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See detailA detailed census of variable stars in the globular cluster NGC 6333 (M9) from CCD differential photometry
Arellano Ferro, A.; Bramich, D. M.; Figuera Jaimes, R. et al

in Monthly Notices of the Royal Astronomical Society (2013), 434

We report CCD V and I time series photometry of the globular cluster NGC 6333 (M9). The technique of difference image analysis has been used, which enables photometric precision better than 0.05 mag for ... [more ▼]

We report CCD V and I time series photometry of the globular cluster NGC 6333 (M9). The technique of difference image analysis has been used, which enables photometric precision better than 0.05 mag for stars brighter than V ˜ 19.0 mag, even in the crowded central regions of the cluster. The high photometric precision has resulted in the discovery of two new RRc stars, three eclipsing binaries, seven long-term variables and one field RRab star behind the cluster. A detailed identification chart and equatorial coordinates are given for all the variable stars in the field of our images of the cluster. Our data together with the literature V-data obtained in 1994 and 1995 allowed us to refine considerably the periods for all RR Lyrae stars. The nature of the new variables is discussed. We argue that variable V12 is a cluster member and an Anomalous Cepheid. Secular period variations, double-mode pulsations and/or the Blazhko-like modulations in some RRc variables are addressed. Through the light-curve Fourier decomposition of 12 RR Lyrae stars we have calculated a mean metallicity of [Fe/H][SUB]ZW[/SUB] = -1.70 ± 0.01(statistical) ± 0.14(systematic) or [Fe/H]_{text{UVES}}=-1.67 ± 0.01(statistical) ± 0.19(systematic). Absolute magnitudes, radii and masses are also estimated for the RR Lyrae stars. A detailed search for SX Phe stars in the Blue Straggler region was conducted but none were discovered. If SX Phe exist in the cluster then their amplitudes must be smaller than the detection limit of our photometry. The colour-magnitude diagram has been corrected for heavy differential reddening using the detailed extinction map of the cluster of Alonso-García et al. This has allowed us to set the mean cluster distance from two independent estimates; from the RRab and RRc absolute magnitudes, we find 8.04 ± 0.19 and 7.88 ± 0.30 kpc, respectively. [less ▲]

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See detailDetailed flood extension forecasting in the Walloon region with a 2D finite volume multiblock free surface flow solver
Erpicum, Sébastien ULg; Archambeau, Pierre ULg; Detrembleur, Sylvain ULg et al

in Proceedings of the 4th International Conference on Advanced Computational Methods in Engineering (2008)

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See detailDetailed inundation modelling using high resolution DEMs
Erpicum, Sébastien ULg; Dewals, Benjamin ULg; Archambeau, Pierre ULg et al

in Engineering Applications of Computational Fluid Mechanics (2010), 2(4), 196-208

With the availability of high resolution DEMs, relevant and detailed inundation maps may now be routinely computed provided that suited flow models are available. The full 2D flow model presented in this ... [more ▼]

With the availability of high resolution DEMs, relevant and detailed inundation maps may now be routinely computed provided that suited flow models are available. The full 2D flow model presented in this paper has been used to compute such maps on 800 km of the main rivers of the Walloon Region in Belgium. The use of grid spacing of 1 m, similar to the DEM resolution, enables to accurately predict the pattern of flood depth. This is confirmed by several application examples, which also demonstrate the ability of the model to reproduce depth measurements for a wide range of flood discharges without the need for recalibration of the roughness coefficient. The numerical model has been systematically validated by comparison with observations during recent real flood events. It shows a very good agreement with field data, in particular regarding free surface elevations and inundation extension. [less ▲]

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See detailA detailed kinetic study of Mox-1, a plasmid-encoded class C beta-lactamase
Alba, J.; Bauvois, C.; Ishii, Y. et al

in FEMS Microbiology Letters (2003), 225(2), 183-188

Surveys of beta-lactamases in different parts of the world show an important increase in class C beta-lactamases, thus the study of these enzymes is becoming an important issue. We created an ... [more ▼]

Surveys of beta-lactamases in different parts of the world show an important increase in class C beta-lactamases, thus the study of these enzymes is becoming an important issue. We created an overproduction system for Mox-1, a plasmid class C beta-lactamase, by cloning the gene encoding this enzyme, and placing it under the control of a T7 promoter, using vector pET 28a. The enzyme, purified by ion exchange chromatography, was used to obtain the molecular mass (38 246), the N-terminal sequence (GEASPVDPLRPVV), and p/ (8.9), and to perform a detailed kinetic study. Cephalotin was used as reporter substrate in the case of poor substrates. The kinetic study showed that benzylpenicillin, cephalotin, cefcapene and moxalactam were good substrates for Mox-1 (k(cat)/K-m values > 2.5 x 10(6) M-1 s(-1)). On the other hand, ceftazidime and cefepime were poor substrates for this enzyme (K-m values > 200 muM). Clavulanic acid had no inhibitory effect on Mox-1 (K-m = 30.2 mM), however aztreonam behaved as an inhibitor of Mox-1 (K-i = 2.85 muM). (C) 2003 Federation of European Microbiological Societies. Published by Elsevier B.V. All rights reserved. [less ▲]

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See detailDetailed Line-Profile Modeling of B Stars with Chemical Inhomogeneities
Briquet, Maryline ULg; Scuflaire, Richard ULg; Aerts, C. et al

in Radial and Nonradial Pulsations as Probes of Stellar Physics (2001, July)

We report monoperiodic variablitity for the four B-type stars HD 131120, HD 105382, HD 138769 and HD 55522, which we explain by rotational modulation rather than by pulsation. Consequently these variables ... [more ▼]

We report monoperiodic variablitity for the four B-type stars HD 131120, HD 105382, HD 138769 and HD 55522, which we explain by rotational modulation rather than by pulsation. Consequently these variables are removed from the list of candidate slowly pulsating B stars. [less ▲]

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See detailDetailed Line-Profile Modeling of B Stars with Chemical Inhomogeneities
Briquet, Maryline ULg; Scuflaire, Richard ULg; Aerts, C. et al

in Radial and Nonradial Pulsations as Probes of Stellar Physics, ASP Conference Proceedings, Vol. 259. Edited by Conny Aerts, Timothy R. Bedding, and Jørgen Christensen-Dalsgaard. Also IAU Colloquium 185. San Francisco: Astronomical Society of the Pacific, 2002., p.266 (2002)

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See detailDetailed mapping of Santonian-Maastrichtian formations in northeast Wallonia, Belgium
Mottequin, Bernard ULg; Ghysel, Pierre; Laloux, Martin et al

in Jagt, John W. M.; Jagt-Yazykova, Elena A. (Eds.) The Maastrichtian Stage; the current concept. Workshop programme, abstracts and field guide (2012, September 06)

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See detailDetailed Mathematical Modeling of Metabolic and Regulatory Networks
Sauter, T.; Bullinger, Eric ULg

in BIOforum Europe (2004), 2004(2), 62--64

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See detailDetailed profiles : Guidance counsellor
Broonen, Jean-Paul ULg

in Wouters, C. (Ed.) New skills for vocational guidance in higher education : Belgium, French Community (1998)

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See detailDetailed results of the experimental tests - Deliverable D.5a - Robustimpact
Hoffmann, Nadine; Kuhlmann, Ulrike; Vanvinckenroye, Hélène ULg et al

Report (2016)

At the Institute for Steel Structures crash tests on columns were carried out to investigate the dynamic response of the member during the impact as well as the dynamic interaction of the member with the ... [more ▼]

At the Institute for Steel Structures crash tests on columns were carried out to investigate the dynamic response of the member during the impact as well as the dynamic interaction of the member with the surrounding structure. The tests' campaign planned by the Università degli Studi di Trento comprises of: - two full-scale tests on 3D specimens representative of the reference buildings; From two reference structures selected as cases study two representative substructures characterised by the same overall dimensions but by a symmetric and an asymmetric configuration (i.e., column layout), respectively, have been identified. The substructures, built in laboratory, are tested reproducing the collapse of a central column. The aim of the tests is to investigate the influence of the biaxial membrane effect associated with the concrete slab in a framed structure when the collapse of a column happens. - 20 tensile tests on T-stubs related to the beam-to-column joint adopted in the reference structures and in the full-scale specimens. T-stubs associated to both the column (10 specimens) and the end-plate (10 specimens) are tested. The tests are performed at two different loading speeds aiming at investigating the influence of strain rate effects on the joint performance, with particular reference to the deformation capacity. As a reference, also quasi-static tests are planned. At the Institute of Structural Design experimental tests were carried out investigating the behaviour of 2D-frames under a column loss. In addition the behaviour of composite joints under high speed loading was examined. Within the framework of the project, two tests on composite frames were tested as well as four tests on composite joints. The 2D substructure tests planned at USTUTT have the objective to evaluate the benefit of the concrete slab compared to the behaviour of the composite frame structure concerning the development of a membrane effect. For this purpose, the results of the composite frame tests will be compared to the 3D substructure tests performed at UTRE. Therefore, the test specimens of the 2D substructure tests are adapted to the 3D substructure tests. In order to compare also the results of the composite joint tests to the behaviour of the frames and to observe the influence of the joints on each other the test specimens for the joint tests are also adapted to the frame tests. Experimental impact tests were planned at the University of Liege (ULg): 22 tests on beam-to-column joints with 5 different joint configurations and 22 tests on column base joints with 4 different joint configurations. One of the objectives of the performed study was to propose realistic joints and column bases which could fit with the laboratory facilities of ULg, what induced a downscaling of the dimension of the members in comparison to the dimension of the ones met in the reference building. With the designed specimens, it is possible to investigate the response of different joint components under impact loading, for different levels of energy (small, medium and high levels), and to compare this response to the one obtained through a static test to highlight the dynamic effects. These static tests are performed for each type of specimens and will be used to clearly determine the different level of energy to be used for the impact tests. The general test setup for all tests was derived in Work Package 3 and can be found in the deliverable D.4.1 [18] of the project. [less ▲]

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See detailDetailed sedimentological study and magnetic susceptibility of and Eifelian mixed ramp-related system in the Eifel area
Pas, Damien ULg; Mabille, Cédric; Aretz, Markus et al

in Geologica Belgica (2010, December), 13(4),

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See detailDetailed sedimentological study of a non-classical succession for Trois-Fontaines and Terres d'Haurs formations (Lower Givetian, Marenne, Belgium)- Introduction of the Marenne Member
Mabille, Cédric ULg; De Wilde, Clotilde ULg; Hubert, Benoît et al

in Geologica Belgica (2008), 11

This work details for the first time the sedimentology of the Marenne quarry. It exposes a remarkable succession of strata from the Trois-Fontaines Formation and the base of the Terres d’Haurs Formation ... [more ▼]

This work details for the first time the sedimentology of the Marenne quarry. It exposes a remarkable succession of strata from the Trois-Fontaines Formation and the base of the Terres d’Haurs Formation. Two sections (Marenne East and Marenne Centre) are investigated within the quarry. The first one (115 metres) covers both formations and is characterized by a mixed carbonate-siliciclastic succession replacing the classical base of the Trois-Fontaines Formation. We propose here to include these particular facies into a new member of the Trois-Fontaines Formation, the Marenne Member. The second one (48 metres) exposes a reefal lens also attributed to this new Marenne Member. Magnetic susceptibility was used to confirm geometric correlations previously obtained between these two sections. Petrographic study leads to the definition of 14 microfacies which are integrated into three palaeoenvironmental models. The first model (six microfacies) is proposed for the Marenne Member. In this ramp model, terrigenous inputs are particularly important. The mid-ramp is composed of four microfacies more or less influenced by storm events. The inner ramp (limited to the FWWB vicinity) is characterized by the development of the reefal lens and by peloidal microfacies. The upper part of Trois-Fontaines Formation is depicted by a back-reef model (three microfacies) which is mainly dominated by lagoons. However, intermittent agitation and non-restricted settings allow the local development and the reworking of branching organisms. The last model proposed (five microfacies) concerns the Terres d’Haurs Formation and corresponds to a ramp profile with the development of shoals. Those shoals locally protect semi-restricted lagoons. Algal mats are also observed. The last part of the work concerns the sedimentary dynamics and proposes sea level variations as the key parameter probably responsible for the succession of these three depositional settings. [less ▲]

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See detailDetailed Seismic Hazard Assessment for The Central Tien Shan, Kyrgyzstan
Lamair, Laura ULg; Havenith, Hans-Balder ULg; Abdrakhmatov, K

Poster (2012, August 23)

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See detailDetailed Study of a Molecule in a Molecule N-Acetyl-L-Tryptophanamide in a Active-Site Model of Alpha-Chymotrypsin
Dive, Georges ULg; Dehareng, Dominique ULg; Ghuysen, Jean-Marie ULg

in Journal of the American Chemical Society (1994), 116(6), 2548-2556

Six complexes between a model active site of alpha-chymotrypsin (261 atoms) and N-acetyl-L-tryptophanamide (33 atoms) were optimized at the semiempirical AM1 level. In one of these complexes, a water ... [more ▼]

Six complexes between a model active site of alpha-chymotrypsin (261 atoms) and N-acetyl-L-tryptophanamide (33 atoms) were optimized at the semiempirical AM1 level. In one of these complexes, a water molecule was included. A detailed study at the geometric and energetic levels is presented. The discussion deals with the nature of the interaction, the effect of the environment, the ligand deformation, the backbone relaxation, the water molecule freedom, and the comparison with the molecular mechanics results. [less ▲]

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See detailDetailed study on groundwater pollution by bentazone in the Walloon Region, Belgium
Limbourg, Quentin; Mattern, Samuel; Hallet, Vincent et al

Report (2010)

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See detailA detailed X-ray investigation of ζ Puppis. I. The dataset and some preliminary results
Nazé, Yaël ULg; Flores, C. A.; Rauw, Grégor ULg

in Astronomy and Astrophysics (2012), 538

<BR /> Aims: One of the closest and brightest massive stars, ζ Puppis, was the first early-type object observed by the current generation of X-ray observatories. These observations provided some ... [more ▼]

<BR /> Aims: One of the closest and brightest massive stars, ζ Puppis, was the first early-type object observed by the current generation of X-ray observatories. These observations provided some surprising results, partly confirming the theoretical predictions while simultaneously unveiling some problematic mismatches with expectations. In this series of papers, we perform a thorough study of ζ Puppis in X-rays, using a decade of XMM-Newton observations. <BR /> Methods: The star ζ Puppis was observed 18 times by XMM-Newton, totaling 1 Ms in exposure. This provides the highest quality high-resolution X-ray spectrum of a massive star to date, as well as a perfect dataset for studying X-ray variability in an "archetype" object. <BR /> Results: This first paper reports on the data reduction of this unique dataset and provides a few preliminary results. On the one hand, analysis of EPIC low-resolution spectra shows the star to have a remarkably stable X-ray emission from one observation to the next. On the other hand, fitting by a wind model of individual line profiles recorded by RGS confirms the wavelength dependence of the line morphology. Based on observations collected with XMM-Newton, an ESA Science Mission with instruments and contributions directly funded by ESA Member States and the USA (NASA).Table 1 is available in electronic form at <A href="http://www.aanda.org">http://www.aanda.org</A> [less ▲]

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