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Université de Neuchâtel

Recherche d'information plurilingue

Abdou, Samir ; Savoy, Jacques (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2007 ; Th.1972.

Dans cette thèse, nous présentons nos investigations en recherche d’information selon deux contextes. Premièrement, nous nous sommes intéressés à l’aspect plurilingue de la Toile en abordant le développement de moteurs de recherche pour des langues présentant des caractéristiques visuelles, morphologiques et syntaxiques très différentes des langues indo-européennes. Plus...

Université de Neuchâtel

Use of stable isotopoe analyses to assess natural attenuation of chlorinated ethenes in groundwater

Abe, Yumiko ; Hunkeler, Daniel (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2007 ; Th.1970.

Chlorinated ethenes are among the most frequently detected groundwater contaminants in industrially developed countries. Although their degradation pathways have been understood, assessing the progress of natural attenuation of chlorinated ethenes still remains a challenge. This thesis explored the possibilities and limits of the use of compound-specific stable isotope analysis as a field...

Université de Neuchâtel

Measurement of the linewidth enhancement factor of singlemode room temperature continuous wave quantum cascade lasers

Aellen, Thierry ; Aebi, Philipp (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2008.

The invention of the laser source in 1960 has led to a wide range of applications showing a widespread impact in every aspect of our today life, including for example hospital, factory or simply at home. In particular, recent developments originating from the compact, highly efficient and common semiconductor lasers that are simply supplied by an electrical current. The diode coherent light...

Université de Neuchâtel

Apertureless Scanning near-Field Optical Microscope Probe for Transmission Mode Operation

Aeschimann, Laure ; Stauffer, Urs (Dir.)

Thèse de doctorat : Université de Neuchâtel : 2004 ; 1765.

In addition to providing optical imaging at the subwavelength scale with high resolution topography, a main ad-vantage of scanning near-field optical microscopy (SNOM) is its capability to benefit from the various contrast mechanisms of conventional optical microscopy. However, broad application of SNOM suffers from the difficulty of producing inexpensive probes of high reproducible quality. The...

Université de Neuchâtel

Quantum cascade lasers at terahertz frequencies

Ajili, Lassaad ; Faist, Jérôme (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2007 ; 1941.

The thesis which I have pleasure to present you is the fruit of the research work during four years in the laboratory of mesoscopic physic located at the institute of physics of Neuchâtel. The extraordinary progress realized at the end of the seventy years, in the control of the growth, atomic layer by atomic layer, of semiconductor heterostructures have developed a true quantum engineering of...

Université de Neuchâtel

Multilingual and domain-specific IR : a case study in cultural heritage

Akasereh, Mitra ; Savoy, Jacques (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2015.

Nowadays we can find data collections in many different languages and in different fields. So we are facing with a rising need for search systems handling multilinguality as well as professional search systems which allow their users to search in a specific field of knowledge. In this thesis we propose a search system for data on cultural heritage. Our data comes from different resources...

Université de Neuchâtel

A knowledge extraction framework for crime analysis : unsupervised methods in uncertain environments

Albertetti, Fabrizio ; Stoffel, Kilian (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2015 ; 2514.

This doctoral thesis investigates the role of knowledge extraction methods in the analysis of crime as an interdisciplinary project, with a focus on unsupervised methods dealing with the uncertain aspects that are intrinsic to the crime environment. In a context where data generated from criminal activities are increasingly available due to the evolution of technology, the use of...

Université de Neuchâtel

Fungal biogenic patina : optimization of an innovative conservation treatment for copper-based artefacts

Albini, Monica ; Joseph, Edith (Dir.) ; Junier, Pilar (Codir.)

Thèse de doctorat : Université de Neuchâtel, 2017.

Microorganisms are often considered harmful for cultural heritage. However, they can also be used for its safeguarding. Indeed, some fungal species are known for their ability to produce oxalic acid in order to immobilize of toxic heavy metals and, therefore, detoxify their environmental. Biotechnology already exploited this ability to immobilize heavy metals in the field of waste treatment...

Université de Neuchâtel

Aspects of the synthesis and characterization of diamond and diamond like carbon films

Alers, Paul ; De Rooij, Nicolaas-F. (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2007 ; Th. 1952.

The present thesis is the result of 15 years of continues efforts. The research work started in 1991 and has been completed by a final publication in 2005. The content of the thesis is composed of introductory parts (giving the reader an introduction into the later to be discussed subject) and articles published by the author. At this point the author would like to draw the attention to the fact...