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See detailHigh Quality Surface Remeshing Using Harmonic Maps: Surfaces with High Genus and of Large Aspect Ratio
Remacle, J.-F.; Geuzaine, Christophe ULg; Marchandise, E.

in Proceedings of the Third Workshop on Grid Generation for Numerical Computations, Tetrahedron III (2010, September)

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See detailHigh rate monitoring CH4 production dynamics and their link with behavioral phases in cattle
Blaise, Yannick ULg; Lebeau, Frédéric ULg; Andriamandroso, Andriamasinoro ULg et al

in EAAP – 67 th Annual Meeting, Belfast 2016 (2016)

Microbial fermentation in the rumen produces methane (CH4) which is a loss of energy for ruminants and also contributes to global warming. While the respiration chamber is the standard reference for CH4 ... [more ▼]

Microbial fermentation in the rumen produces methane (CH4) which is a loss of energy for ruminants and also contributes to global warming. While the respiration chamber is the standard reference for CH4 emissions quantification, daily CH4 production dynamics can be measured only by steps of 30 min and measurements on pasture are impossible. The alternative method using SF6 as tracer gas can be applied for grazing animals but provides average CH4 production values over at least several hours, making it impossible to measure short term dynamics of rumen CH4 production with changing animal behavior along the day. Newly developed methods using CO2 as internal tracer gas extrapolate CH4 emissions from few short measurements. However, both CO2 and CH4 emissions fluctuate during the day depending on the behavior and the post-feeding times questioning the validity of this method. Therefore, an innovative device was developed to monitor at a high rate CH4 and CO2 emission dynamics in order to investigate the link between CH4 dynamics and the animal behavior on pasture. Preliminary results showed the ability of the device to record differences in CH4:CO2 ratios and eructation frequencies according to the individual and the behavior. Results from complementary experiments in barn with animals fed contrasting diets regarding CH4 production (with and without linseed) and on pasture with different forage allowance will be presented in order to highlight how post-feeding time and grazing behavior impact CO2 and CH4 emission dynamics along the day. [less ▲]

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See detailHigh reactive oxygen species in fibrotic and non-fibrotic skin of Patients with diffuse cutaneous systemic sclerosis
BOURJI, Khalil; MEYER, Alain; CHATELUS, Emmanuel et al

in Free Radical Biology & Medicine (2015), 87

Systemic Sclerosis (SSc) is a chronic multisystemic connective tissue disease characterized by progressive fibrosis affecting skin and internal organs. Despite serious efforts to unveil the pathogenic ... [more ▼]

Systemic Sclerosis (SSc) is a chronic multisystemic connective tissue disease characterized by progressive fibrosis affecting skin and internal organs. Despite serious efforts to unveil the pathogenic mechanisms of SSc, they are still unclear. High levels of Reactive Oxygen Species (ROS) in affected patients have been shown, and ROS are suggested to play a role in fibrosis pathogenesis. In this study we evaluate ROS levels in non-fibrotic and fibrotic skin of patients with SSc and we compare them with those obtained from healthy controls. Patients and Methods We enrolled 9 SSc patients fulfilling the EULAR/ACR classification criteria and 7 healthy controls. Patients included were 4 men and 5 women with mean age of 46 ±10 yrs. Controls were matched by sex and age. All patients were affected by diffuse cutaneous form of SSc and the ANA pattern anti-Scl70. Mean disease duration was 7.5±5 yrs. Skin involvement was evaluated by modified Rodnan Skin Score (mRSS). Skin samples (4 mm punch biopsy) were taken from fibrotic skin and non-fibrotic skin of patients and from healthy controls as well. To detect ROS, specimens were analyzed immediately after sampling by electron paramagnetic resonance spectroscopy. Blood samples have been drawn from all patients and controls to assess oxidative stress biomarkers. Results ROS levels (expressed as median and range, unit of measurement was nmol/l/min/mg of dry weight) were 24.7 (10.9– 47.0) in fibrotic skin, 18.7 (7.3–34.0) in non-fibrotic skin and 7.7 (3.5–13.6) in healthy controls skin. ROS levels in Fibrotic and Non-fibrotic skin of SSc patients were significantly higher than in Healthy Controls (p=0.002 and p=0.009, respectively). ROS levels in fibrotic skin were raised in comparison to non-fibrotic skin, when samples related to each patient were compared (p=0.01). ROS levels in fibrotic skin were correlated with forced vital capacity (r= -0.75, p=0.02) and erythrocyte sedimentation rate (r=0.70, p=0.04). All other clinical and lab parameters showed no significant correlation. When compared to controls, blood from SSc patients showed lower ascorbate (vitamin C) levels (8 [3.8-9.8] vs. 10.5 [9-19.1] mg/L, p=0.004) and higher lipid peroxides (873.5 [342-1973] vs. 422 [105-576] μmol/L, p=0.004). Conclusion Our results indicate the presence of high oxidative stress both in non-fibrotic skin and fibrotic skin of SSc patients, but with higher tendency in the latter. Raised ROS levels in non-fibrotic skin of SSc patients might be a hint of early involvement in skin fibrogenesis. However, a longitudinal prospective study is necessary for such proof. [less ▲]

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See detailThe high redshift of quasars
Surdej, Jean ULg

in Kleczek, J. (Ed.) Exercises in astronomy.. Revised and extended edition of "Practical work in elementary astronomy" by M. G. J. Minnaert. D. ReidelPublishing Co., Dordrecht, The Netherlands. 24+339 pp. Price Dfl. 140.00, US 64.00, £ 49.50 cloth; Dfl. 59.00, US 19.50, £ 18.00 paper (1987). ISBN 90-277-2409-1 cloth, ISBN 90-277-2423-7 paper. (1987)

This book is an updated and considerably extended version of Minnaert's work published in 1969 (01.003.051).Many new exercises referring to new observational techniques and methods have been incorporated ... [more ▼]

This book is an updated and considerably extended version of Minnaert's work published in 1969 (01.003.051).Many new exercises referring to new observational techniques and methods have been incorporated by the editor in collaboration with the contributing authors D. A. Allen, Z. Ceplechka, S. Ferraz Mello, K. J. Gordon, L. Houziaux, C. Jaschek, Z. Kopal, J. Manfroid, J. Palous, J. Podolský, G. R. Quast, J. Surdej, A. B. Underhill, J. M. Vreux, D. G. Wentzel.The exercises are organized in the following sections:A. The planetary system: 1. Space and time, instruments. 2. The motions of celestial bodies. 3. Planets and satellites.B. The stars: 1. The Sun. 2. Stars and nebulae. 3. Stellar systems. [less ▲]

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See detailHigh resolution 16 row computed tomography examination of the canine thorax
De Busscher; Bolen, Géraldine ULg; Cavrenne et al

Poster (2007)

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See detailHigh resolution 3-D imaging of void networks in plant tissues
Verboven, Pieter; Kerckhofs, Greet ULg; Cloetens, Peter et al

in Abstract book SkyScan User Meeting 2008 (2008)

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See detailHigh resolution characterization of the soil organic carbon depth profile in a soil landscape affected by erosion
Jague, Emilien; Sommer, Michael; Saby, Nicolas et al

in Soil & Tillage Research (2016), 156

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See detailHigh Resolution Electron Energy Loss Spectroscopy Investigation of the Vibrational Structure and Order of an Octadecanethiol Monolayer on Gold Substrates
Duwez, Anne-Sophie ULg; Yu, Li-Ming; Riga, Joseph et al

in Journal of Physical Chemistry B (2000), 104

The vibrational spectra induced by electron beam from octadecanethiol monolayers adsorbed on gold are reported as a contribution to study in detail the structure of the layers, through an analysis of the ... [more ▼]

The vibrational spectra induced by electron beam from octadecanethiol monolayers adsorbed on gold are reported as a contribution to study in detail the structure of the layers, through an analysis of the interaction mechanisms between the electrons and these organic ultrathin films. To show the different spatial distribution of scattered electrons from dipole and impact interactions with the monolayer, angular distributions of elastic and inelastic scattered electrons were measured for various primary energies. The absolute electron scattering loss probabilities from both dipole and impact interactions were estimated for different vibrational modes. The study of these different mechanisms was first hampered by the poor order of the layers adsorbed on evaporated gold. It became therefore highly desirable to perform the experiments on a single-crystal substrate. Using Au(111) and Au(100) single crystals as substrates, it was possible to separate the spectral response from impact and dipole interacting electrons. A negative ion resonant behavior has been observed in the energy dependence of the electron scattering differential cross sections [less ▲]

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See detailHigh Resolution Frequency Analysis as Applied ti the Singing Voice
Morsomme, Dominique ULg; Remacle, Marc; Millet, Benoite et al

Conference (1992, August 14)

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See detailHigh Resolution Frequency Analysis as applied to the singing voice
Morsomme, Dominique ULg; Remacle, Marc; Millet, Benoite

in Folia Phoniatrica (1993), 45

We have applied high-resolution vocal frequential analysis to a population of singing voices. Two important elements have become apparent: (1) Confirmation that the singing formant originates in the ... [more ▼]

We have applied high-resolution vocal frequential analysis to a population of singing voices. Two important elements have become apparent: (1) Confirmation that the singing formant originates in the resonators. This is observed especially on a low fundamental, and it is acquired through technical skill and experience (2)Observation of the vibrato, which, isolated from the clinical study, regarding only its graphic presentation, could habe been interpreted as "abnormal". [less ▲]

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See detailHigh resolution FUV observations of proton aurora
Chua, D. H.; Dymond, K. F.; Budzien, S. A. et al

in Geophysical Research Letters (2003), 30(18),

We present new FUV observations of Doppler-shifted Lyman-alpha emissions from proton aurora obtained from the High Resolution Ionospheric and Thermospheric Spectrograph ( HITS) aboard the Advanced ... [more ▼]

We present new FUV observations of Doppler-shifted Lyman-alpha emissions from proton aurora obtained from the High Resolution Ionospheric and Thermospheric Spectrograph ( HITS) aboard the Advanced Research and Global Observation Satellite (ARGOS). The HITS instrument observes the Doppler-shifted H Lyman-alpha emissions from proton precipitation with 1.5 Angstrom resolution. The high spectral resolution of these measurements allows the auroral Lyman-alpha emissions to be separated from the intense geocoronal background. The measured proton aurora Doppler spectra are modeled using a Monte Carlo simulation of proton flux transport. The forward modeling performed with this code allows us to infer the characteristic energies of the incident protons from the measured Lyman-alpha Doppler spectra. The inferred characteristics of dayside versus nightside proton precipitation are compared and used to identify the magnetospheric regions from which the particles likely originated. [less ▲]

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See detailHigh Resolution Gas Chromatography coupled to Mass Spectrometry for the analysis of volatile organic compounds
Savareear, Benjamin ULg; Brokl, M; Wright, C et al

Scientific conference (2015, September)

Detailed reference viewed: 23 (3 ULg)
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See detailHigh resolution images for statistics and urban development application to the Arlon agglomeration
Nadasdi, Istvan; Binard, Marc ULg

in Proceedings of the seminar (1997)

Detailed reference viewed: 33 (0 ULg)
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See detailHigh Resolution Imaging in 3-D Reconstructive Tomography,” Computer Graphics and Image Processing"
Verly, Jacques ULg

in Computer Graphics and Image Processing (1981)

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See detailHigh resolution imaging of Jupiter's diffuse auroral emissions inside and outside the main oval during solar minimum.
Grodent, Denis ULg

E-print/Working paper (2005)

The analysis of HST-STIS FUV images has greatly and quickly advanced our knowledge of the magnetospheric mechanisms producing the auroral emissions on the giant planets. However, these studies were ... [more ▼]

The analysis of HST-STIS FUV images has greatly and quickly advanced our knowledge of the magnetospheric mechanisms producing the auroral emissions on the giant planets. However, these studies were limited to the brightest emissions and very little has been said about the fainter emissions, mainly because of the lower S/N. We propose to image the faint auroral emissions on Jupiter which could not be observed with STIS. We will take full advantage of ACS/SBC's higher sensitivity to observe the diffuse auroral FUV emissions appearing poleward and directly equatorward of Jupiter's main auroral oval in the northern hemisphere. This proposal has the potential to reveal new magnetosphere-ionosphere coupling mechanisms especially those involving solar wind interactions with a giant planet. [less ▲]

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See detailHigh resolution infrared solar observations by balloon
Zander, Rodolphe ULg

in Infrared Physics (1976), 16

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See detailHigh resolution miospore stratigraphy of the Upper Famennian of eastern Belgium, and correlation with the conodont zonation.
Higgs, K; Prestianni, C; Streel, Maurice ULg et al

in Geologica Belgica (2013), 16(1-2), 84-94

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See detailHigh resolution modelling of the Greenland ice sheet surface mass balance using the regional climate model MAR coupled with a downscaling interface
Franco, Bruno ULg; Fettweis, Xavier ULg; Erpicum, Michel ULg

Poster (2010, November 05)

We are developing a coupling interface downscaling the 25km-atmosphere fields simulated by the regional climate MAR (Modèle Atmosphérique Régional) model onto a 5km-grid in order to resolve the surface ... [more ▼]

We are developing a coupling interface downscaling the 25km-atmosphere fields simulated by the regional climate MAR (Modèle Atmosphérique Régional) model onto a 5km-grid in order to resolve the surface processes at high resolution with the SISVAT (Sea Ice Soil Vegetation Atmosphere Transfer) snow-ice module. This coupling interface improves the representation of the topography and ablation zone of the Greenland ice sheet (GrIS) in the MAR model, and therefore will provide higher resolution estimations of the GrIS surface mass balance (SMB) without additional computing time. By using outputs from previously-gauged global circulation models (GCM) as forcing fields, the MAR model coupled with the downscaling interface will then perform 5km future simulations of the GrIS SMB for different IPCC greenhouse gas emissions scenarios for the 21st century. [less ▲]

Detailed reference viewed: 40 (6 ULg)