• Dissolved solids and suspended sediment dynamics from five small agricultural watersheds in Navarre, Spain: a 10-year study 

      Merchán Elena, Daniel Upna; Luquin Oroz, Eduardo Adrián; Hernández García, Iker; Campo Bescós, Miguel Ángel Upna; Giménez Díaz, Rafael Upna; Casalí Sarasíbar, Javier Upna; Valle de Lersundi, Jokin del (Elsevier, 2019)   Artículo / Artikulua
      Dissolved solids (DS) and suspended sediment (SS) loads are considered relevant environmental problems. They are related to a wide range of on-site and off-site impacts, such as soil erosion or salinization of water bodies. ...
    • Robust multisampled capacitor voltage active damping for grid-connected power converters 

      Samanes Pascual, Javier; Urtasun Erburu, Andoni Upna; Gubía Villabona, Eugenio Upna; Petri, Alberto (Elsevier, 2019)   Artículo / Artikulua
      The derivative feedback of the capacitor voltage is one of the most extended active damping strategies, used to eliminate stability problems in grid-connected power converters with an LCL filter. This strategy is equivalent ...
    • Effects of a soft-core coulomb potential on the dynamics of a hydrogen atom near a metal surface 

      Iñarrea, Manuel; Lanchares, Víctor; Palacián Subiela, Jesús Francisco Upna; Pascual, Ana Isabel; Salas, José Pablo; Yanguas Sayas, Patricia Upna (Elsevier, 2019)   Artículo / Artikulua
      The goal of this paper is to investigate the effects that the replacement of the Coulomb potential by a soft-core Coulomb potential produces in the classical dynamics of a perturbed Rydberg hydrogen atom. As example, we ...
    • Suicidal attempts among patients with substance use disorders who present with suicidal ideation 

      López-Goñi, José Javier Upna; Fernández-Montalvo, Javier Upna; Arteaga Olleta, Alfonso Upna; Haro Escribano, Begoña (Elsevier, 2019)   Artículo / Artikulua
      Background and aims: Patients with addictions have a great risk of suicidal ideation and attempts. Suicidal behaviour is a continuum that begins with ideation and may continue with planning, ...
    • Sustainable management of metasequoia glyptostroboides plantation forests in Shanghai 

      Zheng, Ji; Blanco Vaca, Juan Antonio Upna; Wei, Xiaohua; Liu, Chunjiang (MDPI, 2018)   Artículo / Artikulua  OpenAccess
      Urban forestry is increasingly used as a tool for climate change mitigation and for providing environmental services to inhabitants of urban areas. However, tree species used in urban forestry are usually different from ...
    • Application of two different methods for extending lattice-valued restricted equivalence functions used for constructing similarity measures on L-fuzzy sets 

      Palmeira, Eduardo S.; Bedregal, Benjamin; Bustince Sola, Humberto Upna; Paternain Dallo, Daniel Upna; Miguel Turullols, Laura de Upna (Elsevier, 2018)   Artículo / Artikulua
      Based on previous investigations, we have proposed two different methods to extend lattice-valued fuzzy connectives (t-norms, t-conorms, negations and implications) and other related operators, considering a generalized ...
    • Runoff, nutrients, sediment and salt yields in an irrigated watershed in southern Navarre (Spain) 

      Merchán Elena, Daniel Upna; Casalí Sarasíbar, Javier Upna; Valle de Lersundi, Jokin del; Campo Bescós, Miguel Ángel Upna; Giménez Díaz, Rafael Upna; Preciado, Beatriz; Lafarga, Alberto (Elsevier, 2018)   Artículo / Artikulua
      The environmental impact of irrigated agriculture on water quality was assessed in Landazuria watershed (Navarre, northeast Spain), a 479.5 ha watershed with 53% of irrigated agricultural land. In the framework of a long-term ...
    • Sampling stratification using aerial imagery to estimate fruit load in peach tree orchards 

      Miranda Jiménez, Carlos Upna; Santesteban García, Gonzaga Upna; Urrestarazu Vidart, Jorge; Loidi Erviti, Maite; Royo Díaz, José Bernardo Upna (MDPI, 2018)   Artículo / Artikulua  OpenAccess
      A quick and accurate sampling method for determining yield in peach orchards could lead to better crop management decisions, more accurate insurance claim adjustment, and reduced expenses for the insurance industry. Given ...
    • Modelling the management of forest ecosystems: importance of wood decomposition 

      Blanco Vaca, Juan Antonio Upna; Page-Dumroese, Deborah S.; Jurgensen, Martin F.; Curran, Michale P.; Tirocke, Joanne M.; Walitalo, Joanna (Wiley, 2018)   Artículo / Artikulua
      Scarce and uncertain data on woody debris decomposition rates are available for calibrating forest ecosystem models, owing to the difficulty of their empirical estimations. Using field data from three experimental sites which ...
    • Extraordinary THz transmission with a small beam spot: the leaky wave mechanism 

      Navarro Cía, Miguel Upna; Pacheco Peña, Víctor Upna; Kuznetsov, Sergei A.; Beruete Díaz, Miguel Upna (Wiley, 2018)   Artículo / Artikulua
      The discovery of extraordinary optical transmission (EOT) through patterned metallic foils in the late 1990s was decisive for the development of plasmonics and cleared the path to employ small apertures for a variety of ...
    • Bringing the natives back: identifying and alleviating establishment limitations of native hardwood species in a conifer plantation 

      Li, Yu-Tsen; Lo, Yueh-Hsin Upna; Lin, Yi-Ching; Guan, Biing T.; Blanco Vaca, Juan Antonio Upna; You, Chi-How (MDPI, 2018)   Artículo / Artikulua  OpenAccess
      To facilitate the reintroduction of five native late-successional Taiwanese Fagaceae species into Japanese cedar (Cryptomeria japonica (D.) Don) plantations, we experimented with methods to alleviate their establishment ...
    • Ku band low profile asymmetric Bull’s-Eye antenna with reduced side lobes and monopole feeding 

      Beaskoetxea Gartzia, Unai Upna; Torres García, Alicia E. Upna; Beruete Díaz, Miguel Upna (IEEE, 2018)   Artículo / Artikulua
      In this paper, a linearly polarized low profile and asymmetric Bull’s-Eye leaky wave antenna fed by a monopole operating at 13 GHz is presented. Broadside radiation from the monopole is achieved by surrounding it with an ...
    • Drought-induced changes in wood density are not prevented by thinning in Scots pine stands 

      Candel Pérez, David Upna; Lo, Yueh-Hsin Upna; Blanco Vaca, Juan Antonio Upna; Chiu, Chih-Ming; Camarero, Jesús Julio; González de Andrés, Ester Upna; Imbert Rodríguez, Bosco Upna; Castillo Martínez, Federico Upna (MDPI, 2018)   Artículo / Artikulua  OpenAccess
      Density is an important wood mechanical property and an indicator of xylem architecture and hydraulic conductivity. It can be influenced by forest management and climate. We studied the impact of thinning and climate ...
    • Data quality assessment of the Major Trauma Registry of Navarra and comparison of its results with TraumaRegistry DGU® of the German Trauma Society 

      Ali Ali, Bismil (2018)   Tesis doctoral / Doktoretza tesia  OpenAccess
      Antecedentes: Los registros de trauma son herramientas útiles para evaluar y mejorar la atención de los pacientes a través de la comparación con otros. En España los datos son limitados a nivel nacional y la mayoría de ...
    • Protección internacional de grupos étnicos: derechos de minorías nacionales y de pueblos indígenas. Comparación entre los gitanos en España y los mapuche en Chile 

      Andrade Martínez, María José (2018)   Tesis doctoral / Doktoretza tesia  OpenAccess
      En esta tesis hemos propuesto indagar en las similitudes y diferencias entre ambos tipos de grupos étnicos, pues desde esas características se han elaborado las definiciones que de ellos ha hecho la comunidad internacional, ...
    • Singular reduction of resonant Hamiltonians 

      Meyer, Kenneth Ray; Palacián Subiela, Jesús Francisco Upna; Yanguas Sayas, Patricia Upna (IOP PublishingLondon Mathematical Society, 2018)   Artículo / Artikulua
      We investigate the dynamics of resonant Hamiltonians with n degrees of freedom to which we attach a small perturbation. Our study is based on the geometric interpretation of singular reduction theory. The flow of the ...
    • Climate-forest-water-people relations: seven system delineations 

      Noordwijk, Meine van; Creed, Irena F.; Jones, Julia A.; Wei, Xiaohua; Gush, Mark; Blanco Vaca, Juan Antonio Upna; Sullivan, Caroline A.; Bishop, Kevin; Murdiyarso, Daniel; Xu, Jianchu; Claasen, Marius; McNulty, Steven G.; Ellison, David (2018)   Capítulo de libro / Liburuen kapitulua  OpenAccess
      In this chapter, we review current scientific understanding and hypotheses at seven system delineations that build up from the level of a ‘tree’ interacting with water, to that of a social-ecological system at the scale ...
    • Determinants of the forest-water relationship 

      McNulty, Steven G.; Archer, Emma; Gush, Mark; Noordwijk, Meine van; Ellison, David; Blanco Vaca, Juan Antonio Upna; Xu, Jianchu; Bishop, Kevin; Wei, Xiaohua; Vira, Bhaskar; Creed, Irena F.; Mukherji, Aditi (2018)   Capítulo de libro / Liburuen kapitulua  OpenAccess
      Our analysis of forest-water relations addresses four important subsystems of a linked planetary social-ecological system: climate, forests, water and people. In this chapter, we consider how each of these subsystems ...
    • Phase reversal technique applied to fishnet metalenses 

      Pacheco-Peña, Víctor Upna; Minin, Igor V.; Minin, Oleg V.; Beruete Díaz, Miguel Upna (Hindawi, 2018)   Artículo / Artikulua  OpenAccess
      In this work, the fishnet metamaterial is applied to several converging metalenses by combining the zoning, reference phase, and phase reversal techniques. First, the zoning and reference phase techniques are implemented ...
    • Convolution lattices 

      Miguel Turullols, Laura de Upna; Bustince Sola, Humberto Upna; De Baets, Bernard (Elsevier, 2018)   Artículo / Artikulua
      We propose two convolution operations on the set of functions between two bounded lattices and investigate the algebraic structure they constitute, in particular the lattice laws they satisfy. Each of these laws requires ...