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See detailSite effect analysis around the seismically induced Ananevo, Rockslide, Kyrgyzstan
Havenith, Hans-Balder ULiege; Jongmans, D.; Faccioli, E. et al

in Bulletin of the Seismological Society of America (2002), 92(8), 3190-3209

In 1911, the surface-wave magnitude 8.2 Kemin earthquake hit northeastern Tien Shan (Kyrgyzstan), close to the cities of Bishkek and Almaty, the capitals of Kyrgyzstan and Kazakhstan, respectively ... [more ▼]

In 1911, the surface-wave magnitude 8.2 Kemin earthquake hit northeastern Tien Shan (Kyrgyzstan), close to the cities of Bishkek and Almaty, the capitals of Kyrgyzstan and Kazakhstan, respectively. Several hundreds of people were killed by the earthquake, some by indirect effects such as landslides and mudflows. A particular but nonfatal landslide triggered by the Kemin event was a rockslide in the vicinity of Ananevo, north of lake Issyk Kul (Kyrgyzstan) rockslide located above the fault zone activated in 1911. In the summer of 1999, a geophysical-seismological field trip was organized to study geology and to record seismic ground motions on and around the Ananevo rockslide. The work was part of project assessing seismogenic landslide hazard in northern Kyrgyzstan, based on various case studies of slope failures in connection with site-specific ground-motion dynamics. The geophysical investigations consisted of seismic refraction tests processed as 2D seismic tomographies and surface-wave inversion, which were combined to build a 3D geophysical model of the landslide site. Ground motions from small earthquakes were analyzed using several techniques to define site effects over the mountain massif. Both H/V and standard spectral ratios indicated lower dominant frequencies with stronger amplification in the crest region with respect to the mountain slope. These effects could be partially simulated by I D, 2D, and 3D finite-element modeling. By comparing the numerical results with the experimental data, the presence of a surficial low-velocity layer of varying thickness appeared to be the key factor controlling the ground motion around the rockslide. [less ▲]

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See detailThe in situ formation of a new initiator system for the syndiotactic anionic polymerization of methyl methacrylate in toluene at 0°C
Zundel, Thomas; Teyssié, Philippe; Jérôme, Robert ULiege

in Polymer (2002), 43(25), 7191-7193

This paper reports on an efficient 'in-situ' one pot synthesis of an initiatior/ligand adduct, which can be used to initiate the anionic polymerization of methyl methacrylate in toluene at 0 °C ... [more ▼]

This paper reports on an efficient 'in-situ' one pot synthesis of an initiatior/ligand adduct, which can be used to initiate the anionic polymerization of methyl methacrylate in toluene at 0 °C. Predominantly syndiotactic PMMA is formed. [less ▲]

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See detailThe north-eastern Polish anorthosite massifs: petrological, geochemical and isotopic evidence for a crustal derivation
Wiszniewska, Janina; Claesson, Stefan; Stein, Holly et al

in Terra Nova (2002), 14(6), 451-460

Deeply buried 1.5 Ga Polish anorthosites, accessible only by bore holes, reveal diagnostic features of some massif-type anorthosites (polybarism, jotunitic parent magma), diapirically emplaced in the mid ... [more ▼]

Deeply buried 1.5 Ga Polish anorthosites, accessible only by bore holes, reveal diagnostic features of some massif-type anorthosites (polybarism, jotunitic parent magma), diapirically emplaced in the mid crust together with the rapakivi granites of the EW-trending Mazury complex, intruded along a major crustal discontinuity. Geochemical modelling and isotope data corroborate recent experimental work on the basaltic system in dry conditions: the source rock of the parental magma is a gabbronorite, necessarily lying in the lower crust. Since no Archaean crust is known in the region, high initial Os-188/Os-187 ratios for sulphide-oxide isochrons and negative epsilon(Nd) values are best accounted for by melting a similar to 2.0 Ga mafic crust. [less ▲]

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See detailOn the Model Validation in Nonlinear structural Dynamics,
Kerschen, Gaëtan ULiege

Doctoral thesis (2002)

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See detailActive-site mutants of class B beta-lactamases: substrate binding and mechanistic study
Prosperi-Meys, C.; De Seny, Dominique ULiege; Llabres, Gabriel ULiege et al

in Cellular & Molecular Life Sciences (2002), 59(12), 2136-2143

Increased resistance to beta-lactam antibiotics is mainly due to beta-lactamases. X-ray structures of zinc beta-lactamases unraveled the coordination of the metal ions, but their mode of action remains ... [more ▼]

Increased resistance to beta-lactam antibiotics is mainly due to beta-lactamases. X-ray structures of zinc beta-lactamases unraveled the coordination of the metal ions, but their mode of action remains unclear. Recently, enzymes in which one of the zinc ligands was mutated have been characterized and their catalytic activity against several beta-lactam antibiotics measured. A molecular modeling study of these enzymes was performed here to explain the catalytic activity of the mutants. Coordination around the zinc ions influences the way the tetrahedral intermediate is bound; any modification influences the first recognition of the substrate by the enzyme. For all the studied mutants, at least one of the interactions fails, inducing a loss of catalytic efficiency compared to the wild type. The present studies show that the enzyme cavity is a structure of high plasticity both structurally and mechanistically and that local modifications may propagate its effects far from the mutated amino acid. [less ▲]

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See detailLe Secret des Géants
Beckers, Albert ULiege

Scientific conference (2002, December)

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See detailSynthesis of CMR manganate compounds: the consequences of the choice of a precursor method
Vertruyen, Bénédicte ULiege; Rulmont, André ULiege; Cloots, Rudi ULiege et al

in Materials Letters (2002), 57(3), 598-603

We have studied the electrical transport properties of manganate samples synthesized by different precursor methods. Differences in the synthesis process of the materials can result in samples with ... [more ▼]

We have studied the electrical transport properties of manganate samples synthesized by different precursor methods. Differences in the synthesis process of the materials can result in samples with similar grain size but very different physical properties, contrary to what happens in samples prepared by the same method. (C) 2002 Elsevier Science B.V. All rights reserved. [less ▲]

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See detailL'Intérêt herpétologique des gares de triage de l'Entre-Sambre-et-Meuse (Belgique)
Graitson, Eric ULiege

in Natura Mosana (2002), 55(4), 63-69

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See detailUse of simulation in the commissioning of an office building
Andre, Philippe ULiege; Lacôte, P.; Adam, Ch. et al

in Proceedings of SSB'2002 congress (2002, December)

In the frame of two successive IEA-ECBCS annexes, the « CA-MET » building in Namur was the object of commissioning and re-commissioning activities. First, during the construction of the building and ... [more ▼]

In the frame of two successive IEA-ECBCS annexes, the « CA-MET » building in Namur was the object of commissioning and re-commissioning activities. First, during the construction of the building and installation of the HVAC plant, a systematic survey of the work was carried out in the frame of IEA Annex 34 (“Fault Detection”). Therefore, attention was paid to a specific part of the plant (a typical Air handling Unit) and a number of testing and verifications were performed, as a complement to the normal and ongoing commissioning activities: - testing and balancing of air and water networks - air flowrate measurements - water flowrate measurements - control system analysis The most important faults identified in this part of the project were classified according to the IEA 34 template and, for each of these faults, the possibility of developing an automatic fault detection method was analysed. The paper will report on the most relevant problems and present the automatic fault detection method proposed. In a second step, which occurred during in the early stages of the operational phase of the building, a further verification of specific subsystems was carried out, as part of a re-commissioning activity. This work is being realized in the frame of IEA Annex 40 and ends up with a proposal of systematic verification procedure to be applied, as a first example, to a VAV system. This procedure follows a hierarchical approach (bottom-up), starting with the local VAV loop, going through the AHU and ending with the chilled water production equipment. The paper reports on the application of the procedure to the selected building and will be based upon experimental results obtained during target monitoring campaigns. [less ▲]

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See detailSimulation of a non conventional HVAC plant in an experimental building devoted to artificial fog production.
Andre, Philippe ULiege; Boreux, Jean-Jacques ULiege; Lacôte, P. et al

in Proceedings of SSB'2002 Congress (2002, December)

In the frame of a european project dealing with the issue of transport safety improvement in fog conditions, a new experimental building is being constructed on the FUL campus, in the southern part of ... [more ▼]

In the frame of a european project dealing with the issue of transport safety improvement in fog conditions, a new experimental building is being constructed on the FUL campus, in the southern part of Belgium. This building hosts a climatic chamber in which a given indoor climate is to be maintained (temperature and relative humidity) whatever the external climate. Control of the internal climate will be performed by means of a specific HVAC plant. The general environmental context of the project led to the selection of non conventional solutions for the plant: solar collectors (both thermal and photovoltaic) are associated with a reversible heat pump in order to either heat or cool the building. In some circumstances, simultaneous heating and cooling of different rooms of the building will be necessary and possible. Energy distribution within the building will be made possible by different systems: - floor heating and/or cooling - cooling or heating ceiling - ventilation and Air handling Unit The paper reports on the use of building and HVAC system simulation in order to support the design of the plant. Simulation is carried out in the TRNSYS environment and gathers the following components: building, reversible heat pump, thermal solar collectors, photovoltaic solar collectors, floor heating, cooling ceiling, Air Handling Unit, storage tanks. Parameters identification for the different components will be developed. The paper will focus on specific problems connected to the simultaneous control of both temperature and relative humidity in situation close to the saturation state. The whole design methodology will be situated in the general context of the building life cycle and will make use of some ideas presented in the IEA Annex 30 research project. [less ▲]

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See detailIce storage system (ISS) : phase change modelling (TRNSYS 15). Simulation of a typical HVAC primary plant equipped with an ice sotrage unit.
Adam, Ch.; Andre, Philippe ULiege

in Proceedings of SSB'2002 congress (2002, December)

An ice storage can be an interesting option in a HVAC plant. It reduces the electricity costs and increases the HVAC plant capabilities. ISS reduces the on-peak power and shifts the cooling demand from ... [more ▼]

An ice storage can be an interesting option in a HVAC plant. It reduces the electricity costs and increases the HVAC plant capabilities. ISS reduces the on-peak power and shifts the cooling demand from the on-peak hours to the off-peak hours. ISS increases the available HVAC plant power, and then, the internal comfort. To store cold energy requires the selection of operating strategies. The objective of these strategies is to meet the global cooling demand of the building. Each strategy offers different technical and economical characteristics. The typical questions the manager of an HVAC plant has to solve are: Which is optimal ice storage tank in my case? Which cooling power? Which cooling capacity? How to run the HVAC plant to minimize the cost? To compare objectively the strategies, the manager needs to reproduce the ISS performances for the same conditions (building, cooling and electrical demands, climate conditions,...). He needs also informations to chose the appropriate plant configuration or operating strategy to meet the global cooling demand taking into account the characteristics of the tank, of the demand curve,... at each moment. A simulation model of an entire HVAC primary plant should provide this information. [less ▲]

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See detailStudy of color centers induced by PIXE irradiation
Absil, J.; Garnir, Henri-Pierre ULiege; Strivay, David ULiege et al

in Nuclear Instruments & Methods in Physics Research. Section B, Beam Interactions with Materials and Atoms (2002), 198(1-2), 90-97

The particle induced X-ray emission method is perfectly adapted to the study, by external beam, of art objects (like paintings) and allows non-destructive analysis of the atomic composition of the target ... [more ▼]

The particle induced X-ray emission method is perfectly adapted to the study, by external beam, of art objects (like paintings) and allows non-destructive analysis of the atomic composition of the target. However, a strange phenomenon occurs during irradiation on some pigments: dark brownish stains appear, and this could be due to the formation of color centers. In fact, these darkening spots progressively fade out and disappear after a few weeks. Heat and UV light accelerate the decreasing process. The aim of this study is to understand the physical processes of the stain creation and to find a way to make stains disappear, avoiding any damage for the painting. (C) 2002 Elsevier Science B.V. All rights reserved. [less ▲]

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See detailApplication of Supercritical carbon dioxide for the preparation of drug-cyclodextrin inclusion compounds
Van Hees, Thierry ULiege; Barillaro, Valery; Piel, Géraldine ULiege et al

in Journal of Inclusion Phenomena and Macrocyclic Chemistry (2002), 44(1-4), 271-274

Inclusion complexes of drugs into cyclodextrins (CDs) can be obtained at the solid state by means of supercritical dioxide (SCCO2). A successful inclusion with a yield >98.5% has been achieved with ... [more ▼]

Inclusion complexes of drugs into cyclodextrins (CDs) can be obtained at the solid state by means of supercritical dioxide (SCCO2). A successful inclusion with a yield >98.5% has been achieved with piroxicam and beta-CD. The temperature and the time of exposure to SCCO2 have a significant effect on the inclusion yield while the pressure has a negative effect. However, there is a strong interaction between temperature and pressure and this interaction has a positive influence. The molar ratio piroxicam-beta-CD and the addition of ternary alkaline agents were also found to be significant factors. The dissolution rate of the complexes formed using SCCO2 was found to be significantly higher than that of the physical mixture. Inclusion complexes have also been obtained with miconazole treating mixtures of miconazole, CDs and citric acid by SCCO2. This new technique of inclusion of poorly soluble drugs into CDs allows the preparation of solid complexes without using organic solvents and thus without residues. [less ▲]

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See detailCrédit hypothécaire et branche 23
Biquet, Christine ULiege

in Actualités législatives en droit immobilier (2000-2002) (2002)

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See detailDiel activity of Sarpa salpa (Sparidae) by ultrasonic telemetry in a Posidonia oceanica meadow of Corsica (Mediterranean Sea)
Jadot, Catherine; Ovidio, Michaël ULiege; Voss, Jacques ULiege

in Aquatic Living Resources (2002), 15(6), 343-350

In the Mediterranean Sea, the fish Sarpa salpa (Sparidae) is the only vertebrate grazer of Posidonia oceanica meadows. In order to gain knowledge about the behaviour of S. salpa and a better understanding ... [more ▼]

In the Mediterranean Sea, the fish Sarpa salpa (Sparidae) is the only vertebrate grazer of Posidonia oceanica meadows. In order to gain knowledge about the behaviour of S. salpa and a better understanding of the meadow's primary production recycling, an original study was designed using ultrasonic telemetry to investigate activity patterns and space utilisation in the field. During June-September 2000, we compared diel movements of, six adult S. salpa (249-317 nim FL and 313-633 g) in the Bay of Calvi. These fish were tagged by intraperitoneal insertion of ultrasonic transmitters. Their positions were recorded with a directional hydrophone from a small boat with an accuracy between 10 and 50 m, depending on the local environment. The tracking duration ranged from 3 to 22 days (average 11.8 +/- 7.3). Locations were performed from at least dawn to dusk or early night, and one fish was tracked during the entire 24-h cycle. Fish were more mobile during the twilight periods, but statistical analysis indicated individual differences for the precise period of mobility. Two major behavioural patterns were observed: first, the fish remained in close vicinity of the harbour during the day and moved away to the north or the south at dusk to access nocturnal sites, occupying a home range of about 4.3 ha. The second behavioural pattern involved persistent occupation of the same sites during day and night within a relatively restricted home range (about 0.8 ha). Great variation in mobility was found and the same individual fish could show both kinds of behaviour. (C) 2002 Ifremer/CNRS/Inra/IRD/Cemagref/Editions scientifiques et medicales Elsevier SAS. All rights reserved. [less ▲]

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See detailModèle coût de Production - Report R&D2
Rigo, Philippe ULiege

Report (2002)

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See detailEquivariant symbol calculus for differential operators acting on forms
Boniver, Fabien; Hansoul, Sarah ULiege; Mathonet, Pierre ULiege et al

in Letters in Mathematical Physics (2002), 62(3), 219-232

We prove the existence and uniqueness of a projectively equivariant symbol map (in the sense of Lecomte and Ovsienko) for the spaces D_p of differential operators transforming p-forms into functions, over ... [more ▼]

We prove the existence and uniqueness of a projectively equivariant symbol map (in the sense of Lecomte and Ovsienko) for the spaces D_p of differential operators transforming p-forms into functions, over R^n. As an application, we classify the Vect(M)-equivariant maps from D_p to D_q over a smooth manifold M, recovering and improving earlier results of N. Poncin. This provides the complete answer to a question raised by P. Lecomte about the extension of a certain intrinsic homotopy operator. [less ▲]

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