Search results for " Local"

Spectral theory of a Neumann-Poincaré-type operator and analysis of cloaking by anomalous localized resonance II

2014

If a body of dielectric material is coated by a plasmonic structure of negative dielectric constant with nonzero loss parameter, then cloaking by anomalous localized resonance (CALR) may occur as the loss parameter tends to zero. The aim of this paper is to investigate this phenomenon in two and three dimensions when the coated structure is radial, and the core, shell and matrix are isotropic materials. In two dimensions, we show that if the real part of the permittivity of the shell is $-1$ (under the assumption that the permittivity of the background is $1$), then CALR takes place. If it is different from $-1$, then CALR does not occur. In three dimensions, we show that CALR does not occu…

Antifungal and post-antifungal effects of chlorhexidine, fluconazole, chitosan and its combinations on Candida albicans

2010

Objective: The aim of this work was to assess the antifungal and post-antifungal effects of chlorhexidine, fluconazole, chitosan and its combinations on virulence factors of Candida albicans. Study Design: Ten isolated strains of Candida albicans obtained from 10 patients with oral candidiasis and a collection strain of C. albicans were treated with antifungal agents in different concentrations or combinations of them. Virulence factors analyzed were the cell surface hydrophobicity, the germinative tube development, the phospholipase activity and the post-antifungal effect of that exposure. Results: Virulence factors of the isolated strains obtained from patients together with the collectio…

In vitro antifungal properties of mouthrinses containing antimicrobial agents

1997

The purpose of this study was to investigate the in vitro antifungal properties of seven commercial mouthrinses containing antimicrobial agents. These included cetylpyridinium chloride (CPC), chlorhexidine digluconate (CHX), hexetidine (HEX), sanguinarine (SNG), and triclosan (TRN). The minimum fungicidal concentration (MFC) against six species of yeasts was determined by a broth macrodilution method. The kill-time of mouthrinses at half the concentration of the commercial formulations was also determined. MFCs were achieved with each mouthrinse, except the SNG-containing mouthrinse, against all the organisms being tested. However, the CPC-containing mouthrinse appeared more active than the…

Des luttes locales à la résistance globale

2001

En este texto mecanografiado se indica que se trata de un editorial para el "Bulletin des Amis de Le Monde Diplomatique" (mayo de 2001), pero no se ha encontrado la versión publicada.

Lidocaine inhibits potassium efflux and hemolysis in erythrocytes during oxidative stress in vitro.

2000

Lidocaine is a widely used local anesthetic agent. The aim of this work was to study the action of lidocaine on human red blood cells exposed to an oxidative stress in vitro. Blood was obtained from healthy volunteers. After separation from plasma, the erythrocytes were suspended in phosphate buffer. Oxidative stress was induced by incubation with a free radical generator, the 2,2' azobis (2-amidinopropane) hydrochloride (AAPH). Erythrocytes were incubated with or without lidocaine at two concentrations (36.93 and 73.85 microM) and with or without AAPH (20 mM). Electron paramagnetic resonance (EPR) spectroscopy was performed to identify the free radical species generated by AAPH using the s…

Louvre Abu Dhabi. Verso il primo museo universale arabo.

2014

Análisis de los Stakeholders (actores) como instrumento potencial en los procesos de participación de las agendas 21 local. El caso de Sonà (Panamà)

2008

Localisation visuelle basée sur la reconnaissance du lieu dans les environnements changeants

2017

In many applications, it is crucial that a robot or vehicle localizes itself within the world especially for autonomous navigation and driving. The goal of this thesis is to improve place recognition performance for visual localization in changing environment. The approach is as follows: in off-line phase, geo-referenced images of each location are acquired, features are extracted and saved. While in the on-line phase, the vehicle localizes itself by identifying a previously-visited location through image or sequence retrieving. However, visual localization is challenging due to drastic appearance and illumination changes caused by weather conditions or seasonal changing. This thesis addres…

Towards a local approach to fatigue, for the calculation of structures, applied to continuous fibre reinforced composite materials and structures

2018

The original concept of mechanical fatigue was linked to the failure of structures and was treated at first within the framework of Fracture Mechanics. Models developed to explain this phenomenon must therefore be able to be applied to structures: changing the structure means changes to the model and its identification. It is therefore judicious to develop models capable of treating both the damage processes and also able to be used within a local framework: to this end a method based on Damage Mechanics seems appropriate. This approach has long been employed and requires only the identification of damage processes at the level of the RVE (Representative Volume Element) to be used for any s…

La articulación local-global de sistemas territoriales de producción y de innovación

2009

RESUMEN Frente a la controversia al respecto en economía regional, este artículo defiende la complementariedad entre la innovación regional y global en los sistemas de producción y de innovación (SPI), como clave de la articulación (dinámica, secuencial y recursiva) local-global. Para ello se introduce el concepto de nudos tecnológicos localizados (NUTELO). Los NUTELO son los eslabones de la cadena de valor donde convergen la especificidad de los SPI y el ámbito de mayor densidad de sus relaciones externas. Un esbozo de marco evolucionista se apoya en el estudio de la articulación de la citricultura valenciana con la citricultura catalana y argentino-uruguaya. ABSTRACT The local or global c…