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Ara es mostren els items 71-90 de 99

    • Precision charge control for isolated free-falling test masses: LISA pathfinder results 

      Armano, M.; Audley, H.; Baird, J.; Ramos Castro, Juan José (American Physical Society (APS), 2018-09-11)
      Article
      Accés obert
      The LISA Pathfinder charge management device was responsible for neutralizing the cosmic-ray-induced electric charge that inevitably accumulated on the free-falling test masses at the heart of the experiment. We present ...

    • Prototipo de pulsera para la medida de ECG bajo demanda y la medida continua de la onda de pulso 

      Ferrer Mileo, Víctor; Barea Cañizares, Alberto; Mateu Mateus, Marc; Guede Fernández, Federico; Fernández Chimeno, Mireya; Ramos Castro, Juan José; García González, Miguel Ángel (Universitat Politècnica de València, 2016)
      Comunicació de congrés
      Accés obert
      El interés en la variabilidad de ritmo cardiaco (HRV) y la estimación de la presión arterial a partir del tiempo de llegada de la onda de pulso (PAT) se ha incrementado exponencialmente en los últimos años debido a los ...

    • Prototyping the future of learning: reflections after seven iterations of Challenge-Based Innovation (2014-2020) 

      Papageorgiou, K.; Hassi, Lotta; Bragós Bardia, Ramon; Charosky Larrieu-Let, Guido; Leveratto, Luciana; Ramos Castro, Juan José (European Organization for Nuclear Research (CERN), 2021-06-30)
      Article
      Accés obert
      This article presents the reflections of a multidisciplinary team working on CERN’s Challenge-Based Innovation (CBI) since 2014. These reflections on pedagogy and innovation are positioned at the intersection of experiential ...

    • Real time heart rate variability assessment from android smartphone camera photoplethysmography: postural and device influences 

      Guede Fernández, Federico; Ferrer Mileo, Víctor; Ramos Castro, Juan José; Fernández Chimeno, Mireya; García González, Miguel Ángel (Institute of Electrical and Electronics Engineers (IEEE), 2015)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The aim of this paper is to present a smartphone based system for real-time pulse-to-pulse (PP) interval time series acquisition by frame-to-frame camera image processing. The developed smartphone application acquires ...

    • Reduced heart rate variability predicts fatigue severity in individuals with chronic fatigue syndrome/myalgic encephalomyelitis 

      Escorihuela, Rosa María; Capdevila, Lluis; Ramos Castro, Juan José; Zaragozà, María Cleofé (2020-01-06)
      Article
      Accés obert
      Heart rate variability (HRV) is an objective, non-invasive tool to assessing autonomic dysfunction in chronic fatigue syndrome/myalgic encephalomyelitis (CFS/ME). People with CFS/ME tend to have lower HRV; however, in the ...

    • Resistive-based micro-kelvin temperature resolution for ultra-stable space experiments 

      Roma Dollase, David; Gualani, Vivek; Gohlke, Martin; Abich, Klaus; Morales Krueger, Jordan; Gonzalvez Rubio, Alba; Martín Hernández, Víctor; Ramos Castro, Juan José; Sanjuán Muñoz, Josep; Nofrarias Serra, Miquel (2022-12-23)
      Article
      Accés obert
      High precision temperature measurements are a transversal need in a wide area of physical experiments. Space-borne gravitational wave detectors are a particularly challenging case, requiring both high precision and high ...

    • Resonance frequency is not always stable over time and could be related to the inter-beat interval 

      Capdevila Ortis, Lluís; Parrado Romero, Eva; Ramos Castro, Juan José; Zapata Lamana, Rafael; Lalanza, Jaume F. (Nature, 2021-04-16)
      Article
      Accés obert
      Heart Rate Variability Biofeedback (HRVB) is based on breathing at an optimal rate (or resonance frequency, RF) corresponding to the respiratory sinus arrhythmia (RSA). Our aim is to check whether the RF is a stable factor ...

    • RITA: a 1U multi-sensor Earth observation payload for the AlainSat-1 

      Pérez Portero, Adrián; Fernandez Capon, Lara Pilar; Badia Ballús, Marc; Fabregat, P.; Rayon, L.; Gonga Siles, Amadeu; Crisan, Ieremia; Garcia, A.; Munuera Vilalta, Mar; Contreras, L.; Ramos Castro, Juan José; Jallad, A.H.; Camps Carmona, Adriano José (Universitat Politècnica de Catalunya, 2022-04-29)
      Comunicació de congrés
      Accés obert
      The Remote sensing and Interference detector with radiomeTry and vegetation Analysis (RITA) is one of the Remote Sensing payloads selected as winners of the 2nd GRSS Student Grand Challenge in 2019, to fly on board of the ...

    • SeniorFit : Una aplicación móvil para el seguimiento de la adherencia a estilos de vida saludable para gente mayor 

      Guede Fernández, Federico; Ferrer Mileo, Víctor; Fernández Chimeno, Mireya; Ramos Castro, Juan José; García González, Miguel Ángel (Universitat Politècnica de València, 2016)
      Comunicació de congrés
      Accés obert
      El envejecimiento progresivo de la población en los países desarrollados exige la promoción de estilos de vida saludables para fomentar el envejecimiento activo. En este trabajo se presenta una aplicación denominada ...

    • Sensor noise in LISA Pathfinder: in-flight performance of the optical test mass readout 

      Armano, M.; Audley, H.; Baird, J.; Binetruy, P.; Born, M.; Bortoluzzi, D.; Brandt, N.; Castelli, Marta; Cavalleri, A.; Cesarini, A.; Cruise, M.; Danzmann, K.; Silva, M. de Deus; Ramos Castro, Juan José (American Institute of Physics (AIP), 2021-04-02)
      Article
      Accés obert
      We report on the first subpicometer interferometer flown in space. It was part of ESA’s Laser Interferometer Space Antenna (LISA) Pathfinder mission and performed the fundamental measurement of the positional and angular ...

    • Sensor noise in LISA Pathfinder: laser frequency noise and its coupling to the optical test mass readout 

      Armano, M.; Audley, H.; Baird, J.; Binetruy, P.; Wollborn, Michael; Bortoluzzi, D.; Brandt, N.; Castelli, Eleonora; Cavalleri, A.; Cesarini, A.; Cruise, M.; Danzmann, K.; de Deus Silva, Marcus; Ramos Castro, Juan José (American Physical Society, 2024-02-15)
      Article
      Accés obert
      The LISA Pathfinder (LPF) mission successfully demonstrated the feasibility of the technology needed for the future space borne gravitational wave observatory LISA. A key subsystem under study was the laser interferometer, ...

    • 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 ...

    • Spacecraft and interplanetary contributions to the magnetic environment on-board LISA pathfinder 

      Armano, M.; Audley, H.; Baird, J.; Binetruy, P.; Born, M.; Bortoluzzi, D.; Cavalleri, A.; Cesarini, A.; Cruise, M.; Danzmann, K.; Ramos Castro, Juan José (Oxford University Press, 2020-05-01)
      Article
      Accés obert
      LISA Pathfinder (LPF) has been a space-based mission designed to test new technologies that will be required for a gravitational wave observatory in space. Magnetically driven forces play a key role in the instrument ...

    • Spatial variability of ventricular activity intervals in normal subjects and old myocardial infarction patients 

      Alvarado Serrano, Carlos; Ramos Castro, Juan José; Pallàs-Areny, Ramon (Institute of Electrical and Electronics Engineers, 2004-06)
      Text en actes de congrés
      Accés obert
      Increased dispersion of QT interval in the 12-lead ECG have been proposed as risk factor of ventricular arrhythmias in post myocardial infarction (post-MI) patients, but its sensitivity and specifity is low for diagnosis ...

    • Spherical probe for the thermophysical characterization of regoliths for planetary exploration using frequency methods 

      Domínguez Pumar, Manuel; Rosero Pozo, Carlos Alberto; Pons Nin, Joan; Ramos Castro, Juan José; Szewczyk, Daria; Jezowski, Andrzej; Solà Peñafiel, Nil; Manyosa i Vilardell, Xavier; Bermejo Broto, Sandra; Jiménez Serres, Vicente (2022-12-01)
      Article
      Accés obert
      The objective of this paper is to analyse the capability of a spherical thermoprobe, recently proposed as a 3D heat flux sensor for regoliths, and additionally to characterize the thermophysical properties of regoliths. ...

    • Sub-Femto-g free fall for space-based gravitational wave observatories : LISA Pathfinder results 

      Armano, M.; Audley, H.; Auger, G.; Nofrarias Serra, Miquel; Sanjuán Muñoz, Josep; Ramos Castro, Juan José (2016-06-07)
      Article
      Accés obert
      We report the first results of the LISA Pathfinder in-flight experiment. The results demonstrate that two free-falling reference test masses, such as those needed for a space-based gravitational wave observatory like LISA, ...

    • Synchrosqueezing index for detecting drowsiness based on the respiratory effort signal 

      Rodríguez-Ibáñez, N.; García González, Miguel Ángel; Fernández Chimeno, Mireya; De Rosario, H.; Ramos Castro, Juan José (2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Objective: The aim of this work is to evaluate a new index to assess the alertness state of drivers based on the respiratory dynamics derived from an inductive band using the variability of the respiratory rhythms assessed ...

    • Temperature gradient sensor from pulsed power supply duty cycle in ultra-low-power energy harvesting system 

      Jové Casulleras, Roger; Ramos Castro, Juan José; Corimanya, H; Camps Carmona, Adriano José; Alarcón Cot, Eduardo José; Amézaga Sarries, Adrià; Bou Balust, Elisenda (Institution of Electrical Engineers, 2014-05-22)
      Article
      Accés restringit per política de l'editorial
      Directly interfacing sensors that link sensors to micro-controllers without a signal conditioning circuit or an analogue-to-digital converter on the one side and energy harvesting systems on the other side are two key ...

    • Temperature stability in the sub-milliHertz band with LISA Pathfinder 

      Armano, M.; Audley, H.; Baird, J.; Binetruy, P.; Born, M.; Bortoluzzi, D.; Ramos Castro, Juan José (Oxford University Press, 2019-07-01)
      Article
      Accés obert
      LISA Pathfinder (LPF) was a technology pioneering mission designed to test key technologies required for gravitational wave detection in space. In the low frequency regime (milliHertz and below), where space-based gravitational ...