We introduce a new model in the context of non-planar orthogonal graph drawing that we call slanted orthogonal graph drawing. While in traditional orthogonal drawings each edge is made of alternating axis-aligned line segments, in slanted orthogonal drawings intermediate diagonal segments on the edges are permitted, which allows for: (a) smoothening the bends of the produced drawing (as they ar...

The slope-number of a graph G is the minimum number of distinct edge slopes in a straight-line drawing of G in the plane. We prove that for ∆ ≥ 5 and all large n, there is a ∆-regular n-vertex graph with slope-number at least n1− 8+ε ∆+4 . This is the best known lower bound on the slope-number of a graph with bounded degree. We prove upper and lower bounds on the slope-number of complete bipart...

The assessment of the influence of the work-hardening of material on the optimum die profile and drawing force  in rod drawing process is the main objective of the present paper. The upper bound solution, based on the assumption of perfect plasticity, has been extended to consider the work-hardening of the material during the rod drawing process through curved dies. Analytical results of drawin...

Because photographs capture an individual at a moment in time, they contain fleeting features as well as more stable ones. Caricature line drawings, however, include stable features and emphasize distinctive ones. As such, caricatures are closer to schematic memory representations than are photographs. Three experiments using faces of public figures test the hypothesis that caricatures yield be...

Graphs are ubiquitous data structures in computer science. Many important problems have solutions hidden in the complexity of modern graphs, rendering effective visualization techniques extremely valuable. The need for such visualization techniques has led to the creation of a myriad of graph drawing algorithms. We present several algorithms to draw several of the most common types of graphs. W...

One of the first basic actions, during which children create their own product, is drawing. The possibilities, that a computer offers, for this action are much richer and more provocative than that of the white paper and drawing paints. The work with colours, lines, form and predefined images builds combining talents, develops the aesthetic taste and stimulates the child’s thinking and imaginat...