The electrical potential technique was applied to detect and locate impact damage in carbon fibre reinforced polymer (CFRP) plates of Hexcel T300/914 composite. The potential field across the surface of the laminates was measured using arrays of electrical contacts. A constant current of 100 mA was applied to the plate, and the changes in the potential distribution resulting from impact damage documented. These results have been compared with those calculated using 3D finite element simulation of current flow in CFRP laminates. The results show good agreement between simulation and experimental results and will permit detailed analytical studies of optimum network and current input configurations for the practical realization of a damage sensing system. A comparison of potential distribution on the top surface for damaged and undamaged laminates shows a substantial difference in the potential field around the impact damaged area. This could form the basis of a damage detection system.

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ABSTRACT. Genetic diversity within Vicia faba L. is key to the genetic improvement of this important species. In this study, morphological traits and RAPD molecular markers were used to assess the levels of polymorphism across 12 Tunisian populations, three major and nine minor from different locations. Analysis of morphological traits indicated that the three major populations showed significant differences and the nine minor populations exhibited considerable variation for most traits. The grain yield of the Alia population could be increased by inoculation. Of the seven primers tested, it was clear that the Cs12 primer would be recommend for genetic diversity analysis of V. faba. Within population genetic diversity exhibited 94% of total diversity. Intra-population genetic diversity (H S ) was 0.16, which was clearly higher than between population genetic diversity (D ST = 0.06) UPG-MA showed a high level of genetic variation between major and minor populations of V. faba L. Particularly the minor populations showed a high level of diversity and was divided into two subclusters. Ltaifia was separated from the other populations. In addition to a high grain yield, I.Z. Backouchi et al. 7588©FUNPEC-RP www.funpecrp.com.br Genetics and Molecular Research 14 (3): 7587-7596 (2015) these populations showed the lowest Nei and Shannon indices (H = 0.08 and I = 0.13) justifying their homogeneity. For these reasons, these cultivars can be considered a selected population. However, the Takelsa population showed the highest Nei and Shannon indices (H = 0.13 and I = 0.21), indicating that this population was the most heterogeneous, which is interesting for breeding programs.

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(SnS) m (Sb 2 S 3) n thin films were prepared by thermal evaporation using the glancing angle deposition technique (GLAD). The incident angle between the particle flux and the normal to the substrate was fixed at 80°. The Raman and XRD characterization revealed the amorphous character of the films due to the columnar structure as shown by the SEM characterization and AFM analysis. A strong change of the surface morphology of the films was observed and it depends on the composition. Optical properties were extracted from transmittance T and reflectance R spectra. (SnS) m (Sb 2 S 3) n thin films exhibit high absorption coefficients (10 4-2×10 5 cm-1) in the visible range and the higher values were obtained for Sn 3 Sb 2 S 6 and it has the highest photocurrent values. The direct band gap (E g dir) was in the range 2.11-1.67 eV. The refractive indices are calculated from optical transmittance spectra of the films. The Sn 3 Sb 2 S 6 sample exhibits a lower refractive index. All the dispersion curves of refractive index match well with the Cauchy dispersion formula and they were analyzed using Wemple-DiDomenico model. The Bruggeman effective medium approximation EMA was used to calculate the packing density of different compositions, and SnSb 4 S 7 sample has the highest