Now showing items 1817-1836 of 5534
Wang, Yongjie (Date of defense: 2023-02-23)
(English) Climate change and global energy demand urge the development of renewable energy sources for worldwide power supply. Photovoltaic devices that convert solar energy directly into electricity are the most promising, ...
Albo-Puigserver, Marta (Date of defense: 2019-10-18)
Mediterranean marine ecosystems are fundamentally driven by their pelagic communities and small and medium-size pelagic fishes (SMPF) play crucial ecological roles. Although fluctuations of the populations of these organisms ...
Grinyó Andreu, Jordi (Date of defense: 2016-10-17)
Technological development and increased availability of remotely operated vehicles and manned submersibles have significantly increased accessibility to deep environments revealing the presence of rich and diverse macrobenthic ...
Zamora Terol, Sara (Date of defense: 2013-09-29)
Copepods have a crucial role in the pelagic marine ecosystem, for their participation in the nutrient cycling and carbon export in biogeochemical cycles, and their role as link organisms between primary producers and higher ...
Pérez Álvarez, Nuria (Date of defense: 2014-07-23)
Currently, resources that may be spent in health care are limited so it is necessary to rationalize their consumption and prioritise their allocation to the options with higher health outcome and economic sustainability. ...
León Gutiérrez, Xavier (Date of defense: 2013-07-05)
Large scale computing infrastructures need scalable and effi cient resource allocation mechanisms to ful l the requirements of its participants and applications while the whole system is regulated to work e ciently. ...
Saura Agel, Ma. José (Date of defense: 2016-12-15)
In this dissertation, I propose a theoretical model to rate enterprises in the context of social, solidarity or popular economics . The model defines a model of three dimensions to classify these organizations, going from ...
Corrales Ribas, Xavier (Date of defense: 2019-03-21)
Firstly, I reviewed modelling approaches that were used to assess the impact of invasive alien species (IAS) in aquatic ecosystems. According to the review, multispecies/ecosystem mechanistic models dominated the applications, ...
Bori Dols, Jaume (Date of defense: 2016-06-29)
Environmental impacts associated to the unstoppable growth of human population are threatening ecosystems worldwide. Among them, soil ecosystems are becoming increasingly degraded due to their unsustainable use and management, ...
Kuzmanović, Maja (Date of defense: 2017-06-23)
More than one-third of Earths available freshwater is used for anthropogenic purposes, which has led to its contamination by numerous chemical compounds. Their presence in the environment might have negative consequences ...
Jiménez Jiménez, Ma. José (María José) (Date of defense: 2016-02-04)
It is well known the important role that difference equations play in several problems of the engineering or of the science. However, whereas the expression of the solutions when the coefficients of the equations are ...
Santoyo González, Alejandro (Date of defense: 2020-09-08)
This thesis focuses on how to optimize the placement of the Edge Computing infrastructure for upcoming 5G networks. To this aim, the core contributions of this research are twofold: 1) a novel heuristic called Hybrid ...
Castillo Reyes, Octavio (Date of defense: 2017-10-23)
Electromagnetic methods (EM) are an invaluable research tool in geophysics whose relevance has increased rapidly in recent years due to its wide industrial adoption. In particular, the forward modelling of three-dimensional ...
Parga Vázquez, Andrea María (Date of defense: 2018-01-17)
The construction of each building appears with respect to the space between others. These volumes give way to future edifications. Each proposal participates in the inexhaustible character of the urban complex that surrounds ...
Domenech Jardí, Ruth (Date of defense: 2011-11-18)
Increased wildfire activity over the last years has made fire managers to become more concerned about the effectiveness of current fuel treatment practices to reduce fire risk and severity. Fuel treatments lead to changes ...
Martínez López, Roberto (Date of defense: 2002-07-24)
El amonio es el catabolito mayoritario en los peces, significando más del 60% de los residuos nitrogenados totales, y siendo la fracción no ionizada (ANI) un compuesto tóxico tanto para el medio de cultivo como para el ...
Martín Fuentes, E. (Enric) (Date of defense: 2007-09-13)
El aluminio y sus aleaciones son las matrices metálicas más utilizadas para la fabricación de materiales compuestos, debido a su baja densidad, capacidad de endurecimiento por precipitación, buena resistencia a la corrosión ...
Clarens i Blanco, Frederic (Date of defense: 2004-07-23)
La gestió dels residus radioactius d'alta activitat suposen un dels majors reptes tecnològics de la societat actual, considerant-se la disposició en un Magatzem Geològic Profund (MGP) com la única alternativa viable per a ...
Pérez Madrigal, Domingo (Date of defense: 2018-06-20)
The use of bituminous material milled from the pavement (known as Reclaimed Asphalt Pavement, or RAP) in the manufacture of recycled bituminous mixtures is growing day by day due to the economic and environmental benefits ...
Varela Castro, Gonzalo (Date of defense: 2013-06-07)
El presente trabajo de investigación se enfoca en el estudio del comportamiento a fluencia y ductilidad en caliente de los denominados aceros de construcción y su dependencia con la composición química, concretamente el ...