• openAccess   Parallel laser micromachining based on diffractive optical elements with dispersion compensated femtosecond pulses 

      Torres Peiró, Salvador; González Ausejo, Jennifer; Mendoza-Yero, Omel; Mínguez-Vega, Gladys; Andrés, Pedro; Lancis, Jesús Optical Society of America (2013)
      We experimentally demonstrate multi-beam high spatial resolution laser micromachining with femtosecond pulses. The effects of chromatic aberrations as well as pulse stretching on the material processed due to diffraction ...
    • openAccess   Spectral–Spatial Pixel Characterization Using Gabor Filters for Hyperspectral Image Classification 

      Rajadell Rojas, Olga; García-Sevilla, Pedro; Pla, Filiberto Institute of Electrical and Electronics Engineers (IEEE) (2013)
      This paper presents a spectral-spatial pixel characterization method for hyperspectral images. The characterization is based on textural features obtained using Gabor filters over a selected set of spectral bands. This ...
    • openAccess   Diffractive digital lensless holographic microscopy with fine spectral tuning 

      Mendoza-Yero, Omel; Tajahuerce, Enrique; Lancis, Jesús; García Sucerquia, Jorge Optical Society of America (2013)
      We experimentally demonstrate an all-diffractive optical setup for digital lensless holographic microscopy with easy wavelength line selection and micrometric resolution. In the proposed system, an ultrashort laser pulse ...
    • openAccess   Reply to Townsend et al.: Decoupling contributions from canopy structure and leaf optics is critical for remote sensing leaf biochemistry (Letter) 

      Latorre Carmona, Pedro; Knyazikhin, Yuri; Lewis, Philip; Disney, Mathias I.; Stenberg, Pauline; Mõttus, Matti; Rautiainen, Miina; Kaufmann, Robert K.; Marshak, Alexander; Schull, Mitchell A.; Vanderbilt, Vern; Davis, Anthony B.; Baret, Frédéric; Jacquemoud, Stéphane; Lyapustin, Alexei; Yang, Yan; Myneni, Ranga B. National Academy of Sciences (2013)
      Townsend et al. (1) agree that we explain the observed relationship (2) between foliar nitrogen (%N) and near-infrared (NIR) canopy reflectance is largely due to structure - i.e., structural variation due to fraction of ...
    • openAccess   Femtosecond filamentation in sapphire with diffractive lenses 

      Borrego Varillas, Rocío; Romero, Carolina; Mendoza-Yero, Omel; Mínguez-Vega, Gladys; Gallardo, I.; Vázquez de Aldana, Javier R. Optical Society of America (2013)
      In this paper, we demonstrate novel properties in the phenomenology of supercontinuum generation in sapphire with diffractive lenses and provide a complete spatial, spectral, and temporal characterization of the so-generated ...
    • closedAccess   Percentage Points of a Test Statistic Useful in Manova with Structured Covariance Matrices 

      Gupta, Arjun K.; Nagar, Daya K.; Mateu, Jorge; Rodríguez-Cortés, Francisco Javier Nova Science Publishers (2013)
      The exact distribution of a test statistic ΛH for testing equality of mean vectors of m p-variate Gaussian populations having compound symmetry has been derived using inverse Mellin transform, calculus of residues and ...
    • closedAccess   Shape description from generalized support functions 

      Gual-Arnau, Ximo; Simó, Amelia; Herold-García, Silena Elsevier (2013)
      The generalized support function is considered to be a representation of shape properties of compact connected sets in R2. Some interesting properties are studied and several parameters are defined for use in shape description ...
    • openAccess   Enhancing integrated environmental modelling by designing resource-oriented interfaces 

      Granell, Carlos; Díaz Sánchez, Laura; Schade, Sven; Ostländer, Nicole; Huerta, Joaquin Elsevier (2013)
      Integrated environmental modelling is gaining momentum for addressing grand scientific challenges such as monitoring the environment for change detection and forecasting environmental conditions along with the consequences ...
    • openAccess   Extrinsic isoperimetry and compactification of minimal surfaces in Euclidean and hyperbolic spaces 

      Gimeno, Vicent; Palmer Andreu, Vicente © Springer, Part of Springer Science+Business Media (2013)
      We study the topology of (properly) immersed complete minimal surfaces P 2 in Hyperbolic and Euclidean spaces which have finite total extrinsic curvature, using some isoperimetric inequalities satisfied by the extrinsic ...
    • openAccess   Dispersion management in two-photon microscopy by using diffractive optical elements 

      Mendoza-Yero, Omel; Pérez Vizcaíno, Jorge; Mínguez-Vega, Gladys; Martinez Cuenca, Raul; Andrés, Pedro; Lancis, Jesús Optical Society of America (2013)
      We demonstrate efficient generation of wide-field fluorescence signals in two-photon microscopy exploiting diffractive optical elements and short pulses by using a dispersion-compensated beam delivery optics module. ...
    • openAccess   Geospatial information infrastructures to address spatial needs in health: Collaboration, challenges and opportunities 

      Granell, Carlos; Belmonte-Fernández, Óscar; Díaz Sánchez, Laura Elsevier (2013)
      Most health-related issues such as public health outbreaks and epidemiological threats are better understood from a spatial–temporal perspective and, clearly demand related geospatial datasets and services so that decision ...
    • openAccess   The Euler Number from the Distance Function 

      Gual-Arnau, Ximo International Society for Stereology (2013)
      We present a new method to obtain the Euler number of a domain based on the tangent counts of concentric spheres in R3 (or circles in R2), with respect to the center O, that sweeps the domain. This method is derived from ...
    • closedAccess   Spatial pattern modelling of wildfires in Catalonia, Spain 2004–2008 

      Serra, Laura; Juan, Pablo; Varga, Diego; Mateu, Jorge; Sáez Zafra, Marc Elsevier (2013)
      The paper has three objectives: firstly, to evaluate how the extent of clustering in wildfires differs across the years they occurred; secondly, to analyse the influence of covariates on trends in the intensity of wildfire ...
    • openAccess   A literature review on the application of evolutionary computing to credit scoring 

      Marqués Marzal, Ana Isabel; García, Vicente; Sánchez Garreta, Josep Salvador Palgrave Macmillan (2013)
      The last years have seen the development of many credit scoring models for assessing the creditworthiness of loan applicants. Traditional credit scoring methodology has involved the use of statistical and mathematical ...
    • openAccess   On the suitability of resampling techniques for the class imbalance problem in credit scoring 

      Marqués Marzal, Ana Isabel; García, Vicente; Sánchez Garreta, Josep Salvador Palgrave Macmillan (2013)
      In real-life credit scoring applications, the case in which the class of defaulters is under-represented in comparison with the class of non-defaulters is a very common situation, but it has still received little attention. ...
    • closedAccess   Temporal Distribution and Weather Correlates of Norway Rat (Rattus norvegicus) Infestations in the City of Madrid, Spain 

      Tamayo Uria, Ibon; Mateu, Jorge; Mughini Gras, Lapo Springer Verlag (2013)
      Urban Norway rats are challenging pests, posing significant health and economic threats. Implementing ecologically based integrated rodent management (EBIRM) programmes relies primarily on the understanding of ecological ...
    • openAccess   Leveraging electronic healthcare record standards and semantic web technologies for the identification of patient cohorts 

      Fernández Breis, Jesualdo Tomás; Maldonado, Jose Alberto; Marcos, Mar; Legaz-García, María del Carmen; Moner, David; Torres-Sospedra, Joaquín; Esteban-Gil, Ángel; Martínez-Salvador, Begoña; Robles, Montserrat American Medical Informatics Association (2013)
      Background The secondary use of electronic healthcare records (EHRs) often requires the identification of patient cohorts. In this context, an important problem is the heterogeneity of clinical data sources, which can be ...
    • closedAccess   A continuous wavelet-based approach to detect anisotropic properties in spatial point processes 

      D'Ercole, Roberto; Mateu, Jorge World Scientific Publishing (2013)
      A two-dimensional stochastic point process can be regarded as a random measure and thus represented as a (countable) sum of Delta Dirac measures concentrated at some points. Integration with respect to the point process ...
    • openAccess   Photon Counting 3-D Object Recognition Using Digital Holography 

      Latorre Carmona, Pedro; Javidi, Bahram; Pla, Filiberto; Tajahuerce, Enrique Institute of Electrical and Electronics Engineers (IEEE) (2013)
      We present an analysis of the recognition performance of 3-D objects reconstructed from digital holograms recorded under photon counting conditions. The digital holograms are computed by applying four-step phase-shifting ...
    • closedAccess   Discovering places of interest in everyday life from smartphone data 

      Montoliu Colás, Raul; Blom, Jan; Gatica-Perez, Daniel Springer (2013)
      In this paper, a new framework to discover places-of-interest from multimodal mobile phone data is presented. Mobile phones have been used as sensors to obtain location information from users’ real lives. A place-of-interest ...