An atomistic model consistent with a variety of experimental observations is developed for GaN growth by molecular-beam epitaxy. The model is used in Monte Carlo simulation to study the impact of substrate temperature, Ga flux, and V/III (group-V element to group-III element) ratio on growth rate and growth front quality. The growth rate increases with the V/III ratio reaching a saturation valu...

We prove absence of infinite clusters and contours in a class critical constrained percolation models on the square lattice. The configuration is assumed to satisfy certain hard local constraints, but only weak symmetry ergodicity conditions are imposed its law. proofs use new combinatorial techniques exploiting planar duality. Applications include diagonal edges for dimer square-octagon latt...

The goal of this study was to characterize errors involved in obtaining midsagittal tongue contours from two-dimensional ultrasound image sequences. Toward that end, two basic experiments were conducted. First, manual tongue contours were obtained from 1,145 tongue ultrasound images recorded from four speakers during production of the sentence ‘I owe you a yoyo’, and the uncertainty associated ...

This paper presents an enhanced human identification method based on matching both the contours of teeth and the shapes of dental works (DWs) using bitewing radiographs. To reduce teeth matching error due to unsatisfactory alignment of two incomplete tooth contours, we propose an enhanced contour alignment by pruning the outliers from both contours after they are aligned with the original conto...

Equal-loudness-level contours provide the foundation for theoretical and practical analyses of intensity-frequency characteristics of auditory systems. Since 1956 equal-loudness-level contours based on the free-field measurements of Robinson and Dadson [Br. J. Appl. Phys. 7, 166-181 (1956)] have been widely accepted. However, in 1987 some questions about the general applicability of these conto...

PURPOSE: Segmented structures such as targets or organs at risk are typically stored as 2D contours contained on evenly spaced cross sectional images (slices). Contour interpolation algorithms are implemented in radiation oncology treatment planning software to turn 2D contours into a 3D surface, however the results differ between algorithms, causing discrepancies in analysis. Our goal was to c...

Contours have been established in the biological and computer vision literature as a compact yet descriptive representation of object shape. While individual contours provide structure, they lack the large spatial support of region segments (which lack internal structure). We present a method for further grouping of contours in an image using their relationship to the contours of a second, rela...

Projected contours enable Euler diagrams to scale better. They enable the representation of information using less syntax and can therefore increase visual clarity. Here informal reasoning rules are given that allow the transformation of spider diagrams with respect to projected contours. 1 Spider diagrams and projected contours A spider diagram [3] is an Euler diagram with plane trees (spiders...