Analyser et représenter le rythme : étude exploratoire sur le transfert rythmique acoustique et gestuel d’apprenants malaisophones en FLE

International audienc

Livre de la Nature, Nature du livre : Pratiques des femmes botanistes

International audienc

Positionnement d'un robot parallèle à câbles avec une précision supérieure à 250 μm à l'aide de systèmes de mesure par multilatération et photogrammétrie

International audienceImproving the positioning accuracy of cable-driven parallel robots (CDPRs) is crucial for industrial applications. These robots, operating in large volumes and handling heavy loads, have an accuracy limited by several factors, such as variations in ambient temperature or changes of the load being transported, which affect the mechanical structure of the robot or the tensions in the cables. For instance, CoGiRo is a CDPR of dimensions of 11 m × 15 m × 6 m able to move a platform weighing up to 500 kg. Its resolution is a few tens of micrometres, but its positioning, estimated from the winch encoders, lacks accuracy. To accurately place the CoGiRo mobile platform in the desired position and orientation, this paper proposes to use multilateration and photogrammetric measurement systems in a collaborative way. Photogrammetry continuously measured the poses of the mobile platform with worst-case coordinate uncertainties in the depth direction moving away from the cameras, with 0.2 mm being typical for all lines of sight, dropping to 0.5 mm where lines of sight were blocked by occlusion. The photogrammetric system reported poses at 2 Hz to the multilateration system, enabling it to align its stations on the distant targets and measure static poses of the platform with an estimated uncertainty typically less than 70 µm for the position coordinates and less than 110 µrad for the orientation angles. Multilateration measurements were then used by CoGiRo to reduce its positioning errors to less than 250 µm. The technique was validated using a practical assembly of two square-shaped metallic parts equipped with 10 independent capacitive distance sensors that allowed us to demonstrate part alignment to better than 250 µm

Brasília versus Cidade Livre. Le mythe de la modernité urbaine au prisme de l’ordinaire chez João Almino

International audienceThis text invites us to decipher an exceptional world halfway between the extraordinaryand ambitious project of a city and society, Brasília, and the ordinary daily life experienced on its margins (Cidade Livre). The aim is to show how João Almino'snovel (Hôtel Brasília) manages to capture a socio-spatial reality with a strong historicalcontent, reflecting an ideological stance and embodying an extraordinary politicalorientation, in order to deliver an enhanced version that draws on memory and emotion. It is precisely here that a proximity is sought in order to anchor the power of a capital city's destiny in the ordinary daily life of an improvised city. The analysis itself, inspired by geocriticism, focuses on the close relationship between reality and fiction.</div

De la trace à l’empreinte éducative : positionnement en contexte de transition

International audienc

Volontourisme

International audienc

Notre « escape game » de sensibilisation aux papillomavirus humains

International audienceHuman papillomavirus (HPV) infections are responsible for more than 6,400 cases of cancer each year in France (National Cancer Institute (INCa), 2024). However, vaccination coverage remains insufficient: 47.8% among 15-year-old girls and 13.9% among boys (Santé publique France, 2025), contrary to the objectives of the ten-year strategy to combat cancer (INCa, 2021), which aims for 80% coverage by 2030. In areas marked by social, cultural, and territorial inequalities, there are many obstacles: lack of knowledge, mistrust, and taboos (Drouot, 2019). This proposal presents a fun intervention co-developed to overcome these obstacles and is part of a population health intervention research (PHIR) approach.Method: Between 2022 and 2025, an escape game to raise awareness of HPV vaccination was designed through a participatory approach involving researchers in information and communication sciences (ICS), game design and sociology, professionals from the CRCDC-OC, and young people aged 16 to 21. Three types of data were used: focus groups, semi-structured interviews and user tests with students; co-design workshops with professionals; and in situ observations. The scenario includes a game phase followed by an intervention by a health professional (Chabrier et al., 2019).Results: The game, which lasts 30 minutes, was tested in middle schools and high schools. According to our results, it improves understanding of HPV, reduces psychological barriers, and facilitates dialogue. Feedback from stakeholders highlights its potential to engage audiences who are not reached by traditional institutional channels (posters, conferences, flyers) (Blanié, 2022).Conclusion: This intervention illustrates the benefits of RISP: localized, co-constructed action tailored to specific audiences. It opens up prospects for longitudinal evaluation and transferability to other contexts. The playful approach is in line with health communication work on engagement through play (Alvarez &amp; Djaouti, 2012; Chabert, Desmarais, &amp; Ibanez-Bueno, 2010)Key messages: Escape games can be used to increase acceptance of HPV vaccination among young people in socially disadvantaged contexts. Co-constructed and transferable, they are fully in line with the logic of interventional research in population health.Les infections à papillomavirus humains (HPV) sont responsables de plus de 6 400 cas de cancers chaque année en France (Institut national du cancer (INCa), 2024). Pourtant, la couverture vaccinale reste insuffisante : 47,8 % chez les filles de 15 ans et 13,9 % chez les garçons (Santé publique France, 2025), contrairement aux objectifs de la stratégie décennale de lutte contre les cancers (INCa, 2021) visant une couverture de 80 % à l’horizon 2030. Dans les territoires marqués par des inégalités sociales, culturelles et territoriales, les freins sont multiples : méconnaissance, défiance, tabous (Drouot, 2019). Cette proposition présente une intervention ludique co-construite pour lever ces freins et s’inscrit dans une logique de recherche interventionnelle en santé des populations (RISP).Méthode : Entre 2022 et 2025, un escape game de sensibilisation à la vaccination anti-HPV a été conçu via une démarche participative impliquant chercheurs en sciences de l’information et de la communication (SIC), game design et sociologie, professionnels du CRCDC-OC , et jeunes de 16 à 21 ans. Trois types de données ont été mobilisées : focus groupes, entretiens semi-directifs et tests utilisateurs auprès d’élèves ; ateliers de co-design avec les professionnels ; observations in situ. Le scénario intègre une phase de jeu suivie d’une intervention d’un professionnel de santé (Chabrier et al., 2019).Résultats : Le jeu, d’une durée de 30 minutes, a été testé dans des collèges et lycées. D’après nos résultats, il améliore la compréhension du HPV, réduit les freins psychologiques et facilite le dialogue. Les retours des acteurs soulignent son potentiel de mobilisation pour des publics éloignés des canaux institutionnels classiques (affiches, conférences, flyers) (Blanié, 2022).Conclusion : Cette intervention illustre les apports de la RISP : action située, co-construite, adaptée à des publics spécifiques. Elle ouvre des perspectives d’évaluation longitudinale et de transférabilité dans d’autres contextes. L’approche ludique s’inscrit dans les travaux de communication en santé sur l’engagement par le jeu (Alvarez &amp; Djaouti, 2012 ; Chabert, Desmarais, &amp; Ibanez‑Bueno, 2010)Messages principaux : L’escape game permet de renforcer l’adhésion à la vaccination anti-HPV auprès de jeunes en contexte d’inégalités sociales. Co-construit et transférable, il s’inscrit pleinement dans une logique de recherche interventionnelle en santé des populations

Trajectoires complexes des mobilisations face aux dépossessions foncières dans l’espace périurbain de Dakar (Sénégal)

International audienceThis article discusses the trajectories of protest movements in the outskirts of Dakar (Senegal), where changes in land use often lead to land dispossession. The land administration allocates land to private actors without always taking into account previous owners or occupants, whether villagers or city dwellers. The latter may then fight back to retain control over the land. Based on the experiences of two collectives, the article analyses the open resistance and struggles that are taking place, which sometimes delay eviction decisions, causing the protests to shift into a more discreet phase. The victims of these evictions seek to shed light on the shortcomings at the heart of land conversions in order to take legal action, which in turn pushes private actors to try to circumvent the resistance.Cet article aborde les trajectoires des mobilisations dans la périphérie de Dakar (Sénégal) où les changements d’usage des terres provoquent souvent des dépossessions foncières. L’administration domaniale attribue en effet des terrains à des acteurs privés, mais sans toujours tenir compte des propriétaires ou des occupants antérieurs, villageois ou citadins. Ces derniers peuvent alors riposter pour garder leur contrôle sur la terre. À partir des expériences de deux collectifs, l’article analyse la résistance ouverte et les luttes qui ont lieu et qui reportent parfois les décisions d’éviction, faisant alors basculer les mobilisations dans une phase plus discrète. Les victimes de ces évictions cherchent de cette manière à jeter toute la lumière sur les manquements qui sont au cœur des conversions foncières dans le but d’intenter des actions en justice, ce qui pousse en retour les acteurs privés à tenter de contourner les résistances

Fallow land simulations to fight against soil degradation: Engaging stakeholders with model exploration

Source Agritrop Cirad (https://agritrop.cirad.fr/616636/) * Autres projets (id;sigle;titre): AF 1802-001;DSCATT;(FRA) Dynamics of Soil Carbon Sequestration in Tropical and Temperate Agricultural systems//International audienceThis methodological paper forms part of a modelling approach conducted in the Senegalese groundnut basin. It addresses two key aspects: (1) the process of co-constructing the model with local stakeholders; and (2) the use of calibration to account for non-measurable elements, which stakeholders needed to describe and evaluate their system effectively. Thematically, the study examines the relationship between social solidarity and agro-pastoral systems in Diohine, a Senegalese village where communal fallow lands are a vital indicator of socio-ecological resilience. Using the co-constructed, agent-based "Me re Diam" model, we examine the dynamics of soil fertility, population growth and agricultural yields over a 25-year period, integrating local knowledge and ecological data. Our findings emphasise the pivotal role of social solidarity mechanisms, such as parcel lending and food sharing, in stabilising agro-pastoral systems amidst resource scarcity. Calibrating the model demonstrates its ability to reproduce historical dynamics and test alternative practices. Without these mechanisms, the system collapses, revealing their indispensable nature for long-term sustainability. This work emphasises the importance of collaborative modelling in bridging the gap between empirical data and local practices, providing actionable insights for addressing soil degradation and demographic pressures