Results 311 to 320 of about 728,963 (352)

Analog Electron Physics. Interaction Cross-Sections

2001
The aim of the present communication is to describe briefly the physics of electron interactions in matter and its implementation in general-purpose Monte Carlo (MC) simulation codes. We shall limit ourselves to moderately high energies, say above 1 keV.
S. Segui, Francesc Salvat, José M. Fernández-Varea   +2 more
openaire   +2 more sources

On Raman scattering cross section ratio of crystalline and microcrystalline to amorphous silicon

Applied Physics Letters, 2018
In this letter, we report on accurate comparative measurements of Raman scattering from bulk crystalline Si and from hydrogenated amorphous Si thin films before and after their pulse laser annealing, performed for the purpose of Si crystalline grain ...
D. Zhigunov, G. Kamaev, P. Kashkarov, V. Volodin   +3 more
semanticscholar   +1 more source

MENOPAUSE AND PHYSICAL PERFORMANCE – A COMMUNITY BASED CROSS-SECTIONAL STUDY

Maturitas, 2009
The aim of this study was to test whether menopause is associated with decreased physical performance and to determine the risk factors accounting for a decline in physical performance.We recruited 979 women (mean +/-SD age, 48.4 +/- 3.9 y; range, 43-57 y) from a community population in Taiwan.
Jong Ling Fuh, Fu Yi Yang, Peng-Hui Wang, Ming-Huei Cheng, Shuu Jiun Wang   +4 more
openaire   +4 more sources

Transitions in Quantum Physical Systems—Cross Section

1979
This is the fundamental chapter on scattering theory. Here the concept of transition probabilities is introduced and general formulas for the cross section are derived from the basic assumptions of quantum mechanics. In Section XIV.2, a general formula for the transition rate is obtained, which will be used in Section XIV.5 for the derivation of the ...
openaire   +2 more sources

The physical optics radar cross section of an elliptic cone

IEEE Transactions on Antennas and Propagation, 1987
The physical optics approximation is used to evaluate the backseattering radar cross section of a semi-infinite metallic elliptic cone. The resulting formula can be directly interpreted as a generalization Of the well-known formula for the baekscattering cross section of a circular cone. In addition the bistatic radar cross section of the elliptic cone
G. Kahl, S. Blume
openaire   +2 more sources

Neutron Scatter Physics and Differential Cross Sections

2012
Abstract This chapter examines the details of neutron scatter physics. First, the inverse relation between the line width and lifetime of a nuclear excited state is considered, followed by the derivation of the Breit-Wigner equation for neutron scatter and absorption.
openaire   +2 more sources

Automatic estimation of the physical characteristics of tibia cross-sections

Proceedings of the Second Joint 24th Annual Conference and the Annual Fall Meeting of the Biomedical Engineering Society] [Engineering in Medicine and Biology, 2002
A two-step automatic image segmentation procedure was developed to segment a large database of mouse tibia cross-sections. The resulting binary images were used to calculate physical parameters of the cortical region of the specimen.
T. C. Lang, J.P. Stitt, Neil Sharkey
openaire   +2 more sources

Cross-sectional study of physical activity in adults with achondroplasia

Advances in Rare Diseases, 2014
Background: Obesity is a leading cause of cardiovascular disease mortality in the US population, and adequate physical activity has been shown to improve health outcomes for obese patients. The purpose of this study was to demonstrate the utility of accelerometry to quantify physical activity in people with achondroplasia, the most common short stature
Celide B. Koerner, Julie Hoover-Fong, Bobbie Henry, John McGready, Kerry Schulze, Yewande Alade, Dlugash R   +6 more
openaire   +2 more sources

Physical Interpretation of Glory Undulations in Scattering Cross Sections

The Journal of Chemical Physics, 1972
The physical interpretation of the spacing of glory undulations as a function of energy is approached through the interpretation of the coefficients in a semiclassical expansion in the relative kinetic energy of the form (a1 − A1 K−1+ A2K−2+ ··· ). The coefficient a1 measures the area of the intermolecular potential well along the glory trajectory ...
Edward A. Mason, E. F. Greene
openaire   +2 more sources

Formula for Proton-Nucleus Reaction Cross Section at Intermediate Energies and Its Application(Nuclear physics)

, 2006
We construct a formula for proton–nucleus total reaction cross section as a function of the mass and neutron excess of the target nucleus and the proton incident energy.
K. Iida, A. Kohama, K. Oyamatsu
semanticscholar   +1 more source