Thèse de doctorat : Université de Fribourg, 2010.
Personal Information (PI) refers to digital information owned by an individual and placed under their direct control. Personal Information Management (PIM) describes the processes involved in the acquisition, organization and retrieval of personal information. PIM involves a range of different tasks done by the user, most of which are performed to facilitate the re-finding of needed information....
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Thèse de doctorat : Université de Fribourg, 2008 ; Nr. 1603.
The distributive law known from arithmetics is one of the best tools for a computer scientist to grapple with the intractable nature of many applications. So, efficient algorithms have been developed for the computation of Fourier and Hadamard transforms, Bayesian networks, database queries, decoding problems and many more. The fact that they all benefit from the same technique suggests that a...
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Thèse de doctorat : Université de Fribourg, 2008 ; Nr. 1613.
This thesis describes general concepts of network management and the prototype implementation of a network management system software. The aim of the project Verinec (Verified Network Configuration) is to improve security and reliability in large, heterogeneous networks, while at the same time facilitate their administration. Using a centralised database of the entire network and services...
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In: Journal of Materials Science, 2010, vol. 45, no. 1, p. 1-33
This paper provides an overview of recent progress made in the area of cellulose nanofibre-based nanocomposites. An introduction into the methods used to isolate cellulose nanofibres (nanowhiskers, nanofibrils) is given, with details of their structure. Following this, the article is split into sections dealing with processing and characterisation of cellulose nanocomposites and new developments...
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In: Archaeometry, 2009, vol. 51, no. 5, p. 791-807
Three types of antimony-based, opaque ceramic colours were used in the faience workshop of Le Bois d'Épense during the first decades of the 19th century; that is, yellow, tawny and green. Yellow is generated by lead antimonate crystals (Naples Yellow), which are incorporated into an uncoloured glass matrix. According to SEM–EDS measurements, these pigments contain iron. The tawny colour is the...
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In: ISESCO Science and Technology Vision, 2007, vol. 3, no. 3, p. 49-53
Urban areas are characterised by a high concentration of economic and social activities. As a consequence, residential, commercial or industrial activities require an enormous rate of resources consumption. This can lead to environmentally-related problems. In addition, to the depletion of fossil ressources in the near future, there are legitimate calls for innovative approaches towards more...
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In: Proceedings, 11th Int'l Conf. on Computing in Civil and Building Engineering, 14-16 juin 2006, Montreal, Canada, 2006, p. 1-9
SYGEME: INTEGRATED MUNICIPAL MANAGEMENT FOR WATER RESSOURCES 1) AIM. - To offer management and monitoring tools for urban networks (water, energy, communication, transport). 2) OBJECTIVE. - To develop an Internet platform designed for the management of the complete water cycle of a municipality (drinking and waste water) 3) TARGET. Political and technical leaders of public collectivities...
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In this paper, the system is viewed as a construction based on the actors’ cognitive and social interactions. The system is the result of multiple – actor sense making (Weick 1995), but at the same time it orients social sense making. In this process each actor’s point of view is a representation of both the system and the context perceived as pertinent by the actor. In other words, the...
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Thèse de doctorat : Université de Fribourg : 2001 ; 1340.
Uncertain knowledge can be represented in the framework of argumentation systems. In this framework, uncertainty is expressed using so-called assumptions. Depending on the setting of the assumptions, a given hypothesis of interest can be proved or falsified. The main goal of assumption-based reasoning is to determine the set of all supporting arguments for a given hypothesis. Such a supporting...
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Thèse de doctorat : Université de Fribourg : 2000 ; no 1312.
This thesis addresses the question of content-based image retrieval (CBIR) in heterogeneous databases. In an analysis of the existing CBIR tools that was done at the beginning of this work, we have shown that there was room for improvement in three key areas: query form, image and query representation, and computation of similarity. This analysis led us to studying the usability of a method for...
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