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See detailHigh-frequency correction method for CO2 and water vapour fluxes: an application on Walloon Terrestrial Observatories data
De Ligne, Anne ULg

Report (2015)

High frequency concentration fluctuations are attenuated by the eddy covariance (EC) sensors system. This is due to an inability of the EC system to process eddies of small size and induces an ... [more ▼]

High frequency concentration fluctuations are attenuated by the eddy covariance (EC) sensors system. This is due to an inability of the EC system to process eddies of small size and induces an underestimation of the fluxes. The two main reasons are the fluid frictions through the inlet tube of the gas analyzer and the separation of the sensors position between the center of the anemometer and the inlet tube. A correction factor is then needed for CO2 and H2O fluxes. In this study, we describe a new procedure for the high frequency correction (HFC). This new HFC is applied for the CO2 and H2O fluxes measured at Vielsalm and Lonzée since their setup. Finally, we compare the former and updated corrected fluxes of these two sites which are part of the Terrestrial Observatories of Belgium. Both Observatories are included in the European ecosystem network of ICOS. [less ▲]

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See detailHigh-Frequency Integral Equation Solver for 3-D Wave Scattering Around Convex Obstacles
Geuzaine, Christophe ULg; Bruno, Oscar; V Sabariego, Ruth ULg et al

in Proceedings of 6ème Conférence Européenne sur les Méthodes Numériques en Electromagnétisme (NUMELEC2008) (2008)

We present a numerical method for the computation of wave scattering by convex three-dimensional obstacles, which exhibits a bounded computational complexity for arbitrarily high frequencies. The method ... [more ▼]

We present a numerical method for the computation of wave scattering by convex three-dimensional obstacles, which exhibits a bounded computational complexity for arbitrarily high frequencies. The method is based on a combination of a high-frequency ansatz for the unknown density in a boundary integral formulation of the problem, and an extension of the ideas of the method of stationary phase to allow for the efficient integration of oscillatory functions. The method builds upon the ideas proposed in [2] and [1]. [less ▲]

Detailed reference viewed: 157 (31 ULg)
See detailHigh-Frequency Integral Equation Solvers for Acoustic and Electromagnetic Scattering Problems
Geuzaine, Christophe ULg

Scientific conference (2007, December 12)

Detailed reference viewed: 6 (1 ULg)
See detailHigh-Frequency Integral Equation Solvers for Acoustic and Electromagnetic Scattering Problems
Geuzaine, Christophe ULg

Scientific conference (2008, February 14)

Detailed reference viewed: 6 (0 ULg)
See detailHigh-Frequency Integral Equation Solvers for Acoustic and Electromagnetic Scattering Problems
Geuzaine, Christophe ULg

Scientific conference (2008, February 29)

Detailed reference viewed: 6 (0 ULg)
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See detailHigh-frequency oscillatory ventilation in neonatal RDS: Initial volume optimization and respiratory mechanics
Kalenga, Masendu ULg; Battisti, Oreste ULg; François, A. et al

in Journal of Applied Physiology (1998), 84

Detailed reference viewed: 36 (7 ULg)
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See detailHigh-frequency ventilation in cats: technical data
Clercx, Cécile ULg; Lekeux, Pierre ULg; Degroote, A. et al

in 4th Comparative Respiratory Society meeting - Anaheim California - USA (1985)

Detailed reference viewed: 5 (1 ULg)
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See detailHigh-Grade Pleomorphic T Cell Lymphoma with Restricted Involvement of Skin and Bone Marrow
Gautier, M. S.; Pierard, Gérald ULg; Andrien, Francine ULg et al

in Dermatology : International Journal for Clinical & Investigative Dermatology (1993), 186(4), 287-9

Pleomorphic T cell lymphoma of the medium to large cell type expressing CD30 antigen is a most aggressive peripheral T cell lymphoma. Currently, there is no satisfactory treatment available for this ... [more ▼]

Pleomorphic T cell lymphoma of the medium to large cell type expressing CD30 antigen is a most aggressive peripheral T cell lymphoma. Currently, there is no satisfactory treatment available for this neoplasm. We report the case of a woman with prominent skin and bone marrow involvement without detectable lymph node localization. This unusual presentation of disease responded well to polychemotherapy combined with autologous bone marrow transplantation. [less ▲]

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See detailHigh-latitude ion transport and energetic explorer (HI-LITE): a mission to investigate ion outflow from the high-latitude ionosphere
Smith, Mark F; Herrero, Federico A; Hesse, Michael et al

in Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series (1993, July 01)

The proposed HI-LITE Explorer will investigate the global ion outflow from the high-latitude ionosphere, its relationship to auroral features, and the consequences of this outflow on magnetospheric ... [more ▼]

The proposed HI-LITE Explorer will investigate the global ion outflow from the high-latitude ionosphere, its relationship to auroral features, and the consequences of this outflow on magnetospheric processes. The unique nature of the HI-LITE Explorer images will allow temporal and spatial features of the global ion outflow to be determined. The mission's scientific motivation comes from the fundamental role high-latitude ionospheric ions play in the dynamics of the solar wind driven magnetospheric-ionospheric system. These outflows are a major source of plasma for the magnetosphere and it is believed they play an important role in the triggering of substorms. In addition this paper describes the HI-LITE spacecraft and instruments. [less ▲]

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See detailHigh-latitude nitric oxide in the lower thermosphere
Gérard, Jean-Claude ULg; Barth, C. A.

in Journal of Geophysical Research (1977), 82

High-latitude observations of fluorescent nitric oxide gamma bands were made before and during a strong magnetic storm with the Ogo 4 ultraviolet spectrometer. Brightness measurements of the (1-0) gamma ... [more ▼]

High-latitude observations of fluorescent nitric oxide gamma bands were made before and during a strong magnetic storm with the Ogo 4 ultraviolet spectrometer. Brightness measurements of the (1-0) gamma band of nitric oxide indicate a slow buildup of NO during the disturbed period. The NO column density reaches a value as high as a factor of 8 greater than the midlatitude value and shows no correlation with the brightness of the instantaneous aurora. A time-dependent model calculation indicates that the ionization and dissociation of N2 by auroral electrons can increase the NO and N(4-S) densities. This increase is dependent on the intensity and duration of the auroral precipitation and on the branching ratio of N(2-D) production by dissociation of N2. A steady state is not reached for NO until 100,000 sec in an aurora characterized by an energy flux of 10 ergs per sq cm sec. Dissociation by the solar ultraviolet radiation competes with horizontal and vertical transport as a loss process for the nitric oxide produced by the aurora. A high NO(plus)/O2(plus) ratio is to be expected in the period following a strong auroral precipitation. [less ▲]

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See detailHigh-level biosynthesis of the anteiso-C(17) isoform of the antibiotic mycosubtilin in Bacillus subtilis and characterization of its candidacidal activity.
Fickers, Patrick ULg; Guez, Jean-Sebastien; Damblon, Christian ULg et al

in Applied and Environmental Microbiology (2009), 75(13), 4636-40

High-level production (880 mg liter(-1)) and isolation of the anteiso-C(17) isoform of the lipopeptide mycosubtilin produced by a genetically engineered Bacillus subtilis strain are reported. Antifungal ... [more ▼]

High-level production (880 mg liter(-1)) and isolation of the anteiso-C(17) isoform of the lipopeptide mycosubtilin produced by a genetically engineered Bacillus subtilis strain are reported. Antifungal activity of this isoform, as determined via culture and fluorometric and cell leakage assays, suggests its potential therapeutic use as an antifungal agent, in particular against Candida spp. [less ▲]

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See detailHigh-level production of extracellular lipase by Yarrowia lipolytica mutants from methyl oleate
Darvishi, F.; Destain, Jacqueline ULg; Nahvi, I. et al

in New Biotechnology (2011), 28(6), 756-760

Detailed reference viewed: 17 (1 ULg)
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See detailHigh-order 3D Voronoi tessellation for identifying isolated galaxies, pairs and triplets
Elyiv, Andrii ULg; Melnyk, Olga ULg; Vavilova, I.

in Monthly Notices of the Royal Astronomical Society (2009), 394

A geometric method based on the high-order 3D Voronoi tessellation is proposed for identifying single galaxies, pairs and triplets. This approach allows us to select small galaxy groups and isolated ... [more ▼]

A geometric method based on the high-order 3D Voronoi tessellation is proposed for identifying single galaxies, pairs and triplets. This approach allows us to select small galaxy groups and isolated galaxies in different environments and to find the isolated systems. The volume-limited sample of galaxies from the Sloan Digital Sky Survey Data Release 5 spectroscopic survey was used. We conclude that in such small groups as pairs and triplets, segregation by luminosity is clearly observed: galaxies in isolated pairs and triplets are on average two times more luminous than isolated galaxies. We consider the dark matter content in different systems. The median values of mass-to-luminosity ratio are 12M[SUB]solar[/SUB]/L[SUB]solar[/SUB] for the isolated pairs and 44M[SUB]solar[/SUB]/L[SUB]solar[/SUB] for the isolated triplets, and 7 (8) M[SUB]solar[/SUB]/L[SUB]solar[/SUB] for the most compact pairs (triplets). We also found that systems in denser environments have greater rms velocity and mass-to-luminosity ratio. [less ▲]

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See detailHigh-Order Discrete Geometrical Models
Geuzaine, Christophe ULg

Scientific conference (2006, December 08)

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See detailHigh-Order Discrete Geometrical Models
Geuzaine, Christophe ULg

in Henrotte, F. (Ed.) Proceedings of the 3rd Advanced Computational Electromagnetics workshop (2007, June 29)

Detailed reference viewed: 5 (0 ULg)
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See detailHigh-order high-frequency integral equations
Bruno, O.; Geuzaine, Christophe ULg

in Proceedings of the 7th International Conference on Mathematical and Numerical Aspects of Waves, Waves 2005 (2005)

Detailed reference viewed: 2 (0 ULg)
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See detailHigh-order mesh generation for CFD
Toulorge, Thomas; Geuzaine, Christophe ULg; Johnen, Amaury ULg et al

Conference (2014)

Detailed reference viewed: 19 (4 ULg)
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See detailHigh-order mesh generation for CFD with aeronautical applications
Toulorge, Thomas; Geuzaine, Christophe ULg; Johnen, Amaury ULg et al

Conference (2014)

Detailed reference viewed: 17 (1 ULg)
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See detailHigh-order methods in CFD - The discontinuous Galerkin approach
Drosson, Marcus ULg

Scientific conference (2011, November 08)

Since computational fluid dynamics CFD is no longer used by only a handful of experts but has become a mainstream tool, a lot of work has been done to improve the robustness of the simulation software ... [more ▼]

Since computational fluid dynamics CFD is no longer used by only a handful of experts but has become a mainstream tool, a lot of work has been done to improve the robustness of the simulation software. Additionally besides an efficient parallelization that takes advantage of modern computer architecture, the request for high-order accuracy becomes more and more important. After a short description of the interior penalty discontinuous Galerkin method, several specific aspects of turbulent flows that affect the stability of the numerical method are discussed. The efficiency of the method is illustrated by a turbulent flat plate, a three component aerofoil and a 3D cascade flow. [less ▲]

Detailed reference viewed: 40 (4 ULg)