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Showing 1 to 12 of 316 entries
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Color Sparse Representations for Image Processing: Review, Models, and Prospects.

IEEE transactions on image processing : a publication of the IEEE Signal Processing Society

Barthélemy Q, Larue A, Mars JI.
PMID: 26208343
IEEE Trans Image Process. 2015 Nov;24(11):3978-89. doi: 10.1109/TIP.2015.2458175. Epub 2015 Jul 17.

Sparse representations have been extended to deal with color images composed of three channels. A review of dictionary-learning-based sparse representations for color images is made here, detailing the differences between the models, and comparing their results on the real...

Spectral division amplification of a 40 nm bandwidth in a multicore Yb doped fiber and femtosecond pulse synthesis with in-fiber delay line.

Optics express

Rigaud P, Kermene V, Bouwmans G, Bigot L, Desfarges-Berthelemot A, Barthélémy A.
PMID: 26480405
Opt Express. 2015 Oct 19;23(21):27448-56. doi: 10.1364/OE.23.027448.

A compact multicore ytterbium doped fiber amplifier has been implemented according to the spectral division scheme. It was shown that it allows amplification of pulses with about 40 nm wide spectrum. Compensation of the different spectral bands delay through...

Reversible electric-field control of magnetization at oxide interfaces.

Nature communications

Cuellar FA, Liu YH, Salafranca J, Nemes N, Iborra E, Sanchez-Santolino G, Varela M, Garcia Hernandez M, Freeland JW, Zhernenkov M, Fitzsimmons MR, Okamoto S, Pennycook SJ, Bibes M, Barthélémy A, te Velthuis SG, Sefrioui Z, Leon C, Santamaria J.
PMID: 24953219
Nat Commun. 2014 Jun 23;5:4215. doi: 10.1038/ncomms5215.

Electric-field control of magnetism has remained a major challenge which would greatly impact data storage technology. Although progress in this direction has been recently achieved, reversible magnetization switching by an electric field requires the assistance of a bias magnetic...

Myogenic potential of canine craniofacial satellite cells.

Frontiers in aging neuroscience

La Rovere RM, Quattrocelli M, Pietrangelo T, Di Filippo ES, Maccatrozzo L, Cassano M, Mascarello F, Barthélémy I, Blot S, Sampaolesi M, Fulle S.
PMID: 24860499
Front Aging Neurosci. 2014 May 13;6:90. doi: 10.3389/fnagi.2014.00090. eCollection 2014.

The skeletal fibers have different embryological origin; the extraocular and jaw-closer muscles develop from prechordal mesoderm while the limb and trunk muscles from somites. These different origins characterize also the adult muscle stem cells, known as satellite cells (SCs)...

Electron-Beam Poling on Ti:LiNbO(3).

Applied optics

Restoin C, Darraud-Taupiac C, Decossas JL, Vareille JC, Couderc V, Barthélémy A, Martinez A, Hauden J.
PMID: 18364903
Appl Opt. 2001 Nov 20;40(33):6056-61. doi: 10.1364/ao.40.006056.

The periodic domain inversion by direct electron-beam (EB) bombardment on Ti:LiNbO(3) is presented. Gratings with a 6.6-mum period are achieved. The inverted patterns are observed after chemical etching by use of a scanning electron microscope, and they exhibit a...

[Importance and extension of the qualitative approach in phenomeno-structural method in psychopathology].

Bulletin de la Societe des sciences medicales du Grand-Duche de Luxembourg

Barthélémy JM.
PMID: 17124801
Bull Soc Sci Med Grand Duche Luxemb. 2006;(2):249-64.

Fundamental principles of phenomeno-structural method partly originate from a phenomenological approach in psychiatry for which, as Jaspers says, "the important thing is less the study of innumerable cases than the intuitive and major comprehension of some particular ones". It...

Tunnel junctions with multiferroic barriers.

Nature materials

Gajek M, Bibes M, Fusil S, Bouzehouane K, Fontcuberta J, Barthélémy A, Fert A.
PMID: 17351615
Nat Mater. 2007 Apr;6(4):296-302. doi: 10.1038/nmat1860. Epub 2007 Mar 11.

Multiferroics are singular materials that can exhibit simultaneously electric and magnetic orders. Some are ferroelectric and ferromagnetic and provide the opportunity to encode information in electric polarization and magnetization to obtain four logic states. However, such materials are rare...

Localization of NADPH-protochlorophyllide reductase in plastids of barley at different greening stages.

Photosynthesis research

Barthélemy X, Bouvier G, Radunz A, Docquier S, Schmid GH, Franck F.
PMID: 16228444
Photosynth Res. 2000;64(1):63-76. doi: 10.1023/A:1026576319029.

The localization of protochorophyllide (Pchlide) and of NADPH-protochlorophyllide oxidoreductase (POR, EC 1.6.99.1) within (etio)chloroplasts has been investigated at selected stages of greening of barley seedlings. Pchlide pigment and POR protein contents were evaluated in different plastid membrane fractions by...

Efficiency of quadratic soliton generation.

Optics letters

López-Lago E, Simos C, Couderc V, Barthélémy A, Artigas D, Torner L.
PMID: 18049585
Opt Lett. 2001 Aug 15;26(16):1277-9. doi: 10.1364/ol.26.001277.

We report what is believed to be the first experimental demonstration of soliton content as a function of the intensity of input light for multicolor quadratic solitons. Experiments were conducted with spatial solitons excited with Gaussian beams in a...

Fractal dimension and size scaling of domains in thin films of multiferroic BiFeO3.

Physical review letters

Catalan G, Béa H, Fusil S, Bibes M, Paruch P, Barthélémy A, Scott JF.
PMID: 18232925
Phys Rev Lett. 2008 Jan 18;100(2):027602. doi: 10.1103/PhysRevLett.100.027602. Epub 2008 Jan 15.

Domains in ferroelectric films are usually smooth, stripelike, very thin compared with magnetic ones, and satisfy the Landau-Lifshitz-Kittel scaling law (width proportional to square root of film thickness). However, the ferroelectric domains in very thin films of multiferroic BiFeO3...

2-D DIGE identification of differentially expressed heterogeneous nuclear ribonucleoproteins and transcription factors during neural differentiation of human embryonic stem cells.

Proteomics. Clinical applications

Barthéléry M, Jaishankar A, Salli U, Freeman WM, Vrana KE.
PMID: 21136975
Proteomics Clin Appl. 2009 Apr;3(4):505-14. doi: 10.1002/prca.200800109.

Neural stem cells (NSC) are progenitors that can give rise to all neural lineages. They are found in specific niches of fetal and adult brains and grow in vitro as non-adherent colonies, the neurospheres. These cells express the intermediate...

Bud and growth-unit structure in seedlings and saplings of Nothofagus alpina (Nothofagaceae).

American journal of botany

Puntieri JG, Grosfeld JE, Stecconi M, Brion C, Barthélémy D.
PMID: 21636506
Am J Bot. 2007 Aug;94(8):1382-90. doi: 10.3732/ajb.94.8.1382.

In temperate trees, axis length growth generally results from the differentiation of organs at the end of a growing season and the extension of such "preformed organs" in the next growing season. Neoformation, i.e., the simultaneous differentiation and extension...

Showing 1 to 12 of 316 entries