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Université de Lausanne

Development of a 3D very high-resolution seismic reflection system for lacustrine settings - a case study over a thrust fault zone in Lake Geneva

Scheidhauer, Maren ; Marillier, François (Dir.)

Thèse de doctorat : Université de Lausanne : 2003.

An efficient high-resolution three-dimensional (3-D) seismic reflection system for small-scale targets in lacustrine settings was developed. In Lake Geneva, near the city of Lausanne, Switzerland, past high-resolution two-dimensional (2-D) investigations revealed a complex fault zone (the Paudèze thrust zone), which was subsequently chosen for testing our system. Observed structures include a...

Université de Lausanne

Investigation phytochimique des plantes aquatiques Potamogeton pectinatus L., P. lucens L., P. perfoliatus L. et P. crispus L. (Potamogetonaceae)

Waridel, Patrice ; Hostettmann, Kurt (Dir.)

Thèse de doctorat : Université de Lausanne : 2003.

Dans le cadre de la recherche de nouveaux composés naturels, les métabolites secondaires de plantes aquatiques indigènes, les potamots Potamogeton pectinatus L., P. lucens L., P. perfoliatus L. et P. crispus L. (Potamogetonaceae), ont été étudiés. Par leur position écologique et évolutive particulière entre environnement terrestre et aquatique, les plantes aquatiques ou macrophytes...

Université de Lausanne

Study of biomacromolecule conformational changes by Scanning Force Microscopy

Valle, Francesco ; Dietler, Giovanni (Dir.)

Thèse de doctorat : Université de Lausanne : 2003.

The aim of the present thesis work is to study the conformational changes of biomacromolecules at the single molecule level. To that end, Atomic Force Microcopy (AFM) imaging was performed on proteins and nucleic acids adsorbed onto a surface. In this microcopy technique a very sharp tip attached at the end of a soft cantilever is scanned over a surface, the interaction of the tip with the...

Université de Lausanne

Bunch frequency multiplication by RF injection into an isochronous ring

Royer, Philippe ; Schneider, Olivier (Dir.)

Thèse de doctorat : Université de Lausanne : 2003.

The Compact LInear Collider (CLIC) collaboration studies the possibility of building a multi-TeV (3 TeV centre-of-mass), high-luminosity (1034 cm-2s-1) electron-positron collider for particle physics. The CLIC scheme is based on high-frequency (30 GHz) linear accelerators powered by a low-energy, high-intensity drive beam running parallel to the main linear accelerators (Two-Beam Acceleration...

Université de Lausanne

Tectonic and metamorphic evolution of the Central Himalayan Domain in Southeast Zanskar (Kashmir, India)

Dèzes, Pierre ; Steck, Albrecht (Dir.)

Thèse de doctorat : Université de Lausanne : 1999.

The southeastern part of Zanskar is located at the transition between two major Himalayan domains of contrasting metamorphic grade, the High Himalayan Crystalline Sequence (HHCS) and the Tethyan Himalaya (TH). The transition between the TH and the HHCS is marked by a very rapid, although perfectly gradual, decrease in metamorphic grade, which coincides with a major tectonic structure, the Zanskar...

Université de Lausanne

BoBo mixing meseasurement at Belle using dilepton events tagged with a soft pion

Ronga, Frédéric ; Schneider, Olivier (Dir.)

Thèse de doctorat : Université de Lausanne : 2003.

The Belle experiment is located in the KEK research centre (Japan) and is primarily devoted to the study of CP violation in the B meson sector. Belle is placed on the KEKB collider, one of the two currently running “B-meson factories”, which produce Banti-B pairs. KEKB has created more than 150 million pairs in total, a world record for this kind of colliders. This large sample allows very...

Université de Lausanne

Cryo-negative staining: advantages and applications for three-dimensional electron microscopy of biological macromolecules

De Carlo, Sacha ; Dubochet, Jacques (Dir.)

Thèse de doctorat : Université de Lausanne : 2002.

Many biological specimens do not arrange themselves in ordered assemblies (tubular or flat 2D crystals) suitable for electron crystallography, nor in perfectly ordered 3D crystals for X-ray diffraction; many other are simply too large to be approached by NMR spectroscopy. Therefore, single-particles analysis has become a progressively more important technique for structural determination of large...