145 research outputs found
Ueber die comprimirte Luft : als universelle Triebkraft und unentgeldliches Ersatzmittel der Dampfkraft ...
No full textvon [Antoine] Andraud und [Cyprien M.] Tessié du Motay ..
Livres annoncés sommairement
No full textLeroux Alfred, Décans M., Pasquier Félix, Poupardin René, Prudhomme A., Dognon Paul, Bondurand Ed., Millardet Georges, Dutil Léon, Andraud Paul. Livres annoncés sommairement. In: Annales du Midi : revue archéologique, historique et philologique de la France méridionale, Tome 17, N°66, 1905. pp. 312-326
Livres annoncés sommairement
No full textLeroux Alfred, Décans M., Pasquier Félix, Poupardin René, Prudhomme A., Dognon Paul, Bondurand Ed., Millardet Georges, Dutil Léon, Andraud Paul. Livres annoncés sommairement. In: Annales du Midi : revue archéologique, historique et philologique de la France méridionale, Tome 17, N°66, 1905. pp. 312-326
Théâtre scientifique. Électricité. Galvani, drame en 5 actes... par M. Andraud
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On the origin of controlled anisotropic growth of monodisperse gold nanobipyramids
No full textWe elucidate the crucial role of the cetyl trimethylammonium bromide (CTAB) surfactant in the anisotropic growth mechanism of gold nano-bipyramids, nano-objects with remarkable optical properties and high tunability. Atomistic molecular dynamics simulations predict different surface coverages of the CTAB (positively charged) heads and their (bromide) counterions as function of the gold exposed surfaces. High concentration of CTAB surfactant promotes formation of gold nanograins in solution that work as precursors for the smooth anisotropic growth of more elongated nano-bipyramidal objects. Nanobipyramids feature higher index facets with respect to nanorods, allowing higher CTAB coverages that stabilize their formation and leading to narrower inter-micelles channels that smooth down their anisotropic growth. Absorption spectroscopy and scanning electron microscopy confirmed the formation of nanograins and demonstrated the importance of surfactant concentration on driving the growth towards nano-bipyramids rather than nanorods. The outcome explains the formation of the monodisperse bipyramidal nano-objects, the origin of their controlled shapes and sizes along with their remarkable stability
Projet de chemin de fer du Pecq à Poissy : présenté au gouvernement le 24 avril 1837 / par M. Andraud
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De l'air comprimé employé comme moteur, ou De la force obtenue gratuitement et mise en réserve / par M. Andraud
No full textContient une table des matièresAvec mode text
Ancient Greek text concealed on the back of unrolled papyrus revealed through shortwave-infrared hyperspectral imaging
No full textOnly a few Herculaneum rolls exhibit writing on their reverse side. Since unrolled papyri are permanently glued to paperboard, so far, this fact was known to us only from 18th-century drawings. The application of shortwave-infrared (SWIR; 1000-2500 nm) hyperspectral imaging (HSI) to one of them (PHerc. 1691/1021) has revealed portions of Greek text hidden on the back more than 220 years after their first discovery, making it possible to recover this primary source for the ongoing new edition of this precious book. SWIR HSI has produced better contrast and legibility even on the extensive text preserved on the front compared to former imaging of Herculaneum papyri at 950 nm (improperly called multispectral imaging), with a substantial impact on the text reconstruction. These promising results confirm the importance of advanced techniques applied to ancient carbonized papyri and open the way to a better investigation of hundreds of other such papyri
Ancient Greek text concealed on the back of unrolled papyrus revealed through Shortwave-Infrared Hyperspectral Imaging
No full textOnly a few Herculaneum rolls exhibit writing on their reverse side. Since unrolled papyri are permanently glued to paperboard, so far, this fact was known to us only from 18th-century drawings. The application of shortwave-infrared (SWIR; 1000-2500 nm) hyperspectral imaging (HSI) to one of them (PHerc. 1691/1021) has revealed portions of Greek text hidden on the back more than 220 years after their first discovery, making it possible to recover this primary source for the ongoing new edition of this precious book. SWIR HSI has produced better contrast and legibility even on the extensive text preserved on the front compared to former imaging of Herculaneum papyri at 950 nm (improperly called multispectral imaging), with a substantial impact on the text reconstruction. These promising results confirm the importance of advanced techniques applied to ancient carbonized papyri and open the way to a better investigation of hundreds of other such papyri
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