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Few-body bound states of two-dimensional bosons
(American Physical Society (APS), 2020-04-07)
Article
Open AccessWe study clusters of the type $A_NB_M$ with N=M=3 in a two-dimensional mixture of A and B bosons, with attractive AB and equally repulsive AA and BB interactions. In order to check universal aspects of the problem, we ... -
Development of flow regime maps for lead lithium eutectic–helium flows
(2020-09-01)
Article
Restricted access - publisher's policynstitute for Plasma Research (IPR), Gandhinagar (India) is currently involved in the design and development of its Lead-Lithium Ceramic Breeder (LLCB) module for testing in the International Thermo-nuclear Experimental ... -
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 ... -
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 ... -
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 ... -
Plume or bubble? Mixed-convection flow regimes and city-scale circulations
(2020-08-25)
Article
Restricted access - publisher's policyLarge-scale circulations around a city are co-modulated by the urban heat islandand by regional wind patterns. Depending on these variables, the circulations fall into different regimes ranging from advection-dominated ... -
Parametric attosecond pulse amplification far from the ionization threshold from high order harmonic generation in He+
(2020-07-31)
Article
Open AccessParametric amplification of attosecond coherent pulses around 100 eV at the single– atom level is demonstrated for the first time by using the 3D time–dependent Schrödinger equation in high–harmonic generation processes ... -
Symmetry-breaking waves and space-time modulation mechanisms in two-dimensional plane Poiseuille flow
(2020-09-18)
Article
Open AccessWe investigate two distinct scenarios of spatial modulation that are candidate mechanisms for streamwise localization of waves in two-dimensional plane Poiseuille flow. The first one stems from a symmetry-breaking bifurcation ...
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