Saint-Étienne-de-Montluc – Industries lithiques du Paléolithique inférieur et moyen

Le site se trouve dans la nappe alluviale de Saint-Étienne-de-Montluc et se présente comme un ensemble superficiel alluvial sablo-argileux contenant silex et grès ladère topographiquement situé entre le Marais et le Sillon de Bretagne. Il recouvre localement un soubassement tertiaire. L’ensemble est enrichi d’altérites du socle et de matériaux de solifluxion. Le caractère torrentiel indiqué par les rognons de silex décimétriques et la présence de nombreux grains rond-mats, ainsi que celle de ..

Commune de Saint-Étienne-de-Montluc

Depuis octobre 2010, trente-trois nouveaux outils du site paléolithique inférieur de la nappe alluviale de Saint-Étienne-de-Montluc, attribuable sans doute au début du Pléistocène moyen, ont été soumis à l’expertise de Jean-Laurent Monnier. Ce corpus comprend neuf pièces provenant des sites déjà prospectés des Fontenelles, Sainte-Marie de l’Aunais/Barreau, l’Entermi et le Bel Ebat. À ceux-ci s’ajoutent deux pièces découvertes au lieu-dit Les Longs Prés, distant d’1 km de l’Entremi, révélant, ..

Mutations, inflammation and phenotype of myeloproliferative neoplasms

Knowledge on the myeloproliferative neoplasms (MPNs) – polycythemia vera (PV), essential thrombocythemia (ET), primary myelofibrosis (PMF) – has accumulated since the discovery of the JAK/STAT-activating mutations associated with MPNs: JAK2V617F, observed in PV, ET and PMF; and the MPL and CALR mutations, found in ET and PMF. The intriguing lack of disease specificity of these mutations, and of the chronic inflammation associated with MPNs, triggered a quest for finding what precisely determines that MPN patients develop a PV, ET or PMF phenoptype. The mechanisms of action of MPN-driving mutations, and concomitant mutations (ASXL1, DNMT3A, TET2, others), have been extensively studied, as well as the role played by these mutations in inflammation, and several pathogenic models have been proposed. In parallel, different types of drugs have been tested in MPNs (JAK inhibitors, interferons, hydroxyurea, anagrelide, azacytidine, combinations of those), some acting on both JAK2 and inflammation. Yet MPNs remain incurable diseases. This review aims to present current, detailed knowledge on the pathogenic mechanisms specifically associated with PV, ET or PMF that may pave the way for the development of novel, curative therapies

Towards Unclonable Cryptography in the Plain Model

By leveraging the no-cloning principle of quantum mechanics, unclonable cryptography enables us to achieve novel cryptographic protocols that are otherwise impossible classically. Two most notable examples of unclonable cryptography are copy-protection (CP) and unclonable encryption (UE). Most known constructions rely on the QROM (as opposed to the plain model). Despite receiving a lot of attention in recent years, two important open questions still remain: CP for point functions in the plain model, which is usually considered as feasibility demonstration, and UE with unclonable indistinguishability security in the plain model. A core ingredient of these protocols is the so-called monogamy-of-entanglement (MoE) property. Such games allow quantifying the correlations between the outcomes of multiple non-communicating parties sharing entanglement in a particular context. Specifically, we define the games between a challenger and three players in which the first player is asked to split and share a quantum state between the two others, who are then simultaneously asked a question and need to output the correct answer. In this work, by relying on previous works [CLLZ21, CV22], we establish a new MoE property for subspace coset states, which allows us to progress towards the aforementioned goals. However, it is not sufficient on its own, and we present two conjectures that would allow first to show that CP of point functions exists in the plain model, with different challenge distributions, and then that UE with unclonable indistinguishability security exists in the plain model. We believe that our new MoE to be of independent interest, and it could be useful in other applications as well. To highlight this last point, we leverage our new MoE property to show the existence of a tokenized signature scheme with a new security definition, called unclonable unforgeability.Comment: Added unclonable unforgeability for tokenized signature

Mediators of Inflammation in Myeloproliferative Neoplasms: State of the Art

International audienc

Développement d'une approche innovante de modélisation de la cinétique de décomposition thermique des matériaux solides en espaces confinés sous-ventilés. Application aux incendies en tunnel

Tunnel fires are severe phenomenon whose evolution, usually very fast, can lead to important damages to persons and properties. Tunnel fire safety is based on the use of empirical models, very simplified that describes the evolution of the fire kinetic. Nevertheless, these models does not take into account neither the type of material that are involved in the phenomenon, such as constitutive polymers of road vehicles nor their reactivity in solid phase (thermal decomposition). In order to provide an evolution of the fire description, function of the conditions usually encountered in a tunnel, a predictive model aiming to describe materials’ thermal decomposition has been developed. This mathematical model has been established on the basis of an experimental approach, at small scale, using the Controlled Atmosphere Cone Calorimeter coupled to a Fourier Transform Infrared Spectrometer. The thermal degradation of three different materials (Polyisocyanurate foam, Acrylonitrile Butadiene Styrene and Ethylene Propylene Diene Monomer) has been thoroughly assessed function of key parameters that drives the decomposition process during fire: oxygen concentration and heat flux imposed to the materials. Obtained results for the three materials have then been used to construct multifactorial polynomial regressions, using the methodology known as surface response methodology. The model allows defining the response of the decomposition kinetics (explained variable), function of both the oxygen concentration and the heat flux received at the surface of the material (explanatory variable). Comparisons between numerical and experimental obtained results show the relevance of this approach.Les incendies de tunnels sont des phénomènes violents, à l’évolution rapide qui engendrent la plupart du temps des dommages importants aux personnes et aux biens. La sécurité incendie dans les tunnels routiers est basée sur l’utilisation de modèles empiriques très simplifiés de description de l’évolution de la cinétique de développement de l’incendie. Ces modèles ne prennent cependant pas en compte le type de combustible impliqués dans le phénomène, tels que les polymères constitutifs des enveloppes des véhicules routiers, ni leurs réactivité en phase solide (décomposition thermique). Dans l’optique de faire évoluer la description de l’incendie en fonction des conditions ambiantes caractéristiques d’un tunnel, un modèle prédictif de la décomposition thermique des matériaux a été développé. Ce modèle mathématique a été construit sur la base d’une approche expérimentale à petite échelle faisant intervenir le dispositif du cône calorimètre à atmosphère contrôlée couplé à un spectromètre infrarouge à transformée de Fourrier. Trois matériaux ont fait l’objet d’une étude approfondie de leur décomposition thermique, en fonction de deux paramètres clés influençant la décomposition des solides lors d’un incendie de tunnel : la concentration d’oxygène ambiante et l’éclairement énergétique imposé aux matériaux. Les résultats obtenus pour les trois matériaux choisis (une mousse Polyisocyanurate, un Ethylène Propylène Diène Monomère et un Acrylonitrile Butadiène Styrène) ont été utilisés pour la construction de régressions polynomiales multifactorielles, méthode également connue sous le nom de méthodologie des surfaces de réponses.Le modèle permet de définir la réponse de la cinétique de décomposition (variable expliquée) et son évolution, en fonction de la concentration d’oxygène locale et de l’éclairement énergétique imposé à la surface d’un matériau (variables explicatives). La comparaison des résultats numériques et expérimentaux a alors montré la pertinence de ce type d’approch

A novel framework to study the evolution of crop rotation diversity reveals changes towards regional crop type specialisation in Sweden

Diversification of cropping systems can help decrease the negative environmental impacts of agriculture while increasing ecosystem service benefits to crop production. The crop diversification measure introduced by the 2013 CAP reform aimed to trigger the diversification of cropping systems. There is currently no framework to show how policies that aim to trigger diversification of cropping systems, affect crop rotation diversity at the field scale. In this study, we propose a framework to study the evolution of cropping system diversity, which comprises (1) building crop sequences for two periods using the Geo-spatial Application (GSA) database of the Integrated Administration and Control System (IACS), (2) calculating two indicators of diversity of crop sequences, (3) creating a typology of crop sequences, and (4) determining the significance of change and highlighting drivers of change by using mixed models. Our framework was tested on 1100,760 ha in Sweden, focusing on the periods 2005–2010 and 2011–2016, with four ways of categorizing crops (i.e., crop species, crop types, winter crops vs spring crops, botanical family) in five homogeneous production regions. Using different crop categorization is a way of expressing the robustness of the trends in diversity which account for various relationships among crops. We showed that the value of all diversity indicators in all regions decreased significantly between the two periods, except for the estimated agronomic quality of the crop sequence in the most productive regions where it increased. This general decrease could be explained by longer duration of rotational perennial leys and reduced cultivation of minor cereals, such as rye and oats in the later period. Overall, there was an 8 % increase in ley area, which was particularly evident in regions with less productive land, where the high proportion of ley often became permanent grassland. We found that the trend towards longer duration leys was strong in livestock farms, while regions with productive land favoured the inclusion of more annual cash crops in the rotation, especially oilseed rape, which contributed to the agronomic quality of the sequences. The framework could be widely adopted across Europe using the GSA database of the IACS to track diversification changes at a country and regional level and design appropriate policies to increase the diversity of crop rotations using the potential local drivers highlighted

Experimental in vitro transmission of Babesia sp. (EU1) by Ixodes ricinus

Babesia sp. (EU1), first characterized in 2003, has been implicated in human cases of babesiosis in Italy, Austria and Germany. It has been identified in roe deer and in its suspected tick vector, Ixodes ricinus, in several European countries. The aim of the present study was to validate the competence of I. ricinus as a vector of Babesia sp. (EU1) via experimental infections. For this purpose, a parasite strain isolated from roe deer was cloned in sheep erythrocytes. After experimental infections, parasite DNA was successfully amplified by PCR in both eggs and larvae originating from infected I. ricinus females and in the salivary glands of females exposed to Babesia sp. (EU1) as nymphs. We also demonstrate that infected females were able to transmit parasite DNA during a new blood meal. Together with previous epidemiological studies, these results validate I. ricinus as a competent vector for Babesia sp. (EU1)

Semi-Quantum Copy-Protection and More

Properties of quantum mechanics have enabled the emergence of quantum cryptographic protocols achieving important goals which are proven to be impossible classically. Unfortunately, this usually comes at the cost of needing quantum power from every party in the protocol, while arguably a more realistic scenario would be a network of classical clients, classically interacting with a quantum server. In this paper, we focus on copy-protection, which is a quantum primitive that allows a program to be evaluated, but not copied, and has shown interest especially due to its links to other unclonable cryptographic primitives. Our main contribution is to show how to dequantize existing quantum copy-protection from hidden coset states, by giving a construction for classically-instructed remote state preparation for coset states. We then apply this dequantizer to obtain semi-quantum cryptographic protocols for copy-protection and tokenized signatures with strong unforgeability. In the process, we present the first secure copy-protection scheme for point functions in the plain model and a new direct product hardness property of coset states which immediately implies a strongly unforgeable tokenized signature scheme