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See detailInfluence of Silicon and Aluminium Contents on the Phase Transformations During the Heat-Treatment of TRIP-assisted Multiphase Steels
Jacques, Pascal; Girault, Etienne; Mertens, Anne ULg et al

in Mideat, S. J.; Pfaffmann, G. D. (Eds.) Proceedings of the International Symposium in honor of Prof. G. Krauss, 19th Heat Treating Society Conference (1999, November)

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See detailCinétique d’acidification de la farine de mil par 2 souches de Lactobacillus plantarum, une souche de Lactobacillus fermentum et Pediococcus sp.
Tine, E.; Takedam, P.; Mane, P. L. et al

in Actes de l'Atelier International : "Les petites industries agro-alimentaire pour une nutrition saine en afrique de l'Ouest" (1999, November)

Detailed reference viewed: 25 (1 ULg)
See detailPourquoi et comment effectuer un renforcement musculaire excentrique ?
Croisier, Jean-Louis ULg; Crielaard, Jean-Michel ULg

in Actes du Congrès Eurokiné 1999 (1999, November)

Detailed reference viewed: 54 (5 ULg)
See detailExercices excentriques appliqués au traitement des tendinites
Forthomme, Bénédicte ULg; Croisier, Jean-Louis ULg; Foidart-Dessalle, Marguerite ULg et al

in Actes du Congrès Eurokiné 1999 (1999, November)

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See detailLa transformation semi-industrielle des produits fermentés à base de mil au Sénégal : procédés qualité et contraintes au développement industriel.
Leite, N.; Totte, A.; Diop, M. et al

in Actes de l'Atelier International : "Les petites industries agro-alimentaire pour une nutrition saine en afrique de l'Ouest". (1999, November)

Detailed reference viewed: 15 (0 ULg)
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See detailPerspective and limit of candidate gene marker’s technology in animal breeding.
Renaville, Robert ULg; Parmentier, Isabelle; Gengler, Nicolas ULg et al

in Congresso de Melhoramento Genetico (1999, November)

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See detailA scheduler for delay-based service differentiation among AF classes
Tufail, Mudassir; Jennes, Geoffroy; Leduc, Guy ULg

in Tsang, D.; Kühn, P. (Eds.) Broadband Communications - Convergence of Network Technologies (1999, November)

In the Differentiated Services (DS) framework, service differentiation is performed among the aggregates (collection of one or more microflows) rather than among the microflows (data stream pertaining to ... [more ▼]

In the Differentiated Services (DS) framework, service differentiation is performed among the aggregates (collection of one or more microflows) rather than among the microflows (data stream pertaining to a single connection). We analyse three quality metrics namely bandwidth, loss and delay (that might be used for defining a service differentiation at a DS node) on two criteria 1) service differentiation should be respected at all loads and 2) service provision at aggregate level should scale down to microflow level without being microflow aware. We find that bandwidth requires microflow aware management, loss lacks in simplicity (though it satisfies the criterion # 2), and delay is the right candidate. Ensuring better delays at an aggregate level also means ensuring better delays for all the included micro flows, and additionally it is easier to define a scheduler that can adapt itself to the relative loads of the aggregates so that relative delays between aggregate are preserved at all loads. Our objective is to provide relative quantification service in DiffServ by a delay-based scheduler while satisfying both criteria. Delay is also a meaningful QoS parameter for both interactive real-time applications and TCP applications, since the mean TCP throughput is roughly inversely proportional to the RTT. We, therefore, develop a scheduler for Assured Forwarding (AF) PHB where service differentiation among aggregates is based on delays. We provide simulation results that prove that relative delays among aggregates are perfectly respected at all loads. [less ▲]

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See detailCompact and Portable Photorefractive Holographic Camera in View of High Accuracy and Dynamic Objects Displacements and Deformations Measurement
Georges, Marc ULg; Lemaire, Philippe

in Proceedings of the PHOTOMEC'99-ETE'99 European Workshop (1999, November)

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See detailControl of pneumonia in calves
Lekeux, Pierre ULg

(1999, October 22)

Respiratory disease is the principal cause of loss of young cattle worldwide. The syndrome arises from a number of factors, including Chose involving the animal, e.g., age, general condition and immune ... [more ▼]

Respiratory disease is the principal cause of loss of young cattle worldwide. The syndrome arises from a number of factors, including Chose involving the animal, e.g., age, general condition and immune statue; ifs environment, e.g., changes in food, temperature and humidity that lead to stress; and the presence of infections agents, e.g., bacteria, viruses and mycoplasmas. The syndrome, in a method preferred by the author, can be classified into four grades: Grade 1, subclinical disease;Grade 2, compensated clinical disease (at this stage, the inflammatriry reaction generated tends to lirait the impact of the disease on thi animal); Grade 3, noncompensated clinical disease (at this stage, the inflamniattxy reaction is excessive and must be controlled); and Grade 4, irrevertibk clinical disease (which threatens the animal's survival). The increase in frequency and economic impact of bovine respiratory disease complex can be correlated with the escalating industrialisation of cattle production. In intensive operations, commingling of animale from multiple sources, exposure to many organisme, stress and management practicgs are all factors that can lead to disease. - The predisposition of cattle, especially beef calves, to respiratory problems is related to their lack of functional pulmonary hardiness. Selection of breeds that demonstrate adequate pulmonary function and sufficient ventilatory reserve may help in the control of the bovine respiratory disease complex, but this approach is difficult to implement and slow to produce results. Prophylactic measures, including vaccination programmes and modifying management practices to reduce stress, also have a place in preventing the bovine respiratory disease complex. Unfortunately, these measures are not always easy to put into operation and cannot completely eradicate the problem. Therapeutic strategies to minimise the economic impact of the syndrome include use of appropriate antibacterial therapy, modulation of the pulmonary inflammatory reaction and correction of mechanical disorders. [less ▲]

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See detailModulation of growth hormone action by active immunization in dairy cows.
Vleurick, Lieve; Deaver, D.; Bertozzi, Carlo et al

in 1st Belgian Workshop on Animal Endocrinology (1999, October 13)

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See detailModulation of the biological action of bovinegrowth hormone by passive immunization in hypophysectomised rat.
Jacqmin, Sophie; Vleurick, Lieve; Renaville, Robert ULg et al

in 1st Belgian Workshop on Animal Endocrinology (1999, October 13)

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See detailIdentification of animals treated with bovine somatotropin : a new non-isotopic detection system for BST
Baronheid, Christophe; Bertozzi, Carlo; Renaville, Robert ULg et al

in 1st Belgian Workshop on Animal Endocrinology (1999, October 13)

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See detailOptical calibration of the FUV spectrographic imager for the IMAGE mission
Habraken, Serge ULg; Houbrechts, Yvette ULg; Renotte, Etienne ULg et al

in Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series (1999, October 01)

The FUV Spectrographic Imager for IMAGE is simultaneously imaging auroras at 1218 and 1358 angstrom. It is designed to efficiently reject the Lyman-(alpha) emission line at 1215.7 angstrom. This paper ... [more ▼]

The FUV Spectrographic Imager for IMAGE is simultaneously imaging auroras at 1218 and 1358 angstrom. It is designed to efficiently reject the Lyman-(alpha) emission line at 1215.7 angstrom. This paper describes the optical calibration. The content is: 1) field of view calibration: detector pixels location with respect to the reference optical cube; distortion matrix used to computer the TDI. b) Radiometric calibration: detector response and linearity; instrument throughput according to its clear aperture and mirror reflection lost; response vs. wavelength and band-rejection certification. [less ▲]

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See detailAcceptance tests of the INTEGRAL Optical Monitoring Camera subsystems
Mazy, Emmanuel ULg; Plesseria, Jean-Yves ULg; Renotte, Etienne ULg et al

in Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series (1999, October 01)

The Optical Monitoring Camera (OMC) is a part of the scientific payload being developed for the ESA INTEGRAL mission, scheduled to be launched in 2001. The OMC is a imager that will monitor star ... [more ▼]

The Optical Monitoring Camera (OMC) is a part of the scientific payload being developed for the ESA INTEGRAL mission, scheduled to be launched in 2001. The OMC is a imager that will monitor star variations in the V-band in a 5 X 5 degree(s) field of view. This paper describes the acceptance tests for 3 sub-systems of OMC: the optical system, the baffle and the cover system. [less ▲]

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See detailPSF modeling of the XMM flight mirror modules
Stockman, Yvan ULg; Houbrechts, Yvette ULg; Nazé, Yaël ULg et al

in Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series (1999, October 01)

In the frame of XMM testing, all the mirror modules have been illuminated by a vertical EUV collimated beam a the Centre Spatial de Liege. A mirror module consists in 58 co- focal and co-axial Wolter I ... [more ▼]

In the frame of XMM testing, all the mirror modules have been illuminated by a vertical EUV collimated beam a the Centre Spatial de Liege. A mirror module consists in 58 co- focal and co-axial Wolter I mirrors. Up to now the images obtained at CSL have been used to assess the Mirror Module optical performances in a flight representative configuration, and also to verify the impact of the thermal environmental and vibration test on the optical performance. Due to the highly complex design of the Mirror Modules, simulating XMM images in details is very difficult. The Point Spread Function of some of the mirror modules presents slight asymmetry. In the facility design study, it has been demonstrated that the diffraction impact at 58.4 nm is negligible with respect to the half energy width mirror module specification. Presently all the mirror modules are better than 165 arcsec. This paper presents first the diffraction contribution on the image. In a second step a point spread function is built by using the metrological mirror shell data. EUV images are then analyzed to evaluate the impact of the mirror interface structure integration process on the PSF. An analytical model of the measured EUV pSF is developed. The modelization technique is applied to simulate in-orbit image. Finally the different modelizations are evaluated and compared. [less ▲]

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See detailSclerosing encapsulating peritonitis in two young Dobberman
Michiels, L.; Peeters, Dominique ULg; Hansen, P. et al

in 9th ESVIM Meeting - Perugia - Italie (1999, October)

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See detailKinetics modelling of convective heat drying of wastewater treatment sludge
Léonard, Angélique ULg; Salmon, Thierry ULg; Janssens et al

in Flamand, G. (Ed.) Récents progrés en génie des procédés vol.13 n.68 : separations. ECCE 2 conference Montpellier 5/7.10.99 (1999, October)

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See detailApplication of nuclear scintigraphy to evaluation of pulmonary function
Votion, Dominique ULg

in In Proceedings: 17th Comparative Respiratory Society Meeting (1999, October)

Nuclear imaging techniques have a long history in pulmonary medicine and the clinical and experimental uses of lung scintigraphy have largely expanded these last years. Currently, the pulmonary ... [more ▼]

Nuclear imaging techniques have a long history in pulmonary medicine and the clinical and experimental uses of lung scintigraphy have largely expanded these last years. Currently, the pulmonary applications of nuclear scintigraphy are essentially: (I), the study of regional lung function; (II), the imaging of pulmonary infection and/or inflammation; (III), the determination of inflammatory cells involvement in lung diseases; (IV), the assessment of the alveolar-capillary barrier integrity; (V), the imaging of lung cancers and (VI), the study of aerosol deposition within the lung. Many faculty of veterinary medicine have acquired nuclear imaging facilities. The primary application of scintigraphy is in the investigation of equine orthopaedic conditions and, with the exception of rodents, only a few publications report the use of lung scintigraphy in any animal species. Nevertheless, lung scintigraphy using animals would be of great interest to better understand the lung physiology in general as well as animals’ peculiarities in particular. Following a brief introduction to the technique, this paper will review the main applications of pulmonary scintigraphy and will survey some new nuclear imaging techniques that should be available in the next future. [less ▲]

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See detailPotential effects of NSAID on myocellular enzyme leakage and delayed onset muscle soreness induced by isokinetic eccentric exercise
Croisier, Jean-Louis ULg; Camus, Gérard; Crielaard, Jean-Michel ULg

in Actes du XIXe Congrès National de la Société Française de Médecine du Sport (1999, October)

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See detailCharacterization of nonlinear aeroservoelastic behaviour
Dimitriadis, Grigorios ULg; Cooper, Jonathan Edware

in RTO-MP-036 Structural Aspects of Flexible Aircraft Control (1999, October)

The characterisation of the behaviour of nonlinear aeroelastic systems has become a very important re- search topic. Nevertheless, most of the work carried out to date concerns the development of unsteady ... [more ▼]

The characterisation of the behaviour of nonlinear aeroelastic systems has become a very important re- search topic. Nevertheless, most of the work carried out to date concerns the development of unsteady CFD solutions in the transonic region. Important though this work is, there is also a need for research which aims at understanding the behaviour of non- linear systems, particularly the occurance of Limit Cycle Oscillations (LCOs). The purpose of this pa- per is to study the stability of a simple aeroservoelas- tic system with nonlinearities in the control system. The work considers both structural and control law nonlinearities and assesses the stability of the system response by use of bifurcation diagrams. It is shown that simple feedback systems designed to increase the stability of the linearised system also stabilise the nonlinear system, although their effects can be less pronounced. Additionally, a nonlinear control law designed to limit the control surface pitch response was found to increase the flutter speed considerably by forcing the system to undergo limit cycle oscilla- tions instead of fluttering. Finally, friction was found to affect the damping of the system but not its sta- bility, as long as the amplitude of the frictional force is low enough not to cause stoppages in the motion. [less ▲]

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See detailFire Models for Safety Concept of Steel Structures - I modelli di incendio per la valutazione della sicurezza di strutture in acciaio
Pustorino, Sandro; Schleich, Jean-Baptiste; Cadorin, Jean-François et al

in Proc. XVII Congresso C.T.A., Costruire in acciaio: Strutture e architettura (1999, October)

Detailed reference viewed: 26 (1 ULg)
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See detailNewcastle disease virus infection, a permanent threat for poultry and pet birds
Vindevogel, Henri ULg; Duchatel; Marlier, Didier ULg et al

in Proceedings of the 26th world veterinary congress (1999, September 23)

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See detailTropospheric boundary layer investigations by differential ground-based solar FTIR spectrometry
Barret, Brice; Mahieu, Emmanuel ULg; Carleer, Michel et al

in Carleer, Michel; Hilton, Moira; Lamp, Thorsten (Eds.) et al Environmental Sensing and Applications (Proceedings Volume) (1999, September 16)

In order to better understand the chemistry and the transport mechanisms in the lower troposphere, a new original technique has been developed and tested. The experiment consists in recording high ... [more ▼]

In order to better understand the chemistry and the transport mechanisms in the lower troposphere, a new original technique has been developed and tested. The experiment consists in recording high resolution infrared solar absorption spectra containing signatures of important atmospheric constituents, simultaneously from the International Scientific Station of the Jungfraujoch in Switzerland [ISSJ, 3580 m a.s.l., 46.5 degrees N, 8 degrees E, Bruker 120 HR Fourier transform spectrometer (FTS)] and from a nearby valley (Grindelwald, 1070 m a.s.l., Bruker 120 M FTS). Analysis of individual spectra allows to determine vertical column abundances: differences between measurements at ISSJ and at Grindelwald enable us to retrieve the constituents' concentrations between 1070 m and 3580 m, assuming a constant volume mixing ratio in this layer. A first measurement campaign has been organized during the months of May and June 1998. After an initial period of instrument intercomparison at ISSJ, the mobile instrument was moved down in the valley and installed for one month in Grindelwald. When operated side by side at the Jungfraujoch, measurements made by both instruments showed a very good agreement (maximum bias of 1.5%). Analysis of spectra recorded synchronously at the Jungfraujoch and at Grindelwald gave average boundary layer concentrations for a selected set of tropospheric molecules, i.e. methane, nitrous oxide, carbon monoxide and ethane. Comparison with other results and with carbon monoxide in-situ measurements made at ISSJ showed a good agreement. [less ▲]

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See detailLe froment d'hiver
Bodson, Bernard ULg; Couvreur, Luc; Vancutsem, Françoise ULg et al

in Livre Blanc: Céréales - Gembloux - Informations avant les semis (1999, September 09)

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See detailEscourgeon et Orge d'hiver fourragers
Herman, Jean-Luc; Bodson, Bernard ULg; Monfort, Bruno et al

in Livre Blanc: Céréales - Gembloux - Informations avant les semis (1999, September 09)

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See detailFiguring sequences on a super-smooth sample
Tock, Jean-Philippe; Collette, Jean-Paul; Gailly, Patrick ULg et al

in Geyl, Roland; Maxwell, Jonathan (Eds.) Optical Fabrication and Testing, Proc. SPIE Volume: 3739 (1999, September 06)

An ion beam figuring facility is operational at the Centre Spatial de Liège since 1997. Its present capabilities are described. An extensive characterisation programme is running in order to determine the ... [more ▼]

An ion beam figuring facility is operational at the Centre Spatial de Liège since 1997. Its present capabilities are described. An extensive characterisation programme is running in order to determine the optimised parameters for various materials and operating conditions. In this frame, tests have been performed on a spherical gold-coated aluminium mirror plated in between with nickel. The nickel plating was used to be super-polished to a BRDF of 1 10-4 at 1 deg at 10 µm wavelength. Micro-roughness and etching rate measurements were realised and influence of ion bombardment on the coating has been established after removal of the gold coating. The gold coating removing was performed by using the ion beam flux. Finally, the mirror has been figured from the original sphere to a parabola. Surface characteristics evolution is also described in terms of micro-roughness and surface error. An overview of the research and development programmes related to this facility is given. Results of this technique and potential impact on optics fabrication are then briefly exposed. [less ▲]

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See detailIon beam figuring of small BK7 and Zerodur optics : thermal effects
Gailly, Patrick ULg; Collette, Jean-Paul; Renson, Luc et al

in Geyl, Roland; Maxwell, Jonathan (Eds.) Optical Fabrication and Testing, Proc. SPIE Volume: 3739 (1999, September 06)

optics these last years. One of the disadvantages of ion figuring is the high surface temperature of the workpiece. Temperature aspects have already been mentioned by some authors but are weakly detailed ... [more ▼]

optics these last years. One of the disadvantages of ion figuring is the high surface temperature of the workpiece. Temperature aspects have already been mentioned by some authors but are weakly detailed. Therefore thermal effects on BK7 and Zerodur, mainly surface figure distortions and surface temperature measurements, have been investigated here in more detail. Distortion of the optical figure due to high temperature and temperature gradients induced by ion figuring is described. High figure distortion has been observed on 10 cm diameter BK7 samples. Distortions can also be observed on Zerodur samples (although much weaker). Differences between BK7 and Zerodur distortions are discussed. In order to analyse the nonuniform heating of the workpiece during ion bombardment, the surface temperature has been monitored with an infrared camera. Furthermore, surface temperature measurements with respect to ion beam parameters have also been performed. All these measurements show the necessity to care about thermal aspects during ion beam figuring for some sensible materials like BK7, but even for low expansion material like Zerodur. [less ▲]

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See detailAttaining per flow QoS with Class-based Differentiated Services
Tufail, Musassir; Jennes, Geoffroy; Leduc, Guy ULg

in Onvural, R.; Civanlar, S.; Luciani, J. (Eds.) Internet II: Quality of Service and Future Directions (1999, September)

The Differentiated Services (DiffServ or DS) framework takes an edge over IntServ because it is scalable and lesser complex. On the other hand, the application level end-to-end quality o f service, in ... [more ▼]

The Differentiated Services (DiffServ or DS) framework takes an edge over IntServ because it is scalable and lesser complex. On the other hand, the application level end-to-end quality o f service, in DiffServ, may get compromised because: 1) network resources are not allocated at microflow level (a data stream pertaining to a single connection) but at aggregate level (collection of one or more microflows), 2) the DiffServ working group does not specify algorithms for PHBs but their output behavio urs and 3) end-to-end quality is function of Service Level Agreements (SLAs) between the adjacent domains transited by the connection and a large diversity in SLAs is quite evident as each DS domain would have different service provision policies. We focus, in this paper, on the first two issues. Our goal is to ha ve DiffServ deployed with all its simplicity and still be able to provide application level end-to-end qu ality of service. For that, we study a PHB for AF classes. A PHB comprises a packet scheduler and a packe t accept/discard algorithm. For packet scheduler, we use the Extended-VirtualClock (Ex-VC) algorithm. Ex-VC perfo rms delay-based service differentiation among the aggregates while selecting a packet for service. The reasons for having delay-based definition for service differentiation are: it is adaptable to load per aggr egate and it does not need to be microflow aware. Other definitions like bandwidth and loss may also be u sed but the former requires microflow aware management and the latter lacks in simplicity. For packet accept/discard algorithm, we use RED when all packets have the same drop precedence level and DI-RO (Deterministic for In-RED for Out) when packets are policed at the ingress DS node and packets viol ating the Service Level Agreement (SLA) are marked OUT. In DI-RO, IN packets are always accepted (except buffer overflow) whereas OUT packets are accepted probabilistically. [less ▲]

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See detailAceleración del método Generalized Multipole Technique para el estudio de la dispersión electromagnética de objetos de grandes dimensiones
Obelleiro, Fernando; Landesa, Luis; Pino, Marcos R et al

(1999, September)

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See detailSíntesis de agrupaciones de antenas para el calentamiento selectivo de tejidos humanos
V Sabariego, Ruth ULg; Landesa, Luis; Obelleiro, Fernando

(1999, September)

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See detailGeneralized multipole technique with directive beam expansions
Landesa, Luis; V Sabariego, Ruth ULg; Jose Manuel, Taboada

(1999, September)

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See detailA decade of IT Adoption in Agriculture - an Agricultural Software-Review Perspective
Gelb, Ehud M.; Bonati, G.; Grontoft, Magnus et al

in A decade of IT Adoption in Agriculture - an Agricultural Software-Review Perspective (1999, September)

The past decade is characterized by major changes in the Information Technology (IT) environment in agriculture - e.g. from batch processing of management data at service centers to adoption of multiple ... [more ▼]

The past decade is characterized by major changes in the Information Technology (IT) environment in agriculture - e.g. from batch processing of management data at service centers to adoption of multiple, on-farm, IT installations. An 11 country survey identified nonstructured and variable adoption patterns with a wide range of IT specifics. Software development facilitated these changes. A time-series software-installation count provided a usefull indicator of which, how many, how fast and when software were adopted. Study of Internet implementation for agricultural extension provided additional insight and explanation of IT adoption processes. [less ▲]

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See detailLe travail policier, entre poids des règles et autonomie professionnelle, quelles politiques de GRH ?
Schoenaers, Frédéric ULg

in collectif (Ed.) Actes du congrès de l’AGRH (1999, September)

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See detailBringing simulation to application. Some guidelines and practical recommandations issued from IEA-BCS Annex 30
Andre, Philippe ULg; Lebrun, Jean ULg; Ternoveanu, A.

in Proceedings "Building simulation 99" (1999, September)

Simulation tools are not yet used as much and as well as they should all along building life cycle ( BLC ). Most important decisions are still taken almost without using these tools. The work done in the ... [more ▼]

Simulation tools are not yet used as much and as well as they should all along building life cycle ( BLC ). Most important decisions are still taken almost without using these tools. The work done in the frame of IEABCS Annex 30 consisted in identifying and eliminating as much as possible the main bottle necks encountered in the use of simulation tools. [less ▲]

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See detailInternally Stayed Trusses : The Search for Minimum Weight
Samyn, Philippe; Latteur, Pierre ULg

(1999, September)

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See detailOptimization of Parabolic Arches Subjected to Distributed Loads
Latteur, Pierre ULg; Samyn, Philippe

(1999, September)

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See detailControlling form errors from 3D measures
Debongnie, Jean-François ULg; Masset, Luc ULg

in ASME (Ed.) Proceedings of the 1999 ASME Design Engineering Technical Conference (1999, September)

Owing to the fact that a correct evaluation of form errors is particularly difficult by the classical ways, it seems more efficient to develop numerical algorithms from 3D measures. Several methods are ... [more ▼]

Owing to the fact that a correct evaluation of form errors is particularly difficult by the classical ways, it seems more efficient to develop numerical algorithms from 3D measures. Several methods are described, including direct and iterative ones. A new method is proposed, which is based on Lp-norms and a specialized algorithm. It proved to be the most effective and robust one on every studied application. [less ▲]

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See detailA Comparison of Blade Tip-Timing Data Analysis Methods
Carrington, I. B.; Wright, J. R.; Cooper, J. E. et al

in Leung, A. Y. T.; Wright, J. R.; Sandoz, D. J. (Eds.) et al Proceedings of the First International Conference on the Integration of Dynamics, Monitoring and Control (1999, September)

The determination of the vibration characteristics of rotating engine blades is very important for fatigue failure considerations. One of the most promising techniques for measuring blade vibrations is ... [more ▼]

The determination of the vibration characteristics of rotating engine blades is very important for fatigue failure considerations. One of the most promising techniques for measuring blade vibrations is blade tip-timing. Three vibration analysis methods were used on data obtained from a simple mathematical blade tip-timing simulator. The results from the methods were compared statistically. One of the methods, the Global Autoregressive Instrumental Variables approach produced satisfactory results at realistic noise levels. However, all of the techniques produced biased results under certain circumstances. [less ▲]

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See detailAusdauer versus kraft-ausdauertraining bei freizeitsadsportlern
Weiler, B.; Urhausen, A.; Dahm, C. et al

in Abstractband "Deutsche Zeitschrift für sportmedizin" (1999, September)

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See detailA web-based mapping application to link. A crop modelling system (B-CGMS) and a GIS database.
Buffet, D.; Oger, Robert ULg; Dehem, D. et al

in Donatelli, Marcello; Stockle, Claudio; Villalobos, Francisco (Eds.) et al International symposium on modelling cropping systems Lleida, 21-23 june, 1999, Book of proceedings (1999, September)

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See detailAceleración de soluciones iterativas de problemas electromagnéticos mediante FMM (Fast Multipole Method)
Landesa, Luis; V Sabariego, Ruth ULg; Obelleiro, Fernando

(1999, September)

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See detailA Quasi-Coulomb Model for Frictional Contact Interfaces
Garcìa Garino, C.; Ponthot, Jean-Philippe ULg; Boman, Romain ULg et al

in MECOM'99 - Proceedings of the 6th Argentine Congress on Computational Mechanics (1999, September)

Frictional contact interfaces have to be modeled in practice when industrial problems such as metal forming operations, crashworthiness, and so on, have to be simulated. Usually a Coulomb model is used in ... [more ▼]

Frictional contact interfaces have to be modeled in practice when industrial problems such as metal forming operations, crashworthiness, and so on, have to be simulated. Usually a Coulomb model is used in order to describe the constitutive law for the frictional case. Following a standard plasticity approach to Coulomb law a non-symmetric tangent operator is found, and so a non-symmetric solver has to be used in order to take full advantage of consistent operators. With respect to symmetric ones, these non-symmetric operators lead to prohibitive computational times. However, in practice different schemes have been proposed in order to recover the symmetric operator, and consequently, use a symmetric solver. In this work an alternative approach based on an idea due to Garcia Garino and Oliver [33] is defined in order to avoid to deal with non-symmetric solvers and thus save a large amount of computational time, which renders the computational simulation more attractive to industry. Applications to metal forming simulations and crashworthiness analysis are envisaged. [less ▲]

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See detailA model for the prediction of form errors in face milling and turning
Masset, Luc ULg; Debongnie, Jean-François ULg; Foreau, Sylvie et al

in ASME (Ed.) Proceedings of he 1999 ASME Design Engineering Technical Conferences (1999, September)

A method is proposed for predicting form errors due to both clamping and cutting forces in face milling and turning. It allows complex tool trajectories and workpiece geometries. Error computation is ... [more ▼]

A method is proposed for predicting form errors due to both clamping and cutting forces in face milling and turning. It allows complex tool trajectories and workpiece geometries. Error computation is performed by the finite element method. An experimental validation of the model for face milling is presented. Two industrial applications are produced in order to demonstrate the capabilities of the method. [less ▲]

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See detailNon linear finite element modelling of the aeroelastic behaviour of a cable stayed structure
raimarckers, Nicolas; Lilien, Jean-Louis ULg

in Proceedings of the 3d ISCD 1999 (1999, August)

The importance of cable dynamics in the whole structure behaviour is highlighted by a finite element approach.Including wind turbulence modelisation.

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See detailNumerical Methods for the Lubricated Contact Between Solids in Metal Forming Processes
Boman, Romain ULg; Ponthot, Jean-Philippe ULg

in ECCM’99, European Conference on Computational Mechanics (1999, August)

In this paper, the lubrication problem in numerical simulation of forming processes is presented. In the case of the rolling process, the recent and complex model of Marsault for the solution of the mixed ... [more ▼]

In this paper, the lubrication problem in numerical simulation of forming processes is presented. In the case of the rolling process, the recent and complex model of Marsault for the solution of the mixed lubrication regime has been implemented and tested. This model needs the use of the finite difference method to work properly. We will discuss the advantages and the difficulties encountered when trying to solve the same problem with the finite element method in a general frame. Finally, a finite element formulation for the solution of the time dependant Reynolds’ equation coupled with the deformation of the workpiece is proposed. [less ▲]

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See detailA Symmetric Tangent Operator Recovery via Quasi-Coulomb Model for Frictional Contact Between Solids in Large Deformation Analysis
Garcìa Garino, Carlos; Ponthot, Jean-Philippe ULg; Boman, Romain ULg et al

in ECCM’99, European Conference on Computational Mechanics (1999, August)

Frictional contact interfaces have to be modeled in practice when industrial problems such as metal forming operations, crashworthiness, and so on, have to be simulated. Usually a Coulomb model is used in ... [more ▼]

Frictional contact interfaces have to be modeled in practice when industrial problems such as metal forming operations, crashworthiness, and so on, have to be simulated. Usually a Coulomb model is used in order to describe the constitutive law for the frictional case. Following a standard plasticity approach to Coulomb law a non-symmetric tangent operator is found, and so a non-symmetric solver has to be used in order to take full advantage of consistent operators. With respect to symmetric ones, these non-symmetric operators lead to prohibitive computational times. However, in practice different schemes have been proposed in order to recover the symmetric operator, and consequently, use a symmetric solver. In this work an alternative approach based on an idea due to Garcia Garino and Oliver [33] is defined in order to avoid to deal with non-symmetric solvers and thus save a large amount of computational time, which renders the computational simulation more attractive to industry. Applications to metal forming simulations and crashworthiness analysis are envisaged. [less ▲]

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See detailInulin incorporation in the pig diet as alternative to growth promoters : effect on specific systemic immunity ?
Rossi, Florence; Cox, E.; Goddeeris, B. et al

in EMBO Workshop on Molecular medicine of the gut, (1999, August)

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See detailRelationship between physical findings, rhinoscopy and computed tomography in nasal aspergillosis
Zonderland, J. L.; Saunders, J. H.; Clercx, Cécile ULg et al

in 6ème Congrès annuel de l'European Association of Veterinary Diagnostic Imaging - Vienne - Autriche - Juillet 1999 (1999, July)

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See detailInvestigation of fuel oil flames by means of Emission Spectroscopy
Ngendakumana, Philippe ULg

in 5th International Conference on Technologies and Combustion for a Clean Environment (1999, July)

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See detailA Measuring Device to Determine the Displacements of Buildings of Large Size
Latteur, Pierre ULg; Sine, Bernard

(1999, July)

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See detailEtude du rôle présomptif des souches atypiques du virus de la myxomatose dans l’étiologie des lésions du système respiratoire chez le lapin
Marlier, Didier ULg; Linden, Annick ULg; Mainil, Jacques ULg et al

in Proceedings of the 8èmes Journées de la Recherche Cunicole (1999, June 09)

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See detailNumerical simulation of shock-absorber devices for crashworthiness : explicit vs implicit formulation
Ponthot, Jean-Philippe ULg; Graillet, D.

in 32nd ISATA, International Symposium on Automotive Technology and Automation, special session on Automotive Crashworthiness, paper 99 SF004 (1999, June)

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See detailDetermination of optimal load shedding against voltage instability
Moors, Cédric; Van Cutsem, Thierry ULg

in Proc. 13th Power System Computation Conference (PSCC) (1999, June)

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See detailIsokinetic evaluation of ACL reconstruction. Surgical procedure influence and rehabilitation implications
Croisier, Jean-Louis ULg; Huskin, Jean-Pierre ULg; Crielaard, Jean-Michel ULg

in Abstract book of the 9th Transactions of the European Orthopaedic Research Society (1999, June)

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See detailUtilisation élémentaire d'un réseau de capteurs "SnO2" pour la reconnaissance d'odeurs environnementales
Nicolas, Jacques ULg; Romain, Anne-Claude ULg; Wiertz, Véronique et al

(1999, June)

Pouvoir identifier les mauvaises odeurs et les suivre en continu directement sur le terrain constituerait sans conteste un atout non négligeable pour un bon nombre d'études environnementales. Sur le ... [more ▼]

Pouvoir identifier les mauvaises odeurs et les suivre en continu directement sur le terrain constituerait sans conteste un atout non négligeable pour un bon nombre d'études environnementales. Sur le principe, un tel objectif semble correspondre parfaitement aux possibilités et à la souplesse d'un nez électronique. Cependant, si l'environnement est fréquemment cité parmi les applications possibles des nez électroniques, il faut reconnaître que les études visant la mesure des mauvaises odeurs sur le terrain restent très rares. La généralisation du concept du nez électronique au monitoring d'odeurs environnementales doit passer par la résolution d'un certain nombre de problèmes. La communication propose de mettre en évidence ces différentes limitations et problèmes. L'étude présentée pour illustrer ce propos est relative aux odeurs provenant de 5 sources typiques de l'environnement. Elle montre qu'un appareillage simple, utilisé sans grande précaution et sans trop se soucier de la reproductibilité des conditions d'échantillonnage parvient à identifier correctement l'origine des odeurs qu'on lui propose. [less ▲]

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See detailConstruir Imágenes. La enseñanza de la historia hispanoamericana a estudiantes de español.
Vanden Berghe, Kristine ULg

in van Esch, C.; Steenmeijer, M. (Eds.) 10e Symposium Spaans in Onderwijs, Onderzoek en Bedrijfsleven (1999, June)

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See detailBusiness failure prediction models : what is the theory looking for ?
Van Caillie, Didier ULg

in Proceeedings (Ed.) From day to day risks to crisis (1999, May 05)

This papers discusses the main trends emerging from the literature on business failure prediction and questions why and how a specific research dedicated to business failure prevention could emerge. The ... [more ▼]

This papers discusses the main trends emerging from the literature on business failure prediction and questions why and how a specific research dedicated to business failure prevention could emerge. The need for an explicit integration of global performance indicators and for failure paths characterizing major failure processes is also particularly stressed. [less ▲]

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See detailPhylogeography and taxonomy of woodmice (Apodemus sylvaticus) populations from Western Palearctic: RFLP of the mtDNA variability
Michaux, JR; Libois, Roland ULg; Ramalhinho, Maria da Graça et al

in Ylönen, Hannu; Hentonnen, Heikki; Laajalahti, Päivi (Eds.) et al 3rd European congress of mammalogy (1999, May)

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See detailTaking account of not motorized trips and road unsafety in a global urban development project
Hanocq, Philippe ULg

in Lombardo, Calabi, Scozzafava, Marchetti (Ed.) Développement soutenable du milieu urbain (1999, May)

This paper examines the ways to impulse some new urban policies and attitudes in favour of not motorized urban travel's modes.

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See detailRecent evolution of the status of the European mink (Mustela lutreola) and of the otter (Lutra lutra) in France.
Libois, Roland ULg; de Bellefroid, Marie des Neiges; Rosoux, René

in III International Symposium "Semiaquatische Säugetiere und ihre Lebenräume (1999, May)

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See detailFrom the germinal cells to the newborn animal: the transmission of genes and life through the generations
Drion, Pierre ULg; Scenzi, Otto; Ectors Francis et al

(1999, May)

During the last decade, the technology of reproduction progressed considerably leading to a certain availability of in vitro methods for fertilization, maturation of the oocyte and culture system for the ... [more ▼]

During the last decade, the technology of reproduction progressed considerably leading to a certain availability of in vitro methods for fertilization, maturation of the oocyte and culture system for the embryos. The most spectacular manipulations are cloning and transgenesis… This review focuses on the early appearance of the germinal cells precursors and the longstanding destiny of the gametes in mammals. The evident complexity and long-term programmation of events in gametes and early embryo explain the difficulties to succeed in in-vitro methods and the occurrence of unexpected alterations of development, e.g. embryonic or fetal mortalities, large weight newborn syndrome and other dys-regulations in imprinting or DNA transmission. “Studying and teaching the reproductive physiology in mammals, we sometimes imagine that a newborn animal survived two pregnancies: the first one would be a high risk pregnancy that represents the oocyte development and survival inside the follicle with a tetraploïd genome and the zona pellucida & cumulus cells as placenta-like structures. Around the first birth (ovulation), oocytes (individuals) accept in vitro conditions for maturation, fertilization and culture. Afterwards, a second pregnancy will be necessary in the mother or in the recipient uterus; a low risk pregnancy depending on the oocyte competence acquisition and on the conditions or length of exposure in vitro. “ [less ▲]

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See detailA propos de l'intervalle de confiance des indices d'aptitude Cp et Cpk
Barette, Ph.; Palm, Rodolphe ULg

in XXXIèmes Journées de Statistiques (1999, May)

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See detailThe role of bone sialoprotein in bone metastasis
Bellahcene, Akeila ULg; Waltregny, David ULg; Castronovo, Vincenzo ULg

in Skouteris, G. G.; Nicolson, G. L. (Eds.) Intermolecular Cross-Talk in Tumor Metastasis (1999, May)

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See detailDeconstructing the rational model : the case of mergers
Schoenaers, Frédéric ULg; Rondeaux, Giseline ULg

in collectif (Ed.) Proceedings of the Ninth European Congress on Work and Occupational Psychology (EAWOP) (1999, May)

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See detailUne méthode globale d'optmisation des treillis
Latteur, Pierre ULg; Samyn, Philippe

(1999, May)

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See detailTopology Optimization with Different Stress Limit in Tension and Compression
Duysinx, Pierre ULg

in Bloebaum, C. (Ed.) Proceedings of the 3rd World Congress of Structural and Multidisciplinary Optimization WCSMO3 (1999, May)

This report presents new progresses in topology optimization of continuum structures with stress constraints. One principal contribution consists in the consideration of equivalent stress criteria which ... [more ▼]

This report presents new progresses in topology optimization of continuum structures with stress constraints. One principal contribution consists in the consideration of equivalent stress criteria which can generalization of von Mises criterion and which are able to take into account non equal stress limits in tension and compression. A literature review led us to consider Raghava and Ishai criteria, which include a contribution of hydrostatic pressure. With the help of these criteria topology optimization can predict more realistic designs in which structural members are able to withstand better tension loads than compression loads, or vice-versa, as it is sometimes encountered in civil engineering or in composite material design. The implementation and sensitivity analysis aspects of Raghava and Ishai criteria in the Finite Element context are presented. We also present recent advanced developments to the solution of topology problems with stress constraints like the stress constraint relaxation technique and the numerical optimization procedure based on convex approximations and dual optimizers. Finally numerical applications will show the original character of the stress based topology designs ad versus compliance designs when there are unequal stress limits or when there are more than one load case. [less ▲]

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See detailCompressor and Turbine Blade Design by Optimization
Léonard, Olivier ULg; Rothilde, André; Duysinx, Pierre ULg

in Bloebaum, C. (Ed.) Proceedings of the 3rd World Congress of Structural and Multidisciplinary Optimization WCSMO3 (1999, May)

Compressor and turbine blade design involves thermodynamical, aerodynamical and mechanical aspects, resulting in an important number of iterations. Inverse methods and optimization procedures help the ... [more ▼]

Compressor and turbine blade design involves thermodynamical, aerodynamical and mechanical aspects, resulting in an important number of iterations. Inverse methods and optimization procedures help the designer in this long and eventually frustrating process. In this paper an optimization procedure is presented which solves two types of two-dimensional or quasi-three-dimensional problems: the inverse problem, for which a target velocity distribution is imposed, and a more global problem, in which the aerodynamic load is maximized. [less ▲]

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See detailAlmost Isotropic Perimeters in Topology Optimization: Theoretical and Numerical Aspects
Petersson, Joakim; Beckers, Muriel; Duysinx, Pierre ULg

in Bloebaum, C. (Ed.) Proceedings of the 3rd World Congress of Structural and Multidisciplinary Optimization WCSMO3 (1999, May)

We consider topology optimization of elastic continuum structures including a bound on the perimeter of the structural domain. Such a bound is known to ensure existence of solutions and it stabilizes the ... [more ▼]

We consider topology optimization of elastic continuum structures including a bound on the perimeter of the structural domain. Such a bound is known to ensure existence of solutions and it stabilizes the behavior of numerical finite element (FE) solutions. However the straightforward way of calculating the perimeter is rotationally mesh-dependent. In this paper we present new perimeter formulae with weaker rotational dependence i.e. perimeters that are almost isotropic. An overview of some theoretical results as well as numerical tests are given. [less ▲]

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See detailAerodynamic and Mechanical Design of Compressor Blades Including Static Analysis
Adam, Olivier; Marin, Frédéric; Essers, Jean-André ULg et al

in Proceedings od the 3rd World Congress of Structural and Multidisciplinary Optimization (1999, May)

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See detailInfluence des facteurs familiaux sur la motivation scolaire des enfants de 1re primaire
de Landsheere, Viviane ULg; Hindryckx, Geneviève ULg; Schockert, Catherine

in Actes du 7e Congrès international de l'Association internationale pour la formation et la recherche en éducation familiale (1999, April)

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See detailALE Methods for Stationary Solutions of Metal Forming Processes
Boman, Romain ULg; Ponthot, Jean-Philippe ULg

in Covas, J. A. (Ed.) Proceedings of the Second ESAFORM Conference on Material Forming (1999, April)

In this paper, two efficient convection algorithms are briefly presented in order to update the value stored at the Gauss point during the Eulerian step of an Arbitrary Lagrangian Eulerian computation in ... [more ▼]

In this paper, two efficient convection algorithms are briefly presented in order to update the value stored at the Gauss point during the Eulerian step of an Arbitrary Lagrangian Eulerian computation in solid mechanics. They are based on the finite volume method and on the Streamline Upwind Petrov Galerkin method. An application to cold rolling process is presented. [less ▲]

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See detailIntérêt de l'évaluation isocinétique du genou gonarthrosique
Henrotin, Yves ULg; Croisier, Jean-Louis ULg; Dumont, R. et al

in Actes de la 2e Journée Belge d'Isocinétisme (1999, March 20)

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See detailIndications et modalités de la rééducation isocinétique de l'épaule
Forthomme, Bénédicte ULg; Croisier, Jean-Louis ULg; Namurois, Marie-Hélène ULg et al

in Actes de la 2e Journée Belge d'Isocinétisme (1999, March 20)

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See detailProtocoles excentriques appliqués aux tendinites rotuliennes
Croisier, Jean-Louis ULg; Godon, Bernard ULg; Giordano, F. et al

in Actes de la 2e Journée Belge d'Isocinétisme (1999, March 20)

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See detailSignification des épreuves isocinétiques de résistance à la fatigue
Croisier, Jean-Louis ULg; Orban, O.; Crielaard, Jean-Michel ULg

in Actes de la 2e Journée Belge d'Isocinétisme (1999, March 20)

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See detailUse of bidirectional reflectance distribution function in a particle tracing method
Dindart, Jean-François; Embrechts, Jean-Jacques ULg; Sémidor, Catherine

in Proceedings of the 2nd Convention Forum Acusticum (1999, March)

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See detailEtat d'avancement de la recherche en conseil de fumure azotée en froment d'hiver
Maes, N.; Franc, Jean; Herman, Jean-Luc et al

in Fumure et protection phytosanitaire des céréales (1999, February 24)

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See detailPrincipes de base pour une bonne utilisation des fongicides à base de strobilurines
Meeùs, Patrick; Bodson, Bernard ULg

in Fumure et protection phytosanitaire des céréales (1999, February 24)

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See detailLes froments hybrides: une phytotechnie adaptée
Franc, Jean; Couvreur, Luc; Bodson, Bernard ULg et al

in Fumure et protection phytosanitaire des céréales (1999, February 24)

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See detailLes traitements régulateurs à base de CCC: du nouveau!
Bodson, Bernard ULg; Weickmans, Bernard; Haquenne, W.

in Fumure et protection phytosanitaire des céréales (1999, February 24)

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See detailLa diminution des intrants dans la production des céréales
Roisin, Christian; Goffart, Jean-Pierre; Frankinet, Marc et al

in Fumure et protection phytosanitaire des céréales (1999, February 24)

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See detailLa comparaison des systèmes européens de production du blé d'hiver
Falisse, André; Bodson, Bernard ULg

in Fumure et protection phytosanitaire des céréales (1999, February 24)

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See detailLes conseils de fumure azotée
Bodson, Bernard ULg; Herman, Jean-Luc; Destain, Jean-Pierre ULg et al

in Fumure et protection phytosanitaire des céréales (1999, February 24)

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See detailElaboration de méthodes indirectes de criblage des animaux traités par des substances à effet anabolisant.
Bertozzi, Carlo; Portetelle, Daniel ULg; Vleurick, Lieve et al

in Quatrième Carrefour des Productions animales : Les démarches de qualité en production de viandes : Pourquoi ? Pour qui ? (1999, January 27)

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See detailTraçabilité & Identification : les maîtres mots du contrôle des maladies et de la qualité des produits d’origine animale
Mortiaux, Frédéric; Botton, Y.; Collaux, J. C. et al

in Quatrième Carrefour des Productions animales : Les démarches de qualité en production de viandes : Pourquoi ? Pour qui ? (1999, January 27)

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See detailTraçabilité en spéculation porcine par la méthode des empreintes génétiques
Portetelle, Daniel ULg; Pevenage, Sabine; Mortiaux, Frédéric et al

in Quatrième Carrefour des Productions animales : Les démarches de qualité en production de viandes : Pourquoi ? Pour qui ? (1999, January 27)

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See detailPanorama des démarches qualité : à chaque stratégie son outil.
Sindic, Marianne ULg; Fumière, Olivier; Romnée, Jean-Michel et al

in Quatrième Carrefour des Productions animales : Les démarches de qualité en production de viandes : Pourquoi ? Pour qui ? (1999, January 27)

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See detailUnified lubricated and dry friction modeling by an extension of the radial return scheme
Ponthot, Jean-Philippe ULg

in Seventh International Symposium on Plasticity and its current applications: special session on « Computational Modeling of Frictional Contact Processes (1999, January)

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See detailDéveloppement d’un modèle intégré d’optimisation des structures navales et hydrauliques
Rigo, Philippe ULg

in Revue Construction Métallique, Rubrique Thèses, n°1-1999, (1999, January)

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See detailTraitement différencié des élèves en éducation physique. Solutions proposées par des enseignants en réponse à diverses situations
Cloes, Marc ULg; Demblon, Sarah; Pirottin, Véronique et al

in Carlier Ghislain, Renard, Jean-Pierre (Ed.) Actes du colloque AFRAPS-EDPM "Identifier les effets de l'intervention en motricité humaine" (1999)

Tout apprenant présente des caractéristiques cognitives, affectives, physiques et sociales qui en font une personne unique. Dans l'enseignement en classe comme en éducation physique, les particularités ... [more ▼]

Tout apprenant présente des caractéristiques cognitives, affectives, physiques et sociales qui en font une personne unique. Dans l'enseignement en classe comme en éducation physique, les particularités des apprenants dans chacun de ces domaines se combinent et influencent le processus éducatif et son efficacité. En effet, elles constituent autant d'agents médiateurs entre l'action du professeur et son apport aux élèves. Chacun étant sensible à des stimuli personnels, il apparaît indispensable que les enseignants identifient et tiennent compte des différences interindividuelles de leurs élèves. Les programmes de cours et les lignes directrices des institutions éducatives mettent l'accent sur cette nécessité. Il convient dès lors de déterminer quelles sont les démarches individualisées, utilisées et exploitées par les praticiens. Elles exigent une meilleure compréhension des stratégies mises en oeuvre et visent, à terme, l'exploitation des résultats dans les formations professionnelles initiales et continuées. ... [less ▲]

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See detailProgress in the modelization of light reflection for lighting calculations
Embrechts, Jean-Jacques ULg

in Proceedings of the 24th Session of the C.I.E. , CIE Publication n°133-Part 1 (1999)

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See detailArtefakttolerante Regelungen für die Anästhesie
Frei, C. W.; Bullinger, Eric ULg; Sieber, T. et al

in Fortschritts-Berichte VDI, Reihe 17, Nr. 183 AUTOMED '99, Beiträge zum Workshop `Automatisierungstechnische Verfahren für die Medizin' (1999)

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See detailReconciliation of visual charts and image analysis in measuring the abrasion of particles
Pirard, Eric ULg

in Proceedings BioGeoVision 99 (1999)

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See detailEffects of sunshine/rain cycles on the behaviour of repairing systems
Courard, Luc ULg; Degeimbre, Robert ULg; Darimont, Anne ULg et al

in Ohama, Y.; Puterman, M. (Eds.) Adhesion between polymers and concrete (1999)

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See detailModal image analysis of metallic sulphides in core samples - a critical test of the methodology
Castroviejo, Ricardo; Lopez, Antonio; Muzquiz, Carlos et al

in Proceedings of GeoVision 99 (1999)

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See detailAnalyse de l'effet de tassements sur le comportement d'une géomembrane en PEHD
Courard, Luc ULg; Dauge, Laurent

in Girard, H.; Gourc, Jean-Pierre (Eds.) Compte-rendu des rencontres 97 (1999)

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See detailData mining tools and application in power system engineering
Olaru, Cristina; Geurts, Pierre ULg; Wehenkel, Louis ULg

in Proceedings of the 13th Power System Computation Conference, PSCC99 (1999)

The power system field is presently facing an explosive growth of data. The data mining (DM) approach provides tools for making explicit some implicit subtle structure in data. Applying data mining to ... [more ▼]

The power system field is presently facing an explosive growth of data. The data mining (DM) approach provides tools for making explicit some implicit subtle structure in data. Applying data mining to power system engineering is an iterative and interactive process, requiring an acquainted user with the application specifics. The paper describes data mining tools like statistical methos, visualization, machine learning and neural networks, exemplifying by results obtained with a DM software developed for dynamic security assessment studies. Power system engineering applications where data mining would be useful are reviewed in the second part of the paper. [less ▲]

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See detailVertical column abundances of COF2 above the Jungfraujoch Station: update and consolidation of the database with measurements in the nu4 band region.
Mélen, Francine; Mahieu, Emmanuel ULg; Demoulin, Philippe ULg et al

in Atmospheric Spectroscopy Applications 1999 - Proceedings (1999)

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