—It has been estimated that approximately one-third of hardwood sawlogs have a significant amount of sweep and that 7 to nearly 40 percent of the yield is lost from logs that have greater than 1 inch of sweep. While decreased yield is important, for hardwood logs the loss of lumber value is likely more significant. A method that produced lumber while accounting for log curvature (sweep) would a...

We have extended Fortune’s sweep-line algorithm for the construction Voronoi diagrams in the plane to the surface of a sphere. Although the extension is straightforward, it requires interesting modifications. The main difference between the sweep line algorithms on plane and on the sphere is that that the beach line on the sphere is a closed curve. We have implemented this algorithm and tessell...

In previous studies, the concept of quarter-sweep iteration has been pointed out to accelerate the convergence rate in solving any system of linear equations generated by using approximation equations. Based on the same concept, the essential aim of this paper is to investigate the effectiveness of the Quarter-Sweep Arithmetic Mean (QSAM) method by using the quarter-sweep approximation equation...

In this paper a new approach is proposed to point-location in a three-dimensional cell-complex 7 , which may be viewed as a nontrivial generalization of a corresponding two-dimensional technique due to Sarnak and Tarjan. Specifically, in a space-sweep of 7), the intersections of the sweep-plane with P occurring in a given slab, i.e., between two consecutive vertices, are topologically conformal...

We investigate the game of peg solitaire on different board shapes, and find those of diamond or rhombus shape have interesting properties. When one peg captures many pegs consecutively , this is called a sweep. Rhombus boards of side 6 have the property that no matter which peg is missing at the start, the game can be solved to one peg using a maximal sweep of length 16. We show how to constru...

Experimental results on the electrical characteristics of Hg-alkanethiol/arenethiol-Au molecular junctions are used to develop a physical model for the hysteretic negative-differential resistance NDR for these, and possibly other, metal-molecule-metal junctions. The dependence of the room-temperature current-voltage characteristic on sweep direction and sweep rate is examined. Based on several ...

Sweeping has become the workhorse algorithm for creating conforming hexahedral meshes of complex models. This paper describes progress on the automatic, robust generation of MultiSwept meshes in CUBIT. MultiSweeping extends the class of volumes that may be swept to include those with multiple source and multiple target surfaces. While not yet perfect, CUBIT’s MultiSweeping has recently become m...

It is proposed that the inertial range clustering of small heavy particles in fluid turbulence occurs as a result of the sweep-stick mechanism which causes inertial particles to cluster so as to mimic the clusters of points where the fluid acceleration is perpendicular to the direction of highest contraction between neighboring particles. Direct numerical simulations of inertial particles subje...

Observations of streamwise and crossflow instabilities on swept circular cylinders over a range of inclinations are presented. By considering sweep angles through the full range between the two extremes studied in the literature, we relate the streamwise vorticity of the unswept case (Kestin & Wood, J. Fluid Mech. 44) to the more aggressive crossflow instability at high sweep angles (Poll, J. F...