2,181 research outputs found
Bayesian data fusion in environmental sciences : theory and applications
No full textDuring the last thirty years, new technologies have contributed to a drastic increase of the amount of data in environmental sciences. Monitoring networks, remote sensors, archived maps and large databases are just few examples of the possible information sources responsible for this growing amount of information. For obvious reasons, it might be interesting to account for all these information when dealing with a space-time prediction/estimation context. In environmental sciences, measurements are very often sampled scarcely over space and time. Geostatistics is the field that investigates variables in a space-time context. It includes a large number of methods and approaches that all aim at providing space-time predictions (or interpolations) for variables scarcely known in space and in time by accounting for space-time dependance between these variables. As a consequence, geostatistics methods are relevant when dealing with the processing and the analysis of environmental variables in which space and time play an important role. As direct consequence of the increasing amount of data, there is an important diversity in the information (e.g. different nature, different uncertainty). These issues have recently motivated the emergence of the concept of data fusion. Broadly speaking, the main objective of data fusion methods is to deal with various information sources in such a way that the final result is a single prediction that accounts for all the sources at once. This enables thus to conciliate several and potentially contradictory sources instead of having to select only one of them because of a lack of appropriate methodology. For most of existing geostatistics methods, it is quite difficult to account for a potentially large number of different information sources at once. As a consequence, one has often to opt for only one information source among all the available sources. This of course leads to a dramatic loss of information. In order to avoid such choices, it is thus relevant to get together the concepts of both data fusion and geostatistics in the context of environmental sciences. The objectives of this thesis are (i) to develop the theory of a Bayesian data fusion (BDF) framework in a space-time prediction context and (ii) to illustrate how the proposed BDF framework can account for a diversity of information sources in a space-time context. The method will thus be applied to a few environmental sciences applications for which (i) crucial available information sources are typically difficult to account for or (ii) the number of secondary information sources is a limitation when using existing methods. Reproduced by permission of Springer. P. Bogaert and D. Fasbender (2007). Bayesian data fusion in a spatial prediction context: a general formulation. Stoch. Env. Res. Risk. A., vol. 21, 695-709. (Chap. 1). © 2008 IEEE. Reprinted, with permission, from D. Fasbender, J. Radoux and P. Bogaert (2008). Bayesian data fusion for adaptable image pansharpening. IEEE Trans. Geosci. Rem. Sens., vol. 46, 1847-1857. (Chap. 3). © 2008 IEEE. Reprinted, with permission, from D. Fasbender, D. Tuia, P. Bogaert and M. Kanevski (2008). Support-based implementation of Bayesian data fusion for spatial enhancement: applications to ASTER thermal images. IEEE Geosci. Rem. Sens. Letters, vol. 6, 598-602. (Chap. 4). Reproduced by permission of American Geophysical Union. D. Fasbender, L. Peeters, P. Bogaert and A. Dassargues (2008). Bayesian data fusion applied to water table spatial mapping. Accepted for publication in Water Resour. Res. (Chap. 5)(AGRO 3) -- UCL, 200
Bayesian Data Fusion for water table interpolation: incorporating a hydrogeological conceptual model in kriging
No full textpeer reviewedThe creation of a contour map of the water table in an unconfined aquifer based on head measurements is often the first step in any hydrogeological study. Geostatistical interpolation methods (e.g. kriging) may provide exact interpolated groundwater levels at the measurement locations, but often fail to represent the hydrogeological flow system. A physically based, numerical groundwater model with spatially variable parameters and inputs is more adequate in representing a flow system. Due to the difficulty in parameterization and solving the inverse problem however, an often considerable difference between calculated and observed heads will remain.
In this study the water table interpolation methodology presented by Fasbender et al. (2008), in which the results of a kriging interpolation are combined with information from a drainage network and a Digital Elevation Model (DEM), using the Bayesian Data Fusion framework (Bogaert and Fasbender, 2007), is extended to incorporate information from a tuned analytic element groundwater model. The resulting interpolation is exact at the measurement locations while the shape of the head contours is in accordance with the conceptual information incorporated in the groundwater flow model.
The Bayesian Data Fusion methodology is applied to a regional, unconfined aquifer in Central Belgium. A cross-validation procedure shows that the predictive capability of the interpolation at unmeasured locations benefits from the Bayesian Data Fusion of the three data sources (kriging, DEM and groundwater model), compared to the individual data sources or any combination of two data sources
On Pina Bausch’s Legacy: an interview with Dominique Mercy
No full textPerhaps no other author has better characterized the work of Pina’s
dancers – and, therefore, the artist’s herself – than José Sasportes – a
remarkable Portuguese dance critic and historian. This brief observation of
Sasportes, made in a text entitled Acção para bailarinos [Action for dancers],
and regarding an event held in Lisbon in honor to Pina Bausch, allows to perceive in quite clearly the meaning of the experience and legacy of a remarkable artist, that are summarized in the figure of one of her greatest collaborators, Dominique Mercy.
Certainly, there is no need to introduce Dominique. It is worthy,
though, to recover some moments that preceded his fortuitous encounter with Pina in the early 1970’s in Saratoga, United States. Born in 1950 in the city of Mauzac, France, Dominique’s first professional steps in the dance world from the mid-1960’s on were in the Bordeaux Grand Théâtre,
later followed by the Amiens Ballet du Art Contemporain. In 1973, two
years after his first encounter with Pina in the Summer Festival of Saratoga,
in 1971, Dominique goes to Germany, to Wuppertal, to be part of the
recently founded Tanztheater.
His close relationship with Pina allowed, in fact, that her legacy could
be kept alive following her sudden death in 2009. Dominique took over the
artistic direction of the Company with Robert Sturm for some of the
following years, having later transferred the position to his co-worker and
dancer Lutz Forster. It was beside Pina and so many others from the
Wuppertal ensemble that Dominique ended up writing one of the major
pages in the annals of dance history in the 20th century.
The experience of – or rather, with – Pina that each one of us
apparently has with her when meeting her work for the first time, allowing
to understand in a certain extent the fascination that she exerts until
nowadays on the audience, passes as well and indispensably through those
who worked with her and by her means. My first time with Pina was, for
sure, beside Dominique Mercy, or rather, in front of him. Dominique was
half-naked, wearing only a tutu and carrying a watering can. It was 2006,
for the presentation of Fur die kinder von gestern, heunte und morgen, in
Porto Alegre. Pina was also there.
The unusual encounter – even though separated by the proscenium
arch – would happen again years later in Paris. However, this time, in
2011, without Pina and with no line dividing us. I was introduced to
Dominique following one of the presentations of Como el musguito em la
piedra..., by the also Tanztheater Wuppertal dancer Daphnis Kokkinos. On
that occasion, Dominique had an extremely light and welcoming attitude.
Over the years, I noticed that it was not a protocol way of introduction, but
Dominique Mercy; Marcelo de Andrade Pereira – On Pina
Bausch’s Legacy: an interview with Dominique Mercy
the very donation of part of what he was, how he was, not in a way, but in
his way, with or without tutu. In January 2018, when recollecting that
encounter with Dominique in his house in Barmen, Wuppertal, he did not
remember it. And he certainly could not, as I, absorbed in my amazement,
had articulated little – or nothing – at that moment. However, even in my
involuntary contemplation, something had been given to me, a long-lasting
presence.
It was according to Dominique’s generous, honest and delicate way
that this interview actually happened. I thank him for the attention and for
the coffee. I also thank my dear friend Eddie Martinez, who made this and
so many other happy encounters possible to me
Rural Communities
No full textRecords describing life and organization in rural communities, particularly how the national government maintains relations with these villages.Royal Lao Government. "Rural Communities, Cantons or Tassengs, Villages or Bans" Excerpted from "Administrative Organization of Laos" by Dominique Guerrini, UN Expert in Public Administration, circa 196
What Transition to Teach? Interview with Dominique Bourg
No full textInternational audienceDominique Bourg is a philosopher and honorary professor at the University of Lausanne (UNIL). He is the editor of the online journal lapenséeécologique.com and the author of several books about ecology, democracy and the impact of the market. In this interview he first talks about the initiatives, in teaching but also in university management, he is involved in, mainly in Lausanne. With regards to teaching, he shares his thoughts on how to introduce courses and he argues for a multidisciplinary and transdisciplinary approach of teaching ecological issues, combining the perspective of social sciences with sound scientific knowledge and eco-psychological support. The interview then adopts a broader angle by mentioning obstacles to the « transition », the need to change institutions at different scales, with taking into account long term issues in public decision-making and defining a common baseline for democracy. Finally Dominique Bourg explains which levers he considers most important on the local, national and international scale
Histoire de la Deuxième Guerre Mondiale (1992-1997) (08). Conférence de presse Jean Moulin - face A
No full textSéminaire organisé et enregistré par l'IHTP (Paris), entre 1992 et 1997 ; sous la direction de Jean-Pierre Azéma et Dominique Veillon. Conférence de presse Jean Moulin
Histoire de la Deuxième Guerre Mondiale (1992-1997) (12) - face B
No full textSéminaire organisé et enregistré par l'IHTP (Paris), entre 1992 et 1997 ; sous la direction de Jean-Pierre Azéma et Dominique Veillon. Raymond Aubrac, "Jours du siècle"/France Inter
Information: The Key to Succeeding in Entrepreneurship
No full textAuthor\u27s biography: Dominique Halaby is the director of the Bureau of Business Research and Economic Development at Georgia Southern University. He can be reached at [email protected]
Histoire de la Deuxième Guerre Mondiale (1992-1997) (16). L'après-guerre des femmes : Simone Veil, Micheline Paquet-Durand, Odette Marchelidon, Gilberte Brossolette (2)
No full textSéminaire organisé et enregistré par l'IHTP (Paris), entre 1992 et 1997 ; sous la direction de Jean-Pierre Azéma et Dominique Veillon
Histoire de la Deuxième Guerre Mondiale (1992-1997) (18). Le fichier juif (2)
No full textSéminaire organisé et enregistré par l'IHTP (Paris), entre 1992 et 1997 ; sous la direction de Jean-Pierre Azéma et Dominique Veillon
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