Various acquisition, analysis, visualization and compression approaches sample surfaces of 3D shapes in a uniform fashion, without any attempt to align the samples with sharp edges or to adapt the sampling density to the surface curvature. Consequently, triangle meshes that interpolate these samples usually chamfer sharp features and exhibit a relatively large error in their vicinity. We presen...

A hybrid optical waveguide having a 90° sharp bend structure, composed of a dielectric straight waveguide, tapered dielectric strip waveguide, and microscale metal gap waveguide, is experimentally demonstrated in an attempt to improve the efficiency of light coupling between dielectric and plasmonic waveguides. Due to both the efficient structure of the taper and metal gap, the calculated coupl...

It is proved that every series-parallel digraph whose maximum vertex-degree is ∆ admits an upward planar drawing with at most one bend per edge such that each edge segment has one of ∆ distinct slopes. This is shown to be worst-case optimal in terms of the number of slopes. Furthermore, our construction gives rise to drawings with optimal angular resolution π ∆ . A variant of the proof techniqu...

In this paper we study properties of intersection graphs of kbend paths in the rectangular grid. A k-bend path is a path with at most k 90 degree turns. The class of graphs representable by intersections of k-bend paths is denoted by Bk-VPG. We show here that for every fixed k, Bk-VPG ( Bk+1-VPG and that recognition of graphs from Bk-VPG is NP-complete even when the input graph is given by a Bk...

Curved channels are one of the most fundamental units natural or artificial channels, in which there different kinds obstacles; these include vegetation patches, bridge piles, electrical tower foundations, etc., all present over a channel bend, and can significantly alter hydrodynamic characteristics when compared to bare bed. In this study, laboratory experiments numerical simulations were com...

In 2002, paleolatitude data led researchers from the Ocean Drilling Program to investigate whether the Hawaiian Emperor Bend resulted from a moving hotspot and/or true polar wander as opposed to forming solely as a result of plate movement. In 1963 J. Tuzo Wilson had proposed that the bend was caused by a change in direction of plate movement over the hotspot. With new findings and more extensi...

Asymmetrical bending waves can be obtained by reactivating demembranated sea urchin spermatozoa at high Ca2+ concentrations. Moving-film flash photography shows that asymmetrical flagellar bending waves are associated with premature termination of the growth of the bends in one direction (the reverse bends) while the bends in the opposite direction (the principal bends) grow for one full beat c...

The evidence is accumulating that dinucleotide steps other than AA/TT affect DNA flexure of AnTm (m + n greater than = 4) containing fragments. However, it is not clear whether macroscopic DNA flexure without AA/TT steps might occur. In this paper we demonstrate the anomaly in electrophoretic mobility of non AA/TT repetitive DNA sequences which is a function of sequence phasing. Therefore, our ...

In this paper, we present a general scheme to produce interactive and static orthogonal drawings of graphs. As opposed to most known algorithms, we do not restrict ourselves to graph with maximum degree 4, but allow arbitrary degrees. We show here how, with one speciic implementation of the scheme, we can obtain an m+n 2 m+n 2-grid for all simple connected graphs without nodes of degree 1. Furt...