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Now showing items 1841-1850 of 2111
A Bayesian approach to comparing theoretic models to observational data: A case study from solar flare physics
(2011)
Solar flares are large-scale releases of energy in the solar atmosphere, which are characterized by rapid changes in the hydrodynamic properties of plasma from the photosphere to the corona. Solar physicists have typically ...
Effect of Hubbard U on the construction of low-energy Hamiltonians for LaMnO(3) via maximally localized Wannier functions
(American Physical Society, 2011)
We use maximally localized Wannier functions to construct tight-binding (TB) parametrizations for the e(g) bands of LaMnO(3) based on first-principles electronic structure calculations. We compare two different ways to ...
Hemicellulose pyrolysis: mechanism and kinetics of functionalized xylopyranose
(2024)
This work analyzes the thermochemical kinetic influence of the most prominent functionalizations of the β-d-xylopyranose motif, specifically 4-methoxy, 5-carboxyl, and 2-O-acetyl, regarding the pyrolytic depolymerization ...
Angular Distribution of electron temperature and density in a laser-ablation plume
(American Physical Society, 2000)
The angular distribution of electron temperature and density in a laser-ablation plume has been studied
for the first time. The electron temperature ranges from 0.1 to 0.5 eV and is only weakly dependent on
the angle in ...
Nonlinear optical extinction in organic and inorganic nanomaterials
(Trinity College (Dublin, Ireland). School of Physics, 2007)
This thesis will focus on the nonlinear optical dissipation of high intensity
nanosecond laser irradiation by polymer-phthalocyanine films and nano-structured
dispersions. The nonlinear optical investigation of a selection ...
Compositional and Structural Characterisation of Polymer Photovoltaic Devices
Organic materials have enormous relevance in material science and have many advantages over materials such as metals, ceramics and glass due to their physical and mechanical properties. They offer a viable alternative to ...
Curing of complex monomer systems: a spectroscopic and thermal analysis
(Trinity College (Dublin, Ireland). School of Physics, 2001)
This thesis describcs the development of a novel methodology, which uses the
high resolution liquid nuclear magnetic resonance (NMR) spectroscopic technique to
continuously monitor in real time the thermal and UV-photoinitiated ...
Magnetic localization in mixed-valence manganites
(American Physical Society, 1997)
The metal-insulator transition is mixed-valence manganites of the (La0.7Ca0.3)MnO3 type is ascribed to a modification of the spin-dependent potential JHs?S associated with the onset of magnetic order at TC. Here JH is the ...
Magnetic coupling in Co Cr2 O4 and Mn Cr2 O4: An LSDA+U study
(American Physical Society, 2007)
We present a first principles LSDA+U study of the magnetic coupling constants in the spinel magnets
CoCr2O4 and MnCr2O4. Our calculated coupling constants highlight the possible importance of AA interactions
in spinel ...
Foam as a complex system
(2009)
What is a `complex system?? The two-dimensional foam, as originally popularized by Cyril
Stanley Smith, provides an ideal context in which to explore this question.