Exploració per autor "Rojas Gregorio, José Ignacio"
Ara es mostren els items 53-72 de 85
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Influence of meteorological phenomena on worldwide aircraft accidents in the period 1967-2010
Mazón Bueso, Jordi; Rojas Gregorio, José Ignacio; Lozano, Miguel; Pino González, David; Prats Menéndez, Xavier; Miglietta, M.M. (2017-12-01)
Article
Accés obertBased on the information available in databases from relevant national and international organizations from 1967 to 2010, an Aviation Weather Accidents Database (AWAD) was built. According to the AWAD, the weather is ... -
Influence of modifier oxides on spectroscopic features of Nd2O3 doped PbO-Ro2O3-WO3-B2O3 glasses (with Ro2O3 = Sb2O3, Al2O3, and Bi2O3)
Prasad, R.N.A.; Venkata Siva, Subbarao Bathula; Neeraja, Katta; Krishna Mohan, N.; Rojas Gregorio, José Ignacio (2020)
Article
Accés obertThe influence of modifier oxides (Ro2O3 = Sb2O3, Al2O3, and Bi2O3) on the spectral analysis of PbO-Ro2O3-WO3-B2O3 glasses doped with Nd3+ ions is investigated in this work. Samples were prepared by the melt quench method, ... -
Informe técnico de compatibilidad aeronáutica de una antena de telefonía en las inmediaciones del Aeropuerto de Sabadell
Rojas Gregorio, José Ignacio (2009)
Report de recerca
Accés obertInforme técnico de compatibilidad aeronáutica de una antena de telefonía en las inmediaciones del Aeropuerto de Sabadell -
Innovative NDT technique based on ferrofluids for detection of surface crack
Rojas Gregorio, José Ignacio; Cabrera, Blai; Musterni Girbau, Gerard; Nicolas, Jorge; Tristancho Martínez, Joshua; Crespo Artiaga, Daniel (2015-11)
Article
Accés obertAn innovative NDT technique is proposed for surface inspection of materials not necessarily magnetic or conductive, based on local magnetic field variations due to ferrofluid deposited in the cracks. The feasibility of the ... -
Innovative NDT technique for detection of surface cracks based on ferrofluids excited with DC and AC magnetic fields
Rojas Gregorio, José Ignacio; Cabrera, Blai; Musterni, Gerard; Nicolas, Jorge; Tristancho Martínez, Joshua; Crespo Artiaga, Daniel (2015-03-31)
Report de recerca
Accés obertAn innovative NDT technique is proposed for surface inspection of materials not necessarily magnetic or conductive, based on local magnetic field variations due to ferrofluid deposited in the cracks. The feasibility of the ... -
INSPIRE: DI 1-1 Technical Note with assessment of state-of-the-art of earthquake precursors identification
Krankowski, Andrzej; Pulinets, Sergey; Cherniak, Iurii; Hernández Pajares, Manuel; Rothkael, Hanna; Rojas Gregorio, José Ignacio; García Rigo, Alberto (2014-12-25)
Report de recerca
Accés restringit per acord de confidencialitat -
INSPIRE: DI 2-1 Technical Note describing the design and development of the database with performance criteria
Krankowski, Andrzej; Hernández Pajares, Manuel; Pulinets, Sergey; Cherniak, Iurii; Rothkael, Hanna; Rojas Gregorio, José Ignacio; García Rigo, Alberto (2015-01-26)
Report de recerca
Accés restringit per acord de confidencialitat -
Integrated Earthquake Precursor Data Processing & a Proposed Prototype Earthquake Early Warning System
Hochstein, J. D.; Fletcher, Lauren E.; Rojas Gregorio, José Ignacio; Christensen, Ian A.; García, D.; Borrero, C. (2008)
Comunicació de congrés
Accés obert -
Investigation on repairs of aircraft composite structures made with various joining techniques
Pitta, Siddharth; Roure Fernández, Francisco; Crespo Artiaga, Daniel; Rojas Gregorio, José Ignacio (2018)
Comunicació de congrés
Accés restringit per política de l'editorialIn the race for developing aircraft with lighter airframe, aiming at increasing aircraft payload and/or fuel efficiency, the shift from conventional metal structures to light-weight composite structures has attracted ... -
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, ...