Digital terrain models (DTMs) are considered important basic geographic data. They are widely used in the fields of cartography, land utilization, urban planning, communications, and remote sensing. Digital photogrammetry mainly based on stereo image matching is a frequently applied technique to generate DTMs. Generally, the process of ground filtering should be applied to the point cloud deriv...

7 An analytical solution using homotopy analysis method is developed to describe the non8 linear progressive waves in water of finite depth. The velocity potential of the wave is ex9 pressed by Fourier series and the nonlinear free surface boundary conditions are satisfied by 10 continuous mapping. Unlike the perturbation method, the present approach is not dependent 11 on small parameters. Thu...

A method is described by which complement fixation is detected with an enzyme linked immunosorbant assay (ELISA) technique. The method obviates the need for sensitised sheep red blood cells as an indicator of complement fixation and the titration of complement is not critical. The dose response curve has the advantage of being steep and the test result is read photometrically. As test serum and...

This article deals with a method, based on total variation diminishing (TVD) scheme, for solving three-dimensional equations of gravitational gas dynamics. For this method a parallel algorithm of the decision is offered. Equations of this kind are a powerful approach to simulating astrophysical problems. Numerical schemes applied for their solving must provide high-resolution capturing of shock...

A linear singularly perturbed time dependent convection–diffusion problem is examined. The initial condition is designed to have steep gradients in the vicinity of the inflow point, which are transported in time, thus creating a moving interior shock layer. The location of this interior layer is tracked by the characteristics of the reduced first order problem. A numerical method is designed an...