In this paper, the algorithm for the discretization of 3D domains into tetrahedral boundary conforming meshes is presented. The algorithm is based on the Delaunay triangulation with special point ordering. The conformity of the resulting mesh with the initial triangulation of the domain boundary is ensured a priori thus the boundary recovery postprocessing step is eliminated. The constrained Delaunay triangulation of the boundary points is obtained using modified Watson's point insertion algorithm. The actual appearance of boundary faces in the final triangulation is achieved by the form of an oriented graph, of the violation of the empty-sphere property of all boundary faces. The cycle dependencies (closed loops in the graph) are eliminated by using the nodal perturbations, by classification of some of the violations as safe and (as the last resort) by forming a new tetrahedron using the advancing front technique. Once all the cyclic dependencies are eliminated, the point insertion process controlled by the dependency graph is started and the constrained Delaunay triangulation of the boundary points is built. In the next phase, additional points are inserted in the interior of the domain, while preserving the boundary constraints, to make the elements of appropriate size with aspect ratio close to one. The resulting mesh is then subjected to optimization in terms of the combination of Laplacian smoothing and topological transformations, in order to remove the potential slivers and to improve the overall mesh quality. and Obsahuje seznam literatury
The preserved correspondence of Božena Němcová can be used as a source for an analysis of her attitude to her children. The letters enable us to reflect if these attitudes diverged from the conventions of the time, to what degree her personal experiences reflected in her raising of the children and what priorities she envisioned for them. The principles Němcová quoted can be to a certain degree seen as representing a clash of only slowly changing social norms (i.e. the notion of the patriarchal family with father-provider) and the rapidly changing social and economic reality. Němcová herself was forced to submit to the economic situation of her family and through her own income tried to improve its situation. As for the raising of the children, she mostly advocated traditional views. However, we can consider modern her conviction of the importance of first-rate education, without regard to gender. As for the future professions of her children, she viewed this question in a practical way, considering the possibilities for professional fulfilment and salary. There is a marked difference in the approach of Němcová to her sons and to her only daughter, influenced of course by the fact of their greater or shorter distance from home, but also probably by certain traditional and gender-stereotypical thinking. The educational style of Němcová should not be considered liberal, as she most often reminded her children of their duties, moral principles, obedience, respect and responsibility.