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Mostrando ítems 202-221 de 751

    • openAccess   Deep transfer learning for the recognition of types of face masks as a core measure to prevent the transmission of COVID-19 

      Mar Cupido, Ricardo; García, Vicente; Rivera-Zárate, Gilberto; Sánchez Garreta, Josep Salvador Elsevier (2022-08)
      The use of face masks in public places has emerged as one of the most effective non-pharmaceutical measures to lower the spread of COVID-19 infection. This has led to the development of several detection systems for ...

    • openAccess   Deep Unsupervised Embedding for Remotely Sensed Images Based on Spatially Augmented Momentum Contrast 

      kang, jian; Fernandez-Beltran, Ruben; Duan, Puhong; Liu, Sicong; Plaza, Antonio IEEE (2020-07-14)
      Convolutional neural networks (CNNs) have achieved great success when characterizing remote sensing (RS) images. However, the lack of sufficient annotated data (together with the high complexity of the RS image domain) ...

    • openAccess   Deployment of an open sensorized platform in a smart city context 

      Trilles, Sergio; Calia, Andrea; Belmonte-Fernández, Óscar; Torres-Sospedra, Joaquín; Montoliu Colás, Raul; Huerta, Joaquin Elsevier (2017-11)
      The race to achieve smart cities is producing a continuous effort to adapt new developments and knowledge, for administrations and citizens. Information and Communications Technology are called on to be one of the key ...

    • openAccess   Depth and All-in-Focus Image Estimation in Synthetic Aperture Integral Imaging Under Partial Occlusions 

      Martínez Sotoca, José; Latorre Carmona, Pedro; Pla, Filiberto; Javidi, Bahram IEEE (2018-12)
      A common assumption in the integral imaging reconstruction is that a pixel will be photo-consistent if all viewpoints observed by the different cameras converge at a single point when focusing at the proper depth. However, ...

    • closedAccess   Depth estimation improvement in 3D integral imaging using an edge removal approach 

      Martínez Sotoca, José; Latorre Carmona, Pedro; Espinós-Morató, H.; Pla, Filiberto; Javidi, Bahram Springer (2018)
      A new depth estimation method for 3D reconstruction in a synthetic aperture integral imaging framework is presented. This method removes the edges of the objects in the elemental images when the objects are in focus. This ...

    • openAccess   Depth of thermal penetration in straight grinding 

      González-Santander, J.L.; Espinós-Morató, H. Springer-Verlag (2018-03)
      Unlike the usual numerical FEM approach to determine the thermally affected layer during the grinding process, we propose a simple analytical approach to estimate the depth of thermal penetration. For this purpose, the ...

    • openAccess   Desarrollo de productos avanzados para la misión SEOSAT/Ingenio 

      Sabater, N.; Ruiz-Verdú, A.; Delegido, J.; Fernandez-Beltran, Ruben; Latorre Carmona, Pedro; Pla, Filiberto; González-Audícana, M.; Álvarez-Mozos, J.; Sola, I.; Villa, G.; Tejeiro, J. A.; De Miguel, E.; Jimenez, M.; Molina, S.; Moreno, J. Asociación Española de Teledetección (2016)
      SEOSAT/Ingenio es la futura misión española de observación de la Tierra en el óptico en alta resolución espacial. Mientras que los productos de imagen a Nivel 1, radiancias geo-referenciadas a nivel de sensor, se encuentran ...

    • openAccess   Descriptions of Spatial Operations -- Recent Approaches and Community Feedback 

      Hofer, Barbara; Brauner, Johannes; Wiemann, Stefan; Jackson, Mike J.; Granell, Carlos; Rodrigues, Amanda; Nuest, Daniel European Commission Joint Research Centre (2015)
      Progress in the technical provision of spatial operations as loosely-coupled interoperable web services requires a corresponding development of standardisation in their description. Operation discovery, usage and interpretation ...

    • openAccess   Designing Semantic Application Programming Interfaces for Open Government Data 

      Degbelo, Auriol; Trilles, Sergio; Kray, Christian; Bhattachaya, Devanjan; Schiestel, Nicholas; Wissing, Jonas; Granell, Carlos Danube-University Krems (2016)
      Many countries currently maintain a national data catalog, which provides access to the available datasets – sometimes via an Application Programming Interface (API). These APIs play a crucial role in realizing the ...

    • openAccess   Detección de ruido en aprendizaje semisupervisado con el uso de flujos de datos 

      Sánchez Garreta, Josep Salvador; Pla, Filiberto; Pascual, Damaris; Vázquez, Fernando D. Universidad de Antioquia (2014)
      A menudo, es necesario construir conjuntos de entrenamiento. Si disponemos solamente de un número reducido de objetos etiquetados y de un conjunto numeroso de objetos no etiquetados, podemos construir el conjunto ...

    • openAccess   Developing a Forest Data Portal to Support Multi-Scale Decision Making 

      McInerney, Daniel; Bastin, Lucy; Díaz Sánchez, Laura; Figueiredo, Carlos A.; Barredo, José I.; San Miguel-Ayanz, Jesús Institute of Electrical and Electronics Engineers (2012)
      Forests play a pivotal role in timber production, maintenance and development of biodiversity and in carbon sequestration and storage in the context of the Kyoto Protocol. Policy makers and forest experts therefore require ...

    • openAccess   Developing a smartphone App based on the Unified Protocol for the transdiagnostic treatment of emotional disorders: A qualitative analysis of users and professionals' perspectives 

      González-Pérez, Alberto; Osma López, Jorge Javier; Martínez García, Laura; Peris Baquero, Óscar; Prado-Abril, Javier Elsevier (2022-09)
      Emotional Disorders have become the most prevalent mental disorders in the world. In relation to their high prevalence, mental health care from public health services faces major challenges. Consequently, finding solutions ...

    • closedAccess   Developing a virtual trade fair using an agent-oriented approach 

      Remolar, Inmaculada; Garcés Calvelo, Alejandro; Rebollo Santamaría, Cristina; Chover, Miguel; Quirós Bauset, Ricardo; Gumbau Portalés, Jesús Springer (2015)
      Online virtual trade fairs are becoming a popular way of establishing economic trade relationships nowadays. In the current context of the world economy, new ways of creating virtual environments where suppliers can show ...

    • openAccess   Development of a Common Framework for Analysing Public Transport Smart Card Data 

      Benito, Pedro J; Trilles, Sergio; Gutierrez, Aaron; Miravet, Daniel MDPI (2021-09-24)
      The data generated in public transport systems have proven to be of great importance in improving knowledge of public transport systems, being very valuable in promoting the sustainability of public transport through ...

    • openAccess   Development of an open sensorized platform in a smart agriculture context: A vineyard support system for monitoring mildew disease 

      Trilles, Sergio; Torres-Sospedra, Joaquín; Belmonte-Fernández, Óscar; Zarazaga-Soria, F. Javier; González-Pérez, Alberto; Huerta, Joaquin Elsevier (2019)
      In recent years, some offcial reports, to produce best products regarding quality, quantity and economic conditions, recommend that the farming sector should benefit with new tools and techniques coming from Information ...

    • openAccess   Development of spatial density maps based on geoprocessing web services: application to tuberculosis incidence in Barcelona, Spain 

      Dominkovics, Pau; Granell, Carlos; Perez-Navarro, Antoni; Casals, Martí; Orcau, Àngels; Caylà, Joan A. BioMed Central (2011-11-29)
      Background: Health professionals and authorities strive to cope with heterogeneous data, services, and statistical models to support decision making on public health. Sophisticated analysis and distributed processing ...

    • 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   Diffractive optics for quasi-direct space-to-time pulse shaping 

      Mínguez-Vega, Gladys; Mendoza-Yero, Omel; Lancis, Jesús; Gisbert, Rafael; Andrés, Pedro Optical Society of America (2008)
      The strong chromatic behavior associated with a conventional diffractive lens is fully exploited to propose a novel optical device for pulse shaping in the femtosecond regime. This device consists of two optical elements: ...

    • openAccess   Diffractive optics for spectral control of the supercontinuum generated in sapphire with femtosecond pulses 

      Romero, Carolina; Borrego Varillas, Rocío; Camino, Acner; Mínguez-Vega, Gladys; Mendoza-Yero, Omel; Hernández Toro, Juan; Vázquez de Aldana, Javier R. Optical Society of America (2011)
      We propose the use of kinoform diffractive lenses to focus near infrared femtosecond pulses in sapphire crystals for supercontinuum generation. It is shown that a strongly peaked structure appears in the blue region of the ...

    • openAccess   Dipolar localization of waves in twisted phononic crystal plates 

      Martí-Sabaté, Marc; Torrent, Daniel American Physical Society (2021-01-11)
      The localization of waves in two-dimensional clusters of scatterers arranged in relatively twisted lattices is studied by multiple scattering theory. It is found that, for a given frequency, it is always possible to nd ...