We introduce the notion of weighted watermarking for proof-of-ownership watermark protection of multimedia works that are the product of more than one author and where each author is considered to be of different importance relative to the other authors. We specifically examine weighted segmented watermarking for still images and generalise previous work on performance measurement of watermark ...

In this paper we propose a novel technique for imagebased synchronization of two mobile received TV sequences having different spatial resolutions, deviant image qualities, and possibly lost image blocks. The sequences are aligned spatially and temporally based on an affine transform. The optimal transformation parameters are determined numerically by the LevenbergMarquardt-Algorithm due to com...

We propose a Decision Support System (DSS) for optimal cropping patterns and irrigation water management. The development of the DSS has three objectives. The first is to use mathematical models in order to optimize cropping decisions and irrigation policies under shortage of water in the Kingdom of Saudi Arabia. The second is to help growers exploit optimally their lands in places suffering fr...

Mixed tree cropping systems have been proposed for sustainable nutrient management in the humid tropics. Yet, the nutrient interactions between intercropped trees have not been addressed sufficiently. In the present study we compare the temporal and spatial patterns of the uptake of applied N by four different tree crops in a mixed tree cropping system on a Xanthic Ferralsol in central Amazônia...

In the West African sub-region, intercropping is a critical element in cowpea product profiles. This study aimed to investigate impact of with pearl millet on genetic correlations, heritability, and response selection. Thirty-five genotypes one variety were used create three cropping patterns: sole cowpea, 1:1 (one row cowpea), 2:4 (two rows four cowpea). Split-plot experiments conducted for tw...

Soil biological quality can affect key soil functions that support food production and environmental quality. The objective of this study was to determine the effects of management and time on soil biological quality in contrasting dryland cropping systems at eight locations in the North American Great Plains. Alternative (ALT) cropping systems were characterized by greater cropping intensity (...