713 research outputs found

    Draft Genome Sequences of Salmonella enterica subsp. enterica Serovar Dublin Strains from St. Nectaire and Morbier Cheeses Characterized by Multilocus Variable-Number Tandem-Repeat Analysis Profiles Associated with Two Fatal Outbreaks in France

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    We report here the draft genome sequences of 2 Salmonella enterica subsp. enterica serovar Dublin strains from St. Nectaire and Morbier cheeses having multilocus variable-number tandem-repeat analysis (MLVA) profiles identified during the fatal outbreaks that occurred in France in 2012 and 2015 to 2016, respectively. These draft genome sequences will help uncover the virulence determinants in invasive S. Dublin

    Radar High Resolution Range & Micro-Doppler Analysis of Human Motions

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    In radar imaging it is well known that relative motion or deformation of parts of illuminated objects induce additional features in the Doppler frequency spectra. These features are called micro-Doppler effect and appear as sidebands around the central Doppler frequency. They can provide valuable information about the structure of the moving parts and may be used for identification purposes [1]. Previous papers have mostly focused on ID micro-Doppler analysis [2-4]. In this paper, we propose to emphasize the analysis of such "non stationary targets" using a 2D imaging space, using both the micro-Doppler and a high range resolution analysis. As in 2D-ISAR imaging, range separation enables us to better discriminate the various effects caused by the time varying reflectors. We will focus our study on human motion. We will see how micro-Doppler signature can be used to extract information on pedestrians gait. We will show examples on simulated and experimental data

    Whole genome sequences of two Salmonella Dublin strains harbour viaA, viaB and ompB loci of the Vi antigen

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    Here we report the genome sequence of two Salmonella enterica serovar Dublin, 03EB8736SAL and 03EB8994SAL, isolated from raw milk cheese and filter of milk respectively. Analysis of draft genomes of the two isolates reveals the presence of viaA, viaB and ompB loci of the Vi capsular polysaccharide antigen (Vi antigen)

    Structural determination of bilayer graphene on SiC(0001) using synchrotron radiation photoelectron diffraction

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    In recent years there has been growing interest in the electronic properties of 'few layer' graphene films. Twisted layers, different stacking and register with the substrate result in remarkable unconventional couplings. These distinctive electronic behaviours have been attributed to structural differences, even if only a few structural determinations are available. Here we report the results of a structural study of bilayer graphene on the Si-terminated SiC(0001) surface, investigated using synchrotron radiation-based photoelectron diffraction and complemented by angle-resolved photoemission mapping of the electronic valence bands. Photoelectron diffraction angular distributions of the graphene C 1s component have been measured at different kinetic energies and compared with the results of multiple scattering simulations for model structures. The results confirm that bilayer graphene on SiC(0001) has a layer spacing of 3.48 Å and an AB (Bernal) stacking, with a distance between the C buffer layer and the first graphene layer of 3.24 Å. Our work generalises the use of a versatile and precise diffraction method capable to shed light on the structure of low-dimensional materials

    Potts models in the continuum. Uniqueness and exponential decay in the restricted ensembles

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    In this paper we study a continuum version of the Potts model. Particles are points in R^d, with a spin which may take S possible values, S being at least 3. Particles with different spins repel each other via a Kac pair potential. In mean field, for any inverse temperature there is a value of the chemical potential at which S+1 distinct phases coexist. For each mean field pure phase, we introduce a restricted ensemble which is defined so that the empirical particles densities are close to the mean field values. Then, in the spirit of the Dobrushin Shlosman theory, we get uniqueness and exponential decay of correlations when the range of the interaction is large enough. In a second paper, we will use such a result to implement the Pirogov-Sinai scheme proving coexistence of S+1 extremal DLR measures.Comment: 72 pages, 1 figur

    The oldest Camelidae (Mammalia, Artiodactyla) of Africa : new finds from the Mio-Pliocene boundary,Chad

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    Un fragment de mandibule et deux métapodes complets provenant du secteur fossilifère de Kossom Bougoudi (KB3 et KB26), Nord Tchad sont décrits. Une étude comparative permet d’attribuer les spécimens à Paracamelus gigas. Le degré évolutif des spécimens est compatible avec l’âge biochronologique des sites KB, proche de la limite Mio-Pliocène (ca 5 Ma). Les témoins les plus anciens du genre sont connus dans le Miocène supérieur d’Asie et d’Europe. Les restes tchadiens sont donc les plus anciens du continent attribués au genre

    Coexistence of ordered and disordered phases in Potts models in the continuum

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    This is the second of two papers on a continuum version of the Potts model, where particles are points in Rd\mathbb R^d, d≥2d\ge 2, with a spin which may take S≥3S\ge 3 possible values. Particles with different spins repel each other via a Kac pair potential of range \ga^{-1}, \ga>0. In this paper we prove phase transition, namely we prove that if the scaling parameter of the Kac potential is suitably small, given any temperature there is a value of the chemical potential such that at the given temperature and chemical potential there exist S+1S+1 mutually distinct DLR measures.Comment: 57 pages, 1 figur
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