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Université de Neuchâtel

Microfluidic devices for heterogeneous assays

Dodge, Arash ; De Rooij, Nicolas F (Dir.)

Thèse de doctorat : Université de Neuchâtel : 2003 ; 1701.

Microfluidics is a rec

Université de Neuchâtel

Diffractive and refractive lenses for hard x-rays with ultra-high efficiencies

Nöhammer, Bernd ; Herzig, Hans-Peter (Dir.)

Thèse de doctorat : Université de Neuchâtel : 2004 ; 1748.

Focusing of x-rays is an essential pre-requisite for many synchrotron based measurement techniques. In this work, multi-level silicon zone plates and planar refractive lenses made from diamond and silicon have been developed, aiming for focusing applications in the hard x-ray range, i.e. for photon energies between 10 and 50 keV. The first part of the work deals with diffractive x-ray lenses...

Université de Neuchâtel

Resonant grating filters for microsystems

Niederer, Guido ; Herzig, Hans-Peter (Dir.)

Thèse de doctorat : Université de Neuchâtel : 2004 ; 1745.

In the present work we report on the design and characterization of a tunable optical filter for use in a compact add-drop multiplexer. The optical filter is a resonant grating filter (RGF) consisting of a planar waveguide and a grating parallel to the surface. A resonance occurs when the incoming light is diffracted by the grating and matches a mode in the waveguide. Numerous aspects of the...

Université de Neuchâtel

A novel microfluidic concept for bioanalysis using controlled recirculating flows

Lettieri, Gian-Luca ; De Rooij, Nicolas F (Dir.)

Thèse de doctorat : Université de Neuchâtel : 2003 ; 1734.

Le sujet de cette thèse concerne l'étude de micro-flux recircultatoire ou micro-vortex contrôlés générés sur dans des microsystèmes destinés à des applications bio analytiques. Ce travail à visé prioritairement fondamentale sur la formation des micro-vortex contrôlés a permis de développer un outil unique, flexible et alternatif aux méthodes d'analyses chimique et biologique...

Université de Neuchâtel

Development of microfluidic devices for chemical analysis and fluid handling

Egidi, Giovanni ; De Rooij, Nicolas F (Dir.)

Thèse de doctorat : Université de Neuchâtel : 2004 ; 1743.

Miniaturization of chemical analysis and synthesis systems improve throughput, performance and accessibility, and lead to significantly reduced costs. In this work are described several components that find place in the process of miniaturization. This work is developed in the frame of the project CREAM (Cartridges with molecularly imprinted Recognition Elements for Antibiotic residues Monitoring...

Université de Neuchâtel

Polarization Optics of Periodic Media

Bohley, Christian ; Dändliker, René (Dir.)

Thèse de doctorat : Université de Neuchâtel : 2004 ; 1749.

The thesis describes different approaches for the simulation of light propagation in anisotropic media. It will focus, especially, on polarization effects in anisotropic media with periodic structure. The work gives shortly a theoretical background with some essential considerations for polarization optics. This includes Maxwell's equations, the explanation of matrix concepts for optical elements...

Université de Neuchâtel

Dynamic Load Balancing in Heterogeneous Distributed Environments

Rotaru, Tiberiu ; Nägeli, Hans-Heinrich (Dir.)

Thèse de doctorat : Université de Neuchâtel : 2003 ; 1689.

Les systèmes distribués apparaissent de plus en plus comme des plates-formes viables pour le calcul à haute performance. L'existence des librairies standard pour la programmation parallèle facilite l'utilisation de telles plates-formes pour exécuter des applications complexes dans divers domaines de la science et la technique. Cependant, par rapport aux systèmes homogènes, un certain...

Université de Neuchâtel

Numerical methods for estimating linear econometric models

Foschi, Paolo ; Nägeli, Hans-Heinrich (Dir.) ; Kontoghiorghes, Erricos John (Codir.)

Thèse de doctorat : Université de Neuchâtel : 2003 ; 1746.

The estimation of the Seemingly Unrelated Regressions (SUR) model and its variants is a core area of econometrics. The purpose of this thesis is the investigation and development of efficient numerical and computational methods for solving large-scale SUR models. Specifically, its aim is twofold: firstly to continue past successful research into the design of numerically efficient methods for...

Université de Neuchâtel

Algorithms for solving statistical model selection problems

Gatu, Cristian ; Erard, Pierre-Jean (Dir.) ; Kontoghiorghes, Erricos John (Codir.)

Thèse de doctorat : Université de Neuchâtel : 2004 ; 1744.

Statistical model selection problems arises in diverse areas. Some of the selection methods have exponential complexities and thus, are computationally demanding. The purpose of this thesis is to propose computationally efficient and numerical reliable algorithms used in statistical model selection. Particular emphasis is given to the computationally intensive model selection strategies which...

Université de Lausanne

Development of a hepatocyte hollow fiber bioreactor for the study of contrast agents by magnetic resonance imaging

Planchamp Messeiller, Corinne ; Testa, Bernard (Dir.)

Thèse de doctorat : Université de Lausanne : 2002.

Thanks to the continuous progress made in recent years, medical imaging has become an important tool in the diagnosis of various pathologies. In particular, magnetic resonance imaging (MRI) permits to obtain images with a remarkably high resolution without the use of ionizing radiation and is consequently widely applied for a broad range of conditions in all parts of the body. Contrast agents are...