References of "2000"
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See detail"L'enregistrement des entrepreneurs sous son aspect solidarité"
Moreau, Pierre ULg

in Le point sur le droit des sûretés (2000)

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See detailAdaptive Applications over Active Networks: Case Study on Layered Multicast
Yamamoto, Lidia; Leduc, Guy ULg

in IP Networks Versus conventional Switched Networks (2000, October)

In this paper we study the potential and limitations of active networks in the context of adaptive applications. We present a survey of active networking research applied to adaptive applications, and a ... [more ▼]

In this paper we study the potential and limitations of active networks in the context of adaptive applications. We present a survey of active networking research applied to adaptive applications, and a case study on a layered multicast active application. This active application is a congestion control protocol that selectively discards data in the active routers, and prunes multicast tree branches affected by persistent congestion. Our first results indicate that active networks can indeed help such an application to adapt to heterogeneous receivers, with a minimum amount of state overhead, equivalent to that of a single IP multicast group. [less ▲]

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See detailLe cas clinique du mois. A propos d'une presentation inhabituelle de syndrome cave superieur
Monami, Catherine; Martinez, Christophe ULg; Ghuysen, Alexandre ULg et al

in Revue Médicale de Liège (2000), 55(10), 905-9

We report the case of a 48-year-old man who was admitted to our emergency department because of a superior vena caval syndrome from which the symptoms occurred only during exercise. His past history ... [more ▼]

We report the case of a 48-year-old man who was admitted to our emergency department because of a superior vena caval syndrome from which the symptoms occurred only during exercise. His past history included an episode of lower limb deep venous thrombosis. Because an atrio-ventricular partial block was fortuitously evidenced, the patient was submitted to a pacemaker insertion. A few years later, the patient suffered from rapid dyspnea on exercise, associated with facial cyanosis and systemic hypotension. The exploration by phlebography evidenced that the inferior vena cava was completely obstructed. Therefore the venous return from the lower part of the body to right heart was obtained through hypertrophy of the vena azygos. In addition, the presence of cardiac pacing electrodes induced a stenosis at the level of the superior vena cava, just before its entrance into the right atrium. Such a venous network accounted for the occurrence of a chronic superior vena caval syndrome associated with peripheral arterial hypotension during exercise. Treatment consisted of a superior vena caval percutaneous transluminal balloon angioplasty followed by a Wallstent insertion. This procedure led to a correction of all hemodynamic abnormalities responsible for reported pathophysiological limitations to stress. [less ▲]

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See detail2-(2-Oxoimidazolidinyl)Ethyl 2-Methylprop-2-Enoate
Spirlet, Marie-Rose ULg; Desreux, Jean-François ULg; Riondel, A. et al

in Acta Crystallographica Section C-Crystal Structure Communications (2000), 56((Pt 10)), 1258-9

In the crystal structure of the title compound, C(9)H(14)N(2)O(3), the molecules are linked by N-H.O=C bonds into chains parallel to [001]. Large crystals are readily obtained, presumably because of the ... [more ▼]

In the crystal structure of the title compound, C(9)H(14)N(2)O(3), the molecules are linked by N-H.O=C bonds into chains parallel to [001]. Large crystals are readily obtained, presumably because of the hydrogen bonds and an energetically stable conformation of the molecule. [less ▲]

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See detailComparative Evaluation of Four Detectors in the High-Performance Liquid Chromatographic Analysis of Chiral Nonaromatic Alcohols
Toussaint, B.; Duchateau, A. L.; van der Wal, S. et al

in Journal of Chromatographic Science (2000), 38(10), 450-7

A comparative evaluation of ultraviolet, polarimetric, refractive index, and evaporative light-scattering detection coupled with high-performance liquid chromatography has been developed for the ... [more ▼]

A comparative evaluation of ultraviolet, polarimetric, refractive index, and evaporative light-scattering detection coupled with high-performance liquid chromatography has been developed for the separation and quantitation of the enantiomers of chiral nonaromatic alcohols, some of which are intermediates in the synthesis of chiral drugs. (R,S)-3-tert-butylamino-1,2-propanediol; (R,S)-glycidol; and (R,S)-1-(4-morpholino)-2-octanol are selected as model compounds in order to compare the detection sensitivity and the linearity of the response with the four detectors. Separation of the enantiomers is performed using chiral stationary phases in normal-phase liquid chromatography. A one-day validation is achieved for (S)-3-tert-butylamino-1,2-propanediol with each detector, and limits of quantitation are determined for the three compounds. Advantages and limitations of the four detectors are discussed. [less ▲]

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See detailMulticriteria and multiactors aspects of an interactive tool aiding to sketch the building envelope during the first stages of the architectural design
Hauglustaine, Jean-Marie ULg

Conference (2000, October)

The main objective of the present study is to introduce a rational method of aiding to design the envelope of a building, during the sketch design. The design method has for both objectives the respect of ... [more ▼]

The main objective of the present study is to introduce a rational method of aiding to design the envelope of a building, during the sketch design. The design method has for both objectives the respect of building costs (for the construction itself and in use), and the improvement of the energy performance. In the multicriteria and multiactors context, this interactive tool is using decision-making aids, in order to improve the architectural response to the client’s and regulations requirements, while aiding: - the project authors in their conception tasks, by making up the project architectural forces, in accordance with the actors’ objectives; - and the client in his participation in the multiple partners negotiation. [less ▲]

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See detailA clinical study of the efficacy and safety of caninsulin in cats with uncomplicated diabetes mellitus: preliminary results
Clercx, Cécile ULg; Michiels, L.

in 10th ESVIM Meeting - Neuchatel - Suisse (2000, October)

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See detailAlimentation et modifications de la composition en acides gras des graisses corporelles des porcs et des volailles.
Thewis, André ULg; Rossi, Florence

Conference given outside the academic context (2000)

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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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See detailCombinatorial optimization approaches to the design of load shedding schemes against voltage instability
Moors, Cédric; Lefebvre, Daniel; Van Cutsem, Thierry ULg

(2000, October)

This paper proposes a methodology for the design of automatic load shedding against long-term voltage instability. In a first step, a set of training scenarios is set up, corresponding to various ... [more ▼]

This paper proposes a methodology for the design of automatic load shedding against long-term voltage instability. In a first step, a set of training scenarios is set up, corresponding to various operating conditions and disturbances. Each scenario is analyzed to determine the minimal load shedding which stabilizes the system, with due consideration for the shedding location and delay. In a second step, the parameters of a closed-loop undervoltage load shedding scheme are determined so as to: (i) approach as closely as possible the optimal sheddings computed in the first step, over the whole set of scenarios; (ii) stabilize the system in all the unstable scenarios and (iii) shed no load in the stable ones. The corresponding optimization problem is solved using three methods : genetic algorithms, branch and bound approach and the so-called “sequential design”. A detailed example is given on the Hydro-Qu´ebec system in which load shedding is presently planned. [less ▲]

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See detailObésité et hypertension artérielle: de la physiopathologie au traitement
Geronooz, Isabelle; Krzesinski, Jean-Marie ULg

in Revue Médicale de Liège (2000), 55(10), 921-928

Obesity constitutes a problem of major concern in our industrialized countries. Overweight is frequently associated with hypertension (50% of hypertensive subjects are obese and the prevalence of ... [more ▼]

Obesity constitutes a problem of major concern in our industrialized countries. Overweight is frequently associated with hypertension (50% of hypertensive subjects are obese and the prevalence of hypertension in obese patients is twice that of the normal population). Both pathologies are major cardiovascular risk factors. This review aims at a better understanding of the relationship between hypertension and overweight and at giving to the clinicians simple and consistent guidelines to treat these two medical entities. [less ▲]

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See detailApplication of a Mixed Normal Mixture Model for the Estimation of Mastitis-Related Parameters
Detilleux, Johann ULg; Leroy, P. L.

in Journal of Dairy Science (2000), 83(10), 2341-9

The current methodology for estimating genetic parameters for SCC (SCS) does not account for the difference in SCS between healthy cows and cows with an intramammary infection (IMI). We propose a two ... [more ▼]

The current methodology for estimating genetic parameters for SCC (SCS) does not account for the difference in SCS between healthy cows and cows with an intramammary infection (IMI). We propose a two-component finite mixed normal mixture model to estimate IMI prevalence, separate SCS subpopulation means, individual posterior probabilities of IMI, and SCS variance components. The theory is presented and the expectation-conditional maximization algorithm is utilized to compute maximum likelihood estimates. The methodology is illustrated on two simulated data sets based on the current knowledge of SCS parameters. Maximum likelihood estimates of IMI prevalence and SCS subpopulation means were close to simulated values, except for the estimate of IMI prevalence when both subpopulations were almost confounded. Individual posterior probabilities of IMI were always higher among infected than among healthy cows. Error and additive variance components obtained under the mixture model were closer to simulated values than restricted maximum likelihood estimates obtained assuming a homogeneous SCS distribution, especially when subpopulations were completely separated and when mixing proportion was highest. Convergence was linear and rapid when priors were chosen with caution. The advantages of the methodology are demonstrated, and its feasibility for large data sets is discussed. [less ▲]

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See detailSurface structure of thin film blends of polystyrene and poly(n-butyl methacrylate)
Affrossman, S.; Jérôme, Robert ULg; O'Neill, S. A. et al

in Colloid and Polymer Science (2000), 278(10), 993-999

Thin films of blends of polystyrene (PS) and poly(n-butyl methacrylate) (PBMA) were prepared by spin-casting onto silicon wafers in order to map the lateral distribution of the two polymers. The surfaces ... [more ▼]

Thin films of blends of polystyrene (PS) and poly(n-butyl methacrylate) (PBMA) were prepared by spin-casting onto silicon wafers in order to map the lateral distribution of the two polymers. The surfaces were examined by atomic force microscopy (AFM) secondary ion mass spectroscopy X-ray photoelectron spectroscopy (XPS) and photoemission electron microscopy (PEEM). Films with PBMA contents of 50% w/w or less were relatively smooth, but further increase in the PBMA content produced, initially, protruding PS ribbons and then, for PBMA ≥80% w/w, isolated PS islands. At all concentrations the topmost surface (0.5-1.0 nm) was covered by PBMA, whilst the PBMA concentration in the near-surface region, measured by XPS, increased with bulk content to eventual saturation. PEEM measurements of a PS-PBMA film at the composition at which ribbon features were observed by AFM also showed a PS-rich ribbon structure surrounded by a sea of mainly PBMA. [less ▲]

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See detailUn ordonnanceur assurant des services différenciés relatifs basés sur le délai
Jennes, Geoffroy; Leduc, Guy ULg; Tufail, Mudassir

in Courtiat, Jean-Pierre; Diaz, Michel; Sénac, Patrick (Eds.) Qualité de Service, multimédia et mobilité (2000, October)

Nous proposons l'ordonnanceur RD-VC garantissant des services différenciés (DiffServ) relativement quantifiés basés sur le délai. Un tel ordonnanceur assure que différentes classes de service obtiennent ... [more ▼]

Nous proposons l'ordonnanceur RD-VC garantissant des services différenciés (DiffServ) relativement quantifiés basés sur le délai. Un tel ordonnanceur assure que différentes classes de service obtiennent des délais inversement proportionnels à des indices de qualité fixés, quelle que soit la charge du réseau, et sans signalisation, ni contrôle d'admission. De plus, bien que cet algorithme ne s'applique qu'aux classes de services, les délais relatifs sont également respectés pour chaque flux composant ces agrégats. Ceci permet d'assurer des qualités de service au niveau des (micro)flux sans que leur grand nombre ne conduise à un effondrement du système. L'algorithme offre de bonnes performances tout en étant très peu coûteux : le traitement par paquet est très léger et il n'est même pas nécessaire de disposer d'une file d'attente par classe de service. [less ▲]

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