Mohamed Abdel Salam

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problem statement: Digital image watermarking is the most popular method for image authentication, copyright protection and content description. Zernike moments are the most widely used moments in image processing and pattern recognition. The magnitudes of Zernike moments are rotation invariant so they can be used just as a watermark signal or be further(More)
A field experiment was conducted to evaluate photosynthetic efficiency along with different growth parameters of aromatic rice genotypes. Forty genotypes including three non-aromatic checks exhibited enormous variations for leaf area index (LAI), crop growth rate (CGR), relative growth rate (RGR), net assimilation rate (NAR), grain yield, total dry matter,(More)
Irrigating fruit orchards and crops with bicarbonate waters was found to develop stunted growth and malnutrition symptoms. These symptoms were related, in most cases, to the bicarbonate ion effect on plant nutrition. Direct effects of bicarbonate on respiration, reducing absorption of ions and inducing chlorosis etc. were reported by B a x t e r and B e l c(More)
A generalizes model presenting the sandwich beams was developed to calculate the flexural rigidity and sandwich beams dynamic characteristics. Different cases such as sandwich beams multi layer cores, sandwich beams multi cells, sandwich beams with holes in its cores having different shapes and different orientations were investigated. The finite element(More)
A generalizes model presenting the sandwich beams was developed to calculate the flexural rigidity and sandwich beams dynamic characteristics. Different cases such as sandwich beams multi layer cores, sandwich beams multi cells, sandwich beams with holes in its cores having different shapes and different orientations were investigated. The finite element(More)
It is recognized that in phosphate fertilization only a small percentage of the added phosphorus is absorbed by plant and the remainder is fixed in the soil in various relatively insoluble forms. Fixation is generally attributed to either/or chemical precipitation, physico-chemical sorption and the utilization by micro-organisms. The present literature on(More)
Growth and ion uptake by maize seedlings was studied as functions of calcium concentration and rate of flow of nutrient solutions. With calcium concentrations established at 1, 10, and 100 ppm Ca, all other nutrients being kept at constant concentration, the solutions passed through narrow culture trays at velocities of 2, 8, and 24 liter/day. Fresh and dry(More)