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See detailLes lieux hybrides dans la ville : essai de cartographie
Uyttebrouck, Constance ULg

Conference (2017, May 11)

Les « lieux hybrides », associant activités résidentielles et professionnelles dans un même espace, et dont le développement s’inscrit dans l’évolution de l’habitat et du monde du travail, nécessitent la ... [more ▼]

Les « lieux hybrides », associant activités résidentielles et professionnelles dans un même espace, et dont le développement s’inscrit dans l’évolution de l’habitat et du monde du travail, nécessitent la mise en place de dispositifs régulateurs, au regard des dynamiques de cohésion sociale et de développement urbain. Une production non régulée de tels lieux comporte des incertitudes liées à la mobilité, qui pourraient entraîner un nouveau mouvement d’urbanisation vers la périphérie. La mixité de fonctions qui les caractérise pourrait en outre fragiliser l’accès au logement dans des quartiers soumis à une forte pression immobilière. L’article met en évidence la possibilité de cartographier le parc actuel de lieux hybrides à l’échelle de la région bruxelloise, voire de la métropole, pour visualiser les dynamiques spatiales en jeux. L’objectif est ensuite de mener une étude comparative avec Amsterdam et Stockholm, afin de dégager les facteurs de convergence et de divergence liés à des dynamiques urbaines propres ou à des instruments de régulation spécifiques. Le caractère innovant, et parfois informel, du phénomène complexifie également l’établissement de la cartographie. [less ▲]

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See detailLa montée d'une agriculture urbaine en Belgique: nourrir les populations en investissant deux grandes villes: Bruxelles-Capitale et Liège
Bousbaine, Antonia ULg; bryant, christopher; Jonet, christian

Conference (2017, May 11)

The loss of farms is problematic in Belgium, particularly in Wallonia (68% loss between 1980 and 2015) and in the Brussels-Capital Region and access to land is a real challenge for farmers to deal when ... [more ▼]

The loss of farms is problematic in Belgium, particularly in Wallonia (68% loss between 1980 and 2015) and in the Brussels-Capital Region and access to land is a real challenge for farmers to deal when setting up their farms. Recently, however, there has been a real increase in awareness of the importance of agricultural activity and land on the part of public authorities and especially of citizens who are trying to regain control of their food. These citizens are looking for a healthier and safer food in the face of the shortage of agricultural land in a densely populated country. The smallest interstices of the cities are occupied to set up innovative agricultural projects such as in Brussels and Liège where vegetable gardens and a Food Land Belt is developing to feed the populations of the cities. These agri-urban projects are the work of the citizens themselves, who take the initiative themselves to realize these innovative actions by pooling their knowledge and tools centered on new agricultural production models. We highlight the actions taken by certain segments of the population in the cities of Brussels and Liège where food, social and environmental issues have become a concern for consumers who invest in the green spaces left vacant compared to what is being done in other countries such as Canada or France, for more than a decade. [less ▲]

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See detailAn easy route to synthesis black phosphorus at low pressure and soft conditions
Tiouitchi, Ghassane; Hamedoun, Mohammed; El Kenz, Abdallah et al

Conference (2017, May 11)

Black phosphorus a promising candidate for large application, due to his variety of structural and physical properties, can be prepared by a very low-coast reaction route with high purity and ... [more ▼]

Black phosphorus a promising candidate for large application, due to his variety of structural and physical properties, can be prepared by a very low-coast reaction route with high purity and crystallinity. Black phosphorus is prepared from red phosphorus at 873K under reduced pressure using a simple and low cost catalytic system. The quality of crystal with lattice parameters a=3.31Å, b=10.48Å, c=4.37Å can be approved by a series of characterizations like scanning microscopy electron (SEM), energy dispersive spectrometry (EDX), Raman spectroscopy and powder X-rays. The new preparation method of black phosphorus represents an easy, effective and low cost approach to avoid complicated preparative setups, toxic catalysts, or “dirty” flux methods and is of general interest in elemental chemistry. [less ▲]

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See detailLes problématiques de l'adaptation et de l'intersubjectivité dans la psychothérapie
Englebert, Jérôme ULg

Scientific conference (2017, May 10)

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See detailHunger Art and the Sensorium
Delville, Michel ULg

Conference (2017, May 10)

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See detailLivre de raison, livre de famille. Réflexions méthodologiques sur la diffusion extralittéraire de Gerard du Frattre
Lambert, Adélaïde ULg

Conference (2017, May 10)

Cette communication consistera à présenter le codex Paris, BnF, fr. 12791, un manuscrit personnel entièrement copié par Jacques Le Gros, un marchand de soie parisien, mort en 1551. Outre le récit épique ... [more ▼]

Cette communication consistera à présenter le codex Paris, BnF, fr. 12791, un manuscrit personnel entièrement copié par Jacques Le Gros, un marchand de soie parisien, mort en 1551. Outre le récit épique Gerard du Frattre, le codex contient des pièces portant sur l’actualité sociale et politique du 2e quart du XVIe siècle. À l’aide des travaux portant sur les livres de raison français et sur les livres de famille italiens, il s’agira d’interroger la manière dont ce recueil organique peut être appréhendé et, plus largement, de proposer quelques perspectives de recherche sur la réception des œuvres littéraires françaises dans la sphère de la bourgeoisie marchande. [less ▲]

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See detailLacustrine clay mineral assemblages as a proxy for land-use and climate changes over the last 4 kyr: The Amik Lake
El Ouahabi, Meriam ULg; Hubert, Aurelia ULg; Allan, Mohammed ULg et al

Poster (2017, May 10)

Lake sediments are sensitive to landscape changes and most of these changes seem to be modulated by land-use (anthropogenic factors) coupled to palaeoenvironmental/palaeoclimatic changes. In its detrital ... [more ▼]

Lake sediments are sensitive to landscape changes and most of these changes seem to be modulated by land-use (anthropogenic factors) coupled to palaeoenvironmental/palaeoclimatic changes. In its detrital fraction, the lacustrine sediments record the history of soil erosion within its catchment via the inputs of clays and others detrital products. Within a Mediterranean context, the study investigates the upper sediments infilling the central part of the Amik basin in southern Turkey. This tectonic basin was occupied and exploited by modern human at least since 6000-7000 BC. We focus on the clay mineralogy (x-ray diffraction on oriented aggregates) and magnetic susceptibility measurements (Bartington) of the sedimentary record in the area over the last 4000 years, to assess environmental changes in relation with the different land uses and/or weathering during the successive Bronze, Iron, Roman, Islamic/Ottoman and Modern civilizations. The clay fraction of Amik Lake sediments comprises smectite, kaolinite, illite, chlorite and chlorite/smectite mixed layers that are the inherited clay phases. A relative change in abundance and crystallinity and chemistry of illite attests that environmental conditions evolved in the Amik Plain from the Bronze to Modern Age in relation with climates and/or land-use changes. The history of the Amik Lake reveals different soil erosion episode. The most intense erosion phase occurred during the Bronze/Iron Ages as indicated by the clay and magnetic susceptibility proxies. The Roman period was an exceptional period with soil erosion products arriving from the watershed, probably due the water channelization. A reduction of soil erosion occurred during the post Roman period until nowadays. Significant pedogenesis transformations are evidenced, especially during the Islamic/Ottoman periods suggesting intense chemical weathering conditions related to climate change. [less ▲]

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See detailMorcellement des compétences économiques dans l'Etat belge : y a-t-il un pilote dans le cockpit ?
Behrendt, Christian ULg

Conference given outside the academic context (2017)

Conférence donnée à la Banque Nationale de Belgique, succursale de Liège, 10 mai 2017, à l'invitation du Forum Financier de Liège

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See detailDynamic of soil drying close to saturation: What can we learn from a comparison between X-ray computed microtomography and the evaporation method?
Parvin, Nargish ULg; Beckers, Eléonore ULg; Plougonven, Erwan ULg et al

in Geoderma (2017), 302

The soil water retention curve (SWRC) is a unique relationship between water content and soil water potential. SWRC in near saturation gives the dimension of soil macroporosity which plays an important ... [more ▼]

The soil water retention curve (SWRC) is a unique relationship between water content and soil water potential. SWRC in near saturation gives the dimension of soil macroporosity which plays an important role in water translocation into soil. Thus, the accurate measurement of SWRC is crucial. The aim of this study is to compare SWRC obtained through two different methods: X-ray computed microtomography (X-ray CT) and evaporation method by HYPROP device. Three different depths (0–10, 25–30 and 45–60 cm) are considered for soil sampling. The results showed significant differences in SWRC between the techniques. The SWRC from X-ray CT showed more volumetric water content at 25–30 cm (0.044) and 45–60 cm (0.024) than evaporation at saturation (0 kPa) in cases where the macroporosity was higher. Macropores may have connections with neighbouring pores of smaller sizes. Hence we assume that these pores can be observed through X-ray CT but cannot be evaluated by evaporation. As macropores with narrow opening do not evaporate at very low tension. These pores therefore got empty at relatively higher tension. Consequently, SWRC near saturation appeared rather flatter with the evaporation method where the X-ray CT presented deviation. Accordingly, interpretation of macro pores from SWRC through evaporation method would give comparatively smaller volume of macropores than they really are. Pore morphology and other hydraulic functions of soil, for example, mean connection surface of pores, hydraulic conductivity, and the efficiency of water conducting macropores also support the X-ray CT findings. [less ▲]

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See detailPasser à un SGB pour susciter l'appétit de changement et lutter contre l'inertie ?
Renaville, François ULg

Conference (2017, May 10)

En février 2015, les Bibliothèques de l'Université de Liège sont passées au système de gestion de bibliothèque Alma, moins de 10 ans après une migration vers Aleph et 2 ans après le lancement de la ... [more ▼]

En février 2015, les Bibliothèques de l'Université de Liège sont passées au système de gestion de bibliothèque Alma, moins de 10 ans après une migration vers Aleph et 2 ans après le lancement de la solution discovery Primo. Cette présentation balaye les moments clés du projet Alma, en mettant l'accent sur la composante organisationnelle, la gestion du changement, les attentes et espoirs suscités. [less ▲]

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See detailInnovative silage additives to reduce proteolysis in the silo
Herremans, Sophie ULg; Decruyenaere, Virginie; Beckers, Yves ULg et al

Poster (2017, May 10)

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See detailSmart-shoes self-powered by walking
Colson, Gérald ULg; Laurent, Philippe ULg; Bellier, Pierre ULg et al

Poster (2017, May 10)

Nowadays, electronic devices are more and more compact and can be integrated in nearly every object. One of the remaining challenges is to provide smarter ways to power those electronic devices. Because ... [more ▼]

Nowadays, electronic devices are more and more compact and can be integrated in nearly every object. One of the remaining challenges is to provide smarter ways to power those electronic devices. Because of the small amount of energy needed by the latest ultra-low power systems, energy harvesting from the environment becomes a viable solution to power them. In this work, we present the integration of an electronic device and an electrodynamic energy harvester (EH) in a shoe. The electronic device measures the acceleration along one axis at a sampling rate of 30 Hz and sends the data every second using a wireless link. The data are then collected by a gateway and processed to count the number of steps, calculate the contact time and the flying time of the foot. To perform this function, the device requires an average power of 951 μW which is provided by the EH. [less ▲]

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See detailEnergy product and magnetic properties of strontium hexagonal ferrite: experimental and theoretical investigation
Abraime, Brahim; Ait Tamerd, Mohamed; Mahmoud, Abdelfattah ULg et al

Conference (2017, May 10)

The interest toward hard magnetic materials increases in the last years. In order to have the best magnetic properties of these materials, researchers count on the efficiency of different synthesis ... [more ▼]

The interest toward hard magnetic materials increases in the last years. In order to have the best magnetic properties of these materials, researchers count on the efficiency of different synthesis methods. In permanent magnets application, ferrite materials possess a good place among the other magnet families. In permanent magnets field, the more important parameter that describes the magnetic strength of a magnet is the maximum energy product (BH)max. A strong permanent magnet has an important value of (BH)max. In this work, we will study the effect of annealing temperature on maximum energy product and other magnetic properties of Strontium hexaferrite SrFe12O19 synthesized using sol-gel autocombustion method, with different annealing temperatures, characterized using Thermogravimetric analysis (TGA), X-ray diffraction (XRD), scanning electron microscopy (SEM), Mössbauer spectroscopy (MS) and superconducting quantum interference device magnetometer (SQUID). Ab initio calculation for magnetic properties is also performed in order to compare it with low temperature experimental results. [less ▲]

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See detailCaractérisation des amidons de sorgho et de mil perlé cultivés dans le Sahara algérien
Boudries, Nadia ULg

Doctoral thesis (2017)

Starches of sorghum (Sorghum bicolor (L.) Moench) and pearl millet (Pennisetum glaucum (L.)) cultivated in Tidikelt (In Salah) and Ahaggar (Tamanrasset), were the subject of a characterization study. The ... [more ▼]

Starches of sorghum (Sorghum bicolor (L.) Moench) and pearl millet (Pennisetum glaucum (L.)) cultivated in Tidikelt (In Salah) and Ahaggar (Tamanrasset), were the subject of a characterization study. The approach consists of the isolation of starches, the determination of physico-chemical and functional properties and the study of enzymatic hydrolysis modification. The starches with a rate ranging from 63.1 to 66.8 % were isolated according to the alkaline method. The purity of the obtained starches is satisfactory (91.4-96.7 %).However the extraction yield remains average (59.1-61.2 %). The physical properties (color, shape and size of the granules), chemical composition (moisture, starch and amylose) and rheological properties (solubility, swelling power and viscosity) of the isolated starches were determined. Important results were obtained highlighting interesting functional properties of these starches. Indeed, the average diameter of native starches granules had reached 18 and 10µm for sorghum and pearl millet respectively. These values are lower than those of others regions cultivars and close to those of corn and cassava. The amylose content (23.0 and 27.1 %) revealed that the analyzed cereals are normal varieties. The analysis of viscosity showed a very high peak viscosity that is reached rapidly. The DSC analysis has revealed higher gelatinization temperatures, attributed to high maturity temperatures. The X-rays diffraction patterns show the type A characteristic of cereals and allowed deducing the relative degrees of cristallinity. The kinetic studies of hydrolysis showed that the sorghum and pearl millet starches present susceptibility for hydrolysis in presence of fungal, bacterial and human amylases. However, this susceptibility varies according to the treatment used with the integral grinding (flour) and to enzyme source. The experimental conditions allowing to enzymatic hydrolysis reactions of isolated starches to follow the Michaelis-Menten model were determined and kinetic constants (KM and Vmax) were calculated. The HPAEC-PAD profiles of oligosaccharides in sorghum starches hydrolysates were determinated for highlight the amylases activities. The study demonstrated the potential of sorghum and pearl millet starches and considers their applications and bioprocessing. [less ▲]

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