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Bases de données de baguage et reprises de l’IRSNB au sujet de la Chouette Chevêche Athene noctua.
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RBINS Staff Publications
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Cost Evaluation of 3D Digitisation Techniques
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In the framework of the Belgian BELSPO AGORA 3D and DIGIT03 programs, we have evaluated 3D digitising technologies with regards to the quality of the acquisition, the capacities and limitations of each technique and also the direct cost of the different 3D digitisation processes. It is on this latest topic that the paper is focused. In order to evaluate the cost of 3D digitisation, we considered the time for the digitisation, cost of the equipment and cost of the staff. Our preliminary results show that the real cost by specimen depends on the amount of specimens to digitise. Techniques that appear to be low-cost can be the most expensive in the framework of massive digitization programs, whilst more expensive equipment can be more efficient in the long term. Therefore low-cost equipment is mainly recommended for occasional digitisation or small series of digitisations.
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New fossils at the "Troisième caverne" of Goyet (Belgium) and the mortuary practices of Late Neandertals
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Neandertal discoveries in Belgium have played an important role in the history of European paleoanthropology. Late Neandertal fossils within the collections of the "Troisième caverne" of Goyet (Gesves, Belgium) have recently been identified by our multidisciplinary team. These fossils provide an opportunity to assess the variability of Late Neandertal mortuary practices. The "Troisième caverne" of Goyet, excavated at the end of the 19th and early 20th century, yielded a rich archeological sequence ranging from the Middle and Upper Paleolithic to historical times. In 2008 we began documenting the Paleolithic occupations of the "Troisième caverne" by reassessing the collections from the site, which heretofore had only een partially studied. The updated inventory of human remains was accomplished by conducting a detailed sorting of the paleontological collections in order to identify human remains that may have been overlooked thus far. As a result, the collections from the "Troisième caverne" now include nearly 200 human bones/bone fragments and isolated teeth that correspond to various materials from different periods. The morphometric study of the human specimens from Goyet, completed by direct radiocarbon dating and stable isotope analysis, reveals that they represent two main samples: a large and fragmentary series of Late Neandertal remains (Rougier et al. 2012) and a set of modern human specimens from the Upper Paleolithic (Rougier et al. 2013). The Neandertal remains include elements from the cranial and infra-cranial skeleton which represent at least 3 different individuals. The Neandertal specimens of Goyet also present numerous anthropogenic traces that are similar to those found on the fauna remains from the site. We have interpreted them as evidence of cannibalism and will discuss our observations in terms of mortuary behavior variability among Late Neandertals.
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The adult Neandertals from Spy and the variability of Late Neandertals
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Histoires de Sizerins flammés et de migration éruptive.
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Different replicative profiles in SPF chickens of H7 LPAI isolated from wild birds.
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RBINS Staff Publications
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Raman Micro - Spectroscopy as a Tool to Characterise Cobalt — Manganese Layered Oxides (Heterogenite - Asbolane – Lithipophorite), Study on Crystalline and Amorphous Phases from the DRC (Democratic Republic of the Congo)
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Stratochip, a dual balloon high-altitude platform: controlled altitude flight experiments and potential applications in geosciences.
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A high-altitude dual balloons system, the 'Stratochip', was designed at the Geological Survey of Belgium to serve as a development platform to carry measurement and earth observation equipments, in altitudes comprised between 1000 and 25000m. These working altitudes far exceed the range of current motor powered unmanned aerial vehicules, with a higher weight carrying capacity (up to 10-15kg). This platform is built around a two helium balloons configuration, than can be released one by one at a target altitude or location, allowing a partially controlled drift of the platform. Using a 'nowcasting' meteorological model, updated by flight telemetry, the predicted path can be refined live to follow and retrieve the equipment in a predicted landing area. All subsystems (balloon cut-off devices, flight controller, telemetry system) have been developed in-house. Three independent communication channels, designed to work at extremely low temperature (up to -60° C) ensure a continuous tracking until landing. A calibrated parachute is used to control the safe descent of the equipment. Several flight tests have been performed in Belgium to control the meteorological model accuracy for wind predictions (model based on National Oceanic and Atmospheric Administration data). Those tests demonstrated the capability of the platform to maintain its altitude in a predicted path, allowing using the platform for new types of atmospheric studies and affordable high-altitude remote-sensing applications (i.e. sub-meter resolution stereo imagery).
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Heterogenite vs asbolane: a mineralogical study of cobalt oxides from the DRC (Democratic Republic of the Congo)
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The largest cobalt ore reserves are located in DRC, the Democratic Republic of Congo. Most of cobalt is observed as black cobaltic oxide minerals: heterogenite [HCoO2] and asbolane [(Ni,Co)2-xMn(O,OH)4.nH2O] which are hardly differentiable since they exhibit similar macroscopic habit and textures. These minerals are frequently observed in similar environment (oxidized horizon of ore deposits) and they are commonly poorly-crystallized limiting their study with XRD. Their chemical composition is also not very well-constrained since they exhibit significant chemical substitutions with cations as Cu, Co, Ni, Mn. Our observations on a set of heterogenite and asbolane samples from DRC combined with samples from other localities shows that each phase, even under an amorphous form, can be readily distinguished by Raman microspectrometry. This technique is therefore attractive during ore deposit characterization campaigns or during the follow-up extraction operations where it is important to distinguish the main constituting Co-phase(s). The main advantage of this technique is its speed since no sample preparation is required during the collection Raman spectra that usually last few tens of seconds. The method provides information at a mum-scale and several points are thus required to fully characterize ore batches composed of different mineralogical phases. Our petrographical observations show also that asbolane and heterogenite mineralogical phases can coexist at a mum-scale as two distinct phases into 'heterogenite' ore. The distinction between heterogenite and asbolane from our sample set can also be conducted on a chemical base showing that heterogenite represents the richer Co-phase with variable Cu concentrations. By contrast, only Mn traces are usually observed in heterogenite minerals from DRC except in few samples, but always in lower concentration than in asbolane. The latter shows variable Mn/(Mn+Co) ratio between 0.85 and 0.3 and the decrease of this value is related to enrichment into Cu.
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The shaping of Brussels‘ urban landscape: an interdisciplinary perspective
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