We add an extension called debit arcs to traditional place/transition nets. A debit arc incident upon a transition represents an always true precondition; when the transition fires, a token is subtracted from the place issuing the debit arc, regardless of whether there are any tokens present there

In this paper we describe an advaced segmentation approach for stereo images improving the computation of depth compared to the commonly used straight line segmentation. Using a straight line -- circular arc approximation of chain coded lines, the number of primitives is reduced significantly

composite arc/segment-drawing. We present algo-rithms for constructing composite arc-drawings for trees, series-parallel graphs, planar 3-trees and general planar graphs. In the case where G is a tree, we also introduce an algorithm that realizes the vertices of the composite drawing on a O(n1.81) × n grid

[1] New results from wide-angle seismic data collected parallel to the central Aleutian island arc require an intermediate to mafic composition for the middle crust and a mafic to ultramafic composition for the lower crust and yield lateral velocity variations that correspond to arc segmentation

This work explores the control of fore-arc structure on segmentation of megathrust earthquake ruptures using coastal geomorphic markers. The Arauco-Nahuelbuta region at the south-central Chile margin constitutes an anomalous fore-arc sector in terms of topography, geology, and exhumation, located

feature, but is the result of movement on a very shallow thrust. Detachment of the thrust sheet from the remainder of the upper crust evidently took place along the line of weakness represented by the volcanic arc. The mobile segment may have been the part of the frontal arc that first collided

Arc magmas typically display chemical and petrographic characteristics indicative of crustal input. Crustal contamination can take place either in the mantle source region or as magma traverses the crust (e.g. [1]). While source contamination is generally considered the dominant process (e.g. [2, 3

in this paper: they rely on data and sources presented in the updated version of my trilogy (Castells 2000a). For the sake of clarity, I will rst present the conceptual framework I use in my analysis of social structure. I will then proceed to enumerate the main transformations taking place in social structures

As processors continue to exploit more instruction level parallelism, a greater demand is placed on reducing the effects of memory access latency. In this paper, we introduce a novel modification of the processor pipeline called memory renaming. Memory renaming applies register access techniques

Let Ɣ be a collection of unbounded x-monotone Jordan arcs intersecting at most twice each other, which we call pseudoparabolas, since two axis parallel parabolas intersect at most twice. We investigate how to cut pseudoparabolas into the minimum number of curve segments so that each pair