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See detailAvailable technical flexibility for balancing variable renewable energy sources: case study in Belgium
Quoilin, Sylvain ULg; Verbruggen, Aviel

Conference (2013)

The world is facing a historical increase in energy demand and energy consumption. Renewable energy sources are considered as a solution to both environmental issues and increasing energy demand, but ... [more ▼]

The world is facing a historical increase in energy demand and energy consumption. Renewable energy sources are considered as a solution to both environmental issues and increasing energy demand, but present high variability and low predictability. Variability and uncertainty are familiar aspects of all power systems. However, the increase of the share of renewable sources leads to new needs in terms of flexible resources. These resources can be provided by four different means: 1. Dispachable power plants (i.e with ramp up and ramp down capabilities) 2. Storage systems, mainly in the form of pumping stations. 3. Grid interconnections between countries 4. Demand side management. The present work focuses on the high voltage transmission grid, and assesses the amount of technical flexibility available to balance the fluctuations of Variable Renewable Energy (VRE) sources. The model is based on a dynamic programming unit commitment algorithm (i.e. accounting for each individual power plant on the grid) and focuses more particularly on the flexibility potential of power plants and of energy storage. The selected time resolution is one hour. Residual load curves are established on the basis of actual consumption for the year 2012 and on different scenarios of solar and wind penetration. The method is applied to the case of Belgium, based on actual disaggregated power consumption curves throughout the year, and on the current power generation park. Due to the difficulty to assess the flexible resource available through interconnections, the Belgian grid is considered isolated. It should also be noted that this work does not address the voltage stability issue: it focuses on balancing issues only (i.e. time constants varying between minutes and days). Simulation results show the VRE penetration potential is higher than usually considered. Bottlenecks therefore seems to be related to improper or inefficient market mechanisms, unable to take full profit of the technical flexible resource available. [less ▲]

Detailed reference viewed: 121 (8 ULg)
Peer Reviewed
See detailAvalanches of Popping Bubbles in Collapsing Foams
Vandewalle, Nicolas ULg; Lentz, J. F.; Dorbolo, Stéphane ULg et al

in Physical Review Letters (2001), 86(1), 179-82

We report acoustic measurements of popping bubbles during the collapsing of aqueous foams. The sound pattern is analyzed using classical methods of statistical physics. It is found that membrane rupture ... [more ▼]

We report acoustic measurements of popping bubbles during the collapsing of aqueous foams. The sound pattern is analyzed using classical methods of statistical physics. It is found that membrane rupture concerns a wide variety of situations: small and large membranes at the air/foam interface. Avalanches of popping bubbles are put into evidence. Time durations in between successive pops seem to be distributed on a universal power law. [less ▲]

Detailed reference viewed: 27 (9 ULg)
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See detailAvaliação continua e examenes : noçoes de docimologia
de Landsheere, Gilbert ULg

Book published by Livraria Almedina - 3ème éd. revue et augmentée (1976)

Detailed reference viewed: 160 (0 ULg)
See detailAvaliaçao da linguagem das crianças e adolescentes deficientes mentais
Comblain, Annick ULg

in Lepot-Froment, C. (Ed.) Educaçao especializada : Pesquisas e indiçaoes par a açao (1999)

Detailed reference viewed: 22 (2 ULg)
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See detailAvaliação da Qualidade de Vida Infantil: O Inventário Sistémico de Qualidade de Vida para Crianças
Fonseca, Marta; Missotten, Pierre ULg; Etienne, Anne-Marie ULg et al

in Psicologia, Reflexão e Crítica = Psychology, Reflection and Criticism (2014), 27(2),

Introduction: Children’s quality of life evaluation has specific methodological aspects. Objective: To examine the psychometric properties of the Portuguese version of the Child Quality of Life Systemic ... [more ▼]

Introduction: Children’s quality of life evaluation has specific methodological aspects. Objective: To examine the psychometric properties of the Portuguese version of the Child Quality of Life Systemic Inventory (CQLSI), which is based on an innovative conceptual and methodological approach to quality of life self-assessment, namely by being interactive and playful, having a psychometry which operates several scores and allowing an analysis of each domain of life. Methods: 120 Portuguese children, from 8 to 12 years old. Results: Internal consistency of the four scores of the CQLSI (State, Goal, Rank and Gap) is satisfactory; all scores have their own specificity. Data show convergent validity. On the other hand, no satisfactory factorial structure was found. Conclusion: Feasibility and psychometric adequacy of the CQLSI Portuguese version seems demonstrated. [less ▲]

Detailed reference viewed: 138 (4 ULg)
See detailAvaliação da taxa de degradação da motilidade do sêmen de ovinos deslanados e caprinos, diluidos em água de coco e suas frações.
Teixeira, M. D. A.; Rodrigues, A. P. R.; Melo de Sousa, Noelita ULg et al

in Anais do XXIII Congresso Brasileiro de Medicina Veterinária (1994)

Detailed reference viewed: 26 (1 ULg)
See detailAvaliação Nutricional da Rotulagem Nutricional Obrigatória Utilizada em Salsichas Normais e Light
Didimo Imazaki, Pedro Henrique ULg; Mano, Sérgio; Mônica, Freitas et al

Poster (2004)

Detailed reference viewed: 25 (0 ULg)
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Peer Reviewed
See detailAvancées concernant l’Aliskiren (Rasilez®), inhibiteur direct de la rénine, et l’Aliskiren-hydrochlorothiazide (Rasilez HCT ®)
Boxho, G.; Krzesinski, Jean-Marie ULg; Scheen, André ULg

in Revue Médicale de Liège (2009), 64(11), 560-565

Aliskiren (Rasilez®), a direct renin inhibitor, is currently indicated for the treatment of essential hypertension, as monotherapy or in combination, especially with hydrochlorothiazide (Rasilez HCT®). It ... [more ▼]

Aliskiren (Rasilez®), a direct renin inhibitor, is currently indicated for the treatment of essential hypertension, as monotherapy or in combination, especially with hydrochlorothiazide (Rasilez HCT®). It may also be use to obtain a more complete blockade of the renin-angiotensin-aldosterone system (RAAS) when it is associated with an angiotensin converting enzyme inhibitor (ACEI) (or an AT1 angiotensin receptor antagonist) (ARA). There is some room for agents that may be more efficacious in reducing the progression of diabetic nephropathy than ACEI or ARA. In this context, the dual blockade of RAAS most probably offers a better efficacy than the simple blockade, but also exposes to a higher risk. Should ongoing trials confirm the preliminary favourable results, aliskiren might reach a forefront position among the armamentarium now available to optimize the RAAS blockade. The present article will summarize advances concerning the biochemical effects of the specific mode of action of aliskiren, especially the potential interferences related to increased renin/pro-renin levels, as well as results of recent clinical trials, not only in hypertension, but also in the fields of diabetes, renal insufficiency and cardiology. The objectives and design of the landmark study ALTITUDE will also be briefly presented. [less ▲]

Detailed reference viewed: 167 (3 ULg)
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See detailLes avancées du traité de Lisbonne en matière de coopération judiciaire
Sibony, Anne-Lise ULg

Scientific conference (2008, February 29)

Detailed reference viewed: 16 (1 ULg)
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See detailLes avancées du traité de Lisbonne en matière de coopération judiciaire
Sibony, Anne-Lise ULg

in Revue de la Faculté de Droit de l'Université de Liège (2008), (2), 249-263

This article gives a brief overview of the development of European law in the area of civil cooperation in civil matters. It highlight the potential for innovation contained in the Lisbon treaty for the ... [more ▼]

This article gives a brief overview of the development of European law in the area of civil cooperation in civil matters. It highlight the potential for innovation contained in the Lisbon treaty for the construction of a European judicial area. [less ▲]

Detailed reference viewed: 155 (16 ULg)
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See detailAvancées récentes dans l'investigation olfactive de la mort
Stefanuto, Pierre-Hugues ULg; Focant, Jean-François ULg

Scientific conference (2014, May 07)

Detailed reference viewed: 22 (1 ULg)
Peer Reviewed
See detailAvancées récentes en biologie moléculaire du virus de la diarrhée virale bovine
Dehan, Pierre ULg; Hamers, C.; Couvreur, B. et al

in Annales de Médecine Vétérinaire (2001), 145

Detailed reference viewed: 17 (5 ULg)
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See detailAvancees therapeutiques en pathologie infectieuse au cours de la derniere decennie
GIOT, Jean-Baptiste ULg; Mukeba Tshialala, D.; Mayasi Ngongo, N. et al

in Revue Médicale de Liège (2007), 62(5-6, May-Jun), 377-83

This review focuses on new antibiotics, particularly for gram-positive infections, new antiretroviral drugs, new treatment of fungal infections and indications of miltefosine in the treatment of ... [more ▼]

This review focuses on new antibiotics, particularly for gram-positive infections, new antiretroviral drugs, new treatment of fungal infections and indications of miltefosine in the treatment of leishmaniasis. [less ▲]

Detailed reference viewed: 56 (3 ULg)
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Peer Reviewed
See detailLes avances d'associé et la libération du capital: deux notions équivalentes?
Caprasse, Olivier ULg; Aydogdu, Roman ULg

in Revue Pratique des Sociétés Civiles et Commerciales (2004)

Detailed reference viewed: 71 (15 ULg)