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Roger Ayats defends his thesis on coherent structures in the transition to turbulence
En Roger Ayats defended his thesis co-directed by l’Alvaro Meseguer and Fernando Mellibovsky on April 22nd at Campus Nord. The thesis, which is entitled "Exact coherent structures in the transitional regime of shear and centrifugal flows", studies the transition mechanisms in shear and centrifugal flows by computing and analysing the role of exact coherent structures.
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Sandeep Babu Gawali defends his thesis on intracavitat spatial filtering in semiconductor lasers
Sandeep Babu Gawali defended his thesis co-directed by Kestutis Staliunas and Jose Trull on December 17 at the Terrassa Campus. Titled "Intracavity spatial filtering in broad area semiconductor lasers", the thesis presents a study on the improvement of the spatial quality of laser beams emitted by high-power semiconductor lasers using photonic crystal filters implemented inside the laser cavity
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Seismicity at the Castor gas reservoir, offshore Spain, was controlled by pore pressure diffusion and the failure of loaded asperities on a shallow fault
An international team led by scientists at GFZ Helmholtz Centre Potsdam, in collaboration with colleagues by Spanish, Italian and US institutions, where collaborates Estefania Blanch from the department of Physics of the EPSEB, is publishing a new scientific work on induced seismicity in Europe in the Journal Nature Communications.
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Sergi Mas-Pujol defends his thesis on the management of imbalances between demand and air capacity using deep learning techniques
Sergi Mas-Pujol defended his thesis co-supervised by Dra. Esther Salamí and Dr. Enric Pastor on May 12, 2023 at the Baix Llobregat Campus. Entitled "Deep Learning techniques for Demand-Capacity Balancing", the thesis studies the use of artificial intelligence techniques to improve the detection of air regulations and how to smooth traffic in periods of high demand, proposing different models that have takes into account the needs of the main parties involved (network management entity and airlines) and a reinforcement learning model based on the use of images.
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Seyedeh Leila Panahi defenses her thesis on new Fe base High entropy metallic glass alloys.
Seyedeh Leila Panahi defended her thesis co-supervised by Pere Bruna and Eloi Pineda on May 8 at the campus Castelldefels. Entitled “Study of relaxation phenomena and local structure evolution in metallic glasses by means of Mossbauer and mechanical spectroscopy”
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Teng Wang defends his thesis on self-adjusting and linearization techniques based on digital predistortion for communications in UAVs.
Teng Wang defended his thesis titled "A Fasto Engineering Approach High Efficiency Power Amplifier Linearization for Avionics Applications" on December 17 at EETAC, directed by Pere L. Gilabert (TSC-UPC). The thesis provides some guidelines for the design of linearizers based on digital predistortion (DPD) from several perspectives: y) improve the performance of open-loop DPD, ii) provide robustness and reduce the computational complexity of the parameter identification subsystem and, iii ) incorporation of machine learning techniques to favor the auto-tuning of power amplifiers and DPD linearizers with various degrees of freedom to be able to maximize energy efficiency while meeting linearity specifications.
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The analysis of a meteorite reveals secrets about the birth of the solar system
An international team of cosmochemists and astrophysicists, which includes Jordi José, a researcher from the Physics Department of the UPC and the Institut d'Estudis Espacials de Catalunya (IEEC), has discovered a meteorite grain forged during the final phases of a star disappeared a long time ago. Encapsulated in a meteorite collected in Antarctica, the tiny grain - only a few microns in size - has shed new light on the terminal phases of star life and how they sow the universe with the building blocks of new stars, planets and life.
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The e-ROSITA X-ray observatory detects for the first time the 'fireball' of a stellar explosion
A research team led by the Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) and of which Glòria Sala, a researcher at the UPC Astronomy and Astrophysics Group and the Institute for Space Studies of Catalonia (IEEC), is a member, has been able to observe, for the first time, an explosion of X-ray light. The study is featured on the cover of the journal Nature.
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The new research on intrinsic correlation between the fraction of liquid-like zones and the beta-relaxation in high-entropy metallic glasses
Researchers Y. J. Duan, E. Pineda and D. Crespo, from the Group of Materials Characterization of the UPC, have made new progress to understand the mechanical properties of high-entropy metallic glasses. The work clarifies the correlation between the fraction of liquid-like zones, i.e. the fraction of atoms that can easily rearrange under the effect of external forces, and the secondary or β relaxation observed in these materials. Besides, the work reveals the high-entropy effect on the supercooled liquid dynamics of the metallic melt.
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Thesis with key insights on climate change is defended in the C&AP Ph.D. program
Dario Zappalà defended his work last April on air temperature dynamics and climate change under the direction of Cristina Masoller in the Nonlinear Dynamics, Nonlinear Optics and Lasers group.
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