List of Articles Linear method Open Access Article Abstract Page Full-Text 1 - FIR and IIR Filters for Sound Equalization Systems Teimour Tajdari Open Access Article Abstract Page Full-Text 2 - Determining the nonlinear effect of the money market interest rate on the Tehran stock exchange by the means of generalized autoregressive conditional heteroskedasticity (GARCH) model and smooth transition regression (STR) model Mohammad Mehdiabadi Rahmatollah Mohammadipour Open Access Article Abstract Page Full-Text 3 - Adsorption of Copper (II) Ions on a Montmorillonite Clay and its Application as Heterogeneous Catalyst for Knoevenagel Condensation Reaction Hanane Essebaai zakaria Benzekri Houda Serrar Ahmed Lebkiri Said Boukhris Said Marzak ElHousseine Rifi 10.22034/jchr.2021.1913071.1209