Results 11 to 20 of about 6,885 (296)

Symplectic Radon Transform and the Metaplectic Representation [PDF]

open access: yesEntropy, 2022
We study the symplectic Radon transform from the point of view of the metaplectic representation of the symplectic group and its action on the Lagrangian Grassmannian.
Maurice A. de Gosson
doaj   +4 more sources

The Radon transform of Boehmians [PDF]

open access: yesProceedings of the American Mathematical Society, 1993
The Radon transform, which enables one to reconstruct a function of N N variables from the knowledge of its integrals over ...
Mikusinski, Piotr, Zayed, Ahmed
openaire   +3 more sources

Radon Transform Based on Waveform for AVO-Preserving Data Construction

open access: yesApplied Sciences, 2021
The traditional hyperbolic Radon transform suffers from the major problem of how to both obtain a high resolution and preserve the amplitude variation with offset (AVO). In the Radon domain, high resolution (sparseness) is a valid criterion.
Shengchao Wang   +3 more
doaj   +2 more sources

Line Detection Using Radon Transform [PDF]

open access: yesEngineering and Technology Journal, 2010
To extract features from digital images, it is useful to be able to find simpleshapes (straight lines, circles, ellipses, etc.).In order to achieve this goal, one can be able to detect a group of pixels that are ona straight line or a smooth curve.
H. H. Abbas, Hussein Ali Hussein
doaj   +2 more sources

New Poisson inequality for the Radon transform of infinitely differentiable functions [PDF]

open access: yesJournal of Inequalities and Applications, 2018
Poisson inequality for the Radon transform is a key tool in signal analysis and processing. An analogue of the Hardy–Littlewood–Poisson inequality for the Radon transform of infinitely differentiable functions is proved.
Ziyao Sun
doaj   +2 more sources

Swiss national radon database: impact of building and environmental factors [PDF]

open access: yesFrontiers in Public Health
Since the 1980s, radon has been recognized as a public health concern in Switzerland and internationally. In an effort to more accurately estimate the number of lung cancer cases attributable to radon exposure, Swiss health authorities initiated the ...
Joan F. Rey   +3 more
doaj   +2 more sources

On the V-Line Radon Transform and Its Imaging Applications [PDF]

open access: yesInternational Journal of Biomedical Imaging, 2010
Radon transforms defined on smooth curves are well known and extensively studied in the literature. In this paper, we consider a Radon transform defined on a discontinuous curve formed by a pair of half-lines forming the vertical letter V.
M. Morvidone   +3 more
doaj   +2 more sources

The Radon transform on Abelian Groups

open access: yesJournal of Combinatorial Theory, Series A, 1987
Let A be a finite group and let B be a subset of A. For any function \(f: A\to {\mathbb{C}}\), one can define the function \(F_ B: A\to {\mathbb{C}}\), called the Radon transform of f with respect to B by \(F_ B(a):=\sum_{b\in B}f(ab)\). The problem we address in this note is: for which subsets B is the Radon transform invertible ?
Peter Frankl, Ronald L. Graham
openaire   +3 more sources

Long-Term Impacts of Weather Conditions on Indoor Radon Concentration Measurements in Switzerland

open access: yesAtmosphere, 2022
Radon is a natural and radioactive gas that can accumulate in indoor environments. Indoor radon concentration (IRC) is influenced, among other factors, by meteorology, which is the subject of this paper.
Joan Frédéric Rey   +5 more
doaj   +1 more source

Weather Impacts on Indoor Radon Short-Term Measurements in Switzerland

open access: yesAtmosphere, 2023
Radon is a natural and radioactively well-known carcinogenic indoor air pollutant. Since 2020, a radon short-term proactive methodology has been proposed by Swiss authorities, which aims to evaluate the probability of overpassing the national reference ...
Joan F. Rey   +2 more
doaj   +1 more source

Home - About - Disclaimer - Privacy