Hamad Ahmed

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All-optical approaches to particle acceleration are currently attracting a significant research effort internationally. Although characterized by exceptional transverse and longitudinal emittance, laser-driven ion beams currently have limitations in terms of peak ion energy, bandwidth of the energy spectrum and beam divergence. Here we introduce the concept(More)
In this paper, we consider four types of images namely gray scale, indexed, colour and black & white images and apply steganogrphic techniques by embedding text of 512 bytes in each of these images. Three simple pixel replacement techniques like equal or nearly equal pixel replacement in each column, equal or nearly equal in pixel replacement in entire(More)
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