• 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 ...
    • 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, ...
    • Suitability of Totora (Schoenoplectus californicus (C.A. Mey.) Soják) for its use in constructed wetlands in areas polluted with heavy metals 

      Blanco Vaca, Juan Antonio Upna (MDPI, 2019)   Artículo / Artikulua  OpenAccess
      Schoenoplectus californicus subsp. tatora (totora) is an endemic plant from wetlands in South America´s Altiplano region. In the endorheic Titicaca-Desaguadero-Poopó-Salar de Coipasa system (TDPS), totora can be found along ...
    • 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 ...
    • 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. ...
    • Possible role of chondroitin sulphate and glucosamine for primary prevention of colorectal cancer. Results from the MCC-Spain study 

      Ibáñez Sanz, Gemma; Díez Villanueva, Anna; Vilorio Marqués, Laura; Gracia, Esther; Aragonés, Nuria; Olmedo Requena, Rocío; Llorca, Javier; Vidán, Juana; Amiano, Pilar; Nos, Pilar; Fernández Tardón, Guillermo; Rada, Ricardo; Chirlaque, María Dolores; Guinó, Elisabet; Dávila Batista, Verónica; Castaño Vinyals, Gemma; Pérez Gómez, Beatriz; Mirón Pozo, Benito; Dierssen Sotos, Trinidad; Etxeberria Andueza, Jaione Upna; Molinuevo, Amaia; Álvarez Cuenllas, Begoña; Kogevinas, Manolis; Pollán, Marina; Moreno, Víctor (Springer Nature, 2018)   Artículo / Artikulua  OpenAccess
      A safe and effective colorectal cancer (CRC) chemoprevention agent remains to be discovered. We aim to evaluate the association between the use of glucosamine and/or chondroitin sulphate and risk of colorectal cancer (CRC) ...
    • 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 ...
    • Dual-probe linearly-configured BOCDA system with enlarged modulation amplitude 

      Mariñelarena Ollacarizqueta, Jon Upna; Kim, Yong Hyun; Loayssa Lara, Alayn Upna; Song, Kwang Yong (Optical Society of America, 2018)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      We present and experimentally demonstrated a linearly-configured Brillouin optical correlation domain analysis (LC-BOCDA) system that allows large modulation amplitude (Δf) based on a dual probe wave and the control of ...
    • Pulse coding linearization for Brillouin optical time-domain analysis sensors 

      Mariñelarena Ollacarizqueta, Jon Upna; Iribas Pardo, Haritz Upna; Loayssa Lara, Alayn Upna (Optical Society of America, 2018)   Artículo / Artikulua  OpenAccess
      We introduce a simple method to extend the performance of pulse coding techniques in their application to Brillouin optical time-domain analysis sensors (BOTDA). It is based on applying a simple logarithmic processing on ...
    • "Loa sacramental de los títulos de comedias” de Lope de Vega: estudio y edición crítica 

      Rodríguez Ortega, Davinia (Universidad Autónoma de Barcelona, 2018)   Artículo / Artikulua  OpenAccess
      El presente artículo ofrece la edición crítica de la «Loa sacramental de los títulos de comedias» de Lope de Vega a partir de los testimonios impresos conservados. Asimismo, se completa el estudio con una breve introducción ...
    • Technical and environmental characterization of hydraulic and alkaline binders 

      Espuelas Zuazu, Sandra; Echeverría, Angel María; Marcelino Sádaba, Sara; Prieto Cobo, Eduardo; Seco Meneses, Andrés (Elsevier, 2018)   Artículo / Artikulua
      Portland cement is a widely used binder in construction and building applications because of its good properties. Despite its convenience as construction material, the social demands and policies trends are requesting a ...
    • The regulon of the RNA chaperone CspA and its auto-regulation in Staphylococcus aureus 

      Caballero Sánchez, Carlos; Menéndez Gil, Pilar; Catalán Moreno, Arancha; Vergara Irigaray, Marta Upna; García Martínez, Begoña Upna; Segura, Víctor; Irurzun Domínguez, Naiara; Villanueva San Martín, Maite Upna; Ruiz de los Mozos Aliaga, Igor Upna; Solano Goñi, Cristina Upna; Lasa Uzcudun, Íñigo Upna; Toledo Arana, Alejandro Upna (Oxford University Press, 2018)   Artículo / Artikulua  OpenAccess
      RNA-binding proteins (RBPs) are essential to finetune gene expression. RBPs containing the coldshock domain are RNA chaperones that have been extensively studied. However, the RNA targets and specific functions for ...
    • Parameter-independent control for battery chargers based on virtual impedance emulation 

      Urtasun Erburu, Andoni Upna; Berrueta Irigoyen, Alberto; Sanchís Gúrpide, Pablo Upna; Marroyo Palomo, Luis Upna (IEEE, 2018)   Artículo / Artikulua
      An effective battery voltage regulation is fundamental to extend battery lifetime and to avoid overvoltage. However, the design of this regulation is complicated due to the wide battery impedance range, which, when dealing ...
    • Routing with classical corrugated waveguide low-pass filters with embedded bends 

      Teberio Berdún, Fernando Upna; Percaz Ciriza, Jon Mikel Upna; Arregui Padilla, Iván Upna; Martín Iglesias, Petronilo; Lopetegui Beregaña, José María Upna; Gómez Laso, Miguel Ángel Upna; Arnedo Gil, Israel Upna (EMW Publishing, 2018)   Artículo / Artikulua  OpenAccess
      A very simple design method to embed routing capabilities in classical corrugated filters is presented in this paper. The method is based on the calculation of the heights and lengths of the so-called filters design ...
    • Asymptotic and convergent expansions for solutions of third-order linear differential equations with a large parameter 

      Ferreira, Chelo; López García, José Luis; Pérez Sinusía, Ester (Shanghai Normal UniversityWilmington Scientific Publisher, 2018)   Artículo / Artikulua  OpenAccess
      In previous papers [6–8,10], we derived convergent and asymptotic expansions of solutions of second order linear differential equations with a large parameter. In those papers we generalized and developed special cases not ...
    • Convergent expansions of the Bessel functions in terms of elementary functions 

      López García, José Luis; Pagola Martínez, Pedro Jesús (Springer US, 2018)   Artículo / Artikulua  OpenAccess
      We consider the Bessel functions Jν (z) and Yν (z) for ν > −1/2 and z ≥ 0. We derive a convergent expansion of Jν (z) in terms of the derivatives of (sin z)/z, and a convergent expansion of Yν (z) in terms of derivatives ...
    • Convergent expansions of the confluent hypergeometric functions in terms of elementary functions 

      Bujanda Cirauqui, Blanca Upna; López García, José Luis; Pagola Martínez, Pedro Jesús (American Mathematical Society, 2018)   Artículo / Artikulua  OpenAccess
      We consider the confluent hypergeometric function M(a, b; z) for z ∈ C and Rb >Ra > 0, and the confluent hypergeometric function U(a, b; z) for b ∈ C, Ra > 0, and Rz > 0. We derive two convergent expansions of M(a, b; z); ...
    • Machines and energy. Energy capital ratios in Europe and Latin America 1875 - 1970' 

      Ducoing, Cristián; Gales, Ben; Hölsgens, Rick; Rubio Varas, María del Mar Upna (Taylor & Francis, 2018)   Artículo / Artikulua  OpenAccess
      The relationship between energy and capital is one of the most important aspects of modern economic growth. Machines need energy to produce all the goods we enjoy; energy would be far less useful for humankind in absence ...
    • The use of two-point Taylor expansions in singular one-dimensional boundary value problems I 

      Ferreira, Chelo; López García, José Luis; Pérez Sinusía, Ester (Elsevier, 2018)   Artículo / Artikulua
      We consider the second-order linear differential equation (x + 1)y′′ + f(x)y′ + g(x)y = h(x) in the interval (−1, 1) with initial conditions or boundary conditions (Dirichlet, Neumann or mixed Dirichlet-Neumann). The ...
    • Convergent and asymptotic methods for second-order difference equations with a large parameter 

      Ferreira, Chelo; López García, José Luis; Pérez Sinusía, Ester (Springer, 2018)   Artículo / Artikulua
      We consider the second-order linear difference equation y(n+2)−2ay(n+1)−Λ2y(n)=g(n)y(n)+f(n)y(n+1) , where Λ is a large complex parameter, a≥0 and g and f are sequences of complex numbers. Two methods are proposed to find ...