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Mostrando ítems 505-524 de 743

    • openAccess   Parabolicity criteria and characterization results for submanifoldsof bounded mean curvature in model manifolds with weights 

      Hurtado, Ana; Palmer Andreu, Vicente; Rosales, César Elsevier (2020)
      Let P be a submanifold properly immersed in a rotationally symmetric manifold having a pole and endowed with a weight e h. The aim of this paper is twofold. First, by assuming certain control on the h-mean curvature of ...

    • closedAccess   Parabolicity, Brownian Exit Time and Properness of Solitons of the Direct and Inverse Mean Curvature Flow 

      Gimeno, Vicent; Palmer, Vicente (2019-10-05)
      We study some potential theoretic properties of homothetic solitons n of the MCF and the IMCF. Using the analysis of the extrinsic distance function defined on these submanifolds in Rn+m, we observe similarities and ...

    • 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   Parametric CAD modeling: An analysis of strategies for design reusability 

      Dorribo Camba, Jorge; Contero, Manuel; Company, Pedro Elsevier (2016-05)
      CAD model quality in parametric design scenarios largely determines the level of flexibility and adaptability of a 3D model (how easy it is to alter the geometry) as well as its reusability (the ability to use existing ...

    • closedAccess   Partial and semi-partial statistics of spatial associations for multivariate areal data 

      Eckardt, Matthias; Mateu, Jorge Wiley (2020-06-12)
      The analysis of correlation structures among multivariate spatially aggregated data has become increasingly important and poses substantial challenges. This article concerns the development of partial and semi‐partial ...

    • closedAccess   Partial characteristics for marked spatial point processes 

      Eckardt, Matthias; Mateu, Jorge Wiley (2019-09)
      This paper introduces a new class of partial summary characteristics for twotypes of marked planar point processes. We consider purely qualitatively marked spatial point processes and multitype spatial point processes with ...

    • closedAccess   Partially-coherent spirally-polarized gradual-edge imaging 

      Pérez-Aviñoa, Marcos; Martínez-Herrero, Rosario; Vallmitjana, Santiago; Latorre Carmona, Pedro; Juvells, Ignasi; Carnicer, Artur Elsevier (2019)
      In this work we develop a partially-coherent spirally-polarized imaging system for generating gradual edge detection images. A rotating diffuser is used for producing illumination sources with tunable degree of coherence. Using ...

    • openAccess   La participación de las personas mayores en talleres y su efecto sobre la soledad 

      Esteve Grifo, Marina; Caballer Miedes, Antonio Publicacions de la Universitat Jaume I. Servei de Comunicació i Publicacions (2020)
      Es importante valorar que la calidad de vida de una persona mayor no solo está determinada por la salud física, sino también por la emocional. Existen evidencias del efecto que la soledad o el aislamiento social puede ...

    • openAccess   Participative site-specific agriculture analysis for smallholders 

      Huerta, Joaquin; Aragó Galindo, Pau; Granell, Carlos; Molin, Paulo Guilherme Springer (2012-04-27)
      Site-specific agriculture has been adopted in a high-tech context using, for instance, in situ sensors, satellite images for remote sensing analysis, and some other technological devices. However, farmers and smallholders ...

    • openAccess   Passive mobile data for studying seasonal tourism mobilities: an application in a Mediterranean Coastal destination 

      Benito, Pedro J; Trilles, Sergio; Gutierrez, Aaron MDPI (2021-02-22)
      The article uses passive mobile data to analyse the complex mobilities that occur in a coastal region characterised by seasonal patterns of tourism activity. A large volume of data generated by mobile phone users has ...

    • 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 ...

    • openAccess   Perception of products by progressive multisensory integration: a study on hammers 

      Vergara, Margarita; Mondragón Donés, Salvador; Sancho-Bru, Joaquin L.; Company, Pedro; Agost, Maria-Jesus Elsevier (2011-07)
      The aim of this work is to determine the influence of multisensory (visual-haptic) integration and the level of interaction (seeing photographs, seeing the actual product, touching it and using it) on the perception of ...

    • openAccess   Perimeter detection in sketched drawings of polyhedral shapes 

      Company, Pedro; Varley, Peter Ashley Clifford; Plumed, Raquel The Eurographics Association (2017)
      This paper describes a new “envelope” approach for detecting object perimeters in line-drawings vectorised from sketches of polyhedral objects. Existing approaches for extracting contours from digital images are unsuitable ...

    • openAccess   Periodically Correlated Space-Time Autoregressive Hilbertian Processes 

      Hashemi, Mahmoud; Mateu, Jorge; Zamani, Ali Atlantis Press (2021-06)
      In this paper, we introduce periodically correlated space-time autoregressive processes with values in Hilbert spaces. The existence conditions and the strong law of large numbers are established. Moreover, we present an ...

    • openAccess   Personalised code generation from large schema sets for geospatial mobile applications 

      Tamayo Fong, Alain; Granell, Carlos; Díaz Sánchez, Laura; Huerta, Joaquin Springer Vienna (2014-05)
      XML and XML Schema are used in the geospatial domain for the definition of standards that enhance the interoperability between producers and consumers of spatial data. The size and complexity of these geospatial standards ...

    • openAccess   Phase and amplitude reconstruction in single-pixel transmission microscopy: a comparison of Hadamard, cosine, and noiselet bases 

      Santos-Amador, A.; Araiza Esquivel, María A.; González, Humberto; Rodríguez-Cobos, A.; Tajahuerce, Enrique; Martínez-León, Lluís; Ramírez-Flores, G.; Balderas-Navarro, R. E. Optical Society of America (2021-08-10)
      Hadamard, cosine, and noiselet bases are implemented into a digital holographic microscope based on single-pixel imaging with the capability to retrieve images of complex objects. The object is illuminated with coherent ...

    • openAccess   Phase imaging by spatial wavefront sampling 

      Soldevila, Fernando; Durán, Vicente; Clemente Pesudo, Pedro Javier; Lancis, Jesús; Tajahuerce, Enrique Optical Society of America (2018)
      Phase-imaging techniques extract the optical path length information of a scene, whereas wavefront sensors provide the shape of an optical wavefront. Since these two applications have different technical requirements, ...

    • 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 ...

    • openAccess   PiCoCo: Pixelwise Contrast and Consistency Learning for Semisupervised Building Footprint Segmentation 

      kang, jian; Wang, Zhirui; Zhu, Ruoxin; Sun, Xian; Fernandez-Beltran, Ruben; Plaza, Antonio IEEE (2021-10-11)
      Building footprint segmentation from high-resolution remote sensing (RS) images plays a vital role in urban planning, disaster response, and population density estimation. Convolutional neural networks (CNNs) have been ...

    • closedAccess   Pinpointing spatio-temporal interactions in wildfire patterns 

      Juan, Pablo; Mateu, Jorge; Sáez Zafra, Marc Springer-Verlag (2012-12)
      The spatial and spatio-temporal patterns of wildfire incidence and their relationship to various geographical and environmental variables are analyzed. Such relationships may be treated as components in particular point ...