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See detailLaBGen: A method based on motion detection for generating the background of a scene
Laugraud, Benjamin ULg; Pierard, Sébastien ULg; Van Droogenbroeck, Marc ULg

in Pattern Recognition Letters (in press)

Given a video sequence acquired with a fixed camera, the generation of the stationary background of the scene is a challenging problem which aims at computing a reference image for a motionless background ... [more ▼]

Given a video sequence acquired with a fixed camera, the generation of the stationary background of the scene is a challenging problem which aims at computing a reference image for a motionless background. For that purpose, we developed our method named LaBGen, which emerged as the best one during the Scene Background Modeling and Initialization (SBMI) workshop organized in 2015, and the IEEE Scene Background Modeling Contest (SBMC) organized in 2016. LaBGen combines a pixel-wise temporal median filter and a patch selection mechanism based on motion detection. To detect motion, a background subtraction algorithm decides, for each frame, which pixels belong to the background. In this paper, we describe the LaBGen method extensively, evaluate it on the SBI 2016 dataset and compare its performance with other background generation methods. We also study its computational complexity, the performance sensitivity with respect to its parameters, and the stability of the predicted background image over time with respect to the chosen background subtraction algorithm. We provide an open source C++ implementation at http://www.telecom.ulg.ac.be/labgen. [less ▲]

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See detailIdentifying Semitic loanwords in Late Egyptian
Winand, Jean ULg

in Dils, Peter; Grossman, Eitan; Richter, Sebastian (Eds.) et al Language Contact and Bilingualism in antiquity: What Linguistic Borrowing into Coptic can tell us about it (in press)

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See detailLe vocabulaire du traitement attesté dans les lettres privées grecques de l’Égypte gréco-romaine et byzantine
Ricciardetto, Antonio ULg

in Le traitement : de la notion physique à ses représentations métaphoriques dans l'Antiquité gréco-romaine classique et tardive. Actes de la Journée d'étude internationale (in press)

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See detailDetection, isolation and characterization of Fusobacterium gastrosuis sp. nov. colonizing the stomach of pigs
De Witte, C.; Flahou, B.; Ducatelle, R. et al

in Systematic & Applied Microbiology (in press)

Nine strains of a novel Fusobacterium sp. were isolated from the stomach of 6-8 months old and adult pigs. The isolates were obligately anaerobic, although they endured 2 hours exposure to air ... [more ▼]

Nine strains of a novel Fusobacterium sp. were isolated from the stomach of 6-8 months old and adult pigs. The isolates were obligately anaerobic, although they endured 2 hours exposure to air. Phylogenetic analysis based on 16S rRNA and gyrase B genes demonstrated that the isolates showed high sequence similarity with Fusobacterium mortiferum, Fusobacterium ulcerans, Fusobacterium varium, Fusobacterium russii and Fusobacterium necrogenes, but formed a distinct lineage in the genus Fusobacterium. Comparative analysis of the genome of the type strain of this novel Fusobacterium sp. confirmed that it is different from other recognized Fusobacterium spp. DNA-DNA hybridization, fingerprinting and genomic %GC determination further supported the conclusion that the isolates belong to a new, distinct species. The isolates were also distinguishable from these and other Fusobacterium spp. by phenotypical characterization. The strains produced indole and exhibited proline arylamidase and glutamic acid decarboxylase activity. They did not hydrolyse esculin, did not exhibit pyroglutamic acid arylamidase, valine arylamidase, α-galactosidase, β-galactosidase, β-galactosidase-6-phosphate or α-glucosidase activity nor produced acid from cellobiose, glucose, lactose, mannitol, mannose, maltose, raffinose, saccharose, salicin or trehalose. The major fatty acids were C16 : 0 and C18 : 1ω9c. The name Fusobacterium gastrosuis sp. nov. is proposed for the novel isolates with the type strain CDW1(T) (= DSM 101753(T) = LMG 29236(T)). We also demonstrated that Clostridium rectum and Fusobacterium mortiferum represent the same species, with nomenclatural priority for the latter. [less ▲]

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See detailRéduire l’altérité au travers des processus de traduction et de représentation
Leclercq, Bruno ULg; Smette, Bernard ULg

in Doctorales. Revue LLA-SHS de Montpellier (in press)

WVO Quine questions the « myth » of an ideal realm of shared meanings which every national language would express in its own way. Against the hope of transparent translations, he insists on the necessity ... [more ▼]

WVO Quine questions the « myth » of an ideal realm of shared meanings which every national language would express in its own way. Against the hope of transparent translations, he insists on the necessity for building equivalences from one language to another through a strategy of reducing the differences in rationality among nations as much as possible. According to Quine, otherness is not insuperable impediment to meeting/encounter and mutual understanding ; by throwing our conceptual schemes on the other communities’ uses/practices – which of course involves some symbolic violence – gaps can always been narrowed. Similarly E. Laclau questions the traditional conception of political representation, which is seen as the transparent process of transmitting someone’s will or interests on another level. For this ideal conception of representation, Laclau substitutes a pragmatic conception which takes in account the irreducible gap between the actors as well as the constitutive opacity of the process of representation : the subject’s will is constituted within the process of representation and through the representative’s productive role. In order to be transposed at the decision-making level, the subject’s interests must be translated by the representative as well as be negotiated with the other represented interests. This implies that the initial will undergoes some identity transformations. [less ▲]

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See detailMaximum energy dissipation to explain velocity fields in shallow reservoirs
Westhoff, Martijn; Erpicum, Sébastien ULg; Archambeau, Pierre ULg et al

in Journal of Hydraulic Research (in press)

Shallow reservoirs are often used as sediment traps or storage basins, in which sedimentation depends on the flow pattern: Short rectangular reservoirs reveal a straight jet from inlet to outlet with on ... [more ▼]

Shallow reservoirs are often used as sediment traps or storage basins, in which sedimentation depends on the flow pattern: Short rectangular reservoirs reveal a straight jet from inlet to outlet with on both sides identical recirculation zones. In longer reservoirs, the main jet reattaches to the side of the reservoir leading to a small and a large recirculation zone. Previous studies found an empirical geometric relation describing the switch between these two flow patterns. In this study, we demonstrate, with a simple analytical model, that this switch coincides with a maximization of energy dissipation in the shear layer between the main jet and recirculation zones: Short reservoirs dissipate more energy when the flow pattern is symmetric, while longer reservoirs dissipate more energy with an asymmetric pattern. This approach enables to predict the flow patterns without detailed knowledge of small scale processes, potentially useful in the early phase of reservoir design. [less ▲]

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See detailTHE BATTLE OF THE ECLIPSE (MAY 28, 585 BC): A Discussion of the Lydo-Median treaty and the Halys border
Leloux, Kevin ULg

in Polemos (in press)

In his Book I, Herodotus relates the war between Lydia of Alyattes and Media of Cyaxares. This war ended with the well-known occurrence of the total solar eclipse, which astronomical researchers propose ... [more ▼]

In his Book I, Herodotus relates the war between Lydia of Alyattes and Media of Cyaxares. This war ended with the well-known occurrence of the total solar eclipse, which astronomical researchers propose to date to 585 BC. After these hostilities, a treaty between the two kingdoms was concluded, and was sealed by a royal wedding. This paper analyzes this event, better known as the “battle of the eclipse”. It will revisit the problem of the location of the battle and that of the identity of the Lydian and Median kings who reigned during this conflict. The paper will study the role that the eclipse played on the conclusion of hostilities and its impact on the minds of the Greeks; it will also examine the nature of the treaty concluded between the Lydians and the Medes. Finally, the paper will examine the problem of the Halys border that separated the Lydian and the Median kingdoms, modern scholars asserting that this border was chosen during the Lydo-Median treaty. This examination will allow us to study the view of the ethnic, geographical and political space that the river played in Herodotus’s mind. [less ▲]

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See detailL'Halys chez Hérodote
Leloux, Kevin ULg

in Studia Hercynia (in press)

This paper analyses the Halys River’ description made by Herodotus in his Histories. This study focuses on the several references made by the Father of History in his work. It will examine the part the ... [more ▼]

This paper analyses the Halys River’ description made by Herodotus in his Histories. This study focuses on the several references made by the Father of History in his work. It will examine the part the river took in his vision of the politic, ethnic and geographic state in the historian’s mind and the problems that arise by this presentation. Finally, this article will demonstrate that every crossing of the Halys River made by the Barbarians were a bad omen for the Greeks of Asia Minor and in Greece itself. [less ▲]

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See detailUn parcours dans la psychologie clinique et la psychiatrie à l’Université de Liège : singularités et originalités
Mormont, Christian ULg; Englebert, Jérôme ULg

in Genin, Vincent (Ed.) Deux siècles au service des sciences humaines : Contribution(s) de l’Université de Liège 1817-2017 (in press)

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See detailComparison of soil water potential sensors: a drying experiment
Degré, Aurore ULg; van der Ploeg, Martine; Caldwell, Todd et al

in Vadose Zone Journal (in press)

The soil water retention curve (WRC) plays a major role in soil’s hydrodynamic behaviour. Many measurement techniques are currently available for determining WRC in the laboratory. Direct in situ WRC can ... [more ▼]

The soil water retention curve (WRC) plays a major role in soil’s hydrodynamic behaviour. Many measurement techniques are currently available for determining WRC in the laboratory. Direct in situ WRC can be obtained from simultaneous soil moisture and water potential readings covering a wide tension range, from saturation to wilting point. There are many widely used soil moisture probes. Whereas near-saturation tension can be measured using water-filled tensiometers, wider ranges of water potential require new, more expensive and less widely used probes. This paper reports on a comparison of three types of soil water potential sensors that could allow us to measure water potential in the field, with a range relevant to water uptake by plants. Polymer tensiometers (POTs), MPS-2 probes and pF-meters were compared, in a controlled drying experiment. The study showed that the POTs and MPS-2 probes had good reliability in their respective range. Combined with a soil moisture probe, these two sensors can provide observed WRCs. The pF-meters below -30 kPa were inaccurate and their response was sensitive to measurement interval, with greater estimated suction at shorter measurement intervals. Recommendations are provided for future tests. In situ-WRC can provide supplementary information, particularly with regard to its spatial and temporal variability. It could also improve the results of other measurement techniques, such as geophysical observations. [less ▲]

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See detailLes corps saints des catacombes de Rome aux Pays-Bas : acteurs, réseaux, flux
Delfosse, Annick ULg

in Duhamelle, Christophe; Bacciochi, Stéphane (Eds.) Les corps saints des catacombes dans l’espace de la catholicité à l’âge moderne (XVIIe-XIXe siècles) (in press)

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See detailA threshold-based weather model for predicting stripe rust infection in winter wheat
El Jarroudi, Moussa ULg; Kouadio, Louis; Bock, Clive et al

in Plant Disease (in press)

Wheat stripe rust (caused by Puccinia striiformis f. sp. tritici) is a major threat in most wheat growing regions worldwide, which potentially causes substantial yield losses when environmental conditions ... [more ▼]

Wheat stripe rust (caused by Puccinia striiformis f. sp. tritici) is a major threat in most wheat growing regions worldwide, which potentially causes substantial yield losses when environmental conditions are favorable. Data from 1999-2015 for three representative wheat-growing sites in Luxembourg were used to develop a threshold-based weather model for predicting wheat stripe rust. First, the range of favorable weather conditions using a Monte Carlo simulation method based on the Dennis model were characterized. Then, the optimum combined favorable weather variables (air temperature, relative humidity, and rainfall) during the most critical infection period (May-June) was identified and was used to develop the model. Uninterrupted hours with such favorable weather conditions over each dekad (i.e., 10-day period) during May-June were also considered when building the model. Results showed that a combination of relative humidity > 92% and 4°C < temperature < 16°C for a minimum of 4 continuous hours, associated with rainfall ≤ 0.1 mm (with the dekad having these conditions for 5-20% of the time), were optimum to the development of a wheat stripe rust epidemic. The model accurately predicted infection events: probabilities of detection were ≥ 0.90 and false alarm ratios were ≤ 0.38 on average, and critical success indexes ranged from 0.63 to 1. The method is potentially applicable to studies of other economically important fungal diseases of other crops or in different geographical locations. If weather forecasts are available, the threshold-based weather model can be integrated into an operational warning system to guide fungicide applications. [less ▲]

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See detailOnderhandelen over vorming van een meerderheid en burgemeester worden in België : Welke invloed heeft de regionale wetgeving ?
Grandjean, Geoffrey ULg

in Chroniques de Droit Public = Publiekrechtelijke Kronieken (in press)

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See detailHarzé - La Gleize. Carte géologique de la Wallonie. Notice explicative
Lamberty, Pauline ULg; Marion, Jean-Marc ULg; Mottequin, Bernard et al

Book published by SPW/Editions (in press)

New geological map of Wallonia published at the scale of 1/25.000, based on a new field work and using previous scientific data produced, since the first edition published in 1899 (Gustave Dewalque) at ... [more ▼]

New geological map of Wallonia published at the scale of 1/25.000, based on a new field work and using previous scientific data produced, since the first edition published in 1899 (Gustave Dewalque) at the scale of 1/40.000 by the "Commission Géologique de Belgique" and the second one, published in 1959 (Asselberghs & Geukens) at the scale of 1/40.000 by the Geological Survey of Belgium. [less ▲]

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See detailPer una edizione integrale e analitica dell'incipit della Storia d'Italia di Francesco Guicciardini
Moreno, Paola ULg

in Laboratoire Italien : Politique et Société (in press)

Detailed reference viewed: 62 (18 ULg)
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See detailQuando l’autore corregge se stesso. Il caso unico del copialettere di Francesco Guicciardini
Moreno, Paola ULg

in Berra, Claudia (Ed.) Epistolari dal Due al Seicento. Modelli, questioni ecdotiche, edizioni, cantieri aperti. (in press)

Detailed reference viewed: 23 (3 ULg)