A convenient explicit reduction of Einstein equations in harmonic gauge: Connection with wave maps type equations C. Tadmon	1-20
Squeezing in Floquet States and Quasi-energies of Harmonic Oscillator Driven by a Strong Periodic Field M. Janati-Idrissi, A. Fedoul, Y. Achkar, A. Chatwiti and S. Sayouri	21-30
The ladder operators of Rosen-Morse Potential with Centrifugal term by Factorization Method A. R. Amani, M. A. Moghrimoazzen, H. Ghorbanpour, S. Barzegaran	31-37
Brans-Dicke scalar field and de Sitter Relativity E. Benedetto	39-47
Gibbs's Measures of a Multi-Colored Disordered Lattice Gas H. Zeghdoudi and H. Boutabia	49-54
Statistics of a single D-manifold restricted to two parallel biomembranes or a tubular vesicle M. Benhamou, K. Elhasnaoui, H. Kaidi, M. Chahid	55-64
Fractional Oscillator Algebra and q-Deformed Oscillator Algebra E.H. El Kinani, M.R. Sidi Ammi and M. Rahmoune	65-70
Stability and Synchronization Criteria for Parametrically driven oscillators O. I. Olusola, U. E. Vincent and A. N. Njah	71-79
2-dimensional algebras M. Goze and E. Remm	81-91
Kekulé Cycles as 1D Analogue of Graphene: Electronic Properties L. B Drissi, E.H Saidi and M. Bousmina	93-115
Absorption spectrum for a multi-photon $\Xi$-type three-level atom driven by a binomial field with nonlinearities A. A. Eied	117-126