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See detailPower line dynamic rating: forecasting potential period of low wind speed is crucial
Nguyen, Huu-Minh ULg; Doutreloup, Sébastien; Erpicum, Michel ULg et al

Conference (2012, September)

The replacement and building of new electrical power lines (50 000 km in Europe) can’t cope with the growth of RES development in EU for the ten upcoming years. New solutions have to be found to manage ... [more ▼]

The replacement and building of new electrical power lines (50 000 km in Europe) can’t cope with the growth of RES development in EU for the ten upcoming years. New solutions have to be found to manage such power transmission needs. Dynamic Line Rating (DLR) systems are part of the global solution. They allow to increase the power line capacity by an average 20% over the static rating (which is defined as the maximum current-carrying capacity as designed). The ampacity or thermal rating, is calculated thanks to (i) sensors installed directly on the power line conductors, like Ampacimon, (ii) weather data, and (iii) standard thermal models (IEEE, CIGRE). However, in order to be fully effective and to allow an efficient use of assets, ampacity calculation in real-time is not enough; it has to be forecasted as well. Beyond 6h-forecast, weather forecasts are necessary to compute the line ampacity up to two days ahead, as needed by network operation. As wind convection has a major impact on conductor cooling, even low wind speeds (2m/s up to 5m/s) allow a huge ampacity increase (the actual rating can be doubled). Therefore, low wind speed forecast up to 2-days ahead finds a major application in dynamic rating of overhead transmission and distribution lines. [less ▲]

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See detailCaractérisation de la dynamique d'occupation du sol de la ville de Kisangani (R.D. Congo) et sa périphérie entre 2002 et 2010
Maréchal, Justine ULg

Master's dissertation (2012)

L’évolution démographique des pays du sud sans cesse croissante et les nombreux changements qu’elle provoque sont à la source d’un grand nombre de questions d’étude. Ce sont en particulier les changements ... [more ▼]

L’évolution démographique des pays du sud sans cesse croissante et les nombreux changements qu’elle provoque sont à la source d’un grand nombre de questions d’étude. Ce sont en particulier les changements d’occupation du sol résultant de l’extension d’une ville du sud qui nous ont intéressés dans ce travail de fin d’études, dont l’objectif était de quantifier l’urbanisation et la déforestation à Kisangani (R. D. Congo) entre 2002 et 2010. Des cartes d’occupation du sol ont été réalisées sur la base de deux images SPOT 5 et grâce à une sortie terrain en mars-avril 2012. Les classifications ont été effectuées sur base de l’approche orientée-objet et les méthodes non supervisée et supervisée ont été comparées. Les résultats montrent une meilleure précision des classifications supervisées (K = 0,42 et K = 0,71) par rapport aux classifications non supervisées (K = 0,32 et K = 0,53). Un taux d’extension urbaine de 16 % et une déforestation de 7 % ont pu être mis en évidence suite aux classifications supervisées. Le calcul d’indices de structure spatiale du paysage a permis de segmenter le gradient urbain-périurbain-rural-forêt associé à Kisangani que ce soit en classification non supervisée ou supervisée. Les milieux périurbain et rural sont ainsi caractérisés par une hétérogénéité forte, contrairement aux milieux forestier et urbain qui sont caractérisés par une homogénéité du milieu. La supériorité de la méthode supervisée sur la méthode non supervisée a été démontrée dans la caractérisation de plusieurs aspects de l’étude. [less ▲]

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See detailGenetics and genomics of energy balance measured in milk using mid-infrared spectroscopy
McParland, Sinead; Calus, Mario; Coffey, Mike et al

in Book of Abstracts of the 63rd Annual Meeting of the European Federation of Animal Science (2012, August)

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See detailGenetics and genomics of energy balance measured in milk using mid-infrared spectroscopy
McParland, Sinead; Calus, Mario; Coffey, Mike et al

Poster (2012, August)

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See detailIntroduction
Florence, Eric ULg; Madariaga College of Europe Foundation, Defraigne

in Florence, Eric; Defraigne, Pierre (Eds.) Towards a New Development Paradigm in Twenty-First Century China. Economy, Society and Politics (2012)

This book argues that the current state of China requires an important paradigm shift in the way the party-state manages the country’s development, and goes on to assess the fitness of the party-state for ... [more ▼]

This book argues that the current state of China requires an important paradigm shift in the way the party-state manages the country’s development, and goes on to assess the fitness of the party-state for implementing such a paradigm shift and the likelihood of the party-state bringing this about. It brings together an examination of the very latest situation in a range of key areas where current developments have the potential to undermine substantially the status quo, areas such as the recent economic crisis and the resulting economic slowdown, increasing labour unrest, mounting calls for social justice, worsening urban-rural disparity, the urgent need to implement social welfare programmes, the rise of civil society, and the impact of new media. Overall, the book provides a thorough appraisal of the difficulties which China currently faces. [less ▲]

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See detailanswer to a question from the general reporter in session B2, question 1.6
Lilien, Jean-Louis ULg

Conference (2012, August)

Technology to forecast up to 2 days ahead the ampacity of power lines is now mature owing to european project TWENTIES

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See detailLARGE PENETRATION OF DISTRIBUTED PRODUCTIONS: DYNAMIC LINE RATING AND FLEXIBLE GENERATION, A MUST REGARDING INVESTMENT STRATEGY AND NETWORK RELIABILITY
Schell, Peter; Lilien, Jean-Louis ULg; Nguyen, Huu-Minh ULg et al

Conference (2012, May)

Dynamic Line Rating (DLR), a.k.a determining the maximum rating of overhead lines based on real-time weather parameters has the potential to significantly increase the power transport & distribution ... [more ▼]

Dynamic Line Rating (DLR), a.k.a determining the maximum rating of overhead lines based on real-time weather parameters has the potential to significantly increase the power transport & distribution capacity of the grid in favorable weather conditions. Combining active network management (curtailable generation) with DLR as trigger offers a solution out-there for the <br />system operator that combines technical feasibility, adequate implementation timing and economic viability. Flexible generation being already in use on the ELIA network, the potential benefits of using it in conjunction with DLR will be analyzed. [less ▲]

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See detailEuropean project, demo “NETFLEX” For large integration of renewables using DLR, PST and PMU.
Lilien, Jean-Louis ULg

Conference (2012, February)

forecasting ampacity as a need for power system operation

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See detailLes entreprises sociales d'insertion : des parties prenantes multiples pour des objectifs multiples ?
Campi, Sara; Grégoire, Olivier; Defourny, Jacques ULg et al

in Gardin, Laurent; Laville, Jean-Louis; Nyssens, Marthe (Eds.) L’insertion par l’économique au prisme de l'entreprise sociale : un bilan international (2012)

Suivant les analyses théoriques proposées au sein du réseau EMES (Borzaga et Defourny 2001), la multiplicité des parties prenantes et la multiplicité des objectifs sont considérées comme des aspects ... [more ▼]

Suivant les analyses théoriques proposées au sein du réseau EMES (Borzaga et Defourny 2001), la multiplicité des parties prenantes et la multiplicité des objectifs sont considérées comme des aspects importants des entreprises sociales. Cependant, bien que ces caractéristiques aient été soulignées par divers auteurs sur le plan théorique, leur validation empirique reste relativement limitée. Le présent chapitre entend combler ce vide en menant une analyse approfondie de la multiplicité des parties prenantes et des objectifs au sein des entreprises sociales d'insertion en Europe. Nous nous penchons dans la première section sur la multiplicité des objectifs, en fournissant quelques éléments théoriques utiles pour interpréter ses origines et son apport analytique. Les théories sont ensuite confrontées aux données collectées dans le cadre de la recherche PERSE La deuxième section propose un bref aperçu de la littérature économique et organisationnelle relative à la gouvernance et à l’implication des parties prenantes, avant d’analyser dans quelle mesure les ESI européennes impliquent une multiplicité de parties prenantes. La troisième section examine les raisons permettant d'expliquer l'implication de diverses catégories de parties prenantes dans la structure de propriété et dans le processus de prise de décision de ces organisations. [less ▲]

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See detailGenetic correlations of days open with production traits and contents in milk of major fatty acids predicted by mid-infrared spectrometry.
Bastin, Catherine ULg; Berry, D. P.; Soyeurt, Hélène ULg et al

in Journal of Dairy Science (2012), 95(10), 6113-21

The objective of this study was to estimate the genetic relationships between days open (DO) and both milk production traits and fatty acid (FA) content in milk predicted by mid-infrared spectrometry. The ... [more ▼]

The objective of this study was to estimate the genetic relationships between days open (DO) and both milk production traits and fatty acid (FA) content in milk predicted by mid-infrared spectrometry. The edited data set included 143,332 FA and production test-day records and 29,792 DO records from 29,792 cows in 1,170 herds. (Co)variances were estimated using a series of 2-trait models that included a random regression for milk production and FA traits. In contrast to the genetic correlations with fat content, those between DO and FA content in milk changed considerably over the lactation. The genetic correlations with DO for unsaturated FA, monounsaturated FA, long-chain FA, C18:0, and C18:1 cis-9 were positive in early lactation but negative after 100 d in milk. For the other FA, genetic correlations with DO were negative across the whole lactation. At 5 d in milk, the genetic correlation between DO and C18:1 cis-9 was 0.39, whereas the genetic correlations between DO and C6:0 to C16:0 FA ranged from -0.37 to -0.23. These results substantiated the known relationship between fertility and energy balance status, explained by the release of long-chain FA in early lactation, from the mobilization of body fat reserves, and the consequent inhibition of de novo FA synthesis in the mammary gland. At 200 d in milk, the genetic correlations between DO and FA content ranged from -0.38 for C18:1 cis-9 to -0.03 for C6:0. This research indicates an opportunity to use FA content in milk as an indicator trait to supplement the prediction of genetic merit for fertility. [less ▲]

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See detailY a-t-il encore une place pour la double inhibition du système rénine-angiotensine en 2012?
Krzesinski, Jean-Marie ULg; Scheen, André ULg

in Revue Médicale Suisse (2012), 8(351), 1598-1603

The blockade of the renin-angiotensin system (RAS) improves the prognosis of patients with complications related to diabetes, hypertension or, in general, atherosclerosis. Several observational studies ... [more ▼]

The blockade of the renin-angiotensin system (RAS) improves the prognosis of patients with complications related to diabetes, hypertension or, in general, atherosclerosis. Several observational studies have suggested the use of a dual blockade of the RAS to benefit from a better cardiorenal protection. However, recent randomized controlled studies failed to demonstrate that a dual blockade exert a better protection than single blockade, but showed a higher risk for renal complications and hyperkalemia. To decrease the residual risk, other opportunities may be recommended such as reinforcement of low salt diet, use of supraphysiological dose of a monotherapy inhibiting the RAS (perhaps prescribed at the evening) or addition of an aldosterone antagonist. However, all these approaches, as dual therapy, may also increase the risk of hypotension and renal insufficiency and thus require to be used under strict medical supervision. [less ▲]

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See detailObservation of incretin effects during enteral feed transitions of critically ill patients
Jamaludin, U. K.; Docherty, P. D.; Geoffrey Chase, J. et al

in e-SPEN Journal (2012), 7(4), 154-159

Background & aims: Critically ill patients are regularly feed via constant enteral (EN) nutrition infusions. However, the incretin effect or its impact on endogenous insulin concentration remains unclear ... [more ▼]

Background & aims: Critically ill patients are regularly feed via constant enteral (EN) nutrition infusions. However, the incretin effect or its impact on endogenous insulin concentration remains unclear. This study determines whether there is an EN-driven incretin effect in critically ill patients requiring glycaemic control. Methods: Clinically validated, model-based time-variant insulin sensitivity (S I) profiles were identified for 52 non-diabetic patients on Specialized Relative Insulin Nutrition Titration (SPRINT) glycaemic control during transitions off EN (ON/OFF), and back on to EN (OFF/ON). Incretin effects were observable via increased modelled S I after the OFF/ON transition or a decreased S I after the ON/OFF transition. Results: Patients exhibited a median -36% (IQR -82% to 24% p = 0.001) reduction after the ON/OFF feed transition, and a median of +32% (IQR -5% to 53%, p = 0.05) rise in measured S I after the OFF/ON transition. However, 32% of patients exhibited increased S I at the OFF/ON transition, and 37% exhibited reduced S I at the ON/OFF transition. The results are likely due to changes in patient condition over the 5-8 h considered outweighing this effect. Blood glucose was the same during both transitions with median shifts of -2% and -3% after the ON/OFF, and OFF/ON transitions (p > 0.5), respectively. Conclusions: Results imply a significant incretin effect is observed at a cohort level. The impact was stronger for the OFF/ON transition indicating that this effect may be blunted by long-term continuous EN infusions. These results provide the data to design conclusive studies, and to inform glycaemic control protocol development and implementation. © 2012 European Society for Clinical Nutrition and Metabolism. [less ▲]

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See detailControversy about the relative efficacy of dipeptidyl peptidase IV inhibitors.
SCHEEN, André ULg

in Diabetologia (2012), 55

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See detailGliptin versus a sulphonylurea as add-on to metformin.
SCHEEN, André ULg; Paquot, Nicolas ULg

in Lancet (2012), 380

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See detailRelationship between body condition score and health traits in first-lactation Canadian Holsteins.
Loker, S.; Miglior, F.; Koeck, A. et al

in Journal of Dairy Science (2012)

The objective of this research was to estimate daily genetic correlations between longitudinal body condition score (BCS) and health traits by using a random regression animal model in first-lactation ... [more ▼]

The objective of this research was to estimate daily genetic correlations between longitudinal body condition score (BCS) and health traits by using a random regression animal model in first-lactation Holsteins. The use of indicator traits may increase the rate of genetic progress for functional traits relative to direct selection for functional traits. Indicator traits of interest are those that are easier to record, can be measured early in life, and are strongly genetically correlated with the functional trait of interest. Several BCS records were available per cow, and only 1 record per health trait (1 = affected; 0 = not affected) was permitted per cow over the lactation. Two bivariate analyses were performed, the first between BCS and mastitis and the second between BCS and metabolic disease (displaced abomasum, milk fever, and ketosis). For the first analysis, 217 complete herds were analyzed, which included 28,394 BCS records for 10,715 cows and 6,816 mastitis records for 6,816 cows. For the second analysis, 350 complete herds were analyzed, which included 42,167 BCS records for 16,534 cows and 13,455 metabolic disease records for 13,455 cows. Estimation of variance components by a Bayesian approach via Gibbs sampling was performed using 400,000 samples after a burn-in of 150,000 samples. The average daily heritability (posterior standard deviation) of BCS was 0.260 (0.026) and the heritabilities of mastitis and metabolic disease were 0.020 (0.007) and 0.041 (0.012), respectively. Heritability estimates were similar to literature values. The average daily genetic correlation between BCS and mastitis was -0.730 (0.110). Cows with a low BCS during the lactation are more susceptible to mastitis, and mastitic cows are likely to have low BCS. Daily estimates of genetic correlations between BCS and mastitis were moderate to strong throughout the lactation, becoming stronger as the lactation progressed. The average daily genetic correlation between BCS and metabolic disease was -0.438 (0.125), and was consistent throughout the lactation. A lower BCS during the lactation is genetically associated with the occurrence of mastitis and metabolic disease. [less ▲]

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See detailA non-canonical caleosin from Arabidopsis efficiently epoxidizes physiological unsaturated fatty acids with complete stereoselectivity
Bléé, Elizabeth; Flenet, Martine; Boachon, Benoit et al

in FEBS Journal (2012), 279

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See detailEntrepreneuriat social : définitions, ressorts et défis
Huybrechts, Benjamin ULg; Nicholls, Alex; Mouchamps, Hugues ULg

in Bayle, Emmanuel; Dupuis, Jean-Claude (Eds.) Management des entreprises de l'économie sociale et solidaire (2012)

L'entrepreneuriat social est un concept en vogue depuis une dizaine d’années. Souvent illustré par des « success stories » provenant des quatre coins du monde dans divers secteurs (santé, éducation ... [more ▼]

L'entrepreneuriat social est un concept en vogue depuis une dizaine d’années. Souvent illustré par des « success stories » provenant des quatre coins du monde dans divers secteurs (santé, éducation, finance, culture, etc.), le concept s'impose progressivement dans le monde de l'entreprise, ainsi que dans les sphères académiques et politiques (Boschee 2006; Light 2008; Nicholls 2006b; Nyssens 2006). En plus de transformer les marchés existants, l'entrepreneuriat social a aussi contribué à créer de nouveaux marchés et de nouvelles niches, dans des domaines tels que le commerce équitable (Huybrechts 2012; Nicholls 2010a) ou la micro-finance (Armendáriz de Aghion & Morduch 2005; Battilana & Dorado 2010). Cette dernière est souvent présentée comme le porte-drapeau de l'entrepreneuriat social, notamment depuis que la Grameen Bank et son fondateur Mohammed Yunus se sont vu décerner le Prix Nobel de la Paix. Pratiquement absents des recherches universitaires avant la fin des années 90, l'entrepreneuriat social et les entreprises sociales sont devenus des thèmes de recherche importants depuis lors (Dacin et al. 2010; Defourny & Nyssens 2008b; Fayolle & Matlay 2010; Short et al. 2009), comme en témoigne le nombre croissant d'articles et de livres qui y sont consacrés . Des numéros spéciaux de différents journaux ont mis l'accent sur l'entrepreneuriat social et au moins deux nouveaux journaux ont vu le jour pour traiter spécifiquement de cette thématique et de sujets proches . Bien qu'il soit généralement bien admis que l'entrepreneuriat social et les entreprises sociales restent des notions fort contextuelles – donc contestables – qui peuvent être interprétées de différentes manières suivant l'idéologie et les objectifs des institutions qui les utilisent (Dart 2004; Dey & Steyaert 2010; Nicholls 2010c), certains traits communs commencent néanmoins à faire consensus au sein de la communauté scientifique. Le but de la première section est de présenter et de définir la notion d'entrepreneuriat social. Ensuite, l’entrepreneuriat social est comparé à d’autres notions proches mais néanmoins distinctes. La troisième section se penche sur les origines et les motivations de l'entrepreneuriat social dans une perspective historique. Dans la quatrième section, nous proposons quelques pistes pour mesurer l’ampleur du phénomène. Finalement, les conclusions de ce chapitre évoquent un certain nombre de défis à relever pour les acteurs de terrain, le monde politique et les chercheurs. [less ▲]

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See detailBrain connectivity in disorders of consciousness.
Boly, Mélanie ULg; Massimini, Marcello; Garrido, Marta Isabel et al

in Brain connectivity (2012), 2(1), 1-10

The last 10 years witnessed a considerable increase in our knowledge of brain function in survivors to severe brain injuries with disorders of consciousness (DOC). At the same time, a growing interest ... [more ▼]

The last 10 years witnessed a considerable increase in our knowledge of brain function in survivors to severe brain injuries with disorders of consciousness (DOC). At the same time, a growing interest developed for the use of functional neuroimaging as a new diagnostic tool in these patients. In this context, particular attention has been devoted to connectivity studies-as these, more than measures of brain metabolism, may be more appropriate to capture the dynamics of large populations of neurons. Here, we will review the pros and cons of various connectivity methods as potential diagnostic tools in brain-damaged patients with DOC. We will also discuss the relevance of the study of the level versus the contents of consciousness in this context. [less ▲]

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