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Shocks and Spatial Regime Fades in Spain's International Migration Distribution
(Blackwell Publishing Ltd, 2016-12-01)
Using an exploratory space-time analysis called spMorph, this article explores how the spatial distribution of international migration across the Spanish provinces has evolved over the period 1998-2010. The chief advantage ...
Transnational activities of Colombians in the US A qualitative exploration of the migration-development nexus
(Emerald Group Publishing Ltd., 2016-01-01)
Purpose - This paper aims to analyse the transnational activities of Colombian migrants in the USA; the reasons why migrants engage, or not, in these activities; and the impact of migrants' transnational activities at the ...
Laguerre-gauss filters in reverse time migration image reconstruction
(Sociedade Brasileira de Geofisica, 2017-01-01)
Reverse time migration (RTM) solves the acoustic or elastic wave equation by means of the extrapolation from source and receiver wavefield in time. A migrated image is obtained by applying a criteria known as imaging ...
Shocks and spatial regime fades in Spain¿s international migration distribution
(Blackwell Publishing Ltd, 2016-05-01)
A theoretical framework for glocalisation of labour migration
(2008-01-01)
Los enfoques tradicionales de la migración han teorizado a los migrantes como un factor de producción. Este es un factor motivado por las expectativas humanas y psicológicas que responden a las diferencias en los niveles ...
Analysis of the stability and dispersion for a Riemannian acoustic wave equation
(ELSEVIER SCIENCE INC, 2019-01-15)
The construction of images of the Earth's interior using methods as reverse time migration (RTM) or full wave inversion (FWI) strongly depends on the numerical solution of the wave equation. A mathematical expression of ...
Application of the continuous wavelet transform in the extraction of directional data on RTM imaging condition wavefields
(Ecopetrol, 2018-01-01)
Low-frequency artifacts in reverse time migration result from unwanted cross-correlation of the source and receiver wavefields at nonreflecting points along ray-paths. These artifacts can hide important details in migrated ...