PROTECTION OF CRITICAL INFRASTRUCTURE SYSTEMS: APPLICATION OF NON-STANDARD METHODS IN FORENSIC ANALYSIS OF COLORED MATERIALS

The direct experimental method as a method of infrared spectrophotometry (FT-IR) and the method of scanning electron microscopy (SEM/EDS) give diagrams which are very complex and difficult to interpret and even more difficult to perform a forensic actual conclusion. In this paper authors explain the application of methods of mathematical statistics and the use of analogies to physical characteristics of the absorption of irreversibly (without recombination effects) and reversible (with recombination effects). Selection of curves with the experimental diagram "dropped" is on curves exponentially decreasing, i.e. belonging to irreversible absorption and curve type Bessel functions, which are due to reversible absorption. As for the irreversible absorption curves, their histograms using the method of least squares translated into analytic functions. In practice, it gets a series of exponential curves but with different parameters, and the mean values of the characteristics can be determined by one of the obtained analytical curves, but the composition of all registered curves and the resulting distribution for a group of exponential distributions with different parameters. The application of this method to an example is shown in practice. Keywords: Forensics of colors materials, Laboratory analysis, Mathematical statistics