References of "Paper published in a book"
     in
Bookmark and Share    
Full Text
Peer Reviewed
See detailLe corps du Prince. La perception de l'Egypte ancienne
Winand, Jean ULg

in Marchandisse, Alain (Ed.) Le corps du Prince (2014)

Detailed reference viewed: 58 (3 ULg)
Full Text
Peer Reviewed
See detailExpansion urbaine et risques hydrologiques : cas de Butembo (RD Congo)
Sahani, Muhindo; Ozer, Pierre ULg; Moeyersons, Jan

in Ozer, André; Ozer, Pierre (Eds.) Colloque International "La Géographie Physique et les Risques Naturels" - Livre de résumés (2014)

Butembo constitue un cas typique de zone urbaine en région tropicale humide rencontrant une explosion démographique exceptionnelle. L’exode vers Butembo pour fuir l’insécurité dans la sous-région a ... [more ▼]

Butembo constitue un cas typique de zone urbaine en région tropicale humide rencontrant une explosion démographique exceptionnelle. L’exode vers Butembo pour fuir l’insécurité dans la sous-région a conduit à une rapide concentration spontanée des populations et à une urbanisation sans cesse croissante. L’imperméabilisation des vastes étendues de terres consécutive à cette expansion spatiale rapide de la ville a généré des problèmes environnementaux qui affectent la structure urbaine. La ville est actuellement confrontée à des risques hydrologiques diversifiés : ravinements progressifs et régressifs, inondations, et remobilisation d’anciens glissements de terrain. [less ▲]

Detailed reference viewed: 60 (3 ULg)
Peer Reviewed
See detailA Conceptual Event-Tree Model for Coseismic Landslide Dam Hazard Assessment
Fan, X.; Huang, R.; van Westen, C. et al

in Landslide Science for a Safer Geoenvironment (2014)

Abstract Earthquakes may trigger a series of multiple cascading geohazard phenomena. For example, coseismic landslides may block rivers and form landslide dams, which occur frequently in tectonically ... [more ▼]

Abstract Earthquakes may trigger a series of multiple cascading geohazard phenomena. For example, coseismic landslides may block rivers and form landslide dams, which occur frequently in tectonically active mountains with narrow and steep valleys. The catastrophic release of water masses from landslide-impounded lakes is capable to produce outburst floods and debris flows, causing loss of lives, housing and infrastructure. Quantifying the probability of these cascading phenomena following a triggering event has been a main ... [less ▲]

Detailed reference viewed: 8 (1 ULg)
Full Text
See detailMicromorph brachiopods from the Viséan (Carboniferous) of northwest Ireland
Mottequin, Bernard ULg; Sevastopulo, George; Simon, Eric

in Cerdeno, Esperanza (Ed.) 4th International Palaeontological Congress, Abstract Volume (2014)

Detailed reference viewed: 12 (2 ULg)
Full Text
Peer Reviewed
See detailLe Manuscrit FR. F. V. XIV, 8 de la Bibliothèque nationale de Russie à Saint-Pétersbourg au prisme de l'analyse littéraire et historique
Dumont, Jonathan ULg; Marchandisse, Alain ULg

in Evdokimova, Ludmilla; Smirnova, Victoria (Eds.) L'Oeuvre littéraire du Moyen Âge aux yeux de l'historien et du philologue (2014)

Detailed reference viewed: 20 (3 ULg)
Peer Reviewed
See detailIgE antibodies and FceRI are critical mediators of acquired resistance against honeybee and russell's viper venom in mice
Starkl, Philipp; Marichal, Thomas ULg; Reber, Laurent L. et al

in Proceedings of the EAACI Congress 2014 (2014)

Detailed reference viewed: 17 (1 ULg)
Full Text
Peer Reviewed
See detailAssessment and spatial characterization of pastoral resources in northern Morocco
Chebli, Youssef; Chentouf, Mouad; Cabaraux, Jean-François ULg

in Proceedings of the 1st FARAH Day, Faculty of Veterinary Medicine (2014)

Detailed reference viewed: 13 (0 ULg)
Full Text
Peer Reviewed
See detailImages de guerre dans quelques passions donatistes africaines
Fialon, Sabine ULg

in Coltellonoi-Trannoy; Le Bohec, Yann (Eds.) La guerre dans l'Afrique romaine sous le Haut-Empire (2014)

Detailed reference viewed: 8 (2 ULg)
Full Text
Peer Reviewed
See detailInvestigation of the influence of packing geometry and of liquid viscosity on the liquid flow morphology by using X-ray tomography
Janzen, Anna; Steube, Julia; Kenig, Evgeny et al

in Proceedings of the 7th World Congress on Industrial Process Tomography (2014)

X-ray tomography is used to investigate the influence of packing geometry and of liquid viscosity on hydrodynamic quantities, as well as on the liquid flow morphology inside a packed column successively ... [more ▼]

X-ray tomography is used to investigate the influence of packing geometry and of liquid viscosity on hydrodynamic quantities, as well as on the liquid flow morphology inside a packed column successively filled with two structured metallic packing, M752Y and M500X. As expected, liquid holdup and gas-liquid interfacial area increase with liquid flow rate and viscosity. In both packings, the film flow pattern predominates, while flooded regions remain minority. The influence of liquid flow rate and viscosity on flow morphology depends on the packing geometry. In M752Y, film and flooded region flows are clearly influenced, whereas in M500X, they are not. [less ▲]

Detailed reference viewed: 31 (3 ULg)
Full Text
Peer Reviewed
See detailA Simplified procedure to assess the dynamic pressures on large reservoirs
Buldgen, Loïc ULg; Degée, Hervé ULg; Le Sourne, Hervé et al

in Proceedings of the 9th International Conference on Structural Dynamics - EURODYN 2014 (2014)

Detailed reference viewed: 14 (2 ULg)
Full Text
Peer Reviewed
See detailFirst assessment of the impacts of Saharan dust events on the respiratory health in West Africa: A case study in the Northern Benin
De Longueville, Florence ULg; Henry, Sabine; Ozer, Pierre ULg

in Belviso, Claudia; Fiore, Saverio; Giannossi, Maria Luigia (Eds.) DUST2014 - International Conference on Atmospheric Dust _ Book of Abstracts (2014)

More than 50% of the global dust emitted into the atmosphere comes from the Sahara. About 60% of the Saharan dust move southwards to the Gulf of Guinea (Engelstaedter et al., 2006). Once in the air, these ... [more ▼]

More than 50% of the global dust emitted into the atmosphere comes from the Sahara. About 60% of the Saharan dust move southwards to the Gulf of Guinea (Engelstaedter et al., 2006). Once in the air, these dust contribute to increase the concentrations of particles smaller than 10 microns (PM10), which are respirable particles (Ozer et al. 2005). A number of adverse health effects have been associated with desert dust, including respiratory diseases (Goudie, 2014). [...] [less ▲]

Detailed reference viewed: 47 (2 ULg)
Full Text
Peer Reviewed
See detailDescribing the ‘elusive’ : Availability, Preparation and Use of Anthocyanin Colourants in Mediaeval European Illuminators’ Workshops
Neven, Sylvie ULg; Sanyova, Jana

in Dubois, Hélène; Eyb-Green, Sigrid; Kroustallis, Stephanos (Eds.) et al Making and transforming art : changes in artists’ materials and practice (2014)

Anthocyanins are colorants which provide most of the blue, red and violet colours in numerous plants and fruits. Because of their great sensitivity to the slightest changes in pH and their instability in ... [more ▼]

Anthocyanins are colorants which provide most of the blue, red and violet colours in numerous plants and fruits. Because of their great sensitivity to the slightest changes in pH and their instability in ordinary daylight, it is generally thought that these colorants were used only to dye everyday clothes in a domestic context. However, medieval artists’ recipe books not only describe these elusive substances, but also indicate their use in illumination. This is notably the case for the texts of the so-called ‘Strasbourg Tradition’, written in the south of Germany and the north of France between 1400 and 1560, and partly composed from an older Alsatian treatise on illumination. Departing from these sources, this paper details the methods employed to prepare these colorants and (re)evaluates their diverse uses in painting and illuminating techniques. This technical data subsequently served as a basis upon which to make reconstructions. Finally, an attempt to correlate the information provided by these recipe books with specific artistic practices was carried out by collating the descriptions with the results of analyses from contemporary illuminations by an Alsatian workshop active in the same geographical area. [less ▲]

Detailed reference viewed: 31 (9 ULg)
Full Text
Peer Reviewed
See detailTerqa Ceramic Culture during the 3rd Millennium BC. Material from 18th-26th Excavation Campaigns
Mas, Juliette ULg

in Bieliński, P; Gawlikowski, M; Koliński, R (Eds.) et al Proceedings of the 8th International Congress on the Archaeology of the Ancient Near East, 30 April – 4 May 2012, University of Warsaw, Volume 2: Excavation and Progress Reports, Posters (2014)

Terqa, an important Syrian Bronze Age site located in the Lower Middle-Euphrates region, benefited from a key position which provided the settlement with the opportunity to gain from exchanges and ... [more ▼]

Terqa, an important Syrian Bronze Age site located in the Lower Middle-Euphrates region, benefited from a key position which provided the settlement with the opportunity to gain from exchanges and innovations arriving from both the North and South, while developing its own identity and culture. A new study on pottery has just been carried out on 3rd-millennium material from eight excavation seasons. The recovered material has been used to specify Terqa’s chronostratigraphy with greater accuracy, comparing it with the neighboring site of Mari and other contemporary ones but also providing us with a preliminary overview of Terqa’s ceramic culture during the Early Bronze Age. [less ▲]

Detailed reference viewed: 34 (16 ULg)
Peer Reviewed
See detailEstetrol and neuroprotection against perinatal ischemic insult
Tskitishvili, Ekaterine ULg; Nisolle, Michelle ULg; Noël, Agnès ULg et al

in Estetrol attenuates neonatal hypoxic-ischemic brain injury (2014)

Detailed reference viewed: 20 (6 ULg)
Full Text
Peer Reviewed
See detailAssessing the Probability of Training Image-Based Geological Scenarios Using Geophysical Data
Hermans, Thomas ULg; Caers, Jef; Nguyen, Frédéric ULg

in Pardo-Iguzquiza, Eulogio; Guardiola-Albert, Carolina; Heredia, Javier (Eds.) et al Mathematics of Planet Earth - Proceedings of the 15th Annual Conference of the International Association for Mathematical Geosciences (2014)

In multiple-point statistics (MPS), the construction of training im-ages (TIs) is one of the most critical steps. Reliable geological studies may not always be available to depict with certainty what ... [more ▼]

In multiple-point statistics (MPS), the construction of training im-ages (TIs) is one of the most critical steps. Reliable geological studies may not always be available to depict with certainty what geological patterns or heterogeneity are present. In this context, geophysical techniques may provide additional information to reduce the possible large uncertainty in the understanding of prior geological scenarios. To overcome this problem, we developed a methodology to verify the consistency of geophysical data with independently-built TIs representing different plausible geological scenarios. If a TI is deemed consistent with the field geophysical survey, then in a sec-ond step we calculate a likelihood probability for each consistent TI. Our methodology starts by creating subsurface models with each TI. From these models we create synthetic geophysical data and from this synthetic data, synthetic inverted models. These models are now compared with a single inverted model obtained from the field sur-vey, allowing for our definition of what is “consistent”. To that ex-tent, we calculate the Euclidean distance between any two inverted models as well as field data and visualize the results in a 2D or 3D space using multidimensional scaling (MDS). With this technique, it is possible to verify if field cases fall in the distribution represented by synthetic cases, and thus are consistent with them. In a second step, we present a cluster analysis on the MDS-map to highlight which parameters are the most sensitive for the construction of TI. Based on this analysis, a probability of each geological scenario is computed through kernel smoothing of the densities in reduced pro-jected metric space. This approach was tested using electrical resistivity tomography as geophysical data to analyze TI scenarios for the Meuse alluvial aqui-fer (Belgium), where the lack of reliable sedimentological data lead to the definition of a multitude of geological scenarios, hence TIs. [less ▲]

Detailed reference viewed: 52 (20 ULg)
Full Text
Peer Reviewed
See detailThe Relation Between The Food Price And The Climatic and Agricultural Factors In Republic of Niger
Andres, Ludovic ULg; Du Faux, Judith ULg; Lebailly, Philippe ULg

in Akın Olgun, F.; Kurtović, Mirsad; Filya, Ismail (Eds.) 25th International Scientific-Experts Congress on Agriculture and Food Industry : Book of abstracts (2014)

In the republic of Niger, the food price is very important for the farmers because the agricultural and livestock activities represent the main income of rural population. Furthermore, the temporary ... [more ▼]

In the republic of Niger, the food price is very important for the farmers because the agricultural and livestock activities represent the main income of rural population. Furthermore, the temporary disruptions (climate, environment) influence the food price. The target of this paper is to demonstrate the evolution of the millet current prices and the link between the prices and the annual temporary disruptions. The first factor is the monthly current prices of millet because it is the main food consumed by the rural population. The period taken into consideration is twenty years. The second factor is the annual precipitation and the number of raining days. The third factor is based on the millet production (production, yield, area). In the first time, we analyze the time series of monthly prices of millet with a mixed model. In the second time, an correlation compares the link between the “environmental” factors and the prices series. In conclusion, the time series studies of millet prices have demonstrated the cycle of these and their seasonality. Furthermore, the correlation has showed a difference between the studied factors and the millet prices. The main result is the demonstration of two time period: higher prices (May to August) and lower prices (October to January). [less ▲]

Detailed reference viewed: 45 (8 ULg)
Full Text
See detailLes apports des travaux de la consultation du PUCA et les pistes de recherche
Merenne-Schoumaker, Bernadette ULg

in Lemercier, Evelyne (Ed.) Localisation des activités économiques et développement durable des territoires (2014)

Highlighting the results of the work that we have accompanied for three years by focusing on two questions of the research program: the location of economic activity it induces a local sustainable ... [more ▼]

Highlighting the results of the work that we have accompanied for three years by focusing on two questions of the research program: the location of economic activity it induces a local sustainable development and how the consideration of sustainable development changes does the issue of the location of these activities? Opening new avenues for further work [less ▲]

Detailed reference viewed: 40 (0 ULg)
Full Text
See detailFlora Lumut Jati (Bryophyta) di Hutan Simpan Gunung Tebu dan Kawasan Sekitarnya, Terengganu
Damanhuri, Ahmad; Maideen, Haja; Nur-Aqidah, N. et al

in Abd. Rahim, Abd. Rahman; Abu Hassan, Mohd. Nasir; Nordin, Azmi (Eds.) et al Hutan Simpan Gunung Tebu, Terengganu: Pengurusan Hutan, Persekitaran Fizikal dan Kepelbagaian Biologi (2014)

Flora lumut jati di Hutan Simpan Gunung Tebu dan kawasan sekitarnya terdiri daripada 100 spesies, 7 subspesies dan 20 varieti dalam 46 genus dan 18 famili. Bilangan ini mewakili 22.8% daripada 558 takson ... [more ▼]

Flora lumut jati di Hutan Simpan Gunung Tebu dan kawasan sekitarnya terdiri daripada 100 spesies, 7 subspesies dan 20 varieti dalam 46 genus dan 18 famili. Bilangan ini mewakili 22.8% daripada 558 takson pada peringkat spesies dan ke bawah, 29.1% daripada 158 genus dan 39.1% daripada 46 famili yang telah dilaporkan bagi Semenanjung Malaysia sehingga kini. Bilangan ini juga mewakili 61.1% daripada 208 takson pada peringakat spesies dan ke bawah yang dilaporkan terdapat di negeri Terengganu. Daripada 127 takson yang ditemui, 16 spesies, dua subspesies dan satu varieti dilaporkan buat pertama kali bagi negeri Terengganu. Calymperaceae merupakan famili terbesar dengan 38 takson atau mewakili 29.9% daripada jumlah keseluruhan takson yang telah direkodkan bagi kawasan ini. Sematophyllaceae yang diwakili oleh 34 takson atau 26.8% adalah famili kedua terbesar. Genus yang besar dicatatkan di kawasan ini pula adalah Calymperes dengan 12 takson dan diikuti rapat oleh Syrrhopodon dengan 11 takson, kedua-duanya daripada famili Calymperacea. [less ▲]

Detailed reference viewed: 9 (2 ULg)
Full Text
Peer Reviewed
See detailDétermination des propriétés de couches minces dans le béton à l’aide d’un géoradar commercial à hautes fréquences: approche pic-à-pic et analyse fréquentielle du coefficient de réflexion
Van der Wielen, Audrey; Courard, Luc ULg; Nguyen, Frédéric ULg

in Balayssac, Jean-Paul (Ed.) Compte-rendus de Diagnobeton 2014 (2014)

The Ground Penetrating Radar (GPR) is an efficient tool for the non-destructive inspection of concrete structures. It is widely used for the detection of rebars or humid zones or for evaluating the ... [more ▼]

The Ground Penetrating Radar (GPR) is an efficient tool for the non-destructive inspection of concrete structures. It is widely used for the detection of rebars or humid zones or for evaluating the thickness of elements. But when an element contains a thin layer, the radar waves are submitted to multiple reflections on the interfaces and the layer appears in the radargram as a single reflection, whose detailed analysis can allow determining the thickness and the permittivity of the thin layer. Two approaches were considered in this paper. In the first one, the analysis is based on the peak-to-peak reflection amplitude. The second approach uses a frequency analysis of the reflection coefficient, whose amplitude and phase can then be calculated for several frequencies. With this method, the thickness and permittivity of the layer can in theory be simultaneously determined. Both methods were numerically validated through finite difference simulations and experimentally tested on concrete samples containing an air layer of variable thickness. We showed that the frequency analysis allowed to reach a higher precision in the parameters estimation for a limited additional computing cost. The method efficiency depends on the conditions and is optimal for layers with a high permittivity presenting a large contrast with the matrix. [less ▲]

Detailed reference viewed: 15 (0 ULg)
Full Text
Peer Reviewed
See detailStone tool hafting in the Middle Palaeolithic as viewed through the microscope
Rots, Veerle ULg

in Marreiros, Juan; Bicho, Nuno; Gibaja, Juan (Eds.) Proceedings of the Use-wear conference at Faro, Portugal (2014)

Detailed reference viewed: 35 (11 ULg)
See detailAnalysis of mass movements affecting the region of Constantine
Draidia, Salah ULg; Havenith, Hans-Balder ULg; Benabbas, C.

in EGU General Assembly Conference Abstracts (2014)

Abstract: Mass movements are a very frequent phenomenon in the North-Eastern Algeria, causing a lot of damages among the population and on the infrastructures and representing the most important geohazard ... [more ▼]

Abstract: Mass movements are a very frequent phenomenon in the North-Eastern Algeria, causing a lot of damages among the population and on the infrastructures and representing the most important geohazard. This paper presents some results of the analysis of slope instabilities in many places in the region and especially along the East-West highway. The work show many types of failures characterized by a high degree of heterogeneity. It is clear that the landslides in this area are very complex, in the most cases a combination of ... [less ▲]

Detailed reference viewed: 12 (1 ULg)
Full Text
Peer Reviewed
See detailSEISMIC ASSESSMENT OF MASONRY BUILDINGS FROM SHAKING TABLE TESTS AND NONLINEAR DYNAMIC SIMULATIONS BY THE PROPER ORTHOGONAL DECOMPOSITION (POD)
Cattari, Serena; Chioccariello, Ambra; Degée, Hervé et al

in Proceedings of the Second European Conference on Earthquake Engineering and Seismology (2014)

The paper focuses on the interpretation and numerical simulation of the results of shaking table tests on two masonry buildings mock-ups, performed at Laboratório Nacional de Engenharia Civil (LNEC) in ... [more ▼]

The paper focuses on the interpretation and numerical simulation of the results of shaking table tests on two masonry buildings mock-ups, performed at Laboratório Nacional de Engenharia Civil (LNEC) in Lisbon, within the purposes of the SERIES project Transnational Access activities (Mendes et al. 2014, Lu et al. 2014). Shaking table tests have produced a huge amount of remarkable data that need to be properly interpreted, in order to get general and synthetic information on the seismic behaviour. To this aim, different techniques of data interpretation are applied, consisting in some traditional approaches (e.g. the frequencies analysis or the identification of an equivalent linear system) and in the innovative use of the Proper Orthogonal Decomposition (POD) technique. Together with the interpretation of experimental results, the paper also illustrates the nonlinear dynamic simulation of these two models by Tremuri program (Lagomarsino et al. 2013), which is based on the equivalent frame approach. The results achieved showed a good agreement between experimental and numerical results, highlighting that the tools adopted are quite effective in interpreting the nonlinear response of URM masonry structures. [less ▲]

Detailed reference viewed: 35 (7 ULg)
Full Text
See detailDesigning and testing an air-PCM heat exchanger for building ventilation application coupled to energy storage
Dechesne, Bertrand ULg; Gendebien, Samuel ULg; Martens, Jonathan et al

in 2014 Purdue Conferences Proceedings (2014)

This paper studies a PCM heat exchanger coupled to a building ventilation system. This PCM module can either store heat during the day (e.g. by cooling solar PV panels) and restore it to the building ... [more ▼]

This paper studies a PCM heat exchanger coupled to a building ventilation system. This PCM module can either store heat during the day (e.g. by cooling solar PV panels) and restore it to the building during the night for space heating purposes or store coolness during the night and give it back during the day and thus act as a free cooling system. This project aims to develop a performing air-PCM heat exchanger providing latent energy storage of 0.5 kWh, this energy is delivered between 15 and 30°C. This heat exchanger is based on corrugated cells that can be easily filled, lined up and then locked in a box, letting the air pass between the cells. The PCM used for the prototype is c omposed of fatty acids. In order to develop an efficient PCM ventilation module, two different ways of investigation were followed and used in parallel. The first one used CFD simulations and the second one, a semi-empirical model based on correlations. The CFD simulations were able to predict the convection coefficient on the air side and also show the flow repartition between the different channels whereas the semi-empirical model allowed a parametrical study in order to identify the best geometry possible. Once the heat exchanger geometry was optimized, a test bench was built and a prototype of air-PCM heat exchanger was manufactured in order to measure its thermal and hydraulic performances. The tests consist in either a complete solidification or liquefaction of the PCM starting from respectively liquid PCM at 30°C or solid PCM at 15°C. The airflow rate was set to 45m³/h, which corresponds barely to the ventilation rate of a traditional room in a residential building. A comparison between the models and the measurements was carried out in order to calibrate the semi-empirical model. It will be shown that a simple semi-empirical model satisfactorily predicts the evolution of heat transfer rate for different operating conditions. [less ▲]

Detailed reference viewed: 131 (23 ULg)
Peer Reviewed
See detailSTEREO MATCHING METHOD USING MULTIPLE ANGULAR SIGNATURES MATCHED BY MULTIDIMENSIONAL DYNAMIC TIMEWARPING (MD-DTW)
Grogna, David ULg; Guerri, Géraldine; Verly, Jacques ULg

in IEEE Xplore Digital Library (2014)

We consider the problem of matching interest points (IPs) extracted from the two images of a stereoscopic pair. We describe each IP via a descriptor consisting in one angular signature for a grayscale ... [more ▼]

We consider the problem of matching interest points (IPs) extracted from the two images of a stereoscopic pair. We describe each IP via a descriptor consisting in one angular signature for a grayscale image, three signatures for a color image, and, more generally, N signatures for N coregistered images of different modalities. Each angular signature is generated by spinning a “steerable x-tapered, y-derivative, half-Gaussian filter” 360° around each IP. The novel contribution of the paper is the use of multidimensional dynamic time warping (MD-DTW) for (1) producing a single, common warping for all pairs of corresponding signatures in the two descriptors of two IPs that are candidate for matching, and (2) for computing a single related distance between the two sets of signatures. Preliminary experimental results and a comparison with the results obtained with SIFT descriptors and matching via the smallest Euclidean distance in parameter space demonstrates the value of this novel approach. [less ▲]

Detailed reference viewed: 32 (4 ULg)
Full Text
Peer Reviewed
See detailLe miroitement des mots
Verbeeck, Muriel ULg; Buyle, Marjan

in Buyle, Marjan (Ed.) Lustre et brillance en conservation-restauration - Glans in de conservait-restauratie (2014)

Detailed reference viewed: 9 (2 ULg)
Full Text
Peer Reviewed
See detailCharacterization of olive cake production in northern Morocco
El Otmani, Samira; Ayadi, Mohammed; Chentouf, Mouad et al

in 1st FARAH Day, Faculty of Veterinary Medicine (2014)

Detailed reference viewed: 6 (0 ULg)
Full Text
See detailClimate-proofing of large reservoirs in Belgium by the development of enhanced operation rules
Bruwier, Martin ULg; Dewals, Benjamin ULg; Erpicum, Sébastien ULg et al

in 3rd IAHR Europe Congress (2014)

Available climate change scenarios project drier summers and more humid winters for Belgium. This study addresses the impacts of those changes on the management of two multi-purpose reservoirs located in ... [more ▼]

Available climate change scenarios project drier summers and more humid winters for Belgium. This study addresses the impacts of those changes on the management of two multi-purpose reservoirs located in the Vesdre basin, and the search of enhanced operation rules to mitigate those changes. For this purpose, an integrated model is used, including a hydrological model of the Vesdre watershed, a hydraulic model of this river, a model of the dam complex operation rules and a flood risk model. Performance indicators of the dams are defined, representing drinking water production, damages due to floods, hydropower production and low-flow enrichment. First, a sensitivity analysis of the main parameters of the dam operation rules on the performance indicators is achieved. Afterwards, for two extreme climate scenarios at the time horizons 2021-2050 and 2071-2100, impacts of climate change on the reservoir performances are determined. Then, the results of the sensitivity analysis are used to indicate if climate change impacts may be mitigated by means of enhanced operation rules. [less ▲]

Detailed reference viewed: 69 (35 ULg)
Full Text
See detailChemical abundances of fast-rotating OB stars
Cazorla, Constantin ULg; Morel, Thierry ULg; Nazé, Yaël ULg et al

in Proceedings of the International Astronomical Union - New windows on massive stars: asteroseismology, interferometry, and spectropolarimetry (2014)

Fast rotation in massive stars is predicted to induce mixing in their interior, but a population of fast-rotating stars with normal nitrogen abundances at their surface has recently been revealed (Hunter ... [more ▼]

Fast rotation in massive stars is predicted to induce mixing in their interior, but a population of fast-rotating stars with normal nitrogen abundances at their surface has recently been revealed (Hunter et al. 2009; Brott et al. 2011, but see Maeder et al. 2014). However, as the binary fraction of these stars is unknown, no definitive statements about the ability of single-star evolutionary models including rotation to reproduce these observations can be made. Our work combines for the first time a detailed surface abundance analysis with a radial-velocity monitoring for a sample of bright, fast-rotating Galactic OB stars to put strong constraints on stellar evolutionary and interior models. [less ▲]

Detailed reference viewed: 34 (25 ULg)
Full Text
Peer Reviewed
See detailMise en ligne, mise à jour et mise en réseau du Französisches Etymologisches Wörterbuch
Renders, Pascale ULg

in Trotter, David; Bozzi, Andrea; Fairon, Cédrick (Eds.) Actes du XXVIIe Congrès international de linguistique et de philologie romanes (Nancy, 15-20 juillet 2013). Section 16 : Projets en cours; ressources et outils nouveaux (2014)

Detailed reference viewed: 17 (0 ULg)
Peer Reviewed
See detailRepresentations for Cross-task, Cross-object Grasp Transfer
Hjelm, Martin; Detry, Renaud ULg; Ek, Carl Henrik et al

in IEEE International Conference on Robotics and Automation (2014)

Detailed reference viewed: 45 (0 ULg)
Full Text
Peer Reviewed
See detailInvestigation of pregnancy-associated glycoproteins (PAGs) by means of an enzymoimunoassay (ELISA) sandwich kit for pregnancy monitoring in sheep
El Amiri, Bouchra; Delahaut, Philippe; Colemans, Yves et al

in Chentouf, M; López-Francos, A; Bengoumi, M (Eds.) et al Options méditerranéennes : Series A (2014)

The aim of the present study was to investigate the use of a PAGs ELISA-Sandwich kit (Ret. code E.G.7. CER. Marloie, Belgium) for both early pregnancy diagnosis (in Sardi sheep) and the pregnancy follow ... [more ▼]

The aim of the present study was to investigate the use of a PAGs ELISA-Sandwich kit (Ret. code E.G.7. CER. Marloie, Belgium) for both early pregnancy diagnosis (in Sardi sheep) and the pregnancy follow up (in Boujaâd and Boujaâd x D'man sheep). ln Sardi breed, plasma samples were obtained from pregnant ewes (n = 17) from day 18 to 30 of gestation at 2 days interval. ln Boujaâd (n = 8) and Boujaâd x D'man (n = 20) the blood samples were weekly collected from the first week of gestation till the 4th week after lambing. The PAG concentrations were determined by a sandwich-ELISA based on purified bovine PAG (boPAG-67 kDa) as a standard, the antiserum raised against caprine PAG (caPAG-55+62 kDa) as a capture antibody (1/40000) and antiserum raised against purified PAG from buffalo (AS 859) as detection antibody (1/32 000). The Avidin-HRP and TMB were used to reveal reactions. Ewes were assumed to be pregnant when PAG concentrations were higher than 0.8 ng/ml. Results showed that in Sardi sheep it is possible to detect ail ewes as pregnant as early as on 24 days of gestation. ln Boujaâd and Boujaâd x D'man the PAG concentrations reached the higher values just before lambing. This value is higher in ewes carrying more than one lamb than in those carrying a single lamb. To conclude, the present study shows that the ELISA kit used for early pregnancy diagnosis in sheep as weil as for pregnancy fellow up could be a good alternative to the radioimmunoassay RIA in countries where this last technique is hard to set up. [less ▲]

Detailed reference viewed: 103 (1 ULg)
Full Text
See detailUncertainty quantification of the orbital lifetime of a LEO spacecraft
Dell'Elce, Lamberto ULg; Kerschen, Gaëtan ULg

in Proceedings of the Astrodynamics Specialist Conference (2014)

Orbital lifetime estimation is a problem of great timeliness and importance in astrodynamics. In view of the stochastic nature of the thermosphere and of the complexity of drag modeling, any deterministic ... [more ▼]

Orbital lifetime estimation is a problem of great timeliness and importance in astrodynamics. In view of the stochastic nature of the thermosphere and of the complexity of drag modeling, any deterministic assessment of orbital lifetime is likely to be bound to failure. This is why the present paper performs uncertainty quantification of satellite orbital lifetime estimation. Uncertainties in the initial state of the satellite and in the atmospheric drag force, as well as uncertainties introduced by modeling limitations associated with atmospheric density models, are considered. Mathematical statistics methods in conjunction with mechanical modeling considerations are used to infer the probabilistic characterization of these uncertainties from experimental data and atmospheric density models. Monte Carlo propagation is then exploited to achieve a probabilistic description of the orbital lifetime. [less ▲]

Detailed reference viewed: 34 (11 ULg)
Peer Reviewed
See detailExtension of the Liège INC model to spallation reactions at a few GeV proton incident energy
Cugnon, Joseph ULg; Boudard, A.; David, J.-C. et al

in Proceedings of the 11th International Topical Meeting on Nuclear Applications of Accelerators (AccApp 2013) (2014)

Detailed reference viewed: 10 (1 ULg)
Full Text
Peer Reviewed
See detailLOGIC : Un service GeoWeb d'aide à la décision et à la coopération des élus en matière d'implantations commerciales
Jaspard, Mathieu ULg

in 1ère Conférence Intercontinentale d'Intelligence Territoriale "Interdisciplinarité dans l'aménagement et développement des territoires" (2014)

Detailed reference viewed: 6 (0 ULg)
Full Text
Peer Reviewed
See detailFrom Landscape to Garden to Landscape: Traveling Through the Scales of Perception
Szanto, Catherine ULg

in Martinho Da Silva, I.; Portela Marques, T.; Andrade, G. (Eds.) Proceedings of ECLAS 2014: Landscape: a Place of Cultivation (2014)

Since one of today’s issues is to help society’s regain “landscape literacy” in order to preserve a harmonious relationship between men and their environment, the question is whether and how the garden ... [more ▼]

Since one of today’s issues is to help society’s regain “landscape literacy” in order to preserve a harmonious relationship between men and their environment, the question is whether and how the garden could be used as a means to heighten sensitivity and understanding of the larger landscape, and how working on the small scale of the garden can help people gain an understanding of the large scale of the landscape. The paper discusses some of the theoretical underpinnings (landscape perception, landscape meaning) of the dialogue between landscape architectural scales. [less ▲]

Detailed reference viewed: 21 (0 ULg)
Peer Reviewed
See detailBelgian mud mounds, facies and structure and stromatoporoid fauna
Da Silva, Anne-Christine ULg; Kershaw, S.; Boulvain, Frédéric ULg et al

in Wesenberg Lauridsen, b.; Bjerager, M. (Eds.) Cold water carbonates at high paleolatitudes from the Palaeozoic to the Reent – combining outcrops studies with core studies and geophysical imaging. Programme and abstract book (2014)

Detailed reference viewed: 22 (9 ULg)
Full Text
Peer Reviewed
See detailÉtalement urbain et vulnérabilité croissante face au risque d’inondation : l’exemple de Nouakchott (Mauritanie)
Ozer, Pierre ULg; Ould Sidi Cheikh, Mohamed Ahmed; Ozer, André ULg

in Ozer, André; Ozer, Pierre (Eds.) Colloque International "La Géographie Physique et les Risques Naturels" - Livre de résumés (2014)

Après la sécheresse et la désertification qui ont fortement frappé la Mauritanie dans les années 1970 et 1980, la ville de Nouakchott a connu un développement démographique spectaculaire. En effet, la ... [more ▼]

Après la sécheresse et la désertification qui ont fortement frappé la Mauritanie dans les années 1970 et 1980, la ville de Nouakchott a connu un développement démographique spectaculaire. En effet, la population de la capitale mauritanienne est passée de 134 704 habitants en 1977 à 899 887 habitants recensés en mars 2013. Depuis 2000, Nouakchott voit sa population augmenter de 125 personnes par semaine ; une croissance absolue jamais atteinte par le passé. La ville s'est donc agrandie considérablement et les nouveaux arrivants ont construit leurs maisons dans des zones marginales sans aménagement préalable. Plusieurs quartiers se sont installés soit dans des zones dépressionnaires à sols salés sous forme de sebkha, soit dans des zones dunaires fortement ensablées. [less ▲]

Detailed reference viewed: 90 (11 ULg)
Full Text
Peer Reviewed
See detailHow and why did Hatshepsut invent the image of her royal power?
Laboury, Dimitri ULg

in Galan, José Manuel; Bryan, Betsy M.; Dorman, Peter F. (Eds.) Creativity and Innovation in the Reign of Hatshepsut (2014)

Detailed reference viewed: 98 (3 ULg)
Full Text
Peer Reviewed
See detailUnmodified quartz flake fragments as cognitive tool categories : testing the wear preservation, previous low magnification use-wear results and criteria for tool blank selection in two Late Mesolithic quartz assemblages from Finland
Taipale, Noora ULg; Knutsson, Kjel; Knutsson, Helena

in Marreiros, João; Bicho, Nuno; Gibaja Bao, Juan (Eds.) International Conference on Use-Wear Analysis : Use-Wear 2012 (2014)

We present the results of the first microwear analysis made on quartz artefacts excavated in Finland. Fifty-nine pieces from two Late Mesolithic sites were analyzed, including both morphological tools and ... [more ▼]

We present the results of the first microwear analysis made on quartz artefacts excavated in Finland. Fifty-nine pieces from two Late Mesolithic sites were analyzed, including both morphological tools and unmodified flakes and flake fragments. Both assemblages have been previously analyzed using a stereomicroscope (Pesonen & Tallavaara 2006, Rankama & Kankaanpää 2011). Our results show that unmodified quartz fragments have been utilized as tools and therefore new tool categories can be found among the material previously treated as production waste. The results also indicate that the reliability of low magnification analysis depends greatly on the level of wear preservation, as well as on tool edge morphology, as obtuse-angled working edges could only be identified as used with high magnifications. Preliminary observations about possible tool blank selection criteria, such as the preference of intact flakes over flake fragments, should be tested with larger and more varied samples. [less ▲]

Detailed reference viewed: 21 (2 ULg)
Full Text
Peer Reviewed
See detail"Colour ConText". A Database on Colour Practice and Colour Knowledge in Pre-Modern Europe
Neven, Sylvie ULg; Leonhard, Karin; Dupré, Sven

in Dubois, Hélène; Eyb-Green, Sigrid; Kroustallis, Stephanos (Eds.) et al Making and transforming art : changes in artists’ materials and practice (2014)

Detailed reference viewed: 61 (6 ULg)
Peer Reviewed
See detailSuitability of the soil map and legacy data in wallonia (BE) to support the GSM initiative
Legrain, Xavier ULg; Bock, Laurent ULg; Colinet, Gilles ULg

in Arrouays, Dominique; McKenzie, Neil; Hempel, Jon (Eds.) et al GlobalSoilMap - Basis of the global spatial soil information system (2014)

Belgium is covered with large-scale soil map and high density of historical profiles, now available in a numerical format. This papier first gives an overview of the soil properties which can be predicted ... [more ▼]

Belgium is covered with large-scale soil map and high density of historical profiles, now available in a numerical format. This papier first gives an overview of the soil properties which can be predicted from these documents, in combination with the legacy data, and of the uncertainty we can expect for now. The great potential of the soil map is highlighted, as well as its complexity. Example of the soil depth to rock points out the need of a thorough understanding of the soil map in order (i) to interpret correctly the information hidden behind each symbols or emerging from their combination and (ii) to take into account the sub-regional features. Expert knowledge seems essential, associated with historical and new hard data, in order to build a rich and confident map which respects the recommendations of the GlobalSoilMap.net project. [less ▲]

Detailed reference viewed: 18 (2 ULg)
Full Text
Peer Reviewed
See detailFace à la globalisation : de l’interculturalité implicite à l’interculturalité engagée
Defays, Jean-Marc ULg

in EID, Cynthia; FADEL, Fady (Eds.) Interculturalité : Etat des lieux et perspectives, théories et pratiques (2014)

Detailed reference viewed: 70 (15 ULg)
Full Text
See detailReference values for isometric endurance of the neck flexor and extensor muscles in healthy volunteers
Demoulin, Christophe ULg; Degioanni, K.; GROSDENT, Stéphanie ULg et al

in Abstract Book of 7th Biennial Congress of The Belgian Back Society (2014)

Detailed reference viewed: 15 (5 ULg)
Full Text
Peer Reviewed
See detailCaractéristiques des pluies et ravinement dans la ville de Kinshasa de 1961 à 2010
Makanzu, Fils; Ozer, Pierre ULg; Moeyersons, Jan

in Ozer, André; Ozer, Pierre (Eds.) Colloque International "La Géographie Physique et les Risques Naturels" - Livre de résumés (2014)

Cette étude traite de l’évolution des caractéristiques pluviométriques dans la ville de Kinshasa de 1961 à 2010. Elle mène une analyse minutieuse des tendances qui se focalise sur les événements extrêmes ... [more ▼]

Cette étude traite de l’évolution des caractéristiques pluviométriques dans la ville de Kinshasa de 1961 à 2010. Elle mène une analyse minutieuse des tendances qui se focalise sur les événements extrêmes, les anomalies et le nombre de jours de pluies. Cette étude répond également au manque d’informations sur les tendances des variables pluviométriques et des extrêmes climatiques dans la sous-région de l’Afrique centrale. Elle recherche et évalue les preuves des changements dans l'intensité des événements pluvieux extrêmes quotidiens. Enfin, elle estime et caractérise les périodes de retour des événements pluvieux extrêmes dans la ville. [less ▲]

Detailed reference viewed: 64 (6 ULg)
Full Text
Peer Reviewed
See detailEscouloubre Piano Key weir: prototype versus scale models
Erpicum, Sébastien ULg; Silvestri, Aurélien ULg; Dewals, Benjamin ULg et al

in Erpicum, Sébastien; Laugier, Frédéric; Pfister, Michael (Eds.) et al Labyrinth and Piano Key Weirs II - PKW 2013 (2014)

A 1.77 m high piano key weir in operation on the Escouloubre balance basin enabled the observation of real size flows for discharges ranging from 1.2 to 10 m³/s, corresponding to upstream heads ranging ... [more ▼]

A 1.77 m high piano key weir in operation on the Escouloubre balance basin enabled the observation of real size flows for discharges ranging from 1.2 to 10 m³/s, corresponding to upstream heads ranging from 11 to 48 cm. These observations are depicted and compared to the results gained on three physical models of the weir, built and operated considering a Froude similitude and geometric scale factors of, respectively, 1:7, 1:15 and 1:25. The study highlights the scale effects which may affect piano key weirs scale model studies and provides criteria to limit them. In particular, the results analysis shows that the scale models succeed in representing the flow conditions on the weir when the model upstream head is higher than 60 mm, and succeed in predicting the weir discharge capacity when the model upstream head is higher than 30 mm. [less ▲]

Detailed reference viewed: 62 (1 ULg)
Full Text
Peer Reviewed
See detailSeismic performances of modern unreinforced thermal insulation clay blocks masonry houses
Degée, Hervé ULg; Mordant, Christophe ULg; Candeias, Paulo et al

in Cunha, A; Caetano, E; Ribeiro, P (Eds.) et al Proceedings of the 9th International Conference on Structural Dynamics, EURODYN 2014 (2014)

In the scope of the transnational access activities of the European research project SERIES, the Laboratório Nacional de Engenharia Civil (LNEC) has provided access to its 3D shaking table to the ... [more ▼]

In the scope of the transnational access activities of the European research project SERIES, the Laboratório Nacional de Engenharia Civil (LNEC) has provided access to its 3D shaking table to the international construction company Wienerberger AG and to a group of European experts, in order to perform full-scale seismic tests on an industrial solution for buildings using a modern unreinforced thermal insulation clay block masonry structure. Such solution represents a very common construction method in Central Europe but, although some cyclic shear test results are available, its effective dynamic response under seismic events still requires experimental validation. For this purpose, two full-scale mock-ups with different geometries were tested on the 3-D shaking table using a series of seismic records with increasing intensity. The first mock-up is plan-regular, while the second one is designed so as to trigger some torsional effects. This paper summarizes the most relevant experimental results regarding the structural response of the specimens, e.g., the dynamic response evolution, the collapse mechanism identified and the maximum drift values measured. It also focuses on two different easy modelling strategies, i.e. simple model according to a combined Eurocode 6/Eurocode 8 approach and equivalent frame approach. It finally compares the predictions obtained from these two methods with the experimental results. [less ▲]

Detailed reference viewed: 17 (2 ULg)
Full Text
Peer Reviewed
See detailPerturbation methods for the determination of the statistical response of nonlinear Volterra systems
Denoël, Vincent ULg; Carassale, Luigi

in Proceedings of the Eurodyn 2014 Conference (2014)

The point-like quasi-steady aerodynamic loading in a turbulent flow is formally expressed as a function of the squared relative velocity between the fluid and the investigated structure. The three major ... [more ▼]

The point-like quasi-steady aerodynamic loading in a turbulent flow is formally expressed as a function of the squared relative velocity between the fluid and the investigated structure. The three major terms governing the low-order statistics of the response are known to be related to the average loading, the linear turbulent loading and the aerodynamic damping. The three other terms in the loading, namely the quadratic turbulence term, the parametric velocity feedback term and the squared velocity term, may significantly affect the higher order statistical cumulants of the response. These latter two sources of fluid-structure interaction are usually disregarded, by lack of efficient simulation tools, except a Monte Carlo simulation of the nonlinear equation. In this paper, we provide a formal analysis of the complete nonlinear model, including thus all six terms, but mainly focusing on the importance of the two nonlinear coupling terms of the loading. Closed form solutions of the response are derived for a second-order Volterra model of this problem, under the assumption of different timescales in the loading and in the structural behavior. Two major outcomes of the analysis are, on the one hand, that the squared structural velocity term has no influence on the cumulants of the response up to order 4 and, on the other hand, that the parametric velocity feedback acts as a reduction of the non Gaussianity of the response. [less ▲]

Detailed reference viewed: 25 (0 ULg)
Full Text
Peer Reviewed
See detailLe financement rural du Niger : élément clé du développement
Andres, Ludovic ULg; Lebailly, Philippe ULg

in Brot, Jean (Ed.) Les Cahiers de l'Association Tiers-Monde n° 29-2014 : XXIXes Journées sur le Développement "Economie informelle et développement : emploi, financement et régulations dans un contexte de crise" (2014)

Ce document décrit les possibilités de financement du milieu rural (collectivités et ménages). L'analyse de l'offre a établi une typologie des financements en fonction des acteurs (public, privé formel et ... [more ▼]

Ce document décrit les possibilités de financement du milieu rural (collectivités et ménages). L'analyse de l'offre a établi une typologie des financements en fonction des acteurs (public, privé formel et informel). Elle discerne l'ensemble des possibilités de financement des ménages ruraux. La présente étude a été établie à partir d'interviews avec les acteurs clés du secteur, d'observations lors de mission sur le terrain et de données secondaires provenant de la BCEAO, des acteurs publics en matière de développement rural ainsi que d'une revue de littérature sur le financement rural, les Systèmes Financiers Décentralisés et la microfinance en Afrique de l'Ouest. [less ▲]

Detailed reference viewed: 71 (10 ULg)
Full Text
Peer Reviewed
See detailPETRA: Multivariate analyses for neuroimaging data
Segovia-Román, Fermín ULg; Álvarez Illán, Ignacio; Salas-Gonzalez, Diego et al

in Proceeding of 2nd International Work-Conference on Bioinformatics and Biomedical Engineering (2014)

In last years, many research efforts in neurosciences have focused in multivariate approaches based on machine learning as an al- ternative to the use of Statistical Parametric Mapping and the univariate ... [more ▼]

In last years, many research efforts in neurosciences have focused in multivariate approaches based on machine learning as an al- ternative to the use of Statistical Parametric Mapping and the univariate analyses that it provides. However, this relatively new field still lacks of a software framework that completely meets the needs of the scientific community. In this work we present a toolbox designed to facilitate the access to the recent advances in neuroimaging data analysis based on multivariate approaches. The toolbox, written on Matlab, is freely avail- able and implements a Graphical User Interface that allows managing neuroimaging data in an easy way. [less ▲]

Detailed reference viewed: 38 (7 ULg)
Full Text
Peer Reviewed
See detailLe fonti liturgiche di Peire d’Alvernhe, 'Deus, vera vida, verays' (BdT 323,16)
Valenti, Gianluca ULg

in Los que fan viure e treslusir l’occitan. Actes du Xème Congrès de l’Association Internationale d’Etudes Occitanes (Béziers, CIRDOC, 12-19/06/2011) (2014)

Detailed reference viewed: 7 (0 ULg)
Full Text
Peer Reviewed
See detailAn implementation of the generalized Maxwell viscoelastic constitutive model
Careglio, Claudio; Canales Cardenas, Cristian ULg; Papeleux, Luc ULg et al

in Bertolino, Graciela; Cantero, Mariano; Storti, Mario (Eds.) et al Mecánica Computacional Vol XXXIII (2014)

Viscoelastic problems deserve great interest in Computational Mechanics literature. In the last years different approaches have been proposed in order to model viscoelastic problems, as in the case of the ... [more ▼]

Viscoelastic problems deserve great interest in Computational Mechanics literature. In the last years different approaches have been proposed in order to model viscoelastic problems, as in the case of the generalized Maxwell model and its numerical implementation. In particular Kaliske and Rothert (M. Kaliske and H. Rothert, Comput. Mech., 19(3): 228-239 (1997)) discussed basic reological models and the formulation of a generalized Maxwell model and the corresponding implementation of three dimensional viscoelastic model both for small and large strain cases. The numerical implementation addressed by Kaliske and Rothert is quite simple for small strain case and can be extended to a large strain format amenable to be included in finite element codes SOGDE and Metafor. The implementation of the discussed model in a 1D constitutive model, written in Matlab, is addressed. The well known relaxation and creep tests are simulated and compared with analytical results. Furthermore, the influence of constitutive parameters on the viscoelastic response is discussed. In addition, the model is implemented in Finite Element codes and the obtained results are compared with the 1D ones. [less ▲]

Detailed reference viewed: 48 (12 ULg)
Full Text
See detailRéalisation d’un inventaire typologique et dendrochronologique des charpentes anciennes en région Bruxelles-Capitale
Weitz, Armelle ULg; Charruadas, Paulo ULg; Crémer, Sarah et al

in Chronique, Archaeologia Mediaevalis 37, Namur, 13-14 mars 2014 (2014)

Detailed reference viewed: 26 (9 ULg)
Full Text
Peer Reviewed
See detailExperimental testing on modern clay masonry structures
Vasseur, Luc; Mordant, Christophe ULg; Degée, Hervé

in Proceedings of the Second European Conference on Earthquake Engineering and Seismology (2014)

Detailed reference viewed: 7 (0 ULg)
Full Text
Peer Reviewed
See detailLes copies de la "Cène" de Léonard de Vinci
Fagnart, Laure ULg

in Mounier, Pascal; Nativel, Colette (Eds.) Copier et contrefaire à la Renaissance. Faux et usage de faux. Actes du colloque organisé par R.H.R. et la S.F.D.E.S. (2014)

Cette étude participe à une réflexion sur la notion de faux et de contrefaçon à la Renaissance, quand la copie d'une image n'est pas considérée comme un faux et que sa pratique même intervient dans la ... [more ▼]

Cette étude participe à une réflexion sur la notion de faux et de contrefaçon à la Renaissance, quand la copie d'une image n'est pas considérée comme un faux et que sa pratique même intervient dans la formation artistique. A cet égard, le cas des "copies" de la "Cène" de Léonard de Vinci s'avère éclairant : aucune des nombreuses reproductions anciennes de la peinture murale n'est considérée comme autographe, aucune ne reproduit exactement l'ensemble de la composition, toutes sortes de variations étant apportées par les artistes. Aussi, peut-on s'interroger sur le statut de ces reproductions infidèles qui interprètent la "Cène" plus qu'elles ne la copient. [less ▲]

Detailed reference viewed: 111 (12 ULg)
Full Text
Peer Reviewed
See detailBronze Age Domestic Architecture in Eastern Syria : Familiar, Social and Economic Implications
Mas, Juliette ULg

in Bieliński; Gawlikowski, M; Koliński, R (Eds.) et al Proceedings of the 8th International Congress on the Archaeology of the Ancient Near East, 30 April – 4 May 2012, University of Warsaw, Volume 1: Plenary Sessions, Township and Villages, High and Low – The Minor Arts for the Elite and for the Populace (2014)

This paper deals with a PhD project on domestic architecture and society on the Syrian Euphrates region and in the Jezirah during the Bronze Age. The large geographical and chronological framework allowed ... [more ▼]

This paper deals with a PhD project on domestic architecture and society on the Syrian Euphrates region and in the Jezirah during the Bronze Age. The large geographical and chronological framework allowed to collect an important corpus of houses. The analysis of statistical data on their different features allowed interpretations, in particular concerning their functionnal characteristics. The attention is here focused on the crafts and industrial production of the house inhabitants. The contemporary economic system is well known in Southern Mesopotamia, and was there mainly based on official oikoi linked to the temples or to the palace. On the contrary, the analysis of Northern Mesopotamian evidence shows that the economic system in this area was mainly based on private households, the state control probably being there of lesser importance. [less ▲]

Detailed reference viewed: 61 (17 ULg)
Full Text
See detailThe harmonic balance method for advanced analysis and design of nonlinear mechanical systems
Detroux, Thibaut ULg; Renson, Ludovic ULg; Kerschen, Gaëtan ULg

in Proceedings of the SEM IMAC XXXII (2014)

As a tool for analyzing nonlinear large-scale structures, the harmonic balance (HB) method has recently received increasing attention in the structural dynamics community. However, its use was so far ... [more ▼]

As a tool for analyzing nonlinear large-scale structures, the harmonic balance (HB) method has recently received increasing attention in the structural dynamics community. However, its use was so far limited to the approximation and study of periodic solutions, and other methods as the shooting and orthogonal collocation techniques were usually preferred to further analyze these solutions and to study their bifurcations. This is why the present paper intends to demonstrate how one can take advantage of the HB method as an efficient alternative to the cited techniques. Two different applications are studied, namely the normal modes of a spacecraft and the optimization of the design of a vibration absorber. The interesting filtering feature of the HB method and the implementation of an efficient bifurcation tracking extension are illustrated. [less ▲]

Detailed reference viewed: 184 (39 ULg)
Full Text
Peer Reviewed
See detailAn analytical approach for Piano Key weir hydraulic design
Machiels, Olivier; Dewals, Benjamin ULg; Archambeau, Pierre ULg et al

in Erpicum, Sébastien; Laugier, Frédéric; Pfister, Michael (Eds.) et al Labyrinth and Piano Key weirs II - PKW 2013 (2014)

A hydraulic design equation for Piano Key Weirs is set up using the results of a large experimental parametric study. Comparison of the analytical formulation with experi-mental data from various physical ... [more ▼]

A hydraulic design equation for Piano Key Weirs is set up using the results of a large experimental parametric study. Comparison of the analytical formulation with experi-mental data from various physical modeling studies, considering idealized as well as real projects Piano Key Weirs configurations, shows a 15% accuracy in unit discharge prediction on a large range of geometric parameters values. Comparison of the proposed formulation to two other recently proposed equations highlights the importance to consider such analytical approaches inside the range of parameter values for which they have been validated. [less ▲]

Detailed reference viewed: 44 (1 ULg)
Peer Reviewed
See detailEtat du droit belge avant la tempête Salduz
Jacobs, Ann ULg

in Jacobs, Ann; Fourment, Françoios (Eds.) La garde à vue. Regards croisés belges, français et européens (2014)

Etat de la législation belge en ce qui concerne l'assistance de l'avocat lors des premiers interrogatoires avant la jurisprudence et la la loi Salduz.

Detailed reference viewed: 30 (3 ULg)
See detailMathematical formulations of shallow water models with porosity for urban flood modeling
Bruwier, Martin ULg; Erpicum, Sébastien ULg; Archambeau, Pierre ULg et al

in ICHE 2014 : 11th International Conference on Hydroscience & Engineering (2014)

Detailed reference viewed: 37 (11 ULg)
Full Text
Peer Reviewed
See detailCompatibility of using TiO2 and the faecal near-infrared reflectance spectrometry for estimation of cattle intake
Vandermeulen, Sophie ULg; Decruyenaere, Virginie; Ramirez-Restrepo, Carlos Alberto et al

in Hopkins, A; Collins, RP; Fraser, MD (Eds.) et al EGF at 50: the future of European Grasslands. Proceedings of the 25th General Meeting of the European Grassland Federation, Aberystwyth, Wales, U.K., 7 - 11th September 2014 (2014)

Combining titanium dioxide (TiO2) as indigestible marker to faecal near-infrared reflectance spectrometry (F-NIRS) can be used to determine cattle feed intake and quality of ingested forage if F-NIRS ... [more ▼]

Combining titanium dioxide (TiO2) as indigestible marker to faecal near-infrared reflectance spectrometry (F-NIRS) can be used to determine cattle feed intake and quality of ingested forage if F-NIRS spectra are not modified by the marker. This study aimed at determining the compatibility of TiO2 with F-NIRS. Three dry cows were fed a standard hay-based diet for three weeks supplemented with a daily dose of 0.1 % (10g) TiO2 during the last two weeks of the experiment. Faeces samples were collected every day and analysed for TiO2 and F-NIRS. Results suggest that TiO2 did not interfere with F-NIRS analyses. The calculations of crude protein, NDF, ADL contents, as well as dry matter intake did not change over time with increasing TiO2 in the faeces (P > 0.05). Slight differences observed for other predicted parameters seemed to be independent from TiO2. The higher Mahalanobis distance (H) for chemical composition (H = 7.2) independent from TiO2 inclusion could indicate that faecal spectra did not correspond exactly to the prediction database. Although 0.1% incorporation of TiO2 seem not to interfere with F-NIRS measurements, caution must be taken with higher levels of TiO2 as nothing indicates that interference could not appear. [less ▲]

Detailed reference viewed: 58 (15 ULg)
Full Text
Peer Reviewed
See detailComment appréhender la complexité inhérente aux compétences ?
Georges, François ULg; Tardif, Jacques; Poumay, Marianne ULg

in Pédagogie universitaire: entre recherche et enseignement (2014)

Le portfolio est souvent présenté comme un outil idéal pour documenter le développement des compétences. Sa mise en œuvre confronte les différents acteurs de l’enseignement et de la formation à la ... [more ▼]

Le portfolio est souvent présenté comme un outil idéal pour documenter le développement des compétences. Sa mise en œuvre confronte les différents acteurs de l’enseignement et de la formation à la difficile question de la description de la preuve de compétence. Comment constituer une preuve? Quels éléments apporter pour démontrer le développement de la compétence ? Cet article aborde ces questions à travers des données empiriques, celles-ci permettant d’illustrer concrètement les notions abordées. [less ▲]

Detailed reference viewed: 249 (38 ULg)
Full Text
Peer Reviewed
See detailHippocrate dans un monde de chrétiens : la réception des traités hippocratiques dans la chôra égyptienne à la période byzantine (284-641)
Marganne, Marie-Hélène ULg

in Jouanna, Jacques; Zink, Michel (Eds.) Hippocrate et les hippocratismes : médecine, religion, société. Actes du XIVe Colloque International Hippocratique (2014)

Dans le cadre d'une recherche sur la réception des œuvres des auteurs de l’antiquité classique dans l’Égypte christianisée, on examine les témoignages papyrologiques de la période byzantine relatifs aux ... [more ▼]

Dans le cadre d'une recherche sur la réception des œuvres des auteurs de l’antiquité classique dans l’Égypte christianisée, on examine les témoignages papyrologiques de la période byzantine relatifs aux traités hippocratiques, leur texte, leur mise en texte et leur contexte, en vue, non seulement de définir leur spécificité par rapport aux autres papyrus grecs médicaux et aux papyrus iatro-magiques de la même époque, mais aussi d’y déceler des traces éventuelles de copie ou d’utilisation en contexte chrétien. [less ▲]

Detailed reference viewed: 50 (18 ULg)
Full Text
See detailGeneralization of Den Hartog's Equal-Peak Method for nonlinear primary systems
Habib, Giuseppe ULg; Detroux, Thibaut ULg; Kerschen, Gaëtan ULg

in Proceedings of the International Conference on Structural Nonlinear Dynamics and Diagnosis (2014)

This study addresses the mitigation of one problem nonlinear resonance of a mechanical system. In view of the narrow bandwidth of the classical linear tuned vibration absorber, a new nonlinear absorber ... [more ▼]

This study addresses the mitigation of one problem nonlinear resonance of a mechanical system. In view of the narrow bandwidth of the classical linear tuned vibration absorber, a new nonlinear absorber, termed the nonlinear tuned vibration absorber (NLTVA), is introduced in this paper. One unconventional aspect of the NLTVA is that the mathematical form of its restoring force is tailored according to the nonlinear restoring force of the primary system. The NLTVA parameters are then determined using a nonlinear generalization of Den Hartog's equal-peak method. The mitigation of the resonant vibrations of a Duffing oscillator is considered to illustrate the proposed developments. [less ▲]

Detailed reference viewed: 93 (17 ULg)
See detailValidation of an UAV finite element model using operational data
Mezzapesa, A.S.; Arras, M.; Grappasonni, Chiara ULg et al

in Proceedings of 55th AIAA/ASMe/ASCE/AHS/SC Structures, Structural Dynamics, and Materials Conference (2014)

Detailed reference viewed: 18 (2 ULg)
Full Text
Peer Reviewed
See detailContinuités et variations entre le Néolithique final et le Bronze ancien en moyenne vallée du Rhône. L’apport de l'occupation structurée et stratifiée de Savasse (Drôme)
Moreau, C.; Linton, Jimmy ULg; Affolter, Jehanne

in Sénépart, I.; Léandri, F.; Cauliez, J. (Eds.) et al Chronologie de la Préhistoire récente dans le Sud de la France - Acquis 1992-2012 - Actualité de la recherche : Actes des 10e rencontres méridionales de Préhistoire récente (2014)

Detailed reference viewed: 13 (2 ULg)
Full Text
Peer Reviewed
See detailLes TICE dans les approches interculturelles en classe de FLE/S : Leviers ou obstacles dans l’apprentissage de l’écrit ? Pratiques déclarées et représentations d’enseignants de FLE/S en contexte universitaire
Dezutter, Olivier; Bleys, Françoise; Eid, Rodine et al

in EID, Cynthia; FADEL, Fady (Eds.) Les interculturalités, État des lieux et perspectives, théories et pratiques (2014)

Detailed reference viewed: 116 (5 ULg)
Full Text
See detailRobust optimal rendezvous using differential drag
Dell'Elce, Lamberto ULg; Martinusi, Vladimir ULg; Kerschen, Gaëtan ULg

in Proceedings of the AIAA/AAS Astrodynamics Specialist Conference (2014)

The practical realization of the differential drag technique for orbital relative maneuvers must cope with the several and severe uncertainty sources affecting drag modeling. Neglecting these ... [more ▼]

The practical realization of the differential drag technique for orbital relative maneuvers must cope with the several and severe uncertainty sources affecting drag modeling. Neglecting these uncertainties might yield to oversimplified solutions whose representation of a real-life scenario is questionable. The first outcome of this study consists in the synthesis of a robust optimal controller which combines differential flatness theory and the scenario approach to generate a reference path which can be easily followed. The second outcome is the characterization of the relevant uncertainties of the differential drag problem, with a special focus on the aerodynamic force. The developments are validated in a highly detailed simulation environment including, among the perturbations, advanced drag modeling and coupled attitude and orbital dynamics. [less ▲]

Detailed reference viewed: 14 (5 ULg)
Full Text
Peer Reviewed
See detailApprentissage par renforcement batch fondé sur la reconstruction de trajectoires artificielles
Fonteneau, Raphaël ULg; Murphy, Susan A.; Wehenkel, Louis ULg et al

in Proceedings of the 9èmes Journées Francophones de Planification, Décision et Apprentissage (JFPDA 2014) (2014)

Cet article se situe dans le cadre de l’apprentissage par renforcement en mode batch, dont le problème central est d’apprendre, à partir d’un ensemble de trajectoires, une politique de décision optimisant ... [more ▼]

Cet article se situe dans le cadre de l’apprentissage par renforcement en mode batch, dont le problème central est d’apprendre, à partir d’un ensemble de trajectoires, une politique de décision optimisant un critère donné. On considère plus spécifiquement les problèmes pour lesquels l’espace d’état est continu, problèmes pour lesquels les schémas de résolution classiques se fondent sur l’utilisation d’approxima- teurs de fonctions. Cet article propose une alternative fondée sur la reconstruction de “trajectoires arti- ficielles” permettant d’aborder sous un angle nouveau les problèmes classiques de l’apprentissage par renforcement batch. [less ▲]

Detailed reference viewed: 56 (5 ULg)
Full Text
Peer Reviewed
See detailExperimental arguments concerning a hydraulic connection layer during limestone convective drying
Prime, Noémie ULg; Housni, Z.; Fraikin, Laurent ULg et al

in Proceedings of the 6th International Conference on Unsaturated Soils, UNSAT 2014 (2014)

Detailed reference viewed: 16 (2 ULg)
Full Text
See detailSaisir l’évaluation de l’université en actes : interprétations et appropriations des parties prenantes.
Charlier, Nathan ULg; Vangeebergen, Thomas ULg

in Fallon, Catherine; Leclercq, Bruno (Eds.) Leurres de la qualité dans l’enseignement supérieur. Variations internationales sur un thème ambigu (2014)

Detailed reference viewed: 56 (30 ULg)
Full Text
See detailDevonian to Basal Permian Lithostratigraphy in Southwestern Hakkari: A Perspective from Northern Arabian Mixed Carbonate–Siliciclastic Platform
Hosgör, Izzet; Yilmaz, Ismail Omer; Gourvennec, Remy et al

in AAPG International Conference & Exhibition Istanbul 2014 (2014)

Detailed reference viewed: 15 (1 ULg)
Full Text
Peer Reviewed
See detailPET imaging analysis using a parcelation approach and multiple kernel classification
Segovia-Román, Fermín ULg; Phillips, Christophe ULg

in International Workshop on Pattern Recognition in Neuroimaging, Tübingen 4-6 June 2014 (2014)

Positron Emission Tomography (PET) is a non-invasive medical imaging modality that provides information about physiological processes. Due to its ability to measure the brain metabolism, it is widely used ... [more ▼]

Positron Emission Tomography (PET) is a non-invasive medical imaging modality that provides information about physiological processes. Due to its ability to measure the brain metabolism, it is widely used to assist the diagnosis of neurodegenerative disorders such as Alzheimer’s disease (AD) of Parkinsonism. In order to avoid the subjectivity inherent to the visual exploration of the images, several computer systems to analyze PET data were developed during the last years. However, dealing with the huge amount of information provided by PET imaging is still a challenge. In this work we present a novel methodology to analyze PET data that improves the automatic differentiation between controls and AD patients. First the images are divided into small regions or parcels, defined either anatomically, geometrically or randomly. Secondly, the accuray of each single region is estimated using a Support Vector Machine (SVM) classifier and a cross-validation approach. Finally, all the regions are assessed together using multiple kernel SVM with a kernel per region. The classifier is built so that the most discriminative regions have more weight in the final decision. This method was evaluated using a PET dataset that contained images from healthy controls and AD patients. The classification results obtained with the proposed approach outperformed two recently reported computer systems based on Principal Component Analysis and Independent Component Analysis. [less ▲]

Detailed reference viewed: 36 (4 ULg)
Full Text
Peer Reviewed
See detailOrganic food between consumers' interest and indifference
Petrescu, Dacinia Crina; Burny, Philippe ULg; Dragan, Alina Aida et al

in Academia Comercială" din Satu Mare (Ed.) CONFERINȚA INTERNAŢIONALĂ "DEZVOLTARE DURABILĂ ÎN CONDIȚII DE INSTABILITATE ECONOMICĂ", Ediția a treia (2014)

The purpose of this paper was to identify several of consumers’ perceptions, beliefs and actions related to organic food and also possible differences between groups of consumers. The studied variables ... [more ▼]

The purpose of this paper was to identify several of consumers’ perceptions, beliefs and actions related to organic food and also possible differences between groups of consumers. The studied variables were: interest or indifference in eating organic vs conventional food, food label information reading behaviour, perceived healthiness degree of organic food, perceived seriousness of the preference for organic food. The study revealed: an average concern for the food type (organic vs conventional: 57% of the sample declare they care what kind of food they eat); a high interest in label information (76% declared they read the food label in at least 26% of the cases when they buy food); dominant perception of organic food as a healthier option than conventional food (by 95% of the tested consumers) and as opposite to a fad (by 62% of the subjects); a statistically significant difference between men and women in terms of their appreciations (perceptions) of organic food as being healthier than conventional food (p=.036); a statistically significant difference between people who cared if they ate organic vs conventional food and those who didn’t care in the levels of label reading frequency (p=.000). [less ▲]

Detailed reference viewed: 23 (1 ULg)
Full Text
Peer Reviewed
See detailDetection of near-field, low permittivity layers with Ground Penetrating Radar: analytical estimation of the reflection coefficient
Van der Wielen, Audrey; Courard, Luc ULg; Nguyen, Frédéric ULg

in LAMBOT, Sébastien (Ed.) Proceedings of 15th International Conference on ground Penetrating Radar (2014)

The reflection coefficient of GPR waves encountering embedded thin layers is commonly estimated using a plane wave, far field approximation. But when the thin layer is situated in the near field of the ... [more ▼]

The reflection coefficient of GPR waves encountering embedded thin layers is commonly estimated using a plane wave, far field approximation. But when the thin layer is situated in the near field of the antenna, the spherical nature of the waves and the possible propagation of a lateral wave into the layer may have a strong influence on the measured reflected amplitude. In this work, we studied through 2D FDTD simulations the behavior of a radar wave interacting with thin layers of different thicknesses. The snapshots and radargrams showed a large influence of the layer thickness on the wave propagation. For the very thin layers, the evanescent wave plays a major role and the plane wave approximation gives a good estimation of the reflection coefficient. For thicker layers, the specific inclination of each multiple reflection has to be taken into account, as well as the lateral wave propagation. On the basis of these observations, we determined which analytical method should be used for the analytical prediction of the reflection coefficient, as a function of the layer thickness. [less ▲]

Detailed reference viewed: 20 (0 ULg)
Full Text
See detailStratigraphy and depositionnal settings of the Late Famennian of Southern Belgium - a snapshot of the palaeoenvironment for late Devonian tetrapods and arthropods
Denayer, Julien ULg; Prestianni, Cyrille; Olive, Sébastien et al

in 4th International Palaeontological Congress, Mendoza, Abstracts volume (2014)

Detailed reference viewed: 12 (1 ULg)
Full Text
Peer Reviewed
See detailComparative analysis of the energy dissipation on a stepped spillway downstream of a Piano Key Weir
Silvestri, Aurélien ULg; Archambeau, Pierre ULg; Pirotton, Michel ULg et al

in Erpicum, Sébastien; Laugier, Frédéric; Pfister, Michael (Eds.) et al Labyrinth and Piano Key Weirs II - PKW 2013 (2014)

A systematic experimental study has been carried out to compare the residual energy at the toe of a stepped spillway of varied length considering a classical ogee-crested weir (OCW) or two different piano ... [more ▼]

A systematic experimental study has been carried out to compare the residual energy at the toe of a stepped spillway of varied length considering a classical ogee-crested weir (OCW) or two different piano key weirs (PKW) at the top of the structure. Four spillway lengths have been considered on a wide range of discharge. An indirect method has been used to compute the residual flow energy at the spillway toe from water depth measurements in a horizontal channel downstream. The results indicate that uniform flow conditions, i.e. flow energy at the spillway toe independent of the spillway length, are reached on significantly shorter spillways downstream of a PKW than downstream of an OCW. However, the uniform flow energy at constant discharge on the spillway is found to vary depending on the weir type. In particular, it is smaller downstream of the OCW than downstream of the PKWs. [less ▲]

Detailed reference viewed: 54 (4 ULg)
Full Text
Peer Reviewed
See detailShake table tests on unreinforced load-bearing masonry sub-structures
Mordant, Christophe ULg; Degée, Hervé

in Proceedings of the Second European Conference on Earthquake Engineering and Seismology (2014)

The field of application of unreinforced load-bearing masonry has been widely extended in the past two decades thanks to a better understanding of the structural behaviour and a better control of ... [more ▼]

The field of application of unreinforced load-bearing masonry has been widely extended in the past two decades thanks to a better understanding of the structural behaviour and a better control of production methods, leading to improvements of their design and a more rational use of the material. Multi-storey apartment buildings and lightweight concrete houses are now widespread. Nevertheless, this structural solution is still questionable in seismic areas, even for low-to-moderate activity, and requires additional investigations to properly understand the structural behaviour under these specific horizontal dynamic actions. Moreover, these new applications are associated to new requirements, like the individual comfort or the low energy-consumption, achieved by resorting to technical solutions that are likely to influence on the dynamic response of the structure. In this context, experimental shake table tests have been performed on unreinforced loadbearing clay masonry sub-structures. In this paper, the main observations derived from the direct experimental measurements are summarized and followed by resulting preliminary conclusions. A major observation is a significant rocking behaviour for the tests with the highest seismic input, strongly influenced by the presence of rubber devices and the frame effect. Dynamic characterization of the tested specimens (natural frequencies and modal shapes) is also detailed. [less ▲]

Detailed reference viewed: 15 (3 ULg)
Full Text
Peer Reviewed
See detailL'art de la guigne en 1862. Contexte, intertexte et sous-texte du Guignon de Mallarmé
Durand, Pascal ULg

in Brissette, Pascal; Luneau, Marie-Pier (Eds.) Deux siècles de malédiction littéraire (2014)

Deuxième texte en vers publié par Mallarmé, dans la revue L'Artiste, alors dirigée par Arsène Houssaye, qui n’en retint que les cinq premiers tercets, Le Guignon place l’entrée de son auteur dans le champ ... [more ▼]

Deuxième texte en vers publié par Mallarmé, dans la revue L'Artiste, alors dirigée par Arsène Houssaye, qui n’en retint que les cinq premiers tercets, Le Guignon place l’entrée de son auteur dans le champ poétique sous le signe d’une malédiction d’aspect très convenu, tant y paraît bien saturé l’appareil des clichés assimilant élection poétique et ratage social. La banalité du propos, gage donné aux pairs d’une adhésion fervente aux normes à quoi la plupart d’entre eux se rangent au milieu du Second Empire, y prend cependant une tournure assez singulière, témoignant d’un jeu avec les codes autant que d’une soumission à ceux-ci. Ce jeu passe par un complexe montage intertextuel articulant, au registre de la malédiction poétique, les apports d’un Nerval, d’un Gautier, d’un Baudelaire et d’un Cladel ; il passe aussi par une tonalité grotesque et paroxystique, reflet d’une distance prise à l’égard de l’imaginaire collectif ainsi synthétisé et d’une extériorisation critique de structures littéraires puissamment incorporées, au prix d’un point de vue tout ensemble interne et externe pris sur ces structures. Texte fondamentalement trivial — à tous les sens du terme —, Le Guignon tient ainsi, à la fois, de la récitation d’un credo et d’une sorte de physiologie des poètes post-romantiques. [less ▲]

Detailed reference viewed: 145 (52 ULg)
Full Text
Peer Reviewed
See detailEarly Jezirah 3b Pottery from Tell Beydar, Selected Inventories from latest excavation campaigns
Mas, Juliette ULg; Gavagnin, Katia

in Bieliński, P; Gawlikowski, M; Koliński, R (Eds.) et al Proceedings of the 8th International Congress on the Archaeology of the Ancient Near East, 30 April – 4 May 2012, University of Warsaw, Volume 2: Excavation and Progress Reports, Posters (2014)

Since 1992, excavations at Tell Beydar have offered the opportunity to explore an urban centre of the Upper Khabur region. The extensive exploration of the EJZ 3b levels gave us access to the urbanism and ... [more ▼]

Since 1992, excavations at Tell Beydar have offered the opportunity to explore an urban centre of the Upper Khabur region. The extensive exploration of the EJZ 3b levels gave us access to the urbanism and the architecture of the city as well as its material culture, especially the pottery. The assemblages presented in this paper were exclusively found directly on the floors of various buildings (of a public, domestic, religious, offi- cial nature) and inside a grave. Most of these inventories consist of complete vessels discovered either intact or smashed but restorable. The aim of this paper is to investigate if, or to what extent, the intra-site distribution of the morphological repertoire of Beydar IIIb ceramic is related to its context of use. [less ▲]

Detailed reference viewed: 40 (13 ULg)
Full Text
See detailL’apport des méthodes de datation physique à la caractérisation et à la datation de matériaux de construction et de structures architecturales : un bilan et des perspectives
Guibert, Pierre; Bailiff, Ian; Baylé, Maylis et al

in », Actes du colloque L’Archéologie des Bâtiments en question – un outil pour les connaître, les conserver et les restaurer, ICOMOS (2014)

Detailed reference viewed: 16 (1 ULg)
Full Text
See detailAnalytic Propagation for Satellites in Near-Circular Low-Earth Orbits
Martinusi, Vladimir ULg; Dell'Elce, Lamberto ULg; Kerschen, Gaëtan ULg

in Proceedings of the AIAA/AAS Astrodynamics Specialist Conference (2014)

The present work is focused on providing an analytic model for the motion of an low-Earth-orbiting satellite. The model incorporates the two dominant perturbations, namely the atmospheric drag and the ... [more ▼]

The present work is focused on providing an analytic model for the motion of an low-Earth-orbiting satellite. The model incorporates the two dominant perturbations, namely the atmospheric drag and the Earth oblateness. While the latter is modeled by the second zonal harmonic J 2 , both constant and exponential density distribution models of the atmosphere are considered. The satellite orbit is assumed to be almost circular. Closed-form equations of motion are obtained, even time-explicit in the case of a constant atmosphere. The analytic predictions are carefully validated against direct numerical simulations. The resulting model is suitable to be incorporated in onboard propagators for short-term orbit predictions. [less ▲]

Detailed reference viewed: 19 (7 ULg)
Peer Reviewed
See detailExtended capabilities of the Liège Intra Nuclear Cascade Model
Boudard, A.; David, J.-C.; Leray, S. et al

in Proceedings of the 11th International Topical Meeting on Nuclear Applications of Accelerators (AccApp11) (2014)

Detailed reference viewed: 6 (2 ULg)
Peer Reviewed
See detailInfluence of liquid viscosity on separation efficiency of structured packings – modelling approach based on X-ray tomography investigations
Janzen, Anna; Steube, Julia; Crine, Michel ULg et al

in Proceedings (2014)

The objectives of this work are the investigation of liquid flow morphology inside a structured packing using X-ray tomography and the development of a modelling approach based on hydrodynamic analogy ... [more ▼]

The objectives of this work are the investigation of liquid flow morphology inside a structured packing using X-ray tomography and the development of a modelling approach based on hydrodynamic analogy between the real complex flow patterns and simplified fluid-dynamic elements. To study the influence of viscosity, water and mixtures of water and glycerine with varying glycerine fraction are used as working liquids. X-ray tomography is applied to determine the spatial distribution of liquid in the cross-section of a column filled with MellapakPlus 752.Y packing elements. The resulting images are used to evaluate liquid hold-up, gas-liquid interfacial area and to analyse liquid morphology. Liquid flow patterns (film flow, contact-point liquid, flooded regions) are identified, and the fraction of liquid within each flow pattern depending on flow rate and liquid viscosity is determined. The results of the liquid flow morphology analysis are used to develop a hydrodynamic analogy model. To implement the gas-liquid contact area and the flooded regions into this model, the packing is represented as a bundle of dry, filled and irrigated cylindrical channels, while the ratio between different type channels is determined from the analysis of tomographic images. This simplified hydrodynamic description allows a direct application of rigorous partial differential transport equations, and their solution yields local concentration fields which are used for the evaluation of the separation efficiency. The new modelling approach is validated by comparison with separation efficiency data obtained from experiments with CO2 desorption from saturated water-glycerine mixtures into air. The presented modelling approach is capable of predicting the influence of viscosity on separation efficiency of columns filled with structured packings. [less ▲]

Detailed reference viewed: 23 (0 ULg)
Peer Reviewed
See detailProduction of some particular isotopes in spallation targets calculated with INCL4.6- ABLA07 implemented into MCNPX
Leray, S.; Boudard, A.; Cugnon, Joseph ULg et al

in Proceedings of SNA + MC 2013 - Joint International Conference on Supercomputing in Nuclear Applications + Monte Carlo (2014)

Detailed reference viewed: 10 (1 ULg)
Full Text
Peer Reviewed
See detailDemisso capite : Ablatif absolu ou épithète détachée ?
Longrée, Dominique ULg

in Lehmann, Christian; Concepcion, Cabrillana L. (Eds.) Acta XIV Colloquii Internationalis Linguisticae Latinae (2014)

Detailed reference viewed: 48 (7 ULg)
Full Text
Peer Reviewed
See detailA Fast Newton-Raphson Method in Stochastic Linearization
Canor, Thomas ULg; Blaise, Nicolas ULg; Denoël, Vincent ULg

in Proceedings of the Ninth International Conference on Structural Dynamics (2014)

Owing to its accessible implementation and rapidity, the equivalent linearization has become a common probabilistic approach for the analysis of large-dimension nonlinear structures, as encountered in ... [more ▼]

Owing to its accessible implementation and rapidity, the equivalent linearization has become a common probabilistic approach for the analysis of large-dimension nonlinear structures, as encountered in earthquake and wind engineering. It consists in replacing the nonlinear system by an equivalent linear one, by tuning the parameters of the equivalent system, in order to minimize some discrepancy error. Consequently classical analysis tools such as the spectral analysis may be reconditioned to approximate the solution of structures with slight to moderate nonlinearities. The tuning of the equivalent parameters requires the solution of a set of nonlinear algebraic equations involving integrals. It is typically performed with the fixed-point algorithm, which is known to behave poorly in terms of convergence. We therefore advocate for the use and implementation of a Newton-Raphson approach, which behaves much better, even in its dishonest formulation. Unfortunately, this latter option requires the costly construction of a Jacobian matrix. In the approach described in this paper, this issue is answered by introducing a series expansion method that provides a fast and accurate estimation of the residual function (whose solution provides the equivalent parameters) and a fast and approximate estimation of the Jacobian matrix. An illustration demonstrate the good accuracy obtained with the proposed method. [less ▲]

Detailed reference viewed: 52 (6 ULg)
Full Text
Peer Reviewed
See detailDating Metallic Reinforcements in Roof Frames
Maggi, Christophe; Pagès, Gaspard; Hoffsummer, Patrick ULg et al

in Bolle, Caroline; Coura, Geneviève; Léotard, Jean-Marc (Eds.) L'archéologie des bâtiments en question. Un outil pour les connaître, les conserver et les restaurer (2014)

Detailed reference viewed: 26 (5 ULg)
Full Text
See detail"L’Alfier nero" (Le Fou noir) d’Arrigo Boito. Lecture anthropologique et poétologique d’un combat d’échecs.
Leyh, Valérie ULg

in Küpper, Achim; Vanden Berghe, Kristine (Eds.) Guerre et jeu. Cultures d’un paradoxe à l’ère moderne (2014)

Detailed reference viewed: 48 (4 ULg)
Full Text
Peer Reviewed
See detailExperts’ opinions concerning the minimum content of a national household travel survey
Cools, Mario ULg; Armoogum, Jimmy; Diana, Marco

in Proceedings of the 10th International Conference on Transport Survey Methods (2014)

Although an extensive literature is available concerning the design of travel surveys, fewer research initiatives have been carried out to determine the content of the survey itself. The objective of the ... [more ▼]

Although an extensive literature is available concerning the design of travel surveys, fewer research initiatives have been carried out to determine the content of the survey itself. The objective of the present work is to identify such minimum set through a survey (MTSQ – Mini-Travel Survey Questionnaire) targeted to experts in this field. Moreover, it is investigated whether unanimity exists in the experts’ opinions concerning the importance of various types of questions and whether regional and/or professional differences exist. The MTSQ survey was successfully completed by 81 respondents in October-November 2012, mainly from Europe and North America. The study identified the most important questions, which should form the core of any NHTS. This list is especially useful for countries which do not yet have implemented a NHTS, and for defining the set of questions in case a harmonized household travel survey spanning across different countries will be initialized. Secondly, the paper investigated whether unanimity exists in the experts’ opinions. Our analyses clearly pinpointed different evaluations according to the experts’ characteristics, thus it could be concluded that unanimity is certainly not complete. Thus, whenever developing standards for travel surveys these differences should be taken into account, according to both the prospective data users the intended data usages. Especially the differences with respect to the regional context (North-American versus European), and involvement with the NHTS should be acknowledged. [less ▲]

Detailed reference viewed: 20 (1 ULg)
Full Text
Peer Reviewed
See detailInformatiser le Französisches Etymologisches Wörterbuch: la nécessaire prise en compte de l'utilisateur
Renders, Pascale ULg; Baiwir, Esther ULg

in Abel, Andrea; Vettori, Chiara; Ralli, Natascia (Eds.) Proceedings of the XVI EURALEX International Congress: The User in Focus, 15-19 juillet 2014 (2014)

Detailed reference viewed: 25 (2 ULg)
Full Text
Peer Reviewed
See detailImpact de l’érosion littorale sur les migrations forcées. Cas de Cotonou, Bénin.
Ozer, Pierre ULg; Hountondji, Yvon-Carmen; Bessan, Modestine Victoire et al

in Ozer, André; Ozer, Pierre (Eds.) Colloque International "La Géographie Physique et les Risques Naturels" - Livre de résumés (2014)

En utilisant la fonction multi dates disponible dans Google Earth, cet article estime la superficie érodée à Cotonou entre 2002 et 2011 à l’est de l’exutoire du Lac Nokoué. En outre, il évalue le nombre ... [more ▼]

En utilisant la fonction multi dates disponible dans Google Earth, cet article estime la superficie érodée à Cotonou entre 2002 et 2011 à l’est de l’exutoire du Lac Nokoué. En outre, il évalue le nombre de maisons détruites ainsi que le nombre de personnes contraintes à une migration forcée. Les figures sont importantes puisque de l’ordre de cent mètres de zone côtière ont totalement disparu en une décennie sur un tronçon de près de six kilomètres de long en pleine ville ou en proche périphérie. [less ▲]

Detailed reference viewed: 31 (2 ULg)
Peer Reviewed
See detailLe "basileion", les reines et Actium
Veymiers, Richard ULg

in Bricault, Laurent; Versluys, Miguel John (Eds.) Power, Politics and the Cults of Isis. Proceedings of the Vth International Conference of Isis Studies, Boulogne-sur-Mer, October 13-15 2011 (2014)

Detailed reference viewed: 72 (5 ULg)
Full Text
Peer Reviewed
See detailRégner en mode épistolaire : l’exemple de Charles VIII
Dumont, Jonathan ULg; Marchandisse, Alain ULg

in Dumézil, Bruno; Vissière, Laurent (Eds.) Épistolaire politique I. Gouverner par les lettres (2014)

Detailed reference viewed: 32 (4 ULg)
Full Text
Peer Reviewed
See detailAssessing the quality of Experimental Data with Gaussian Processes: Example with an Injection Scroll Compressor
Quoilin, Sylvain ULg; Schrouff, Jessica ULg

in Proceedings of the 2014 Purdue Conferences (2014)

This paper describes an experimental study carried out on a refrigeration scroll compressor with and without vapour injection. The test rig designed for that purposed allows evaluating the performance ... [more ▼]

This paper describes an experimental study carried out on a refrigeration scroll compressor with and without vapour injection. The test rig designed for that purposed allows evaluating the performance over a wide range of operating conditions, by varying the supply pressure, the injection pressure, the discharge pressure, the supply superheating and the injection superheating. 97 Steady-state points are measured, with a maximum isentropic efficiency of 64.1% and a maximum consumed electrical power of 13.1 kW. A critical analysis of the experimental results is then carried out to evaluate the quality of the data using a machine learning method. This method based on Gaussian Processes regression, is used to build a statistical operating map of the compressor as a function of the different inputs. This statistical operating map can then be compared to the experimental data points to evaluate their accuracy. [less ▲]

Detailed reference viewed: 45 (11 ULg)
Full Text
Peer Reviewed
See detailExperimental Study of the Human Ability to Deliberately Excite a Flexible Floor
Schwartz, Cédric ULg; Berger, Alexis; Bruls, Olivier ULg et al

in Zingoni, Alphose (Ed.) Proceedings of the 5th International Conference on Structural Engineering, Mechanics and Computation (2014)

Human-structure interactions are not completely understood yet. This paper presents an experimental study focusing on the interaction between a human and a flexible support, with a major aim to better ... [more ▼]

Human-structure interactions are not completely understood yet. This paper presents an experimental study focusing on the interaction between a human and a flexible support, with a major aim to better understand how the behavior of a human subject, bouncing on a flexible structure, adapts to the support motion. Exploratory experiments are undertaken with a 7m-span timber footbridge tested in the Human Motion Analysis Laboratory of the University of Liege. The movements of the coupled system composed of the subject and the footbridge are recorded by Motion Capture technology; the subject\textquoteright{}s 3-D body motion is defined by three important angles: ankle, knee and hip. The interaction between the subject and the footbridge is also quantified by means of force platform measurements. The experiments indicate an influence of the support amplitude and natural frequency on the phase shift between the oscillatory floor motion and the three angles characterizing the motion. [less ▲]

Detailed reference viewed: 50 (14 ULg)
Full Text
Peer Reviewed
See detailAn agent-based micro-simulation framework to assess the impact of river floods on transportation systems: implementation trajectory for an assessment in the Brussels metropolitan area
Saadi, Ismaïl ULg; Eftekhar, Hamed ULg; Mustafa, Ahmed et al

in Proceedings of the 2nd International Conference for Traffic and Transport Engineering (ICTTE) Belgrade 2014 (2014)

Several studies were made to assess the direct damage but few studies tackled the topic related to the assessment of indirect damage. This paper discusses the development of a large scale agent-based ... [more ▼]

Several studies were made to assess the direct damage but few studies tackled the topic related to the assessment of indirect damage. This paper discusses the development of a large scale agent-based micro-simulation framework to assess the economic damage caused by river floods. The advantage of this approach is that the economic loss can be assessed at individual level. For that purpose, relationship is established between costs and trips cancelation/duration growth. As the numerical simulations depend largely on the initial demand, the accuracy of the data is fundamental. The model is based upon several disaggregated data related to mobility behaviour of the Belgian citizens. The study area covers the Brussels metropolitan area which was subjected to several floods in the past and may see the risk increasing in the coming decades. [less ▲]

Detailed reference viewed: 150 (69 ULg)