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Applications of imaging methodologies to paleoanthropology: beneficial results relating to the preservation, management and development of collections
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The limited number of unearthed fossils and their accessibility are factors that hinder paleoanthropological studies. Original remains, but also osteological collections of extant specimens, have to be curated in optimal and adapted environments, and direct manipulation needs to be limited in order to preserve this irreplaceable patrimony. Imaging methodologies have recently provided ways for innovative advances in the preservation of these collections, as well as offering new perspectives to museographic displays and original scientific studies. Here, we describe recent examples of developments obtained from imaging methodologies and discuss methodological and ethical implications of these new “virtual” collections. Undeniably, “virtual anthropology” is an additional tool in our large set of analytical possibilities and for curators, with its specific constraints related to the particular nature of the analysed material. Finally, we suggest some possible guidelines for the optimisation of the preservation, management and development of collections while preserving their scientific exploitation.
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Virtual reconstruction of the Neandertal lower limbs with an estimation of hamstring muscle moment arms
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A major problem of fossil hominid analysis is a lack of complete specimens. Many individual specimens have been damaged by the effects of diagenesis and excavation. Significant advances in the field of three dimensional image processing (3D) have enabled the creation of accurately scaled reconstructions of individual fossil bones using mirrored parts of the same fossil bone or human/fossil hominid equivalents. This study presents, for the first time, a method to reconstruct a 3D virtual model of the lower limb of the Neandertal using different bones from different fossil remains (Spy II, Neandertal 1 and Kebara 2) and integrating them into a single model of the Neandertal lower limb. A biomechanical analysis of the model was performed, including computer graphics visualization of the results, motion displacement graphs and muscle moment arms. The overall method has been implemented into an open-source customized software (lhpFusionBox) developed for the biomechanical study of the musculoskeletal system.
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Surface scanning of anthropological specimens: nominal-actual comparison with low cost laser scanner and high end fringe light projection surface scanning systems.
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We tested three surface scanning Systems: the low cost NextEngine laser scanner, the white light Fringe Projection Breuckmann Smartscan and the white light Fringe Projection Steinbichler COMET V 4M. We evaluate the potential of such Systems for digitalizing original anthropological specimens and compare it with a "nominal" 3D model derived from mCT or CT data. Our results show that surface scanning of teeth is generally problematic even for high end systems. Even though studies of the occlusal surface are possible with high end systems, high resolution mCT still has to be considered the best choice for scientific studies dealing with details of the occlusal surface. However, for general digitalization purposes and recording of dimensions even the NextEngine system is suitable. In our tests, Breuckmann Smartscan produced the best models with the lowest deviation compared to the nominal mCTmodel. The Steinbichler is the fastest system but the quality of the resulting models is slightly lower. NextEngine produces a clearly lower quality than the tested high end systems but if one considers the different price margins of the systems, the proportionally good data provided by NextEngine is remarkable. In the case of bones with a simple geometric structure, this low cost scanner can compete easily with 3D models derived from medical CT for gross morphometric studies.
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Acquisition de la collection de Spy de François Beaufays (dit « l’horloger ») par l’Institut Royal des Sciences Naturelles de Belgique
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Des Néandertaliens dans la troisième caverne de Goyet.
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Les Néandertaliens mosans
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Le réexamen des collections de Spy.
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Natuursteen in het museum
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Les squelettes néolithiques découverts dans les grottes du Bassin mosan.
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Notice explicative de la feuille Amberloup - Flamierge 60/5-6
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