• 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  OpenAccess
      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 ...
    • 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 ...
    • 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 ...
    • 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 ...
    • 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, Rafael; 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 ...
    • 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, ...
    • Sensitivity enhancement experimental demonstration using a low cutoff wavelength SMS modified structure coated with a pH sensitive film 

      Rodríguez-Rodríguez, W.E.; Del Villar, Ignacio Upna; Zamarreño, Carlos R.; Matías Maestro, Ignacio Upna; Arregui San Martín, Francisco Javier Upna; Rodríguez-Rodríguez, A.J.; Domínguez-Cruz, R.F. (Elsevier, 2018)   Artículo / Artikulua
      The multimode interference (MMI) effect in a single mode-multimode-single mode (SMS) can be used fordevelopment of wavelength shift detection based sensors. In this work, the focus is centered on obtainingwavelength shifts ...
    • Estrategias del alumnado de Educación Secundaria para estimar la densidad 

      Napal Fraile, María Upna; Echevarría Morrás, Jesús; Zulet González, Amaia Upna; Santos Cervera, Leyre; Ibarra Murillo, Julia Upna (Universitat Autònoma de BarcelonaUniversitat de València, 2018)   Artículo / Artikulua  OpenAccess
      La densidad, o concentración de materia, es un concepto muy relevante pero que genera muchas dificultades de comprensión. Para medir la competencia en la estimación de la densidad del alumnado de la ESO, se pasó un ...
    • Optimized strain long-period fiber grating (LPFG) sensors operating at the dispersion turning point 

      Del Villar, Ignacio Upna; Fuentes, Omar; Chiavaioli, Francesco; Corres Sanz, Jesús María Upna; Matías Maestro, Ignacio Upna (IEEE, 2018)   Artículo / Artikulua  OpenAccess
      Two phenomena for enhancing the sensitivity of longperiod fiber gratings are combined toward an increase of the sensitivity to strain of this type of devices: the dispersion turning point (DTP) and the cladding diameter ...
    • Are previous suicide attempts a risk factor for completed suicide? 

      Goñi-Sarriés, Adriana; Blanco, Miriam; Azcárate, Leire; Peinado, Rubén; López-Goñi, José Javier Upna (Colegio Oficial de Psicólogos del Principado de AsturiasUniversidad de Oviedo, 2018)   Artículo / Artikulua  OpenAccess
      Background: A previous suicide attempt is a clinically relevant factor for completed suicide. In this paper people who committed suicide on their first attempt are compared with those who did so after previous attempts. ...
    • 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 ...
    • Label-free wavelength and phase detection based SMS fiber immunosensors optimized with cladding etching 

      Cardona-Maya, Yamile; Socorro Leránoz, Abián Bentor Upna; Del Villar, Ignacio Upna; Cruz, José Luis; Corres Sanz, Jesús María Upna; Botero Cadavid, J. F. (Elsevier, 2018)   Artículo / Artikulua
      The performance of E-SMS (Etched Singlemode-Multimode-Singlemode) optical fiber structures as immunosensors has been assessed by the implementation of antibody/antigen immunoassays. Through this procedure it has been ...
    • Long period fiber grating for biosensing: an improved design methodology to enhance add-layer sensitivity 

      Bandyopadhyay, Sankhyabrata; Del Villar, Ignacio Upna; Basumallick, Nandini; Biswas, Palas; Dey, Tanoy Kumar; Bandyopadhyay, Somnath (IEEE, 2018)   Artículo / Artikulua  OpenAccess
      We present our theoretical study on the design of LPFG sensor where its add-layer sensitivity is enhanced. addlayer sensitivity quantifies the sensitivity of the sensor to the changes taking place within few tens of ...
    • Oscillatory motions in restricted N-body problems 

      Alvarez-Ramírez, Martha; Rodríguez García, Antonio Upna; Palacián Subiela, Jesús Francisco Upna; Yanguas Sayas, Patricia Upna (Elsevier, 2018)   Artículo / Artikulua
      We consider the planar restricted N-body problem where the N−1 primaries are assumed to be in a central configuration whereas the infinitesimal particle escapes to infinity in a parabolic orbit. We prove the existence of ...
    • Thermoelectric generators for waste heat harvesting: a computational and experimental approach 

      Aranguren Garacochea, Patricia Upna; Araiz Vega, Miguel Upna; Astrain Ulibarrena, David Upna; Martínez Echeverri, Álvaro Upna (Elsevier, 2017)   Artículo / Artikulua
      Waste heat generation has a widespread presence into daily applications, however, due to the low-temperature grade which presents, its exploitation with the most common technologies is complicated. Thermoelectricity ...
    • Net thermoelectric power generation improvement through heat transfer optimization 

      Aranguren Garacochea, Patricia Upna; Astrain Ulibarrena, David Upna; Rodríguez García, Antonio Upna; Martínez Echeverri, Álvaro Upna (Elsevier, 2017)   Artículo / Artikulua
      Thermoelectric generation contributes to obtain a more sustainable energetic system giving its potential to harvest waste heat and convert it into electric power. In the present study a computational optimal net generation ...
    • Private sales clubs: a 21st century distribution channel 

      Betancourt, Roger R.; Cortiñas Ugalde, Mónica Upna; Chocarro Eguaras, Raquel Upna; Elorz Domezain, Margarita Upna; Múgica Grijalba, José Miguel Upna (Elsevier, 2017)   Artículo / Artikulua
      Private sales clubs are a novel service institution arising out of the Internet’s ability to allow an exclusively online channel to distribute out of season or out of fashion inventories to a large set of customers. They ...