High-Energy Calculation of K-Shell Ejection Cross-Sections as a Function of Projectile Charge

Journals published by the American Physical Society can be found at http://publish.aps.org

Hydrogen-Atom Excitation and Ionization by Proton Impact in 50-Kev to 200-Kev Energy Region

Journals published by the American Physical Society can be found at http://publish.aps.org

Deflection Effects in Inner-Shell Ionization

Journals published by the American Physical Society can be found at http://publish.aps.org

Automatic Optimization of Alignment Parameters for Tomography Datasets

As tomographic imaging is being performed at increasingly smaller scales, the stability of the scanning hardware is of great importance to the quality of the reconstructed image. Instabilities lead to perturbations in the geometrical parameters used in the acquisition of the projections. In particular for electron tomography and high-resolution X-ray tomography, small instabilities in the imaging setup can lead to severe artifacts. We present a novel alignment algorithm for recovering the true geometrical parameters \emph{after} the object has been scanned, based on measured data. Our algorithm employs an optimization algorithm that combines alignment with reconstruction. We demonstrate that problem-specific design choices made in the implementation are vital to the success of the method. The algorithm is tested in a set of simulation experiments. Our experimental results indicate that the method is capable of aligning tomography datasets with considerably higher accuracy compared to standard cross-correlation methods

K-Shell Hole Production by Light-Ions in Region Eta 1/2 =] 1

Journals published by the American Physical Society can be found at http://publish.aps.org

Mobile TV

This article explores how mobile television is being constructed and understood, focusing on four concepts used in contemporary public debate to discuss the technology, namely 'TV in your pocket', 'TV anytime, anywhere', 'TV on the go', and 'Enhanced TV'. Drawing on an analysis of industry reports, conference proceedings, websites, academic studies, press coverage, results of trials, advertisements and expert interviews, we examine the ways in which experts involved in the production, marketing, delivery and analysis of mobile TV regard this emergent technology. It is argued that mobile TV is constructed by these experts as a novel technological and cultural experience and form, while at the same time the rhetoric of novelty is paralleled with a continuous emphasis on the new medium's relation to familiar technological worlds. The article concludes by offering an explanation for this new/old articulation of mobile TV