Search results for "STATES"
showing 10 items of 1532 documents
Defect-controlled hypersound propagation in hybrid superlattices
2013
We employ spontaneous Brillouin light scattering spectroscopy and detailed theoretical calculations to reveal and identify elastic excitations inside the band gap of hypersonic hybrid superlattices. Surface and cavity modes, their strength and anticrossing are unambiguously documented and fully controlled by layer thickness, elasticity, and sequence design. This new soft matter based superlattice platform allows facile engineering of the density of states and opens new pathways to tunable phoxonic crystals.
Quantizations from reproducing kernel spaces
2012
Abstract The purpose of this work is to explore the existence and properties of reproducing kernel Hilbert subspaces of L 2 ( C , d 2 z / π ) based on subsets of complex Hermite polynomials. The resulting coherent states (CS) form a family depending on a nonnegative parameter s . We examine some interesting issues, mainly related to CS quantization, like the existence of the usual harmonic oscillator spectrum despite the absence of canonical commutation rules. The question of mathematical and physical equivalences between the s -dependent quantizations is also considered.
Electronic and Magnetic Study of Polycationic Mn-12 Single-Molecule Magnets with a Ground Spin State S=11
2010
International audience; The preparation, magnetic characterization, and X-ray structures of two polycationic Mn-12 single-molecule magnets (Mn12O12(bet)(16)(EtOH)(4)](PF6)(14)center dot 4CH(3)CN center dot H2O (1) and [Mn12O12(bet)(16)(EtOH)(3)(H2O)](PF6)(13)(OH)center dot 6CH(3)CN center dot EtOH center dot H2O (2) (bet = betaine = (CH3)(3)N+-CH2-CO2-) are reported. 1 crystallizes in the centrosymmetric P2/cspace group and presents a (0:2:0:2) arrangement of the EtOH molecules in its structure. 2 crystallizes in the noncentrosymmetric P (4) over bar space group with two distinct Mn-12 polycations, [Mn12O12(bet)(16)(EtOH)(2)(H2O)(2)](14+) (2A) and [Mn12O12(bet)(16)(EtOH)(4)](14+)(2B) per un…
Harnessing the biodiversity value of Central and Eastern European farmland
2015
A large proportion of European biodiversity today depends on habitat provided by low‐intensity farming practices, yet this resource is declining as European agriculture intensifies. Within the European Union, particularly the central and eastern new member states have retained relatively large areas of species‐rich farmland, but despite increased investment in nature conservation here in recent years, farmland biodiversity trends appear to be worsening. Although the high biodiversity value of Central and Eastern European farmland has long been reported, the amount of research in the international literature focused on farmland biodiversity in this region remains comparatively ti…
Washington, une ville mondiale ?
2001
Washington DC is rarely mentioned in the scientific literature on world cities. However, its influence on the world economy is obvious (World Bank, IMF, Federal Reserve). As a new immigration center, Washington has grown rapidly into an international city. It is suggested that the concept of global city must be re-examined to propose a more flexible definition.
The rebirth of streetcars in the United-States and France
2014
International audience
La publicisation des liens entre l’antibiorésistance et l’alimentation dans la presse nationale étatsunienne
2020
Si le problème de la résistance des bactéries aux antibiotiques (antibiorésistance) est depuis longtemps connu dans le domaine scientifique, on assiste aujourd’hui à une phase de reconnaissance politique du problème. L’auteure analyse la publicisation des liens entre l’antibiorésistance et l’alimentation aux États-Unis. Cette étude s’inscrit dans une réflexion pragmatiste de constitution des problèmes publics et s’enrichit des outils issus de l’analyse de discours. Le corpus est constitué d’articles publiés dans deux titres de référence de la presse quotidienne étatsunienne et d’orientation politique différente, The New York Times et The Washington Post, entre 1984 et 2016. Although the sci…
Literature on the Move: Comparing Diasporic Ethnicities in Europe and the Americas
2002
Cet ouvrage rassemble une trentaine d'articles sur littérature et culture ethniques aux Etats-Unis et en Europe dans une perspective comparatiste.
“Indian Policy and the Political Paralysis of the 1850s”
1997
International audience
(De)constructing "America": the Case of Emir Kusturica's Arizona Dream (1993)
2010
International audience; By means of an analysis of Kusturica's only film about America, Arizona Dream, this article argues that while the United States offers a vision of a united society founded on diversity, it also represses, altering in the process both society and the landscape. National unity is consequently a dream – a dream the film suggests that has often been dreamed up by un-Americans. Filtered through Kusturica's own perceptions of America – and his position on the Balkan War (1991-2001) – the film seems to suggest sadness at the loss of a multi-ethnic, multi-cultural perspective. Through its representations of geography and ethnic diversity, and its dense network of filmic cita…