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Ara es mostren els items 12-31 de 66

    • Assessment of the depth of anesthesia based on symbolic dynamics of the EEG 

      Tupaika, Nadine; Vallverdú Ferrer, Montserrat; Jospin, Mathieu; Jensen, Erik Weber; Struys, Michel M. R. F.; Vereecke, Hugo E. M.; Voss, Andreas; Caminal Magrans, Pere (2010)
      Comunicació de congrés
      Accés obert
      Methodologies based on symbolic dynamics have successfully demonstrated to reflect the nonlinear behavior of biological signals. In the present study, symbolic dynamics was applied to the electroencephalogram (EEG) in ...

    • Auditory and nociceptive stimuli responses in the electro–encephalogram : a non-linear measures and time-frequency representation based analysis 

      Melia, Umberto Sergio Pio; Vallverdú Ferrer, Montserrat; Clarià Sancho, Francesc; Valls-Solé, Josep; Caminal Magrans, Pere (2014)
      Article
      Accés restringit per política de l'editorial
      Introduction: This article is part of the Focus Theme of Methods of Information in Medicine on “Biosignal Interpretation: Advanced Methods for Neural Signals and Images“. Objectives: An efficient way to investigate the ...

    • Caracterización del electroencefalograma mediante etropía multiescala para la detección de la somnolencia 

      Borras, Marta; Cambrodi, Roser; Clarià Sancho, Francesc; Sampol, Gabriel; Vallverdú Ferrer, Montserrat (2018)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      La somnolencia diurna excesiva es un o de los síntomas provenientes de varios trastornos relacionados con el sueño. Diferentes investigaciones afirman que hay más personas afectadas de somnolencia diurna que las diagnosticadas ...

    • Caracterización y análisis de las interacciones de regulación entre los factores de transcripción y los genes 

      Maynou Fernández, Joan; Pairó Castiñeira, Erola; Massanet Vila, Raimon; Vallverdú Ferrer, Montserrat; Caminal Magrans, Pere; Perera Lluna, Alexandre (2011)
      Text en actes de congrés
      Accés obert
      El estudio y la comprensión de las redes de interacción entre proteínas es fundamental para entender el funcionamiento de los diferentes procesos biológicos a nivel celular. El conjunto de interacciones entre proteínas, ...

    • Characterization of daytime sleepiness by time-frequency measures of EEG signals 

      Guaita, Marc; Melia, Umberto Sergio Pio; Vallverdú Ferrer, Montserrat; Caminal Magrans, Pere; Vilaseca, Isabel; Monserrat, Josep; Gaig, Carlos; Clarià Sancho, Francesc; Salamero, Manuel; Santamaria, Joan (2015-06-01)
      Article
      Accés obert
      Excessive daytime sleepiness (EDS) is one of the main symptoms of several sleep-related disorders with a great impact on patient lives. While many studies have been carried out in order to assess daytime sleepiness, automatic ...

    • Clinical decision support system to enhance quality control of forced spirometry using information and communication technologies 

      Burgos Rincón, Felip; Melia, Umberto Sergio Pio; Vallverdú Ferrer, Montserrat; Velickovski, Filip; Lluch-Ariet, Magí; Caminal Magrans, Pere; Roca-Torrent, Josep (2014-10-21)
      Article
      Accés restringit per política de l'editorial
      Background: We recently demonstrated that quality of spirometry in primary care could markedly improve with remote offline support from specialized professionals. It is hypothesized that implementation of automatic online ...

    • Comparison of the qCON and qNOX indices for the assessment of unconsciousness level and noxious stimulation response during surgery 

      Melia, Umberto Sergio Pio; Gabarrón, Eva; Agustí, Mercé; Souto, Nuria; Pineda, Patricia; Fontanet, Joan; Vallverdú Ferrer, Montserrat; Jensen, Erik Weber; Gambus, Pedro L. (2016-10-20)
      Article
      Accés obert
      The objective of this work is to compare the performances of two electroencephalogram based indices for detecting loss of consciousness and loss of response to nociceptive stimulation. Specifically, their behaviour after ...

    • Comparison of two cardiac output monitors, qCO and LiDCO, during general anesthesia 

      Escrivá, Jesús; Gabarrón, Eva; Fort, Pol; Pan, Y.; Shengjin, Ge; Liao, Q; Vallverdú Ferrer, Montserrat (2016-08-09)
      Article
      Accés obert
      Background: Optimization of cardiac output (CO) has been evidenced to reduce postoperative complications and to expedite the recovery. Likewise, CO and other dynamic cardiac parameters can describe the systemic blood flow ...

    • Correntropy measures to detect daytime sleepiness from EEG signals 

      Melia, Umberto Sergio Pio; Guaita, Marc; Vallverdú Ferrer, Montserrat; Montserrat, Josep Maria; Vilaseca, Isabel; Salamero, Manuel; Gaig, Carles; Caminal Magrans, Pere; Santamaria, Joan (Institute of Physics (IOP), 2014-10-01)
      Article
      Accés obert
      Excessive daytime sleepiness (EDS) is one of the main symptoms of several sleep related disorders and has a great impact on patients' lives. While many studies have been carried out in order to assess daytime sleepiness, ...

    • Detection of transcription factor binding sites using Rényi entropy 

      Maynou Fernández, Joan; Vallverdú Ferrer, Montserrat; Clarià, Francesc; Perera Lluna, Alexandre; Caminal Magrans, Pere (IEEE Press. Institute of Electrical and Electronics Engineers, 2008)
      Text en actes de congrés
      Accés obert
      During the process of protein synthesis, transcription of DNA to messenger RNA starts with the binding of the transcription factors to the promoter. One of the issues on the prediction of transcription factor binding is ...

    • Detrended fluctuation analysis of heart rate by means of symbolic series 

      Valencia Murillo, José Fernando; Vallverdú Ferrer, Montserrat; Schroeder, Rico; Voss, Andreas; Cygankiewicz, I.; Vazquez, R.; Bayes de Luna, Antonio; Caminal Magrans, Pere (2010)
      Text en actes de congrés
      Accés obert
      Detrended fluctuation analysis (DFA) has been shown to be a useful tool for diagnosis of patients with cardiac diseases. The scaling exponents obtained with DFA are an indicator of power-law correlations in signal ...

    • Dimensionality reduction oriented toward the feature visualization for ischemia detection 

      Delgado-Tejos, Edilson; Perera Lluna, Alexandre; Vallverdú Ferrer, Montserrat; Caminal Magrans, Pere; Castellanos Dominguez, German (2009-03-16)
      Article
      Accés obert
      An effective data representation methodology on high-dimension feature spaces is presented, which allows a better interpretation of subjacent physiological phenomena (namely, cardiac behavior related to cardiovascular ...

    • Entropy measures as descriptors to identify apneas in rheoencephalographic signals 

      González Pijuán, Carmen; Jensen, Erik Weber; Gambus, Pedro L.; Vallverdú Ferrer, Montserrat (2019-06-18)
      Article
      Accés obert
      Rheoencephalography (REG) is a simple and inexpensive technique that intends to monitor cerebral blood flow (CBF), but its ability to reflect CBF changes has not been extensively proved. Based on the hypothesis that ...

    • Evaluación de Modelos Ocultos de Markov y Dinámica Simbólica de la HRV:Pacientes con Cardiomiopatia Isquemica 

      Palacios Muñoz, Manuel; Vallverdú Ferrer, Montserrat (2011-03-02)
      Report de recerca
      Accés restringit per acord de confidencialitat
      En este trabajo se presenta la descripción de la técnica no lineal de la dinámica simbólica, que transforma una serie de tiempo en un conjunto de observaciones, y se desarrolla una nueva metodología de análisis de la ...

    • Evaluation of acceleration and deceleration cardiac processes using phase-rectified signal averaging in healthy and idiopathic dilated cardiomyopathy subjects 

      Bas, Rosana; Vallverdú Ferrer, Montserrat; Valencia, Jose F.; Voss, Andreas; Bayes de Luna, Antonio; Caminal Magrans, Pere (2015-02-01)
      Article
      Accés obert
      The aim of the present study was to investigate the suitability of the Phase-Rectified Signal Averaging (PRSA) method for improved risk prediction in cardiac patients. Moreover, this technique, which separately evaluates ...

    • Exons and introns characterization in nucleic acid sequences by time-frequency analysis 

      Melia, Umberto Sergio Pio; Clarià Sancho, Francesc; Gallardo Chacón, Joan Josep; Caminal Magrans, Pere; Perera Lluna, Alexandre; Vallverdú Ferrer, Montserrat (2010)
      Comunicació de congrés
      Accés obert
      A current problem in deoxyribonucleic acid (DNA) sequence analysis is to determine the exact locations of the genes and also in eukaryotes, the protein-coding regions in the mRNA primary transcript (pre-mRNA).The conversion ...

    • Extraction of the respiration signal from the electrocardiogram 

      Valderas Yamuza, Maria Teresa; Vallverdú Ferrer, Montserrat; Caminal Magrans, Pere; Schröder, Rico; Voss, Andreas (2015)
      Text en actes de congrés
      Accés obert

    • Filtering and thresholding the analytic signal envelope in order to improve peak and spike noise reduction in EEG signals 

      Melia, Umberto Sergio Pio; Clarià Sancho, Francesc; Vallverdú Ferrer, Montserrat; Caminal Magrans, Pere (2014-04-01)
      Article
      Accés obert
      To remove peak and spike artifacts in biological time series has represented a hard challenge in the last decades. Several methods have been implemented mainly based on adaptive filtering in order to solve this problem. ...

    • Generación de bioseñales sintéticas mediante series de Fourier variantes en tiempo 

      Escrivá, Jesús; Galea Cazorla, A.; González Pijuán, Carmen; Vallverdú Ferrer, Montserrat; Caminal Magrans, Pere; Jensen, Erik Weber (Comité Español de Automática (CEA-IFAC), 2016)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      La selección de la técnica más adecuada para el análisis de una señal tiempo-frecuencia depende en gran medida de la propia naturaleza de la señal objeto de análisis. Para ello, resulta adecuado utilizar señales sintéticas ...

    • Heart rate variability characterized by refined multiscale entropy applied to cardiac death in ischemic cardiomyopathy patients 

      Caminal Magrans, Pere; Valencia Murillo, José Fernando; Vallverdú Ferrer, Montserrat; Schroeder, Rico; Cygankiewicz, I.; Vázquez, Rafael; Bayes de Luna, Antonio; Porta, Alberto; Voss, Andreas (2010)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      In this work, Refined Multiscale Entropy (RMSE) was applied to characterize risk of cardiac death in ischemic cardiomyopathy patients, analyzing heart rate variability (HRV) by means of RR series during daytime and ...