Bogonez Franco, Francisco
Total activity: 33
Department
Department of Electronic Engineering
E-mail
paco.bogonezestudiant.upc.edu
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Scientific and technological production
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1 to 33 of 33 results
  • Online monitoring of myocardial bioprosthesis for cardiac repair

     Prat Vidal, Cristina; Gálvez Montón, Carolina; Sánchez Terrones, Benjamín; Bragos Bardia, Ramon; Bogonez Franco, Francisco; Puig Sanvicens, Verónica
    International journal of cardiology
    Vol. 174, num. 3, p. 654-661
    DOI: 10.1016/j.ijcard.2014.04.181
    Date of publication: 2014-07-01
    Journal article

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    Background/objectives The aim of this study was to develop a myocardial bioprosthesis for cardiac repair with an integrated online monitoring system. Myocardial infarction (MI) causes irreversible myocyte loss and scar formation. Tissue engineering to reduce myocardial scar size has been tested with variable success, yet scar formation and modulation by an engineered graft is incompletely characterized. Methods Decellularized human pericardium was embedded using self-assembling peptide RAD16-I with or without GFP-labeled mediastinal adipose tissue-derived progenitor cells (MATPCs). Resulting bioprostheses were implanted over the ischemic myocardium in the swine model of MI (n = 8 treated and n = 5 control animals). For in vivo electrical impedance spectroscopy (EIS) monitoring, two electrodes were anchored to construct edges, covered by NanoGold particles and connected to an impedance-based implantable device. Histological evaluation was performed to identify and characterize GFP cells on post mortem myocardial sections. Results Pluripotency, cardiomyogenic and endothelial potential and migratory capacity of porcine-derived MATPCs were demonstrated in vitro. Decellularization protocol efficiency, biodegradability, as well as in vitro biocompatibility after recellularization were also verified. One month after myocardial bioprosthesis implantation, morphometry revealed a 36% reduction in infarct area, Ki67+-GFP+-MATPCs were found at infarct core and border zones, and bioprosthesis vascularization was confirmed by presence of Griffonia simplicifolia lectin I (GSLI) B4 isolectin+-GFP+-MATPCs. Electrical impedance measurement at low and high frequencies (10 kHz-100 kHz) allowed online monitoring of scar maturation. Conclusions With clinical translation as ultimate goal, this myocardial bioprosthesis holds promise to be a viable candidate for human cardiac repair.

  • Effect of driver to gate coupling circuits on EMI produced by SiC MOSFETS

     Balcells Sendra, Josep; Bogonez Franco, Francisco
    International Symposium on Electromagnetic Compatibility
    p. 209-214
    Presentation's date: 2013-09-03
    Presentation of work at congresses

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    This work presents a study of the influence of different gate driver circuits on the switching behavior and EMI produced by SiC MOSFET devices used in a boost converter. The paper includes several simulations of switching behavior using different VGS voltage levels and different passive RCD (Resistance Capacitor Diode) circuits to interface the driver to the SiC MOS gate and several tests of conducted and radiated EMI for each one of the interface circuits. The paper also includes a comparison of both aspects (switching and EMI) when using different gate voltage levels. The study reveals that gate voltage has little impact on switching behavior and therefore on conducted and radiated EMI, while gate RCD coupling circuits have a noticeable impact. The EMI reduction, when using the adequate driver-gate circuit may be in the order of 10 dB at certain frequencies in the conducted band and up to 20 dB for certain frequencies in the radiated band.

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    Reference values of the bioimpedance vector components in a Caribbean population  Open access

     Nescolarde Selva, Lexa Digna; Núñez, Ana; Bogonez Franco, Francisco; Lara, Alcibiades; Vaillant, Guillermo; Morales, Ricardo; Rosell Ferrer, Francisco Javier
    e-SPEN, the European e-Journal of Clinical Nutrition and Metabolism
    Vol. 8, num. 4, p. e141-e144
    DOI: 10.1016/j.clnme.2013.04.004
    Date of publication: 2013-07-23
    Journal article

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    Background & aims Application of bioelectrical impedance vector analysis (BIVA) requires comparison of an impedance vector to reference intervals derived from healthy subjects. The aim of this work is to obtain reference nomograms of bioimpedance vectors from healthy subjects living in Santiago de Cuba. Methods A sample of 4030 healthy people, ages 2¿80 y, was measured using a tetra-polar whole-body bioimpedance analyzer at 50 kHz. BIVA method uses the 50, 75 and 95% confidence ellipses of reference populations to classify individual and group vectors. Results The 95% confidence ellipses derived among boys and girls (2¿12 y) were similar (P > 0.05) with significant gender differences (P < 0.05) throughout adulthood. Furthermore, we can observe a progressive decrease in the modulus of the impedance with age with the same phase angle from 13 to 59 y. However, in both genders on subjects >60 y we also observed a phase downfall, possibly due to the reduction of mass and structure, by sarcopenia. Conclusions Reference ellipses are provided, distributed in six sets resulting in age separation intervals (not in gender) for children from 2 to 12 y; two gender specific reference ellipses for teenagers in the range of 13¿16 y, for adults from 17 to 59 y and for elderly people from 60 to 80 y.

    Background & aims Application of bioelectrical impedance vector analysis (BIVA) requires comparison of an impedance vector to reference intervals derived from healthy subjects. The aim of this work is to obtain reference nomograms of bioimpedance vectors from healthy subjects living in Santiago de Cuba. Methods A sample of 4030 healthy people, ages 2–80 y, was measured using a tetra-polar whole-body bioimpedance analyzer at 50 kHz. BIVA method uses the 50, 75 and 95% confidence ellipses of reference populations to classify individual and group vectors. Results The 95% confidence ellipses derived among boys and girls (2–12 y) were similar (P > 0.05) with significant gender differences (P < 0.05) throughout adulthood. Furthermore, we can observe a progressive decrease in the modulus of the impedance with age with the same phase angle from 13 to 59 y. However, in both genders on subjects >60 y we also observed a phase downfall, possibly due to the reduction of mass and structure, by sarcopenia. Conclusions Reference ellipses are provided, distributed in six sets resulting in age separation intervals (not in gender) for children from 2 to 12 y; two gender specific reference ellipses for teenagers in the range of 13–16 y, for adults from 17 to 59 y and for elderly people from 60 to 80 y.

  • An implantable bioimpedance monitor using 2.45 GHz band for telemetry

     Bogonez Franco, Francisco; Nescolarde Selva, Lexa Digna; Gálvez Montón, Carolina; Bragos Bardia, Ramon; Rosell Ferrer, Francisco Javier
    Physiological measurement
    Vol. 34, num. 1, p. 1-16
    DOI: doi:10.1088/0967-3334/34/1/1
    Date of publication: 2013-01
    Journal article

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  • EMI comparison between Si and SiC technology in a boost converter

     Bogonez Franco, Francisco; Balcells Sendra, Josep
    International Symposium on Electromagnetic Compatibility
    DOI: 10.1109/EMCEurope.2012.6396739
    Presentation's date: 2012-09-18
    Presentation of work at congresses

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  • Hybrid modulator for power converters in parallel topology

     Mon Gonzalez, Juan; Gonzalez Diez, David; Balcells Sendra, Josep; Gago Barrio, Javier; Bogonez Franco, Francisco
    International Power Electronics and Motion Control Conference
    p. DS2c.1-1-DS2c.1-7
    DOI: 10.1109/EPEPEMC.2012.6397285
    Presentation's date: 2012-09-04
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  • Influence of electrode mismatch on cole parameter estimation from total right side electrical bioimpedance spectroscopy measurements

     Buendía, Rubén; Bogonez Franco, Francisco; Nescolarde Selva, Lexa Digna; Seoane, Fernando
    Medical engineering and physics
    Vol. 34, num. 7, p. 1024-1028
    DOI: 10.1016/j.medengphy.2012.05.011
    Date of publication: 2012-08-31
    Journal article

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    Towards on line monitoring the evolution of the myocardium infarction scar with an implantable electrical impedance spectrum monitoring system.  Open access

     Sánchez Terrones, Benjamín; Guasch, Assumpció; Bogonez Franco, Francisco; Gálvez-Montón, C.; Puig, V.; Prat-Vidal, C.; Semino, C.E.; Bayés Genis, Antoni; Bragos Bardia, Ramon
    IEEE Engineering in Medicine and Biology Society
    p. 3223-3226
    Presentation's date: 2012-08-29
    Presentation of work at congresses

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    The human heart tissue has a limited capacity for regeneration. Tissue and cellular therapies based on the use of stem cells may be useful alternatives to limit the size of myocardial infarction. In this paper, the preliminary results from an experimental campaign for on-line monitoring of myocardium scar infarction are presented. This study has been carried out under a research project that has as main objective the development and application of a bioactive patch implant for regeneration of myocardial infarction. Electrical Impedance Spectroscopy (EIS) has been chosen as a tissue state monitoring technique. What is presented in this communication is the first results of an implantable EIS measurement system which has been implanted in a subset of the animals corresponding to the control group, along one month. In all the animals, the myocardial infarction was induced by the ligation of the first circumflex marginal artery. In the animal group presented,the bioactive patch scaffold and the electrodes were implanted without the stem cells load. The scaffold is a piece of decellularized human pericardium, lyophilized and rehydrated with hydrogel RAD16-I. Nanogold particles were also placed near the electrodes to improve the electrode area conductivity. The results presented correspond to the subset of animals (n = 5), which had implanted the bioimpedance system monitoring the electrical impedance spectrum in vivo during 1 month. Two electrodes were connected to the bioactive patch implant. A total of 14 logarithmically spaced frequencies were measured every 5 minutes, from 100 Hz to 200 kHz. Results show a convergence of low-frequency and high frequency impedance magnitudes along the measurement period, which is coherent with the scar formation.

  • Interleaving and switching pattern modulation to conducted EMI reduction

     Mon Gonzalez, Juan; Gonzalez Diez, David; Gago Barrio, Javier; Balcells Sendra, Josep; Bogonez Franco, Francisco
    Colloque International et Exposition sur la Compatibilité Electromagnétique
    Presentation's date: 2012-06-26
    Presentation of work at congresses

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    Hard-less common mode active EMI filter  Open access

     Perez Robles, Daniel; Gonzalez Diez, David; Mon Gonzalez, Juan; Balcells Sendra, Josep; Gil Galí, Ignacio; Gago Barrio, Javier; Bogonez Franco, Francisco
    Colloque International et Exposition sur la Compatibilité Electromagnétique
    Presentation's date: 2012-06-26
    Presentation of work at congresses

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    Active EMI filters appear as an alternative to classical EMI filters based on passive components. Active EMI filters can provide more compact, cheaper and lighter solutions than passive approach. In this paper we present a theoretical analysis of the 4 possible configurations. Expressions of the transfer function and insertion losses considering impedances of mains and source of noise are presented. The voltage-current topology is identified as the more convenient solution. Finally, preliminary experimental results of a prototype capable to provide attenuation up to 100MHz are shown.

  • EMI reduction by means of switching frequency modulation with variable delay in power supplies

     Mon Gonzalez, Juan; Gago Barrio, Javier; Gonzalez Diez, David; Balcells Sendra, Josep; Fernández García, Raúl; Gil Galí, Ignacio; Bogonez Franco, Francisco
    International journal of electronics
    Vol. 99, num. 1, p. 103-112
    DOI: 10.1080/00207217.2011.610026
    Date of publication: 2012-01
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  • Immunity of power line communications (PLC) in disturbed networks

     Vallbe, Bernat; Balcells Sendra, Josep; Bogonez Franco, Francisco; Mata Diaz, Jorge; Gago Barrio, Javier
    IEEE International Symposium on Industrial Electronics
    p. 1621-1625
    DOI: 10.1109/ISIE.2011.5984403
    Presentation's date: 2011-06-28
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  • SVC model for voltage control of a microgrid

     Bogonez Franco, Francisco; Balcells Sendra, Josep; Junyent, Oriol; Jordà, Josep
    IEEE International Symposium on Industrial Electronics
    p. 1645-1649
    DOI: 10.1109/ISIE.2011.5984407
    Presentation's date: 2011-06-28
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    Low power renewable sources, connected to low voltage micro-grids, are becoming more and more common. Since there is a high degree of uncertainty on the availability of such sources, this causes problems of stability and makes difficult to guarantee the power quality (PQ) in all the points of the grid. Such kind of problems, are well known in medium voltage (MV) networks, where the proposed solutions to fix the stability and PQ problems are based on the control of reactive power flow in the grid. The equipment to perform such control function ranges from the simple capacitor banks driven by electro-mechanical contactors, through the Static Var Compensators (SVC) based on the combination of Thyristor Switched Capacitors (TSC) and Thyristor Controlled Reactors (TCR) or SVC combined with Active Power Filters (APF). This paper describes the design and implementation of a low power SVC prototype model, sizeable to higher power levels. It has been designed to compensate variations of the line voltage of a microgrid in a range of ±2%. The prototype can compensate 3kVAr capacitive and 1 kVAr inductive and is able to operate in a grid with a rated voltage of 400 V, phase to phase.

  • EMI Reduction in Parallel Multiconverter Topology Using Interleaving and Frequency Modulation Techniques

     Mon Gonzalez, Juan; Gago Barrio, Javier; Gonzalez Diez, David; Balcells Sendra, Josep; Fernández García, Raúl; Gil Galí, Ignacio; Bogonez Franco, Francisco
    Przeglad elektrotechniczny
    Vol. 10, p. 239-243
    Date of publication: 2010-10
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  • Performance of an implantable impedance spectroscopy monitor using ZigBee

     Bogonez Franco, Francisco; Bayés Genis, Antoni; Rosell Ferrer, Francisco Javier; Bragos Bardia, Ramon
    International Conference on Electrical Bio-impedance
    p. 1-4
    DOI: 10.1088/1742-6596/224/1/012163
    Presentation's date: 2010-04-04
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    This paper presents the characterization measurements of an implantable bioimpedance monitor with ZigBee. Such measurements are done over RC networks,performing short and long-term measurements, with and without mismatch in electrodes and varying the temperature and the RF range. The bioimpedance monitor will be used in organ monitoring through electrical impedance spectroscopy in the 100 Hz - 200 kHz range. The specific application is the study of the viability and evolution of engineered tissue in cardiac regeneration in an experimental protocol with pig models. The bioimpedance monitor includes a ZigBee transceiver to transmit the measured data outside the animal chest. The bioimpedance monitor is based in the 12 Bit Impedance Converter and Network Analyzer AD5933, improved with an analog front-end that implements a 4-electrode measurement structure and allows to measure small impedances. In the debugging prototype, the system autonomy exceeds 1 month when a 14 frequencies impedance spectrum is acquired every 5 minutes. The receiver side consists of a ZigBee transceiver connected to a PC to process the received data. In the current implementation, the effective range of the RF link was of a few centimeters, then needing a range extender placed close to the animal. We have increased it by using an antenna with higher gain. Basic errors in the phantom circuit parameters estimation after model fitting are below 1%.

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    Measurement errors in multifrequency bioelectrical impedance analyzers with and without impedance electrode mismatch  Open access

     Bogonez Franco, Francisco; Nescolarde Selva, Lexa Digna; Bragos Bardia, Ramon; Rosell Ferrer, Francisco Javier; Yandiola, Iñigo
    Physiological measurement
    Vol. 30, num. 7, p. 573-587
    DOI: 10.1088/0967-3334/30/7/004
    Date of publication: 2009-06-03
    Journal article

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    The purpose of this study is to compare measurement errors in two commercially available multi-frequency bioimpedance analyzers, a Xitron 4000B and an ImpediMed SFB7, including electrode impedance mismatch. The comparison was made using resistive electrical models and in ten human volunteers. We used three different electrical models simulating three different body segments: the right-side, leg and thorax. In the electrical models, we tested the effect of the capacitive coupling of the patient to ground and the skin–electrode impedance mismatch. Results showed that both sets of equipment are optimized for right-side measurements and for moderate skin–electrode impedance mismatch. In right-side measurements with mismatch electrode, 4000B is more accurate than SFB7. When an electrode impedance mismatch was simulated, errors increased in both bioimpedance analyzers and the effect of the mismatch in the voltage detection leads was greater than that in current injection leads. For segments with lower impedance as the leg and thorax, SFB7 ismore accurate than 4000B and also shows less dependence on electrode mismatch. In both devices, impedance measurements were not significantly affected (p > 0.05) by the capacitive coupling to ground.

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    Modulation technique to reduce EMI in power multiconverters  Open access

     Mon Gonzalez, Juan; Gago Barrio, Javier; Gonzalez Diez, David; Balcells Sendra, Josep; Fernández García, Raúl; Bogonez Franco, Francisco; Gil Galí, Ignacio
    IEICE electronics express
    Vol. 6, num. 8, p. 511-515
    DOI: 10.1587/elex.6.511
    Date of publication: 2009-04-05
    Journal article

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    A new technique to reduce EMI in modular power multiconverters is described. The technique is based on a combination of switching frequency modulation and a variable delay between communication signals of the single converters. The proposed technique has been validated experimentally in a four converters parallel topology. A significant EMI reduction has been obtained with regard to conventional techniques.

  • DESARROLLO DE TECNICAS DE MONITORIZACIÓN NO DESTRUCTIVA Y MINIMAMENTE INVASIVA EN APLICACIONES DE INGENIERIA CELULAR....

     Nescolarde Selva, Lexa Digna; Rosell Ferrer, Francisco Javier; Sánchez Terrones, Benjamin; Bogonez Franco, Francisco; Bragos Bardia, Ramon
    Competitive project

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    Implantable bioimpedance monitor using ZigBee  Open access

     Bogonez Franco, Francisco; Bragos Bardia, Ramon; Bayés Genis, Antoni; Rosell Ferrer, Francisco Javier
    IEEE Engineering in Medicine and Biology Society
    p. 4868-4871
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    In this paper, a novel implantable bioimpedance monitor using a free ZigBee protocol for the transmission of the measured data is described. The application field is the tissue and organ monitoring through electrical impedance spectroscopy in the 100 Hz – 200 kHz range. The specific application is the study of the viability and evolution of engineered tissue in cardiac regeneration. Additionally to the telemetric feature, the measured data are stored in a memory for backup purposes and can be downloaded at any time after an RF link break. In the debugging prototype, the system autonomy exceeds 1 month when a 14 frequencies impedance spectrum is acquired every 5 minutes. In the current implementation, the effective range of the RF link is reduced and needs for a range extender placed near the animal. Current work deals with improving this range.

  • Análisis y Técnicas de Reducción de EMI En Convertidores Matriciales y Sistemas Multiconvertidor: Interacción con los Sistemas de Comunicaciones por Línea (PLC) (TEC2007-615827/MIC)

     Balcells Sendra, Josep; Arias Pujol, Antoni; Gago Barrio, Javier; Gonzalez Diez, David; Lamich Arocas, Manuel; Mon Gonzalez, Juan; Ortega Garcia, Carlos; Gil Galí, Ignacio; Espina Masramon, Jorge; Bogonez Franco, Francisco
    Competitive project

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  • CRISALIDA (Convergencia de Redes Inteligentes y Seguras en Aplicaciones Eléctricas Innovando en Diseño Ambiental)

     Balcells Sendra, Josep; Gago Barrio, Javier; Gonzalez Diez, David; Lamich Arocas, Manuel; Bogonez Franco, Francisco; Mata Diaz, Jorge; Muñoz Tapia, Jose Luis; Alins Delgado, Juan Jose; Esparza Martin, Oscar
    Competitive project

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  • Implantable bioimpedance system for measuring the impedance of kidney

     Bogonez Franco, Francisco; Riu Costa, Pere Joan
    International Conference on Electrical Bio-impedance
    p. 256-259
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  • Changes in the Arn Bioimpedance with Applied Pressure and Force

     Giovinazzo, Giuseppe; Al-Surakhi, O I; Bogonez Franco, Francisco; Riu Costa, Pere Joan
    International Conference on Electrical Bio-impedance
    p. 719-722
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  • Whole-body and Thoracic Bioimpedance Measurement: Hypertension and hyperhydratation in Hemodialyisis patients

     Nescolarde Selva, Lexa Digna; Bogonez Franco, Francisco; Calpe, J; Hernández, R; Doñate, T; Rosell Ferrer, Francisco Javier
    IEEE Engineering in Medicine and Biology Society
    p. 3593-3596
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  • Portable wireless bioimpedance measurement system for hd monitoring

     Bogonez Franco, Francisco; Sevilla, Javier; Surakhy, Omar; Riu Costa, Pere Joan
    World Congress on Medical Physics and Biomedical Engineering 2006 and 7th Conference on Biomedical Applications of Electrical Impedance Tomography
    p. 4235
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  • In vivo assessment of haematocrit changes by electrical impedance measurements

     Bogonez Franco, Francisco; Riu Costa, Pere Joan
    EMBEC'05 - 3rd European Medical and Biological Engineering Conference
    p. 1-6
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  • Utilidad de las medidas segmentales-monofrecuencia en pacientes en diálisis peritoneal

     Nescolarde Selva, Lexa Digna; Bogonez Franco, Francisco; Riu, P; Bragos Bardia, Ramon; Doñate, T
    V Reunión Nacional de Diálisis Peritoneal
    p. 1
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  • Lung edema detection by segmental single-frequency bioimpedance measurements

     Nescolarde Selva, Lexa Digna; Bogonez Franco, Francisco; Riu, P; Bragos Bardia, Ramon; Rosell, J; Doñate, T
    25th Annual Dialysis Conference
    p. 1
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  • Impedance spectroscopy differential-difference circuit for biomass measurement

     Bogonez Franco, Francisco; Rosell Ferrer, Francisco Javier; Bragos Bardia, Ramon
    International Conference on Electrical Bio-impedance
    p. 461-464
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  • Medidas segmentales-monofrecuencia en pacientes sujetos a diálisis peritoneal: Análisis del vector impedancia

     Nescolarde Selva, Lexa Digna; Bogonez Franco, Francisco; Doñate, T; Riu Costa, Pere Joan; Bragos Bardia, Ramon; Rosell Ferrer, Francisco Javier
    Congreso Anual de la Sociedad Española de Ingeniería Biomédica
    p. 353-356
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  • Analisis comparativo de la emi generada por un boost en dinamicas periodicas y caótica de bajo rizado

     Toribio Millan, Eliezer; Bogonez Franco, Francisco; Moreno Font, Vanessa
    Seminario Anual de Automática, Electrónica Industrial e Instrumentación
    p. 110-111
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  • Bioelectrical impedance vector analysis in copd patients

     Bogonez Franco, Francisco; Rabinovich, R; Nescolarde Selva, Lexa Digna; Roca, J; Rosell Ferrer, Francisco Javier; Riu Costa, Pere Joan; Piccoli, P Riu I A
    IEEE Engineering in Medicine and Biology Society
    p. 3087-3089
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  • Impedance vector analysis in COPD patients

     Rabinovich, R; Bogonez Franco, Francisco; Nescolarde Selva, Lexa Digna
    IEEE Engineering in Medicine and Biology Society
    p. 1-5
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