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Now showing items 38-57 of 109

Global oscillations in a magnetic solar model : II Oblique propagation

Pintér, Balázs; Erdélyi, R.; Goossens, M. (2007-04)

The coupling of solar global acoustic oscillations to a magnetised solar atmosphere is studied here. The solar interior - atmosphere interface is modelled by a non-magnetic polytrope interior overlayed by a planar atmosphere ...
Hamilton–Jacobi–Bellman equations for quantum optimal feedback control

Gough, John E.; Belavkin, V. P.; Smolianov, O. G. (2005)

We exploit the separation of the filtering and control aspects of quantum feedback control to consider the optimal control as a classical stochastic problem on the space of quantum states. We derive the corresponding ...
Hybrid simulation of ion cyclotron resonance in the solar wind: evolution of velocity distribution functions

Li, Xing; Habbal, Shadia Rifai (2005-10)

Resonant interaction between ions (oxygen ions O+5 and protons) and ion cyclotron waves is investigated using a one dimensional hybrid code. Ion cyclotron waves are self-consistently generated by an ion cyclotron anisotropy ...
Identifying vibrations that destabilize crystals and characterize the glassy state

Meneau, F.; Majerus, O.; Greaves, George; Jones, D. G. (2005-05-27)

High-resolution inelastic neutron scattering was used to identify major sources of low-frequency vibrations in zeolite crystals. Dispersed and nondispersed modes were found, both of which are prominent in the early stages ...
The impact of sunspots on the interpretation of coronal observations of the OVI doublet

Habbal, Shadia Rifai; Morgan, Huw (2005-08-22)

Due to their high intensity of emission in the O vi λλ1031.9 and 1037.6 lines, even small sunspots on the solar disk can strongly influence the intensity of the radiative scattering component of O vi lines in the corona. ...
Inelastic neutron scattering on sodium aluminosilicate melts: sodium diffusion and intermediate range order

Kargl, Florian; Meyer, A. (2004-11-15)

The interplay of structure and mass transport in sodium aluminosilicate melts at temperatures up to 1600 K has been investigated with inelastic neutron scattering. We compare results of ion dynamics and elastic structure ...
Inorganic glasses, glass-forming liquids and amorphizing solids

Greaves, George; Sen, S. (2007-01)

We take familiar inorganic oxide glasses and non-oxide glasses and the liquids from which they derive to review the current understanding of their atomic structure, ranging from the local environments of individual atoms ...
In-situ SAXS studies of the morphological changes of an alumina-zirconia-silicate ceramic during its formation

Le Messurier, Daniel; Winter, Rudolf; Martin, Christopher M. (2006-07)

Small-Angle X-ray Scattering (SAXS) is used at two energies, one either side of the zirconium K-edge, to probe the in-situ formation of an alumina-zirconia-silicate ceramic. The use of energies either side of the edge ...
Interaction between coronal mass ejections and the solar wind

Jones, R. A.; Breen, A. R.; Fallows, R. A.; Canals, A.; Bisi, M. M.; Lawrence, G. (2007-08)

Observations suggest that the interplanetary extensions of coronal mass ejections (iCMEs) may be accelerated or decelerated in their passage through the solar wind. Interplanetary scintillation measurements (IPS) can detect ...
Interaction between coronal mass ejections and the solar wind

Breen, Andrew; Jones, R. A.; Fallows, Richard A.; Canals, A. (American Geophysical Union, 2007-08)

Observations suggest that the interplanetary extensions of coronal mass ejections (iCMEs) may be accelerated or decelerated in their passage through the solar wind. Interplanetary scintillation measurements (IPS) can detect ...
Internal structure of copper(II)-phthalocyanine thin films on SiO2/Si substrates investigated by grazing incidence x-ray reflectometry

Jones, D. G.; Brieva, A. C.; Jenkins, Tudor; Evans, D. A. (2006-04)

The internal structure of copper(II)-phthalocyanine (CuPc) thin films grown on SiO2/Si by organic molecular beam deposition has been studied by grazing incidence x-ray reflectometry (GIXR) and atomic force microscopy. The ...
Ion Pickup by Finite Amplitude Parallel Propagating Alfven Waves

Li, Xing; Lu, Q. M.; Li, B. (2007-04-24)

Two scenarios of possible ion heating due to finite amplitude parallel propagating Alfvén waves in the solar atmosphere are investigated using a one-dimensional test particle approach. (1) A finite amplitude Alfvén wave ...
Large-scale structure of the fast solar wind

Bisi, Mario Mark; Breen, Andrew; Fallows, Richard A.; Habbal, Shadia Rifai; Jones, R. A. (2007-06-01)

We present the results of a comprehensive study of the fast solar wind near solar minimum conditions using interplanetary scintillation (IPS) data taken with the EISCAT system in northern Scandinavia, and a recent extremely ...
Laser desorption/ionization mass spectrometry on porous silicon for metabolome analyses: influence of surface oxidation

Jones, D. G.; Vaidyanathan, S.; Jenkins, Tudor; Ellis, J. (2007-07-15)

Laser desorption/ionization mass spectrometry (LDI-MS) on porous silicon is a promising analytical strategy for the rapid detection of metabolites in biological matrices. We show that both oxidized and unoxidized porous ...
Laser-heated high-temperature NMR - a time-resolution study

Jones, Aled R.; Shaw-West, Rachel N.; Winter, Rudolf; Massiot, Dominique; Florian, Pierre; Wolff, Matthias (2007-01-30)

The time resolution achievable in in-situ high-temperature nuclear magnetic resonance (NMR) experiments is investigated using laser heating of refractory materials. Three case studies using 27Al in alumina nano-particles, ...
Li+ Diffusion and its Structural Basis in the Nanocrystalline and Amorphous Forms of Two-dimensionally Ion-conducting LixTiS2

Winter, Rudolf; Heitjans, Paul (2001)

The layered fast ion conductor LixTiS2 (x ≈ 2/3) has been prepared in nanocrystalline (n-LixTiS2) and amorphous (a-LixTiS2) forms. Hence, a direct comparison of the lithium diffusion in a homogeneously and a heterogeneously ...
Limit cycles of a predator-prey model with intratrophic predation

Hill, Joe M.; Lloyd, Noel G.; Pearson, Jane M. (2008)

We present some properties of a differential system that can be used to model intratrophic predation in simple predator-prey models. In particular, for the model we determine the maximum number of limit cycles that can ...
Linear quantum feedback networks

Gough, John E.; Gohm, Rolf; Yanagisawa, Masahiro (2008-12-08)

The mathematical theory of quantum feedback networks has recently been developed [J. Gough and M. R. James, e-print arXiv:0804.3442v2] for general open quantum dynamical systems interacting with bosonic input fields. In ...
Liquid alumina: detailed atomic coordination determined from neutron diffraction data using empirical potential structure refinement

Greaves, George; Hennet, L.; Jenkins, T. E.; Landron, C. (2001)

The neutron scattering structure factor SN(Q) for a 40 mg drop of molten alumina ( Al2O3) held at 2500 K, using a laser-heated aerodynamic levitation furnace, is measured for the first time. A 1700 atom model of liquid ...
LOCALIZED ENHANCEMENTS OF Fe+10 DENSITY IN THE CORONA AS OBSERVED IN Fe xi 789.2 nm DURING THE 2006 MARCH 29 TOTAL SOLAR ECLIPSE

Johnson, Judd; Arndt, Martina Belz; Morgan, Huw; Daw, Adrian; Mickey, Don; Habbal, Shadia Rifai; Jaeggli, Sarah; Kuhn, Jeff (2007-07)

The first image of the full solar corona in the Fe XI 789.2 nm spectral line, acquired during the total solar eclipse of 29 March 2006, with a sequence of 7, 2 and 0.5 second exposures, revealed a surprisingly extended ...

Now showing items 38-57 of 109

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