22 research outputs found
Les dossiers de la colonie. Les archives de la colonisation belge, entre enjeux historiques et interrogations citoyennes
Ces derniers mois, les statues coloniales ont Ă©tĂ© au cĆur de nombreux et vifs dĂ©bats ; les uns souhaitent les dĂ©boulonner jugeant quâelles nâont plus leur place dans la Belgique contemporaine quand dâautres rĂ©clament leur conservation sous peine « dâeffacer lâhistoire ». Les discussions concernant le patrimoine colonial sont plus complexes quâil nây parait et ne peuvent en aucun cas se limiter aux statues. Celui-ci comprend aussi les archives et les objets culturels produits Ă cette pĂ©riode ainsi que, de maniĂšre gĂ©nĂ©rale, le paysage urbain notamment. Les archives sont produites par les acteurs de la colonisation pour documenter leurs activitĂ©s administratives, Ă©conomiques ou missionnaires comme leur vie quotidienne. La plupart de ces documents ont Ă©tĂ© transfĂ©rĂ©s Ă Bruxelles au moment de lâindĂ©pendance. Les biens culturels sont façonnĂ©s dans diffĂ©rentes rĂ©gions du Congo avant dâĂȘtre (mal) acquis par des ethnologues ou fonctionnaires coloniaux principalement pour les envoyer aux musĂ©es mĂ©tropolitains. Le paysage urbain, et bruxellois en particulier, a Ă©tĂ© largement redessinĂ© durant la pĂ©riode coloniale. LĂ©opold II a veillĂ© Ă inscrire le Congo dans lâespace public. A son instar, de nombreux Ă©diles communaux et des entreprises ont Ă©rigĂ© des monuments ou nommĂ© des rues en rĂ©fĂ©rence Ă lâaction coloniale. Ce cycle se propose de revenir sur chacun de ces trois Ă©lĂ©ments avant dâenvisager la question de leur devenir en questionnant les notions de restitution et de rĂ©appropriation
Une culture de lâĂtat ? Lobbies, pĂ©titions et prise de dĂ©cision dans les Pays-Bas (15e-17e siĂšcles)
Conférence podcastable sur le site de l'Académie TV : http://lacademie.tv/cycles/une-culture-de-l-etat-lobbies-petitions-et-prise-de-decision-dans-les-pay-bas-xve-xviie-siecles
Les conditions particuliĂšres Ă prendre en compte. Perspectives de la Belgique
En pratiques avancĂ©es en Ă©ducation pour la santĂ© et en soins de santĂ© primaire, il est parfois nĂ©cessaire de prĂȘter plus d'attention Ă certaines conditions. Cette prĂ©sentation a pour but de mettre en lumiĂšre les conditions particuliĂšres des personnes migrantes en Belgique et la place de l'intervenant en soins infirmiers
Water chemistry and not urbanization influences community structure of non-marine Ostracoda (Crustacea) in northern Belgium
Urbanization is one of the major causes of the destruction of natural habitats in the world. Cities are urban heat islands and can thus significantly influence populations of plants and animals. The research project SPEEDY investigated the effects of urbanization in northern Belgium with a nested sampling design at local and landscape scales for a variety of organisms. Here, we tested the effects of urbanization on non-marine ostracod communities, sampling 81 small pools in three urbanization categories, as defined by percentage built up cover (low, intermediate, high). We identified 17 ostracod species, together occurring in 60 of the 81 sampled pools. We found that urbanization per se had no significant effect on ostracod communities. Of all the measured local factors, ammonium and total phosphorus concentrations had a significant effect on the community structure. In contrast, water temperature had no significant effect, most likely because the ostracod species found in northern Belgium in the present survey mostly have wide temperature tolerances.</jats:p
Self-organization mechanisms in a Fe-Au film: from isolated core-shell to multicore nanoparticles
International audienceMany nanotechnological applications necessitate a high density of nanoparticles (NPs), making NP morphology control highly challenging. In this work, the morphology of bimetallic NPs formed by magnetron sputtering deposition of a Fe(3 nm)-Au(2 nm) bilayer film on an amorphous silica substrate is analyzed using high-angle dark-field scanning transmission electron microscopy (HAADF-STEM). While all the NPs adopt a Fe-Au core-shell chemical order, they can be sorted into three different types. Isolated NPs, displaying either a highly symmetric centered core geometry (CC-type) or an asymmetrical off-centered core geometry (OC-type), are observed despite the rather large metallic volume. The majority of the NPs however displays a multicore geometry, with Fe cores in the 10-12 nm range, larger than the NPs observed in a pure Fe (3nm) film grown under identical conditions. The driving forces leading to the different morphologies are discussed together with the role played by the environnement
Inhomogeneous spatial distribution of the magnetic transition in an iron-rhodium thin film
International audienceMonitoring a magnetic state using thermal or electrical activation is mandatory for the development of new magnetic devices, for instance in heat or electrically assisted magnetic recording or room-temperature memory resistor. Compounds such as FeRh, which undergoes a magnetic transition from an antiferromagnetic state to a ferromagnetic state around 100â°C, are thus highly desirable. However, the mechanisms involved in the transition are still under debate. Here we use in situ heating and cooling electron holography to quantitatively map at the nanometre scale the magnetization of a cross-sectional FeRh thin film through the antiferromagneticâferromagnetic transition. Our results provide a direct observation of an inhomogeneous spatial distribution of the transition temperature along the growth direction. Most interestingly, a regular spacing of the ferromagnetic domains nucleated upon monitoring of the transition is also observed. Beyond these findings on the fundamental transition mechanisms, our work also brings insights for in operando analysis of magnetic devices