Search results for " Structures"
showing 10 items of 4162 documents
Fracture of Honeycombs Produced by Additive Manufacturing
2022
Publisher Copyright: © 2021 World Scientific Publishing Europe Ltd. Lattice materials, such as honeycombs, are remarkable in their ability to combine high stiffness, strength and toughness at low density. In addition, the recent and pervasive development of additive manufacturing technologies makes it easier to produce these cellular materials and opens new possibilities to improve their properties by implementing small modifications to their microstructure. Such developments open new opportunities towards the design of new classes of architectured materials. For example, recent computational studies have shown that honeycombs with lattice density gradients have a fracture energy under tens…
Modélisation auto cohérente du comportement viscoplastique en grandes déformations et à grandes vitesses d'un métal cubique centré préalablement choq…
2005
International audience
Offsetting Self-Phase Modulation in Optical Fibre by Sinusoidally Time-Varying Phase
2018
We report on our recent experimental and theoretical results on the use of a sinusoidally time-varying phase to suppress undesirable self-phase modulation of optical pulses propagating in fibre-optic systems.
Mitigation of self-phase modulation by sinusoidally time varying phase
2018
The propagation of intense ultra-short optical pulses in a Kerr medium such as an optical fibre remains a critical issue for many optical systems. This is because the self-phase modulation (SPM) of the propagating pulse usually causes a severe broadening of the pulse spectrum that is typically accompanied by an oscillatory structure. Several strategies have been proposed and successfully deployed to counteract the deleterious effects of SPM in fiber-optic systems, including spatial or temporal scaling to reduce the impact of nonlinearity. Other approaches rely on the exploitation of the peculiar properties of parabolic shaped pulses and self-similar evolution. However, none of these last te…
Sampling and amplification technique based on XPM-induced focusing in normally dispersive optical fibers
2016
International audience; We theoretically and experimentally investigate an all-optical amplification and sampling technique based on a XPM process between an arbitrary signal and an intense orthogonally polarized high repetition rate sinusoidal pump wave within a normally dispersive optical fiber.
Amino acid transporter heavy chain CD98hc: Expression and role in Drosophila olfactory perception
2015
Amino acid transporter heavy chain CD98hc: Expression and role in Drosophila olfactory perception. 16. rencontre du Club de neurobiologie des invertébrés
Plasmalogen levels are reduced in erythrocytes from patients with diabetic retinopathy
2011
Plasmalogen levels are reduced in erythrocytes from patients with diabetic retinopathy. annual meeting of the association-for-research-in-vision-and-ophthalmology (ARVO)
Bioavailability of dietary omega-3 DHA and lutein for the retina: results from a preclinical study in mini-pigs with encapsulated nutrients
2015
Purpose: Epidemiological studies support the hypothesis that dietary omega-3 long chain polyunsaturated fatty acids and carotenoids prevent from Age-related Macular Degeneration (AMD). AREDS2 failed to find benefits of omega-3 supplementation on the progression to advanced AMD. However, lower risk progression was reported in AMD patients of the NAT2 study whom omega-3 incorporation in red blood cells and plasma was the highest. Our purpose was to test whether feeding mini-pigs with encapsulated docosahexaenoic acid (DHA) and lutein would promote the bioavailability of the nutrients in plasma and tissues including the retina. Methods: Microparticles containing lutein and DHA were formed by s…
Evaluation of two treatment-modalities with ranibizumab for exudative age-related macular degeneration: inject and extend vs PRN (pro-re-nata)
2011
Evaluation of two treatment-modalities with ranibizumab for exudative age-related macular degeneration: inject and extend vs PRN (pro-re-nata). annual meeting of the association-for-research-in-vision-and-ophthalmology (ARVO)
What is driving the decision to perform filtering surgery in glaucoma patients?
2015
Purpose: To assess what is driving the decision to perform a filtering procedure in glaucoma patients. Methods: Retrospective study in one single University center. All the indications for filtering glaucoma surgeries (alone or combined with cataract extraction) performed in 2013 by the same surgeon were reviewed. The indications were as follows: clinical evaluation of the optic disc, visual field progression, progression on imaging (OCT), poor tolerance to medical treatment, poor control of intraocular pressure (IOP) and cataract. Results: The filtering surgeries (n = 159) were as follows: 78 trabeculectomies, 45 combined cataract and deep sclerectomy, 24 combined cataract and trabeculecto…