Now showing items 260-279 of 341

    Randomized linear algebra for model order reduction 

    Balabanov, Oleg (Date of defense: 2019-10-11)

    Solutions to high-dimensional parameter-dependent problems are in great demand in the contemporary applied science and engineering. The standard approximation methods for parametric equations can require computational ...

    Reacciones expansivas internas : estudio de los áridos y hormigón de presas 

    Gobbi, Andressa (Date of defense: 2019-01-25)

    A significant part of the pathologies found in concrete dams is related with the presence of unsound aggregates that react with the cement paste. Such reactions may lead to expansions, causing damage and compromising the ...

    A reactive barrier to enhance the removal of emerging organic compounds during artificial recharge of aquifers through infiltration basins 

    Valhondo, Cristina (Date of defense: 2017-02-03)

    Artificial recharge of aquifers through infiltration basins (AR) improves water quality and in- creases groundwater resources, which make of it an appropriate technique for the renaturalization of waters affected directly ...

    Real-time solutions of parametric thermo-hydro-mechanical problems with proper generalized decomposition 

    Moaven, Arash (Date of defense: 2023-07-04)

    (English) The Proper Generalized Decomposition (PGD) is a mathematical framework belonging to the Model Order Reduction (MOR) class of techniques. To the best of the author's knowledge, this methodology has not been applied ...

    Recomendaciones para el proyecto de puentes de ferrocarril con aparatos de apoyo de núcleo de plomo (LRB) en zonas sísmicas 

    Bellido Recoder, Lucía (Date of defense: 2021-10-25)

    Railway bridges located at seismic zones are particularly complex structures that present exceptional difficulties due to the existence of the track and the phenomena associated to it called track-bridge interaction. The ...

    Recovery of phycobiliproteins and biogas from microalgae treating wastewater 

    Arashiro, Larissa Terumi (Date of defense: 2020-07-02)

    Water is undoubtedly the most essential resource of humanity. However. supplying the human population with clean water has been a major challenge for decades. Contaminants in wastewaters endanger water bodies and the ...

    Redistribución del uso del espacio viario como gestor eficiente de movilidad 

    González Guzmán, Carlos Alberto (Date of defense: 2021-03-18)

    The efficient and equitable use of urban road space considered as a public good and a scarce resource, leads to giving priority to sustainable transport modes (walking, cycling and public transport). Private vehicle sees ...

    Reduced order modeling for smart grids' simulation and optimization 

    Malik, Muhammad Haris (Date of defense: 2017-02-28)

    This thesis presents the study of the model order reduction for power grids and transmission networks. The specific focus has been the transient dynamics. A mathematical viewpoint has been adopted for model reduction. Power ...

    Refuerzo a cortante de estructuras de hormigón armado con laminados de polímeros reforzados con fibras (FRP) : verificación experimental. 

    Pujol Sánchez, Mireia (Date of defense: 2018-06-26)

    The use of externally bonded fibre reinforced polymers, FRP, for strengthening reinforced concrete (RC) beams or columns is an alternative to other traditional strengthening techniques due to its high strength-to-weight ...

    Refuerzo de estructuras de hormigón armado y pretensado por conversión a sección mixta mediante hidrodemolición 

    Cots Corominas, Carles (Date of defense: 2022-05-06)

    This thesis develops a new structural strengthening technique: converting existing reinforced concrete structures to composite sections by inserting connectors after controlled demolition with high-pressure water. The key ...

    Remobilització dels contaminants orgànics persistents en els ecosistemes polars costaners 

    Casal Rodríguez, Paulo (Date of defense: 2018-11-12)

    Persistent organic pollutants (POPs) constitute an heterogeneous group of chemical substances of great environmental relevance. Its persistence, bioaccumulation, long-range transport potential and negative effects on health ...

    Retinoic acid signaling pathway : gene regulation during the onset of puberty in the European sea bass. 

    Medina Henríquez, Paula Javiera (Date of defense: 2019-07-08)

    European sea bass (Dicentrarchus labrax) aquaculture is a thriving industry in Spain where it reached about 23,500 t and a market value of approximately 133 million euros. However, most of the sea bass farms produce a high ...

    Retroflections in the tropical Atlantic Ocean 

    Vallès Casanova, Ignasi (Date of defense: 2021-10-19)

    The upper ocean circulation is the area of confluence of two major vertical cells: the large-scale overturning Atlantic Meridional Overturning Circulation (AMOC) and the regional relatively shallow Subtropical Cells (STCs). ...

    Risk-based highway bridge inspection intervals 

    Anitori, Giorgio (Date of defense: 2021-04-23)

    Infrastructure maintenance programs establish schedules for routine inspections of highway bridges with little consideration of their current conditions. The time interval between two inspections is traditionally set based ...

    Rockfall analysis : failure, fragmentation and propagation characterization : a fractal fragmentation of rockfalls 

    Ruiz Carulla, Roger (Date of defense: 2018-07-02)

    The present thesis aims at the analysis of the fragmentation of rockfalls. The fragmentation is a complex phenomenon poorly understood with a lack of tools to reproduce it on rockfall simulators. The effect of fragmentation ...

    The role of persistent organic pollutants on Prochlorococcus photosynthetic capability under the global change scenario 

    Fernández Pinos, María del Carmen (Date of defense: 2016-07-15)

    This thesis aims to assess the effects of the complex mixture of organic pollutants on the Prochlorococcus photosynthetic capability, in field, and at sublethal level, in the multifactorial context of the global change. ...

    Saharan dust deposition effects on production in the Mediterranean Sea 

    Gallisai, Rachelle (Date of defense: 2016-11-04)

    The potential capacity of fertilization of surface oceans by atmospheric deposition is of scientific interest. This is especially true in the oligotrophic Mediterranean Sea. Its surface waters are extremely poor in nutrients ...

    Seasonal Arctic sea ice predictability and prediction 

    Cruz García, Rubén (Date of defense: 2020-07-01)

    Arctic sea ice plays a central role in the Earth’s climate. Changes in the sea ice on seasonal-to-interannual timescales impact ecosystems, populations and a growing number of stakeholders. A prerequisite for achieving ...

    Seawater intrusion, transition zone dynamics and reactive mixing : example of Argentona coastal alluvial aquifer 

    Goyetche, Tybaud (Date of defense: 2021-07-19)

    Freshwater quality and availability in coastal areas are affected by seawater intrusion into coastal aquifers. While coastal water quality and coastal ecosystems can be significantly affected by pollutants discharged into ...

    Seismic design of steel beam-to-column joints with reduced beam section using European hotrolled 

    Jiménez Torres, Adrià (Date of defense: 2021-12-22)

    The design rules on Reduced Beam Sections (RBS) are covered in the Eurocodes in EN1998-3 as a possible solution to improve rotation capacity of beams for the retrofit of existing structures. The design rules are very similar ...