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References [1] ZHANG Deshuai, ZHANG Xiaodong, ZHANG Zhongyi, et al.
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Documento aprobado por el Comité Ejecutivo del Grupo de Trabajo de Calidad Ambiental y Desarrollo Sostenible de la CRUE, 2005 [5] Peralta ME, Marcos, M, Aguayo, F.
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In the related work, the most common method which is used to hide the message involve the usage of LSB developed by Chandramouli et al. [2], by applying the filtering, masking and transformation on the cover media.
Weiqi Luo el al., [3] proposed LSB matching revisited image steganography and edge adaptive scheme which can select the embedding regions according to the size of secret message.
Nagaraj et al. [6] an approach of color images, using Pixel Value Modification has been proposed.
Potdar et al. [9] proposes GLM (Gray level modification) technique which is used to map data by modifying the gray level of the image pixels.

Gorjizadeh et al. [5] demonstrated that the conductance decreases in defective graphene sheets.
Pei et al. investigated the effect of functionalized groups on mechanical properties of graphene.
Liu et al. [6, 7] reported structure, energy and transformations of graphene grain boundaries and their effect on failure strength.
As confirmed by Zhao et al. [19], the possible model size effect on mechanical properties can be largely neglected when the diagonal length is over 5 nm.
[32] E.L.

The MCD agreed very well with the GFMC of Hellberg and Manousakis [25]c, the LED of Emery et al. [15], and the SBFI (U(1) slave-boson functional integral) result of Gimm and Salk [30].
The triangles denoted by HM represent the Green's function Monte Carlo prediction of Hellberg and Manousakis [25] c , and the stars denoted by EKL the exact diagonalization result of Emery et al. [15].
Schriber, E.L.
Hammel et al.: Physica C Vol. 185-189 (1991), p. 1095
Bedel et al.

[5] El-Molla M.
T., et al, Effective ab Initio Emulsion Polymerization under RAFT Control, Macromolecules. 35-25 (2002) 9243-9245
R., Saiz E., et al, Analysis of Copolymers of Styrene and Methyl Methacrylate Using Size Exclusion Chromatography with Multiple Detection, Physical Chemistry Chemical Physics. 5 (2003) 151-157
G., et al, RAFT Miniemulsion Polymerization of Methyl Methacrylate, Polymer. 50 (2009) 4332-4342
[11] Creton C., Hu G.J., Deplace F., et al., Large-Strain Mechanical Behavior of Model Block Copolymer Adhesives, Macromolecules. 42 (2009) 7605-7615.

According to Zhang et al [12], if the doping ion increase with the increasing polarization of the oxygen ion, the cloud’s distortion level will increase and results a decreasing the energy gap.
According to Shen et al.[16], the band gap energy obtained for LiNbO3 doped with osmium (Os) shows a large reducing from 3.78 eV to 0.7 eV using generalized gradient approximation of Perdew-Burke-Ernzerhof (GGA-PBE).
El-Ads, Perovskite Mater.
Boukhtouta et al., Philos.
Huang et al., Chinese Phys.

Piorkowska and al. [2] developed a probabilistic approach.
Durin and al. [3] used the Haudin and Chenot's model [4] adding a correction to the density of nuclei.
Durin an al. [3] worked on continuous fibers.
In Frang and al. work on short fibers [5, 6], spherulites and transcrystalline cylinders are assumed growing in the same space.
El Otmani, M.

Introduction Geopolymers are aluminosilicate inorganic polymers resulting from the reaction between an alkaline activator solution and aluminosilicate powder, which causes a transformation from an amorphous to a semicrystalline 3D structure of the Si-O-Al network [1-4].
The band in the region of 800-1200 cm-1 is a strong band of the GF, which corresponds to the asymmetric stretching vibration of the Si-O-T (T: Si or Al) that indicates the formation of a geopolymer gel (geopolymer network) [21-22].
The FT-IR spectra of the geopolymer product showed the difference of types in chemical bonding, such as OH, H-O-H, Si-O-T (T=Si or Al), Si-O and also carbonation occurred on the surface.
Al Bakri, K.
El-maghraby, Characterization of low-purity clays for geopoly- mer binder formulation, Int.