Now showing items 151-170 of 217
Cisneros Fernández, Jose Agustín (Date of defense: 2022-07-07)
(English) There is an increasing interest on the development of neural interfaces able to decipher the neural activity across multiple regions of the brain. The ultimate goal is understanding how the underlying brain ...
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 ...
Zaragoza Bertomeu, Jordi (Date of defense: 2011-11-25)
Els convertidors multinivell són topologies de convertidors d’electrònica de potència que poden generar tres o més nivells de voltatge en cadascuna de les fases de sortida. Com a resultat, els voltatges i corrents generats ...
Mauricio Ferré, Joan (Date of defense: 2015-12-14)
As CMOS technology scales down, Process, Voltage, Temperature and Ageing (PVTA) variations have an increasing impact on the performance and power consumption of electronic devices. These issues may hold back the continuous ...
Albesa Querol, Joan (Date of defense: 2012-07-18)
This thesis explores the feasibility of using inductive links for a vehicle application where wiring an electronic control unit (ECU) to the sensors or detectors become unfeasible or unpractical. The selected application ...
Pérez López, Carlos (Date of defense: 2016-07-12)
Parkinson's Disease (PD) is a neurodegenerative disorder that currently does not have any known cure. Although there are treatments that enable patients to have a good quality of life over many years, adverse effects, from ...
Cabello Fusarés, Maria (Date of defense: 2019-12-02)
Although silicon (Si) is used in most current commercial power semiconductor components, Si capabilities are insufficient for new energy conversion requirements. Some of its important limitations are related with power ...
Rillo Moral, Francesc (Date of defense: 2016-05-12)
The composting process is Nature's way of recycling organic wastes with a good quality organic fertilizer as a result. This process, though, needs of a thoroughly monitoring of temperature and humidity for a good resulting ...
López Mariño, Simón (Date of defense: 2016-04-22)
The present thesis focuses on the promising semiconductor material kesterite, Cu2ZnSn(S,Se)4, known as CZTS(e), which is used in the second generation of solar cells, generally known as thin film photovoltaics (PV). This ...