Browsing by Title

Contributions on DC microgrid supervision and control strategies for efficiency optimization through battery modeling, management, and balancing techniques

García Elvira, David (Date of defense: 2021-06-08)

Aquesta tesi presenta equips, models i estratègies de control que han estat desenvolupats amb l'objectiu final de millorar el funcionament d'una microxarxa CC. Es proposen dues estratègies de control per a millorar ...

Contributions on networking techniques for wireless relay channels

Gupta, Smrati (Date of defense: 2014-07-14)

En los últimos años, el relaying ha surgido como una poderosa técnica para mejorar la cobertura y el rendimiento de las redes inalámbricas. En consecuencia, la creciente demanda de servicios basados en redes inalámbricas ...

Contributions on spectral control for the asymmetrical full bridge multilevel inverter

Muñoz Ramirez, Oscar Mauricio (Date of defense: 2010-07-23)

Las topologías de circuitos inversores multinivel pueden trabajar a tensiones y potencias mayores que las alcanzadas por convertidores convencionales de dos niveles. Además, la conversión multinivel reduce la distorsión ...

Contributions on using embedded memory circuits as physically unclonable functions considering reliability issues

Abed Alrazzaq Alheyasat, Abdel Rahman Naser (Date of defense: 2021-07-22)

[eng] Moving towards Internet-of-Things (IoT) era, hardware security becomes a crucial research topic, because of the growing demand of electronic products that are remotely connected through networks. Novel hardware ...

Contributions to aerostructures morphing with piezoelectric actuators

Arnau Cubillo, Albert (Date of defense: 2020-04-03)

Since the first models developed in the late 19th century, the applications of piezoelectric materials have been progressively growing in number. The capacity of these materials to couple electric and mechanic fields makes ...

Contributions to an advanced design of a Policy Management System

Reyes Muñoz, María Angélica (Date of defense: 2003-07-04)

de la Tesis<br/><br/>Las redes de hoy en día presentan un gran crecimiento, una alta complejidad de gestión y los nuevos servicios tienen requerimientos cada vez más estrictos. Es por ello que las plataformas de gestión ...

Contributions to array processing: beamforming, synchronization and localization

Mañosas Caballú, Martí (Date of defense: 2022-05-06)

Aquesta tesi aborda diversos problemes dins del camp de processament de senyals en agrupacions d’antenes. La part principal es centra en el que s’entén purament com processament en agrupacions d’antenes, és a dir, la ...

Contributions to Automatic and Unsupervised MRI Brain Tumor Segmentation: A New Fuzzy Approach

Gordillo Castillo, Nelly (Date of defense: 2010-07-26)

Brain tumors are part of a group of common, non-communicable, chronic and potentially lethal diseases affecting mostfamilies in Europe. Imaging plays a central role in brain tumor management, from detection and classification ...

Contributions to automatic configuration and selection for satisfiability

Pon Farreny, Josep (Date of defense: 2021-07-16)

En l’àrea de les ciències de la computació, és sabut que els algoritmes poden exhibir comportaments completament diferents depenent de com estiguin configurats els seus paràmetres, fet que s’aguditza quan els problemes que ...

Contributions to bluetooth low energy mesh networks

Darroudi, Seyed Mahdi (Date of defense: 2020-09-29)

Bluetooth Low Energy (BLE) has become a popular Internet of Things (IoT) technology. However, it was originally designed to only support the star topology. This PhD thesis investigates and evaluates different Bluetooth Low ...

Contributions to channel modelling and performance estimation of HAPS-based communication systems regarding IEEE Std 802.16TM

Palma Lázgare, Israel Romualdo (Date of defense: 2011-10-24)

New and future telecommunication networks are and will be broadband type. The existing terrestrial and space radio communication infrastructures might be supplemented by new wireless networks that make and will make use ...

Contributions to computed tomography image coding for JPEG2000

Muñoz Gómez, Juan (Date of defense: 2014-01-13)

Avui dia, gràcies als avanços en la ciència mèdica, existeixen diverses tècniques d’imatges mèdiques destinades a tractar de revelar, diagnosticar o examinar una malaltia. Moltes d’aquestes tècniques produeixen grans ...

Contributions to Context-Aware Smart Healthcare: A Security and Privacy Perspective

Batista de Frutos, Edgar (Date of defense: 2022-05-24)

Les tecnologies de la informació i la comunicació han canviat les nostres vides de manera irreversible. La indústria sanitària, una de les indústries més grans i de major creixement, està dedicant molts esforços per adoptar ...

Contributions to earth observation using gnss-r opportunity signals

Rodriguez Alvarez, Nereida (Date of defense: 2011-12-22)

During years a number of satellites have been developed to remotely sense Earth geophysical parameters for weather forecasting and other climate studies. In recent years the use of reflected Global Navigation Satellite ...

Contributions to efficient and secure exchange of networked clinical data : the MOSAIC system

Lluch-Ariet, Magí (Date of defense: 2016-07-22)

The understanding of certain data often requires the collection of similar data from different places to be analysed and interpreted. Multi-agent systems (MAS), interoperability standards (DICOM, HL7 or EN13606) and ...

Contributions to electromechanical systems diagnosis by means data fusion techniques

Delgado Prieto, Miguel (Date of defense: 2012-10-26)

Electromechanical drives have traditionally found their field of application in the industrial sector. However, the use of such systems is spreading to other sectors within the field of transport, such as the automotive ...

Contributions to energy-aware demand-response systems using SDN and NFV for fog computing

Tipantuña Tenelema, Christian José (Date of defense: 2022-03-29)

Ever-increasing energy consumption, the depletion of non-renewable resources, the climate impact associated with energy generation, and finite energy-production capacity are important concerns worldwide that drive the ...

Contributions to Explainability and Attack Detection in Deep Learning

Haffar, Rami (Date of defense: 2023-11-21)

La intel·ligència artificial (IA) és essencial per a diversos propòsits crucials a la vida humana. Tot i això, molts algorismes d'IA, especialment els models d'aprenentatge profund (AP), són caixes negres, cosa que implica ...

Contributions to Formal Communication Elimination for System Models with Explicit Parallelism

Babot Pagès, Francesc Xavier (Date of defense: 2009-10-09)

Els mètodes de verificació formal s'estan usant cada vegada més en la indústria per establir la correctessa i trobar els errors en models de sistemes; per exemple la descripció de hardware, protocols, programes distribuïts, ...

Contributions to GNSS-R earth remote sensing from nano-satellites

Carreno-Luengo, Hugo (Date of defense: 2016-01-21)

Global Navigation Satellite Systems Reflectometry (GNSS-R) is a multi-static radar using navigation signals as signals of opportunity. It provides wide-swath and improved spatio-temporal sampling over current space-borne ...