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Mostrando ítems 305-324 de 751

    • openAccess   Free-Motion Beam Propagation Factor Measurement by Means of a Liquid Crystal Spatial Light Modulator 

      Pérez Vizcaíno, Jorge; Mendoza-Yero, Omel; Martinez Cuenca, Raul; Martínez-León, Lluís; Tajahuerce, Enrique; Lancis, Jesús Institute of Electrical and Electronics Engineers (2012)
      In contrast to the mechanical scanning procedure described in the standard ISO/DIS 11146, the use of electronically tunable focal length lenses has proved its capability for the measurement of the laser beam propagation ...

    • openAccess   Frequency resolved wavefront retrieval and dynamics of diffractive focused ultrashort pulses 

      Alonso, Benjamín; Borrego Varillas, Rocío; Mendoza-Yero, Omel; Sola, Íñigo Juan; San Román, Julio; Mínguez-Vega, Gladys; Roso, Luis Optical Society of America (2012-08)
      In this work we demonstrate the ability of the spatiotemporal characterization technique STARFISH to retrieve the wavelength dependent wavefront of focused ultrashort laser pulses. The high resolution achievable with this ...

    • closedAccess   Frequency Stability Requirements in Quasi-Integer-Ratio Time-Expanded Phase-Sensitive OTDR 

      Soriano-Amat, Miguel; Martins, Hugo; Durán, Vicente; Fermoso, Pablo; Martin-Lopez, Sonia; Gonzalez-Herraez, Miguel; Fernández Ruiz, María del Rosario IEEE (2023-01-15)
      Time-expanded phase sensitive (TE-ϕ)OTDR is a recently reported technique for distributed fiber sensing that relies on the use of an electro-optic dual frequency comb (DFC) scheme. A distinctive feature of this approach ...

    • openAccess   From Complex Inorganic Oxides to Ag–Bi Nanoalloy: Synthesis by Femtosecond Laser Irradiation 

      Machado, Thales Rafael; Guerra Macedo, Nadia; Assis, Marcelo de; Doñate-Buendía, Carlos; Mínguez-Vega, Gladys; Teixeira, Mayara Mondego; Foggi, Camila Cristina; Vergani, Carlos; Beltrán Mir, Héctor; Andres, Juan; Cordoncillo, Eloisa; Longo, Elson American Chemical Society (2018-08-24)
      Bimetallic nanoalloys with a wide variety of structures and compositions have been fabricated through many diverse techniques. Generally, various steps and chemicals are involved in their fabrication. In this study, the ...

    • openAccess   Full-Color Stereoscopic Imaging With a Single-Pixel Photodetector 

      Salvador Balaguer, Eva; Clemente Pesudo, Pedro Javier; Tajahuerce, Enrique; Pla, Filiberto; Lancis, Jesús Institute of Electrical and Electronics Engineers (2016)
      We present an optical system for stereoscopic color imaging by using a single-pixel detector. The system works by illuminating the input scene with a sequence of microstructured light patterns generated by a color digital ...

    • openAccess   Functional marked point processes: a natural structure to unify spatio-temporal frameworks and to analyse dependent functional data 

      Ghorbani, M.; Cronie, Ottmar; Mateu, Jorge; Yu, Jun Springer (2020)
      This paper treats functional marked point processes (FMPPs), which are defined asmarked point processes where the marks are random elements in some (Polish) func-tion space. Such marks may represent, for example, spatial ...

    • openAccess   Fundamentals of automated human gesture recognition using 3D integral imaging: a tutorial 

      Javidi, Bahram; Pla, Filiberto; Martínez Sotoca, José; Shen, Xin; Latorre Carmona, Pedro; Martínez Corral, Manuel; Fernandez-Beltran, Ruben; Krishnan, Gokul Optical Society of America (2020-12-31)
      Automated human gesture recognition is receiving significant research interest, with applications ranging from novel acquisition techniques to algorithms, data processing, and classification methodologies. This tutorial ...

    • openAccess   Future Internet technologies for Environmental Applications 

      Granell, Carlos; Havlik, Denis; Schade, Sven; Sabeur, Zoheir; Delaney, Conor; Pielorz, Jasmin; Usländer, Thomas; Mazzetti, Paolo; Schleidt, Katharina; Kobernus, Mike; Havlik, Fuada; Rune Bodsberg, Nils; Berre, Arne; Mon, Jose Lorenzo Elsevier (2016)
      This paper investigates the usability of Future Internet technologies (aka “Generic Enablers of the Future Internet”) in the context of environmental applications. The paper incorporates the best aspects of the state-of-the-art ...

    • openAccess   Fuzzy-Based Time Series Forecasting and Modelling: A Bibliometric Analysis 

      Palomero, Luis; García, Vicente; Sánchez Garreta, Josep Salvador MDPI (2022-07-07)
      The purpose of this paper is to present the results of a systematic literature review regarding the development of fuzzy-based models for time series forecasting in the period 2017–2021. The study was conducted using a ...

    • openAccess   Gain-switched semiconductor lasers with pulsed excitation and optical injection for dual-comb spectroscopy 

      Quevedo-Galán, Clara; Durán, Vicente; Rosado, A.; Pérez-Serrano, A.; Garcia Tijero, Jose Manuel; Esquivias, I. Optical Society of America (2020-10-26)
      In this work we demonstrate the capability of two gain-switched optically injected semiconductor lasers to perform high-resolution dual-comb spectroscopy. The use of low duty cycle pulse trains to gain switch the lasers, ...

    • openAccess   Gait recognition from corrupted silhouettes: a robust statistical approach 

      Ortells Lorenzo, Javier; Mollineda, Ramón A.; Mederos, Boris; Martín Félez, Raúl Springer Verlag (2016-07)
      This paper introduces a method based on robust statistics to build reliable gait signatures from averaging silhouette descriptions, mainly when gait sequences are affected by severe and persistent defects. The term robust ...

    • openAccess   Gait-based Gender Classification Considering Resampling and Feature Selection 

      Martín Félez, Raúl; García, Vicente; Sánchez Garreta, Josep Salvador Engineering and Technology Publishing (2013-06)
      Two intrinsic data characteristics that arise in many domains are the class imbalance and the high dimensionality, which pose new challenges that should be addressed. When using gait for gender classification, benchmarking ...

    • openAccess   Gauss-Bonnet formulae and rotational integrals in constant curvature spaces 

      Barahona, S.; Gual-Arnau, Ximo Elsevier (2017-02)
      We obtain generalizations of the main result in [10], and then provide geometric interpretations of linear combinations of the mean curvature integrals that appear in the Gauss–Bonnet formula for hypersurfaces in space ...

    • openAccess   Gene selection and disease prediction from gene expression data using a two-stage hetero-associative memory 

      Cleofás Sánchez, Laura; Sánchez Garreta, Josep Salvador; García, Vicente Springer Verlag (2019)
      In general, gene expression microarrays consist of a vast number of genes and very few samples, which represents a critical challenge for disease prediction and diagnosis. This paper develops a two-stage algorithm that ...

    • openAccess   Generalized elastodynamic model for nanophotonics 

      Álvarez, J. V.; Djafari Rouhani, Bahram; Torrent, Daniel American Physical Society (2020)
      A self-consistent theory for the classical description of the interaction of light and matter at the nanoscale is presented, which takes into account spatial dispersion. Up to now, the Maxwell equations in nanostructure ...

    • openAccess   Generalized Linear Models for Geometrical Current predictors. An application to predict garment fit 

      Barahona-Albiol, Sònia; Centella, P.; Gual-Arnau, Ximo; Ibáñez Gual, Maria Victoria; Simó, Amelia SAGE Publications (2019)
      The aim of this paper is to model an ordinal response variable in terms of vector-valued functional data included on a vector-valued RKHS. In particular, we focus on the vector-valued RKHS obtained when a geometrical ...

    • closedAccess   Generation of multifocal irradiance patterns by using complex Fresnel holograms 

      Mendoza-Yero, Omel; Carbonell Leal, Miguel; Mínguez-Vega, Gladys; Lancis, Jesús Optical Society of America (2018)
      We experimentally demonstrate Fresnel holograms able to produce multifocal irradiance patterns with micrometric spatial resolution. These holograms are assessed from the coherent sum of multiple Fresnel lenses. The utilized ...

    • openAccess   Generation of programmable 3D optical vortex structures through devil’s vortex-lens arrays 

      Calabuig Barroso, Alejandro; Sánchez Ruiz, Sergio; Martínez-León, Lluís; Tajahuerce, Enrique; Fernández Alonso, Mercedes; Furlan, Walter; Monsoriu, Juan A.; Pons Martí, Amparo The Optical Society (OSA) (2013-08)
      Different spatial distributions of optical vortices have been generated and characterized by implement- ing arrays of devil’s vortex lenses in a reconfigurable spatial light modulator. A simple design procedure assigns the ...

    • openAccess   Geometric analysis of planar shapes with applications to cell deformations 

      Gual-Arnau, Ximo; Herold-García, Silena; Simó, Amelia International Society for Stereology (2015-07)
      Shape analysis is of great importance in many fields such as computer vision, medical imaging, and computational biology. In this paper we focus on a shape space in which shapes are represented by means of planar closed ...

    • openAccess   Geometric approach to non-relativistic quantum dynamics of mixed states 

      Gimeno, Vicent; Martínez Sotoca, José AIP Publishing LLC (2013-05)
      In this paper we propose a geometrization of the non-relativistic quantum mechanics for mixed states. Our geometric approach makes use of the Uhlmann's principal fibre bundle to describe the space of mixed states and as a ...