correlation analysis

 This study assesses the hydrochemical dynamics of the Rika and Tereblia Rivers in Ukraine to evaluate water quality trends. Key water quality parameters, including biological oxygen demand, dissolved oxygen, total suspended solids, ammonium, nitrate, nitrite, phosphate, and sulphate, were analysed over a 10-year monitoring period. Statistical tools, such as Pearson correlation and regression analysis, were applied to determine relationships among these parameters and identify pollution sources.

The paper is devoted to analysis of effectiveness the applying of correlation and variogram analyses for steganogram detection. The case of usage multistage steganographic methods for data embedding in digital images is considered. Applying of variogram analysis gives opportunity to disclosure the steganograms even in case of low container’s degree of stegodata filling. It is shown that correlation analysis has limited opportunities in mentioned case.