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Today, our planet is undergoing major climatic changes. Particularly in the face of rising temperatures, it is not easy to predict how flora and fauna will react and adapt in disturbed ecosystems. International research, in which Professor Johan Yans' team (Department of Geology and ILEE Institute) is taking part, has found some answers in fossils, which have been the memory of Darwinian evolution for millions of years. Explanations.

JuryDr. Nikolai TUMANOV (UNamur), PresidentProf. Bao-Lian SU (UNamur), SecretaryProf. Yann GARCIA (UCLouvain)Prof. Teng BÊN (Jinhua University)Prof. Guillaume BERIONNI (UNamur)Prof. Alain KRIEF (UNamur)Prof. Alain KRIEF (UNamur)AbstractPorous crystals with structural flexibility are difficult to realize because flexible molecules often rearrange or leave the lattice, leading to pore collapse. Since the early 2000s, it has become clear that combining robust intermolecular interactions with flexible linkers and deformable nodes can stabilize porous crystals during guest removal. Frameworks such as MOFs, COFs, and HOFs benefit from strong noncovalent interactions, yet permanently porous HOFs remain uncommon due to dense molecular packing.Porous organic salts (POSs) offer an alternative strategy, assembling predictable networks from oppositely charged organic ions where electroneutrality and stoichiometry guide structure formation. However, most 3D POSs rely on planar guanidinium or tetrahedral tetraphenylmethane derivatives, resulting in a narrow set of topologies compared with the thousands of 3D nets catalogued in the Reticular Chemistry Structure Resource (RCSR).Here we report triptycene-based ionic frameworks (TIFs) formed via charge-assisted ammonium-sulfonate hydrogen bonding. By tuning triptycene symmetry and functionalization, together with sulfonate linker geometry, we generated diverse supramolecular architectures with tailored porosity, stability, and function.

JuryProf. Guillaume BERIONNI (UNamur), PresidentProf. Stéphane VINCENT (UNamur), SecretaryProf. Carmen GALAN (University of Bristol)Dr. Louis FENSTERBANK (Collège de France)Prof. Raphaël ROBIETTE (Université catholique de Louvain)AbstractCarboxylic acids are ubiquitous in nature and inexpensive compounds. Decarboxylation has become a key chemical transformation and has been widely reported in organic chemistry except for carbohydrates. This reaction can be catalyzed by transition metal and can also be induced by light, thermal activation, or photocatalysis. Borylated compounds have stimulated the pharmaceutical industry's interest (Boromycin, Bortezomib or boron neutron capture therapy). Recent methodologies have been developed to transform carboxylic acids to boronate esters by metal-catalyzed or light-promoted or photocatalyzed reactions. In this thesis, we explored the synthesis of borylated carbohydrates through a decarboxylation pathway. More specifically, sialic acids being among the most important carbohydrates in glycobiology, we addressed the problem of the synthesis of borylated sialic acids. On the other hand, organophosphates play an important role in diverse fields: in materials chemistry, in agriculture, in organic chemistry, and in biochemistry. Phosphorylation is a key reaction in biological processes such as signal transduction and cell activity regulation. The formation of phosphorylated carbohydrates has been widely described through two-electron mechanisms. However, radical phosphorylation of carbohydrates remains unexplored. This Ph.D. thesis describes the development of new methodologies for the decarboxylative functionalization of carbohydrates, focusing on borylation and phosphorylation..

One foot in the past, the other in the future. From Etruscan granulation to PIXE analysis, Serge Mathot has built a unique career, between scientific heritage and particle accelerators. Portrait of a passionate alumnus at the crossroads of disciplines.

Laura Gagliardi is a renowned international researcher at the University of Chicago, recognized for her pioneering contributions to theoretical and computational chemistry, particularly in the study of reticular materials such as metal–organic frameworks (MOFs). The Solvay/Syensqo Chair in Chemistry honors chemists who have made exceptional advances in their fields. As part of this distinction, Professor Gagliardi delivered a series of lectures at several Belgian universities, including a seminar at the University of Namur, Department of Chemistry.

At a time when misinformation, post-truths and conspiracies are undermining confidence in science, UNamur welcomes SPiN (Science & Philosophy in Namur), a new interdisciplinary research center that questions the place of science in society. Founded last September by Olivier Sartenaer, Professor of Philosophy of Science at UNamur, SPiN brings together philosophers and scientists around a common vision: to develop a critical and accessible reflection on science in all its diversity..

Why take English classes when you want to become a veterinarian? How can you teach Spanish to future management engineers? Far from vocabulary lists or lab classes with headphones, these languages are taught as genuine cross-disciplinary skills that are essential for the jobs of tomorrow. 

The University of Namur is soon to offer two inaugural lessons for two Francqui Chairs, one in the Faculty of Science and the other in the Faculty of Law. Open to all, the inaugural lectures will be followed by a local drink. These events are free, upon registration.

JuryProf. Eli THORÉ (UNamur), PresidentProf. Patrick KESTEMONT (UNamur), SecretaryProf. Ranjàna RANDRIANARIVO (Université d'Antananarivo)Dr. Valérie CORNET (UNamur)Dr. Omayma MISSAWI (UNamur)Prof. Catherine MOUNEYRAC (Université Catholique de l'Ouest)Prof. Gauthier EPPE (ULiège)SummaryThe widespread production and use of plastics have led to their continuous release into the environment. Microplastics (MPs) are now ubiquitous in aquatic ecosystems, where their bioavailability to organisms and potential entry into the food web raise serious environmental and public health concerns. Substantial progress has been made in understanding MP toxicity, and their hazardous potential is now widely acknowledged. However, MP toxicity studies remain complex, as multiple particle characteristics, such as size, shape, polymer type, and sorbed contaminants might influence both bioavailabilityTo bridge this gap, the present thesis adopted a dual, complementary approach: (i) characterizing the environmental occurrence and bioavailability of MPs, and (ii) assessing the ecological relevance of using environmentally derived MPs in in vivo toxicity experiments.Overall, this thesis provides insights into the reproductive and transgenerational effects of environmentally relevant MPs while underscoring the importance of considering particle-pollutant interactions. By combining in situ field data with in vivo laboratory experiments, it demonstrates that the use of environmentally derived MPs represents a more realistic and ecologically meaningful approach to hazard characterization. Further studies should be carried out in this same perspective to generate robust, exploitable data and contribute to establishing a comprehensive MP risk characterization.

South America is a subcontinent rich in natural and cultural resources. Between biodiversity preservation and development cooperation, UNamur maintains valuable partnerships to address the challenges of biodiversity loss and understand current socio-economic transformations. Immersion in Ecuador and Peru. 

Conceptual field theory and didactic situation theory Two complementary theories for thinking about and organizing mathematical learningIn the first part of this talk, I'll propose an introductory situation in literal arithmetic (Barallobres & Giroux, 2008) that will enable me to introduce and illustrate the main concepts and methodological tools of the theory of didactic situations developed by Guy Brousseau (Brousseau, 1997; Bessot, 2024). In the second part, I will give a brief presentation of Gérard Vergnaud's theory of conceptual fields (Vergnaud, 1990; Durand-Guerrier and Saby, 2023), then show how this theory helps to shed further light on the introductory situation.The contributions of the anthropological theory of didactics The Anthropological Theory of Didactics (TAD, Chevallard, 2001) aims to explain why and how a given knowledge lives in a certain institution, and/or is transformed as it passes from one institution to another. This perspective and some of its evolutions will be presented and illustrated in this talk.Students' activities and teachers' practices in the mathematics classroom: analysis methodology with Activity TheoryIn this talk, we will present the founding assumptions of the Activity Theory framework adapted to the Didactics of Mathematics (TADM, Vandebrouck, 2008), showing how this theory gives importance to fine-grained analyses of mathematical knowledge to appreciate classroom developments. We will then exemplify some of these aspects on the teaching of limits at university (Bridoux and Grenier-Boley, 2024).BibliographyBarallobres, G., & Giroux, J. (2008). Environmental deficiencies and regulations in validation situations. N. In Berdnaz, & C. Mary (Eds). L'enseignement des mathématiques face aux défis de l'école et des communautés. Actes du colloque EMF 2006 (CD-ROM). Éditions du CRP https://emf.unige.ch/application/files/1414/5390/4857/EMF2006_GT8_Barallobres.pdfBessot, A. (2003). An introduction to the theory of didactic situations. Cahiers du laboratoire Leibniz, 91. hal-00078794Bridoux, S., & Grenier-Boley, N. (2024). What teaching practices should be used to introduce the limits of functions in the first year of university? A case study. In A. González-Martín, G. Gueudet, I. Florensa & N. Lombard (Eds.), Proceedings of the Fifth Conference of the International Network for Didactic Research in University Mathematics (INDRUM 2024, 10-14 June 2024) (pp. 791-800). Escola Universitària de Sarrià. Univ. Autònoma de Barcelona and INDRUM.Brousseau, G. (1997). Théorie des situations didactiques. Lecture given at the award to Guy Brousseau of the title of Doctor Honoris Causa from the University of Montreal. http://www.cfem.asso.fr/actualites/archives/Brousseau.pdfChevallard, Y. (2001). Organizing study: 1. Structures and Functions. In J.-L. Dorier, M. Artaud, M. Artigue, R. Berthelot, & R. Floris Proceedings of the XIe École d'été de didactique des mathématiques. (pp. 3-32). Editions la Pensée Sauvage.Durand-Guerrier, V., & Nicolas Saby, N. (2023). Usages de la théorie des champs conceptuels en didactique des mathématiques. The example of transitivity. Caminhos da Educação Matemática em Revista, 13 (4),118-134. ⟨hal-04585866⟩Vandebrouck, F. (dir.) (2008). La classe de mathématiques: activités des élèves et pratiques des enseignants. OCTARES Éditions.Vergnaud, G. (1990). Conceptual field theory. Recherches en didactique des mathématiques, 10(2/3), 133-170. In practice Program18:00: Presentation by Viviane Durand-Guerrier 18:40: Presentation by Ghislaine Gueudet 19:20: Presentation by Nicolas Grenier-Boley and Stéphanie Bridoux20:00: Q&A around the three presentationsModalities Required registration via the PhD school website or direct link to the registration form.Or online participation link (via TEAMS).

JuryProf. Nicolas DENDONCKER (UNamur), PresidentProf. Sabine HENRY (UNamur), SecretaryDr. Sébastien DUJARDIN (UNamur)Prof. Pierre OZER (ULiège)Prof. Emmanuel TWARABAMENYE (University of Rwanda)Prof. Caroline MICHELLIER (MRAC and UCLouvain)AbstractThis research investigates community vulnerability to landslides and floods in Northwestern Rwanda, hazards that frequently interact to produce compound disasters. The research focused on understanding the institutional, social, and structural factors that shape vulnerability and adaptive capacity in this disaster-prone region. Using a mixed-methods approach at local-scale, including institutional analysis, household surveys (n = 904), and field observations, the research highlights how vulnerability is shaped by socio-economic conditions, weak institutional coordination, and limited adaptive capacity. A Contextualized Vulnerability Index (CoVI) was developed to map vulnerability patterns, revealing particularly high vulnerability in landslide-prone and dual-hazard zones. The analysis of adaptive capacity showed that while awareness of hazards is high due to lived experiences, financial constraints, and limited technical knowledge hinder communities' ability to adapt effectively. The study contributes to the literature on social vulnerability and disaster risk reduction by emphasizing the importance of locally grounded, evidence-based strategies to strengthen community resilience in hazard-prone regions.