Results 71 to 80 of about 498,478 (298)

General quantum theory of Thomson scattering

open access: yesResults in Physics, 2023
It is well known that the interaction of radiation with matter can be described using classical or quantum physics in relation to three systems: incoming radiation, matter, and scattered radiation.
D.N. Makarov
doaj  

Quantification and dosimetric impact of intra‐fractional bladder changes during CBCT‐guided online adaptive radiotherapy for pelvic cancer treatments

open access: yesJournal of Applied Clinical Medical Physics, EarlyView.
Abstract Purpose This study quantitatively evaluates bladder changes and their dosimetric impact during the on‐couch adaptive process on a commercial CBCT‐based online adaptive radiotherapy (CT‐gART) platform. Methods Data from 183 fractions of ten patients receiving online ART for pelvic cancers were analyzed retrospectively.
Ingrid Valencia Lozano   +7 more
wiley   +1 more source

The Computation of the Magnitude of the Far Field for an Eccentric Circular Cylinder

open access: yesAdvances in Mathematical Physics, 2015
The specific case of scattering of a plane wave by a two-layered penetrable eccentric circular cylinder has been considered and it is about the validity of the on surface radiation condition method and its applications to the scattering of a plane wave ...
Bülent Yılmaz
doaj   +1 more source

Fast, automated optimization of virtual monoenergetic images with the dual‐energy image synthesizer for cone‐beam CT

open access: yesJournal of Applied Clinical Medical Physics, EarlyView.
Abstract Background Dual‐energy cone‐beam CT (DE‐CBCT) has become subject of recent interest due to the ability to produce virtual monoenergetic images (VMIs) with improved soft‐tissue contrast and reduced nonuniformity artifacts. However, efficient production and optimization of VMIs remains an under‐explored part of DE‐CBCT's application.
Andrew Keeler   +4 more
wiley   +1 more source

Scattered Radiation Emission Imaging: Principles and Applications [PDF]

open access: yesInternational Journal of Biomedical Imaging, 2011
Imaging processes built on the Compton scattering effect have been under continuing investigation since it was first suggested in the 50s. However, despite many innovative contributions, there are still formidable theoretical and technical challenges to overcome.
M. K. Nguyen   +3 more
openaire   +8 more sources

Resonances, radiation pressure and optical scattering phenomena of drops and bubbles [PDF]

open access: yes, 1982
Acoustic levitation and the response of fluid spheres to spherical harmonic projections of the radiation pressure are described. Simplified discussions of the projections are given.
Goosby, S. G.   +3 more
core   +1 more source

Second-Order Leptonic Radiative Corrections for Lepton-Proton Scattering

open access: yes, 2018
The interpretation of high-precision lepton-nucleon scattering experiments requires the knowledge of higher-order radiative corrections. We present a calculation of the cross section for unpolarized lepton-proton scattering including leptonic radiative ...
Bucoveanu, R. -D., Spiesberger, H.
core   +1 more source

Combined Natural Convection and Radiation Heat Transfer of Various Absorbing-Emitting-Scattering Media in a Square Cavity

open access: yesAdvances in Mechanical Engineering, 2014
A numerical model is developed to simulate combined natural convection and radiation heat transfer of various anisotropic absorbing-emitting-scattering media in a 2D square cavity based on the discrete ordinate (DO) method and Boussinesq assumption.
Xianglong Liu   +2 more
doaj   +1 more source

Optimal backward light scattering by dipolar particles

open access: yesPhysical Review Research, 2020
The near-zero forward intensity condition for light scattering by a dielectric dipolar sphere is usually associated with the generalized second Kerker condition, at which equal amplitude electric and magnetic dipolar responses are phase-shifted by π.
Jorge Olmos-Trigo   +4 more
doaj   +1 more source

Scattering characteristics of antennas in cyberspace

open access: yes工程科学学报, 2020
5G network technology can meet the high requirements of cyberspace development in the performance of communication platforms. Massive MIMO (multiple-input multiple-output) antenna array is one of the core technologies of 5G. The mutual coupling effect of
Jian-zhong CHAI   +4 more
doaj   +1 more source

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