Envíos recientes

  • Super-oscillatory metalens at terahertz for enhanced focusing with reduced side lobes 

    Legaria Lerga, Santiago; Pacheco-Peña, Víctor Upna; Beruete Díaz, Miguel Upna (MDPI, 2018)   Artículo / Artikulua  OpenAccess
    In this paper, we design and numerically demonstrate an ultra-thin super-oscillatory metalens with a resolution below the diffraction limit. The zones of the lens are implemented using metasurface concepts with hexagonal ...
  • Sulfate soils stabilization with magnesium-based binders 

    Seco Meneses, Andrés; Miqueleiz, Luis; Prieto Cobo, Eduardo; Marcelino Sádaba, Sara; García, Beñat; Urmeneta, Pablo (Elsevier, 2016)   Artículo / Artikulua  OpenAccess
    Sulfate soils' stabilization is a very interesting subject with technical, economic and environmental implications. The difficulty of their stabilization is due to the fact that the usual stabilizer additives are based ...
  • Estimated and real durability of unfired clay bricks: Determining factorsand representativeness of the laboratory tests 

    Seco Meneses, Andrés; Urmeneta, Pablo; Prieto Cobo, Eduardo; García, Beñat; Miqueleiz, Luis (Elsevier, 2016)   Artículo / Artikulua  OpenAccess
    This paper presents an analysis of the representativeness of the main laboratory tests and the real dura-bility of earth-based construction materials. For this study, a natural marl soil, mixed with different per-centages ...
  • Magnesium oxide as alternative binder for unfired clay bricks manufacturing 

    Espuelas Zuazu, Sandra; Omer, Joshua; Marcelino Sádaba, Sara; Echeverría, Angel María; Seco Meneses, Andrés (Elsevier, 2017)   Artículo / Artikulua
    Replacement of fired bricks by unfired ones could be an effective way to reduce the building industryenvironmental footprint: Their manufacture not only requires less energy and natural resources but alsogenerates less waste. ...
  • Sustainable unfired bricks manufacturing from construction anddemolition wastes 

    Seco Meneses, Andrés; Omer, Joshua; Marcelino Sádaba, Sara; Espuelas Zuazu, Sandra; Prieto Cobo, Eduardo (Elsevier, 2018)   Artículo / Artikulua
    The management of construction and demolition wastes is a huge challenge for most Governments. Thegreatest component of such wastes is concrete and masonry fragments or remains. Among the most com-mon approaches to ...
  • Orness measurements for lattice m-dimensional interval-valued OWA operators 

    Miguel Turullols, Laura de Upna; Paternain Dallo, Daniel Upna; Lizasoain Iriso, María Inmaculada Upna; Ochoa Lezaun, Gustavo Upna; Bustince Sola, Humberto Upna (Elsevier, 2018)   Artículo / Artikulua
    Ordered weighted average (OWA) operators are commonly used to aggregate information in multiple situations, such as decision making problems or image processing tasks. The great variety of weights that can be chosen to ...
  • Tunable deflection and asymmetric transmission of THz waves using a thin slab of graphene-dielectric metamaterial, with and without ENZ components 

    Serebryannikov, Andriy; Hajian, Hodjat; Beruete Díaz, Miguel Upna; Ozbay, Ekmel; Vandenbosch, Guy A. E. (Optical Society of America, 2018)   Artículo / Artikulua  OpenAccess
    Tunable deflection of obliquely incident, linearly polarized terahertz waves is theoretically studied in a wide frequency range around 20 THz, by combining a thin slab of graphene-dielectric metamaterial (with ten layers ...
  • New measures for comparing matrices and their application to image processing 

    Sesma Sara, Mikel Upna; Miguel Turullols, Laura de Upna; Pagola Barrio, Miguel Upna; Burusco Juandeaburre, Ana Upna; Mesiar, Radko; Bustince Sola, Humberto Upna (Elsevier, 2018)   Artículo / Artikulua
    In this work we present the class of matrix resemblance functions, i.e., functions that measure the difference between two matrices. We present two construction methods and study the properties that matrix resemblance ...
  • A mixed-FEM and BEM coupling for the approximation of the scattering of thermal waves in locally non-homogeneous media 

    Rapún Araiz, María Luisa; Sayas, Francisco Javier (EDP Sciences, 2006)   Artículo / Artikulua  OpenAccess
    This paper proposes and analyzes a BEM-FEM scheme to approximate a time-harmonic diffusion problem in the plane with non-constant coefficients in a bounded area. The model is set as a Helmholtz transmission problem with ...
  • Detection of PrPSc in lung and mammary gland is favored by the presence of Visna/maedi virus lesions in naturally coinfected sheep 

    Salazar, Eider; Monleón, Eva; Bolea, Rosa; Acín, Cristina; Pérez, Marta; Álvarez, Neila; Leginagoikoa, Iratxe; Juste, Ramón; Minguijón, Esmeralda; Reina Arias, Ramsés Upna; Glaría Ezquer, Idoia Upna; Berriatua, Eduardo; Andrés Cara, Damián de Upna; Badiola, Juan José; Amorena Zabalza, Beatriz Upna; Luján, Lluís (EDP Sciences, 2010)   Artículo / Artikulua  OpenAccess
    There are few reports on the pathogenesis of scrapie (Sc) and Visna/maedi virus (VMV) coinfections. The aim of this work was to study in vivo as well as post mortem both diseases in 91 sheep. Diagnosis of Sc and VMV ...
  • A chloroplast transgenic approach to hyper-express and purify human serum albumin, a protein highly susceptible to proteolytic degradation 

    Fernández San Millán, Alicia Upna; Mingo Castel, Ángel; Miller, Michael; Daniell, Henry (Wiley / Blackwell, 2003)   Artículo / Artikulua  OpenAccess
    Human Serum Albumin (HSA) accounts for 60% of the total protein in blood serum and it is the most widely used intravenous protein in a number of human therapies. HSA, however, is currently extracted only from blood because ...
  • Effect of initial step height on headcut development in upland concentrated flows 

    Bennett, S.J.; Casalí Sarasíbar, Javier Upna (American Geophysical UnionWiley, 2001)   Artículo / Artikulua  OpenAccess
    Experiments were conducted to examine the effect of initial step height on growth, development, and upstream migration of headcuts in concentrated flows typical of rills, crop furrows, and ephemeral gullies. In a laboratory ...
  • Wage stickiness and unemployment fluctuations: an alternative approach 

    Casares Polo, Miguel Upna; Moreno, Antonio Upna; Vázquez, Jesús (Springer, 2012)   Artículo / Artikulua  OpenAccess
    Erceg et al. (J Monet Econ 46:281–313, 2000) introduce sticky wages in a New-Keynesian general-equilibrium model. Alternatively, it is shown here how wage stickiness may bring unemployment fluctuations into a New-Keynesian ...
  • An engagement-based school experience as a premise of wellbeing 

    Alonso Martirena, Yolanda (Elsevier, 2017)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    In the challenge of providing a quality education to all students, one of the main driving forces of change is the teacher and his/her attitudes; the need to address inclusion and participation of everyone therefore affects ...
  • Knowledge of the natural and social environment in ICT consumer children 

    Belletich Ruiz, Olga Upna; Pérez de Villarreal Zufiaurre, Maider Upna (Elsevier, 2017)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    This study shows the influence of the current technological culture and ICT in the dynamics of socialization and the process of interaction with the reality of 2 to 4 year old children who are active or passive consumers ...
  • Evaluation of a gully headcut retreat model using multitemporal aerial photographs and digital elevation models 

    Campo Bescós, Miguel Ángel Upna; Flores Cervantes, J. H.; Bras, R. L.; Casalí Sarasíbar, Javier Upna; Giráldez Cervera, Juan Vicente (American Geophysical UnionWiley, 2013)   Artículo / Artikulua  OpenAccess
    A large fraction of soil erosion in temperate climate systems proceeds from gully headcut growth processes. Nevertheless, headcut retreat is not well understood. Few erosion models include gully headcut growth processes, ...
  • The role of accounting accruals for the prediction of future cash flows: evidence from Spain 

    Arnedo Ajona, Laura; Lizarraga Dallo, Fermín; Sánchez Alegría, Santiago (Springer, 2012)   Artículo / Artikulua  OpenAccess
    The aim of this study is to determine whether accruals have information value beyond that provided by isolated current cash flows for the prediction of future cash flows. Using a sample of 4,397 Spanish companies (mostly ...
  • An axiomatic analysis of ranking sets under simple categorization 

    Alcantud, José C. R.; Arlegi Pérez, Ricardo Upna (Springer, 2012)   Artículo / Artikulua  OpenAccess
    This paper contributes to the axiomatization of additive rules for ranking sets of objects under the psychological principle of categorization. Firstly we proceed with the case where the elements in the sets are categorized ...
  • The effect of flooding on mental health: lessons learned for building resilience 

    Foudi, Sébastien; Osés Eraso, Nuria Upna; Galarraga, Ibon (American Geophysical UnionWiley, 2017)   Artículo / Artikulua  OpenAccess
    Risk management and climate adaptation literature focuses mainly on reducing the impacts of, exposure to, and vulnerability to extreme events such as floods and droughts. Posttraumatic stress disorder is one of the most ...
  • The influence of entrepreneurs’ social referents on start-up size 

    Contín Pilart, Ignacio Upna; Martín Sánchez, Víctor; Larraza Kintana, Martín Upna (Springer, 2018)   Artículo / Artikulua  OpenAccess
    This paper uses social comparison theory to explore the effect that the average size of established businesses at the regional (provincial) level may have on start-up size. It is argued that established entrepreneurs at ...

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