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See detailPerturbative QCD
Ivanov, Igor ULg

in Naumov, Dmitry; Vall, Alexander (Eds.) Proceedings of the X Baikal Summer School On Physics Of Elementary Particles And Astrophysics (2011)

These lectures, intended mainly for undergraduates, contain a very short introduction into perturbative QCD. We introduce the QCD lagrangian, outline how QCD is quantized and renormalized, and as an ... [more ▼]

These lectures, intended mainly for undergraduates, contain a very short introduction into perturbative QCD. We introduce the QCD lagrangian, outline how QCD is quantized and renormalized, and as an example describe the calculation of the elastic two-gluon scattering. We then discuss the physics behind the parton model of hadron collisions, with the important issues of the infrared safety and factorization. We end with a short description of how different hadronic final states are searched for and studied at hadron colliders. [less ▲]

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See detailPerturbative QCD corrections to the soft pomeron
Cudell, Jean-René ULg; Margolis, B.

in MRST Meeting 1992 (1992)

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See detailThe Perturbed Generalized Proximal Point Algorithm
Alexandre, Patrick; Nguyen, Van Hien; Tossings, Patricia ULg

E-print/Working paper (1996)

During the last years, different modifications were introduced in the proximal point algorithm developed by R.T. Rockafellar for searching a zero of a maximal monotone operator on a real Hilbert space. We ... [more ▼]

During the last years, different modifications were introduced in the proximal point algorithm developed by R.T. Rockafellar for searching a zero of a maximal monotone operator on a real Hilbert space. We combine these modifications to get a new version of this algorithm. We take simultaneously into account a variable metric, a perturbation and a kind of relaxation. Our work takes place in the context of the variational convergence theory. [less ▲]

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See detailThe Perturbed Generalized Proximal Point Algorithm
Alexandre, Patrick; Nguyen, Van Hien; Tossings, Patricia ULg

in RAIRO : Modélisation Mathématique et Analyse Numérique (Mathematical Modelling and Numerical Analysis) (1998), 32(2), 223-253

During the last years, different modifications were introduced in the proximal point algorithm devloped by R.T. Rockafellar for searching a zero of a maximal monotone operator on a real Hilbert space. We ... [more ▼]

During the last years, different modifications were introduced in the proximal point algorithm devloped by R.T. Rockafellar for searching a zero of a maximal monotone operator on a real Hilbert space. We combine these modifications to get a new version of this algorithm. We take simultaneously into account a variable metric, a perturbation and a kind of relaxation. Our work takes place in the context of the variational convergence theory. [less ▲]

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See detailThe Perturbed Proximal Point Algorithm and Some of its Applications
Tossings, Patricia ULg

in Applied Mathematics & Optimization (1994), 29(2), 125-159

Following the works of R.T. Rockafellar, to search for a zero of a maximal monotone operator, and of B. Lemaire, to solve convex optimization problems, we present a perturbed version of the proximal point ... [more ▼]

Following the works of R.T. Rockafellar, to search for a zero of a maximal monotone operator, and of B. Lemaire, to solve convex optimization problems, we present a perturbed version of the proximal point algorithm. We apply this new algorithm to convex optimization and to variational inclusions or, more particularly, to variational inequalities. [less ▲]

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See detailPerturbed Proximal Point Algorithm with Nonquadratic Kernel
Brohé, Myrana; Tossings, Patricia ULg

E-print/Working paper (1998)

Let H be a real Hilbert space and T be a maximal monotone operator on H. A well-known algorithm, developed by R.T. Rockafellar, for solving the problem "To find x in H such that 0 in Tx" is the proximal ... [more ▼]

Let H be a real Hilbert space and T be a maximal monotone operator on H. A well-known algorithm, developed by R.T. Rockafellar, for solving the problem "To find x in H such that 0 in Tx" is the proximal point algorithm. Several generalizations have been considered by several authors: introduction of a perturbation, introduction of a variable metric in the perturbed algorithm, introduction of a pseudo-metric in place of the classical regularization, ... We summarize several of these extensions by taking into account a pseudo-metric as regularization and a perturbation in an inexact version of the algorithm. [less ▲]

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See detailPerturbed Proximal Point Algorithm with Nonquadratic Kernel
Brohé, Myrana; Tossings, Patricia ULg

in Serdica Mathematical Journal (2000), 26

Let H be a real Hilbert space and T be a maximal monotone operator on H. A well-known algorithm, developed by R.T. Rockafellar, for solving the problem "To find x in H such that 0 in Tx" is the proximal ... [more ▼]

Let H be a real Hilbert space and T be a maximal monotone operator on H. A well-known algorithm, developed by R.T. Rockafellar, for solving the problem "To find x in H such that 0 in Tx" is the proximal point algorithm. Several genaralizations have been considered by several authors: introduction of a perturbation, introduction of a variable metric in the perturbed algorithm, introduction of a pseudo-metric in place of the classical regularization, ... We summarize some of these extensions by taking into account a pseudo-metric as regularization and a perturbation in an inexact version of the algorithm. [less ▲]

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See detailThe Perturbed Tikhonov's Algorithm and Some of its Applications
Tossings, Patricia ULg

in RAIRO : Modélisation Mathématique et Analyse Numérique (Mathematical Modelling and Numerical Analysis) (1994), 28(2), 189-221

The proximal point algorithm has known these last years many developments connected with the expansion of the variational convergence theory. Motivated by this fact and inspired by the work of A. Tikhonov ... [more ▼]

The proximal point algorithm has known these last years many developments connected with the expansion of the variational convergence theory. Motivated by this fact and inspired by the work of A. Tikhonov and V. Arsénine in the context of convex optimization, we present a new algorithm for searching a zero of a maximal monotone operator on a real Hilbert space. We study the perturbed version of this algorithm and establish a critical comparison with the perturbed proximal point algorithm. We apply this new algorithm to convex optimization and to variational inclusions or, more particularly, to variational inequalities. [less ▲]

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See detailThe Perturbed Tikhonov's Algorithm with Nonquadratic Kernel and some of its Applications
Brohé, Myrana; Tossings, Patricia ULg

E-print/Working paper (2001)

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See detailPertussis in adulthood: report of two cases and review of the literature.
Poirrier, Anne-Lise ULg; Gillard, Noelle ULg; Lefèbvre, Philippe ULg et al

in Laryngoscope (2009), 119(9), 1720-2

Whooping cough is resurgent in the developed world. Systematic vaccination has changed its epidemiology, with the majority of cases now primarily affecting adolescents and adults. A 46-year-old male ... [more ▼]

Whooping cough is resurgent in the developed world. Systematic vaccination has changed its epidemiology, with the majority of cases now primarily affecting adolescents and adults. A 46-year-old male physiotherapist presented with a 1-week history of bothersome cough and respiratory difficulties, and a 51-year-old man was admitted to the emergency department with a 4-week history of increasing cough and dyspnea. Polymerase chain reaction of nasopharyngeal swab were positive for Bordetella pertussis. These cases illustrate pertussis in adulthood. We review the clinical features, the prevalence, the diagnostic tools, and the management of the patients and their relatives to increase awareness of this highly contagious disease. [less ▲]

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See detailPervichnoe rastcheplenie v verkhnepaleoliticheskoï industrii stoyanki Kulbulak (Uzbekistan)
Kolobova, K.A.; Flas, Damien ULg; Krivoshapkin, A.I. et al

in Derevianko, A.P.; Shunkov, M.V. (Eds.) The earliest human migrations in Eurasia (2009)

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See detailLa PESC à l'épreuve de la crise irakienne
Petermann, Simon ULg; Matagne, Geoffroy ULg

in La cittadinanza europea (2003)

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See detailPesce, Gaetano
Prina, Daniela ULg

in Atkinson, Harriet; Edwards, Clive; Kettley, Sarah (Eds.) et al Encyclopedia of Design (in press)

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See detailLa PESD après l'échec constitutionnel européen
Dumoulin, André ULg

in Sur, Serge (Ed.) Annuaire français de relations internationales 2006 (2006)

La crise autour du Traité constitutionnel a épargné la Politique européenne de sécurité et de défense. Le Conseil européen va devoir néanmoins récupérer certaines avancées de la PESD qui avait été ... [more ▼]

La crise autour du Traité constitutionnel a épargné la Politique européenne de sécurité et de défense. Le Conseil européen va devoir néanmoins récupérer certaines avancées de la PESD qui avait été introduite directement dans ce document à haute valeur symbolique. Au-delà d’une visibilité pragmatique de l’UE en matière de missions civilo-militaires, la PESD pourrait être autant soutenue que fragilisée par de nouvelles configurations organiques imposées par les événements institutionnels européens : structure de coopération ad hoc, noyaux durs, cercles thématiques, union dans l’union. Toutes configurations qui complexifient la lecture d’une Union européenne « sans frontières ». [less ▲]

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See detailLa PESD autour du sommet de Strasbourg-Kehl
Dumoulin, André ULg

in revue de Défense nationale (2009)

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See detailPésentation du Professeur Eugenio Amato
Rochette, Bruno ULg

Diverse speeche and writing (2014)

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See detailLa pessière wallonne en chiffres
Rondeux, Jacques ULg; Lecomte, Hugues; Toussaint, André ULg

Book published by Faculté des Sciences Agronomiques (1984)

A timber inventory based upon a systematic sampling has been realized (1980-1983) in the south part of Belgium. Among the main results which are now available it can be observed that spruce stands (Picea ... [more ▼]

A timber inventory based upon a systematic sampling has been realized (1980-1983) in the south part of Belgium. Among the main results which are now available it can be observed that spruce stands (Picea Abies KARST) represent 37 % (~ 197.000 hectares) of the Wallonian forest. These one are especially belonging to private owners (56,2 %). The distribution of spruce areas by age classes indicates that there are larger areas in the lower age classes (~~50 % inferior to 30 years). Original informations dealing with the spruce stands are also given such as : area distribution by altitude and slope classes, volume by girth classes, estimated areas by site classes. [less ▲]

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See detailLa pessière wallonne en chiffres
Rondeux, Jacques ULg; Lecomte, Hugues; Toussaint, André ULg

in Bulletin de la Société Royale Forestière de Belgique = Tijdschrift van de Koninklijke Belgische Bosbouwmaatschappij (1984), 91(3), 89-98

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See detailLa pessière wallonne: son évolution entre 1980 et 1990.
Lecomte, H.; Rondeux, Jacques ULg; Hebert, Jacques ULg

in Silva Belgica (1992), 99(4), 7-14

Au début des années 1980, un inventaire des forêts wallonnes a été réalisé en vue de dresser rapidement, par échantillonnage systématique, un état aussi objectif que possible des ressources ligneuses ... [more ▼]

Au début des années 1980, un inventaire des forêts wallonnes a été réalisé en vue de dresser rapidement, par échantillonnage systématique, un état aussi objectif que possible des ressources ligneuses régionales, principalement en termes de surfaces et de volumes sur pied. En 1990, en vue d’actualiser les données, un nouvel inventaire a été effectué sur un sous-échantillon du précédent. La présente étude fournit, dans une large mesure, une mise à jour des données relatives aux peuplements d’épicéa commun (Picea abies (L.) KARST) et publiées dans un document intitulé « La pessière wallonne en chiffres » (RONDEUX et al., 1984b). Elle devrait aussi permettre de construire un modèle mathématique de prévision de la production d’épicéa pour les années à venir. Dans les lignes qui suivent, après avoir justifié le bien-fondé de pareille étude (paragraphe 2), nous décrirons la méthode d’analyse que nous avons utilisée (paragraphe 3). Nous présenterons ensuite les principaux résultats obtenus (paragraphe 4). Nous terminerons par quelques considérations relatives à la situation actuelle des pessières concernées ainsi qu’aux principales raisons qui la sous-tendent (paragraphe 5). [less ▲]

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