Publications ORBi OA
Bookmark and Share    
Full Text
Peer Reviewed
See detailEnergy and transmission allocation in overlapping electricity markets : incorporating N-1 security and accounting for losses
Marinakis, Adamantios ULiege; Van Cutsem, Thierry ULiege

in Proceedings of the 7th international conference on the European Electricity Market (2010, June)

The possibility for market participants to place their bids in markets where they are not geographically located is investigated in this paper. An iterative procedure enabling the simultaneous clearing of ... [more ▼]

The possibility for market participants to place their bids in markets where they are not geographically located is investigated in this paper. An iterative procedure enabling the simultaneous clearing of those overlapping markets by transaction schedulers while managing the resulting pre and post-contingency congestion is proposed. Transmission losses are calculated during the iterations and are accounted for by allocating them to the various transaction schedulers. The procedure is illustrated and commented on a test system. [less ▲]

Detailed reference viewed: 64 (0 ULiège)
Full Text
See detailAnalysis of climate change, high-flows and low-flows scenarios on the Meuse basin: WP1 report - Action 3
Drogue, G.; Fournier, M.; Bauwens, Alexandra ULiege et al

Report (2010)

Detailed reference viewed: 150 (55 ULiège)
Full Text
Peer Reviewed
See detailFormer des enseignants a une approche par compétences juste et efficace
Beckers, Jacqueline ULiege; Campo, Anne ULiege

Conference (2010, June)

Detailed reference viewed: 37 (5 ULiège)
Full Text
See detailModélisation multi physique du comportement au feu des colonnes en béton arme
Benmehidi, Nadia; Franssen, Jean-Marc ULiege; Guenfoud, Mohamed

Scientific conference (2010, June)

Detailed reference viewed: 105 (6 ULiège)
Full Text
Peer Reviewed
See detailLes prions exploitent les communications neuro-immunitaires
Dorban, Gauthier; Antoine, Nadine ULiege; Defaweux, Valérie ULiege

in Medecine Sciences : M/S (2010), 26(6),

Detailed reference viewed: 24 (11 ULiège)
Full Text
See detailVacances sans parents; à 16 ans et plus.
Stassart, Martine ULiege

Article for general public (2010)

Pour le gtand adolescent, les vacances d'été sonl le moment idéal pour éprouver sa relation de dépendance/indépendance par rapport aux parents.

Detailed reference viewed: 99 (14 ULiège)
Full Text
Peer Reviewed
See detailLiver transplantation from donation after cardiac death donors: initial Belgian experience 2003-2007.
Detry, Olivier ULiege; Donckier, Vincent; Lucidi, Valerio et al

in Transplant International (2010), 23(6), 611-618

The Belgian experience with donation after cardiac death (DCD) liver transplantation (LT) was retrospectively reviewed, particularly evaluating patient and graft survivals, and biliary complications. From ... [more ▼]

The Belgian experience with donation after cardiac death (DCD) liver transplantation (LT) was retrospectively reviewed, particularly evaluating patient and graft survivals, and biliary complications. From 2003 to 2007, 58 DCD-LT were performed in Belgium. Mean procurement total warm ischemia time was 25 +/- 2 min (mean +/- SEM). Mean cold ischemia time was 451 +/- 18 min. Mean follow-up was 23 +/- 2.2 months. Post-transplant peak aspartate aminotransminases was 2241 +/- 338 UI/l. Patient survivals at 1 month, 1 and 3 years, were 91.3%, 83.3% and 66.9% respectively. Graft survivals at 1 month, 1 and 3 years, were 84.4%, 72.4% and 48.8% respectively. Two patients (3.4%) developed primary nonfunction. Regarding the biliary complications, seven grafts (12%) were lost because of intrahepatic cholangiopathy, and 12 other patients (20.6%) developed bile duct stenoses requiring endoscopic and/or surgical management. The rate of symptomatic ischemic biliary lesions for grafts surviving more than 3 months was 38% (19/50). Although DCD organ donors may be a source of viable liver grafts, results were inferior to those obtained with donation after brain death LT in this series. Prognostic criteria have to be developed to improve results of DCD-LT. [less ▲]

Detailed reference viewed: 64 (18 ULiège)
Full Text
Peer Reviewed
See detailAn experimental study of the use of acoustic diffusers to reduce noise in urban areas
Picaut, Judicaël; Hossam Eldien, Hany; Billon, Alexis ULiege

Conference (2010, June)

The use of acoustic diffusers to reduce noise in urban areas has been recently numerically investigated [Acta Acustica united with Acustica, Vol. 95 (2009), p. 653–668]. It was shown that a significant ... [more ▼]

The use of acoustic diffusers to reduce noise in urban areas has been recently numerically investigated [Acta Acustica united with Acustica, Vol. 95 (2009), p. 653–668]. It was shown that a significant noise reduction can be observed by considering diffusers on the building façades. In the present study, an experimental investigation is proposed to validate last results. Measurements are carried out using a 1:10 urban street scale model, with and without acoustics diffusers, in order to evaluate the “real” effect of such devices, for several configurations. Results, in terms of sound attenuation and reverberation, show that a positive effect can be observed, provided that diffusers are well designed for the reduction of road traffic noise. [less ▲]

Detailed reference viewed: 138 (2 ULiège)
Full Text
See detailImpact of storage and handling on metabolites in a human plasma standard reference material
Eppe, Gauthier ULiege; Dodder, Nathan; Lippa, Katrice et al

Conference (2010, June)

Detailed reference viewed: 25 (5 ULiège)
Full Text
See detailRepresenting real numbers in a generalized numeration system
Charlier, Emilie ULiege

Conference (2010, June)

We show how to represent an interval of real numbers in an abstract numeration system built on a language that is not necessarily regular. As an application, we consider representations of real numbers ... [more ▼]

We show how to represent an interval of real numbers in an abstract numeration system built on a language that is not necessarily regular. As an application, we consider representations of real numbers using the Dyck language. We also show that our framework can be applied to the rational base numeration systems. [less ▲]

Detailed reference viewed: 11 (3 ULiège)
Full Text
See detailPotential estimation of titratable acidity in cow milk using mid-infrared spectrometry
Colinet, Frédéric ULiege; Soyeurt, Hélène ULiege; Anceau, Christine ULiege et al

Conference (2010, June)

Milk coagulation has a direct effect on cheese yield. Several factors influence the milk coagulation kinetics. In addition to calcium and milk protein concentrations, titratable acidity influences all the ... [more ▼]

Milk coagulation has a direct effect on cheese yield. Several factors influence the milk coagulation kinetics. In addition to calcium and milk protein concentrations, titratable acidity influences all the phases of milk coagulation. The objective of this research was to study the feasibility of prediction of titratable acidity directly in bovine milk using mid-infrared spectrometry. In order to maximize the variability in the measurements of titratable acidity, milk samples were collected on basis of several criteria (e.g. breeds). The titratable acidity was recorded as Dornic degree. All samples were also analyzed by MIR spectrometry. Using partial least squares regressions and first derivative pretreatment of spectral data, a calibration equation was built to predict the Dornic degree in cow milk. First results were promising and showed the potentiality to this calibration. The calibration and cross-validation coefficients of determination were 92.25 and 89.88 %, respectively. Moreover, the ratio of standard error of prediction to standard deviation was 3.13 and permits us to consider the calibration equation as usable in most application such as scientific researches and the screening of the Walloon dairy herd particularly in order to improve the milk coagulation properties. [less ▲]

Detailed reference viewed: 182 (20 ULiège)
Full Text
See detailModélisation, simulation et contrôle d’un cycle de Rankine organique en régime dynamique.
Oudkerk, Jean-François ULiege

Master's dissertation (2010)

Organic Rankine cycles (ORC) are thermodynamic cycles that allow the production of mechanical energy form low temperature heat source. Additionally, they are particularly suitable to small scale units ... [more ▼]

Organic Rankine cycles (ORC) are thermodynamic cycles that allow the production of mechanical energy form low temperature heat source. Additionally, they are particularly suitable to small scale units. This work introduces the use of ORC to recover a variable flow rate and temperature heat source. As heat source’s characteristics are variables, it is judicious to be able to simulate the dynamic behavior of the system. The suggested model focuses mainly on dynamic behaviour of heat exchangers. A first model in steady state is primarily proposed and validated. The dynamic model is then described and also validated. Two controls strategies are suggested and compared. Dynamic simulation’s results show that control strategies proposed are well adapted to the system. An overall efficiency of 7.94 % is obtained for considered heat source. [less ▲]

Detailed reference viewed: 29 (1 ULiège)
Full Text
Peer Reviewed
See detailNovel applications of lactoperoxydase system against pathogens of cultivated plants
Jijakli, Haissam ULiege; Bafort, Françoise ULiege; perraudin, J.P

Conference (2010, June)

Detailed reference viewed: 32 (10 ULiège)
Full Text
Peer Reviewed
See detailInvestigations of the GCxGC-HRMS coupling
Focant, Jean-François ULiege; Patterson Jr

Conference (2010, June)

Detailed reference viewed: 27 (0 ULiège)
Full Text
Peer Reviewed
See detailOutils de diagnostic et stratégies de remédiation au service d’une maîtrise plus équitable des langues étrangères
Beckers, Jacqueline ULiege; Campo, Anne ULiege; Simons, Germain ULiege

in Beckers, Jacqueline; Crinon, Jacques; Simons, Germain (Eds.) Approche par compétences et réduction des inégalités d'apprentissage entre élèves (2010, June)

Cette communication présente le fruit d’une recherche en langues modernes menée en collaboration avec neuf enseignants du secondaire dans des écoles proposant des formations qualifiantes et accueillant un ... [more ▼]

Cette communication présente le fruit d’une recherche en langues modernes menée en collaboration avec neuf enseignants du secondaire dans des écoles proposant des formations qualifiantes et accueillant un public plutôt défavorisé par son milieu socio-économique ou au parcours scolaire davantage marqué par l’échec. Cette recherche a permis la création d’outils qui ont été expérimentés dans les classes partenaires et réajustés grâce aux retours des enseignants mais aussi des élèves de façon à diagnostiquer les difficultés récurrentes chez les apprenants (maîtrise des compétences et des savoirs linguistiques) et de tenter d’y apporter des solutions. Toutefois, il ne suffit pas d’identifier les lacunes d’un élève et lui proposer des pistes de remédiation pour améliorer la maîtrise de sa langue. Il faut le rendre conscient de ses forces et faiblesses et l’engager dans des démarches qui lui permettront de progresser, notamment par un apprentissage stratégique. Nous avons veillé à expliciter les stratégies de réception et de production qu’un élève peut utiliser lorsqu’il apprend une langue étrangère et qui restent sans doute encore trop souvent de l’ordre de l’implicite. Permettre aux élèves de prendre conscience de leurs difficultés et de s’autoréguler dans leur apprentissage est un enjeu d’équité essentiel car tous ne sont pas aidés, accompagnés dans leur réflexion par leur milieu familial. [less ▲]

Detailed reference viewed: 63 (5 ULiège)
Full Text
Peer Reviewed
See detailGéométrie des matrices positives semi-définies de rang fixé : un peu de théorie et beaucoup d’applications
Sepulchre, Rodolphe ULiege; Absil, Pierre-Antoine; Bonnabel, Silvère

in Proceedings of Sixième Conférence Internationale Francophone d'Automatique (CIFA 2010) (2010, June)

Cet article est une introduction au calcul et `a l’optimisation sur les matrices sym´etriques positives semid ´efinies de rang (faible) fix´e. L’approche propos´ee est bas´ee sur deux g´eom´etries ... [more ▼]

Cet article est une introduction au calcul et `a l’optimisation sur les matrices sym´etriques positives semid ´efinies de rang (faible) fix´e. L’approche propos´ee est bas´ee sur deux g´eom´etries riemanniennes quotient, qui permettent de calculer efficacement tout en pr´eservant le rang et le caract` ere positif des matrices consid´er´ees. Le champ d’applications est vaste, et l’article survole quelques d´eveloppements r´ecents qui illustrent l’int´erˆet de l’approche consid´er´ee dans les probl`emes de tr`es grande taille rencontr´es en contrˆole, statistiques, et apprentissage. [less ▲]

Detailed reference viewed: 89 (7 ULiège)
Full Text
Peer Reviewed
See detailInnovative Concepts in Navigation Lock Design
Rigo, Philippe ULiege; Daniel, Ryszard

in The Port Infrastructure Seminar , 2010, TUDelft, NL (2010, June)

This paper presents the new report n°106 of PIANC InCom WG29 on Innovations in Navigation Lock Design, published by PIANC in August 2009, as well as some additional contributions on lock gates (gate ... [more ▼]

This paper presents the new report n°106 of PIANC InCom WG29 on Innovations in Navigation Lock Design, published by PIANC in August 2009, as well as some additional contributions on lock gates (gate contact technology). The paper highlights the main objectives and issues of his PIANC report with a specific emphasis on gates and specifically on the contact aspects. Locks are key structures for the development of the navigation in canals and in natural rivers where weirs regulate water levels to enable navigation. They may also be strategic infrastructure for port development. The core of this report has three major parts. The first part presents an exhaustive list of design goals associated with locks. This section is particularly important for decision makers who have to launch a new project. The second part reviews the design principles that must be considered by designers. This section is methodologically oriented. The third part is technically oriented. All main technical aspects (hydraulics, structures, foundations, including computational aspects, etc.) are reviewed, focussing on changes and innovations occurring since 1986. Perspectives and trends for the future are also listed. When appropriate, recommendations are listed. It is impossible to give the details of all lock innovation areas in this paper. As an example, the lock gates and, in particular, the modern views on their contact issues have been chosen. These new solutions are welcome to limit the maintenance and to extend the service life of lock gates. [less ▲]

Detailed reference viewed: 127 (5 ULiège)
Full Text
Peer Reviewed
See detailLes enjeux financiers et budgétaires
Husson, Jean-François ULiege

Conference (2010, May 31)

This presentation offers an overview of the public financing of religious and philosophical communities in Brussels-Capital Region, by both regional and local authorities. Amounts and challenges are ... [more ▼]

This presentation offers an overview of the public financing of religious and philosophical communities in Brussels-Capital Region, by both regional and local authorities. Amounts and challenges are presented. [less ▲]

Detailed reference viewed: 81 (8 ULiège)
Full Text
Peer Reviewed
See detailÉtude des facteurs associés dans la survenue des accidents du travail dans une industrie textile en République démocratique du Congo
Panda Lukongo, Kitronza ULiege

in Archives des Maladies Professionnelles et de l'Environnement (2010), 71(2), 171-179

Objective This work aims at determining, in the context of the Democratic Republic of Congo (DRC), the impact of the individual, socioprofessional and organizational characteristics in occupational ... [more ▼]

Objective This work aims at determining, in the context of the Democratic Republic of Congo (DRC), the impact of the individual, socioprofessional and organizational characteristics in occupational accidents that occurred within a textile factory. Patients and methods We made a crosssectional study of two populations within the factory located in the NE of the DRC: Workmen (n = 114) and executives (n = 96). The data of our total sample (n = 210) were collected on the basis of a questionnaire administered to the workers and concerning procedures, exposures and health effects. Odds ratios (OR) and their confidence intervals at 95% were estimated. A model of logistic regression was constructed in order to assess the adjusted Ors between industrial accidents and individual and socio-organizational characteristics. Result The study highlighted a large number of occupational accident (60,5%) in the sample studied during 2007. The studied variables are: age (OR 2.3 (2.84–10.71)] for age less than or equal to 38 years; seniority (OR 1.95 [1.27–1.97]). Association between the occurrence of accidents alcohol consumption (55%) as well as cigarette smoking (28%) was also highlighted, ORs are respectively 2.7 (1.57–4.99) and 2.9 (1.47–7.38). The socio-organizational characteristics present ORs of respectively 2.3 (1.76–6.02) for work status, 1.9 (1.64–9.40) for work conditions and 1.7 (1.20–3.61) for job satisfaction. Conclusion The frequencies and OR observed in our study demonstrates a significant association between individual and organizational factors and the occurrence of occupational accidents within the textile company. These results, the first in this field, in DRC must however be confronted with those of other studies concerning health at work in other fields. Thus, we recommend a total assumption of responsibility through concerted action between the various partners and measures to be taken, jointly in the regulatory technical and medical fields. [less ▲]

Detailed reference viewed: 75 (2 ULiège)