2 research outputs found
A blind robust watermarking scheme based on svd and circulant matrices
Multimedia security has been the aim point of considerable research activity
because of its wide application area. The major technology to achieve copyright
protection, content authentication, access control and multimedia security is
watermarking which is the process of embedding data into a multimedia element
such as image or audio, this embedded data can later be extracted from, or
detected in the embedded element for different purposes. In this work, a blind
watermarking algorithm based on SVD and circulant matrices has been presented.
Every circulant matrix is associated with a matrix for which the SVD
decomposition coincides with the spectral decomposition. This leads to improve
the Chandra algorithm [1], our presentation will include a discussion on the
data hiding capacity, watermark transparency and robustness against a wide
range of common image processing attacks.Comment: 12 pages, 6 figures, 5 tables, Second International Conference on
Computational Science & Engineering (CSE - 2014
Experimental Investigation on the Properties of a Recycled Aggregate Concrete Based on Waste of the Industrial Mineral Additions
This study investigates the possible effects of incorporating different industry wastes during manufacturing of concrete, with percentages ranging from 0% to 30%, and assesses the influence of these combinations (mineral additions and recycled aggregates) on the properties of a recycled concrete comprised of these two main constituents products. Recycled concrete samples with different combinations of mineral additions at various dosages were used to determine these properties in the fresh and hardened states. The ”Design-expert” methodology was used to analyse the results after 7, 14 and 28 days, identifying correlations and the effects of the different variables. The results obtained showed the advantageous effect of incorporating the pozzolana and slag into the concrete mixture at dosages of 15% and 30%, they also demonstrated the low optimal percentage of marble fillers of 5%. These findings suggest that replacing clinker with industrial waste could limit the dust and CO2 emissions into the atmosphere during concrete manufacture, offering environmental advantages as well as conserving the natural resources of aggregate recovery from C&D wastes.
Keywords: environmental concrete, mineral additions, recycled aggregate, design expert method