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Université de Fribourg

Interactions of "Sarracenia purpurea" and its inquilines : comparing Europe and North America

Zander, Axel ; Bersier, Louis-Félix (Dir.)

Thèse de doctorat : Université de Fribourg, 2016 ; no. 1984.

Sarracenia purpurea is a carnivorous pitcher plant from North America and a model system for aquatic communities. After the pitchers fill up with rainwater, a food web forms in these detritus-fueled ecosystems ranging from bacteria to insect larvae, including the top predator Wyeomyia smithii. Two weeks after opening this food webs consists only of a handful of small and fast dispersing species...

Università della Svizzera italiana

Path planning for mobile robots in the real world : handling multiple objectives, hierarchical structures and partial information

Guzzi, Jérôme ; Gambardella, Luca Maria (Dir.) ; Giusti, Alessandro (Codir.)

Thèse de doctorat : Università della Svizzera italiana, 2018 ; 2018INFO010.

Autonomous robots in real-world environments face a number of challenges even to accomplish apparently simple tasks like moving to a given location. We present four realistic scenarios in which robot navigation takes into account partial information, hierarchical structures, and multiple objectives. We start by discussing navigation in indoor environments shared with people, where routes are...

Università della Svizzera italiana

Efficient combinatorial optimization algorithms for logistic problems

Papapanagiotou, Vasileios ; Gambardella, Luca Maria (Dir.) ; Montemanni, Roberto (Codir.) ; Schmidhuber, Jürgen (Codir.)

Thèse de doctorat : Università della Svizzera italiana, 2018 ; 2018INFO011.

The field of logistics and combinatorial optimization features a wealth of NP-hard problems that are of great practical importance. For this reason it is important that we have efficient algorithms to provide optimal or near-optimal solutions. In this work, we study, compare and develop Sampling-Based Metaheuristics and Exact Methods for logistic problems that are important for their...

Università della Svizzera italiana

The importance of geographical proximity : Evidence on the concentration of firms, culture and political ideologies

Mantegazzi, Daniele ; Maggi, Rico (Dir.)

Thèse de doctorat : Università della Svizzera italiana, 2018 ; 2018ECO008.

This dissertation proposes three empirical essays focusing on the importance of geographical concentrations along various dimensions in regional economics, dealing with topics regarding agglomeration spillovers, firm performance, culture and soft institutions as well as the geographical concentration of political ideologies. The first chapter aims at empirically verifying whether agglomeration...

Università della Svizzera italiana

Efficient tree-based content-based routing schemes

Khazaei, Koorosh ; Carzaniga, Antonio (Dir.)

Thèse de doctorat : Università della Svizzera italiana, 2018 ; 2018INFO009.

This thesis is about routing and forwarding for inherently multicast communication such as the communication typical of information-centric networks. The notion of Information-Centric Networking (ICN) is an evolution of the Internet from the current host-centric architecture to a new architecture in which communication is based on “named information”. The ambitious goal of ICN is to...

Université de Neuchâtel

Improvement of quality of life through adaptation ? : A qualitative longitudinal approach on households in precarious prosperity in three european countries

Sieber, Rebekka ; Suter, Christian (Dir.) ; Budowski, Monica (Codir.) ; Bonvin, Jean-Michel (Codir.) ; Maeder, Philippe (Codir.)

Thèse de doctorat : Université de Neuchâtel, 2018.

Cette thèse examine l’adaptation à la prospérité précaire en mettant en lien la recherche sur la qualité de vie et celle sur les inégalités sociales. L’accent est mis sur les ménages vivant une situation socio-économique spécifique appelée la prospérité précaire. Ces ménages luttent pour maintenir un niveau de prospérité sécure et constituent une thématique d’actualité...

Université de Fribourg

Novel iron tweezers complexes for hydrogenation and polymerization of olefins

Mafua, Roger ; Jenny, Titus A. (Dir.)

Thèse de doctorat : Université de Fribourg, 2006 ; no. 1503.

L’utilisation des complexes organométalliques comme catalyseurs est devenu un domaine très important de la chimie des matériaux. Cependant et malgré ce développement, les catalyseurs à base de fer(II) sont peu employés dans la polymérisation d’oléfines. Un de rares catalyseur utilisé dans ce contexte est le complexe tridenté diimine pyridine développé par Gibson et Brookhart....

Università della Svizzera italiana

Analysis and optimization of task granularity on the Java virtual machine

Rosà, Andrea ; Binder, Walter (Dir.)

Thèse de doctorat : Università della Svizzera italiana, 2018 ; 2018INFO008.

Task granularity, i.e., the amount of work performed by parallel tasks, is a key performance attribute of parallel applications. On the one hand, fine-grained tasks (i.e., small tasks carrying out few computations) may introduce considerable parallelization overheads. On the other hand, coarse-grained tasks (i.e., large tasks performing substantial computations) may not fully utilize the...

Università della Svizzera italiana

Move people or move the plant? : Business travel and relocation choices of firms

Rossi, Federica ; Maggi, Rico (Dir.)

Thèse de doctorat : Università della Svizzera italiana, 2018 ; 2018ECO007.

This dissertation proposes three empirical essays on firms’ location-related behaviour, focusing on two strategic issues: business travel plans and relocation choices. The first chapter studies the potential impact on business travel of the future high-speed railway line project, called AlpTransit, which in the meantime links Lugano, the small economic hub of the southern part of...