Now showing items 1-5 of 5

    • CIELAB color paths during meat shelf life 

      Hernández Salueña, Begoña Upna Orcid; Sáenz Gamasa, Carlos Upna Orcid; Diñeiro Rubial, José Manuel Upna Orcid; Alberdi Odriozola, Coro Upna Orcid (Elsevier, 2019)   Artículo / Artikulua  OpenAccess
      Meat color evolution from freshly cut to beyond shelf life, up to 40% of metmyoglobin, has been theoretically modeled using the Kubelka-Munk theory and a set of measured reference reflectance spectra of deoxymyoglobin, ...
    • Diffuse irradiance on tilted planes in urban environments: evaluation of models modified with sky and circumsolar view factors 

      García Ruiz, Ignacio Upna Orcid; Blas Corral, María Ángeles de Upna Orcid; Hernández Salueña, Begoña Upna Orcid; Sáenz Gamasa, Carlos Upna Orcid; Torres Escribano, José Luis Upna Orcid (Elsevier, 2021)   Artículo / Artikulua  OpenAccess
      Numerous studies have analyzed existing irradiance models for estimating sky diffuse irradiance on tilted planes. However, few have evaluated the suitability of these models for estimating irradiance in obstructed environments, ...
    • Evaluation of two procedures for selecting the CIE standard sky type using high dynamic range images 

      García Ruiz, Ignacio Upna Orcid; Blas Corral, María Ángeles de Upna Orcid; Torres Escribano, José Luis Upna Orcid; Hernández Salueña, Begoña Upna Orcid; Sáenz Gamasa, Carlos Upna Orcid; Ormazábal Pagola, Mikel Upna (International Solar Energy Society, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      The characterization of sky conditions according to the CIE Standard General Sky classification requires knowledge of diffuse luminance angular distribution in the sky vault. This variable is usually measured by sky scanners. ...
    • Luminance calibration of a full sky HDR imaging system using sky scanner measurements 

      García Ruiz, Ignacio Upna Orcid; Sáenz Gamasa, Carlos Upna Orcid; Hernández Salueña, Begoña Upna Orcid; García Santos, Rafael Rogelio; Torres Escribano, José Luis Upna Orcid (Solar Energy Society, 2022)   Artículo / Artikulua  OpenAccess
      A full sky High Dynamic Range imaging system, based on a Single-Lens Reflex camera with a fisheye lens, has been constructed and calibrated with a sky scanner luminance meter. The method considers the geometrical, spectral, ...
    • Negative reflection, negative refraction and ray displacements in biaxial absorbing media, In4Se3 

      Alberdi Odriozola, Coro Upna Orcid; Diñeiro Rubial, José Manuel Upna Orcid; Hernández Salueña, Begoña Upna Orcid; Sáenz Gamasa, Carlos Upna Orcid (Taylor & Francis, 2019)   Artículo / Artikulua  OpenAccess
      We show the existence of negative reflection and negative refraction in a slab of biaxial absorbing medium In 4Se3 placed between two isotropic media. We find the limiting angle of incidence in the slab for these phenomena ...