Listar Artículos (Física Aplicada I) por fecha de publicación
Mostrando ítems 1-20 de 519
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Diffusion equations for nonhomogeneous media. Existence of similarity solutions
(Elsevier, 1985)We study the invariance of the diffusion equation δP(x,t)/δt = (δ/δx)[D(x)δP(x,t)/δx] under continuous groups of transformations. We show the conditions which D(x) must satisfy for the existence of similarity solutions.
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An Easy Method for the Determination of Ra Isotopes and Actinide Alpha Emitters from the Same Water Sample
(Elsevier, 1986)Radium isotopes and actinide α emitters are easily determined from the same water sample. The Ra fraction is obtained by ...
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Diffusion in a class of exactly solvable non-harmonic potentials. Intrinsic effects induced by non-linearities
(Elsevier, 1990)This paper deals with the problem of a particle that diffuses in a potential with a reflecting barrier and has a point of ...
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Low-level radioactivity studies in the marine environment of the South of Spain
(Elsevier, 1992)In this paper preliminary levels of natural and man-made radionuclides in the South Spanish marine environment are presented. ...
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A modeling study of Ra-226 dispersion in an estuarine system in south-west Spain
(Elsevier, 1994)A numerical model to study 226Ra dispersion in the Odiel River, in which two fertilizer plants release their wastes, has ...
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Self-diffusion in freely evolving granular gases
(American Institute of Physics, 1994)A self-diffusionequation for a freely evolving gas of inelastic hard disks or spheres is derived starting from the ...
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Identification and effects of anthropogenic emissions of U and Th on the composition of sediments in a river/estuarine system in Southern Spain
(Elsevier, 1994)A study of the distribution of natural radionuclides in different fractions of river bottom sediments has been carried ...
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The distribution of U, Th and 226Ra derived from the phosphate fertilizer industries on an estuarine system in Southwest Spain
(Elsevier, 1994)This paper reports an extensive study of the presence of natural radioactivity around a phosphate fertilizer factory complex ...
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U and Th distribution in solution and suspended matter from rivers affected by the phosphate rock processing in southwestern Spain
(Elsevier, 1994)A study is presented on the distribution of U and Th isotopes in the solid and liquid fractions of waters collected along ...
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Resonant behavior of a Poisson process driven by a periodic signal
(American Physical Society, 1995)The statistical properties of the residence times of a periodically modulated Poisson process (time-dependent shot noise) ...
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Intersection of crisis loci in a driven nonlinearly damped oscillator
(Elsevier, 1995)We report on a phenomenon observed in a driven nonlinearly damped oscillator when two control parameters, the frequency ...
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U and Th speciation in river sediments
(Elsevier, 1995)A study of the distribution of some natural radionuclides in different chemical fractions of river bottom sediments has ...
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Homogeneous cooling state of a low-density granular flow
(American Physical Society, 1996)The homogeneous cooling state of a granular flow of smooth spherical particles described by the Boltzmann equation is ...
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Modelling the suspended matter distribution in an estuarine system : Application to the Odiel river in southwest Spain
(Elsevier, 1996)A numerical model which solves the advective-diffusive dispersion equation for suspended matter and includes the deposition ...
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Modelling the dispersion of non-conservative radionuclides in tidal waters—Part 1: Conceptual and mathematical model
(Elsevier, 1996)A 2D four-phase model to study the dispersion of non-conservative radionuclides in tidal waters, in conditions of ...
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Modelling the dispersion of non-conservative radionuclides in tidal waters .2. Application to Ra-226 dispersion in an estuarine system
(Elsevier, 1996)The Odiel river is an estuary system located in the south-west of Spain and affected by tidal dynamics. A phosphate ...
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U- and Th-isotopes in an estuarine system in southwest Spain: Tidal and seasonal variations
(Elsevier, 1996)The presence of U- and Th-isotopes in suspended matter from an estuarine system which surrounds a phosphate fertilizer ...
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210Pb distribution in riverwaters and sediments near phosphate fertilizer factories
(Elsevier, 1996)two fertilizer factories operate at the estuary formed by the Odiel and Tinto rivers in Southwestern Spain. In previous ...
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Anthropogenic emissions of Po-210, Pb-210 and Ra-226 in an estuarine environment
(Springer, 1996)An extensive study on the distribution of natural radionuclides in an estuarine ecosystem located in Southwestern Spain ...
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Enhanced U and Th concentrations in soils from a wet marshland washed by contaminated riverwaters
(Elsevier, 1996)A study of the presence of U and Th isotopes in soil samples from a saline wet Marshland located close to a phosphoric ...