The Experts below are selected from a list of 252 Experts worldwide ranked by ideXlab platform
Severine Humbert - One of the best experts on this subject based on the ideXlab platform.
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Small-Angle X-Ray Scattering intensity of multiscale models of spheres
Journal of Applied Crystallography, 2019Co-Authors: Loïc Sorbier, Maxime Moreaud, Severine HumbertAbstract:The different approaches found in literature to compute small angle X-Ray Scattering intensities of stochastic Boolean models from their analytical formulations or their numerical realizations are reviewed. The advantages and drawbacks of the methods for the interpretation of small angle X-Ray Scattering curves are investigated. Examples of multiscale models built from union and intersection of Boolean models of spheres and from Gamma or log-normal radius distribution are given. The scattered intensity computed from projections of realizations of such models are compared with the intensity computed from their analytical covariance. It appears that computation from projection induces strong finite size effect with a relative variance constant and equal to 0.5. Comparison of Scattering intensities of an intersection of Boolean model and the corresponding Cox model shows only subtle differences.
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Small-Angle X-Ray Scattering intensity of multiscale models of spheres
Journal of Applied Crystallography, 2019Co-Authors: Loïc Sorbier, Maxime Moreaud, Severine HumbertAbstract:The different approaches found in the literature to compute Small-Angle X-Ray Scattering intensities of stochastic Boolean models from their analytical formulations or their numerical realizations are reviewed. The advantages and drawbacks of the methods for the interpretation of Small-Angle X-Ray Scattering curves are investigated. Examples of multiscale models built from union and intersection of Boolean models of spheres and from Gamma or lognormal radius distributions are given. The Scattering intensity computed from projections of realizations of such models is compared with the intensity computed from their analytical covariance. It appears that computation from projection induces a strong finite-size effect with a relative constant variance equal to 0.5. Comparison of Scattering intensities of an intersection of Boolean model and the corresponding Cox model shows only subtle differences.
Loïc Sorbier - One of the best experts on this subject based on the ideXlab platform.
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Small-Angle X-Ray Scattering intensity of multiscale models of spheres
Journal of Applied Crystallography, 2019Co-Authors: Loïc Sorbier, Maxime Moreaud, Severine HumbertAbstract:The different approaches found in literature to compute small angle X-Ray Scattering intensities of stochastic Boolean models from their analytical formulations or their numerical realizations are reviewed. The advantages and drawbacks of the methods for the interpretation of small angle X-Ray Scattering curves are investigated. Examples of multiscale models built from union and intersection of Boolean models of spheres and from Gamma or log-normal radius distribution are given. The scattered intensity computed from projections of realizations of such models are compared with the intensity computed from their analytical covariance. It appears that computation from projection induces strong finite size effect with a relative variance constant and equal to 0.5. Comparison of Scattering intensities of an intersection of Boolean model and the corresponding Cox model shows only subtle differences.
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Small-Angle X-Ray Scattering intensity of multiscale models of spheres
Journal of Applied Crystallography, 2019Co-Authors: Loïc Sorbier, Maxime Moreaud, Severine HumbertAbstract:The different approaches found in the literature to compute Small-Angle X-Ray Scattering intensities of stochastic Boolean models from their analytical formulations or their numerical realizations are reviewed. The advantages and drawbacks of the methods for the interpretation of Small-Angle X-Ray Scattering curves are investigated. Examples of multiscale models built from union and intersection of Boolean models of spheres and from Gamma or lognormal radius distributions are given. The Scattering intensity computed from projections of realizations of such models is compared with the intensity computed from their analytical covariance. It appears that computation from projection induces a strong finite-size effect with a relative constant variance equal to 0.5. Comparison of Scattering intensities of an intersection of Boolean model and the corresponding Cox model shows only subtle differences.
Maxime Moreaud - One of the best experts on this subject based on the ideXlab platform.
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Small-Angle X-Ray Scattering intensity of multiscale models of spheres
Journal of Applied Crystallography, 2019Co-Authors: Loïc Sorbier, Maxime Moreaud, Severine HumbertAbstract:The different approaches found in literature to compute small angle X-Ray Scattering intensities of stochastic Boolean models from their analytical formulations or their numerical realizations are reviewed. The advantages and drawbacks of the methods for the interpretation of small angle X-Ray Scattering curves are investigated. Examples of multiscale models built from union and intersection of Boolean models of spheres and from Gamma or log-normal radius distribution are given. The scattered intensity computed from projections of realizations of such models are compared with the intensity computed from their analytical covariance. It appears that computation from projection induces strong finite size effect with a relative variance constant and equal to 0.5. Comparison of Scattering intensities of an intersection of Boolean model and the corresponding Cox model shows only subtle differences.
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Small-Angle X-Ray Scattering intensity of multiscale models of spheres
Journal of Applied Crystallography, 2019Co-Authors: Loïc Sorbier, Maxime Moreaud, Severine HumbertAbstract:The different approaches found in the literature to compute Small-Angle X-Ray Scattering intensities of stochastic Boolean models from their analytical formulations or their numerical realizations are reviewed. The advantages and drawbacks of the methods for the interpretation of Small-Angle X-Ray Scattering curves are investigated. Examples of multiscale models built from union and intersection of Boolean models of spheres and from Gamma or lognormal radius distributions are given. The Scattering intensity computed from projections of realizations of such models is compared with the intensity computed from their analytical covariance. It appears that computation from projection induces a strong finite-size effect with a relative constant variance equal to 0.5. Comparison of Scattering intensities of an intersection of Boolean model and the corresponding Cox model shows only subtle differences.
C. Riekel - One of the best experts on this subject based on the ideXlab platform.
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Large-scale and local-scale structures in polymer-blend films: a grazing-incidence ultra-Small-Angle X-Ray Scattering and sub-microbeam grazing-incidence Small-Angle X-Ray Scattering investigation
Journal of Applied Crystallography, 2006Co-Authors: Peter Müller-buschbaum, E. Bauer, E. Maurer, Stephan V. Roth, Rainer Gehrke, Manfred Burghammer, C. RiekelAbstract:Phase-separation structures are installed by solution casting and flow of a binary polymer-blend solution of polystyrene and poly-n-butylacrylate in toluene on silicon. Optical microscopy and scanning-probe microscopy measurements provide the surface topography. Large-scale structures are probed with high-resolution or grazing-incidence ultra-Small-Angle X-Ray Scattering enabled by high reciprocal-space resolution. Correspondingly, structures of up to 13 µm are resolved. Local-scale structures are detected with sub-microbeam grazing-incidence Small-Angle X-Ray Scattering, providing a high real-space resolution of 1 µm. Nanometre-size cavities are found in the polystyrene-rich parts of the blend film.
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A high pressure cell for small angle X-Ray Scattering
Journal De Physique Iv, 1993Co-Authors: M. Lorenzen, C. Riekel, A. Eichler, D. HäussermannAbstract:The construction of a high-pressure cell for Small-Angle X-Ray Scattering experiments is described. The cell will operate up to 10 kbar and 300 o C. It has been conceived to be used on SAXS-cameras at the European Synchrotron Radiation Facility
Hideki Matsuoka - One of the best experts on this subject based on the ideXlab platform.
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Structural analysis of coating film with ultra-Small-Angle X-Ray Scattering
Journal of Coatings Technology, 2001Co-Authors: Iwao Soga, Hideki MatsuokaAbstract:The structure of magnetic coating films was analyzed by the ultra-Small-Angle X-Ray Scattering (USAXS) technique. Small-Angle X-Ray Scattering (SAXS) has been used to investigate the size, shape, and correlation of the nm sized structure. USAXS, with a measurable range extending to the µm order, can be used to analyze the submicron sized structure of paints and coating films. Preliminary USAXS experiments for a magnetic paint and magnetic coating films revealed that USAXS is useful to evaluate the structure of the particles in the paint and the films. Combined with other experimental methods, USAXS will provide a new kind of information about the structural analysis.
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Ultra-Small-Angle X-Ray-Scattering study: preliminary experiments in colloidal suspensions.
Proceedings of the National Academy of Sciences of the United States of America, 1991Co-Authors: Hideki Matsuoka, Koji Kakigami, Norio Ise, Yuji Kobayashi, Yoshio Machitani, Tetsuo Kikuchi, Toshiyuki KatoAbstract:Abstract We report here a multiple-reflection type ultra-Small-Angle X-Ray-Scattering apparatus constructed according to the principle proposed by Bonse and Hart. The ultra-Small-Angle X-Ray Scattering technique enables us to investigate the distribution of solutes or particles in turbid systems, which could not be studied by the conventional light-Scattering and microscopic methods. By this method, the density fluctuation from an order of several thousand angstroms to several micrometers is now detectable. In this paper, the ultra-Small-Angle X-Ray Scattering apparatus was calibrated by using well-defined latex particles.