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Search Results: 1 - 10 of 1466 matches for " Hiroaki Matsuki "
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Crystal Growth of ZnO Microneedles in Water Containing Microbubbles  [PDF]
Yomei Tokuda, Hiroaki Matsuki, Yoshikatsu Ueda, Hirokazu Masai, Toshinobu Yoko
New Journal of Glass and Ceramics (NJGC) , 2014, DOI: 10.4236/njgc.2014.43007
Abstract:
Microbubble technology is now available in a wide range of industrial fields. The liquid containing microbubbles possesses a large number of air-liquid interfaces, and also generates radicals during bubble collapse. Here, we synthesized ZnO powder to explore the potential of microbubbles as starting materials for the formation of crystalline micro- or nanoparticles. The bubbles facilitated the growth of ZnO microneedles in high yields, and enhanced the reaction by radicals generated on bubble collapsing.
The Existence of Symptomatic Localized Lesion(s) and ≤4 Lesions Are Indications for Radiotherapy: Screening Computed Tomography Images of Patients with Metastatic/Recurrent/Inoperable Cancer in a Single Japanese Institution Observational Study  [PDF]
Shinsaku Yamaguchi, Yuichi Matsuki, Shinji Yotsumoto, Hiroaki Satou, Michiko Watanabe, Sachie Yotsumoto
International Journal of Medical Physics,Clinical Engineering and Radiation Oncology (IJMPCERO) , 2016, DOI: 10.4236/ijmpcero.2016.51012
Abstract: Background: To investigate the prevalence of indications for radiotherapy (RT) in patients with metastatic/recurrent/inoperable cancer. We also sought to analyze such patients’ clinical and radiological characteristics for indications of radiotherapy in those patients who had either surveillance or an initial assessment done by computed tomography (CT). Methods: Two diagnostic radiologists and a radiation oncologist evaluated a total of 13,225 consecutive patients from January 2012 to December 2012 at a single Japanese institution. Patients with metastatic/recurrent/ inoperable cancer were selected for further study. After two diagnostic radiologists identified patients with a detectable cancerous lesion, a radiation oncologist subsequently investigated whether there was any indication for RT. The oncologist also evaluated the relationship between patients’ clinical/radiological factors, and patients with or without indications for RT. Results: Two diagnostic radiologists selected 329 patients showing a detectable gross cancerous lesion. In this patient group, a radiation oncologist identified 196 patients with metastatic/recurrent/inoperable cancer, of which 96 patients (49%) showed an indication for RT. According to both univariate and multivariate analyses, ≤4 lesions were significantly associated with patients who showed an indication for RT (P = 0.0002 and P < 0.0001, respectively). The existence of symptomatic, localized lesion(s) was also significantly associated with those who showed an indication for RT (P < 0.001 and P > 0.001, respectively). Conclusions: In screening CT images, approximately half of all patients with metastatic/recurrent/inoperable cancer showed an indication for RT. Moreover, ≤4 lesions and/or the existence of a symptomatic, localized lesion were highly suggestive of an indication for RT. These findings would be of considerable interest to radiation oncologists planning appropriate treatments for cancer patients.
Schr?dinger Equation for Heavy Mesons Expanded in $1/m_Q$
Takayuki Matsuki
Physics , 1995, DOI: 10.1142/S0217732396000291
Abstract: Operating just once the naive Foldy-Wouthuysen-Tani transformation on the Schr\"odinger equation for $Q\bar q$ bound states described by a hamiltonian, we systematically develop a perturbation theory in $1/m_Q$ which enables one to solve the Schr\"odinger equation to obtain masses and wave functions of the bound states in any order of $1/m_Q$. It is shown that positive energy projection with respect to the heavy quark sector of a wave function is, at each order of perturbation, proportional to the 0-th order solution. There appear also negative components of the wave function except for the 0-th order, which contribute also to higher order corrections to masses.
A note on toroidalization: the problem of resolution of singularities of morphisms in the logarithmic category
Kenji Matsuki
Mathematics , 2003,
Abstract: This is a note on toroidalization, formulated as the problem of resolution of singularities of morphisms in the logarithmic category. It is submitted to the proceedings of the Barrett conference held at the University of Tennessee at Knoxville in April 2002.
An example of orthogonal triple flag variety of finite type
Toshihiko Matsuki
Mathematics , 2010,
Abstract: Let G be the split special orthogonal group of degree 2n+1 over a field F of char F \ne 2. Then we describe G-orbits on the triple flag varieties G/P\times G/P\times G/P and G/P\times G/P\times G/B with respect to the diagonal action of G where P is a maximal parabolic subgroup of G of the shape (n,1,n) and B is a Borel subgroup. As by-products, we also describe GL_n-orbits on G/B, Q_{2n}-orbits on the full flag variety of GL_{2n} where Q_{2n} is the fixed-point subgroup in Sp_{2n} of a nonzero vector in F^{2n} and 1\times Sp_{2n}-orbits on the full flag variety of GL_{2n+1}. In the same way, we can also solve the same problem for SO_{2n} where the maximal parabolic subgroup P is of the shape (n,n).
Lectures on Factorization of Birational Maps
Kenji Matsuki
Mathematics , 2000,
Abstract: This is an expanded version of the notes for the lectures given by the author at RIMS in the summer of 1999 to give a detailed account of the proof for the (weak) factorization theorem of birational maps by Abramovich-Karu-Matsuki-W{\l}odarczyk.
Stein extensions of Riemann symmetric spaces and some generalization
Toshihiko Matsuki
Mathematics , 2002,
Abstract: It was proved by Huckleberry that the Akhiezer-Gindikin domain is included in the ``Iwasawa domain'' using complex analysis. But we can see that we need no complex analysis to prove it. In this paper, we generalize the notions of the Akhiezer-Gindikin domain and the Iwasawa domain for two associated symmetric subgroups in real Lie groups and prove the inclusion. Moreover, by the symmetry of two associated symmetric subgroups, we also give a direct proof of the known fact that the Akhiezer-Gindikin domain is included in all cycle spaces.
A correction to the paper "Log Abundance Theorem for Threefolds"
Kenji Matsuki
Mathematics , 2003,
Abstract: This is a correction to the afore-mentioned paper in Duke Math. J. vol. 75 (1994), 99-119 by S. Keel, K. Matsuki, and J. McKernan. We completely rewrite Chapter 6 according to the original manuscript of the second author, in order to fix some crucial mistakes pointed out by Dr. Qihong Xie.
Equivalence of domains arising from duality of orbits on flag manifolds III
Toshihiko Matsuki
Mathematics , 2004,
Abstract: In [GM1], we defined a G_R-K_C invariant subset C(S) of G_C for each K_C-orbit S on every flag manifold G_C/P and conjectured that the connected component C(S)_0 of the identity would be equal to the Akhiezer-Gindikin domain D if S is of nonholomorphic type. This conjecture was proved for closed S in [WZ2,WZ3,FH,M4] and for open S in [M4]. It was proved for the other orbits in [M5] when G_R is of non-Hermitian type. In this paper, we prove the conjecture for an arbitrary non-closed K_C-orbit when G_R is of Hermitian type. Thus the conjecture is completely solved affirmatively.
Equivalence of domains arising from duality of orbits on flag manifolds II
Toshihiko Matsuki
Mathematics , 2003,
Abstract: In [GM1], we defined a G_R-K_C invariant subset C(S) of G_C for each K_C-orbit S on every flag manifold G_C/P and conjectured that the connected component C(S)_0 of the identity will be equal to the Akhiezer-Gindikin domain D if S is of nonholomorphic type. This conjecture was proved for closed S in [WZ1,WZ2,FH,M6] and for open S in [M6]. In this paper, we prove the conjecture for all the other orbits when G_R is of non-Hermitian type.
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