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Non-uniform Recovery Guarantees for Binary Measurements and Infinite-Dimensional Compressed Sensing
L. Thesing, A. C. Hansen
Mar 06, 2021
Abstract: Due to the many applications in Magnetic Resonance Imaging (MRI), Nuclear Magnetic Resonance (NMR), radio interferometry, helium atom scattering etc., the theory of compressed sensing with Fourier transform...
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Non-uniform Recovery Guarantees for Binary Measurements and Infinite-Dimensional Compressed Sensing
L. Thesing, A. C. Hansen
Apr 23, 2021
Abstract: Due to the many applications in Magnetic Resonance Imaging (MRI), Nuclear Magnetic Resonance (NMR), radio interferometry, helium atom scattering etc., the theory of compressed sensing with Fourier transform...
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Microscopic origin of the optical processes in blue sapphire
Al2O3 changes from transparent to a range of intense colours depending on the chemical impurities present. In blue sapphire, Fe and Ti are incorporated; however, the chemical process that gives rise to the colour has long been...
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Microscopic origin of the optical processes in blue sapphire
Al2O3 changes from transparent to a range of intense colours depending on the chemical impurities present. In blue sapphire, Fe and Ti are incorporated; however, the chemical process that gives rise to the colour has long been...
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A unifying class of Skorokhod embeddings
We consider the Skorokhod embedding problem in Brownian motion. In particular, we give a solution based on the local time at zero of a variably skewed Brownian motion related to the underlying Brownian motion. Special cases of...
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A unifying class of Skorokhod embeddings
We consider the Skorokhod embedding problem in Brownian motion. In particular, we give a solution based on the local time at zero of a variably skewed Brownian motion related to the underlying Brownian motion. Special cases of...
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A photoactive titanate with a stereochemically active Sn lone pair
Lee A. Burton, Aron Walsh
Dec 01, 2012
TiO 2 remains the most widely studied metal oxide for photocatalytic reactions. The standard approach to reduce the band gap of titania, for increasing the absorption of visible light, is anion modification. For example the...
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A photoactive titanate with a stereochemically active Sn lone pair
Lee A. Burton, Aron Walsh
Dec 01, 2012
TiO 2 remains the most widely studied metal oxide for photocatalytic reactions. The standard approach to reduce the band gap of titania, for increasing the absorption of visible light, is anion modification. For example the...
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Automated procedure to determine the thermodynamic stability of a material and the range of chemical potentials necessary for its formation relative to competing phases and compounds
We present a simple and fast algorithm to test the thermodynamic stability and determine the necessary chemical environment for the production of a multiternary material, relative to competing phases and compounds formed from...
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Determination of the Nitrogen Vacancy as a Shallow Compensating Center in GaN Doped with Divalent Metals
We report accurate energetics of defects introduced in GaN on doping with divalent metals, focusing on the technologically important case of Mg doping, using a model that takes into consideration both the effect of hole...
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A frailty instrument for primary care
BACKGROUND: A frailty paradigm would be useful in primary care to identify older people at risk, but appropriate metrics at that level are lacking. We created and validated a simple instrument for frailty screening in Europeans...
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Achieving robustness to aleatoric uncertainty with heteroscedastic Bayesian optimisation
Abstract: Bayesian optimisation is a sample-efficient search methodology that holds great promise for accelerating drug and materials discovery programs. A frequently-overlooked modelling consideration in Bayesian optimisation...
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Bandgap engineering of ZnSnP2 for high-efficiency solar cells
D.O. Scanlon, A. Walsh
Jan 01, 0001
ZnSnP 2, an absorber material for solar cells, transitions from an ordered chalcopyrite to a disordered sphalerite structure at high temperatures. We investigate the electronic structure of both phases, combining a screened...
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Electron excess in alkaline earth sub-nitrides
A. Walsh, D.O. Scanlon
Jun 14, 2013
Alkaline earth sub-nitrides were synthesised more than five decades ago, but their potential for high-performance electronics was only recently demonstrated [Lee et al., Nature, 2013]. Based on the formal valence of the...
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Free energy of defect formation
The temperature-dependent free energies, entropies, and enthalpies for the formation of anion Frenkel pairs in In2O3 are reported, as calculated within the Mott-Littleton embedded-cluster approach, by exploiting the relationship...
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A EUROPEAN EDUCATION
Patricia Walsh
Dec 14, 2019
During the early twentieth century, a myriad of progressive movements would form in the United States to better the social status of women. These movements had rich roots in their European counterparts and often fed off the...
Automated procedure to determine the thermodynamic stability of a material and the range of chemical potentials necessary for its formation relative to competing phases and compounds
We present a simple and fast algorithm to test the thermodynamic stability and determine the necessary chemical environment for the production of a multiternary material, relative to competing phases and compounds formed from...
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<em>Ab initio</em> thermodynamic model of Cu<sub>2</sub>ZnSnS<sub>4</sub>
A.J. Jackson, A. Walsh
Jun 07, 2014
Thin-film solar cells based on the semiconductor Cu2ZnSnS4 (CZTS) are a promising candidate for terawatt-scale renewable energy generation. While CZTS is composed of earth abundant and non-toxic elements, arranged in the...
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Electron and hole stability in GaN and ZnO
We assess the thermodynamic doping limits of GaN and ZnO on the basis of point defect calculations performed using the embedded cluster approach and employing a hybrid non-local density functional for the quantum mechanical...
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Phase stability of the earth-abundant tin sulfides SnS, SnS2, and Sn2S3
L.A. Burton, A. Walsh
Nov 15, 2012
The various phases of tin sulfide have been studied as semiconductors since the 1960s and are now being investigated as potential earth-abundant photovoltaic and photocatalytic materials. Of particular note is the recent...
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<em>Ab initio</em> thermodynamic model of Cu<sub>2</sub>ZnSnS<sub>4</sub>
A.J. Jackson, A. Walsh
Jun 07, 2014
Thin-film solar cells based on the semiconductor Cu2ZnSnS4 (CZTS) are a promising candidate for terawatt-scale renewable energy generation. While CZTS is composed of earth abundant and non-toxic elements, arranged in the...
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