Complex variable techniques are employed to characterize two-dimensional solutions u{x, y) of Laplace's equation which satisfy the boundary condition [fi(d2u/ dy2) + (du/dx)]x„0 = 0, where /? is referred to as the surface-stiffness parameter. Simple closed-form singular solutions are derived which satisfy this boundary condition and represent source and dislocation singularities. The former is ...

The complete rheological curves of basic role printing offset inks in the temperature range 20÷60°C have been obtained. flow models and analytical formulas are analyzed tested tocalculate value most important macro- microrheological parameters; identified boundaries appearance extinction wall effects, phenomenon ink separation (generation axial "pigment streamer"), formation (and reformation) s...