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See detailA generic approach for solving nonlinear-discrete security-constrained power flow problems in large-scale systems
Platbrood, Ludovic; Capitanescu, Florin; Crisciu, Horia et al

in IEEE Transactions on Power Systems (in press)

This paper proves the practicality of an iterative algorithm for solving realistic large-scale SCOPF problems. This algorithm is based on the combination of a contingency filtering scheme, used to ... [more ▼]

This paper proves the practicality of an iterative algorithm for solving realistic large-scale SCOPF problems. This algorithm is based on the combination of a contingency filtering scheme, used to identify the binding contingencies at the optimum, and a network compression method, used to reduce the complexity of the post-contingency models included in the SCOPF formulation. We show that by combining these two complementary ideas, it is possible to solve in a reasonable time SCOPF problems on large power system models with a large number of contingencies. Unlike most results reported for large-scale SCOPF problems, our algorithm uses a non-linear AC network model in both pre-contingency and post-contingency states, optimizes both active/reactive powers flows jointly, and treats the discrete variables. The proposed algorithm is implemented with state-of-the-art solvers and applied to two systems: a national grid with 2563 buses and 1297 contingencies, and a model of the European transmission network with 9241 buses and 12000 contingencies. [less ▲]

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See detailNon-isothermal moisture balance equation in porous media: a review of mathematical formulations in Building Physics
Dubois, Samuel ULg; Lebeau, Frédéric ULg; Evrard, Arnaud ULg

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (in press)

Understanding heat and mass transfers in porous materials is crucial in many areas of scientific research. Mathematical models have constantly evolved, their differences lying mainly in the choice of the ... [more ▼]

Understanding heat and mass transfers in porous materials is crucial in many areas of scientific research. Mathematical models have constantly evolved, their differences lying mainly in the choice of the driving potentials used to describe moisture flows, as well as in the complexity of characterizing the physical phenomena involved. Models developed in the field of Building Physics (HAM models) are used to describe the behavior of envelope parts and assess their impact on user comfort and energy performance. The water balance equation can be described in many ways; it is a function of the boundary conditions considered and the fact they induce high or low water content in the porous materials used. This paper gives an overview of various formulations for this equation that are found in the Building Physics literature. It focuses first on the physically based formulation of moisture balance, drawing on the Representative Elementary Volume (REV) concept, coupled with thermodynamic flow rates description. This is then reformulated in line with various main moisture state variables offering a wide variety of expressions that are compared with available models. This approach provides access to all secondary transport coefficients associated with the process of mathematical transformation. Particular emphasis is placed on the moisture storage function choice and its impact on the final mathematical formulations. [less ▲]

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See detailWorking memory deficits in developmental dyscalculia: the importance of serial order.
Attout, Lucie ULg; Majerus, Steve ULg

in Child Neuropsychology : A Journal on Normal & Abnormal Development in Childhood & Adolescence (in press)

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See detailLa fin du Paléolithique moyen dans le Nord de l’Europe : la question des origines du Lincombien-Ranisien-Jerzmanowicien
Flas, Damien ULg

in Depaepe, Pascal (Ed.) Les plaines du Nord-Ouest : carrefour de l’Europe au Paléolithique moyen ? (in press)

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See detailSens et signification dans l'esthétique de Mallarmé
Durand, Pascal ULg

in Signata. Annales des Sémiotiques = Annals of Semiotics (in press), 5

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See detailProteins in the gas phase
Meyer, Tim; Gabelica, Valérie ULg; Grubmüller, Helmut et al

in Wiley Interdisciplinary Reviews: Computational Molecular Science (in press)

Proteins are complex macromolecules that evolved over billions of years to be active in aqueous solution. Water is a key element that stabilizes their structure, and most structural studies on proteins ... [more ▼]

Proteins are complex macromolecules that evolved over billions of years to be active in aqueous solution. Water is a key element that stabilizes their structure, and most structural studies on proteins have thus been carried out in aqueous environment. However, recent experimental approaches have opened the possibility to gain structural information on proteins from gas-phase measurements. The obtained results revealed significant structural memory in proteins when transferred from water to the gas phase. However, after several years of experimental and theoretical research, the nature of the structural changes induced by vaporization, the exact characteristics of proteins in the gas phase, and the physicochemical forces stabilizing dehydrated proteins are still unclear. We will review here these issues using both experimental and theoretical sources of information. [less ▲]

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See detailÉclairer les enjeux de la reconstruction industrielle du bassin liégeois : l'apport des archives des Etablissements insalubres et dangereux (1919-1925)
Peters, Arnaud ULg; Defechereux, Olivier ULg; Destatte, Julien ULg

in Parmentier, Isabelle (Ed.) Actes des Deuxièmes Rencontres d'Histoire de l'Environnement en Belgique (Belgique, Luxembourg, Congo, Rwanda, Burundi) (in press)

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See detailMoyens et enjeux d’une approche didactique des Illuminations
Saint-Amand, Denis ULg

in Parade Sauvage (in press), 25

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See detailEntre répit et déréliction : Berlin clubbing
Saint-Amand, Denis ULg

in Zimmermann, Margarete (Ed.) Ville des émotions : Berlin dans la littérature francophone contemporaine (in press)

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See detailA two-level emergency control scheme against power system voltage instability
Otomega, Bogdan; Glavic, Mevludin ULg; Van Cutsem, Thierry ULg

in Control Engineering Practice (in press)

A two-level adaptive control scheme against power system voltage instability is proposed, to deal with emergency conditions by acting on distribution transformers and/or by curtailing some loads. The ... [more ▼]

A two-level adaptive control scheme against power system voltage instability is proposed, to deal with emergency conditions by acting on distribution transformers and/or by curtailing some loads. The lower level includes distributed controllers, each acting once the voltage at a monitored transmission bus settles below a threshold value. The upper level benefits from wide-area monitoring and adjusts in real-time the voltage thresholds of the local controllers. Emergency detection is based on the sign of sensitivities. The proposed scheme is robust with respect to communication failures. Its performance is illustrated through detailed simulations of a small but realistic 74-bus test system. [less ▲]

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See detailLe Mur et le masque. À propos de Banksy.
Saint-Amand, Denis ULg

in MethIS : Méthodes et Interdisciplinarité en Sciences Humaines (in press)

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See detailInventer. Le jeune Descartes et les voies de l’inventio en 1619-1620
Dubouclez, Olivier ULg

in Savini, Massimiliano (Ed.) Les écrits de jeunesse de Descartes (in press)

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See detailDialectique de l’inattendu. Voies et impasses de la philosophie dans l’œuvre de Valère Novarina
Dubouclez, Olivier ULg

in Née, Laure (Ed.) Valère Novarina (in press)

Novarina entretient avec la philosophie une relation faite d’attraction et de défiance. Le primat accordé à la parole et le refus de toute ontologie le conduisent à définir un nouveau modèle théorique ... [more ▼]

Novarina entretient avec la philosophie une relation faite d’attraction et de défiance. Le primat accordé à la parole et le refus de toute ontologie le conduisent à définir un nouveau modèle théorique, celui de la « fugue » et, tout en poursuivant le dialogue avec les philosophes, à construire ce que nous appellerons une dialectique de l’inattendu, mouvement par lequel le vide actif qui habite la personne humaine nourrit le renouvellement de la pensée et de l’action. [less ▲]

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See detail« The European Union As A Region-Building Actor In Latin-America »
Parra Santamaria, Lusmiriam Andrea ULg

in North and South: The United States, the European Union, and the Developing World (in press)

The main objective of this document is to establish if the UE can be considered as an actor of the Latin-American regional integration. The method of the current research is qualitative. The different ... [more ▼]

The main objective of this document is to establish if the UE can be considered as an actor of the Latin-American regional integration. The method of the current research is qualitative. The different aspects of the interregional European strategy for regional integration towards Latin America (E.I.S.R.I. – L.A.) are analyzed as follows. First, the discourse that places regional integration as one of the priorities of the given strategy is studied. Second, the economic actions responsible of materializing that priority are checked. Third, the political actions of the E.I.S.R.I. – L.A. are introduced. The results of the analysis make it evident that although EU appears to be an actor of the Latin-American regional integration, its influence seems to be restricted. Nevertheless, this affirmation should be relativized because this lack of influence can be due to an absence of mechanisms of measurement of results in terms of regional integration. [less ▲]

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See detailHommage à Luc Collès
Defays, Jean-Marc ULg; Géron, Geneviève

Book published by Editions Modulaires Européennes (in press)

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See detailPilgrimage Certificates from the Mamluk Period: New Data
Bauden, Frédéric ULg

in Bulletin of the School of Oriental and African Studies (in press)

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See detailMémoire épisodique dans la maladie d’Alzheimer : déclin de la recollection et de la familiarité ?
Simon, Jessica ULg; Bastin, Christine ULg

in Medecine Sciences : M/S (in press)

According to the dual-process recognition models, the retrieval of information from long-term memory is supported by recollection and familiarity. Alzheimer’s disease is consistently found to affect ... [more ▼]

According to the dual-process recognition models, the retrieval of information from long-term memory is supported by recollection and familiarity. Alzheimer’s disease is consistently found to affect recollection. As for familiarity, however, no consensus has been reached so far. Some studies are in favor of an early impairment of familiarity, while others are in favor of a preservation of familiarity in the mild and moderate stages of the disease. This lack of consensus can be partly explained by methodological differences between studies. We discuss three methodological dimensions: the type of recognition test, the type of paradigm for estimating familiarity and recollection, and the nature of the material used. These differences reveal the complex nature of familiarity which would be underlied by different mechanisms that may be selectively altered or preserved in the disease. [less ▲]

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