منابع مشابه
Detecting Fortresses in Chess
We introduce a computational method for semi-automatical detecting fortresses in the game of chess. It is based on computer heuristic search and can be easily used with any state-of-the-art chess program. We also demonstrate a method for avoiding fortresses and show how to find a break-through plan when one exists. Although the paper is not concerned with the question whether it is practical or...
متن کاملReversal Distance without Hurdles and Fortresses
This paper presents an elementary proof of the HannenhalliPevzner theorem on the reversal distance of two signed permutations. It uses a single PQ-tree to encode the various features of a permutation. The parameters called hurdles and fortress are replaced by a single one, whose value is computed by a simple and efficient algorithm.
متن کاملSocial insect symbionts: evolution in homeostatic fortresses.
The massive environmentally buffered nests of some social insects can contain millions of individuals and a wide variety of parasites, commensals and mutualists. We suggest that the ways in which these homeostatic fortress environments affect the evolution of social insect symbionts are relevant for epidemiology, evolutionary biology and macroecology. We contend that specialized parasites will ...
متن کاملArt Galleries, Fortresses, and Prison Yards: Illumination and Color
An art gallery problem asks for the minimum number of guards needed to protect a given geometric object such as a polygon or polyhedron. We emphasize results obtained using coloring arguments graphs. We also introduce a new technique (same-sign graphs) that simplifies the proofs of several known theorems. – This talk is accessible for graduate students in all areas of math, as well as advanced ...
متن کاملThe fortresses of Ejin: an example of outlining a site from satellite images
From 1960's to 1970's, the Chinese Army built some fortified artificial hills. Some of them are located in the Inner Mongolia, Western China. These large fortresses are surrounded by moats. For some of them it is still possible to see earthworks, trenches and ditches, the planning of which could have a symbolic meaning. We can argue this result form their digital outlining, obtained after an im...
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ژورنال
عنوان ژورنال: The Annual of the British School at Athens
سال: 1906
ISSN: 0068-2454,2045-2403
DOI: 10.1017/s0068245400008108