Browsing
     by title


0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

or enter first few letters:   
OK
Full Text
Peer Reviewed
See detailFrom Mixed Angles to Infinitesimals
Bair, Jacques ULg; Henry, Valérie ULg

in College Mathematics Journal (2008), 39(3), 230-233

Detailed reference viewed: 71 (10 ULg)
Full Text
Peer Reviewed
See detailFrom model validation to production of reference simulations: how to increase reliability and applicability of building and HVAC simulation models
Adam, Christophe; Andre, Philippe ULg; Georges, Bernard ULg et al

(2006, December)

Validation of simulation models appears from a long time as a key issue in order to promote a more intensive and more efficient use of simulation models in the field of building and HVAC simulation. IEA ... [more ▼]

Validation of simulation models appears from a long time as a key issue in order to promote a more intensive and more efficient use of simulation models in the field of building and HVAC simulation. IEA Annex 34/43 originally targeted a number of specific applications where a more advanced validation was required: ground coupling problems, multizone building, shading, day lighting and cooling load interaction, HVAC components and ventilated facades. These validation exercises were built on the large methodological experience obtained in previous projects and address sometimes very fundamental problems of heat transfer in buildings. Consulting engineers and practitioners might see these exercises as a bit too far from their objectives and it is the reason why an additional activity was proposed with the specific aim of producing, based upon the results of the validation of models, a set of reference simulations. These applications cover a range of building types (residential, commercial) and systems (production, distribution emission) and run in a variety of climates. The paper will describe how models dedicated to these applications were developed, starting from validation results, going through the selection and consolidation of simulation hypothesises and ending with a number that might be considered as reference for the concerned applications. The paper will concentrate on models required by a residential building application (multizone building equipped with a heat pump or a condensing boiler). Simulations make use of both EES and TRNSYS software and both software are applied in parallel as far as possible in the different applications in order to get a better judgment of their potential advantages and drawbacks. The use of reference simulations in view of qualifying normative methods currently in development in the frame of the European Energy Performance in Buildings Directive is also addressed and demonstrated in the paper. [less ▲]

Detailed reference viewed: 150 (9 ULg)
Full Text
Peer Reviewed
See detailFrom model validation to production of reference simulations: how to increase reliability and applicability of building and HVAC simulation models
Andre, Philippe ULg; Georges, Bernard ULg; Lebrun, Jean ULg et al

in Building Services Engineering Research & Technology (2008), 29(1), 61-72

Validation of simulation models appears from a long time as a key issue in order to promote a more intensive and more efficient use of simulation models in the field of building and HVAC simulation. IEA ... [more ▼]

Validation of simulation models appears from a long time as a key issue in order to promote a more intensive and more efficient use of simulation models in the field of building and HVAC simulation. IEA Annex 34/43 originally targeted a number of specific applications where a more advanced validation was required: ground coupling problems, multizone building, shading, day lighting and cooling load interaction, HVAC components and ventilated facades. These validation exercises were built on the large methodological experience obtained in previous projects and address sometimes very fundamental problems of heat transfer in buildings. Consulting engineers and practitioners might see these exercises as a bit too far from their objectives and it is the reason why an additional activity was proposed with the specific aim of producing, based upon the results of the validation of models, a set of reference simulations. These applications cover a range of building types (residential, commercial) and systems (production, distribution emission) and run in a variety of climates. The paper will describe how models dedicated to these applications were developed, starting from validation results, going through the selection and consolidation of simulation hypothesises and ending with a number that might be considered as reference for the concerned applications. The paper will concentrate on models required by a residential building application (multizone building equipped with a heat pump or a condensing boiler, heat emitted by radiators or floor heating systems). Simulations make use of both EES and TRNSYS software and both software are applied in parallel as far as possible in the different applications in order to get a better judgment of their potential advantages and drawbacks. The use of reference simulations in view of qualifying normative methods currently in development in the frame of the European Energy Performance in Buildings Directive is also addressed and demonstrated in the paper. [less ▲]

Detailed reference viewed: 61 (25 ULg)
Full Text
See detailFrom Modern Risks to Reflexive Society - An Alternative Approach to (Bio)terrorism
Brunet, Sébastien ULg; Claisse, Frédéric ULg; Rogister, yves

in Michel, Quentin (Ed.) Terrorisme, regards croisés - Terrorism, cross analysis (2005)

Au départ de quelques normes de portée nationale et internationale dont l'examen souligne la difficulté de parvenir à une définition opératoire du terrorisme, cet article propose un cadrage alternatif du ... [more ▼]

Au départ de quelques normes de portée nationale et internationale dont l'examen souligne la difficulté de parvenir à une définition opératoire du terrorisme, cet article propose un cadrage alternatif du phénomène terroriste fondé sur le paradigme des "risques réflexifs". Sous cet éclairage, le risque terroriste agit comme un véritable révélateur du rapport à notre environnement politique, social et technique: il est l'occasion de mettre en évidence des rapports de force, des relations politiques de domination et de dépendance qui constituent le contexte structurel de conflits locaux, régionaux ou internationaux; mais aussi, plus indirectement, en venant nous rappeler la vulnérabilité de nos collectifs, de plus en plus basés sur le fonctionnement en réseaux, l'interdépendance et le développement de macro-systèmes techniques. Il plaide pour une meilleure prise en compte de la dimension proprement politique du terrorisme et, plus largement, pour un basculement global vers un modèle de société ouverte plus sensible à des facteurs de risque trouvant leur origine dans nos propres pratiques et notre rapport au monde. Comme fil conducteur, des exemples empruntés au bioterrorisme, en ce que le phénomène paraît emblématique de la réflexivité des risques modernes. [less ▲]

Detailed reference viewed: 39 (10 ULg)
Peer Reviewed
See detailFrom Monroe to Moreau: An analysis of face naming errors
Brédart, Serge ULg; Valentine, T.

in Cognition (1992), 45

Detailed reference viewed: 26 (3 ULg)
See detailFrom myopic coordination to resilience in socio-technical systems. A case study in a hospital
Nyssen, Anne-Sophie ULg

in Hollnagel, Erik; Paries, Jean; Woods, David (Eds.) et al Resilience Engineering in Practice: A guidebook (2011)

Detailed reference viewed: 83 (34 ULg)
Full Text
See detailFrom nets to bottom traps: is exploitation of Norway lobsters a suitable option for Corsican common spiny lobster fishermen?
Patrissi, Michela; Astrou, Adèle; Pelaprat, Corinne et al

Poster (2014, May 20)

In Corsica (NW Mediterranean), most of the fishing activity is composed of small-scale artisanal fisheries, and takes place on the western coast. The common spiny lobster (Palinurus elephas) is the main ... [more ▼]

In Corsica (NW Mediterranean), most of the fishing activity is composed of small-scale artisanal fisheries, and takes place on the western coast. The common spiny lobster (Palinurus elephas) is the main target of Corsican netters. However, its populations have been declining since the 1950's, questioning the sustainability of this activity. We therefore tried to assess whether the fishing effort, currently mostly focused on common spiny lobsters, could be moved towards other commercially-interesting deep crustaceans, such as the Norway lobster (Nephrops norvegicus), through diversification of artisanal fishing practices. With the help of local fishermen, we set up Scottish traps for Norway lobsters at depths of 300 to 400 meters, on sandy and muddy bottoms of both eastern and western coasts. Despite several tests using different baits and soak times at various depths or seasons, catches on the western coast were low. On the other hand, on the eastern coast, experimentation showed interesting yields, and large mean size (i.e. high commercial value) for both sexes. While more studies are needed to confirm these results and improve knowledge of Norway lobster stocks, trap fishing of this species on eastern coast of Corsica could be a suitable alternative for diversification of artisanal fisheries. [less ▲]

Detailed reference viewed: 16 (1 ULg)
Full Text
Peer Reviewed
See detailFrom Neural Stem Cells to Myelinating Oligodendrocytes
Rogister, Bernard ULg; Ben Hur, Tamir; Dubois-Dalcq, Monique

in Molecular & Cellular Neuroscience [=MCN] (1999), 14

Detailed reference viewed: 3 (0 ULg)
Peer Reviewed
See detailFrom neurophysiology to genetics: cortical information processing in migraine underlies familial influences--a novel approach
Sandor, P. S.; Afra, J.; Proietti Cecchini, A. P. et al

in Functional Neurology (2000), 15(Suppl 3), 68-72

Migraine patients show impaired cortical information processing between attacks with deficient habituation of pattern-reversal visual evoked potentials (VEP), and strong intensity dependence of auditory ... [more ▼]

Migraine patients show impaired cortical information processing between attacks with deficient habituation of pattern-reversal visual evoked potentials (VEP), and strong intensity dependence of auditory cortical evoked potentials (IDAP). This could be a genetic trait as certain genetic patterns are known for evoked potentials in healthy subjects. VEP-habituation and IDAP were studied in 40 migraine patients, i.e. pairs of 20 parents and their children. We developed a novel approach based on Monte Carlo statistics to selectively assess vertical familial influences. Both groups, parents and children, were characterized by abnormal VEP-habituation and IDAP. However, similarity between related pairs was far more pronounced than similarity between unrelated pairs. Assessed with a novel statistical approach, familial influences proved to be highly significant in determining cortical information processing in migraineurs, thus supporting the important role of genetic factors. [less ▲]

Detailed reference viewed: 26 (4 ULg)
Full Text
Peer Reviewed
See detailFrom Newton's Fluxions to Virtual Microscopes
Bair, Jacques ULg; Henry, Valérie ULg

in Teaching Mathematics and Computer Science (2007), 5(2), 377-384

The method of fluxions was originally given by Newton in order to determine the tangent to a curve. In this note, we will formulate this method by the light of some modern mathematica tools.

Detailed reference viewed: 24 (0 ULg)
Peer Reviewed
See detailFrom Non-invasive Site Characterization to Site Amplification: Recent Advances in the Use of Ambient Vibration Measurements.
Bard, P-Y; et al.; Havenith, Hans-Balder ULg

in Geotechnical, Geological and Earthquake Engineering : Earthquake Engineering in Europe (2010)

Detailed reference viewed: 9 (0 ULg)
Full Text
Peer Reviewed
See detailFrom Normal Business to Financial Crisis... and Back Again. An Illustration of the Benefits of Cassandre for Qualitative Analysis
Lejeune, Christophe ULg

in Forum: Qualitative Sozialforschung = Forum: Qualitative Social Research [FQS] (2011), 12(1), 19

Cassandre is a free open source text analysis software tool. It uses semi-automatic coding, based on the identification of markers, grouped into registers, which represent analysis categories. Studying ... [more ▼]

Cassandre is a free open source text analysis software tool. It uses semi-automatic coding, based on the identification of markers, grouped into registers, which represent analysis categories. Studying the causes of the financial crisis makes it possible to construct a series of registers (responsibility, negligence, domino effect, change and return to normal). Cross-referencing these registers reveals contrasting views (positive and negative) of the economic, political and financial spheres. These conceptions vary both according to how they explain the phenomenon and the measures that they advocate (ranging from the development of new methods to "getting back to normal"). The example of the financial crisis is an opportunity to discuss the benefits of semi-automatic coding and determine the limitations that are likely to impact negatively on the analysis. [less ▲]

Detailed reference viewed: 452 (39 ULg)
Peer Reviewed
See detailFrom obesity to diabetes: why, when and who?
Scheen, André ULg

in Acta Clinica Belgica (2000), 55(1), 9-15

Obesity is considered as the most important risk factor for type 2 diabetes. We will briefly discuss why does obesity predispose to diabetes, when does diabetes occur in obese subjects and who among obese ... [more ▼]

Obesity is considered as the most important risk factor for type 2 diabetes. We will briefly discuss why does obesity predispose to diabetes, when does diabetes occur in obese subjects and who among obese individuals is particularly prone to develop diabetes. Obesity, especially intraabdominal adiposity, is associated with increased FFA plasma concentrations which exert a major negative effect on insulin sensitivity at both muscular and hepatic sites. Various metabolic, haemodynamic and hormonal theories have been proposed to explain insulin resistance in obese subjects. A specific role of TNF-alpha has been recently suggested. However, besides insulin resistance, defective insulin secretion is a prerequisie for the development of overt type 2 diabetes. Both lipotoxicity and glucotoxicity may initiate and perpetuate a vicious circle responsible for the metabolic deterioration. Diabetes occurs as a late phenomenon in obesity and is preceded by years of impaired glucose tolerance. The progression to diabetes is heralded by an inability of the B cell to maintain its previously high rate of insulin secretion in response to glucose in face of insulin resistance. This propensity to develop type 2 diabetes may be genetically determined and/or triggered by environmental factors. The evolution from obesity to diabetes represents a continuum that progresses through different phases in which defects in both insulin action and insulin secretion play a critical interaction and must be looked at in concert. [less ▲]

Detailed reference viewed: 19 (2 ULg)
Peer Reviewed
See detailFrom obesity to type 2 diabetes.
Scheen, André ULg

in Acta Clinica Belgica. Supplementum (1992), 14

Obesity is a well-known risk factor for the development of non-insulin-dependent diabetes mellitus (NIDDM). Both insulin resistance and concomitant B-cell dysfunction are necessary for the development of ... [more ▼]

Obesity is a well-known risk factor for the development of non-insulin-dependent diabetes mellitus (NIDDM). Both insulin resistance and concomitant B-cell dysfunction are necessary for the development of NIDDM. Insulin resistance, probably genetically determined but worsened by obesity, appears to be the primary defect that leads to impaired glucose tolerance. However, B-cell dysfunction plays a critical role during progressive deterioration from mild impaired glucose tolerance to severe NIDDM. [less ▲]

Detailed reference viewed: 16 (0 ULg)
See detailFrom One Loop To Another: From Minimalism To Indie Rock
Levaux, Christophe ULg

Conference (2013, October 05)

Detailed reference viewed: 24 (2 ULg)
Full Text
Peer Reviewed
See detailFrom oxides to selenides and sulfides: The richness of the CdI2 type crystallographic structure for thermoelectric properties
S, Hébert; W, Kobayashi; Y, Bréard et al

in Physica Status Solidi A. Applications and Materials Science (2013), 210(1), 69-81

In this paper, we show how the thermoelectric properties can be modified in crystallographic structures based on the CdI2 type layer, by changing the block layers between these CdI2 type layers or by ... [more ▼]

In this paper, we show how the thermoelectric properties can be modified in crystallographic structures based on the CdI2 type layer, by changing the block layers between these CdI2 type layers or by going from oxides to selenides and sulfides. In the case of oxides, the unique properties generated in these structures will be demonstrated in Bi-based misfit compounds. By combining Hall effect, resistivity, and Seebeck coefficients in single crystals of this family, the importance of doping and of spin and orbital degeneracy term on the Seebeck coefficient will be shown. From this single crystal investigation, the power factor at 300 K is found to be unexpectedly constant as a function of doping. To further enhance the power factor and thus ZT, it is necessary to modify either the block layer or to perform anionic substitutions. By going from oxides to selenides and sulfides, the decrease of the ionic character can induce a decrease of electrical resistivity. Compared to oxides, the properties can generally be described in a more classical way using Boltzmann transport theory. For these materials, the critical parameter is then thermal conductivity and this quantity can be decreased as shown here by intercalating Cu between the layers (CuxTiS2), or by making solid solution such as TiS2 − xSex. These two approaches will be described here, leading to ZT close to 0.5 and 0.4, at 800 and 700 K, respectively. [less ▲]

Detailed reference viewed: 3 (0 ULg)