Exploració per autor "Ramos Castro, Juan José"
Ara es mostren els items 55-74 de 98
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LISA pathfinder micronewton cold gas thrusters: in-flight characterization
(American Physical Society (APS), 2019-06-28)
Article
Accés obertThe LISA Pathfinder (LPF) mission has demonstrated the ability to limit and measure the fluctuations in acceleration between two free falling test masses down to sub-femto-g levels. One of the key elements to achieve such ... -
LISA pathfinder performance confirmed in an open-loop configuration: results from the free-fall actuation mode
(American Institute of Physics (AIP), 2019-09-11)
Article
Accés obertWe report on the results of the LISA Pathfinder (LPF) free-fall mode experiment, in which the control force needed to compensate the quasistatic differential force acting on two test masses is applied intermittently as a ... -
LISA Pathfinder platform stability and drag-free performance
(American Physical Society (APS), 2019-04-15)
Article
Accés obertThe science operations of the LISA Pathfinder mission have demonstrated the feasibility of sub-femto-g free fall of macroscopic test masses necessary to build a gravitational wave observatory in space such as LISA. While ... -
Low-frequency noise characterization of a magnetic field monitoring system using an anisotropic magnetoresistance
(2015-11-01)
Article
Accés obertA detailed study about magnetic sensing techniques based on anisotropic magnetoresistive sensors shows that the technology is suitable for low-frequency space applications like the eLISA mission. Low noise magnetic ... -
Measuring the galactic cosmic ray flux with the LISA Pathfinder radiation monitor
(2018-01-31)
Article
Accés obertTest mass charging caused by cosmic rays will be a significant source of acceleration noise for space-based gravitational wave detectors like LISA. Operating between December 2015 and July 2017, the technology demonstration ... -
Micrometeoroid events in LISA Pathfinder
(Institute of Physics (IOP), 2019-09-20)
Article
Accés obertThe zodiacal dust complex, a population of dust and small particles that pervades the solar system, provides important insight into the formation and dynamics of planets, comets, asteroids, and other bodies. We present a ... -
Mixing design, management and engineering students in challenge-based projects
(2016)
Comunicació de congrés
Accés restringit per política de l'editorialThe aim of this work is to describe and discuss the benefits and limitations that have been detected along two iterations of a learning experience that has been carried out by three institutions located in Barcelona: ... -
Monitoring drivers' ventilation using an electrical bioimpedance systems: tests in a controlled enviornment
(Springer Berlin Heidelberg, 2014-11-02)
Capítol de llibre
Accés restringit per política de l'editorialAs improving road safety is one of the first aims in the automotive world, several new techniques and methods are being researched in recent years. Some of them consist of monitoring the driver behavior to detect ... -
New indices for quantification of the power spectrum of heart rate variability time series without the need of any frequency band definition
(IOP PUBLISHING LTD, 2011-06-07)
Article
Accés restringit per política de l'editorialThis paper presents a new family of indices for the frequency domain analysis of heart rate variability time series that do not need any frequency band definition. After proper detrending of the time series, a cumulated ... -
Noise characterization of an atomic magnetometer at sub-millihertz frequencies
(2015-04-01)
Article
Accés obertNoise measurements have been carried out in the LISA bandwidth (0.1-100 mHz) to characterize an all-optical atomic magnetometer based on nonlinear magneto-optical rotation. This was done in order to assess if the technology ... -
Novel indices of ventricular repolarization to screen post myocardial infarction patients
(Elsevier, 2006-05)
Article
Accés obertWe propose novel indices of ventricular repolarization intervals, the JTp/JT, Tpe/JTp and Tpe/JT ratios. These indices have been compared with the duration of the ventricular repolarization intervals and other ratios in ... -
Novel methods to measure the gravitational constant in space
(American Physical Society (APS), 2019-09-20)
Article
Accés obertWe present two novel methods, tested by LISA Pathfinder, to measure the gravitational constant G for the first time in space. Experiment 1 uses electrostatic suspension forces to measure a change in acceleration of a test ... -
Obtención empírica del límite frecuencial entre las bandas de baja y altra frecuencia en análisis de variabilidad del ritmo cardíaco: aplicación en ratas y humanos
(2009-11)
Text en actes de congrés
Accés obertSe propone un nuevo método para la determinación empírica de los límites entre las bandas de baja frecuencia y alta frecuencia del espectro de potencia de las series RR en los estudios de variabilidad del ritmo cardíaco. ... -
On the use of fractional calculus to improve the pulse arrival time (PAT) detection when using photoplethysmography (PPG) and electrocardiography (ECG) signals
(Public Library of Science (PLOS), 2024-02-16)
Article
Accés obertThe pulse arrival time (PAT) has been considered a surrogate measure for pulse wave velocity (PWV), although some studies have noted that this parameter is not accurate enough. Moreover, the inter-beat interval (IBI) time ... -
Overview of Alainsat-1 Mission: A remote sensing student nanosatellite
(Institute of Electrical and Electronics Engineers (IEEE), 2023)
Text en actes de congrés
Accés obertAlainSat-1 is an educational and scientific nanosatellite project that was initiated in late 2019 by the IEEE Geoscience and Remote Sensing Society (GRSS) along with National Space Science and Technology Center (NSSTC) of ... -
Precision charge control for isolated free-falling test masses: LISA pathfinder results
(American Physical Society (APS), 2018-09-11)
Article
Accés obertThe 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
(Universitat Politècnica de València, 2016)
Comunicació de congrés
Accés obertEl 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)
(European Organization for Nuclear Research (CERN), 2021-06-30)
Article
Accés obertThis 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
(Institute of Electrical and Electronics Engineers (IEEE), 2015)
Text en actes de congrés
Accés restringit per política de l'editorialThe 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
(2020-01-06)
Article
Accés obertHeart 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 ...
