Ara es mostren els items 11-30 de 31

    • Heating of a tissue by near nield exposure to a dipole: a model analysis 

      Riu Costa, Pere Joan; Foster, Kenneth R. (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1999-08-31)
      Article
      Accés obert
      We report a numerical study of the induced electric fields and specific absorption rate (SAR) produced by microwave radiation from a half-wavelength dipole near tissue models, and the resulting transient and steady-state ...
    • In vivo electrical bioimpedance characterization of human lung tissue during the bronchoscopy procedure. A feasibility study 

      Sánchez Terrones, Benjamín; Vandersteen, Gerd; Martín Robles, Irene; Castillo Villegas, Diego; Torrego Fernández, Alfons; Riu Costa, Pere Joan; Schoukens, Johan; Bragós Bardia, Ramon (2013-07)
      Article
      Accés restringit per política de l'editorial
      Lung biopsies form the basis for the diagnosis of lung cancer. However, in a significant number of cases bronchoscopic lung biopsies fail to provide useful information, especially in diffuse lung disease, so more aggressive ...
    • Initial analysis of SAR from a cell phone inside a vehicle by numerical computation. 

      Anzaldi, Gabriel; Silva Martínez, Fernando; Fernández Chimeno, Mireya; Quílez Figuerola, Marcos; Riu Costa, Pere Joan (Institution of Electrical and Electronics Engineers, 2007-05-31)
      Article
      Accés obert
      The purpose of this paper is to analyze the influence of the metallic structures of a realistic car body frame on the specific absorption rate (SAR) produced by a cell phone when a complete human body model is placed at ...
    • Minimally invasive in vivo human lung tissue bioimpedance measurements during the bronchoscopy procedure 

      Sánchez Terrones, Benjamín; Vandersteen, G.; Martin, I.; Castillo, David; Torrego, A.; Riu Costa, Pere Joan; Schoukens, J.; Bragós Bardia, Ramon (IEEE, 2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Respiratory diseases, which include diseases of the lung, pleura, bronchial tree, trachea, upper respiratory tract and of the respiratory muscles and nerves, are a common and important cause of illness and death among the ...
    • Minimally invasive lung tissue differentiation using electrical impedance spectroscopy: a comparison of the 3- and 4-electrode methods 

      Company Se, Georgina; Nescolarde Selva, Lexa Digna; Pajares Ruiz, Virginia; Torrego Fernández, Alfons; Riu Costa, Pere Joan; Rosell Ferrer, Francisco Javier; Bragós Bardia, Ramon (Institute of Electrical and Electronics Engineers (IEEE), 2021-12-28)
      Article
      Accés obert
      Multiple imaging techniques are used for the diagnosis of lung diseases. The choice of a technique depends on the suspected diagnosis. Computed tomography (CT) of the thorax and positron emission tomography (PET) are imaging ...
    • Numerical assessment in aeronautics for electromagnetic environmental effects 

      Ruiz-Cabello Nuñez, Miguel David; Fernández Romero, Sergio; Pous Solà, Marc; Silva Martínez, Fernando; Fernández Chimeno, Mireya; Riu Costa, Pere Joan; Jauregui Telleria, Ricardo Ignacio (2018-01-01)
      Capítol de llibre
      Accés restringit per política de l'editorial
      Electromagnetic Compatibility for Space Systems Design is a critical scholarly resource that examines the applications of electromagnetic compatibility and electromagnetic interference in the space industry. Featuring ...
    • Performance assessment of EIT measurement systems 

      Riu Costa, Pere Joan; Antón Cardona, Daniel (2010)
      Text en actes de congrés
      Accés obert
      EIT acquisition systems, when regarded as measuring instruments, can be characterized by their inherent characteristics: reproducibility, repeatability and discrimination. The ultimate limit to all three is noise, whether ...
    • Power line impedance characterization of automotive loads at the power line communication frequency range 

      Aragon Homar, Marc; Salinas, Mauricio; Riu Costa, Pere Joan; Silva Martínez, Fernando (2010)
      Text en actes de congrés
      Accés obert
      A complete system able to measure complex impedance, both in magnitude and phase, of an automotive electrical load is designed. The development of such system emerged from the need of measure the impedance of these loads ...
    • Propagation of measurement noise through backprojection reconstruction in electrical impedance tomography 

      Frangi Caregnato, Alejandro; Riu Costa, Pere Joan; Rosell Ferrer, Francisco Javier; Viergever, Max A. (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2002-06-30)
      Article
      Accés obert
      A framework to analyze the propagation of measurement noise through backprojection reconstruction algorithms in electrical impedance tomography (EIT) is presented. Two measurement noise sources were considered: noise in ...
    • Sistemas de instrumentación 

      Riu Costa, Pere Joan; Rosell Ferrer, Francisco Javier; Ramos Castro, Juan José (Edicions UPC, 1995)
      Llibre
      Accés restringit a la comunitat UPC
      El núcleo de la obra contiene la descripción de los protocolos físicos y lógicos necesarios para construir un sistema de instrumentación a base de dispositivos comerciales, conectados con un bus IEEE-488 o VXI. Se describen ...
    • Sistemas de test automático : curso de laboratorio 

      Fernández Chimeno, Mireya; García González, Miguel Ángel; Ramos Castro, Juan José; Riu Costa, Pere Joan; Rosell Ferrer, Francisco Javier (Edicions UPC, 1999)
      Llibre
      Accés restringit a la comunitat UPC
      Este libro es un curso de laboratorio formado por 9 prácticas, mediante las cuales se pretende conseguir tres objetivos: Dar conocer a los estudiantes de electrónica una herramienta real y de amplia aceptación industrial ...
    • SIVA UAV: a case study for the EMC analysis of composite air vehicles 

      Cabello, Miguel R.; Vallina Fernández, Sergio Manuel; Pous Solà, Marc; Pascual, Enrique; Angulo, Luis D.; López, Patricia; Riu Costa, Pere Joan; Gutierrez, Guadalupe G.; Mateos, Daniel; Poyatos, David; Fernández Chimeno, Mireya; Alvarez, Jesus; Pantoja, Mario F.; Añón, Manuel; Silva Martínez, Fernando; Bretones, Amelia R.; Trallero, Rafael; Nuño Fernández, Luis; Escot, David; Martin, Rafael G.; Garcia, Salvador G. (2017-08-01)
      Article
      Accés obert
      The increased use of carbon-fiber composites in unmanned aerial vehicles is a challenge for their EMC assessment by numerical solvers. For accurate and reliable simulations, numerical procedures should be tested not only ...
    • Skin impedance from 1 Hz to 1 MHz 

      Rosell Ferrer, Francisco Javier; Colominas i Balagué, Josep; Riu Costa, Pere Joan; Pallàs-Areny, Ramon; Webster, John G. (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1988-08-01)
      Article
      Accés obert
      We measured the impedance of skin coated with gel, but otherwise unprepared from 1 Hz to 1 MHz at ten sites on the thorax, leg, and forehead of ten subjects. For a 1 cm2 area, the 1 Hz impedance varied from 10 kΩ to 1 MΩ, ...
    • Tidal Volume (TV) post-process obtained with electrical impedance tomography on a group of chronic obstructive pulmonary disease (COPD) patients. Use of adjust equations 

      Balleza, Marco; Antón Cardona, Daniel; Casan, Pere; Riu Costa, Pere Joan (2010)
      Text en actes de congrés
      Accés obert
      Equations used to estimate ventilation out of EIT images, validated on healthy volunteers show a significant bias and a larger variance when were applied on a COPD patients group. The differences in estimation values were ...
    • Tidal volume monitoring by a set of tetrapolar impedance measurements selected from the 16-electrodes arrangement used inelectrical impedance tomography (EIT) technique. Calibration equations in a group of healthy males 

      Balleza Ordaz, José Marco; Pérez Alday, Erick Andrés; Vargas Luna, José Miguel; Kashina, Svetlana; Huerta Franco, María-Raquel; Torres González, Luis Adolfo; Riu Costa, Pere Joan (2016-03-01)
      Article
      Accés obert
      Previously, our research group obtained a set of calibration equations for being used by an electricalimpedance tomograph (EIT). All equations transform the impedance changes into a measurable volumesignal in a group of ...
    • tidal volume monitoring by electrical impedance tomography (EIT) using different regions of interest (ROI): calibration equations 

      Balleza Ordaz, José Marco; Vargas Luna, Miguel; Pérez Alday, Erick Andrés; Riu Costa, Pere Joan (2015-04-01)
      Article
      Accés obert
      set of calibration equations was previously obtained to transform the lung impedance changes obtained by electrical impedance tomography (EIT), using all frame's elements, into a measurable volume signal. In order to study ...
    • Tidal volume monitoring with electrical impedance tomography (EIT) on COPD patients : relationship between EIT and diffusion lung transfer (DL,CO) 

      Balleza, Marco; Casan, P.; Riu Costa, Pere Joan (Springer Verlag, 2009-09)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Equations used to estimate ventilation out of EIT images, validated on healthy volunteers show a significant bias and a larger variance when applied to COPD patients. The differences in estimation values were found to be ...
    • Tomografía de impedancia eléctrica en la lesión pulmonar aguda 

      Jordi, Riera; Riu Costa, Pere Joan; Casan, Pere; Masclans, Josep Ramon (2011-11-01)
      Article
      Accés obert
      La tomografía de impedancia eléctrica se ha descrito como un nuevo método de monitorización en el paciente crítico en ventilación mecánica. Recientemente ha cobrado especial interés, debido a su aplicabilidad para la ...
    • Transient FDTD simulation validation 

      Jauregui Tellería, Ricardo; Riu Costa, Pere Joan; Silva Martínez, Fernando (2010)
      Text en actes de congrés
      Accés obert
      In computational electromagnetic simulations, most validation methods have been developed until now to be used in the frequency domain. However, the EMC analysis of the systems in the frequency domain many times is not ...
    • UAVEMI project: numerical and experimental EM immunity assessment of UAV for HIRF and lightning indirect effects 

      González García, Salvador; Silva Martínez, Fernando; Escot, David; Pascual, Enrique; Pantoja, Mario F.; Riu Costa, Pere Joan; Añón, Manuel; Álvarez, Jesús; Cabello, M.; Pous Solà, Marc; Fernández, Sergio; Trallero, Rafael; Poyatos, David; Nuño Fernández, Luis (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The UAVEMI project, funded by the Spanish Ministry of Economy and Competitiveness, gathers a consortium formed by several research and development institutions and one industrial partner. The main goal is to develop ...