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Fluorescence quantum yield of Gd_(0.9-x)R_xEu_(0.1)OOH(R=Y, La) crystals

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Journal of Rare Earths 2015年第12期33卷 1256-1260页

作者： Hiroaki Samata Katsutoshi Kobayashi masashi hanioka Tadashi C.Ozawa Graduate School of Maritime Sciences Kobe University Materials Development Group Superconducting Properties Unit National Institute for Materials Science

*** （R=Y, La） crystals were synthesized by a flux method using a mixture of NaOH and KOH as the flux. X-ray diffraction data were well refined using the Rietveld method assuming that the crystals had a monoclinic structre belonging to the P21/m space group. The unit cell volumes of the Gdo.9 *** crystals increased with increasing x, whereas those of *** decreased with increasing x. The Commission Internationale de IEclairage （CIE） chromaticity coordinates of Gdo.9 *** （R=Y, La） crystals were located in the red region and were nearly constant over the range ofx values considered. The fluorescence quantum yield Dr monotonically decreased with increasing x regardless of the ionic radii of the substitute ions. The fact that the Dr value of Lao.9EuoAOOH was greater than that of *** indicated that the observed decrease in the values of the Gdo.9-,LaxEuo.1OOH crystals up to x=0.3 could not be attributed to an increase in the distance between Eu3＋ ions or to a decrease in the Gd3＋ content. The decrease might be due to an increase of killer centers introduced by elemental substitutions with the larger ion.

关键词： rare-earth oxyhydroxide phosphor elemental substitution fluorescence quantum yield

Regeneration mechanisms and therapeutic strategies for neuromuscular junctions in aging and diseases

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Neural Regeneration Research 2025年第1期20卷 193-194页

作者： masashi Fujitani Abu Md Mamun Tarif Yoshinori Otani Department of Anatomy and Neuroscience Faculty of MedicineShimane UniversityShimaneJapan

The neuromuscular junction(NMJ)is an essential synaptic structure composed of motor neurons,skeletal muscles,and glial cells that orchestrate the critical process of muscle contraction(Li et al.,2018).The typical NMJ structure is classically described as having a“pretzel-like”shape in mice(Figure 1),whereas human NMJs have a smaller,fragmented structure throughout *** NMJs exhibit smaller or fragmented endplates,partial denervation,reduced numbers of synaptic vesicles,abnormal presynaptic mitochondria,and dysfunctional perisynaptic Schwann cells(Alhindi et al.,2022).

关键词： aging structure Figure

Potential of non-Western medicines in chemoradiotherapy for cervical cancer

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World Journal of Clinical Cases 2025年第2期13卷 21-23页

作者： Takashi Ono masashi Koto Department of Radiation Oncology Faculty of MedicineYamagata UniversityYamagata 990-9585Japan

This editorial explores the potential integration of non-Western medicine into radiotherapy for cervical *** radiotherapy remains a radical treatment for cervical cancer,its associated toxicity and decline in quality of life can significantly impact patients’***,most treatments are supportive,with no specific treatment options available in Western ***-Western medicine,often less toxic and easier to administer,has shown promising results when used alongside radiotherapy for cervical *** these potential benefits,challenges such as limited evidence and restricted application areas *** non-Western medicines may offer potential improvements in chemoradiotherapy outcomes for cervical cancer,further research is necessary to substantiate these benefits.

关键词： Cervical cancer Radiotherapy Non-Western medicine Kampo Herbal medicine

Studies on multiferroic materials in high magnetic fields

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Frontiers of physics 2012年第4期7卷 386-398页

作者： masashi Tokunaga The International MegaGauss Science Laboratory The Institute for Solid State Physics (IMGSL-ISSP) The University of Tokyo Kashiwa 277-8581 Japan

In this article, studies on the magnetoelectric effects of multiferroic materials in high magnetic fields, particularly pulsed magnetic fields, are discussed and results for some representative ma- terials are presented. In the discussions on representative materials, the relationship between the crystallographic symmetry and the linear magnetoelectric effect in Cr203 is introduced. Then dras- tic changes in polarization caused by magnetic transitions are discussed through a case study of manganites with a perovskite4ype structure. In addition, high field studies on the magnetoelectric effects in BiFeO3, which is an exceptional multiferroic material, are presented and discussed in the framework of the Landau-Ginzburg theory.

关键词： high magnetic field multiferroic materials magnetoelectric effect

Application of the generalized body-fixed coordinate system for the wave-body interaction problem of a small-depth elastic structure in head seas

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Journal of Hydrodynamics 2021年第6期33卷 1255-1270页

作者： Kyeonguk Heo masashi Kashiwagi School of Naval Architecture and Ocean Engineering University of UlsanUlsanKorea Department of Naval Architecture and Ocean Engineering Osaka UniversitySuitaJapan

The body-fixed coordinate system is applied to the wave-body interaction problem of a small-depth elastic structure which has both rigid and elastic body motions in head *** the weakly non-linear assumption,the perturbation scheme is used and the expansion is conducted up to second-order to consider several non-linear *** solve the boundary value problem,linearization is carried out based not on inertial coordinate but on body-fixed coordinate which could be accelerated by a motion of a *** first,the main feature of the application of body-fixed coordinate system for a seakeeping problem is briefly *** that the transformation of a coordinate system is extended to consider an elastic body motion and several physical variables are re-described in the generalized *** has been found that the deformation gradient could be used for the transformation of a coordinate system if several conditions are *** there are only vertical bending in elastic modes and the structure has relatively small depth,these conditions are generally *** calculate an elastic motion of a body,the generalized mode method is adopted and the mode shape is obtained by solving eigen-value problem of dynamic beam *** the boundary condition of the body-fixed coordinate system,the motion effect reflected to free-surface boundary is considered by extrapolating each mode shape to the horizontal direction from a *** last,simple numerical tests are implemented as a validation *** second-order hydrodynamic force of a freely floating hemisphere is first calculated in zero forward speed ***,motion and added resistance of a ship with forward speed are considered at different flexibility to confirm the effect of an elastic body motion in body-fixed coordinate system.

关键词： Hydroelasticity Higher-order boundary element method(HOBEM) generalized mode method perturbation scheme body-fixed coordinate system wave-body interaction

Two-dimensional self-assembly of melem and melemium cations at pH-controlled aqueous solution-Au（111） interfaces under electrochemical control

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Frontiers of Chemical Science and Engineering 2016年第2期10卷 294-300页

作者： Shinobu Uemura Kenki Sakata masashi Aono Yusuke Nakamura masashi Kunitake Department of Advanced Materials Sciences Faculty of Engineering Kagawa University Kagawa 761-0396 Japan Graduate School of Science and Technology Kumamoto University Kumamoto 860-8555 Japan

Two-dimensional self-assembly of melem at pH-controlled aqueous solution-Au（111） interfaces has been investigated by electrochemical scanning tunneling microscopy. In the solutions with pH 〉 pKbl of melem, two ordered self-assembled structures （honeycomb and close-packed structures） and one disordered fibrillar structure were observed as a function of the surface coverage ofmelem controlled by the electrode potential. In contrast, in the acidic solution with pH 〈 pKbl of melem, only the self-assembled honeycomb network was observed in a relatively wide potential range probably due to the presence of monoprotonated melem cations. Dots attrib- uted to counteranions were frequently observed in the pores of the honeycomb network. The lack of close-packed and fibrillar structures at low pH （〈 pKbl） is attributed to ionic repulsion of melemium cations.

关键词： self-assembly scanning tunneling micro-scopy electrochemistry structural phase transition melem

Flow Visualization around a Double Wedge Airfoil Model with Focusing Schlieren System

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Journal of Thermal Science 2006年第1期15卷 31-36页

作者： masashi KASHITANI Yutaka YAMAGUCHI Department of Aerospace Engineering National Defense Academy 1-10-20 Hashirimizu Yokosuka Kanagawa 239-8686Japan

In the present study, aerodynamic characteristics of the double wedge airfoil model were investigated in a transonic flow by using the shock tube as an intermittent wind tunnel. The driver and driven gases of the shock tube are dry air. The airfoil model of double wedge has the span of 58 mm, chord length c = 75 mm and its maximum thickness is 7.5 mm. The apex of the double wedge airfoil model is located on the 35% chord length from the leading edge. The range of hot gas Mach numbers are from 0.80 to 0.88, and the Reynolds numbers based on chord length are 3.11× 10^5- 3.49× 10^5, respectively. The flow visualizations were performed by the sharp focusing schlieren method which can visualize the three dimensional flow fields. The results show that the present system can visualize the transonic flowfield clearer than the previous system, and the shock wave profiles of the center of span in the test section are visualized

关键词： shock wave schlieren method transonic flow double wedge airfoil model

Regulation of hepatic function by brain neuropeptides

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World Journal of Gastroenterology 1998年第3期4卷 12-16页

作者： masashi Yoneda School of Medicine Hirosaki University Japan Postgraduate School Hirosaki University Japan University of California Los Angeles CA United States Second Department of Medicine Asahikawa Medical College Japan Department of Medicine Intl. Univ. of Health and Welfare Japan Japan. Society of Gastroenterology Japan Second Department of Medicine Asahikawa Medical College Asahikawa 078 Nishikagura 4-5-3 Japan

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关键词： liver/physiology thyrotropin releasing hormone corticotropin releasing factor neuropeptide Y central nervous system bombesin βendorphin DAlaMet enkepalinamide

Negative refraction of deep water waves through water channel network

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Journal of Hydrodynamics 2019年第4期31卷 840-847页

作者： Takahito Iida masashi Kashiwagi Department of Naval Architecture and Ocean Engineering Osaka University Suita Osaka 5650871 Japan Research Fellow of Japan Society for the Promotion of Science Chiyoda-ku Tokyo 1020083 Japan

A design method of a negative refractive index for free surface water waves in deep water is presented. To obtain a condition of a negative index, an analogy between water waves in a water channel and electric waves in an electric circuit is employed. An analytical solution of waves around a periodic array of rectangular columns is obtained by a circuit analysis. Attention is not focused on columns but a space among columns, and then the space is regarded as the water channel. Therefore, the circuit analysis can be applied to water waves. One channel is treated as a unit structure and a number of channels are periodically cascaded as a network. The negative refraction and backward waves by a network of the water channels are shown. Since the negative refraction might occur even around simple periodic structures, it is meaningful to understand wave phenomenon around offshore structures and develop innovative technology.

关键词： Negative refractive index backward wave water channel network equivalent circuit deep water