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See detailHurricane Simulation on Power Transmission Line
Lilien, Jean-Louis ULg; Snegovski, Dmitri; Capelle, Thierry ULg

in Proceedings of the 5th International Conference on Cable Dynamics (2003, September)

The hurricane winds are characterized by high speeds, at which the « drag crisis » regime of flow around cable is achievable. That is why, in the calculation of the wind-induced movement of the overhead ... [more ▼]

The hurricane winds are characterized by high speeds, at which the « drag crisis » regime of flow around cable is achievable. That is why, in the calculation of the wind-induced movement of the overhead transmission line during hurricane, it is important to represent the cable aerodynamic drag as Reynolds-dependent. In order to assess the behaviour and fatigue resistance of the transmission line conductor under hurricane conditions, the Reynolds-dependent drag coefficient was introduced in the SAMCEF Mecano finite-element software. To represent the hurricane wind loading, the turbulent, spatially non-uniform wind model was used. Results of comparative study of the smooth cable AERO-Z and the classical multistrand cable, including the percentage of load reduction offered to supporting structure, are presented. [less ▲]

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See detailHusserl : du désintéressement kantien au désintérêt pour la photographie
Steinmetz, Rudy ULg

in Etudes Phénoménologiques (2005)

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See detailHusserl and Hilbert : theory of formal systems
Leclercq, Bruno ULg

Conference (2002, June 22)

Le souci constamment affiché par le fondateur de la phénoménologie de développer une théorie de la constitution des idéalités mathématiques dans les vécus de conscience, mais aussi l'importance accordée ... [more ▼]

Le souci constamment affiché par le fondateur de la phénoménologie de développer une théorie de la constitution des idéalités mathématiques dans les vécus de conscience, mais aussi l'importance accordée dans l'oeuvre husserlienne à l'intuition catégoriale, ont souvent incité les commentateurs à rapprocher la philosophie des mathématiques de Husserl de l'intuitionnisme brouwerien. Certains des plus proches disciples de Brouwer, tels Hermann Weyl ou Arend Heyting, se sont d'ailleurs explicitement revendiqués des analyses de Husserl pour compléter ou renforcer leurs propres positions intuitionnistes. Réciproquement, on sait quel intérêt le phénoménologue Oskar Becker a marqué pour les travaux de l'école intuitionniste. Identifier les philosophies intuitionniste et phénoménologique des mathématiques serait cependant occulter tout ce qui, dans les travaux de Husserl, le rapproche bien davantage de Hilbert que de Brouwer. Héritier sur ce point de Bolzano davantage que de Kant, Husserl est en effet en mathématiques un penseur de l’analytique plus que du synthétique, des rapports déductifs entre énoncés plus que des constructions des concepts. Comme chez l'auteur de la Wissenschaftslehre, ce sont les systèmes formels qui constituent la principale préoccupation de Husserl, et ce dès la Philosophie de l'arithmétique - dont la thèse fondamentale est précisément l'impossibilité de produire l'ensemble de l'arithmétique par construction - et jusqu'aux recherches génétiques des années 1920-1930 - qui continuent de distinguer explicitement la question de la genèse des concepts de celle de leur validation objective, qu’elle soit empirique ou, comme en mathématiques, purement formelle. On sait combien la proximité de Husserl et Hilbert à Göttingen aux alentours du changement de siècle fut stimulante pour la réflexion des deux mathématiciens sur la fondation de leur discipline, et notamment pour l'investigation de certaines notions métamathématiques comme celles de consistance, de catégoricité et de complétude. Si c'est au seul génie de Hilbert que revient d'avoir développé de manière rigoureuse le projet d'une fondation formaliste des mathématiques, Husserl, dont les préoccupations prirent quant à elles une tournure philosophique plus générale, ne manqua cependant pas de se référer à ce même projet à chaque fois qu'il revint sur la question plus spécifique des objets mathématiques. [less ▲]

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See detailHusserl et l'esthétique. Exposé introductif à une table ronde
Steinmetz, Rudy ULg

Diverse speeche and writing (2012)

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See detail« Husserl et les limites du modèle intentionnaliste de la conscience »
Gyemant, Maria ULg

in Studia Europeae (2010), LV(3), 63-87

This paper aims to ask the question whether, in Husserl’s perspective, all consciousness is intentional and to explore the alternatives. Thus, we have proceeded to a thorough analysis of Husserl’s texts ... [more ▼]

This paper aims to ask the question whether, in Husserl’s perspective, all consciousness is intentional and to explore the alternatives. Thus, we have proceeded to a thorough analysis of Husserl’s texts concerning temporality and the rather bizarre type of intentionality that it implies. The examining of this intentionality that Husserl calls “longitudinal intentionality” has brought us to the conclusion that its intentional character incomprehensible unless we change our very concept of intentionality which cannot be anymore that of an object-relation, as it were defined in the Logical Investigations. It is, therefore, the very limit of intentionality that is revealed by our questioning the time-consciousness in Husserl. [less ▲]

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See detailHusserl et Merleau-Ponty : le partage du réel et de l'imaginaire
Steinmetz, Rudy ULg

in Mosaïque. Hommages à Pierre Somville (2007)

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See detailHusserl et Wittgenstein, critiques de la philosophie moderne de la représentation
Leclercq, Bruno ULg

Conference (2001, April 10)

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See detailHusserl, Frege et Hilbert. Théorie des systèmes formels
Leclercq, Bruno ULg

in Brisart, Robert; Benoist, Jocelyn; Lavigne, Jean-François (Eds.) Penser aujourd'hui avec Husserl : La phénoménologie transcendantale et son contexte (2013)

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See detailHusserl, Freud et la position de l’inconscient
Gyemant, Maria ULg

Conference (2011, February 19)

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See detailHusserl, Leroi-Gourhan et la préhistoire
de Villers Grand Champs, Bénédicte ULg

Book published by Petra (2010)

D’optique philosophique, cet ouvrage est une mise en perspective de deux auteurs que tout semble séparer : Edmond Husserl, père d’une phénoménologie transcendantale de la conscience, et André Leroi ... [more ▼]

D’optique philosophique, cet ouvrage est une mise en perspective de deux auteurs que tout semble séparer : Edmond Husserl, père d’une phénoménologie transcendantale de la conscience, et André Leroi-Gourhan, ethnologue et préhistorien. Une fois opérées les mises au point méthodologiques de rigueur, un dialogue s’établit entre Husserl et Leroi-Gourhan autour des « objets de la préhistoire » : ossements, cailloux taillés, traces d’ocre, de feu, d’habitats, objets gravés ou peints. Procédant par « zigzags », de la phénoménologie à la préhistoire et inversement, Bénédicte de Villers entend se tenir au plus près de la matérialité de ces objets préhistoriques et les décrire. En même temps, ceux-ci s’avèrent les seuls indices de subjectivités humaines d’autrefois et de leurs cultures. L’ambivalence des objets de la préhistoire constitue donc aussi toute leur richesse. L’« ontologie préhistorique » qui se construit dans ces pages, à la croisée des perspectives phénoménologiques et préhistoriques, vise ainsi à poser d’une façon originale la question de la « différence anthropologique » et des origines de l’homme. [less ▲]

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See detailHusserl, Twardowski et la question des objets intentionnels
Gyemant, Maria ULg

Conference (2008, May 28)

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See detailHutte ou terrier ?
Libois, Roland ULg

Learning material (2005)

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See detailHuwelijksvermogensrecht - Droit des régimes matrimoniaux (art. 1387-1479)
Leleu, Yves-Henri ULg

in Baeteman, G. (Ed.) Edition cumulative du Code civil belge (2004)

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See detailHuy / Ben Ahin : sondage dans l'abri de "Werleu II"
Noiret, Pierre ULg

in Chronique de l'Archéologie Wallonne (2013), 20

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See detailHuy / Ben Ahin : sondage dans le "Grand Abri"
Noiret, Pierre ULg; Flas, Damien ULg

in Chronique de l'Archéologie Wallonne (2013), 20

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See detailHuybrechts, Albert
Pirenne, Christophe ULg

in Nouvelle Biographie Nationale (1999)

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See detailHuygens attitude reconstruction based on flight engineering parameters
Perez-Ayucar, Miguel; Sarlette, Alain ULg; Couzin, Patrice et al

Conference (2005, June)

Huygens is ESA’s main contribution to the joint NASA/ESA/ASI Cassini/Huygens mission to Saturn and its largest moon Titan. The Probe, delivered to the interface altitude of 1270 km above the surface by ... [more ▼]

Huygens is ESA’s main contribution to the joint NASA/ESA/ASI Cassini/Huygens mission to Saturn and its largest moon Titan. The Probe, delivered to the interface altitude of 1270 km above the surface by NASA/JPL Cassini orbiter, entered the dense atmosphere of Titan on 14 January 2005 and landed on the surface after a descent under parachute of slightly less than 2.5 hours. Huygens continued to function after landing for more than 3 hours. Data was transmitted and successfully recovered by Cassini continuously during the parachute descent and for 72 minutes on the surface. Although the Huygens attitude reconstruction based on the flight engineering parameters was not foreseen during the development phase (no gyros were included), a rough descent under parachute and indications of an anomaly in the probe spin direction make the engineering dataset valuable in the frame of the ADRS (Huygens Attitude Determination and Reconstruction Subgroup) as a complement to the scientific measurements. In addition, several scientific teams have a strong interest in understanding the orientation of the probe for interpreting their data, as DISR (Descent Imager and Spectral Radiometer) and HASI-PWA (Huygens Atmospheric Structure Instrument-Permeability, Wave and Altimetry). In this paper we describe the engineering parameters used for the Probe attitude reconstruction (Clausen et al., 2002), namely the radio link AGC (Automatic Gain Control), RASU and CASU (Radial and Central Accelerometer Sensor Units) and RAU (Radar Altimeter Unit). We explain the methodology applied to indirectly infer the attitude information from the measurements of these sensors. We also discuss and present the reconstructed information related to attitude: spin rate and azimuthal position (during the atmospheric descent), and landing orientation. Tip and tilt implications are still being worked at the time of writing. Preliminary data on their behavior is presented. [less ▲]

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See detailHuysmans avec Schopenhauer. Le pessimisme d'A rebours
Steinmetz, Rudy ULg

in Romantisme (1988)

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See detailHVDC control strategies to improve transient stability in interconnected power systems
Hazra, Jagabondhu; Phulpin, Yannick; Ernst, Damien ULg

in Proceedings of the 2009 IEEE Bucharest PowerTech (2009)

This paper presents three HVDC modulation strategies to improve transient stability in an interconnected power system. AC variables such as rotor speeds, voltage phasors, and tieline power flows are used ... [more ▼]

This paper presents three HVDC modulation strategies to improve transient stability in an interconnected power system. AC variables such as rotor speeds, voltage phasors, and tieline power flows are used as input to the controller that modifies the power flow settings through the HVDC-links. The proposed techniques are tested on the IEEE 24-Bus reliability test system and critical clearing times obtained for several contingencies are analyzed. The paper shows that HVDC modulation can lead to substantial improvement in transient stability. [less ▲]

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See detailHybrid Acceleration using Real Vector Automata
Boigelot, Bernard ULg; Herbreteau, Frédéric; Jodogne, Sébastien ULg

in Lecture Notes in Computer Science (2003, July), 2725

This paper addresses the problem of computing an exact and effective representation of the set of reachable configurations of a linear hybrid automaton. Our solution is based on accelerating the state ... [more ▼]

This paper addresses the problem of computing an exact and effective representation of the set of reachable configurations of a linear hybrid automaton. Our solution is based on accelerating the state-space exploration by computing symbolically the repeated effect of control cycles. The computed sets of configurations are represented by Real Vector Automata (RVA), the expressive power of which is beyond that of the first-order additive theory of reals and integers. This approach makes it possible to compute in finite time sets of configurations that cannot be expressed as finite unions of convex sets. The main technical contributions of the paper consist in a powerful sufficient criterion for checking whether a hybrid transformation (i.e., with both discrete and continuous features) can be accelerated, as well as an algorithm for applying such an accelerated transformation on RVA. Our results have been implemented and successfully applied to several case studies, including the well-known leaking gas burner, and a simple communication protocol with timers. [less ▲]

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