Departament de Física
Collections in this community
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Articles de revista [1.210]
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Capítols de llibre [45]
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Llibres [5]
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Presentacions [1]
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Reports de recerca [161]
Recent Submissions
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Aerodynamic Technologies for Earth Observation Missions in Very Low earth Orbit
(2018)
Conference report
Restricted access - publisher's policyFlying at VLEO has several advantages such as the increase of the resolution of images recorded by optical instruments, the increase of geospatial position accuracy, the improvement of the signal to noise ratio and the ... -
Analysis and prediction of COVID-19 for EU-EFTA-UK and other countries
(2020-10-19)
External research report
Open AccessThe present report aims to provide a comprehensive picture of the pandemic situation of COVID-19 in the EU countries, and to be able to foresee the situation in the next coming days. We provide some figures and tables ... -
Comparative study of mechanical and electrical relaxations in poly(etherimide). Part 2
(1998-05)
Article
Restricted access - publisher's policyThe curves describing the relaxation behaviour of poly(etherimide) at several frequencies shows in the dielectric lossÈtemperature plot c and b relax- ations centred at [95¡C and 100¡C, respectively, at 10 Hz. The glassÈrubber ... -
The benefits of very low earth orbit for earth observation missions
(2020-08)
Article
Restricted access - publisher's policyVery low Earth orbits (VLEO), typically classified as orbits below approximately 450 km in altitude, have the potential to provide significant benefits to spacecraft over those that operate in higher altitude orbits. This ... -
RF Helicon-based Inductive Plasma Thruster (IPT) Design for an Atmosphere-Breathing Electric Propulsion System (ABEP)
(2020-11)
Article
Restricted access - publisher's policyChallenging space missions include those at very low altitudes, where the atmosphere is source of aerodynamicdrag on the spacecraft. To extend such missions lifetime, an efficient propulsion system is required. Onesolution ... -
Translationally invariant metamirrors for spatial filtering of light beams
(American Physical Society (APS), 2020-07-01)
Article
Open AccessWe propose a translationally invariant metamirror for light filtering in reflection. The device consists of athin transverse grating in the micron scale positioned in front of a flat mirror. We analyze the performance ... -
The dynamics of digits: calculating Pi with Galperin's billiards
(Multidisciplinary Digital Publishing Institute (MDPI), 2020-04-01)
Article
Open AccessIn Galperin billiards, two balls colliding with a hard wall form an analog calculator for the digits of the number p . This classical, one-dimensional three-body system (counting the hard wall) calculates the digits of p ... -
Analysis and prediction of COVID-19 for EU-EFTA-UK and other countries
(2020-10-16)
External research report
Open AccessThe present report aims to provide a comprehensive picture of the pandemic situation of COVID-19 in the EU countries, and to be able to foresee the situation in the next coming days. We provide some figures and tables ... -
Archaeomagnetic study of a limekiln in the Les Ferreres Roman aqueduct, World Heritage Site of Tarraco
(2020-08-16)
Article
Restricted access - publisher's policyThe aqueduct of Les Ferreres is a major element of the Archaeological Ensemble of Tarraco. Although the ashlars of the aqueduct are stacked without mortar, lime was used in some parts and lime was certainly used in later ... -
Design and development of a hyper-thermal atomic oxygen wind tunnel facility
(Centre National d'Études Spatiales (CNES), 2018)
Conference lecture
Restricted access - publisher's policyA hyper-thermal orbital aerodynamics test facility is described. The Rarefied Orbital Aerodynamics Research facility(ROAR)is a dedicated apparatus designedto simulate the atmospheric flow in very low Earth orbits(VLEO) to ... -
Attitude control for satellites flying in VLEO using aerodynamic surfaces
(British Interplanetary Society, 2020)
Article
Restricted access - publisher's policyThis paper analyses the use of aerodynamic control surfaces, whether passive or active, in order to carry out very low Earth orbit (VLEO) attitude maneuver operations. Flying a satellite in a very low Earth orbit with an ... -
Inductive Plasma Thruster (IPT) for an Atmosphere-Breathing Electric Propulsion System: design and set in operation
(2019)
Conference report
Restricted access - publisher's policyChallenging space missions include those at very low orbits, where the atmosphere is source of significant drag on a satellite. Therefore, an efficient dragcompensation propulsion system is required to extend the mission ...
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