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Now showing items 177-196 of 383

Large Scale 3-Dimensional Structure of the Solar Wind

Dorrian, Gareth (Aberystwyth UniversityMathematical and Physical Sciences, 2009)

This thesis discusses new observations made of large scale solar wind structure during solar minimum conditions. The phenomena of interplanetary radio scintillation (IPS) is exploited and used in conjunction with white ...
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 conductivity of nanocrystalline Li4Ti5O12 prepared by a sol-gel method and high-energy ball milling

Iwaniak, Wojciech; Fritzsche, J.; Zukalova, M.; Winter, Rudolf; Wilkening, Martin; Heitjans, Paul (2009-04)

Spinel-type structured Li4+xTi5O12 (0 6 x 6 3 ) is actually one of the most promising anode materials for Li ion batteries. In its nanostructured form it is already used in some commercially available Li ion batteries. As ...
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 ...
Linear Stability Analyses of Poiseuille Flows of Viscoelastic Liquids

Palmer, Alison (Aberystwyth UniversityMathematical and Physical Sciences, 2007)

The linear stability of the Giesekus and linear Phan-Thien Tanner (PTT) fluid models is investigated for a number of planar Poiseuille flows in single, double and triple layered configurations. The Giesekus and PTT models ...
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 ...
Liquid-liquid transitions, crystallization and long range fluctuations in supercooled yttrium oxide-aluminium oxide melts

Greaves, G. N.; Wilding, M. C.; Fearn, S.; Kargl, F.; Hennet, L.; Bras, W.; Majerus, O.; Martin, Chris M. (2009-05-01)

Employing small angle X-ray scattering (SAXS) and wide angle X-ray scattering (WAXS) combined with laser-heated aerodynamic levitation has enabled different transitions in Supercooled yttrium oxide-aluminium oxide to be ...
Local controllability of quantum networks

Burgarth, Daniel; Bose, Sougato; Bruder, Christoph; Giovannetti, Vittorio (2009)

We give a sufficient criterion that guarantees that a many-body quantum system can be controlled by properly manipulating the (local) Hamiltonian of one of its subsystems. The method can be applied to a wide range of ...
The local environment of trivalent lanthanide ions in sodium silicate glasses: A neutron diffraction study using isotopic substitution

Wilding, Martin C.; Badyal, Yaspal; Navrotsky, Alexandra (2007-12-15)

Neutron diffraction data on lanthanide-bearing sodium silicate glasses were collected using the glass, liquid and amorphous materials diffractometer (GLAD) at the intense pulsed neutron source (IPNS), Argonne. Measurements ...
Localisation and dynamic defects in lattice structures

Mishuris, G.; Movchan, A.; Slepyan, L. I. (Springer, 2009)

This review paper outlines several formulations for lattice structures where dynamic lattice Green's functions play an important role in analysis of localization near defects as well as fracture in structured media. The ...
Localised knife waves in a structured interface

Mishuris, Gennady S.; Movchan, Alexander B.; Slepyan, Leonid I. (2009-12)

We consider a Mode III lattice with an interface layer where the dynamic crack growth is caused by a localised sinusoidal wave. In the wave–fracture scenario, the ‘feeding wave’ (here also called the knife wave) delivers ...
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 ...
Local quantum control of Heisenberg spin chains

Heule, Rahel; Bruder, Christoph; Burgarth, Daniel; Stojanović, Vladimir M. (2010)

Motivated by some recent results of quantum control theory, we discuss the feasibility of local operator control in arrays of interacting qubits modeled as isotropic Heisenberg spin chains. Acting on one of the end spins, ...
Locating hexagonal and cubic phases in boron nitride using wavelength-selective optically detected x-ray absorption spectroscopy

Poolton, Nigel; Evans, Andrew; Vearey-Roberts, Alex R.; Evans, David Andrew (2006-10-17)

Cubic and hexagonal phases of boron nitride (c-BN and h-BN) have been identified and located using optically detected x-ray absorption spectroscopy (ODXAS). Each phase was identified by distinct resonance features in the ...
Macromolecular Scaffolding: The Relationship Between Nanoscale Architecture and Function in Multichromophoric Arrays for Organic Electronics

Palermo, Vincenzo; Schwartz, Erik; Finlayson, Chris E.; Liscio, Andrea; Otten, Matthijs B. J.; Trapani, Sara; Müllen, Klaus; Beljonne, David; Friend, Richard H.; Notle, Roeland J. M.; Rowan, Alan E.; Samori, Paolo (2010-02)

The optimization of the electronic properties of molecular materials based on optically or electrically active organic building blocks requires a fine-tuning of their self-assembly properties at surfaces. Such a fine-tuning ...
The magnetic structure of a coronal X-ray bright point

Golub, Leon; Brown, Daniel; DeLuca, Ed; McMullen, Rebecca; Parnell, Clare (2001)

Abstract. X-ray bright points are small dynamic loop structures that are observed all over the solar corona. The high spatial and temporal resolution of the TRACE instrument allows bright points to be studied in much greater ...

Now showing items 177-196 of 383

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