References of "2000"
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See detailAn Active Layered Multicast Adaptation Protocol
Yamamoto, Lidia; Leduc, Guy ULg

in Lecture Notes in Computer Science (2000, October 16), 1942

We describe an active application in the field of multicast congestion control for real-time traffic. Our Active Layered Multicast Adaptation Protocol is a layered multicast congestion control scheme ... [more ▼]

We describe an active application in the field of multicast congestion control for real-time traffic. Our Active Layered Multicast Adaptation Protocol is a layered multicast congestion control scheme built on top of an Active Network infrastructure. It benefits from router support in order to obtain information about resources available and to perform the adaptation tasks at the places where shortage of resources occur. It supports heterogeneous receivers through the combination of layered multicast transmission with selective filtering and pruning of layers within the active nodes. Market-based resource management ideas are applied to achieve a resource utilisation level that represents an equilibrium between the user goals and the node operator goals. Our simulation results show that the protocol is feasible and provides adequate reactions to short term and persistent congestion, while keeping the amount of state and processing in the active nodes limited. [less ▲]

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See detailNuclear Factor-Kappa B, Cancer, and Apoptosis
Bours, Vincent ULg; Bentires-Alj, M.; Hellin, A. C. et al

in Biochemical Pharmacology (2000), 60(8), 1085-9

The role of nuclear factor (NF)-kappa B in the regulation of apoptosis in normal and cancer cells has been extensively studied in recent years. Constitutive NF-kappa B activity in B lymphocytes as well as ... [more ▼]

The role of nuclear factor (NF)-kappa B in the regulation of apoptosis in normal and cancer cells has been extensively studied in recent years. Constitutive NF-kappa B activity in B lymphocytes as well as in Hodgkin's disease and breast cancer cells protects these cells against apoptosis. It has also been reported that NF-kappa B activation by tumor necrosis factor (TNF)-alpha, chemotherapeutic drugs, or ionizing radiations can protect several cell types against apoptosis, suggesting that NF-kappa B could participate in resistance to cancer treatment. These observations were explained by the regulation of antiapoptotic gene expression by NF-kappa B. However, in our experience, inhibition of NF-kappa B activity in several cancer cell lines has a very variable effect on cell mortality, depending on the cell type, the stimulus, and the level of NF-kappa B inhibition. Moreover, in some experimental systems, NF-kappa B activation is required for the onset of apoptosis. Therefore, it is likely that the NF-kappa B antiapoptotic role in response to chemotherapy is cell type- and signal-dependent and that the level of NF-kappa B inhibition is important. These issues will have to be carefully investigated before considering NF-kappa B as a target for genetic or pharmacological anticancer therapies. [less ▲]

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See detailA propos de la contemporanéité de l'hôpital: histoire d'un devenir sans histoire
Havelange, Carl ULg

Conference given outside the academic context (2000)

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See detailLocal buckling in case of fire
Franssen, Jean-Marc ULg; Talamona, Didier

Conference (2000, October 13)

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See detailL'institution du regard. De l'invention de la perspective à celle de la photographie
Havelange, Carl ULg

Scientific conference (2000, October 10)

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See detailPrévention des infections périnatales à streptocoques du groupe B.
Melin, Pierrette ULg

Scientific conference (2000, October 05)

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See detailL'influence des réglementations d'ordre public sur la validité des contrats
Delnoy, Michel ULg

in Immobilier (2000), 17

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See detailHST/STIS Observations of a Dawn Auroral Storm on Jupiter
Clarke, J. T.; Gladstone, R.; Pryor, W. et al

in Bulletin of the American Astronomical Society (2000, October 01)

The HST/STIS recorded a detailed time series of images and spectra of the UV emissions from a dawn auroral storm on Jupiter on 21 Sept. 1999. The images show complex and evolving fine structure in the ... [more ▼]

The HST/STIS recorded a detailed time series of images and spectra of the UV emissions from a dawn auroral storm on Jupiter on 21 Sept. 1999. The images show complex and evolving fine structure in the storm, while the emission center remained along the main oval and near dawn in magnetic local time. We serendipitously recorded low resolution UV spectra of the north-south spatial distribution of the auroral emissions. These spectra show far stronger hydrocarbon absorptions than observed in any previous auroral spectra. This indicates an unusually deep penetration of the incident primary particles with respect to the neutral atmosphere, and correspondingly high energy of the primary particles. We can thus use these spectra to identify many complex hydrocarbons in Jupiter's auroral atmosphere which are not normally measured in auroral spectra. These results will be presented along with model fits to the spectra derived both from fitting the observed hydrocarbon absorption features and from comparison with a photochemical model for the expected composition of the auroral atmosphere. This research has been supported by grant GO-8171.01-97A from the Space Telescope Science Institute to the University of Michigan. [less ▲]

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See detailA fluorescence model of the C[SUB]3[/SUB] radical in comets
Rousselot, P.; Arpigny, Claude ULg; Rauer, H. et al

in Bulletin of the American Astronomical Society (2000, October 01)

The fluorescence spectrum of the C[SUB]3[/SUB] radical in comets is investigated. A theoretical model which takes into account the rotational structure and the different vibrational levels of the bending ... [more ▼]

The fluorescence spectrum of the C[SUB]3[/SUB] radical in comets is investigated. A theoretical model which takes into account the rotational structure and the different vibrational levels of the bending mode ν [SUB]2[/SUB] involved in the emision of the 4050 à \ group, is elaborated. This model is used to interpret high-resolution spectra of some recent comets. The agreement between observed and theoretical spectra is satisfactory with some realistic assumptions on the electronic oscillator strength and the dipole moment derivative, which determine the relative importance of the rotation-vibration transitions. Different synthetic spectra which show the influence of the Swings effect and the consequences of the change in the heliocentric distance are also calculated and are presented. [less ▲]

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See detailThe isotope ratios [SUP]12[/SUP]C/[SUP]13[/SUP]C and [SUP]14[/SUP]N/[SUP]15[/SUP]N in comet C/1995 O1 (Hale-Bopp)
Arpigny, Claude ULg; Schulz, R.; Manfroid, Jean ULg et al

in Bulletin of the American Astronomical Society (2000, October 01)

The abundance ratios of stable isotopes of the light elements in comets may provide clues of cosmogonical significance. Measuring isotopic ratios in an optical cometary spectrum is, however, a rather ... [more ▼]

The abundance ratios of stable isotopes of the light elements in comets may provide clues of cosmogonical significance. Measuring isotopic ratios in an optical cometary spectrum is, however, a rather difficult task for different reasons. Such measurements require, in particular, very high spectral resolution and are feasible so far only on bright objects. In 1997 we observed comet Hale-Bopp with the 2.6 m Nordic Optical Telescope on La Palma, Canary Islands, with a view to estimating the [SUP]12[/SUP]C/[SUP]13[/SUP]C abundance ratio. About twenty high-resolution (λ /Πλ ~ 70000) spectra of the strong CN Violet (0,0) band were secured with the SOFIN spectrograph from 7 to 13 April. The heliocentric and geocentric distances of the comet were then close to 0.9 AU and 1.4 AU, respectively. While the data do show the expected lines of the [SUP]13[/SUP]C[SUP]14[/SUP]N isotopic molecule, we have been surprised to find in addition a number of very weak features, which are real and turn out to be positioned very near to the theoretical wavelengths of lines pertaining to the R branch of [SUP]12[/SUP]C[SUP]15[/SUP]N. After a short description of the reduction and analysis of the data our paper discusses the results derived for [SUP]12[/SUP]C/[SUP]13[/SUP]C and [SUP]14[/SUP]N/[SUP]15[/SUP]N as well as their possible implications. We also present a brief review of the carbon and nitrogen isotopic ratios in various solar system objects and consider the question whether any nucleosynthesis site(s) is (are) known where pairs of values similar to those we measure in comet Hale-Bopp could be produced. [less ▲]

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See detailReactivity of functional SAN toward coreactive EPR-g-MA at planar interface
Pagnoulle, Christophe; Moussaif, Noureddine; Riga, Joseph et al

in Journal of Polymer Science. Part A, Polymer Chemistry (2000), 38(19), 3682-3689

The grafting kinetics of reactive poly(styrene-co-acrylonitrile) (SAN) onto EPR-g-MA was studied under isothermal conditions, at the planar interface of an SAN/ethylene-propylene rubber (EPR) bilayer film ... [more ▼]

The grafting kinetics of reactive poly(styrene-co-acrylonitrile) (SAN) onto EPR-g-MA was studied under isothermal conditions, at the planar interface of an SAN/ethylene-propylene rubber (EPR) bilayer film in relation to the type of reactive groups, NH2 versus carbamate (which is an amine precursor), attached to SAN. The amount of SAN chemically bound to EPR chains at the interface was estimated by selectively washing off the unreacted SAN chains before X-ray photon spectroscopic analysis of the released surface. It is clear that the mutual reactivity of the reactive groups, i.e., the NH2-MA pair versus the carbamate-MA pair, has a decisive effect on the amount of SAN that reacts with EPR-g-MA at the interface. In case of SAN-carb, the grafting reaction is controlled by the thermolysis of the carbamate groups into primary amines. [less ▲]

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See detailContribution à l’étude de la fonction musculaire du sujet fibromyalgique
Maquet, Didier ULg; Croisier, Jean-Louis ULg; Renard, Cindy ULg et al

in Actes du symposium « Evidence Based Physiotherapy » de la Fédération Nationale des Docteurs et Licenciés en Kinésithérapie (2000, October)

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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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