Ara es mostren els items 1-20 de 62

  • 3Cat-1: a multi-payload Cubesat-based scientific and technology demonstrator 

    Jové Casulleras, Roger; Camps Carmona, Adriano José; Ramos Castro, Juan José; Alarcón Cot, Eduardo José; Bou Balust, Elisenda; Carreño Luengo, Hugo; Amézaga Sarries, Adrià; Olivé Muñiz, Roger; Vidal Mateu, David; Muñoz Martin, Joan Francesc; Araguz López, Carles; Marí Barceló, Marc; Ortega Villasclaras, Pablo Rafael; Pons Nin, Joan; Gorreta Mariné, Sergio; Domínguez Pumar, Manuel; Iannazzo Soteras, Mario Enrique (European Spatial Agengy (ESA), 2014)
    Comunicació de congrés
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  • 3Cat-1 project: a multi-payload CubeSat for scientific experiments and technology demonstrators 

    Jové Casulleras, Roger; Araguz López, Carles; Via Ortega, Pol; Solanellas Bofarull, Arnau; Amézaga Sarries, Adrià; Vidal Mateu, David; Muñoz Martin, Joan Francesc; Marí Barceló, Marc; Olivé Muñiz, Roger; Sáez Hernández, Alberto; Jané Abad, Jaume; Bou Balust, Elisenda; Iannazzo Soteras, Mario Enrique; Gorreta Mariné, Sergio; Ortega Villasclaras, Pablo Rafael; Pons Nin, Joan; Domínguez Pumar, Manuel; Alarcón Cot, Eduardo José; Ramos Castro, Juan José; Camps Carmona, Adriano José (2017)
    Article
    Accés obert
    This article introduces 3 Cat-1, the first project of the Technical University of Catalonia to build and launch a nano-satellite. Its main scope is to develop, construct, assemble, test and launch into a low Earth orbit a ...
  • Accuracy of heart rate variability estimation by photoplethysmography using an smartphone : processing optimization and fiducial point selection 

    Ferrer Mileo, Víctor; Guede Fernández, Federico; Fernández Chimeno, Mireya; Ramos Castro, Juan José; García González, Miguel Ángel (Institute of Electrical and Electronics Engineers (IEEE), 2015)
    Text en actes de congrés
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    This work compares several fiducial points to detect the arrival of a new pulse in a photoplethysmographic signal using the built-in camera of smartphones or a photoplethysmograph. Also, an optimization process for ...
  • A comparison of heartbeat detectors for the seismocardiogram 

    García González, Miguel Ángel; Argelagós Palou, Ariadna; Fernández Chimeno, Mireya; Ramos Castro, Juan José (Institute of Electrical and Electronics Engineers (IEEE), 2013)
    Comunicació de congrés
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    The study aimed to study the accuracy in RR time series derived from the seismocardiogram when employing different heartbeat detectors in subjects measured in a quiet environment. The ECG and seismocardiogram of 17 healthy ...
  • A methodology to quantify the differences between alternative methods of heart rate variability measurement 

    García González, Miguel Ángel; Fernández Chimeno, Mireya; Guede Fernández, Federico; Ferrer Mileo, Víctor; Argelagós Palou, Ariadna; Álvarez Gómez, Laura; Parrado Romero, Eva; Moreno Sánchez, Jordi; Capdevila, Lluis; Ramos Castro, Juan José (Institute of Physics (IOP), 2015-12-14)
    Article
    Accés obert
    This work proposes a systematic procedure to report the differences between heart rate variability time series obtained from alternative measurements reporting the spread and mean of the differences as well as the agreement ...
  • Análisis de la variabilidad de la frecuencia cardíaca mediante fotopletismografía por imagen 

    Melchor Rodríguez, Angel; Ramos Castro, Juan José (2014)
    Comunicació de congrés
    Accés obert
    La Variabilidad de la Frecuencia Cardíaca (VFC) es un parámetro fisiológico que en las últimas décadas ha tomado mayor importancia por su implicación con el sistema nervioso autónomo y su relación con los trastornos ...
  • An application of fractional differintegration to heart rate variability time series 

    García González, Miguel Ángel; Fernández Chimeno, Mireya; Ramos Castro, Juan José; Capdevila, Lluis; Parrado, Eva (2013-07)
    Article
    Accés restringit per política de l'editorial
    Fractional differintegration is used as a new tool to characterize heart rate variability time series. This paper proposes and focuses in two indexes (ac and fnQ) derived from the fractional differintegration operator. ...
  • A new and fast index for the quantification of short range self-similarity in RR time series 

    García González, Miguel Ángel; Fernández Chimeno, Mireya; Ramos Castro, Juan José (2010)
    Comunicació de congrés
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    We propose a new and very fast index (the frequency of sign changes of the mirrored differences or fscmd) with good correlation with the short range scaling exponent (  R) estimated among scales 4 to 16 of the DFA. ...
  • A novel index based on fractional calculus to assess the dynamics of heart rate variability: changes due to chi or yoga meditations 

    García González, Miguel Ángel; Ramos Castro, Juan José; Fernández Chimeno, Mireya (Computing in Cardiology, 2012)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    The study aims to present and interpret a novel index based on fractional calculus ( αc) and to assess differences in RR time series dynamics in subjects during meditation. Fractional differintegration (FDI) of a RR time ...
  • Assessment of energy expended in physical activity by a smartphone-based system 

    Guede Fernández, Federico; Carbones Fargas, Bernat; Capdevila Ortis, Lluís; García González, Miguel Ángel; Ramos Castro, Juan José; Fernández Chimeno, Mireya (Springer, 2014)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The aim of this paper is to present a smartphone based system to assess daily energy expended in physical activ- ity (PA). Nowadays, sedentary li festyle is increasingly recog- nized as a serious, worldwide public ...
  • Automatic detection of ECG ventricular activity waves using continuous spline wavelet transform 

    Alvarado Serrano, Carlos; Arregui, J.; Ramos Castro, Juan José; Pallàs Areny, Ramon (2005)
    Text en actes de congrés
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    In this study, we present detection algorithms of characteristic points of the QRS and T waves based on the continuous wavelet transform (CWT) with splines. This technique can handle any integer scale and the analysis is ...
  • A wireless sensor network design for the Help4Mood european project 

    Pérez Díaz de Cerio, David; Ruiz Boqué, Sílvia; Rosell Ferrer, Francisco Javier; Ramos Castro, Juan José; Castro Robles, Joan Carles (VDE Conference Publications, 2012)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    Help4Mood is a closed loop approach supporting the control, communication and treatment management of patients with Major Depression. The first out of the three main components of the Help4Mood solution is the Personal ...
  • A wireless under-mattress sensor system for sleep monitoring in people with major depression 

    Mahdavi, Hadiseh; Ramos Castro, Juan José; Giovinazzo, Giuseppe; García González, Miguel Ángel; Rosell Ferrer, Francisco Javier (2012)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    Monitoring people during sleep time is of particular interest to patients with sleep disorders and elderly people or infants. We have developed a battery powered electronic system to monitor people in the bed, store the ...
  • Capacitive sensing of test mass motion with nanometer precision over millimeter-wide sensing gaps for space-borne gravitational reference sensors 

    Audley, H.; Auger, G.; Baird, J.; Binetruy, P.; Caleno, M.; Cesarini, A.; Diepholz, I; Dixon, G; Dolesi, R; Ferraioli, L.; Heinzel, G; Hollington, D.; Karnesis, N.; Martín-Porqueras, F.; Fernandez Sopuerta, Carlos; Texier, D.; Vitale, S.; Wanner, G; Ward, Harold; Ramos Castro, Juan José (2017-09-26)
    Article
    Accés obert
    We report on the performance of the capacitive gap-sensing system of the Gravitational Reference Sensor on board the LISA Pathfinder spacecraft. From in-flight measurements, the system has demonstrated a performance, down ...
  • Challenge based education: an approach to innovation through multidisciplinary teams of students using Design Thinking 

    Charosky, Guido; Leveratto, Luciana; Hassi, Lotta; Papageorgiou, K.; Ramos Castro, Juan José; Bragós Bardia, Ramon (Institute of Electrical and Electronics Engineers (IEEE), 2018)
    Text en actes de congrés
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    This work aims to describe and discuss the benefits and learning outcomes detected along four iterations of a learning experience carried out by three institutions: ESADE Business School, IED Istituto Europeo di Design and ...
  • Changes in heart rate variability (HRV) in field hockey players during the 2006 World Cup 

    Rodas Font, Gil; Yanguas Leyes, Javier; Pedret, Carles; Ramos Castro, Juan José; Capdevila, L. (2011-07)
    Article
    Accés obert
    The aim of this study is to determine the changes in heart rate variability (HRV) in field hockey players during the course of a world championship. The Spanish national team took part in the study by making daily records ...
  • Changes in heart rate variability indexes due to drowsiness in professional drivers measured in a real environment 

    García González, Miguel Ángel; Fernández Chimeno, Mireya; Ramos Castro, Juan José (Computing in Cardiology, 2012)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    The study aims to assess the changes in Heart Rate Variability (HRV) indexes in healthy subjects whi le driving in a real environment in order to detect drowsiness. The ECG of ten professional drivers was acquired ...
  • Characteristics and energy dependence of recurrent galactic cosmic-ray flux depressions and of a forbush decrease with LISA Pathfinder 

    Armano, M.; Audley, H.; Baird, J.; Bassan, M.; Benella, S.; Lobo, J.A.; Ramos Castro, Juan José (2018-02-16)
    Article
    Accés obert
    Galactic cosmic-ray (GCR) energy spectra observed in the inner heliosphere are modulated by the solar activity, the solar polarity and structures of solar and interplanetary origin. A high counting rate particle detector ...
  • Charge-induced force noise on free-falling test masses: results from LISA pathfinder 

    Armano, M.; Audley, H.; Auger, G.; Baird, J.; Binetruy, P.; Ramos Castro, Juan José (2017-04-26)
    Article
    Accés obert
    We report on electrostatic measurements made on board the European Space Agency mission LISA Pathfinder. Detailed measurements of the charge-induced electrostatic forces exerted on free-falling test masses (TMs) inside the ...
  • Comparison of omega wave system and polar S810i to detect R-R intervals at rest 

    Parrado Romero, Eva; García González, Miguel Ángel; Ramos Castro, Juan José; Cervantes Blasquez, Julio Cesar; Rodas Font, Gil; Capdevila Ortis, Lluís (2010)
    Article
    Accés restringit per política de l'editorial
    The present study was performed to compare R-R interval data and heart rate variability indices obtained from the Polar S810i and the Omega Wave Sport System for a total of 96 adults in a supine position. Data were ...