From representative volume element of interacting particles to the extraction of their effective properties.

The main concern of this investigation was the relation between the representative volume element of the scattered flux from 2D random agglomerates, composed of sub-wavelength interacting particles, and the extraction of their effective electromagnetic properties. Using a constant ratio between agglomerates radius and wavelength, behaviors of the scattered flux mean value and standard deviation were studied as a function of the agglomerate surface, in the case of relevant particle permittivities. Using the mean or standard deviation functions, two criteria for homogenization were derived.

Catastrophic acute retinal necrosis syndrome associated with diffuse orbital cellulitis: a case report.

Background: To report a case of severe acute retinal necrosis syndrome (ARN) associated with initial features of orbital cellulitis.

Methods: A 49-year-old immunocompetent woman presented with unilateral painful orbital inflammation associated with deep visual loss due to ARN. Polymerase chain reaction (PCR) for detection of viral DNA was applied to ocular fluids.