Search results for "nuit"
showing 10 items of 553 documents
La nuit étoilée : cœur ou marge du tourisme durable ? Mise en protection et valorisation touristique des réserves de ciel étoilé
2015
International audience
Du Front populaire à la Nuit de Cristal : Je m’appelle Herschel Grynszpan
2020
National audience; Notre article propose de présenter au lecteur les différentes étapes et les raisons qui nous ont conduit à abandonner l’approche académique pour le style romanesque afin de pouvoir raconter le parcours d’Herschel Grynszpan en France, de 1936 à 1940.
Reliable numerical solution of a class of nonlinear elliptic problems generated by the Poisson-Boltzmann equation
2020
We consider a class of nonlinear elliptic problems associated with models in biophysics, which are described by the Poisson-Boltzmann equation (PBE). We prove mathematical correctness of the problem, study a suitable class of approximations, and deduce guaranteed and fully computable bounds of approximation errors. The latter goal is achieved by means of the approach suggested in [S. Repin, A posteriori error estimation for variational problems with uniformly convex functionals. Math. Comp., 69:481-500, 2000] for convex variational problems. Moreover, we establish the error identity, which defines the error measure natural for the considered class of problems and show that it yields computa…
Geostatistical computing of acoustic maps in the presence of barriers
2009
Acoustic maps are the main diagnostic tools used by authorities for addressing the growing problem of urban acoustic contamination. Geostatistics models phenomena with spatial variation, but restricted to homogeneous prediction regions. The presence of barriers such as buildings introduces discontinuities in prediction areas. In this paper we investigate how to incorporate information of a geographical nature into the process of geostatistical prediction. In addition, we study the use of a Cost-Based distance to quantify the correlation between locations.
Verso un curricolo 0-6: continuità, discontinuità e prospettive possibili a partire da un percorso di ricerca-azione nella città di Palermo
2021
A partire da una ricerca sulla costruzione di un possibile curricolo zero-sei, condotta con un gruppo di insegnanti di scuola dell’infanzia statale ed un gruppo di educatrici di un nido comunale operanti nello stesso territorio (un quartiere del centro storico di Palermo), l’articolo mira a mettere in luce e a problematizzare ambiti di continuità e di discontinuità tra i due servizi educativi collegandoli alla storia e alla cultura organizzativa dei servizi stessi. Intende, inoltre, riflettere su possibili proposte di cambiamento organizzativo nella direzione della continuità, attraverso l’adozione di una metodologia partecipativa centrata sulla autovalutazione riflessiva, sulla progettazio…
Fusion of CNN and sparse representation for threat estimation near power lines and poles infrastructure using aerial stereo imagery
2021
Abstract Fires or electrical hazards and accidents can occur if vegetation is not controlled or cleared around overhead power lines, resulting in serious risks to people and property and significant costs to the community. There are numerous blackouts due to interfering the trees with the power transmission lines in hilly and urban areas. Power distribution companies are facing a challenge to monitor the vegetation to avoid blackouts and flash-over threats. Recently, several methods have been developed for vegetation monitoring; however, existing methods are either not accurate or could not provide better disparity map in the textureless region. Moreover, are not able to handle depth discon…
FAST EDGE-FILTERED IMAGE UPSAMPLING.
2011
We present a novel edge preserved interpolation scheme for fast upsampling of natural images. The proposed piecewise hyperbolic operator uses a slope-limiter function that conveniently lends itself to higher-order approximations and is responsible for restricting spatial oscillations arising due to the edges and sharp details in the image. As a consequence the upsampled image not only exhibits enhanced edges, and discontinuities across boundaries, but also preserves smoothly varying features in images. Experimental results show an improvement in the PSNR compared to typical cubic, and spline-based interpolation approaches.
Monográfico. Cine: Arte e industria. [DOI:10.37785/nw.v4n2.a6]
2020
En 1895, en plena segunda revolución industrial, el cine emprendió su andadura con la patente del “cine- matógrafo” de los hermanos Lumière, un ingenio que, gracias a un procedimiento mecánico, permitía no solo la captación de imágenes “reales” –como lo hiciera en su momento la fotografía, pero esta vez añadiéndoles movimiento– sino también la proyección de esa continuidad de imágenes impresionadas. No cabe la menor duda de que con el objeto nació una industria, item est, una actividad lucrativa que explotaba la novedosa invención técnica con el fin de producir bienes comerciables que ofertar a la ociosa sociedad burguesa de finales del s. XIX y principios del s. XX. Rápid…
Investigations on the geographical variability of the human transferrins.
1971
On the basis of own and from the widely scattered literature compiled materials the geographical distribution of the transferrin alleles is discussed. They reveal a characteristic distribution pattern, as the slow Tf variants produced by TfD alleles are obviously more frequent in tropical than in non-tropical populations. Considering similar results in cattle and its interpretation by Ashton (1958, 1965), it is hypothesized, that the relatively high TfΓ frequencies in tropical biotops might be a selective adaptation to their special climatic conditions. In this connection an association between slowly moving transferrin proteins in man and tolerance to hotter climates — as could be found in…
Entropic Unmixing in Nematic Blends of Semiflexible Polymers.
2020
Binary mixtures of semiflexible polymers with the same chain length, but different persistence lengths, separate into two coexisting different nematic phases when the osmotic pressure of the lyotropic solution is varied. Molecular Dynamics simulations and Density Functional Theory predict phase diagrams either with a triple point, where the isotropic phase coexists with two nematic phases or a critical point of unmixing within the nematic mixture. The difference in locally preferred bond angles between the constituents drives this unmixing without any attractive interactions between monomers.