Now showing items 73-92 of 217
Arellano Espitia, Francisco (Date of defense: 2023-10-10)
(English) In recent years, there has been significant attention from both the academic and industry sectors towards condition-based maintenance of rotating systems. This attention stems from the high relevance of these ...
Morales Vilches, Anna Belén (Date of defense: 2015-07-23)
El desarrollo de la tecnología fotovoltaica de silicio cristalino ha llegado al punto en que la mejora de los dispositivos pasa, no tanto por un aumento de la eficiencia, como por la reducción del coste de fabricación. En ...
Novoa Díaz, Daniel Fernando (Date of defense: 2014-05-14)
This work is a contribution to a measuring system based on ultrasonic techniques to analyse and monitor, in real time, malolactic fermentation (MLF) in red wine, both at industrial and semi-industrial level. In the wine ...
Villasevil Marco, F. Xavier (Francesc Xavier) (Date of defense: 2006-10-11)
Amb els materials utilitzats actualment en la fabricació de les cèl·lules termoelèctriques i amb les geometries utilitzades, no és possible millorar, en un rang determinat de temperatures, característiques tals com la ...
Torrents Dolz, Josep Maria (Date of defense: 1996-11-25)
La humitat és un dels paràmetres més característics del sòl i el seu coneixement té interès des de diversos àmbits de la enginyeria. Conèixer la humitat mitjançant la impedància elèctrica planteja un estudi acurat de les ...
Nicolás Apruzzese, Joan (Date of defense: 2013-09-16)
Multilevel converter technology has been receiving increasing attention during the last years due to its important advantages compared to conventional two-level conversion. Multilevel converters reduce the voltage across ...
Mateos Martín, José Ignacio (Date of defense: 2015-11-27)
The primary purpose of this thesis is the design, development and validation of a system capable of measuring magnetic field with low-noise conditions at sub-millihertz frequencies. Such instrument is conceived as a part ...
El Gharbi, Mariam (Date of defense: 2023-10-06)
(English) Wearable antenna sensors are a promising technology for developing new applications in the healthcare field since textiles are widely used by everyone due to the maturity of textile manufacturing. According to ...
Canziani Amico, Franco (Date of defense: 2022-07-22)
In 2015 the United Nations established the 17 Sustainable Development Goals: a set of interrelated objectives and a guide to reach a more sustainable and higher quality future for all humanity. The goals were set with a ...
Ripoll Vercellone, Edgar (Date of defense: 2022-04-01)
The Internet of Things is a trending topic these days. However, energy is often the major job stopper for broad adoption of this technology, which have three tight constraints: extremely cost oriented, long service life ...
Acosta Cambranis, Fernando Geovany (Date of defense: 2023-07-11)
(English) Greater interest in multiphase electrical systems has led to their increased use in electric traction, renewable energy generation, energy transmission, and various industrial applications. This growing interest ...
Soler, Victor (Date of defense: 2019-11-26)
A sustainable future requires efficient power electronic converters at any stage of the electrical energy consumption. Silicon carbide (SiC) is one of the most technologically advanced wide bandgap semiconductors that can ...
Iannazzo Soteras, Mario E. (Mario Enrique) (Date of defense: 2017-09-22)
This doctoral thesis approaches the design requirements for future high / ultra-high data rate (from 100 Mbps to 100 Gbps) nanotransceivers (nanoTRx) applied to wireless nanonetworks which imply short/ultra-short distance ...
Trulls Fortuny, Xavier (Date of defense: 2012-07-06)
System-on-Chip (SoC) was adopted in recent years as one of the solutions to reduce the cost of integrated systems. When the SoC solution started to be used, the final product was actually more expensive due to lower yield. ...
Brandano, Davide (Date of defense: 2012-03-09)
Increasing memory capacity in mobile devices, is driving the need of high-data rates equipment. The 7 GHz band around 60 GHz provides the opportunity for multi-gigabit/sec wireless communication. It is a real opportunity ...
Masmitjà Rusiñol, Gerard (Date of defense: 2019-09-25)
The photovoltaic industry is mainly dominated by crystalline silicon (c-Si) solar cells, in which contact selectivity is usually achieved by doping the wafer surfaces with phosphorous (n+) and boron (p+) by means of high ...
Valle Fraga, Juan José (Date of defense: 2022-04-06)
Today, the most common form of mass-production semiconductor device fabrication is Complementary Metal-Oxide Semiconductor (CMOS) technology. The dedicated Integrated Circuit (IC) interfaces of commercial sensors are ...
Rodríguez Vilamitjana, Enric (Date of defense: 2011-02-28)
Trends in battery-operated portable applications require further miniaturization and eventually on-chip integration of power processing circuits along with their optimum power management control circuits, considered as key ...
Riu Costa, Pere J. (Pere Joan) (Date of defense: 1991-11-29)
Se analiza la obtención de imágenes que representan la estructura de secciones del cuerpo humano por medio de la medida de impedancia eléctrica. El método propuesto se basa en el comportamiento frecuencial de la conductividad ...
Ovejas Benedicto, Victòria Júlia (Date of defense: 2017-11-24)
In recent years, portable applications have experienced an exponential growth and consequently, the demand of batteries has increased accordingly. It is widely known, though, that the performance of batteries decreases ...