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See detailOverhead power lines real time monitoring : a future trend ?
Lilien, Jean-Louis ULg

Conference given outside the academic context (2005)

general overview of ampacity problem in power lines

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See detailOverhead transmission line galloping. A comparative study between 2-DOF and 3-DOF models.
wang, Jianwei; Lilien, Jean-Louis ULg

in Hogge, Michel; dick, E. (Eds.) Actes du 3ème CNBM (1994, May)

2-D and 3-D models of power line galloping are detailed for multi-span power lines, including suspension insulator movement, tension changes and aerodynamic lift, drag and pitching moment.

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See detailOverhead transmission lines design. Some mechanical aspects.
Lilien, Jean-Louis ULg; wang, jianwei; chabart, olivier et al

in Proceedings of the ICPST'94 (1994, October)

3-DOF galloping model of power lines.

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See detailOverheidsopdrachten en andere overheidsovereenkomsten van de lidstaten: 2010 (Kroniek van de Europese rechtspraak)
Durviaux, Ann-Lawrence ULg

in Marchés et Contrats Publics = Overheidsopdrachten en -Overeenkomsten (2011), 2/2011

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See detail'Overlapping Territories, Intertwined Histories': Cross-Culturality in Caryl Phillips's Crossing the River
Ledent, Bénédicte ULg

in Journal of Commonwealth Literature (1995), 30(1), 55-62

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See detailAn overlay maintenance protocol for overlay routing on top of ad hoc networks
Calomme, Sandrine; Leduc, Guy ULg

in Lecture Notes in Computer Science (2008, May), 4982

The protocol described in this paper builds and maintains an overlay topology on top of an ad hoc network. The overlay is intended to be used by a routing application. As flooding is a key component of ... [more ▼]

The protocol described in this paper builds and maintains an overlay topology on top of an ad hoc network. The overlay is intended to be used by a routing application. As flooding is a key component of many route discovery mechanisms in MANETs, we evaluate the delivery percentage, bandwidth consumption and time duration of flooding a message on the overlay. We also consider the overlay path stretch as an indicator for the data transfer transmission time. The protocol does not require any information from the underlay routing protocol, nor cooperation from the nodes that do not belong to the overlay. Each overlay node maintains a set of nearest overlay nodes and exchanges its neighbourhood information with them in order to select useful overlay links. Resilience is afforded by setting a minimum number of overlay neighbours. The performance observed over OLSR are good, for all overlay densities and mobility level studied. [less ▲]

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See detailOverlay Routing using Coordinate Systems
Cantin, François ULg; Gueye, Cheikh Ahmadou Bamba ULg; Kaafar, Mohamed Ali ULg et al

Poster (2008, December)

We address the problem of finding indirect overlay paths that reduce the latency between pairs of nodes in an overlay. To this end we propose to rely on an Internet Coordinate System (ICS), namely Vivaldi ... [more ▼]

We address the problem of finding indirect overlay paths that reduce the latency between pairs of nodes in an overlay. To this end we propose to rely on an Internet Coordinate System (ICS), namely Vivaldi, to estimate RTTs and help find these interesting detours. We define two initial criteria to illustrate our approach and assess their true/false positive rates. [less ▲]

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See detailAn overlay tree building control protocol
Mathy, Laurent ULg; Canonico, R.; Hutchison, D.

in Networked Group Communication (2001)

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See detailDe overmoed van de toevallige standaard
Meesters, Gert ULg

in Over Taal (2003), 42(5), 106-107

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See detailOvero lethal white syndrome - two case reports and a review of the litterature
Sandersen, Charlotte ULg; Delguste, Catherine ULg; Cassart, Dominique ULg et al

in Annales de Médecine Vétérinaire (2003), 147(5, OCT-NOV), 359-364

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See detailOverproduction and properties of the mannuronate alginate lyase AlxMB
Malissard, Martine; Chavagnat, Frédéric; Duez, Colette ULg et al

in FEMS Microbiology Letters (1995), 126(2), 105-111

In previous studies (Malissard et al., FEMS Microbiol. Lett. (1993) 110, 101-106), the alginate lyase AlxM of the marine bacterium ATCC 433367 was produced in Escherichia coli TC4/pAL-A3 with a yield of ... [more ▼]

In previous studies (Malissard et al., FEMS Microbiol. Lett. (1993) 110, 101-106), the alginate lyase AlxM of the marine bacterium ATCC 433367 was produced in Escherichia coli TC4/pAL-A3 with a yield of 50 mu g per litre of culture. The polypeptide chain was cleaved between two cysteine residues, C169 and C183, themselves linked by a disulphide bridge. AlxM has now been overproduced in E. coli BL21(DE3)/pAL-Sur/pLysS. Under conditions in which formation of inclusion bodies can be avoided, the enzyme is synthesized as a catalytically active, water-soluble, unnicked polypeptide with a yield of 32 mg per litre of culture. It has been purified to protein homogeneity using a one-step procedure. The nicked ALxM(A) and unnicked ALxM(B) alginate lyases have identical alginate-degrading activities at high salt concentrations. [less ▲]

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See detailOverproduction of g-decalactone by short-chain acyl-CoA oxidase blockage in Yarrowia lipolytica
Waché, Y.; Aguedo, Mario ULg; LeDall, M.-T. et al

Conference (1999, September)

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See detailOverproduction of lipase by Yarrowia lipolytica mutants
Fickers, Patrick ULg; Nicaud, J. M.; Destain, Jacqueline ULg et al

in Applied Microbiology & Biotechnology (2003), 63(2), 136-142

Non-genetically modified mutants with increased capacities of extracellular lipase production were obtained from Yarrowia lipolytica strain CBS6303 by chemical mutagenesis. Of the 400 mutants isolated ... [more ▼]

Non-genetically modified mutants with increased capacities of extracellular lipase production were obtained from Yarrowia lipolytica strain CBS6303 by chemical mutagenesis. Of the 400 mutants isolated, LgX64.81 had the highest potential for the development of an industrial lipase production process. This mutant exhibits lipase production uncoupled from catabolite repression by glucose, and a 10-fold increased productivity upon addition of oleic acid. Using a LIP2-LacZ reporter gene, we demonstrate that the mutant phenotype originates from a trans-acting mutation. The glucose uptake capacity of LgX64.81 is reduced 2.5-fold compared to the wild-type-strain, and it exhibits high lipase production on glucose medium. A trans-acting mutation in a gene involved in glucose transport could thus explain this mutant phenotype. [less ▲]

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See detailOverriding the norm: the use of gender-marked personal pronouns in spoken language
De Vos, Lien ULg

Scientific conference (2011, March 18)

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See detailOvershooting and semiconvection: structural changes and asteroseismic signatures
Noels-Grötsch, Arlette ULg; Montalban Iglesias, Josefa ULg; Miglio, Andrea ULg et al

in Astrophysics & Space Science (2010), 328

Overshooting and semiconvection are two poorly known mechanisms which affect the extent and the efficiency of chemical mixing outside classical convection zones in stars. We discuss the uncertainties and ... [more ▼]

Overshooting and semiconvection are two poorly known mechanisms which affect the extent and the efficiency of chemical mixing outside classical convection zones in stars. We discuss the uncertainties and the inferences of those processes in main sequence stars burning hydrogen in a convective core. We then focus on the asteroseismic signatures of partially or fully mixed zones surrounding the convective core, through the detailed shape of the induced chemical composition profile. We emphasize the potential power of asteroseismology to determine the internal structure of stars and thus to help us understand the physical processes at work inside the stars. [less ▲]

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See detailOvershootings and spurious oscillations caused by biharmonic mixing
Delhez, Eric ULg; Deleersnijder, Eric

in Ocean Modelling (2007), 17(3), 183-198

Biharmonic mixing is often used in large scale numerical models of the ocean because of its scale selectivity; it effectively damps small scale noise and leaves the large scale dynamics nearly unaffected ... [more ▼]

Biharmonic mixing is often used in large scale numerical models of the ocean because of its scale selectivity; it effectively damps small scale noise and leaves the large scale dynamics nearly unaffected. The biharmonic operator lacks however positiveness and monotonicity and can therefore produce unphysical results exhibiting spurious overshootings and oscillations. This problematic behaviour cannot be avoided by the addition of an ordinary Laplacian diffusion term. It appears in both continuous and discrete approaches/solutions in both unbounded and bounded domains. The overshootings and oscillations are induced by the strong damping of the smaller scale modes and are therefore comparable to the Gibbs' phenomenon. With appropriate boundary conditions, the variance of the field decreases monotonically and the oscillations are expected to remain small. The lack of positiveness is however a severe drawback for (dynamic) tracer studies. (C) 2007 Elsevier Ltd. All rights reserved. [less ▲]

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See detailOverview and Benchmarking of Motion Detection Methods
Jodoin, Pierre-Marc; Pierard, Sébastien ULg; Wang, Yi et al

in Bouwmans; Porikli; Hoferlin (Eds.) et al Background Modeling and Foreground Detection for Video Surveillance (2014)

In this chapter, we provide an overview of the most highly cited motion detection meth- ods. We identify the most commonly used background models together with their features, the kind of updating scheme ... [more ▼]

In this chapter, we provide an overview of the most highly cited motion detection meth- ods. We identify the most commonly used background models together with their features, the kind of updating scheme they use, some spatial aggregation models as well as the most widely used post-processing operations. We also provide an overview of datasets used to validate motion detection methods. Please note that this literature review is by no means exhaustive and thus we provide a list of surveys that the reader can rely on for further details. [less ▲]

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See detailOverview of animal related-accidents in one of the world’s densest road network region
Lehaire, François ULg; Morelle, Kevin ULg; Lejeune, Philippe ULg et al

Poster (2012, October)

With its 4.7 km/km² of public roads, Southern Belgium (Wallonia) has one of the densest road network of Western Europe. This network as well as the observed increase in main game species populations (red ... [more ▼]

With its 4.7 km/km² of public roads, Southern Belgium (Wallonia) has one of the densest road network of Western Europe. This network as well as the observed increase in main game species populations (red deer, roe deer and wild boar) make Wallonia an interesting region for studying the patterns of traffic accidents caused by animals. Moreover, compared to most of European countries, no statistics are available for this area. To shed light on the current situation of wildlife roadkills, the police database of traffic accident statement was thoroughly investigated. Those statements concern accidents that occurred between 2006 and 2010. Each record includes date, time, species involved and information about the location of the accident event. Based on this dataset, we have analysed (i) composition and percentage of involved species, (ii) the consequence (material damages / bodily injuries), (iii) the spatial (type of roads, proximity to landscape features, ‘hot spot’ map) and (iv) temporal (daily, weekly and seasonal) distribution of animal-related accidents. In conclusion future research perspectives are presented. [less ▲]

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See detailOverview of CO2 dynamics within sea ice
Delille, Bruno ULg; Geilfus, Nicolas-Xavier ULg; Vancoppenolle, M. et al

Conference (2011)

Detailed reference viewed: 11 (4 ULg)