Nabil Gmati is a professor of applied mathematics at the University Tunis el Manar. Kamel Barkaoui is full professor (Exceptional Class) at the Department of Computer Science of Conservatoire National des Arts et Métiers (Cnam).Mathieu Roche is a Senior Research Scientist at CIRAD – TETIS.

• A Note on Additive Model Building for Spatial Functional Regression.- Quadratic Programming Problems with Preprocessing and a Diagonally Dominant M-matrix.- Beta Prime Kernel Availability Density Estimation of a Repairable Series System.- Imperfect maintenance of series systems.- Performance Evaluation of a Web services.- Modeling and analysis of Covid’19 patients hospitalization dynamic reliability by a semi-Markovian model.- Combinatorial optimization of banana clean reliance.- Adaptive Refined Descriptive Sampling Algorithm for Dependent.- variables using Iman and Conover method in Monte Carlo simulation.- Linear Control Design for Synchronization of Fractional Predator-Prey.- Systems with Group Defense and Harvesting.- Fractional dynamics of a Cholera model with Atangana-Baleanu operator.- Fractional-order dynamics of a Typhoid epidemic model.- A model of plasmid-bearing, plasmid-free competition in a chemostat.- On a slow-fast SEIRS Model structured in age.- Global asymptotic stability for a predator-prey model.- The operating diagram of an SIS model in the chemostat.- On a competition model of two toxin-producing species in the chemostat.