S. González

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In this chapter the fundamentals of the Finite Difference Time Domain (FDTD) method to solve Maxwell’s curl equations in the time domain are given in a concise operational form. The Perfectly Matched Layer truncation techniques are explained, together with the connection between the split and the Maxwellian formulation, both for the E–H and for the(More)
which arise when some spatial discretization of time–dependent partial differential equations (PDEs), especially of Advection Diffusion Reaction type, is made by following standard techniques (Finite Differences, Finite Elements, etc). To cope with the presence of stiffness, the time integration is based on the two-stage Runge-Kutta Radau IIA scheme, which(More)
The charge-coupled device camera of the TJ-II Thomson scattering (TS) can capture five different classes of images. Typically, different data processing is performed depending on the kind of image that is acquired. The procedure can be automated to recognize the type of image. To this end, machine learning methods (MLM) are applied. However, usually, MLM(More)
Recently, surveying large areas in an automatic way, for early detection of both harmful chemical agents and forest fires, has become a strategic objective of defence and public health organisations. The Lidar and Dial techniques are widely recognized as a cost-effective alternative to monitor large portions of the atmosphere. To maximize the effectiveness(More)
Cognitive impairment is the main cause of disability in developed societies. New interactive technologies help therapists in neurorehabilitation in order to increase patients' autonomy and quality of life. This work proposes Interactive Video (IV) as a technology to develop cognitive rehabilitation tasks based on Activities of Daily Living (ADL). ADL(More)
Support vector machines (SVM) are machine learning tools originally developed in the field of artificial intelligence to perform both classification and regression. In this paper, we show how SVM can be used to determine the most relevant quantities to characterize the confinement transition from low to high confinement regimes in tokamak plasmas. A set of(More)
All the pixels of an image do not contain the same amount of information. Typically, the borders of an image contain less information than the centre. This paper introduces a methodology to locate the most relevant regions in images. A relevant region is a set of pixels that contains suitable information to recognise an image class versus the rest. To(More)
In this paper a control algorithm is proposed, which provides positive signals to the propeller inputs of a 3 degrees of freedom arm-helicopter system, in consequence the propellers spin only in one direction. The originality of this paper in reference to similar papers, is the fact that preview control algorithms are designed to allow propeller spin in(More)
Big physics experiments can collect terabytes (even petabytes) of data under continuous or long pulse basis. The measurement systems that follow the temporal evolution of physical quantities translate their observations into very large time-series data and video-movies. This article describes a universal and automatic technique to recognize and locate(More)