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Le Printemps des Sciences is the must-attend science and technology event in Wallonia and Brussels. It takes place every year in early spring and offers free activities accessible to all.

The 11th edition of the Ma Thèse en 180 secondes competition was held this Friday, March 28, 2025 at the Faculty of Science. Three biologists will represent UNamur at the Belgian final, to be held in Mons on May 21.

On the occasion of the International Day of Women and Girls in Science proclaimed on February 11 by the United Nations General Assembly, and as part of the European alliance European Space University for Earth and Humanity (UNIVERSEH) focusing on the theme of space, discover the testimonies of four women scientists from UNamur working on astronomical themes.

First a student, then an assistant at the Faculty of Law, Manuela Cadelli has now been a judge at the Namur Court of First Instance for almost a quarter of a century, but she also finds the time and resources to get involved. Time for scientific collaboration, for example, since she is a member of the CRIDS (Centre de Recherche Information, Droit et Société) at UNamur, where she is interested in the role of artificial intelligence in the judge's decision-making process. Time, too, to fight battles. Fighting for a stronger, more supportive, fairer justice system. Through her books, her "cartes blanches" and her various mobilizations, she asserts her positions, making her one of the "voices" of the Belgian justice system. Deeply human, she is committed to respecting the rights of each and every individual. And the citizen pays her back in spades. In the "pas perdus" rooms of the Palais de Justice de Namur, where she welcomes us, not a minute goes by without someone coming up to greet her.

On January 23 and 24, 2025, UNamur experts were present at the SETT (School Education Transformation Technology) trade show for its sixth edition. A must-attend event for digital education in the Wallonia-Brussels Federation, dedicated to principals, teachers and technical-pedagogical advisors.

In October 2024, Guillaume Berionni, a researcher in the Department of Chemistry at the University of Namur, received the Royal Society of Chemistry's (RSC) triennial prize from its President, Professor Anne-Sophie Duwez. A fine reward for his research team in organometallic reactivity and catalysis (RCO), but also for our institution and its Department of Chemistry.

Anthony Simonofski and Olivier Sartenaer, have been elected to join the prestigious Collégium de l'Académie royale de Belgique. Bringing together young researchers (under 40) from Wallonia-Brussels who have particularly distinguished themselves in their careers, the Collégium's objectives include promoting the arts and research.

This is a fine reward for Professor André Füzfa, astrophysicist in the Department of Mathematics and head of the Astronomical Observatory at UNamur. On November 21, he received the "Coup de Coeur" award from the Trophées de Matière Grise, RTBF's popular science program 2024. These trophies aim to reward the country's scientists, who mobilize to disseminate their knowledge and insights to the general public.

A practical training course in computational quantum chemistry was organized from May 26 to 30, 2025 as part of an ERASMUS+ collaboration between the University of Sfax and the University of Namur. This inter-university training course for PhD students in chemistry and physics from the Tunisian University brought together more than 20 students.

Abstract Radiotherapy is a cornerstone of cancer treatment and is currently administered to approximately half of all cancer patients. However, the cytotoxic effects of ionizing radiation on normal tissues represent a major limitation, as they restrict the dose that can be safely delivered to patients and, consequently, reduce the likelihood of effective tumor control. In this context, delivering radiation at ultra-high dose rates (UHDR, > 40 Gy/s) is gaining increasing attention due to its potential to spare healthy tissues surrounding the tumor and to prevent radiation-induced side effects, as compared to conventional dose rates (CONV, on the order of Gy/min).The mechanism underlying this protective effect-termed the FLASH effect-remains elusive, driving intensive research to elucidate the biological processes triggered by this type of irradiation.In vitro models offer a valuable tool to support this research, allowing for the efficient screening of various beam parameters and biological responses in a time- and cost-effective manner. In this study, multicellular tumor spheroids and normal cells were exposed to proton irradiation at UHDR to evaluate its efficacy in controlling tumor growth and its cytotoxic impact on healthy tissues, respectively.We report that UHDR and CONV irradiation induced a comparable growth delay in 3D tumor spheroids, suggesting similar efficacy in tumor control. In normal cells, both dose rates induced similar levels of senescence; however, UHDR irradiation led to lower apoptosis induction at clinically relevant doses and early time points post-irradiation.Taken together, these findings further highlight the potential of UHDR irradiation to modulate the response of normal tissues while maintaining comparable tumor control.JuryProf. Thomas BALLIGAND (UNamur), PresidentProf. Stéphane LUCAS (UNamur), SecretaryProf. Carine MICHIELS (UNamur)Dr Sébastien PENNINCKX (Hôpital Universitaire de Bruxelles)Prof. Cristian FERNANDEZ (University of Bern)Dr Rudi LABARBE (IBA)

High-Sensitivity Birefringence Mapping Using Near-Circularly Polarized Light I will describe several techniques for mapping a two-dimensional birefringence distribution, which can be classified according to the optical schemes and principles of work:Illumination geometry (transmitted light/reflected light)Image acquisition (sequential acquisition/simultaneous acquisition)Polarization control (electrically controlled variable retardance/mechanical rotation).This classification facilitates a comparative analysis of the capabilities and limitations in these methods for birefringence characterization. Polychromatic polarizing microscopy (PPM) provides unique capabilities to alternative methods. It leverages vector interference to generate vivid, full-spectrum colors at extremely low retardances, down to < 10 nm. PPM is a significant departure from conventional polarizing microscopes that rely on Newton interference, which requires retardances above 400 nm for color formation. Furthermore, PPM's color output directly reflects the orientation of the birefringent material, a feature absent in conventional microscopy where color is solely determined by retardance.Joint seminar of ILEE & NISM!The seminar is open to external people too, no need to register. More info

For several years now, researchers have been striving to make their laboratories "greener". A series of actions have been implemented, funded by the CaNDLE 2023 call for projects have been supported by the Department of Biology at the initiative of Alison Forrester and Frédéric Silvestre, the project leaders, as well as by Campus Infrastructure Management Services (SIGeC) and Prevention Services (SerP). In March 2025, a Green Day was held to provide information on the project's progress, and to motivate people to join the initiative.