Search results for "Lier"
showing 10 items of 906 documents
Ultraviolet generation in periodically poled Lithium Tantalate waveguides
2008
We demonstrate ultraviolet generation in lithium tantalate channel waveguides for frequency doubling via quasi-phase-matching. The samples, proton exchanged and nanostructured by electric-field assisted surface periodic poling with domains as deep as 40 μm, yield continuous wave light at 365.4 nm with conversion efficiencies larger than 7.5% W-1 cm-2.
Soft proton exchanged channel waveguides in congruent lithium tantalate for frequency doubling
2010
We report on stable optical waveguides fabricated by soft-proton exchange in periodically-poled congruent lithium tantalate in the a-phase. The channel waveguides are characterized in the telecom wavelength range in terms of both linear properties and frequency doubling. The measurements yield a nonlinear coefficient of about 9.5pm/V, demonstrating that the nonlinear optical properties of lithium tantalate are left nearly unaltered by the process. (C) 2010 Optical Society of America
Acoustic and optical variations during rapid downward motion episodes in the deep north-western Mediterranean Sea
2011
An Acoustic Doppler Current Profiler (ADCP) was moored at the deep-sea site of the ANTARES neutrino telescope near Toulon, France, thus providing a unique opportunity to compare high-resolution acoustic and optical observations between 70 and 170 m above the sea bed at 2475 m. The ADCP measured downward vertical currents of magnitudes up to 0.03 m s-1 in late winter and early spring 2006. In the same period, observations were made of enhanced levels of acoustic reflection, interpreted as suspended particles including zooplankton, by a factor of about 10 and of horizontal currents reaching 0.35 m s-1. These observations coincided with high light levels detected by the telescope, interpreted …
Time calibration of the ANTARES neutrino telescope
2011
The ANTARES deep-sea neutrino telescope comprises a three-dimensional array of photomultipliers to detect the Cherenkov light induced by upgoing relativistic charged particles originating from neutrino interactions in the vicinity of the detector. The large scattering length of light in the deep sea facilitates an angular resolution of a few tenths of a degree for neutrino energies exceeding 10 TeV. In order to achieve this optimal performance, the time calibration procedures should ensure a relative time calibration between the photomultipliers at the level of ~1 ns. The methods developed to attain this level of precision are described.
ANTARES: The first undersea neutrino telescope
2011
The ANTARES Neutrino Telescope was completed in May 2008 and is the first operational Neutrino Telescope in the Mediterranean Sea. The main purpose of the detector is to perform neutrino astronomy and the apparatus also offers facilities for marine and Earth sciences. This paper describes the design, the construction and the installation of the telescope in the deep sea, offshore from Toulon in France. An illustration of the detector performance is given. © 2011 Elsevier B.V. All rights reserved.
Computational methods for optimal shakedown design of FE structures
1998
The paper concerns the optimal shakedown design of structures discretized by elastic perfectly plastic finite elements. The design problem is formulated in four alternative versions, i.e. as the search for the minimum volume design whose shakedown limit load multiplier is assigned or as the search for the maximum shakedown limit load multiplier design whose volume is assigned; both problems are approached on the grounds of the shakedown lower bound and upper bound theorems. Correspondingly four computational methods, one for each original problem, are presented. These methods consist in solving iteratively new problems which are simpler than the original ones, but expressed in such a way th…
Optimization of continuous elastic perfectly plastic beams
2004
Abstract The optimal design of elastic plastic beams subjected to loads quasi-statically variable within a given domain is studied. A minimum volume formulation and a maximum load multiplier formulation are developed, both expressed on the grounds of a statical as well as of a kinematical approach. The search problems are formulated according to three different limiting criteria acting simultaneously. For each criterion a corresponding selected safety factor is imposed. The Euler–Lagrange equations related to the above described problems are deduced. A special iterative technique devoted to the solution of the above referenced problems is proposed. Some numerical examples conclude the paper.
L’église de Saint-Antoine à l’aune de nouvelles hypothèses. Le chevet de l’église de Saint-Antoine (XIIe-XIIIe siècle)
2016
Géraldine Mocellin, Nicolas Reveyron (dir.), Bâtisseurs d’Éternité, catalogue d'exposition Musée départemental de Saint-Antoine-l’Abbaye (10 juillet-9 octobre 2016), Grenoble : Département de l’Isère ; Saint-Antoine-l’Abbaye : Musée de Saint-Antoine-l’Abbaye, 2016, pp. 116-118
Probabilités d’orientation déjouées par le sport : le cas des étudiantes à l’université
2022
Introduction En 2020, les femmes restent sous-représentées dans le monde du sport, aussi bien parmi les pratiquantes, plus encore parmi les sportives de haut niveau, les dirigeantes et présidentes de fédérations sportives. Dans ce contexte, la dimension sportive des étudiantes à l’université leur confère un profil « atypique ». Les unes choisissent le domaine d’étude dédié aux métiers du sport, les STAPS (sciences et techniques des activités physiques et sportives), représentant le tiers des ...
Vizi privati e pubbliche virtù dei Gerosolimitani di Corleone tra XIV e XV secolo
2018
Il contributo esamina il ruolo degli Ospedalieri a Corleone, grosso centro agricolo della Sicilia, tra l'inchiesta papale del 1373 e la morte del precettore Antonio Taberna (1419). Nel decennio 1378-1388 esponenti di ricche famiglie furono sepolti a S. Giovanni, lasciarono denaro, commissionarono oggetti sacri , dipinti e Bianca de Brancaccio costruì un nuovo ospedale. Il precettore Ruggero Vaccarella migliorò le finanze, ma nel 1399 fu sostituito con Antonio Traversa, esponente di una nota famiglia messinese. Il nuovo precettore si occupò dei beni dell'ordine e rimase in carica fino alla morte, nonostante lo stupro di una fanciulla. This work examines the role of the Hospitallers in Corleo…