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See detailLaboratory tests and normal operation regarding the electric field intensity.
Lilien, Jean-Louis ULg; Pirotte, Pol

in Proceedinsg of the 4th ISH (1983, September 05)

Influence of the electrode shape and room size in testing is investigated.

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See detailLaboratory validation of a lateral flow device for the detection of CyHV-3 antigens in gill swabs
Vrancken, Robert; Boutier, Maxime ULg; Ronsmans, Maygane ULg et al

in Journal of Virological Methods (2013), 193

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See detailLaboratory, field and airborne spectroscopy for monitoring organic carbon content in agricultural soils
Stevens, A.; van Wesemael, B.; Tychon, Bernard ULg et al

Conference (2007, October)

This study explains the potential and the limits of a field ASD spectrometer and a CASI airborne instrument to assess the Soil Organic Carbon, in the context of soil carbon mapping.

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See detailLaboratory, field and airborne spectroscopy for monitoring organic carbon content in agricultural soils.
Stevens, A.; Van Wesemael, B.; Bartholomeus, H. et al

in Geoderma (2008), 144

The temporal evolution in Soil Organic Carbon (SOC) content is often used in estimations of greenhouse gas fluxes and is an important indicator of soil quality. Regional estimates of SOC changes can only ... [more ▼]

The temporal evolution in Soil Organic Carbon (SOC) content is often used in estimations of greenhouse gas fluxes and is an important indicator of soil quality. Regional estimates of SOC changes can only be obtained by analyzing very large number of samples over large areas due to the strong spatial variability in SOC contents. Visible and Near Infrared Spectroscopy (VNIRS) provides an alternative to chemical analyses. The benefits of this technique include a reduction of the sampling processing time, an increase of the number of samples that can be analyzed within time and budget constraints and hence an improvement of the detection of small changes in SOC stocks for a given area. Carbon contents are predicted from spectra through Partial Least Square Regressions (PLSR). The performance of three different instrumental settings (laboratory, field and airborne spectroscopy) has been assessed and their relative advantages for soil monitoring studies have been outlined using the concept of Minimal Detectable Difference. It appears that ground-based spectrometers give Root Mean Square Errors of Cross-Validation similar to the limit of repeatability of a routine SOC analytical technique such as the Walkley and Black method (±1 g C kg−1). The airborne spectrometer, despite its greater potential to cover large areas during a single flight campaign, has some difficulties to reach such values due to a lower Signal-to- Noise Ratio. Because of its statistical nature, the method and its potential rely on the stability of the calibrations obtained. It appears that calibrations are currently site-specific due to variation in soil type and surface condition. However, it is shown that PLSR can take into account both soil and spectral variation caused by different measuring campaigns and study areas. Further research is needed to develop regional spectral libraries in order to be able to use VNIRS as a robust analytical technique for precisely determining the SOC content and its spatial variation. [less ▲]

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See detailLabour Migration at European Level : New Schemes of Temporary Mobility
Gsir, Sonia ULg

Conference (2012)

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See detailThe LabSET team : Projects, Knowledge building, Services and Technical environment
Poumay, Marianne ULg

Scientific conference (2006, November 08)

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See detailLabyrinth and Piano Key Weirs - PKW 2011
Erpicum, Sébastien ULg; Laugier, Frédéric; Boillat, Jean Louis et al

Book published by CRC Press/Balkema (2011)

The Piano Key Weir (PKW) is a weir of particular geometry, associating to a labyrinth shape the use of overhangs to reduce the basis length. The PKW can thus be directly placed on a dam crest. Together ... [more ▼]

The Piano Key Weir (PKW) is a weir of particular geometry, associating to a labyrinth shape the use of overhangs to reduce the basis length. The PKW can thus be directly placed on a dam crest. Together with its important discharge capacity for low heads (several times the one of a linear Creager weir), this geometric feature makes the PKW an interesting solution for dams rehabilitation as well as new constructions. However, PKW constitutes a new type of weir, firstly designed in 2001 and built for the first time in 2006 by EDF. With several researches and projects on PKW all over the world, the workshop about Labyrinth and Piano Key Weirs aimed at bringing together all the people (engineers, researchers,...) interested to state and summarize the current knowledge on this still non conventional hydraulic structure. The main themes tackled during the conference concern followings: • Physical Modeling. Hydraulic capacity • Physical Modeling. Downstream fittings • Numerical Modeling • Hydraulic Design • Planned and achieved projects • Nomenclature, Database, Future developments The papers reviewed and accepted by an International Scientific Committee and presented during the workshop sessions are published in the present book which constitutes a reference on the subject. [less ▲]

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See detailLabyrinth and Piano Key Weirs II - PKW 2013
Erpicum, Sébastien ULg; Laugier, Frédéric; Pfister, Michael et al

Book published by CRC Press/Balkema (2013)

Dam engineering is currently experiencing a strong revival of labyrinth oriented weirs. Labyrinth weirs, with a repetitive constructional character and an increased specific discharge capacity, are a very ... [more ▼]

Dam engineering is currently experiencing a strong revival of labyrinth oriented weirs. Labyrinth weirs, with a repetitive constructional character and an increased specific discharge capacity, are a very good technico-economical compromise. The concept of Piano Key Weir (PKW), with alveoli developed in overhangs from a reduced support area, enables to install non-linear crests at the top of concrete dams. It eliminates thus the main drawback of classical labyrinth weirs and enables their use to rehabilitate numerous existing dams. Since the first implementation of PKW by Electricité de France on Goulours dam (France) in 2006, at least eight PKWs have been built in France, Vietnam and Switzerland. Their operation over a few years has already provided the first prototype data. Other projects are under study, construction or planning in varied countries. On another hand, research programs are under progress all over the world. Following a first edition in Liege (Belgium) in 2011, the 2nd international workshop on Labyrinth and PKW aims at bringing together people with varied background (engineers, researchers,...) to state and summarize the current knowledge on these still non-conventional hydraulic structures. The papers reviewed and accepted by an International Scientific Committee and presented during the workshop sessions are published in the present book which can be considered as an up-to-date Reference document. [less ▲]

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See detailThe Labyrinth of Past/Present/Future in five recent poems by Brathwaite
Pagnoulle, Christine ULg

in Davis, Geoffrey; Maes-Jelinek, Hena (Eds.) Cross/Cultures 1 - Crisis and Creativity in the New Literatures in English (1990)

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See detailThe Labyrinth of Universality: Wilson Harris's Visionary Art of Fiction
Maes-Jelinek, Hena ULg

Book published by Rodopi (2006)

Detailed reference viewed: 6 (0 ULg)
See detailLe labyrinthe et son habitat
Duchesne, Jean-Patrick ULg

in Luis Salazar, peintre, 1990-2000 (2001)

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See detailLabyrinthine Granular Landscapes
Caps, Hervé ULg; Vandewalle, Nicolas ULg

in Physical Review. E : Statistical, Nonlinear, and Soft Matter Physics (2001), 64(5, Pt 1), 52301

We have numerically studied a model of granular landscape eroded by wind. We show the appearance of labyrinthic patterns when the wind orientation turns by 90 degrees. The occurrence of such structures is ... [more ▼]

We have numerically studied a model of granular landscape eroded by wind. We show the appearance of labyrinthic patterns when the wind orientation turns by 90 degrees. The occurrence of such structures is discussed. Moreover, we introduce the density n(k) of "defects" as the dynamic parameter governing the landscape evolution. A power-law behavior of n(k) is found as a function of time. In the case of wind variations, the exponent (drastically) shifts from two to one. The presence of two asymptotic values of n(k) implies the irreversibility of the labyrinthic formation process. [less ▲]

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See detailLe lac Kivu: bilan des connaissances scientifiques et gestion de ses ressources
Darchambeau, François ULg; Descy, Jean-Pierre

Conference (2009, May 08)

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See detailLacan et la philosophie
Seba, Jean-Renaud ULg

Scientific conference (2005, January 25)

Detailed reference viewed: 24 (1 ULg)
See detailLacidad y neutralidad del estado
Jacquemain, Marc ULg

Scientific conference (2010, September)

The paper exposes the main lines of french republican secularism as oposed to belgian neutrality. It shows how the former presuposes a basic distrust again religion, while the latter is mainly based on ... [more ▼]

The paper exposes the main lines of french republican secularism as oposed to belgian neutrality. It shows how the former presuposes a basic distrust again religion, while the latter is mainly based on equal treatment. The link is also made whith the growing xenophobia in Europe and the way "secularism" is sometimes used to hide what is in fact a xenophobic position. [less ▲]

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See detailLack of agreement on fragmentation metrics blurs correspondence between fragmentation experiments and predicted effects.
Bogaert, Jan ULg

in Conservation Ecology : A Peer-reviewed Journal of Integrative Science and Fundamental Policy Research (2003), 7(1),

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See detailLack of Association between Adult Asthma and the Tumour Necrosis Factor Alpha-308 Polymorphism Gene
Louis, Renaud ULg; Leyder, E.; Malaise, Michel ULg et al

in European Respiratory Journal (2000), 16(4), 604-8

Tumour necrosis factor (TNF)alpha is a cytokine endowed with potent inflammatory properties that may contribute to airway inflammation in asthma. It has previously been shown that the single base pair ... [more ▼]

Tumour necrosis factor (TNF)alpha is a cytokine endowed with potent inflammatory properties that may contribute to airway inflammation in asthma. It has previously been shown that the single base pair polymorphism-308 (G to A substitution) in the promoter of TNFalpha gene results in enhanced cytokine secretion. Whether this polymorphism is associated with the presence of phenotypic expression of asthma is questioned. In this study the relative frequency of TNF1 and TNF2 alleles in a population of adult healthy subjects (n=98) and adult Caucasian asthmatics (n=95) was compared taking into account their disease severity, atopic status and their smoking habit. For the whole group of asthma the genotype frequency for 1/1, 1/2, 2/2 were 67%, 33% and 0%, respectively, and not significantly different from those found in the control group that reached 70%, 28% and 2% respectively (p>0.05). The allele frequencies in asthma were 86% and 14% for TNF1 and TNF2 respectively while the corresponding figures were 85% and 15% in the control group (p>0.05). Furthermore, subdividing asthmatics into severe forced expiratory volume in one second <60% pred), atopic or smoking patients did not show any significant association with this TNFalpha polymorphism. To conclude the polymorphism -308 in the promoter of the TNFalpha gene does not confer a susceptibility to develop asthma nor to grade its severity. [less ▲]

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