Authors: Matthew G. Smith & Manlio Tassieri University of Glasgow Date: 23/03/2022 Install: Run I_Rheo_App_Installer.exe to install I_Rheo. The Installer will automatically install MATLAB runtime. NOTE: You will need administrator rights to run the MATLAB Runtime installer. How to Use: Aim: This program is designed to evaluate the Complex Modulus (G*) and the Complex Viscosity by means of the Fourier transform of the time-dependent stress and strain. The steps are: 1) Import your stress and strain in the form of a .txt file with 3 columns: time (column 1), stress (column 2) and strain (column 3). 2) Input the value of the stress at time = 0 & Input the gradient of the stress at time = infinity. 3) Input the value of the strain at time = 0 & Input the gradient of the strain at time = infinity. 4) Turn Oversampling on or off. 5) Run the FT, plots should be appear in the lower axes. 6) Download the Complex Modulus in the form of a .txt file with three columns: Frequency (column 1), G' (column 2) & G" (column 3). 7) Download the Complex Viscosity in the form of a .txt file with two columns: Frequency (column 1) & Viscosity (column 2).