Browsing by Title

Glioblastoma tras radioterapia: estudio de la supervivencia y del patrón de recaída en relación con la localización de la lesión respecto a la zona subventricular y la dosis de radiación recibida en dicha area

Comas Antón, Sílvia (Date of defense: 2019-02-28)

Antecedentes: El glioblastoma (GB) es el tumor primario más frecuente y agresivo del sistema nervioso central en adultos, asociándose a un promedio de supervivencia muy bajo de 15 meses. Varios estudios preclínicos y ...

Global assessment of marine paleoproductivity proxies

Raja Sanchez, Maria (Date of defense: 2019-07-19)

La productivitat primària (PP) marina és un procés clau en el cicle global del carboni marí i, per tant, en el clima del nostre planeta. L’obtenció d’informació quantitativa de PP en el passat es basa en models biogeoquímics, ...

Global change and forest nutrient stoichiometry. The foliar elemental composition of woody plants and its drivers

Vallicrosa Pou, Helena (Date of defense: 2021-12-16)

Aquesta tesi se centra al voltant de la composició química elemental de les fulles de les plantes llenyoses i té com a objectiu establir-hi relacions ecològiques. Al llarg dels seus diferents capítols explora la composició ...

Global change and the uncertain future of biodiversity in Mediterranean-type ecosystems: insights from a strategic foresight process

Regos Sanz, Adrián (Date of defense: 2015-11-16)

La conservación requiere una previsión estratégica que permita abordar con eficacia los retos actuales que plantea el cambio global. La cuenca Mediterránea ha sido identificada como área prioritaria para la conservación, ...

Global changes in headwater streams: effects of hydrological and nutrient fluctuations on the quality of basal resources = Canvis globals en rius de capçalera: efectes de les fluctuacions hidrològiques i dels nutrients en la qualitat dels recursos basals

Sanpera Calbet, Isis (Date of defense: 2014-04-11)

Streams are complex and highly diverse ecosystems. Within the stream network, headwater streams (1st to 3rd order) are highly important. Headwaters represent most of the total length, influence the structure and functioning ...

Global ecological drivers of transpiration regulation in trees

Flo Sierra, Víctor (Date of defense: 2021-03-17)

Global evaluation of the fitness and virulence determinants in the phytopathogen Ralstonia solanacearum

Pedro Jové, Roger de (Date of defense: 2023-05-19)

[eng] Losses to plant pathogens pose a major threat to global agriculture and food security worldwide. In the context of globalisation and climate change, the emergence and dispersion of pathogens resistant to conventional ...

Global geometry of surfaces defined by non-positive and negative at infinity valuations

Moreno Ávila, Carlos Jesús (Date of defense: 2021-07-15)

We consider plane divisorial valuations of Hirzebruch surfaces and introduce the concepts of non-positivity and negativity at infinity. We prove that the surfaces given by valuations of the last types have nice global and ...

Global governance as promise-making. Negotiating and monitoring learning goals in the time of SDGs

Fontdevila Puig, Clara (Date of defense: 2021-04-16)

Aquesta tesi té com a objectiu examinar els processos d’establiment d’objectius globals en educació mitjançant un estudi de cas de la negociació l’Objectiu de Desenvolupament Sostenible 4 (ODS4). L’establiment d’objectius ...

Global Hamiltonian dynamics on singular symplectic manifolds

Oms, Cédric (Date of defense: 2020-10-02)

In this thesis, we study the Reeb and Hamiltonian dynamics on singular symplectic and contact manifolds. Those structures are motivated by singularities coming from classical mechanics and fluid dynamics. We start by ...

Global illumination techniques for the computation of hight quality images in general environments

Pérez Cazorla, Frederic (Date of defense: 2003-05-26)

The objective of this thesis is the development of algorithms for the simulation of the light transport in general environments to render high quality still images. To this end, first we have analyzed the existing methods ...

Global instability in Hamiltonian systems

Schaefer, Rodrigo Gonçalves (Date of defense: 2018-07-11)

In Chapters 1 and 2 of this thesis, we prove that for any non-trivial perturbation depending on any two independent harmonics of a pendulum and a rotor there is global instability. The proof is based on the geometrical ...

Global instability in the elliptic restricted three body problem

Rosa Ibarra, Abraham de la (Date of defense: 2014-06-16)

The goal of this thesis is to show global instability or Arnold's diffusion in the elliptic restricted three body problem (ERTBP) by proving the existence of pseudo-trajectories diffusing along the phase space for certain ...

Global ionospheric maps : estimation and assessment in post-processing and real-time

Roma Dollase, David (Date of defense: 2019-04-09)

The research of this paper-based dissertation is focused on Global Ionospheric Maps (GIM) generation and assessment. In summary, the novelty and thematic unity in this works relies on four different but complementary topics: ...

Global optimization applied to kinetic models of metabolic networks

Pozo Fernández, Carlos (Date of defense: 2012-11-27)

Recientemente, el uso de técnicas de manipulación genética ha abierto la puerta a la obtención de microorganismos con fenotipos mejorados, lo que a su vez ha llevado a unas mejoras significativas en la síntesis de algunos ...

Global patterns in wolf (Canis lupus) ecology: Implications for management = Patrons globals en l'ecologia del llop: Implicacions en la gestió

Sazatornil i Luna, Victor (Date of defense: 2018-12-19)

Environmental authorities, conservation professionals, and several other social sectors frequently demand scientifically sound information to inform policy and decision-making processes. Beyond national or subnational ...