Now showing items 1-20 of 450

    • A biased-randomized learnheuristic for solving the team orienteering problem with dynamic rewards 

      Reyes-Rubiano, Lorena Silvana; Juan, Ángel Alejandro; Bayliss, C.; Panadero, J.; Faulín Fajardo, Javier Upna; Copado, P. (Elsevier, 2020)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this paper we discuss the team orienteering problem (TOP) with dynamic inputs. In the static version of the TOP, a fixed reward is obtained after visiting each node. Hence, given a limited fleet of vehicles and a threshold ...
    • 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 ...
    • Sources of linear and non-linear synchrony between brain and muscles: linear and non-linear CMC sources 

      Vidaurre, Carmen Upna; 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 ...
    • 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 ...
    • 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 ...
    • 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 ...
    • 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, ...
    • 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 ...
    • Evolution of L-fuzzy contexts associated with criteria 

      Alcalde, Cristina; Burusco Juandeaburre, Ana Upna (Springer, 2020)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      This paper will delve deeper into the general study of the L-fuzzy contexts associated with criteria analyzing situations with a known evolution over time. These criteria may be independent or dependent on each other. We ...
    • Micro-drilled optical fiber for enhanced laser strain sensors 

      Pérez Herrera, Rosa Ana Upna; Bravo Acha, Mikel Upna; Roldán Varona, Pablo; Leandro González, Daniel Upna; Rodríguez Cobo, L.; López Higuera, José Miguel; López-Amo Sáinz, Manuel Upna (SPIE, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this work, we present an experimental measurement of temperature and strain sensitivities of a micro-drilled optical fiber (MDOF). The MDOF consisted of a quasi-randomly distributed reflector along a single mode fiber ...
    • Multiplexing optical fiber Fabry-Perot interferometers based on air-microcavities 

      Pérez Herrera, Rosa Ana Upna; Novais, S.; Bravo Acha, Mikel Upna; Leandro González, Daniel Upna; Silva, Susana; Frazão, Orlando; López-Amo Sáinz, Manuel Upna (SPIE, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this work we demonstrate the multiplexing capability of new optical fiber Fabry-Perot interferometers based on airmicrocavities using a commercial FBG interrogator. Three optimized air-microcavity interferometer sensors ...
    • Structural health monitoring of solar trackers using distributed fiber optic sensors 

      Mariñelarena Ollacarizqueta, Jon Upna; Mompó Roselló, Juan José Upna; Zurita Gabasa, Jesús Upna; Urricelqui Polvorinos, Javier Upna; Júdez Colorado, Aitor Upna; López-Amo Sáinz, Manuel Upna; Jiménez Romero, Sergio; Achaerandio, Álvaro; Loayssa Lara, Alayn Upna (SPIE, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      We demonstrate the application of a novel type of distributed fiber optic sensors (DFOSs) to dynamically monitor the effects of wind on solar tracker structures used in photovoltaic power stations. This DFOS is based on ...
    • Investigation on the working point of slope-assisted dynamic Brillouin distributed fiber sensing 

      Feng, Cheng; Mariñelarena Ollacarizqueta, Jon Upna; Schneider, Thomas (SPIE, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this paper, an investigation on the working point of slope-assisted dynamic distributed Brillouin sensing is presented. A comparison has been carried out between the sensing performances achieved at the inflection point ...
    • Latest research on long-range Brillouin distributed sensing 

      Loayssa Lara, Alayn Upna; Urricelqui Polvorinos, Javier Upna; Iribas Pardo, Haritz Upna; Mariñelarena Ollacarizqueta, Jon Upna; Mompó Roselló, Juan José Upna (SPIE, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      We review the latest developments in long-range Brillouin optical time-domain analysis sensors. The factors that impair the performance of these sensors, particularly in terms of their distance range, are discussed together ...
    • Directions of directional, ordered directional and strengthened ordered directional increasingness of linear and ordered linear fusion operators 

      Sesma Sara, Mikel Upna; Marco Detchart, Cedric Upna; Lafuente López, Julio Upna; Roldán, Antonio; Mesiar, Radko; Bustince Sola, Humberto Upna (IEEE, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this work we discuss the forms of monotonicity that have been recently introduced to relax the monotonicity condition in the definition of aggregation functions. We focus on directional, ordered directional and strengthened ...
    • High-speed analysis of SMB2 file sharing traffic without TCP stream reconstruction 

      Berrueta Irigoyen, Eduardo Upna; Morató Osés, Daniel Upna; Magaña Lizarrondo, Eduardo Upna; Izal Azcárate, Mikel Upna (IEEE, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      This paper presents a file sharing traffic analysis methodology for Server Message Block (SMB), a common protocol in the corporate environment. The design is focused on improving the traffic analysis rate that can be ...
    • Energy harvesting approaches in IoT scenarios with very low ambient energy 

      López Martín, Antonio Upna; Algueta-Miguel, Jose M. Upna; Matías Maestro, Ignacio Upna (European Association for the Development of Renewable Energy, Environment and Power Quality (EA4EPQ), 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      The feasibility of multi-source energy harvesting in Internet of Things (IoT) scenarios with low and intermittent ambient energy is addressed. As a relevant case study, application to a smart cargo container system is ...
    • DC capacitance reduction in three-phase photovoltaic inverters by using virtual impedance emulation 

      Urtasun Erburu, Andoni Upna; Sanchis 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 ...