Now showing items 1-20 of 444

    • Sources of linear and non-linear synchrony between brain and muscles: linear and non-linear CMC sources 

      Vidaurre, Carmen; Gómez Fernández, Marisol Upna; Nolte, Guido; Villringer, Arno; Carlowitz Ghori, Katherina von; Nikulin, Vadim V. (IEEE, 2020)   Contribución a congreso / Biltzarrerako ekarpena
      This manuscript shows that it is possible to find distinct sources of brain activity, at similar frequencies, arising from linear and non-linear interactions of the brain with the muscular system. Those sources were obtained ...
    • Automatic detection of high-voltage power lines in LiDAR surveys using data mining techniques 

      Chasco Hernández, Daniel; Sanz Delgado, José Antonio Upna; García Morales, Víctor; Álvarez-Mozos, Jesús Upna (Springer, 2020)   Contribución a congreso / Biltzarrerako ekarpena
      The correct classification of power lines in LiDAR point clouds has attracted the interest of the mapping community in the last years. The objective of this research is the detection and automatic extraction of high-voltage ...
    • Comparison of digital terrain models obtained with LiDAR and photogrammetry 

      Martínez Arregi, Alex; García Morales, Víctor; Álvarez-Mozos, Jesús Upna (Springer, 2020)   Contribución a congreso / Biltzarrerako ekarpena
      Airborne LiDAR sensors capture three-dimensional information of the Earth, useful for obtaining high accuracy Digital Terrain Models (DTM). The Spanish National Plan for Aerial Orthophotography (PNOA) is an initiative of ...
    • CMOS low-voltage indirect current feedback instrumentation amplifiers with improved performance 

      Carrillo, Juan M.; Domínguez, Miguel A.; Pérez Aloe, Raquel; Duque Carrillo, J. Francisco; Cruz Blas, Carlos Aristóteles de la Upna (IEEE, 2020)   Contribución a congreso / Biltzarrerako ekarpena
      Indirect current feedback (ICF) is a very common operation principle used in the design of CMOS instrumentation amplifiers (IA). The input and output transconductors required in an ICF IA usually consist on resistive-degenerated ...
    • Low power CMOS chopper preamplifier based on source-degeneration transconductors 

      Cinco Izquierdo, O. J.; Sanz Pascual, M. T.; Cruz Blas, Carlos Aristóteles de la Upna; Calvo López, B. (IEEE, 2020)   Contribución a congreso / Biltzarrerako ekarpena
      This paper describes the design of a low-power, low-noise flicker CMOS chopper preamplifier for sensor signal conditioning. The core amplifier and the Gm-C output low pass filter of the proposed fully differential preamplifier ...
    • A novel 0.3-0.31 THz GaAs-based transceiver with on-chip slotted metamaterial antenna based on SIW technology 

      Alibakhshikenari, Mohammad; Virdee, Bal S.; See, Chan H.; Abd-Alhameed, Raed; Falcone Lanas, Francisco Javier Upna; Limiti, Ernesto (IEEE, 2020)   Contribución a congreso / Biltzarrerako ekarpena
      This paper presents a novel on-chip antenna with fully integrated 0.3-0.31 THz transceiver is implemented on 0.5μm GaAs substrate, and comprises a voltage-controlled oscillator (VCO), a buffer amplifier, a modulator stage, ...
    • U2Eyes: a binocular dataset for eye tracking and gaze estimation 

      Porta Cuéllar, Sonia Upna; Bossavit, Benoît Upna; Cabeza Laguna, Rafael Upna; Larumbe Bergera, Andoni; Garde Lecumberri, Gonzalo; Villanueva Larre, Arantxa Upna (IEEE, 2019)   Contribución a congreso / Biltzarrerako ekarpena
      Theory shows that huge amount of labelled data are needed in order to achieve reliable classification/regression methods when using deep/machine learning techniques. However, in the eye tracking field, manual annotation ...
    • Overcome the limitations of performance parameters of on-chip antennas based on metasurface and coupled feeding approaches for applications in system-on-chip for THz integrated-circuits 

      Alibakhshikenari, Mohammad; Virdee, Bal S.; See, Chan H.; Abd-Alhameed, Raed; Falcone Lanas, Francisco Javier Upna; Limiti, Ernesto (IEEE, 2020)   Contribución a congreso / Biltzarrerako ekarpena
      This paper proposes a new solution to improve the performance parameters of on-chip antenna designs on standard CMOS silicon (Si.) technology. The proposed method is based on applying the metasurface technique and exciting ...
    • Automated reconfigurable antenna impedance for optimum power transfer 

      Alibakhshikenari, Mohammad; Virdee, Bal S.; See, Chan H.; Abd-Alhameed, Raed; Falcone Lanas, Francisco Javier Upna; Limiti, Ernesto (IEEE, 2020)   Contribución a congreso / Biltzarrerako ekarpena
      This paper presents an approach to implement an automatically tuning antenna for optimising power transfer suitable for software defined radio (SDR). Automatic tuning is accomplished using a closed loop impedance tuning ...
    • A management flight simulator of an intensive care unit 

      García de Vicuña Bilbao, Daniel; Mallor Giménez, Fermín Upna; Esparza, Laida; Mateo, Pedro (IEEE, 2019)   Contribución a congreso / Biltzarrerako ekarpena
      Management Flight Simulators (MFS) supply a simulated environment in which managers can learn from experience in a controlled setting. Although its use is usual in other areas, no such software has been developed to learn ...
    • A strategic multistage tactical two-stage stochastic optimization model for the airline fleet management problem 

      Serrano Hernández, Adrián Upna; Cadarso, Luis; Faulín Fajardo, Javier Upna (Elsevier, 2020)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      This work proposes stochastic optimization for the airline fleet management problem, considering uncertainty in the demand, operational costs, and fares. In particular, a multistage tree is proposed, compounded of strategic ...
    • Hydrogen educational activities developed by APERNA: a renewable-energy student association 

      Berrueta Irigoyen, Alberto Upna; San Martín Biurrun, Idoia Upna; Samanes Pascual, Javier Upna; Pascual Miqueleiz, Julio María Upna; Barrios Rípodas, Ernesto Upna; Parra Laita, Íñigo de la Upna; Urtasun Erburu, Andoni Upna; Sanchís Gúrpide, Pablo Upna; Ursúa Rubio, Alfredo Upna (Asociación Española del Hidrógeno, 2016)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this paper, we present APERNA, a recently-created student association at Public University of Navarre (UPNA) with the aim of promotion of renewable energies.
    • Propuesta para la mejora de la adquisición de la noción de función por estudiantes de 3º ESPA 

      Catena, Miguel; Abaurrea Larrayoz, Jaione; Wilhelmi, Miguel R. (2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      En este trabajo se puede encontrar una propuesta para mejorar el rendimiento académico de los estudiantes de 3º ESPA, concretamente, los de modalidad a distancia. Para ello, se han analizado las restricciones institucionales ...
    • DC capacitance reduction in three-phase photovoltaic inverters by using virtual impedance emulation 

      Urtasun Erburu, Andoni Upna; Sanchís Gúrpide, Pablo Upna; Marroyo Palomo, Luis Upna (IEEE, 2019)   Contribución a congreso / Biltzarrerako ekarpena
      DC voltage regulation in grid-connected three-phase PV inverters is a fundamental requirement. In order to reduce the influence of the PV non-linear behavior and ensure stability in the whole operating range, the input ...
    • Single feedback regulation of the AC voltage for high-power inverters under stand-alone operation 

      Erdocia Zabala, Ioseba; Urtasun Erburu, Andoni Upna; Marroyo Palomo, Luis Upna (IEEE, 2019)   Contribución a congreso / Biltzarrerako ekarpena
      Energy-storage inverters under stand-alone operation must control the output voltage. However, existing methods for instantaneous voltage regulation are not suitable for high-power inverters due to their limited sampling ...
    • Influence of recording technology on the determination of binaural psychoacoustic indicators in soundscape investigations 

      San Martín Murugarren, Ricardo Upna; Arana Burgui, Miguel Upna; Ezcurra Guisasola, María Amaya; Valencia Leoz, Ana (Institute of Noise Control Engineering, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      The evaluation of soundscapes is mainly carried out through field surveys, using soundwalking methodologies. Through rating scales and annotation of comments, the experiences and expectations of the participants are ...
    • An efficient algorithm for the evaluation of tonality and the determination of the tonal frequency according to IEC 61400-11 

      Arana Burgui, Miguel Upna; San Martín Murugarren, Ricardo Upna; Ezcurra Guisasola, María Amaya; Valencia Leoz, Ana; Llorente, Elena (Institute of Noise Control Engineering, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      The terms of tonality and tonal audibility of the noise emitted by wind turbines are defined and described in the standard IEC 61400-11. The procedure for tonality assessment at different wind speeds based on the narrowband ...
    • OWA operators based on admissible permutations 

      Paternain Dallo, Daniel Upna; Jin, LeSheng; Mesiar, Radko; Vavríková, Lucia; Bustince Sola, Humberto Upna (IEEE, 2019)   Contribución a congreso / Biltzarrerako ekarpena
      In this work we propose a new OWA operator defined on bounded convex posets of a vector-lattice. In order to overcome the non-existence of a total order, which is necessary to obtain a non-decreasing arrangement of the ...
    • Comparison of fourth-harmonic and combined doubler/subharmonic mixer with integrated MMIC based local oscillator 

      Pérez Escudero, José Manuel Upna; Quemada Mayoral, Carlos Upna; Gonzalo García, Ramón Upna; Ederra Urzainqui, Íñigo Upna (IEEE, 2019)   Contribución a congreso / Biltzarrerako ekarpena
      In this paper a comparison between a fourth harmonic mixer and a combined doubler/subharmonic mixer based on Schottky diodes working at 300 GHz with MMIC Local Oscillator (LO) integrated in a single enclosing is presented. ...
    • On the requirements of the power converter for second-life lithium-ion batteries 

      Berrueta Irigoyen, Alberto Upna; San Martín Biurrun, Idoia Upna; Pascual Miqueleiz, Julio María Upna; Sanchís Gúrpide, Pablo Upna; Ursúa Rubio, Alfredo Upna (IEEE, 2019)   Contribución a congreso / Biltzarrerako ekarpena
      The use of lithium-ion batteries is increasing year after year, especially in the automotive sector. Given the high requirements of electric vehicles, their energy storage systems are discarded when they still have around ...