La clientèle de l’architecte Barry Dierks sur la Côte d’Azur

Architecte américain formé au Carnegie Institute of Technology de Pittsburgh, Barry Dierks (1899-1960) a passé toute sa carrière sur la Côte d’Azur à partir de 1925. Il y construisit la maison qui devait être sa résidence, son agence et sa vitrine. Il a su, avec son ami anglais Eric Sawyer, capter l’intérêt d’une clientèle internationale, exigeante, cultivée et informée, venue chercher sur cette côte à la fois le dépaysement et des résonances à sa propre culture, mais pas forcément des réalisations d’avant-garde. Barry Dierks a su y répondre et se muer en architecte à la fois moderne et méditerranéen en se coulant sans se renier dans les desiderata de ses clients. La Seconde Guerre mondiale a interrompu ses activités. Mais ses actions humanitaires et leur engagement pendant cette période leur valut à tous deux respect et reconnaissance. Une centaine de chantiers ont pu être identifiés, grandes et petites maisons, pavillons de bain et même un bowling privé

COSIMA-Rosetta calibration for in-situ characterization of 67P/Churyumov-Gerasimenko cometary inorganic compounds

20 pages, 3 figures, 5 tablesInternational audienceCOSIMA (COmetary Secondary Ion Mass Analyser) is a time-of-flight secondary ion mass spectrometer (TOF-SIMS) on board the Rosetta space mission. COSIMA has been designed to measure the composition of cometary dust grains. It has a mass resolution m/{\Delta}m of 1400 at mass 100 u, thus enabling the discrimination of inorganic mass peaks from organic ones in the mass spectra. We have evaluated the identification capabilities of the reference model of COSIMA for inorganic compounds using a suite of terrestrial minerals that are relevant for cometary science. Ground calibration demonstrated that the performances of the flight model were similar to that of the reference model. The list of minerals used in this study was chosen based on the mineralogy of meteorites, interplanetary dust particles and Stardust samples. It contains anhydrous and hydrous ferromagnesian silicates, refractory silicates and oxides (present in meteoritic Ca-Al-rich inclusions), carbonates, and Fe-Ni sulfides. From the analyses of these minerals, we have calculated relative sensitivity factors for a suite of major and minor elements in order to provide a basis for element quantification for the possible identification of major mineral classes present in the cometary grains

Molecular excitation in the Interstellar Medium: recent advances in collisional, radiative and chemical processes

We review the different excitation processes in the interstellar mediumComment: Accepted in Chem. Re

Aujourd'hui le Moyen Age, archéologie et vie quotidienne en France Méridionale

[catalogue d'exposition], 1981-1983, Sénanque, Marseille, Arles, Toulon, Perpignan, Montpellier, Nice, GapInternational audienceCe catalogue d’exposition itinérante, fait la synthèse des principaux travaux du Laboratoire d’Archéologie Médiévale Méditerranéenne d’Aix-en-Provence (URA 6 du CRA CNRS) en 1981 réunis par l’équipe de Gabrielle Démians d’Archimbaud. L’habitat, les gestes de la vie quotidienne, le commerce et l’artisanat sont illustrés par les fouilles effectuées dans le Midi de la France, par de nombreux objets, en céramique, verre, pierre, os et métal ainsi que par les sources écrites, et les analyses de laboratoire, innovantes à cette époque

Carbon-rich dust in comet 67P/Churyumov-Gerasimenko measured by COSIMA/Rosetta

Cometary ices are rich in CO2, CO and organic volatile compounds, but the carbon content of cometary dust was only measured for the Oort Cloud comet 1P/Halley, during its flyby in 1986. The COmetary Secondary Ion Mass Analyzer (COSIMA)/Rosetta mass spectrometer analysed dust particles with sizes ranging from 50 to 1000 μm, collected over 2 yr, from 67P/Churyumov-Gerasimenko (67P), a Jupiter family comet. Here, we report 67P dust composition focusing on the elements C and O. It has a high carbon content (atomic |${\rm{C}}/{\rm{Si}} = 5.5{\rm{\ }}_{ - 1.2}^{ + 1.4}\ \ {\rm{on\ average}}$ |⁠) close to the solar value and comparable to the 1P/Halley data. From COSIMA measurements, we conclude that 67P particles are made of nearly 50 per cent organic matter in mass, mixed with mineral phases that are mostly anhydrous. The whole composition, rich in carbon and non-hydrated minerals, points to a primitive matter that likely preserved its initial characteristics since the comet accretion in the outer regions of the protoplanetary disc.</p

Nitrogen-to-carbon atomic ratio measured by COSIMA in the particles of comet 67P/Churyumov–Gerasimenko

The COmetary Secondary Ion Mass Analyzer (COSIMA) on board the Rosetta mission has analysed numerous cometary dust particles collected at very low velocities (a few m s−1) in the environment of comet 67P/Churyumov–Gerasimenko (hereafter 67P). In these particles, carbon and nitrogen are expected mainly to be part of the organic matter. We have measured the nitrogen-to-carbon (N/C) atomic ratio of 27 cometary particles. It ranges from 0.018 to 0.06 with an averaged value of 0.035 ± 0.011. This is compatible with the measurements of the particles of comet 1P/Halley and is in the lower range of the values measured in comet 81P/Wild 2 particles brought back to Earth by the Stardust mission. Moreover, the averaged value found in 67P particles is also similar to the one found in the insoluble organic matter extracted from CM, CI and CR carbonaceous chondrites and to the bulk values measured in most interplanetary dust particles and micrometeorites. The close agreement of the N/C atomic ratio in all these objects indicates that their organic matters share some similarities and could have a similar chemical origin. Furthermore, compared to the abundances of all the detected elements in the particles of 67P and to the elemental solar abundances, the nitrogen is depleted in the particles and the nucleus of 67P as was previously inferred also for comet 1P/Halley. This nitrogen depletion could constrain the formation scenarios of cometary nuclei.</p

L'habitat traditionnel dans la vallée de la Clarée (Briançonnais)

Fray François. L'habitat traditionnel dans la vallée de la Clarée (Briançonnais). In: Le Monde alpin et rhodanien. Revue régionale d'ethnologie, n°1-2/1978. pp. 203-246

Les maisons de Puy-Saint-André et Puy-Saint-Pierre et leurs accès

Fray François. Les maisons de Puy-Saint-André et Puy-Saint-Pierre et leurs accès. In: Le Monde alpin et rhodanien. Revue régionale d'ethnologie, n°4/1983. L'architecture rurale dans les Hautes-Alpes. Champsaur, Briançonnais, sous la direction de Jean Guibal. pp. 97-120

Historia pintoresca de las cruzadas

Fr. Antonio del Castillo tomado de la p. 154Las h. de lam. son calc.: "Rouarge sculp., Steniheil priuxit Geoffroy Sculp., David priuxit Revel Sculp, Aubert sc., Schoeder sc., Steinheil priuxit Sisco sc., Colin sculp., Nap. Thomas priuxit Revel sculp., Le Peti

Refractory organic matter of comets as an origin of extended sources: laboratory experiments to understand observations

International audienc