Browsing by Subject "Gravity"
Now showing items 1-20 of 26
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An extended matter bounce scenario: current status and challenges
(2015-08-01)
Article
Open AccessAs an alternative to the paradigm of slow roll inflation, we propose an extended scenario of the matter bounce cosmology in which the Universe has experienced a quasi-matter contracting phase with a variable background ... -
Analysis of 3D gravity assists
(Universitat Politècnica de Catalunya, 2021-07-13)
Master thesis
Restricted access - author's decision -
Assessment of errors in the transmission of the orientation and cartographic system from the surface to an underground mine
(2020-02-01)
Article
Open AccessAn accurate transmission of the orientation between surface and underground workings, by means of vertical shafts, is a major challenge in the mining industry, especially for deep mines. We assessed the accuracy of this ... -
Barcelona aerobatics zero-g challenge
(Universitat Politècnica de Catalunya, 2013-06-10)
Master thesis (pre-Bologna period)
Restricted access - author's decisionL'experiment que es durà a terme en aquest projecte tracta de determinar l'influència de la gravetat-zero en la capacitat muscular de l'esser humà, mitjançant medicions quantitatives de la força en una extremitat així ... -
Bouncing loop quantum cosmology from F(T) gravity
(2013-05)
Article
Open AccessThe big bang singularity could be understood as a breakdown of Einstein’s general relativity at very high energies. By adopting this viewpoint, other theories that implement Einstein cosmology at high energies might solve ... -
Corrigendum: particle production from marginally trapped surfaces of general spacetimes
(2015-08-24)
Article
Open AccessWe correct some computations presented in section 4.2 of the article (Class. Quantum Grav. {\bf 32} (2015) 085004), concerning the Kerr-Vaidya space-time. The correct, new results, do support the claims in the paper. -
Diseño de plataforma drone para investigación en microgravedad
(Universitat Politècnica de Catalunya, 2017-10-19)
Bachelor thesis
Restricted access - author's decision
Covenantee: GravimavThis work consists on the development and study of a drone platform as a tool for microgravity research. By means of a study of the state of the art, it has been concluded that this drone platform has a great cavity in the ... -
Effects of gravity level on bubble formation and rise in low-viscosity liquids
(2015-05-15)
Article
Open AccessWe present an experimental analysis of the effects of gravity level on the formation and rise dynamics of bubbles. Experiments were carried out with millimeter-diameter bubbles in the hypergravity environment provided by ... -
Entre la masa y el espacio: la gravedad en la estructuración del espacio paulista
(Departament de Projectes Arquitectònics. UPC, 2014)
Article
Open AccessMás allá del obligado sometimiento a las leyes de la gravedad, la arquitectura paulista desarrolla una serie de estrategias destinadas a alterar la percepción de los atributos gravitatorios más elementales: en la relación ... -
ESA/ELGRA Gravity-Related Research Summer School: an introduction to microgravity and hypergravity research for university students
(2021-02)
Article
Open AccessThe European Low Gravity Research Association (ELGRA) and the European Space Agency (ESA) co-organise since 2016 a Summer School on gravity-related research in the frame of ESA Academy’s Training and Learning Programme. ... -
Estructura pel càlcul del centre de gravetat d'un vehicle mitjançant una bàscula fixa instal·lada a terra
(Universitat Politècnica de Catalunya, 2020-07-09)
Master thesis
Open AccessEl centre de gravetat d’un vehicle és un dels elements més importants que es pot necessitar en tot el procés de desenvolupament d’un cotxe. La col·locació d’aquest centre de gravetat respecte el vehicle és vital principalment ... -
Front and domain growth in the presence of gravity.
(American Physical Society, 1993-10-01)
Article
Open AccessFront and domain growth of a binary mixture in the presence of a gravitational field is studied. The interplay of bulk (and surface) diffusion mechanisms is analyzed. An equation for the evolution of interfaces is derived ... -
Gravity currents in a variable density environment: an experimental study
(Universitat Politècnica de Catalunya, 2024-07-01)
Master thesis
Open AccessGravity currents are important in both natural contexts, such as ocean currents and avalanches, and industrial situations, such as wastewater treatment and tunnel fires. Studying these currents is critical for tackling ... -
Hypergravity induces changes in physiology, gene expression and epigenetics in zebrafish
(Universitat Politècnica de Catalunya, 2022-04-29)
Conference lecture
Open AccessAll living organisms that inhabit Earth have evolved under a common value of gravity, which amounts to an acceleration of 9.81 m/s2 at mean sea level. Changes on it could cause important alterations that affect vital ... -
L'arquitectura de l'espai en condicions de microgravetat
(Universitat Politècnica de Catalunya, 2025-05-13)
Bachelor thesis
Open AccessDes de les primeres cabanes fins als gratacels contemporanis, l'entorn construït ha estat projectat tenint en compte un element inevitable: la gravetat terrestre. Un fenomen físic fonamental en el disseny arquitectònic al ... -
La estructuración del espacio por la gravedad y la luz a lo largo de la historia
(Cátedra Blanca de Barcelona, 2015-07)
Article
Open AccessEl objetivo del presente artículo es señalar la relación existente entre el desarrollo del conocimiento científico sobre la gravedad y la luz desde el ámbito de la física y las estrategias proyectuales destinadas a manipular ... -
La influencia de la comprensión de la gravedad como hecho físico en la configuración del espacio arquitectónico
(2015-04)
Article
Open AccessEs habitual fundamentar la explicación de la evolución de la arquitectura en el desarrollo técnico de los tipos estructurales que han hecho posible, en cada momento de la historia, un planteamiento espacial concreto. Sin ... -
Liquid jet breakup and subsequent droplet dynamics under normal gravity and in microgravity conditions
(2015-07-28)
Article
Open AccessWe present an experimental study on the characteristics of liquid jets in different configurations. We consider jets injected perpendicular to gravity, jets injected parallel to gravity, and jets injected in a microgravity ... -
Minimum-fuel escape from two body sun-earth system
(1999)
Article
Restricted access - publisher's policyEscaping from the solar system by receiving gravity assist from the Earth is considered in this paper. A simple procedure,which neglects the eccentricity of the Earth’s orbit and uses the two-body problem equations and ... -
Modeling oil–mist filtration through coalescence filter media in the presence of gravity-induced flows
(Elsevier, 2023-03)
Article
Open AccessThis paper jointly addresses numerical and physical challenges related to the modeling of coalescence filtration through vertical filter cartridges, put forth in the following papers by Starnoni, M. and C. Manes: • ...
