (x=0.15; y=0, 0.02), and overdoped (x=0.20; y=0, 0.03, 0.06) in a temperature range of T=4.2-300 K, using Cu nuclear quadrupole resonance (NQR) spin-echo technique. We found full disappearance of the Cu NQR signals for the Zn-substituted, Sr-underdoped x=0.10 samples below about 40 K, partial disappearance for the Sr-optimally doped ones below about 50 K, but not for the overdoped x=0.20 ones. From the Zn-doping, the Sr-doping and the temperature dependence of the wipeout effect, we associate the wipeout effect with Zn-induced Curie magnetism or its extended glassy charge-spin stripe formation.
Zn-induced wipeout effect on Cu NQR spectra in La$_{2-x}$Sr$_x$Cu$_{1-y}$Zn$_y$O$_4$
H. Yamagata,H. Miyamoto,K. Nakamura,M. Matsumura,Y. Itoh
Physics , 2002, DOI: 10.1016/S0921-4534(02)02419-X
Abstract: We report a systematic study of Zn-substitution effect on Cu NQR spectrum for high $T_c$ superconductors La$_{2-x}$Sr$_x$Cu$_{1-y}$Zn$_y$O$_4$ from carrier-underdoped to -overdoped regimes (polycrystalline samples, $x$ =0.10, 0.15, and 0.20). We observed no appreciable wipeout effect for the overdoped samples, a gradual and partial wipeout effect below about 80 K for the optimally doped ones, and very abrupt and full wipeout effect below about 40 K for the underdoped ones. The wipeout effect indicates a highly enhanced spectral weight of Cu spin fluctuations at a low frequency. We associate the wipeout effect with a Zn-induced local magnetism far above 40 K and with a localization effect below 40 K.
Spin-polarized Dirac-cone-like surface state with $d$ character at W(110)
K. Miyamoto,A. Kimura,K. Kuroda,T. Okuda,K. Shimada,H. Namatame,M. Taniguchi,M. Donath
Physics , 2011, DOI: 10.1103/PhysRevLett.108.066808
Abstract: The surface of W(110) exhibits a Dirac-cone-like surface state with $d$ character within a spin-orbit-induced symmetry gap. As a function of wave vector parallel to the surface, it shows nearly massless energy dispersion and a pronounced spin polarization, which is antisymmetric with respect to the Brillouin zone center. In addition, the observed constant energy contours are strongly anisotropic for all energies. This discovery opens new pathways to the study of surface spin-density waves arising from a strong Fermi surface nesting as well as $d$-electron-based topological properties.
History of the World Allergy Organization: The Miyamoto Years of 1991-1994, ICACI XIV in Kyoto, 1991
Terumasa Miyamoto
World Allergy Organization Journal , 2011, DOI: 10.1097/wox.0b013e318221584c
Initial states and the various long-time-behaviors of the unstable multilevel systems
Miyamoto, Manabu;
Brazilian Journal of Physics , 2005, DOI: 10.1590/S0103-97332005000300010
Abstract: the decaying behavior of both the survival s(t) and total p(t) probabilities for unstable multilevel systems at long times is investigated by using the n-level friedrichs model. the long-time asymptotic-forms of both s(t) and p(t) are obtained for an arbitrary initial-state extending over the unstable levels. it is then clarified how the asymptotic forms depend on the initial population in unstable levels. in particular, a special initial state that maximizes the asymptotic form of both s(t) and p(t) is found. on the other hand, the initial states eliminating the first term of their asymptotic expnasions also exist, which implies that a faster decay rather than expected can be realized. this faster decay for s(t) is numerically confirmed by considering the spontaneous emission process for the hydrogen atom interacting with the electromagnetic field. it is demonstrated that the t-4-decay and a faster decay are realized depending on the initial states, where the latter is estimated as t-8.
O Brasil e a comunidade dos países de língua portuguesa (CPLP)
Miyamoto, Shiguenoli;
Revista Brasileira de Política Internacional , 2009, DOI: 10.1590/S0034-73292009000200002
Abstract: in the last years, one focus of brazilian foreign policy has been south-south cooperation. among them, the relationship with portuguese speaking countries has taken an important role, at least in the official speech. this texts examines the real importance given by brazilian government to portuguese speaking countries since the beginning of cplp.
O Brasil e as negocia??es multilaterais
Miyamoto, Shiguenoli;
Revista Brasileira de Política Internacional , 2000, DOI: 10.1590/S0034-73292000000100006
Abstract: the article seeks to show that brazil has favored multilateral instances throughout its history. in the nineties, this trend has increased.
O estudo das Rela??es Internacionais no Brasil: o estado da arte
Miyamoto, Shiguenoli;
Revista de Sociologia e Política , 1999, DOI: 10.1590/S0104-44781999000100005
Abstract: this article reviews the study of international relations in brazil in two periods: before and after 1978. in the first period, we verify a small number of professionals and institutions devoted to these themes, whereas in the decade of the 1980's there was a notable increase in those numbers, specially with the creation of several undergratuate programs offering degrees in international relations. the article also points to the difficulties faced by this area in the country, given intermissions in both teaching and research institutions devoted to the theme as well as in specialized publications.
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