Usman Hameed

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We investigate the effect of network errors on Embedded Zerotree Wavelet (EZW) encoded images and propose modifications to the EZW coder to increase error resilience in bursty packet loss conditions. A hybridencoding scheme that uses data interleaving to spread correlated information into independently processed groups and layered encoding to protect(More)
Cycle time models perform an <i>a-priori</i> calculation of local signal delays by estimating the lengths of wires connecting different levels of synchronously clocked logic elements. Typically, a signal will have to pass through approximately 15-25 layers of logic during a single clock cycle and it is has been assumed that this number is sufficiently large(More)
Cotton leaf curl virus disease (CLCuD) is caused by a suite of whitefly-transmitted begomovirus species and strains, resulting in extensive losses annually in India and Pakistan. RNA-interference (RNAi) is a proven technology used for knockdown of gene expression in higher organisms and viruses. In this study, a small interfering RNA (siRNA) construct was(More)
At least five begomoviral species that cause leaf curl disease of cotton have emerged recently in Asia and Africa, reducing fiber quality and yield. The potential for the spread of these viruses to other cotton-vegetable growing regions throughout the world is extensive, owing to routine, global transport of alternative hosts of the leaf curl viruses,(More)
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