1. Orbit determination by genetic algorithm and application to GEO observation

    Advances in Space Research 53(3):532 (2014)

    This paper demonstrates an initial orbit determination method that solves the problem by a genetic algorithm using two well-known solutions for the Lambert’s problem: universal variable method and Battin method. This paper also suggests an intuitive error evaluation method in terms of ...
  2. Orbit determination by genetic algorithm and application to GEO observation

    Advances in Space Research 53(3):532 (2014)

    This paper demonstrates an initial orbit determination method that solves the problem by a genetic algorithm using two well-known solutions for the Lambert’s problem: universal variable method and Battin method. This paper also suggests an intuitive error evaluation method in terms of ...
  3. Orbit determination by genetic algorithm and application to GEO observation

    Advances in Space Research (2013)

    This paper demonstrates an initial orbit determination method that solves the problem by a genetic algorithm using two well-known solutions for the Lambert’s problem: universal variable method and Battin method. This paper also suggests an intuitive error evaluation method in terms of ...
  4. Strong coupling between 4f valence instability and 3d ferromagnetism in Yb(x)Fe4Sb12 studied by resonant x-ray emission spectroscopy.

    Physical Review Letters 107(17):177203 (2011) PMID 22107574

    We have investigated the temperature and pressure dependency of the electronic structure of Yb-filled skutterudites, YbFe(4)Sb(12) and Yb(0.88)Fe(4)Sb(12), using x-ray absorption and emission spectroscopies. An anomalous increase of the Yb valence, which is beyond the conventional Anderson model...
  5. Strong coupling between 4f valence instability and 3d ferromagnetism in Yb(x)Fe4Sb12 studied by resonant x-ray emission spectroscopy.

    Physical Review Letters 107(17):177203 (2011) PMID 22107574

    We have investigated the temperature and pressure dependency of the electronic structure of Yb-filled skutterudites, YbFe(4)Sb(12) and Yb(0.88)Fe(4)Sb(12), using x-ray absorption and emission spectroscopies. An anomalous increase of the Yb valence, which is beyond the conventional Anderson model...
  6. Observation of resonance structures in 4d photoionization of Eu+

    Journal of Electron Spectroscopy and Related Ph... 144:71 (2005)

    The relative photoion yield in the 4d photoionization of Eu + has been measured with an energy resolution of E / Δ E ≃ 820 . The obtained spectrum shows that the 4d ‘giant resonance’ of Eu + is not a single...
  7. Observation of resonance structures in 4d photoionization of Eu+

    Journal of Electron Spectroscopy and Related Ph... 144:71 (2005)

    The relative photoion yield in the 4d photoionization of Eu + has been measured with an energy resolution of E / Δ E ≃ 820 . The obtained spectrum shows that the 4d ‘giant resonance’ of Eu + is not a single...
  8. Structure in the early afterglow light curve of the gamma-ray burst of 29 March 2003.

    Nature 423(6942):843 (2003) PMID 12815423

    Gamma-ray bursts (GRBs) are energetic explosions that for 0.01-100 s are the brightest gamma-ray sources in the sky. Observations of the early evolution of afterglows are expected to provide clues about the nature of the bursts, but their rapid fading has hampered such studies; some recent rapid...
  9. Structure in the early afterglow light curve of the gamma-ray burst of 29 March 2003.

    Nature 423(6942):843 (2003) PMID 12815423

    Gamma-ray bursts (GRBs) are energetic explosions that for 0.01-100 s are the brightest gamma-ray sources in the sky. Observations of the early evolution of afterglows are expected to provide clues about the nature of the bursts, but their rapid fading has hampered such studies; some recent rapid...
  10. The structure of colloidal alloy crystals revealed by ultra-small-angle neutron scattering

    Colloids and Surfaces A: Physicochemical and En... 190(1):17 (2001)

    We investigated the structure of colloidal crystals in binary colloidal dispersion by the ultra-small-angle neutron scattering (USANS) technique. The mixed dispersion of deutrated polystyrene latex ( d-PS) and hydrogenated polystyrene latex ( h-PS) dispersions (the size ratio ...
  11. The structure of colloidal alloy crystals revealed by ultra-small-angle neutron scattering

    Colloids and Surfaces A: Physicochemical and En... 190(1):17 (2001)

    We investigated the structure of colloidal crystals in binary colloidal dispersion by the ultra-small-angle neutron scattering (USANS) technique. The mixed dispersion of deutrated polystyrene latex ( d-PS) and hydrogenated polystyrene latex ( h-PS) dispersions (the size ratio ...
  12. Colloidal crystal alloy structure of binary dispersions of polystyrene and poly(methylmethacrylate) latices by ultra-small-angle X-ray scattering

    Studies in Surface Science and Catalysis 132:289 (2001)

    We have performed a systematic investigation of the colloidal crystal formation with the ultra-small-angle X-ray scattering (USAXS) technique. We estimated the distribution of poly(methylmethacrylate) (PMMA) latex particles in the binary colloidal dispersion of PMMA latex and polystyre...
  13. Synthesis and micelle formation of fluorine-containing block copolymers

    Studies in Surface Science and Catalysis 132:61 (2001)

    Fluorine-containing block copolymers composed of polyś 2-(2,2,3,3,3-pentafluoropropoxy)ethyl vinyl ether) (polyPFPOVE) and poly(2-hydroxyethyl vinyl ether) (polyHOVE) were synthesized and their micelle formation in water was investigated. The block copolymers were prepared by sequentia...
  14. Nanostructure and dynamics of polymers at the interfaces by neutron and x-ray reflectometry

    Studies in Surface Science and Catalysis 132:439 (2001)

    X-ray reflectivity (XR) and neutron reflectivity (NR) are highly powerful techniques for the study of surface, interface, thin films, and adsorbed layers at the interfaces. The chapter investigates the nanostructure of amphiphilic polymer monolayer on water by XR. It applies NR to the ...
  15. Synthesis and micelle formation of fluorine-containing block copolymers

    Studies in Surface Science and Catalysis 132:61 (2001)

    Fluorine-containing block copolymers composed of polyś 2-(2,2,3,3,3-pentafluoropropoxy)ethyl vinyl ether) (polyPFPOVE) and poly(2-hydroxyethyl vinyl ether) (polyHOVE) were synthesized and their micelle formation in water was investigated. The block copolymers were prepared by sequentia...
  16. Nanostructure and dynamics of polymers at the interfaces by neutron and x-ray reflectometry

    Studies in Surface Science and Catalysis 132:439 (2001)

    X-ray reflectivity (XR) and neutron reflectivity (NR) are highly powerful techniques for the study of surface, interface, thin films, and adsorbed layers at the interfaces. The chapter investigates the nanostructure of amphiphilic polymer monolayer on water by XR. It applies NR to the ...
  17. The significant information for colloidal crystal formation revealed by ultra-small-angle synchrotron X-ray and neutron scattering

    Colloids and Surfaces A: Physicochemical and En... 174(1):99 (2000)

    Colloidal crystals are formed in dispersions at very low ionic strengths. Various techniques have been used to study the mechanism of colloidal crystal formation, such as the ultra-small-angle technique, whose usefulness has been demonstrated previously. Recently, the use of ultra-small-ang...
  18. The mystery of colloidal crystal formation — novel aspects obtained by ultra-small-angle X-ray scattering

    Colloids and Surfaces A: Physicochemical and En... 174(1):79 (2000)

    We describe our recent ultra-small-angle X-ray (USAXS) data for the structure of colloidal crystals. Information on the three dimensional ‘bulk’ structure of colloidal crystals can be obtained using USAXS, and the interparticle distance estimated from the Bragg peak in the USAXS profile sho...
  19. The significant information for colloidal crystal formation revealed by ultra-small-angle synchrotron X-ray and neutron scattering

    Colloids and Surfaces A: Physicochemical and En... 174(1):99 (2000)

    Colloidal crystals are formed in dispersions at very low ionic strengths. Various techniques have been used to study the mechanism of colloidal crystal formation, such as the ultra-small-angle technique, whose usefulness has been demonstrated previously. Recently, the use of ultra-small-ang...
  20. The mystery of colloidal crystal formation — novel aspects obtained by ultra-small-angle X-ray scattering

    Colloids and Surfaces A: Physicochemical and En... 174(1):79 (2000)

    We describe our recent ultra-small-angle X-ray (USAXS) data for the structure of colloidal crystals. Information on the three dimensional ‘bulk’ structure of colloidal crystals can be obtained using USAXS, and the interparticle distance estimated from the Bragg peak in the USAXS profile sho...