Watermarking Audio Signals: Analysis of Noise Effect and Error Characteristics -- Determination of the Optimal Honeybee Colony's Location Based on the Productive Potential of the Bee Forage Species -- Statistical properties of stationary flow of substance in a network channel containing arbitrary number of arms -- Reconstruction of Time-Dependent Implied Volatility by Market Observations for European Options in Jump-Diffusion Models -- Performance analysis of a parallel hierarchical semi-separable compression solver in shared and distributed memory environment for BEM discretization of flow around airfoils -- Inuitionistic Fuzzy Anova Approach to the Management of Movie Sales Revenue.