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See detailLes abris artificiels: un outil pour les inventaires herpétologiques et le suivi des populations de reptiles
Graitson, Eric ULg; Naulleau, Guy

in Bulletin de la Société Herpétologique de France (2005), 115

We present a bibliographic review on the use of artificial shelters to obtain herpetological species check-lists in Western Europe. The methodologies in the different studies are compared. Three different ... [more ▼]

We present a bibliographic review on the use of artificial shelters to obtain herpetological species check-lists in Western Europe. The methodologies in the different studies are compared. Three different kinds of listing are distinguished: qualitative, semi-qualitative, and quantitative. Comparisons across studies show that the use of shelter-plates highly favours the detection of at least five species (Anguis fragilis, Coluber viridiflavus, Coronella austriaca, Elaphe longissima, and Natrix natrix). Plates also allow the detection of juvenile individuals more reliably than the visual searching method. Shelter use increases with time. More variation was found in the detection of Viperids, Lacertids and some amphibians. For these species, artificial shelter use is useful for qualitative listings but the procedure should be improved for quantitative listings. [less ▲]

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See detailPerception of aphid infested tomato plant volatiles by the predator Episyrphus balteatus
Verheggen, François ULg; Arnaud, Ludovic; Capella, Quentin et al

in Communications in Agricultural and Applied Biological Sciences (2005)

In a tritrophic interaction including tomato plant (Lycopersicon esculentum Miller), the herbivore Myzus persicae (Sulzer) and the predator Episyrphus balteatus (De Geer), the perception of the tomato ... [more ▼]

In a tritrophic interaction including tomato plant (Lycopersicon esculentum Miller), the herbivore Myzus persicae (Sulzer) and the predator Episyrphus balteatus (De Geer), the perception of the tomato plants produced volatile organic compounds (VOC) by Episyrphus balteatus is investigated. In a first step, an odour sampling device has been set up aiming the headspace collection of the tomato plant VOC and their adsorption on Tenax adsorbent cartridges (Supelco®). Following desorption is held using a thermodesorption injector (Gerstel®) coupled with GC-MS. Intact and aphid infested plants are studied for their VOC emissions, as well as the comparison of the VOC emission of different tomato cultivars. These VOC consist mainly in mono- and sesquiterpenes (such as - and -pinene ; -humulene ; …) as well as in C6-volatiles like hexenal in case of infestation by herbivores Once the tomato plants VOC identified and quantified, they are tested for their perception by Episyrphus balteatus using electroantennography (EAG). Accordingly, an EAG device has been installed and configured for the study of VOC using Diptera antennas. The monoterpenes limonene and linalool showed high EAG activity whereas other terpenes like cymene seem to be inactive. [less ▲]

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See detailEstimations of the Influence of the Non-Linearity of the Aerodynamic Coefficients on the Skewness of the Loading
Denoël, Vincent ULg; Degée, Hervé ULg

in Proceedings of the 6th Asia-Pacific Conference on Wind Engineering (2005)

This paper is devoted to the non linear quasi-steady aerodynamic loading. A linear approximation is often used to compute the response of structures to buffeting forces. Some researchers have however ... [more ▼]

This paper is devoted to the non linear quasi-steady aerodynamic loading. A linear approximation is often used to compute the response of structures to buffeting forces. Some researchers have however shown that it is possible to account for the non linearity of this loading. This non linearity can come (i) from the squared velocity or (ii) from the shape of the aerodynamic coefficients (as functions of the wind angle of attack). In this paper, we show that this second origin can have significant implications on the design of the structure, particularly when the non linearity of the aerodynamic coefficient is important (obvious, isn’t it?) or when the transverse turbulence is important. This paper is devoted to the non linear quasi-steady aerodynamic loading. A linear approximation is often used to compute the response of structures to buffeting forces. Some researchers have however shown that it is possible to account for the non linearity of this loading. This non linearity can come (i) from the squared velocity or (ii) from the shape of the aerodynamic coefficients (as functions of the wind angle of attack). In this paper, we show that this second origin can have significant implications on the design of the structure, particularly when the non linearity of the aerodynamic coefficient is important (obvious, isn’t it?) or when the transverse turbulence is important. [less ▲]

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See detailContribution à la mise au point de la cDNA-AFLP sur bananes
Lassois, Ludivine ULg

Master of advanced studies dissertation (2005)

Obtaining ARN of quality and in sufficient quantity is an essential stage in the realization of cDNA-AFLP. The effectiveness of several protocols of RNA extraction was evaluated on peel and pulp of green ... [more ▼]

Obtaining ARN of quality and in sufficient quantity is an essential stage in the realization of cDNA-AFLP. The effectiveness of several protocols of RNA extraction was evaluated on peel and pulp of green and yellow bananas. On peel and pulp of green bananas, 4 protocols were tested and two of them allowed obtaining RNA of good quality and in sufficient quantity. They acts of the protocol described by Liu and al. (1998) and that proposed by the CIRAD (not published) and which is a modified version of Wan and Wilkins (1994). However, new tests must be realized in order to choose more adapted in the case of the extractions on peel and pulp of green bananas. Seven protocols were tested and compared on peel and pulp of yellow bananas. Among those, the protocols describes by Liu and al. (1998) and that proposed by the CIRAD (not published) gave the best results. [less ▲]

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See detailGuidelines for the Diagnosis and Treatment of Chronic Heart Failure: executive summary (update 2005)
Swedberg, Karl; Cleland, John; Dargie, Henry et al

in Revista espanola de cardiologia (2005), 58(9), 1062-92

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See detailComment concevoir un quartier « multifonction » pour promouvoir un développement urbain durable ?
Teller, Jacques ULg; Becue, V.

in Proc. du colloque Développement urbain durable, gestion des ressources et gouvernance (2005)

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See detailTechnique of mural paintings from the Tournai Cathedral
Lepot, Laurent ULg; Denoël, Sophie; Gilbert, Bernard ULg

Poster (2005)

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See detailAn effective decision procedure for linear arithmetic over the integers and reals
Boigelot, Bernard ULg; Jodogne, Sébastien ULg; Wolper, Pierre ULg

in ACM transactions on Computational Logic (2005), 6(3), 614--633

This article considers finite-automata-based algorithms for handling linear arithmetic with both real and integer variables. Previous work has shown that this theory can be dealt with by using finite ... [more ▼]

This article considers finite-automata-based algorithms for handling linear arithmetic with both real and integer variables. Previous work has shown that this theory can be dealt with by using finite automata on infinite words, but this involves some difficult and delicate to implement algorithms. The contribution of this article is to show, using topological arguments, that only a restricted class of automata on infinite words are necessary for handling real and integer linear arithmetic. This allows the use of substantially simpler algorithms, which have been successfully implemented. [less ▲]

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See detailDe spelling van 'overhijt': Wie moet bepalen hoe we schrijven?
Meesters, Gert ULg

in Over Taal (2005), 44(4), 82-85

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See detailSeismic assessment of an S-shape building with expansion joints
Plumier, André ULg; Denoël, Vincent ULg; Sanchez, Luiz et al

(2005)

An elastic analysis of an existing 20-storey reinforced concrete moment resisting frame divided in 3 blocks shows that beams supported on corbels of the adjacent block at the expansion joint loose their ... [more ▼]

An elastic analysis of an existing 20-storey reinforced concrete moment resisting frame divided in 3 blocks shows that beams supported on corbels of the adjacent block at the expansion joint loose their support when each independent block vibrate on its own under earthquake. Different reconnection hypothesis were considered, ranging from fixing totally each block to the adjacent one to more flexible options leaving some free relative move between blocks. An elastic modal superposition followed by a pushover analysis considering the final reconnection principle were made. The degrees of freedom of the joint reconnections were observed to be an important parameter. The solution found leaves a free relative rotational move between blocks and a flexible translational movement, so that forces at the connection do not become uselessly high. The springs used (long tie rods) work essentially elastically so that no permanent relative displacement exists between blocks after an earthquake. [less ▲]

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See detailOscillators as Systems and Synchrony as a Design Principle
Sepulchre, Rodolphe ULg

in Menini, L.; Zaccarian, L.; Abdallah, C. T. (Eds.) Current trends in nonlinear systems and control (2005)

The chapter presents an expository survey of ongoing research by the author on a system theory for oscillators. Oscillators are regarded as open systems that can be interconnected to robustly stabilize ... [more ▼]

The chapter presents an expository survey of ongoing research by the author on a system theory for oscillators. Oscillators are regarded as open systems that can be interconnected to robustly stabilize ensemble phenomena characterized by a certain level of synchrony. The first part of the chapter provides examples of design (stabilization) problems in which synchrony plays an important role. The second part of the chapter shows that dissipativity theory provides an interconnection theory for oscillators. [less ▲]

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See detailSpelling 2005: een principieel stormpje
Meesters, Gert ULg

in Over Taal (2005), 44(5), 110-113

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See detailCorpora en toegepaste taalnormen
Meesters, Gert ULg

in Hiligsmann, Philippe; Janssens, Guy; Vromans, Joseph (Eds.) Woord voor woord, zin voor zin: Liber Amicorum voor Siegfried Theissen (2005)

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See detailProduction,digestion et absorption des acides gras chez le ruminant
Cuvelier, Christine ULg; Cabaraux, Jean-François ULg; Dufrasne, Isabelle ULg et al

in Annales de Médecine Vétérinaire (2005), 149(1), 49-59

From a biochemical point of view, in ruminants, there are two major groups of fatty acids. They are firstly the volatile fatty acids from the rumen metabolism of dietary carbohydrates, and secondly the ... [more ▼]

From a biochemical point of view, in ruminants, there are two major groups of fatty acids. They are firstly the volatile fatty acids from the rumen metabolism of dietary carbohydrates, and secondly the fatty acids from the rumen metabolism of lipids. This second group is made of the fatty acids synthesized by the microorganisms of the rumen and the fatty acids originating from the hydrolysis of dietary triacylglycerols, which are mostly hydrogenated by microorganisms in the rumen before intestinal absorption. In such conditions, the absorbed fatty acids are always more saturated than the ingested fatty acids. [less ▲]

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See detailGenetic evaluation of cow survival using a lactation random regression model
Gengler, Nicolas ULg; Vanderick, Sylvie ULg; Mayeres, Patrick et al

in INTERBULL Bulletin (2005), 33

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