he meeting of forest and field is an ecotone--the juxtaposition of two structurally and compositionally different ecosystems. Ecotones exist at several spatial scales, ranging from local-scale edges between patches of different habitat o continental-scale transitions between major biomes. The transitions between adjacent ecosystems may be gradual or abrupt. So-called inherent edges occur as a r...

This paper presents insertions-only algorithms for maintaining the exact and/or approximate size of the minimum edge cut and the minimum vertex cut of a graph. The algorithms output the approximate or exact size k in time O(1) and a cut of size k in time linear in its size. For the minimum edge cut problem and for any 0 < 1, the amortized time per insertion is O(1= ) for a (2 + )-approximation,...

BACKGROUND This study aimed to assess the spatial variation in physicochemical properties within individual mangos, as well as to investigate the influence of initial ripeness level on physicochemical characteristics of fresh-cut mangos. Individual mangos were evaluated at 12 specific flesh positions in the inner and outer sides. Mango cubes of 1.5 cm prepared from three firmness stages were mo...

I have tested two contending views of chromosome-to-pole movement in anaphase. Chromosomes might be pulled poleward by a traction fiber consisting of the kinetochore microtubules and associated motors, or they might propel themselves by a motor in the kinetochore. I cut through the spindle of demembranated grasshopper spermatocytes between the chromosomes and one pole and swept the polar region...

For a large class of irregular grid applications, the structure of the mesh changes from one phase of the computation to the next. Eventually, as the graph evolves, the adapted mesh has to be repartitioned to ensure good load balance. If this new graph is partitioned from scratch, it will lead to an excessive migration of data among processors. In this paper, we present two new schemes for comp...

This Letter deals with an analysis of bending edge waves propagating along the free edge of a Kirchhoff plate supported by a Winkler foundation. The presence of a foundation leads to a non-zero cut-off frequency for this wave, along with a local minimum of the associated phase velocity. This minimum phase velocity corresponds to a critical speed of an edge moving load and is analogous to that i...

This literature review attempts to provide a brief overview of some of the most common segmentation techniques, and a comparison between them. It discusses the “Grab-Cut” technique, and reviews some some of the common matting techniques. The graph cut approaches to segmentation can be extended to 3-D data and can be used for segmenting 3-D volumes. Other segmentation techniques use either conto...

Abstract Edges in the graph associated with a square matrix over field may be classified as to how their removal affects multiplicity of an identified eigenvalue. There are five possibilities: + 2 +2 (2-Parter); 1 +1 (Parter); no change (neutral); − -1 (downer); and -2 (2-downer)....

Let an edge cut partition the vertex set of the n-cube into k subsets A1, ..., Ak with ||Ai| − |Aj || ≤ 1. We consider the problem to determine minimal size of such a cut and present its asymptotic as n, k → ∞ and also as n → ∞ and k is a constant of the form k = 2a ± 2b with a ≥ b ≥ 0.

12 We analyze spectral graph theory based image segmentation algorithms and 13 show there is a natural connection with edge preserving filtering. Based on 14 this connection we show that the normalized cut algorithm is equivalent to 15 repeated application of bilateral filtering. Then, using this interpretation we 16 present and implement a fast normalized cut algorithm. Experiments show 17 tha...