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Université de Neuchâtel

Ontology engineering using formal concept analysis from unstructured textual data

Jabbari, Simin ; Stoffel, Kilian (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2019 ; 2806.

Knowledge extraction especially from unstructured data such as texts has been always considered as one of the highly demanded requests with lots of applications in almost all industries. Design and building of solutions that are capable of extracting knowledge, in an almost automated way, is not an easy task at all. Many researchers have proposed variety of methodologies and algorithms to...

Université de Neuchâtel

Isoperimetric inequalities for Laplace and Steklov problems on Riemannian manifolds

Pétiard, Luc ; Colbois, Bruno (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2019.

This thesis is about the spectra of the Laplacian and of the Dirichlet-to-Neumann operators on a compact Riemannian manifold. Both problems have physical interpretations that can be found in [Eva 1998] and [Ban 1980]. We focused on finding upper bounds for the eigenvalues, based on the geometry of the manifold. More precisely, we consider if it is possible to obtain upper bounds in which the...

Université de Neuchâtel

Les bâtisseurs de l'impermanence : de la terre ocre aux parois de bambou : articulation des savoir-faire autour de l'élaboration d'une maison temporaire en RDP Lao

Jousset, Amanda ; Geslin, Philippe (Dir.)

Mémoire de master : Université de Neuchâtel, 2014 ; 361.

L'habitation en Asie du Sud-Est, de par la variété de ses bâtiments, a été étudiée par de nombreux chercheurs et chercheuses. Toutefois, souvent, l'habitation est étudiée sous un angle qui considère cet artefact comme étant le produit de savoir-faire et d'un mode de pensée traditionnels. Or, les savoir-faire sont plus que des actes issus de la tradition et voir un artefact tel que...

Université de Neuchâtel

Action selectors without Floer-Homology

Haug, Carsten ; Schlenk, Felix (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2018.

Hamiltonian systems on symplectic manifolds tend to have many periodic orbits. The “actions” of these orbits form an invariant for the Hamiltonian system. The set of actions can be very large, however. To get useful invariants, one selects for each Hamiltonian function just one action value by some minimax procedure: A so-called action selector associates with every compactly supported...

Université de Neuchâtel

Respiratory physiology and anthropophilic behavioural traits of the main malaria vector "Anopheles gambiae" Giles (Diptera: Culicidae)

Frei, Jérôme ; Guerin, Patrick (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2018.

Anopheles gambiae Giles (An. gambiae) is the main vector of malaria. To fulfil metabolic demand An. gambiae is particularly dependent on blood feeding which is an important driving force of its strong vectorial capacity. It is therefore important to better understand how its metabolism scales with body size and, as an ectotherm, evaluate the thermal sensitivity of its...

Université de Neuchâtel

Complexity of positive contactomorphisms

Dahinden, Lucas ; Schlenk, Felix (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2018.

In this thesis we study volume growth properties of positive contactomorphisms, using Rabinowitz-Floer homology. We prove that positive dimensional growth of Rabinowitz-Floer homology implies that every positive contactomorphism has positive topological entropy. We found two instances where Rabinowitz-Floer homology has positive dimensional growth. The first instances are unit cosphere bundles of...

Consortium of Swiss Academic Libraries

Eigenvalues of the Laplacian and extrinsic geometry

Hassannezhad, Asma

In: Annals of Global Analysis and Geometry, 2013, vol. 44, no. 4, p. 517-527

Consortium of Swiss Academic Libraries

Eigenvalue control for a Finsler-Laplace operator

Barthelmé, Thomas ; Colbois, Bruno

In: Annals of Global Analysis and Geometry, 2013, vol. 44, no. 1, p. 43-72

Université de Neuchâtel

Fabrication and characterization of MEMS alkali vapor cells used in chip-scale atomic clocks and other atomic devices

Karlen, Sylvain ; Mileti, Gaetano (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2018.

Atomic clocks are timekeeping devices that can achieve extreme performance in terms of stability and accuracy. Behind this name, hides a variety of different systems which size and complexity can be considerably different depending on their applications. The primary frequency standards used for the realization of the second and the clocks mounted on the Galileo satellite positioning system are...