Exploració per autor "Rojas Gregorio, José Ignacio"
Ara es mostren els items 63-82 de 87
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Methods of Multivariable Earthquake Precursor Analysis and a Proposed Prototype Earthquake Early Warning System
Fletcher, Lauren E.; Christensen, Ian A.; Liberda, Jonathan J.; Rojas Gregorio, José Ignacio; Borrero del Pino, Cristina (2007-11)
Text en actes de congrés
Accés obertSignificant advances are being made in earthquake prediction theory; however, a reliable method for forecasting the occurrence of earthquakes from space and/or ground based technologies remains limited to no more than a ... -
Microstructural characterization & viscoelastic properties of AlZnMg & AlCuMg alloys
Rojas Gregorio, José Ignacio (Universitat Politècnica de Catalunya, 2012-01-11)
Tesi
Accés obertThe comprehension of the viscoelastic behaviour of metals is of high interest as these materials are subjected to dynamic loads in most of their structural applications, and also because it enables a deeper understanding ... -
Microstructural characterization & viscoelastic properties of AlZnMgCu alloys for aerospace applications
Rojas Gregorio, José Ignacio; Crespo Artiaga, Daniel (2010-07)
Proposta de tesi
Accés obertThe mechanical properties of materials (and particularly the viscoelastic properties) are intimately linked to their microstructure. Thereby, microstructural transformations are reflected on the viscoelastic behaviour. ... -
Model rocket workshop
Rojas Gregorio, José Ignacio; Villardi de Montlaur, Adeline de; Prats Menéndez, Xavier; García-Berro Montilla, Enrique (Universidad Europea de Madrid (UEM), 2006)
Text en actes de congrés
Accés obert -
Model rocket workshop : a Problem-Based Learning experience for engineering students
Rojas Gregorio, José Ignacio; Prats Menéndez, Xavier; Villardi de Montlaur, Adeline de; García-Berro Montilla, Enrique (International Association of Online Engineering, 2008-12)
Article
Accés obertA Problem-Based Learning (PBL) experience for undergraduate students of aerospace engineering is described in this paper. The experience allows the students to build a model rocket using materials which can be easily ... -
Modeling of the effect of temperature, frequency, and phase transformations on the viscoelastic properties of AA 7075-T6 and AA 2024-T3 Aluminum Alloys
Rojas Gregorio, José Ignacio; Crespo Artiaga, Daniel (2012-12-01)
Article
Accés obertThe viscoelastic response of commercial aluminum alloys 7075-T6 and 2024-T3 as a function of temperature is presented. Experimental data are obtained with a dynamic-mechanical analyzer (DMA) at different loading frequencies ... -
On the static strength of aluminium and carbon fibre aircraft lap joint repairs
Pitta, Siddharth; de la Mora Carles, Victor; Roure Fernández, Francisco; Crespo Artiaga, Daniel; Rojas Gregorio, José Ignacio (2018-10-01)
Article
Accés obertThe behaviour of various aircraft lap joint repair configurations is investigated experimentally and numerically under static loading. The lap joints consist of aluminium alloy (AA) 2024-T3 substrates repaired with twin ... -
Onset frequency of fatigue effects in pure aluminum and 7075 (AlZnMg) and 2024 (AlCuMg) alloys
Rojas Gregorio, José Ignacio; Crespo Artiaga, Daniel (2016-03)
Article
Accés obert -
OpenFOAM computational fluid dynamics simulations of thermal wind generation in mountain/valley configurations
Athota, Rathan Babu; Villardi de Montlaur, Adeline de; Arias Calderón, Santiago; Rojas Gregorio, José Ignacio (2021)
Text en actes de congrés
Accés obertThermal winds appear in mountainous areas and valleys due to temperature gradients caused by the buoyancy effects associated with the diurnal heating-cooling cycle of the lower atmosphere. These winds develop over complex ... -
OpenFOAM numerical analysis of the diurnal cycle of thermally-driven winds on Mars
Arias Calderón, Santiago; Rojas Gregorio, José Ignacio; Villardi de Montlaur, Adeline de (2023)
Text en actes de congrés
Accés obertThe study of Martian winds holds significant scientific interest and potential practical applications. For instance, understanding the dynamics and behaviour of Martian winds is crucial in order to properly evaluate and ... -
Perspectives on OpenFOAM numerical simulations of slope winds in Mars
Rojas Gregorio, José Ignacio; Arias Calderón, Santiago; Villardi de Montlaur, Adeline de (Budapest University of Technology and Economics, 2022)
Comunicació de congrés
Accés obertPlanetary boundary layer phenomena, such as slope winds and nocturnal low-level jets, are frequent on Mars, e.g., whenever diurnal surface temperature variations are significant, and large-scale winds are weak. In particular, ... -
Phase-field modeling of microstructural evolution in primary crystallization
Bruna Escuer, Pere; Pineda Soler, Eloi; Rojas Gregorio, José Ignacio; Crespo Artiaga, Daniel (2014)
Comunicació de congrés
Accés obert -
R-WAKE - System release 2 document
Ruiz Navarro, Sergio; Busto, Javier; Melgosa Farrés, Marc; Rojas Gregorio, José Ignacio; Tarragó, Joan; Dokic, Jelena; Save, Luca; Steen, Meiko (2017-10-05)
Report de recerca
Accés restringit per acord de confidencialitatThis report represents deliverable D4.2 “System Release 2” of the R-WAKE project, which describes the final system resulting from WP4 (System Development) intended to support the research objectives and scope to be addressed ... -
Sensitivity analysis of maximum circulation of wake vortex encountered by en-route aircraft
Rojas Gregorio, José Ignacio; Melgosa Farrés, Marc; Prats Menéndez, Xavier (Multidisciplinary Digital Publishing Institute (MDPI), 2021-07-16)
Article
Accés obertWake vortex encounters (WVE) can pose significant hazard for en-route aircraft. We studied the sensitivity of wake vortex (WV) circulation and decay to aircraft mass, altitude, velocity, density, time of catastrophic wake ... -
Simulations of wind formation in idealised mountain–valley systems using OpenFOAM
Arias Calderón, Santiago; Rojas Gregorio, José Ignacio; Athota, Rathan Babu; Villardi de Montlaur, Adeline de (Multidisciplinary Digital Publishing Institute (MDPI), 2023-01-11)
Article
Accés obertAn OpenFOAM computational fluid dynamics model setup is proposed for simulating thermally driven winds in mountain–valley systems. As a first step, the choice of Reynolds Averaged Navier–Stokes k-e turbulence model is ... -
Socio-economic benefits of using space technologies to monitor and respond to earthquakes
Christensen, Ian A.; Fletcher, Lauren E.; Liberda, Jonathan J.; Rojas Gregorio, José Ignacio; Borrero del Pino, Cristina; García Yarnoz, Daniel (Dr. Rodolfo Monti, 2008-07)
Article
Accés obertEarthquakes represent a major hazard for populations around the world, causing frequent loss of life, human suffering and enormous damage to homes, other buildings and infrastructure. The Technology Resources for Earthquake ... -
Socio-economic benefits of using space technologies to monitor and respond to earthquakes
Christensen, Ian A.; Fletcher, Lauren E.; Liberda, Jonathan J.; Rojas Gregorio, José Ignacio; Borrero del Pino, Cristina; García Yarnoz, Daniel (2008)
Article
Accés restringit per política de l'editorialEarthquakes represent a major hazard for populations around the world, causing frequent loss of life, human suffering and enormous damage to homes, other buildings and infrastructure. The Technology Resources for Earthquake ... -
Study on Mechanical Relaxations of 7075 (Al–Zn–Mg) and 2024 (Al–Cu–Mg) Alloys by Application of the Time-Temperature Superposition Principle
Rojas Gregorio, José Ignacio; Nicolas, Jorge; Crespo Artiaga, Daniel (2017-04-05)
Article
Accés obertThe viscoelastic response of commercial Al–Zn–Mg and Al–Cu–Mg alloys was measured with a dynamic-mechanical analyzer (DMA) as a function of the temperature (from 30 to 425ºC) and the loading frequency (from 0.01 to 150 ... -
Technology Resources for Earthquake Monitoring and Response (TREMOR)
Harrison, P; Christensen, I; Coffey, E; Hochstein, J; Rojas Gregorio, José Ignacio (-, 2008)
Comunicació de congrés
Accés obertEarthquakes represent a major hazard for populations around the world, causing frequent loss of life, human suffering, and enormous damage to homes, other buildings, and infrastructure. The Technology Resources for ... -
The potential of the sea breeze for wind energy generation in peri-urban coastal areas using small wind turbines
Rojas Gregorio, José Ignacio; Cabrera Agudo, Barbara; Mazón Bueso, Jordi (2016)
Text en actes de congrés
Accés obertThis work investigates the potential of the sea breeze for wind energy generation with small wind turbines. For this purpose, we used wind data recorded in the Llobregat Delta (NE of the Iberian Peninsula) from 1993 to ...