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Inproceedings Reference Retour sur les collections gravettiennes de Maisières-Canal: Réévaluation du potentiel du site et premiers regards croisées sur l’exploitation alimentaire et technique des ressources animales fossiles et non fossiles.
Located in Library / RBINS Staff Publications 2017
Inproceedings Reference Il était une fois Clairefontaine : le quotidien des nonnes d’une abbaye cistercienne au 18ème siècle.
Located in Library / RBINS Staff Publications
Inproceedings Reference Oiseaux des villes, oiseaux des champs. Réflexions sur le rôle des espaces ruraux dans l’approvisionnement en oiseaux des zones urbanisées au Moyen Âge.
Located in Library / RBINS Staff Publications
Inproceedings Reference Oiseaux et sociétés humaines de la préhistoire à nos jours
Located in Library / RBINS Staff Publications
Inproceedings Reference Avian resources in Medieval and Modern Belgium
Located in Library / RBINS Staff Publications
Inproceedings Reference Impact of the introduction of turkey on poultry husbandry in Northwestern Europe
Located in Library / RBINS Staff Publications
Inproceedings Reference Advances in high-resolution paleoclimate reconstructions using growth experiments, age modelling and clumped isotope analyses
Located in Library / RBINS Staff Publications 2021
Inproceedings Reference Using Fibre-Optic DAS surveying to de-risk a shallow geothermal energy storage site in Brussels, Belgium
Europe is working hard to meet its first climate goals. With High Temperature Aquifer Thermal Energy Storage (HT-ATES) large quantities of green energy can be stored in the subsurface in the form of heat. It is important that a site is characterised well as leakage from the reservoir would degrade the efficiency of the system, and could also endanger potable water supplies. Seismic imaging is currently the method with highest resolution and the largest de-risking capability for geothermal projects. This study pursues the use of fibre-optic distributed acoustic sensing (FO-DAS) technology in seismic acquisition to improve the de-risking ability of seismic data in urban HT-ATES settings. In 2019 TNO and GSB combined a dense surface based high resolution seismic survey with a FO-DAS VSP survey on a potential ATES site in the city of Brussels, Belgium. Besides the technology demonstration, targets were aquifer + seal continuity and depth away from the well as well as acoustic velocity of the sediment overburden for H/V Spectral Ratio calibration. The intermediate result indicates that with FO-DAS it is possible to image the subsurface relatively easy, fast, at low cost and with low environmental impact, even in busy seismically noisy urban areas.
Located in Library / RBINS Staff Publications 2020
Inproceedings Reference BrugeoTool: “All in One” Professional Geoscientific Tool of Brussels.
Key words: Shallow geothermal, Resources assessment, Geoscientific tool, Brussels Since 2015, the interest in installing shallow geothermal systems has significantly increased in Brussels Capital Region (BCR). However, limited knowledge of ground conditions, lack of public awareness and an urban context restrict the development of shallow geothermal systems in the BCR despite the high potential of this technique in the area. The BRUGEO project was launched thanks to ERDF funding and aims to facilitate accessibility and the efficient use of shallow geothermal energy in the Brussels region. In this four years project (2016-2020), specific actions promoting the geothermal potential of the BCR are addressed: 1- Collect existing data related to the knowledge on Brussels subsurface (geological, hydrogeological, and geothermal data); 2- Conduct new laboratory and field tests in order to complete geological analyses and to assess geothermal parameters; 3- Map the geothermal potential for open and closed systems. The BrugeoTool was developed in 2020 conjointly with Brussels Environment and intends to be a useful tool at any stage of the process of a geothermal project for citizens, project managers as well as for experts. From the project manager side, BrugeoTool provides information on geothermal potential for open and closed systems, plans and controls the stages of a geothermal project, analyzes environmental constraints and helps to prepare the application for an environmental permit, and predesigns a geothermal installation using the Smartgeotherm tool developed by the Belgian Building Research Center. From the expert point of view, BrugeoTool allows to consult geological, hydrogeological, geothermal and environmental data in the form of maps (2D), it automatically draws up a lithostratigraphic (1D) log synthesizing the geological, hydrogeological and geothermal parameters, explores the Brustrati3D geological model (3D), evaluates the (pre) feasibility of a shallow (<300 m) vertical geothermal project for open or closed systems and carries out its pre-sizing. Finally, this webtool lets the citizens to familiarize themselves with the geology and hydrogeology of Brussels and its environmental context.
Located in Library / RBINS Staff Publications 2020
Inproceedings Reference A posteriori verification methodology for astrochronology: a step further to improve the falsifiability of cyclostratigraphy
Cyclostratigraphy is increasingly used to improve the Geologic Time Scale and our understanding of past climatic systems. However, except in a few existing methodologies, the quality of the results is often not evaluated. We propose a new methodology to document this quality, through a decomposition of a signal into a set of narrow band components from which instantaneous frequency and amplitude can be computed, using the Hilbert transform. The components can be obtained by Empirical Mode Decomposition (EMD), but also by filtering a signal (be it tuned or not) in any relevant way, and by subsequently performing EMD on the signal minus its filtered parts. From that decomposition, verification is performed to estimate the pertinence of the results, based on different concepts that we introduce: Integrity quantifies to what extent the sum of the components is equal to the signal. It is defined as the cumulated difference between (1) the signal, and (2) the summed components of the decomposition. EMD fulfils integrity by design, except for errors caused by floating-decimal arithmetic. Ensemble Empirical Mode Decomposition (EEMD) may fail to satisfy integrity unless noisy realisations are carefully chosen in the algorithm to cancel each other when averaging the realisations. We present such an algorithm implemented in R: “extricate”, which performs EEMD in a few seconds. Parsimony checks that the decomposition does not generate components that heavily cancel out. We propose to quantify it as the ratio between (1) the cumulated absolute values of each component (except the trend), and (2) the cumulated absolute values of the signal (minus the trend). The trend should be ignored in the calculation, because an added trend decreases the parsimony estimation of a similar decomposition. IMF departure (IMFD) quantifies the departure of each component to the definition of intrinsic mode functions (IMF), from which instantaneous frequency can reliably be computed. We define it as the mean of the absolute differences of the base 2 logarithms of frequencies obtained using (1) a robust generalized zero-crossing method (GZC, which simplifies the components into extrema separated by zero-crossings) and (2) a more local method such as the Hilbert Transform. Reversibility is the concept that all initial data points are preserved, even after linear interpolation and tuning. This allows to revert back to the original signal and discuss the significance of each data point. To facilitate reversibility we introduce the concept of quanta (smallest depth or time interval having significance for a given sampling) and an algorithm computing the highest rational common divisor of given values in R: “divisor”. This new methodology allows to check the final result of cyclostratigraphic analysis independently of how it was performed (i.e. a posteriori). Once the above-mentioned concepts are taken into account, the instantaneous frequencies, ratios of frequencies and amplitudes of the components can be computed and used to interpret the pertinence of the analysis in a geologically meaningful way. The instantaneity and independence of frequency and amplitude so obtained open a new way of performing time-series analysis.
Located in Library / RBINS Staff Publications 2020