An algorithm is presented which finds the first intersection of a directed semi‐infinite straight‐line
(called ray) with an octree, without resorting to the evaluation of neighbouring nodes. …

Filling by quadrants or by octants is shown to be executable in time proportional to the lenght
of the border multiplied by n, the logarithm of the diameter of the image. The underlying …

Given a linear quadtree forming a region's contour, an algorithm is presented to determine
all the pixels 4-connected to the border's elements. The procedure, based on a connectivity …

Now in its third edition, this leading introduction to ethnography has been thoroughly updated
and substantially rewritten. It offers a systematic introduction to ethnographic principles …

… During all three of his terms as Multnomah County superintendentof schools, Atkinson …
Atkinson as an intelligent commentator on many other topics. During the years Atkinson spent …

A linear oct-tree can be mapped into its three-dimensional border-representation by the
repeated elimination of the internal boundaries existing between any two nodes. This paper …

Given a 2-dimensional black-and-white digital picture it is sometimes of interest to determine
all the black components (together with the number of white holes in each one) and …

… Atkinson, JM 1990. How gender makes a difference in Wana society. In Power and …
Harvey, YS 1980. Possession sickness and women shamans in Korea. In Unspoken Worlds: …

… Marxism and uneven development Globalization and class Harvey and the 'spatial fix' … The
right of Will Atkinson to be identified as Author of this Work has been asserted in accordance …

In this article we examine elite formation in relation to money power within the city of London.
Our primary aim is to consider the impact of the massive concentration of such power upon …