Now showing items 140-159 of 212
López Rodríguez, Gema (Date of defense: 2016-12-05)
The goal of this thesis is the fabrication of high-efficiency interdigitated back-contact (IBC) c-Si solar cell at low temperature and low-cost manufacturing technology. This thesis proposes a new concept and at the same ...
Beristáin Jiménez, José Antonio (Date of defense: 2005-06-23)
En esta tesis se realiza el análisis y la síntesis de inversores bidireccionales con aislamiento en alta frecuencia. Entre las aplicaciones que se contemplan podemos destacar: sistemas de alimentación fotovoltaicos, sistemas ...
Florentín, Matthieu (Date of defense: 2016-05-20)
Silicon (Si) power device’ technologies have reached a high maturity level, but current limitations on mechanic, temperature operation and electric performances require to investigate other semiconductor materials that ...
Prego Borges, Jose Luis (Date of defense: 2010-10-25)
La técnica de las ondas de Lamb acopladas por aire representa un importante avance en el área de los Ensayos No Destructivos (END) de materiales laminares.<br/>Sin embargo la compleja naturaleza de las vibraciones mecánicas ...
Pons Solé, Marc (Date of defense: 2012-10-02)
In nowadays nanometer technology nodes, the semiconductor industry has to deal with the new challenges associated to technology scaling. On one hand, process developers face increasing manufacturing cost and variability, ...
Bermejo Sánchez, Sergio (Date of defense: 2000-03-29)
Premi extraordinari ex-aequo en l'àmbit d'Electrònica i Telecomunicacions. Convocatoria 1999 - 2000
Cárdenas Araujo, Juan José (Date of defense: 2013-07-11)
Nowadays, it would be very difficult to deny the need to prioritize sustainable development through energy efficiency at all consumption levels. In this context, an energy management system (EMS) is a suitable option for ...
Margarit Taulé, Josep Maria (Date of defense: 2015-11-03)
This PhD dissertation describes the research and development of a new low-cost medium wavelength infrared MWIR monolithic imager technology for high-speed uncooled industrial applications. It takes the baton on the latest ...
Aymerich Gubern, Joan (Date of defense: 2021-03-18)
Electrochemical sensors are expanding rapidly over other chemical sensoring technologies because of their potential to generate precise, selective, miniaturized and cost-effective analytical devices. These features satisfy ...
Martínez Padró, Enoc (Date of defense: 2021-07-09)
There has always been background sound in the oceans due to natural factors. However, since the first hydrophone deployments at mid-20th century, measured ocean sound levels have been steadily rising due to an increment ...
Aliau Bonet, Carles (Date of defense: 2015-12-21)
Electric conductivity is a good estimator of water quality. It can be measured by using cells with direct contact between the electrodes and the electrolyte, inductive cells or cells with capacitive electrodes. The use of ...
Ballesteros Larrota, Dora María (Date of defense: 2013-07-15)
This work presents two speech hiding methods based on a bio-inspired concept known as the ability of adaptation of speech signals. A cryptographic model uses the adaptation to transform a secret message to a non-sensitive ...
García Leyva, Lancelot (Date of defense: 2016-01-19)
In future scenarios of low power and low voltage the electronic systems will present a high error ratio or voltage fluctuations due to dramatically signal to noise ratio. These transient errors can affect the logical results ...
López Palma, Manuel (Date of defense: 2020-10-23)
In this work, a new method is presented to quantify the attention paid by people to the different objects in their environment. The new metric models the eye to determine the attention given and quantifies that attention ...
Gómez Pau, Álvaro (Date of defense: 2017-07-11)
Integrated circuit industry has always faced the necessity of testing and verifying the fabricated ICs in order to guarantee that no faulty circuits reach the market as well as the fabricated devices function within design ...
Rey López, Juan Manuel (Date of defense: 2016-07-16)
The present doctoral thesis is focused on the analysis and design of control strategies for the secondary control layer of islanded AC microgrids without the use of communications. The work is submitted as a compendium of ...
Urbano González, Eva María (Date of defense: 2023-06-01)
(English) The current energy transition fosters the insertion of renewable energies and system decentralisation intending to achieve a more secure, sustainable and efficient energy market. The industry can play a key role ...
Castilla Fernández, Miguel (Date of defense: 1998-05-28)
El presente trabajo de investigación se ha dedicado al estudio y la caracterización de un conjunto de sistemas electrónicos de potencia basados en convertidores resonantes Quantum con subsistemas de control en modo de ...
Ortega Redondo, Juan Antonio (Date of defense: 1997-12-19)
Esta tesis doctoral contribuye a la búsqueda de alternativas para la sustitución de la técnica clásica demodulación de la radiación infrarroja, basada en unarueda "chopper". Esta técnica de modulación óptica, seutiliza en ...
Pou Félix, Josep (Date of defense: 2002-11-11)
La present tesi doctoral estudia els inversors trifàsics multinivell del tipus denominat de díodes de fixació (diode-clamped converters). Aquests convertidors poden generar tres o més nivells de tensió a cada fase de ...