$S$-adic conjecture and Bratteli diagrams

in Comptes Rendus. Mathématique (2012), 350(21-22), 979--983

S'européaniser par le football? L'espace sportif transfrontalier au nord-est de la France (1919-1939)

in Gasparini, William (Ed.) L'Europe du football: Socio-histoire d'une construction européenne (2017)

An S-adic characterization of minimal subshifts with first difference of complexity 1 ≤ p(n + 1) - p(n) ≤ 2

in Discrete Mathematics and Theoretical Computer Science (2014), 16(1), 233--286

In [Ergodic Theory Dynam. System, 16 (1996) 663–682], S. Ferenczi proved that any minimal subshift with first difference of complexity bounded by 2 is S-adic with Card(S)≤ 3^27. In this paper, we improve ... [more ▼]

In [Ergodic Theory Dynam. System, 16 (1996) 663–682], S. Ferenczi proved that any minimal subshift with first difference of complexity bounded by 2 is S-adic with Card(S)≤ 3^27. In this paper, we improve this result by giving an S-adic charaterization of these subshifts with a set S of 5 morphisms, solving by this way the S-adic conjecture for this particular case. [less ▲]

The S-adic conjecture: general case and complexity 2n

Scientific Conference (2010, December)

S-GHOST city: Self-Generating Housing, Open Space and Transportation in the city

Scientific Conference (2008)

S-Graphs+: Real-time Localization and Mapping leveraging Hierarchical Representations

E-print/Working paper (2022)

In this paper, we present an evolved version of the Situational Graphs, which jointly models in a single optimizable factor graph, a SLAM graph, as a set of robot keyframes, containing its associated ... [more ▼]

In this paper, we present an evolved version of the Situational Graphs, which jointly models in a single optimizable factor graph, a SLAM graph, as a set of robot keyframes, containing its associated measurements and robot poses, and a 3D scene graph, as a high-level representation of the environment that encodes its different geometric elements with semantic attributes and the relational information between those elements. Our proposed S-Graphs+ is a novel four-layered factor graph that includes: (1) a keyframes layer with robot pose estimates, (2) a walls layer representing wall surfaces, (3) a rooms layer encompassing sets of wall planes, and (4) a floors layer gathering the rooms within a given floor level. The above graph is optimized in real-time to obtain a robust and accurate estimate of the robot's pose and its map, simultaneously constructing and leveraging the high-level information of the environment. To extract such high-level information, we present novel room and floor segmentation algorithms utilizing the mapped wall planes and free-space clusters. We tested S-Graphs+ on multiple datasets including, simulations of distinct indoor environments, on real datasets captured over several construction sites and office environments, and on a real public dataset of indoor office environments. S-Graphs+ outperforms relevant baselines in the majority of the datasets while extending the robot situational awareness by a four-layered scene model. Moreover, we make the algorithm available as a docker file. [less ▲]

s. v. Lady Diana

in Wodianka, Stephanie; Ebert, Juliane (Eds.) Metzler Lexikon moderner Mythen: Figuren, Konzepte, Ereignisse (2014)

S100A8/A9 AND MIR-132-5P: TWO KEY PLAYERS IN THE REGULATION OF CA2+-DEPENDENT CYTOKINE SECRETION IN NEUTROPHILS

Doctoral thesis (2022)

Neutrophils are important actors of the immune system, particularly through the release of cytokines in the inflammatory environment. This process must be highly orchestrated to avoid cell overactivation ... [more ▼]

Neutrophils are important actors of the immune system, particularly through the release of cytokines in the inflammatory environment. This process must be highly orchestrated to avoid cell overactivation and unwanted tissue damage. However, this elegant regulation is still only partially known and poorly characterized. Increasing evidence over the years show that Ca2+ is actively involved in cytokine secretion but our knowledge on the relationship between these two phenomena needs to be filled. To this end, in this study, we investigated the Ca2+-dependent mechanisms underlying cytokine secretion in neutrophils. For that, the differentiated myeloid cell line HL-60 (dHL-60) was used as a cell model since primary neutrophils are unable to be genetically modified. Our results showed that the mobilization of several cytokines, notably IL-8, was up-regulated in a time-dependent manner by a pro-inflammatory stimulus (fMLF). Experiments of intracellular flow cytometry staining provided evidence on the presence of preformed IL-8 as well as de novo synthesis of IL-8. Changes in intracellular Ca2+ levels, resulting from an extracellular Ca2+ entry, is shown to be indispensable for efficient secretion of CCL2, CCL3, CCL4 and IL-8, even if an additional signal appears to be required for the release of IL-8. Ca2+-dependent cytokine secretion was associated to the store-operated Ca2+ entry (SOCE) mechanism and probably relies on the Ca2+ sensor STIM1. Since Ca2+-binding proteins S100A8/A9 have been previously reported to be key actors in the regulation of neutrophil NADPH oxidase activation, we hypothesized that Ca2+ signals could be converted into cytokine secretion through intracellular S100A8/A9. Knockdown studies performed in mouse (Hoxb8 cells) and human (dHL-60) neutrophil models confirmed the involvement of S100A8/A9 in the regulation of cytokine secretion. Moreover, our data support the fact that a part of cytokine secretion occurs through the degranulation process. Finally, we investigated the post-transcriptional mechanism involved in the regulation of S100A8/A9 expression and thus, in the control of cytokine secretion. Based on prediction network analysis, miR-132-5p was identified as a potential regulator of S100A8/A9. Stable overexpression of miR-132-5p in dHL-60 cells caused a strong inhibition of S100A8/A9 expression and IL-8 secretion underlining the preponderant role of miR-132-5p-regulated S100A8/A9 expression in the pro-inflammatory response. To summarize, for the first time, we prove that Ca2+-dependent cytokine secretion is associated with SOCE and is regulated by intracellular S100A8/A9, which is negatively modulated by miR-132-5p to prevent excessive neutrophil activation and host damage. [less ▲]

Sa-TikZ: a library to draw switching architectures

in Ars TeXnica (2013), 15

The article illustrates how it is possible to draw some types of switching architectures in a simple manner. The Sa-TikZ library provides not only the keys devoted to the drawing part, but also the keys ... [more ▼]

The article illustrates how it is possible to draw some types of switching architectures in a simple manner. The Sa-TikZ library provides not only the keys devoted to the drawing part, but also the keys devoted to customize the aspect of the architectures in the spirit of the TikZ syntax. [less ▲]

Saar-Lor-Lux - Die Bedeutung der lokalen grenzüberschreitenden Kooperation für den europäischen Integrationsprozeß.

in Magazin Forschung (1997), (1), 46-53