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Richard Hoesman, concepteur et réalisateur de vitraux pour Érard de La Marck, banni de Liège en 1533
Get PDFHilary Wayment’s discovery in 1983-1984 of a relatively unknown project for a stained-glass window at the Kuperstichkabinett in Berlin has shed new light on the stained-glass work of Richard Hoesman, a glassmaker banished from the city of Liège in 1533. As Yvette Vanden Bemden had hypothesised, Richard Hoesman is indeed linked to at least the design of three stained glass windows in the choir of the Basilica of Saint-Martin in Liège, donated by Prince-Bishop Érard de La Mark, and a monumental stained-glass window on the theme of the Life of Saint Hubert, intended for the church of the former Abbey of Saint-Hubert. These works establish Richard Hoesman as a talented designer at a time when the art of stained glass was embracing the innovations of the Italian Renaissance.Número extraordinario, Homenaje al profesor Dr. Matías Díaz Padrón (1935-2022)
Natural Forest regeneration through fire protection is a less imminent threat for truly stable savannas than afforestation.
Get PDFValorizing xylaria using computer vision-based wood identification: a case study on the INERA-Yangambi xylarium
Get PDFXylaria provide crucial reference materials for botanical studies, wood anatomical research, and forensic investigations. However, the accuracy of specimen identification within these collections is not always guaranteed, as specimens with dubious origins can enter collections, risking research integrity. Ascertaining the taxonomy is therefore crucial. Although a full wood anatomical assessment could theoretically identify all specimens, this process would be impractically time-consuming, requiring years of intensive microtomy work. Artificial intelligence offers a faster, more economical solution. Computer vision-based wood identification uses wood images as diagnostic information to develop models that can distinguish timbers. This method enhances the reliability of xylaria, thereby increasing the trustworthiness of the research performed on them. The objective of this study was to classify 58 Congolese wood genera through precise multiclass classification. The Xception architecture was leveraged on macroscopic cross-sectional RGB images, utilizing the SmartWoodID database derived from the Tervuren xylarium as training data. A total of 1700 specimens were divided into training (80%) and test (20%) datasets while maintaining species balance. Images were cropped into square patches with a side length of 5.42mm. Five-fold crossvalidation was used for evaluation, and the most performant model was applied to the xylarium of the INERA-Yangambi research center. Performance was assessed by calculating recall scores for all genera across folds for all patches, and for aggregated results per specimen. The predicted genus for each specimen was determined by majority vote on patch predictions and compared to the specimen's recorded genus. In total, 193 specimens of the INERA-Yangambi xylarium were classified. Among these, 57 specimens were misclassified at the genus level. This research demonstrates that AI can significantly enhance the accuracy and reliability of xylaria, facilitating more dependable botanical and wood anatomical studies
The late Pleistocene and Holocene chronocultural and anthracological open-air sequence from Mukila (Democratic Republic Congo)
No full textMorphological, acoustic and genetic identification of a reproducing population of the invasive African clawed frog Xenopus laevis (Anura, Pipidae) recently discovered in Belgium
No full textThe African clawed frog (Xenopus laevis) is an aquatic invasive species of amphibian imported from South Africa for medical research and aquarium pet trade. Released on purpose or by accident, an invasive spread of Xenopus laevis to natural ecosystems was registered on most continents. In the absence of natural predators, their population densities can increase quickly causing damage to local aquatic ecosystems. Using external morphology of adults and tadpoles, osteology from high-resolution microcomputed tomography, vocalization analysis and DNA sequence data, this study assessed the identity of a reproducing Belgian Xenopus population at the current northernmost edge of the distribution of the genus in Europe. Morphological analysis of adult and tadpoles confirms that the Xenopus population from Comines-Warneton belongs to the species Xenopus laevis. Genetic analysis indicates two phylogeographic lineages of South African origin invading France, one originating from northern South Africa and Rooikrantz Dam and the other originating from the southwestern Cape. Given the relative isolation of the Belgian pond, the abundance of Xenopus laevis in the pond, and the presence of tadpoles as well as subadults and large adults, it is certain that X. laevis has been present since several years. Most likely surrounding streams and ponds are also housing them and the area needs to be monitored closely in the future to prevent further spread. Citation: Pauwels, O.S.G., Brecko, J., Baeghe, D., Venderickx, J., Backeljau, T. & Vanderheyden, A. 2024. Morphological, acoustic and genetic identification of a reproducing population of the invasive African clawed frog Xenopus laevis (Anura, Pipidae) recently discovered in Belgium. Abstract 248 in: ICAIS 2024 Abstracts of Presentations. 23rd International Conference on Aquatic Invasive Species, May 12-16, Halifax, Canada
Evidence that recent climate changes have expanded the potential geographical range of the Mediterranean fruit fly.
No full textA Note on the Trident Mark, Stone Worship and Cult Practices in SE-Arabia
Get PDFThe worship of baetyls in antiquity is well documented in the Near East and the Mediterranean, archaeologically as well as historically. While such practices were also common in South-East Arabia, the archaeological information on it is still very limited. A boulder carved with a "trident" (a mark familiar from local Abiel coin issues), which came to light at the site of Mleiha, has a circular cavity on the side similar to those visible on stones and on an eagle statue from contemporary ed-Dur. This association suggests a religious context for the Mleiha petroglyph and thus a possible identification as a baetyl. The archaeological evidence for stone worship and associated cult practices from the SE-Arabian Mleiha / PIR A-C period (3rd century BCE - 3rd century CE) is reviewed and compared with ethnographic parallels and information from, among others sources, the Kitāb al-aṣnām (Book of Idols) by Hisham ibn al-Kalbi (737-819 CE)
Late Pan-African Murzuq event in the Central Hoggar: Sinistral displacement along the Ounane major shear zone (Gour Oumelalen, Algeria) shown by the magnetic fabric of the Tisselliline pluton.
No full textThe late upper-level subcircular Tisselliline pluton (c. 572 Ma), emplaced in Hoggar along the major Pan-African Ounane shear zone, is NNW-SSE oriented. Its magnetic fabric is mainly characterized by dome-shaped magnetic foliations and subhorizontal magnetic lineations. When approaching the nearby Ounane shear zone, the linea tions become associated with a prolate shape of the fabric and their direction evolves from NE-SW to NNE-SSW. This highlights a stretching underwent by the pluton during its late magmatic stage, in agreement with the shape of the pluton itself. These characteristics indicate a sinistral movement along the Ounane shear zone during the emplacement of the Tisselliline pluton. It is the opposite to the dextral movement that affected earlier the older Ounane batholith (c. 629 Ma) located on the other side of the shear zone. This sinistral movement can be related to the NE-SW compression that occurred in the Eastern Hoggar, western part of the Saharan metacraton, during the Murzukian event. Its age, given by the Tisselliline pluton age (c. 572 Ma), corresponds indeed to the initiation of this event (575-555 Ma). This shows that the Eastern Hoggar Murzukian event affected also the Central Hoggar, even if with a much lower intensity