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See detailExtracting explicit and implicit causal relations from sparse, domain-specific texts
Ittoo, Ashwin ULg; Bouma, Gosse

in Lecture Notes in Computer Science (2011)

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See detailExtracting high resolution records of deformation from well-imaged sections
Suppe, J; Gonzalez-Mieres, R; Hubert, Aurelia ULg

in Abstracts with Programs - Geological Society of America (2006, October), 38(7), 132

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See detailExtracting Intra-Domain Topology from mrinfo Probing
Pansiot, Jean-Jacques; Mérindol, Pascal; Donnet, Benoît ULg et al

in 11th international Conference on Passive and active Measurement (2010, April)

Activeandpassivemeasurementsfortopologydiscoveryhave known an impressive growth during the last decade. If a lot of work has been done regarding inter-domain topology discovery and modeling, only a few ... [more ▼]

Activeandpassivemeasurementsfortopologydiscoveryhave known an impressive growth during the last decade. If a lot of work has been done regarding inter-domain topology discovery and modeling, only a few papers raise the question of how to extract intra-domain topologies from measurements results. In this paper, based on a large dataset collected with mrinfo, a multicast tool that silently discovers all interfaces of a router, we provide a mechanism for retrieving intra-domain topologies. The main challenge is to assign an AS number to a border router whose IP addresses are not mapped to the same AS. Our algorithm is based on probabilistic and empirical IP allocation rules. The goal of our pool of rules is to converge to a consistent router to AS mapping. We show that our router-to-AS algorithm results in a mapping in more than 99% of the cases. Furthermore, with mrinfo, point-to-point links between routers can be distinguished from multiple links attached to a switch, providing an accurate view of the collected topologies. Finally, we provide a set of large intra-domain topologies in various formats. [less ▲]

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See detailExtracting Meronymy Relationships from Domain-Specific, Textual Corporate Databases
Ittoo, Ashwin ULg; Bouma, Gosse; Maruster, Laura et al

in Lecture Notes in Computer Science (2010)

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See detailExtracting oscillating components from nonstationary time series: A wavelet-induced method
Deliège, Adrien ULg

E-print/Working paper (2017)

This paper consists in the description and application of a new method named Wavelet-Induced Mode Extraction (WIME) in the context of time-frequency analysis. WIME aims to extract the oscillating ... [more ▼]

This paper consists in the description and application of a new method named Wavelet-Induced Mode Extraction (WIME) in the context of time-frequency analysis. WIME aims to extract the oscillating components that build amplitude modulated-frequency modulated signals. The essence of this technique relies on the successive extractions of the dominant ridges of wavelet-based timefrequency representations of the signal under consideration. Our tests on simulated examples indicate strong decomposition and reconstruction skills, trouble-free handling of crossing trajectories in the time-frequency plane, sharp performances in frequency detection in the case of mode-mixing problems and a natural tolerance to noise. These results are compared with those obtained with the Empirical Mode Decomposition. We also show that WIME still gives meaningful results with real-life data, namely the Oceanic Niño Index. [less ▲]

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See detailExtracting residues from stone tools for optical analysis: towards an experiment-based protocol
Cnuts, Dries ULg; Rots, Veerle ULg

in Archaeological and Anthropological sciences (2017)

The identification of residues is traditionally based on the distinctive morphologies of the residue fragments by means of light microscopy. Most residue fragments are amorphous, in the sense that they ... [more ▼]

The identification of residues is traditionally based on the distinctive morphologies of the residue fragments by means of light microscopy. Most residue fragments are amorphous, in the sense that they lack distinguishing shapes or easily visible structures under reflected light microscopy. Amorphous residues can only be identified by using transmitted light microscopy, which requires the extraction of residues from the tool’s surface. Residues are usually extracted with a pipette or an ultrasonic bath in combination with distilled water. However, a number of researchers avoid residue extraction because it is unclear whether current extraction techniques are representative for the use-related residue that adheres to a flaked stone tool. In this paper, we aim at resolving these methodological uncertainties by critically evaluating current extraction methodologies. Attention is focused on the variation in residue types, their causes of deposition and their adhesion and on the most successful technique for extracting a range of residue types from the stone tool surface. Based on an experimental reference sample in flint, we argue that a stepwise extraction protocol is most successful in providing rep- resentative residue extractions and in preventing damage, destruction or loss of residue. [less ▲]

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See detailExtraction abrégée de la racine carrée
Catalan, Eugène ULg

in Nouvelles Annales de Mathématiques : Journal des Candidats aux Ecoles Polytechnique et Normale (1858), 17

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See detailExtraction and characterisation of a dietary fibre concentrate from date pulp
Roiseux, O.; Blecker, Christophe ULg; Besbes, S. et al

Poster (2006, June)

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See detailExtraction and Clean-Up of Milk Samples for PCDD/Fs and cPCBs Analysis
Focant, Jean-François ULg; De Pauw, Edwin ULg

in Organohalogen Compounds (2001), 50

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See detailExtraction and fractionation of cytotoxic metabolites from Galanthus lagodechianus Kem.-Nath
Jokhadze, Malkhaz; Kutchukhidze, J.; Murtazashvilia, T. et al

in Allergology and Immunology (Moscou) (2006), 7

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See detailExtraction and partial purification of tomato leaves hydroperoxide lyase
Fauconnier, Marie-Laure ULg; Lecoq, S.; Marlier, M.

Poster (1995, September 27)

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See detailExtraction by three processes of arabinoxylans from wheat bran and characterization of the fractions obtained
Aguedo, Mario ULg; Fougnies, Christian; DERMIENCE, Michael ULg et al

in Carbohydrate Polymers (2014), 105

Arabinoxylans (AXs) were extracted from destarched wheat bran (DWB) according to different processes, with a view to their production at industrial scale. Two fractions (F3a and F3b, respectively purified ... [more ▼]

Arabinoxylans (AXs) were extracted from destarched wheat bran (DWB) according to different processes, with a view to their production at industrial scale. Two fractions (F3a and F3b, respectively purified on 10 kDa and 100 kDa ultrafiltration membranes) were obtained with low yields by treating DWB with an endoxylanase and this process left a solid residue exhausted in enzyme-extractable AXs (EDWB). F1 and F2 AX fractions were obtained by treatment with sodium hydroxide of respectively DWB and EDWB. The fraction F4 resulted from a hydrothermal treatment of EDWB in a pressure reactor, followed by ethanol precipitation. The different AX fractions were characterized and compared for the composition in monosaccharides, for the contents in fats and in ferulic, phytic and uronic acids, for the molecular mass distribution and the degrees of methylation and acetylation. The alkaline extractions gave one desesterified AX population with molecular mass (MM) higher than 670 kDa and arabinose/xylose ratios (Ara/Xyl) around 1. The enzyme and thermal treatments yielded AXs with two main populations in size-exclusion chromatography (the largest one at 5-12.5 kDa and a second one at 140-160 kDa), having overall Ara/Xyl of respectively 0.7 and 0.5 for both processes. These data bring information about the influence of the process on the characteristics of AX fractions obtained from pretreated wheat bran. Here are also reported processes that enabled to recover enzyme-unextractable AXs from DWB, including an original and up-scalable hydrothermal extraction. Phytate contents of isolated AXs are described for the first time. [less ▲]

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See detailExtraction conditions can greatly influence antioxidant capacity assays in plant food matrices
Michiels, Jean-Albert ULg; Kevers, Claire ULg; Pincemail, Joël ULg et al

in Food Chemistry (2012), 130

The estimated antioxidant capacity of different matrices can vary considerably between research reports. Besides intrinsic factors (not studied here), our work showed that may have various causes. Firstly ... [more ▼]

The estimated antioxidant capacity of different matrices can vary considerably between research reports. Besides intrinsic factors (not studied here), our work showed that may have various causes. Firstly, different methods are used to measure antioxidant capacity. Secondly, the results obtained for a single matrix by one method (such as ORAC) can vary with the extraction conditions. Parameters having a great impact on the amount and composition of antioxidants in extracts, and thus on the measured antioxidant capacity, notably include the extraction solvent composition, temperature, extraction time (duration), solvent-to-solid ratio, and storage conditions. Standardization of the extraction procedure is thus necessary for accurate and reproducible determination of the antioxidant capacity and phenolics in different food matrices by different laboratories. In this study we optimised such a procedure for four fresh plant matrices (orange, apple, leek, and broccoli). The optimised procedure requires extraction in a mixture of acetone/water/acetic acid (70/28/2, v/v/v) for 1 h at 4°C, with a solvent-to-solid ratio of 20 mL per 1 g. Fresh material should be used, but if this is not possible, one may lyophilise the plant matrices or store the extracts for a few days at -20°C before analysis. [less ▲]

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See detailExtraction d'un modèle numérique de terrain au départ d'images stéréoscopiques SPOT sur le bassin versant de l'Oued Tasrafete
Tahiri, Driss; Binard, Marc ULg; Donnay, Jean-Paul ULg

in Géo Observateur (1992, October)

Cette communication présente les résultats de la reconstitution automatique du relief à partir de deux scènes SPOT couvrant une zone montagneuse du nord du Maroc. Le système utilisé (module Digital Ortho ... [more ▼]

Cette communication présente les résultats de la reconstitution automatique du relief à partir de deux scènes SPOT couvrant une zone montagneuse du nord du Maroc. Le système utilisé (module Digital Ortho de ERDAS) s'appuie sur le principe de la corrélation automatique qui, pour la recherche des points homologues, fonctionne hiérarchiquement à plusieurs niveaux de résolution. L'évaluation de la précision du MNT obtenu a été réalisée à l'aide de données altimétriques extraites des cartes topographiques existantes (échelle: 1/50 000) et a révélé une erreur moyenne quadratique de ±15 m. Cette précision est suffisante pour rétablissement d'orthoimages ou pour l'interpolation des courbes de niveau pour des cartes topographiques aux échelles 1/100 000 et plus petites. [less ▲]

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See detailExtraction d'une canine chez un ours polaire
DUFOUR, Pascale ULg; Balligand, Marc ULg; Pypendop, B. et al

in Annales de Médecine Vétérinaire (1995)

Detailed reference viewed: 19 (5 ULg)