Browsing by Title

Contribution to the study of invariant manifolds and the splitting of separatrices of parabolic points

Baldomá, Inmaculada (Date of defense: 2001-01-01)

In general, when beginning to explore any scientific field, one focuses on the generic situations; that is, one centers on the behaviours that appear in “most” of the cases encountered in practice. This methodology ...

Contribution to the study of the mechanisms of action and neuropsychopharmacological effects of MDMA and new β-ketoamphetamines

Ciudad Roberts, Andrés (Date of defense: 2016-01-13)

Drugs of abuse are a matter of great concern, as their use is widespread in all stratums of society, and can entail both acute and long-term negative consequences. For this reason, our research group is devoted to investigating ...

Contribution to the Study of the Role of Arachidonic Acid Metabolism in Airway Inflammatory Diseases (Nasal polyps, Asthma and Cystic Fibrosis)

Jabr, Suha Said Mohammad (Date of defense: 2013-07-16)

Eicosanoids are derived from the fatty acids that make up the cell membrane and nuclear membrane. They begin as a single poly unsaturated fatty acid, the arachidonic acid. (AA) is produced from membrane phospholipids and ...

Contribution to the system architecture design for electromagnetic nano-network communications

Galal Mahmoud Ibrahim, Akram (Date of defense: 2022-10-10)

(English) A nano-network is a communication network at the nano-scale between nano-devices. Nanodevices face certain challenges in functionalities, because of limitations in their processing capabilities and power management ...

Contribution to the traffc engineering in wireless mesh networks

Astudillo León, Juan Pablo (Date of defense: 2020-06-09)

Nowadays, we live in a modern society in which people and devices are interconnected anywhere and anytime. Under this premise, both the infrastructure and the services offered have evolved and diversified in a drastic way. ...

A contribution to the understanding of compression after impact of composite laminates

Liv, Yi (Date of defense: 2017-10-26)

The threat of impact on laminated composite structures has been a serious concern in the aerospace industry and scientific community because the compression load-carrying capacity of the structures, namely Compression 1/2 After ...

Contribution to the validation of best estimate plus uncertainties coupled codes for the analysis of NK-TH nuclear transients

Pericas, Raimon (Date of defense: 2015-05-15)

The calculations that allow the operating license of the nuclear reactors are usually made using conservative methods. This conservatism, often excessive, limits the actual capabilities of the industry to increase energy ...

A contribution to unobtrusive measurement methods for sleep monitoring based on magnetic induction technique

Mahdavi, Hadiseh (Date of defense: 2017-06-30)

Sleep monitoring is of major importance for various medical areas such as the detection and treatment of sleep disorders, assessment of different medical conditions or medications' effects over sleep quality, and mortality ...

A contribution to unobtrusive video-based measurement of respiratory signals

Mateu Mateus, Marc (Date of defense: 2020-12-01)

Due to the growing popularity of video-based methods for physiological signal measurement, and taking into account the technological advancements of these type of devices, this work proposes a series of new novel methods ...

Contribution to wireless access optimization and dynamic enhancement of WCDMA networks

García Lozano, Mario (Date of defense: 2009-01-12)

El despliegue de las redes celulares 3G/3.5G plantea un reto a las estrategias de planificación y optimización radio tradicionales. A diferencia de los sistemas 2G FDMA, cobertura y capacidad están estrechamente ligadas y ...

Contributions based on cross-layer design for quality-of-service provisioning over DVB-S2/RCS broadband satellite system

Rendón Morales, Elizabeth (Date of defense: 2013-03-21)

Contributions based on cross-layer design for Quality-of-Service provisioning over DVB-S2/RCS Broadband Satellite Systems Nowadays, geostationary (GEO) satellite infrastructure plays a crucial role for the provisioning of ...

Contributions from Feminist and Plural Peace Perspectives to Promote Degrowth. A Dialogic Approach in Times of Multiple Interlocking Crises

Bock, Marisol Cristina (Date of defense: 2021-09-22)

Degrowth challenges dominant discourses and growth-based responses to global crises, proposing radical alternatives to foster sustainable livelihoods. This thesis examines degrowth theory through a dialogical and hermeneutic ...

Contributions from VGI and popular sports events to monitor and manage mountain biking within peri-urban natural and protected areas

Nogueira Mendes, Ricardo Manuel (Date of defense: 2023-09-14)

Les activitats recreatives a l'aire lliure en àrees naturals i protegides han crescut a tot el món en estreta relació amb els estils de vida moderns, el temps lliure, la fruició de la natura, el turisme i, en molts casos, ...

Contributions of flywheel systems in wind power plants

Díaz-González, Francisco (Date of defense: 2013-09-30)

The stepwise replacement of conventional power plants by renewable-based ones such as wind power plants could a ect the system behaviour and planning. First, the network stability may be compromised as it becomes less ...

Contributions of formal language theory to the study of dialogues

Grando, Maria Adela (Date of defense: 2009-10-02)

For more than 30 years, the problem of providing a formal framework for modeling dialogues has been a topic of great interest for the scientiﬁc areas of Linguistics, Philosophy, Cognitive Science, Formal Languages, ...

Contributions of the epistemological and didactic analysis: question-answer maps in engineering and in teacher education

Florensa Ferrando, Ignasi (Date of defense: 2018-12-14)

Durant aquestes últimes dècades hi ha hagut un moviment important que promou un canvi en les institucions escolars i, més concretament, en com els processos d'ensenyament i aprenentatge es desenvolupen. No obstant això, ...

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 ...