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Mostrando ítems 471-480 de 717
Artículo
Multibreather and vortex breather stability in Klein–Gordon lattices: equivalence between two different approaches
(2011)
In this work, we revisit the question of stability of multibreather configurations, i.e. discrete breathers with multiple excited sites at the anti-continuum limit of uncoupled oscillators. We present two methods that yield ...
Artículo
Influence of layer microstructure on the double nucleation process in Cu/Mg multilayers
(American Institute of Physics, 2006)
We have investigated by differential scanning calorimetry the thermal evolution of Cu/Mg multilayers with different modulation lengths, ranging from 7/28 to 30/120 nm. The Cu and Mg layers were grown by sequential evaporation ...
Artículo
The use of 99mTc as a tracer in the determination of 99Tc by ICPmass spectrometry
(2000)
The aim of this paper is to carry out a deep study on the possibilities of using 99mTc from 99Mo-99mTc clinical isotope generators to trace the radiochemical separations for 99Tc measurements by ICP-MS. By appropriately de®ning ...
Artículo
Modelling of Glow Discharge Optical Emission Spectroscopy depth profiles of metal (Cr,Ti) multilayer coatings
(ScienceDirect, 2008-03)
The broadening effects found in the depth profiles of abrupt periodic multilayers obtained by Glow Discharge Optical Emission Spectroscopy (GDOES) have been modelled by assuming that the resulting absolute concentration ...
Artículo
Do stones modify the spatial distribution of fire induced soil water repellency? Preliminary data
(FUEGORED, 2013)
Water repellency is a property of many fire-affected soils that contributes to delayed wetting rates and shows many hydrological and geomorphological consequences. Fire-induced soil water repellency (SWR) may be modulated ...
Artículo
Assessment of natural radioactivity levels and radiation exposure in new building materials in Spain
(Oxford University Press, 2021)
Novel building materials were manufactured and analyzed for 226Ra, 232Th and 40K using an HPGe gamma-ray spectrometer. The results show that the highest value of 40K was 4530 Bq per kg which was measured in a sample ...
Artículo
Kinetic box models for the uptake of radionuclides and heavy metals by suspended particulate matter: equivalence between models and its implications
(Elsevier, 2008)
In recent years an increasing experimental effort has been paid to the study of the sorption process of radionuclides and heavy metals by particulate matter in aquatic environments. This has led to the development of ...
Artículo
Discrete breathers in a mechanical metamaterial
(American Physical Society, 2023-01)
We consider a previously experimentally realized discrete model that describes a mechanical metamaterial consisting of a chain of pairs of rigid units connected by flexible hinges. Upon analyzing the linear band structure of ...
Artículo
Modelling the atmospheric dispersion of radiotracers in small-scale, controlled detonations: validation of dispersion models using field test data
(IOP Publishing, 2022)
A series of modelling exercises, based on field tests conducted in the Czech Republic, were carried out by the ‘Urban’ Working Groups as part of the International Atomic Energy Agency’s Environmental Modelling for Radiation ...
Artículo
Depth-selective 2D-ACAR studies on low-k dielectric thin films
(ScienceDirect, 2003)
Depth-selective 2D-ACAR investigations on ordered mesoporous silica thin films provide direct evidence that para-positronium (p-Ps) created deep in the films can escape through a network of interconnected pores. The depth ...