Residual and fracture strains of Bi2223 filaments and their relation to critical current under applied bending and tensile strains in Bi2223/Ag/Ag alloy composite superconductor (2008)
Ochiai, S,
Shin, JK,
Iwamoto, S,
Okuda, H,
Oh, SS,
Ha, DW,
...
Mechanical and electromagnetic stresses are exerted on Bi2223/Ag/Ag alloy superconducting composite tapes during fabrication/winding and operation, which cause reduction in critical current when the...
Comparison of the prognosis among different age groups in elderly patients with hip fracture (2008)
Hagino, T,
Ochiai, S,
Wako, M,
Sato, E,
Maekawa, S,
Hamada, Y
The influence of tensile strain to critical current of Bi2223 composite tape (2008)
Mukai, Y,
Shin, JK,
Ochiai, S,
Okuda, H,
Sugano, M,
Osamura, K
Modeling analysis of distribution of irreversible bending strain for critical current in Bi2223-composite tape (2008)
Ochiai, S,
Shin, JK,
Mukai, Y,
Matsubayashi, H,
Okuda, H,
Sugano, M,
...
Analysis of the distribution of critical current of bent Bi2223 composite tape based on a unifying parameter approach (2008)
Ochiai, S,
Shin, JK,
Okuda, H,
Sugano, M,
Hojo, M,
Osamura, K,
...
Dependence of critical current on sample length analyzed by the variation of local critical current bent of BSCCO superconducting composite tape (2008)
Matsubayashi, H,
Mukai, Y,
Shin, JK,
Ochiai, S,
Okuda, H,
Osamura, K,
...
Estimation of Young's modulus, residual strain and intrinsic fracture strain of Bi2212 filaments in Bi2212/Ag/Ag alloy composite wire (2008)
Shin, JK,
Ochiai, S,
Okuda, H,
Mukai, Y,
Matsubayashi, H,
Oh, SS,
...
Residual stresses in YAG phase of melt growth Al2O3/YAG eutectic composite estimated by indentation fracture test and finite element analysis (2008)
Ochiai, S,
Ikeda, S,
Iwamoto, S,
Sha, JJ,
Okuda, H,
Waku, Y,
...
Residual stresses in YAG phase in directionally solidified eutectic Al2O3/YAG ceramic composite estimated by X-ray diffraction (2008)
Sha, JJ,
Ochiai, S,
Okuda, H,
Waku, Y,
Nakagawa, N,
Mitani, A,
...
Direct measurement of difference in local deformation and its influence on critical current in Bi2223/Ag/Ag alloy composite tape (2008)
Shin, JK,
Ochiai, S,
Sugano, M,
Okuda, H,
Nyilas, A,
Oh, SS
Residual and fracture strains of Bi2223 filaments and their relation to critical current under applied bending and tensile strains in Bi2223/Ag/Ag alloy composite superconductor (2008)
Ochiai, S,
Shin, JK,
Iwamoto, S,
Okuda, H,
Oh, SS,
Ha, DW,
...
Thermally and mechanically induced residual strain and strain tolerance of critical current in stainless steel-laminated Bi2223/Ag/Ag alloy composite superconductors (2008)
Ochiai, S,
Rokkaku, H,
Shin, JK,
Iwamoto, S,
Okuda, H,
Osamura, K,
...
Analysis of the residual strain change of Bi2212, Ag alloy and Ag during the heating and cooling process in Bi2212/Ag/Ag alloy composite wire (2008)
Shin, JK,
Ochiai, S,
Sugano, M,
Okuda, H,
Mukai, Y,
Sato, M,
...
International round robin test for mechanical properties of Nb3Sn superconductive wires at room temperature (2008)
Osamura, K,
Nyilas, A,
Thoener, M,
Seeber, B,
Fluekiger, R,
Ilyin, Y,
...
Mechanical behavior and strain dependence of the critical current of DI-BSCCO tapes (2008)
Osamura, K,
Machiya, S,
Suzuki, H,
Ochiai, S,
Adachi, H,
Ayai, N,
...
International round robin test for mechanical properties of Nb§3Sn superconductive wires at room temperature. (2008)
Osamura, K.,
Nyilas, A.,
Thoener, M.,
Seeber, B.,
Flükiger, R.,
Ilyin, Y.,
...
Superconductor Science and Technology, 21(2008) S.045006/1-10
Direct measurement of difference in local deformation and its influence on critical current in Bi2223/Ag/Ag alloy composite tape. (2008)
Shin, J. K.,
Ochiai, S.,
Sugano, M.,
Okuda, H.,
Nyilas, A.,
Oh, S. S.
Scripta Materialia, 59(2008) S.448-50
Transpedicular hydroxyapatite grafting with indirect reduction for thoracolumbar burst fractures with neurological deficit: A prospective study (2007)
Toyone, T,
Ozawa, T,
Wada, Y,
Kamikawa, K,
Watanabe, A,
Yamashita, T,
...
Analytical modeling of stress-strain behavior at 1873 K of alumina/YAG composite compressed parallel and perpendicular to the solidification direction (2007)
Ochiai, S,
Sakai, Y,
Kuhara, K,
Iwamoto, S,
Sha, JJ,
Okuda, H,
...
Direct measurement of mechanical properties of Bi2223 filament using Ag alloy removed tape (2007)
Hojo, M.,
Hashimoto, M.,
Tanaka, M.,
Adachi, T.,
Sugano, M.,
Ochiai, S.,
...
Correlation between local and overall critical current of bent multifilamentary Bi2223/Ag tape (2007)
Fujimoto, M.,
Doko, D.,
Shin, J. K.,
Nakajima, H.,
Ochiai, S.,
Okuda, H.,
...
Statistical analysis of scatter in critical current of bent superconducting Bi2223 composite tape (2007)
Ochiai, S.,
Fujimoto, M.,
Shin, J. K.,
Okuda, H.,
Hojo, M.,
Osamura, K.,
...
Modeling analysis of the critical current of bent Bi2223 composite tape based on the damage strain parameter and the shape of the core (2007)
Ochiai, S.,
Matsuoka, T.,
Shin, J. K.,
Okuda, H.,
Sugano, M.,
Hojo, M.,
...
Thermally induced residual strain accumulation in Bi2223/Ag/Ag alloy composite superconductor (2007)
Ochiai, S.,
Rokkaku, H.,
Morishita, K.,
Shin, J. K.,
Iwamoto, S.,
Okuda, H.,
...
Fracture toughness of a crystalline silicon carbide fiber (Tyranno-SA3((R))) (2006)
Morishita, K,
Ochiai, S,
Okuda, H,
Inshikawa, T,
Sato, M,
Inoue, T
Quest and evaluation of topcoat materials for Environmental Barrier Ceoatings of SiC/SiC composites (2006)
Nakayama, H,
Morishita, K,
Ochiai, S,
Sekigawa, T,
Aoyama, K,
Oi, T,
...
Modes I and II interlaminar fracture toughness and fatigue delamination of CF/epoxy laminates with self-same epoxy interleaf (2006)
Hojo, M,
Ando, T,
Tanaka, M,
Adachi, T,
Ochiai, S,
Endo, Y
In situ synchrotron-radiation measurements of axial strain in laminated Bi2223 superconducting composite tapes at room temperature (2006)
Okuda, H,
Rokkaku, H,
Morishita, K,
Shin, JK,
Iwamoto, S,
Ochiai, S,
...
Variation of local critical current and its influence on overall current of bent multifilamentary Bi2223/Ag tape (2006)
Ochiai, S,
Doko, D,
Rokkaku, H,
Fujimoto, M,
Okuda, H,
Hojo, M,
...
Monte Carlo-shear lag simulation for fracture behavior of Bi2223 superconducting monofilament and its influence on critical current (2006)
Rokkakku, H,
Morishita, K,
Doko, D,
Ishida, T,
Ochiai, S,
Okuda, H,
...
Direct measurement of elastic modulus of Nb3Sn using extracted filaments from superconducting composite wire and resin impregnation method (2006)
Hojo, M,
Matsuoka, T,
Hashimoto, M,
Tanaka, M,
Sugano, M,
Ochiai, S,
...
Bending strain effect on critical current of Bi-2223 superconductor tapes-report of international round-robin-test (2005)
Kuroda, T.,
Itoh, K.,
Katagiri, K.,
Goldacker, W.,
Haessler, W.,
Haken, B. Ten,
...
Thermal stress-induced fracture of coating layer of galvannealed steel (2005)
Ochiai, S,
Iwamoto, S,
Tomida, T,
Okuda, H,
Tanaka, M,
Hojo, M
Fracture behavior and its shear lag - Monte Carlo simulation of SiC/SiC composite exposed in air at high temperatures (2005)
Morishita, K,
Tanaka, H,
Kimura, S,
Okuda, H,
Ochiai, S,
Tanaka, M,
...
Thermal stress-induced fracture of coating layer of galvannealed steel (2005)
Ochiai, S,
Iwamoto, S,
Tomida, T,
Okuda, F,
Tanaka, M,
Hojo, M
Tensile and bending behavior of melt growth Al2O3/YAG composite at ultra high temperatures (1773-2023K) (2005)
Ochiai, S,
Sakai, Y,
Sato, K,
Ueda, T,
Morishita, K,
Okuda, H,
...
Residual stress analysis and estimation of strength of Fe-Zn coating layer of galvannealed steel by means of finite element method (2005)
Ochiai, S,
Iwamoto, S,
Tomida, T,
Nakamura, T,
Okuda, H,
Tanaka, M,
...
Bending strain effect on critical current of Bi-2223 superconductor tapes - report of international round-robin-test (2005)
Kuroda, T,
Itoh, K,
Katagiri, K,
Goldacker, W,
Haessler, W,
Ten Haken, B,
...
Residual stress analysis and estimation of strength of Fe-Zn coating layer of galvannealed steel by means of finite element method (2005)
Ochiai, S,
Iwamoto, S,
Tomida, T,
Nakamura, TV,
Okuda, H,
Tanaka, M,
...
Fracture and peeling behavior of Fe-Zn intermetallic coating of galvannealed steel sheet (2005)
Ochiai, S,
Tomida, T,
Nakamura, T,
Iwamoto, S,
Okuda, H,
Tanaka, M,
...
Influence of delamination location on mesoscopic stress state and critical current under bending deformation in Bi2223/Ag superconducting composite tapes (2005)
Hojo, M,
Nakamura, M,
Tanaka, M,
Adachi, T,
Sugano, M,
Ochiai, S,
...
A Monte Carlo-shear lag simulation of tensile fracture behaviour of Bi2223 filament (2005)
Ochiai, S,
Ishida, T,
Doko, D,
Morishita, K,
Okuda, H,
Oh, SS,
...
Multiple-cracking phenomenon of the galvannealed coating layer on steels under thermal and tensile stresses (2005)
Ochiai, S,
Iwamoto, S,
Tomida, T,
Nakamura, T,
Okuda, H,
Tanaka, M,
...
Bending damage evolution and its influence on critical current and n-value of Bi2223/Ag superconducting composite tape (2005)
Doko, D,
Miyazaki, N,
Ochiai, S,
Okuda, H,
Oh, SS,
Tanaka, M,
...
Fracture characteristics of Al2O3/YAG composite at room temperature to 2023 K (2005)
Ochiai, S,
Sakai, Y,
Sato, K,
Tanaka, M,
Hojo, M,
Okuda, H,
...
Modelling of the transverse strength of fibre reinforced epoxy composite at low and high temperature (2005)
Fiedler, B,
Gagel, A,
Hobbiebrunken, T,
Schulte, K,
Hojo, M,
Ochiai, S
Analysis of mesoscopic stress states with delamination and their relation to critical current under bending deformation in Bi2223/Ag superconducting composite tapes (2005)
Hojo, M,
Nakamura, M,
Tanaka, M,
Adachi, T,
Sugano, M,
Ochiai, S,
...
Scanning anomalous small-angle scattering as a tool to examine welded bulk glass (2005)
Murase, I,
Kurosaki, R,
Okuda, H,
Ochiai, S,
Yokoyama, Y,
Inoue, A,
...
Fracture behavior of brittle coating layer on metal substrate (2005)
Ochiai, S,
Tomida, T,
Nakamura, T,
Iwamoto, S,
Okuda, H,
Tanaka, M,
...
Influence of non-uniform fiber arrangement on tensile fracture behavior of unidirectional fiber/epoxy model composites (2005)
Tanaka, M,
Hojo, M,
Hobbiebrunken, T,
Ochiai, S,
Hirosawa, Y,
Fujita, K,
...
Intercomparison of general purpose clear sky atmospheric radiative transfer models for the millimeter/submillimeter spectral range. (2005)
Melsheimer, C.,
Verdes, C.,
Buehler, S.A.,
Emde, C.,
Eriksson, P.,
Feist, D.G.,
...
Radio Science, 40(2005), RS1007, doi:10.1029/2004RS003110, 2005
Bending strain effect on critical current of Bi-2223 superconductor tapes report of international round-robin-test. (2005)
Kuroda, T.,
Itoh, K.,
Katagiri, K.,
Goldacker, W.,
Haessler, W.,
Ten Haken, B.,
...
Physica C, 425(2005) S.111-20
In situ strain measurements of Bi2223 superconducting filaments in multifilamentary Ag-sheathed Bi2223 superconducting tapes (2004)
Okuda, H,
Morishita, K,
Ochiai, S,
Dokoh, D,
Matsui, M,
Fujimoto, H,
...
Investigation of mechanical behavior of copper in Nb3Sn superconducting composite wire (2004)
Hojo, M,
Matsuoka, T,
Nakamura, M,
Tanaka, M,
Adachi, T,
Ochiai, S,
...
Improvement of Young's modulus and tensile strength of polymer impregnation and pyrolysis processed SiC/SiC composite by improved continuity of matrix (2004)
Ochiai, S,
Okuda, H,
Kimura, S,
Morishita, K,
Tanaka, M,
Hojo, M,
...
Tensile and bending fracture behaviors and their influence on critical current of multifilamentary Bi2223/Ag/Ag-Mg composite tape (2004)
Ochiai, S,
Miyazaki, N,
Nagai, T,
Doko, D,
Okuda, H,
Oh, SS,
...
Nondimensional simulation of tensile behavior of UD microcomposite under energy release rate and shear stress criteria for interfacial debonding (2004)
Ochiai, S,
Hojo, M,
Tanaka, M,
Okuda, H,
Schulte, K,
Fiedler, B
Damage evolution under bending and tensile stress and its influence on critical current of Bi2223/Ag superconducting composite tape (2004)
Ochiai, S,
Miyazaki, N,
Doko, D,
Nagai, T,
Nakamura, M,
Okuda, H,
...
Thermomechanical analysis of micromechanical formation of residual stresses and initial matrix failure in CFRP (2004)
Hobbiebrunken, T,
Hojo, M,
Fiedler, B,
Tanaka, M,
Ochiai, S,
Schulte, K
Residual strength of PIP-processed SiC/SiC single-tow minicomposite exposed at high temperatures in air as a function of exposure temperature and time (2004)
Ochiai, S,
Kimura, S,
Tanaka, H,
Hojo, M,
Morishita, K,
Okuda, H,
...
Degradation of SiC/SiC composite due to exposure at high temperatures in vacuum in comparison with that in air (2004)
Ochiai, S,
Kimura, S,
Tanaka, H,
Tanaka, M,
Hojo, M,
Morishita, K,
...
Modeling of residual stress-induced stress-strain behavior of unidirectional brittle fiber/brittle matrix composite with weak interface (2003)
Ochiai, S,
Tanaka, H,
Kimura, S,
Tanaka, M,
Hojo, M,
Okuda, K
Deformation and fracture behavior of notched and unnotched unidirectional C/C-Mg composite with Young's modulus 520 GPa and tensile strength 1 GPa (2003)
Ochiai, S,
Okuda, H,
Suzuki, N,
Tanaka, M,
Hojo, M,
Tsushima, E
Bending deformation and its influence on critical current in Bi2223 composite superconducting tapes (2003)
Hojo, M,
Matsuoka, T,
Nakaoka, S,
Tanaka, M,
Ochiai, S,
Sugano, M,
...
Microscopic fracture of filaments and its relation to the critical current under bending deformation in (Bi,Pb)(2)Sr2Ca2CU3O10 composite superconducting tapes (2003)
Hojo, M,
Nakamura, M,
Matsuoka, T,
Tanaka, M,
Ochiai, S,
Sugano, M,
...
Fracture of filaments and its influence on critical current and residual strength of fatigued Nb-Ti/Cu superconducting composite (2003)
Ochiai, S,
Oki, Y,
Sekino, F,
Hojo, M,
Tanaka, M,
Okuda, H,
...
Tensile damage and its influence on the critical current of Bi2223/Ag superconducting composite tape (2003)
Ochiai, S,
Nagai, T,
Okuda, H,
Oh, SS,
Hojo, M,
Tanaka, M,
...
Deformation and fracture behavior of notched and unnotched unidirectional C/C-Mg composite with Young's modulus 520 GPa and tensile strength 1 GPa (2003)
Ochiai, S,
Okuda, H,
Suzuki, N,
Tanaka, M,
Hojo, M,
Tsushima, E
Fatigue-damage evolution and damage-induced reduction of critical current of a Nb3Al superconducting composite (2003)
Ochiai, S,
Sekino, F,
Sawada, T,
Ohno, H,
Hojo, M,
Tanaka, M,
...
Mode I and II delamination fatigue crack growth behavior of alumina fiber/epoxy laminates in liquid nitrogen (2002)
Hojo, M,
Matsuda, S,
Fiedler, B,
Kawada, T,
Moriya, K,
Ochiai, S,
...
Deformation and fracture behavior of an Al2O3/YAG composite from room temperature to 2023 K (2001)
Ochiai, S,
Ueda, T,
Sato, K,
Hojo, M,
Waku, Y,
Nakagawa, N,
...
Joining characteristics of oxidized SiC particles reinforced Al-Mg matrix composite prepared by reaction infiltration processing (2001)
Shi, ZL,
Ochiai, S,
Hojo, M,
Lee, J,
Gu, MY,
Lee, H
The oxidation of SiC particles and its interfacial characteristics in Al-matrix composite (2001)
Shi, ZL,
Ochiai, S,
Hojo, M,
Lee, J,
Gu, MY,
Lee, H,
...
Effect of interface control on fracture behavior of woven C/C composites (2001)
Hojo, M,
Yamao, T,
Tanaka, M,
Ochiai, S,
Iwashita, N,
Sawada, Y
Mode II interlaminar properties under static and fatigue loadings for CF/epoxy laminates with different fiber-surface treatment (2001)
Hojo, M,
Matsuda, S,
Ochiai, S,
Tsujioka, N,
Nakanishi, Y,
Maekawa, Z,
...
Effects of interface control and heat-treatment temperature on interlaminar shear strength and mode II Interlaminar fracture toughness of woven C/C composites (2001)
Hojo, M,
Yamao, T,
Tanaka, M,
Ochiai, S,
Iwashita, N,
Sawada, Y
Effect of interface control on mode I interlaminar fracture toughness of woven C/C composite laminates (2001)
Hojo, M,
Yamao, T,
Tanaka, M,
Ochiai, S,
Iwashita, N,
Sawada, Y
Observation and analysis of fracture process of fiber, matrix and interface in UD Si-Ti-C-O fiber-bonded composite (2001)
Tanaka, M,
Ochiai, S,
Hojo, M,
Ishikawa, T,
Kajii, S,
Matsunaga, K,
...
Differences and similarities in fatigue behaviour and its influences on critical current and residual strength between Ti-Nb and Nb3Al superconducting composite wires (2000)
Ochiai, S,
Oki, Y,
Sekino, F,
Ohno, H,
Hojo, M,
Moriai, H,
...
Fracture behavior of notched unidirectional Si-Ti-C-O/BMAS composite (2000)
Ochiai, S,
Okumura, I,
Tanaka, M,
Hojo, M,
Sato, M,
Tamura, M,
...
Fracture and damping of ionomer interleaved epoxy composites (2000)
Akimoto, A,
Shonaike, GO,
Usui, Y,
Aoki, Y,
Murakami, A,
Matsuda, S,
...
Fracture behavior of notched unidirectional Si-Ti-C-O/BMAS composite (2000)
Ochiai, S,
Okumura, I,
Tanaka, M,
Hojo, M,
Sato, M,
Tamura, M,
...
Monte Carlo simulation of tensile fracture behavior of unidirectional fiber reinforced brittle matrix composite with weak interface (2000)
Ochiai, S,
Fujita, T,
Tanaka, M,
Hojo, M,
Tanaka, R,
Miyamura, K,
...
Differences and similarities in fatigue behaviour and its influences on critical current and residual strength between Ti-Nb and Nb3Al superconducting composite wires (2000)
Ochiai, S,
Oki, Y,
Sekino, F,
Ohno, H,
Hojo, M,
Moriai, H,
...
Degradation Mechanism of SiC/Super Alpha 2 Composite Due to Interfacial Reaction (1999)
Ochiai, S.,
Inoue, T.,
Fujita, T.,
Hojo, M.,
Dudek, H.J.,
Leucht, R.
Influences of distribution of fiber strength and residual stresses on tensile strength of SiC fiber-reinforced TiA1 matrix composites (1999)
Ochiai, S,
Fujita, T,
Tanaka, M,
Hojo, M,
Tanaka, R,
Miyamura, K,
...
Remote Monitoring of Daily Activities and Behaviors at Home (1998)
Ogawa, M.,
Ochiai, S.,
Otsuka, K.,
Togawa, T.
In maintaining the health of people, both elderly and younger, it can be useful to monitor their health status through their daily routines in their own home. This paper reports on the remote...
Mechanical Properties of TiAl and (TiAl+Ti3Al) Alloys Produced by Mechanical Alloying. (1998)
Ochiai, S.,
Kobayashi, M.,
Michimura, K.
Two representative titanium aluminides containing 48 and 52 at. pct Al were produced by a mechanical alloying (MA) process for the purpose of attaining fine microstructures. For the MA apparatus, an...
Multiple Cracking of a Coating Layer and Its Influence on Fibre Strength. Part I. Calculation of the Energy Release Rate of the Fibre at Cracks for Non-Uniform Crack Spacing. (1998)
Ochiai, S.,
Hojo, M.
A calculation method to describe the influence of the non-uniform crack-spacing in a strongly adhering coating layer, which shows multiple cracking, on the energy release rate of a coated fiber is...
Multiple Cracking of a Coating Layer and Its Influence on Fibre Strength. Part II. Monto Carlo Simulation. (1998)
Ochiai, S.,
Hojo, M.
Multiple cracking of a coating layer and its influence on the tensile strength of the coated fibre in the case of strong interfacial bonding were simulated by means of a monte carlo method. within...
Influence of Loading-Unloading Treatment at Room Temperature on Critical Current of Bronze-Processed Nb3Sn Superconducting Composites. (1998)
Ochiai, S.,
Osamura, K.
This paper concerned mmc in some important way and contained information about, utilized, or discussed these subjects: basic topics:, data, experimental, mmc, mmc data, theoretical materials and...
SUPERPLASTIC PHENOMENA OF FINE TIC AND TIN DISPERSED TI-6AL-4V ALLOY COMPOSITES. (1998)
Ochiai, S.,
Kobayashi, M.,
Funami, K.
Advanced Materials 93, Part B: Composites, Grain Boundaries and Nanophase Materials; Edited by M. Sakai, et al; Elsevier Science B.V. : The Netherlands
Chlorine monoxide radiometer intercomparison in Ny-Alesund, 1997 (1998)
Klein, U.,
Franke, B.,
Langer, J.,
Raffalski, U.,
Sinnhuber, B.M.,
Künzi, K.F.,
...
Harris, N.R.P. [Hrsg.]
Identification of intermediately virulent Rhodococcus equi isolates from pigs.
Takai, S,
Fukunaga, N,
Ochiai, S,
Imai, Y,
Sasaki, Y,
Tsubaki, S,
...
We recently reported the existence of Rhodococcus equi isolates with at least three virulence levels, isolated from AIDS patients: virulent R. equi having 15- to 17-kDa antigens that kills mice with...
Identification of intermediately virulent Rhodococcus equi isolates from pigs.
Takai, S,
Fukunaga, N,
Ochiai, S,
Imai, Y,
Sasaki, Y,
Tsubaki, S,
...
We recently reported the existence of Rhodococcus equi isolates with at least three virulence levels, isolated from AIDS patients: virulent R. equi having 15- to 17-kDa antigens that kills mice with...
大正十一年縣下流行ノ「コレラ」菌並ニ「エルトール」菌ニ就テ
山口, 金治,
永井, 舜二,
海野, 幸胤,
落合, 貞俊,
Yamaguchi, K.,
Nagai, S.,
...
余等ハ「エルトール」菌、並ニ大正十一年菌、及舊菌株ヲ使用シ、此等「コレラ」菌株ハ壁島氏ノ所謂ル原型異型ニ分類シ得ルヤ否ヤヲ實驗シタル...