منابع مشابه
Query Processing in the ROL
The ROL system is a novel deductive object-oriented database system that has been implemented at the University of Regina. It provides a uniform rule-based declarative language for deening, manipulating and querying databases, which integrates important features of deductive databases and object-oriented databases. It supports object identity, complex objects, classes, class hierarchies, multip...
متن کاملRoger Clarke
The search for viable eBusiness models continues. But important information is being overlooked. Discussions of open source software all too often focus on the limited context of Microsoft appearing to feel threatened by what it portrays as unbusinesslike competition from Linux and OpenOffice.org; whereas that debate is merely one small facet of the whole. Moreover, in addition to software, a g...
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Hawkins introduced a probabilistic version of Erathosthenes’ sieve and studied the associated sequence of random “primes” (pk)k≥1. Using various probabilistic techniques, many authors have obtained sharp results concerning these random “primes”, which are often in agreement with certain classical theorems or conjectures for prime numbers. In this paper, we prove that the number of integers k ≤ ...
متن کاملPatrice Quinton , Sanjay Rajopadhye , Tanguy Risset
We address the problem of computation upon Z Z-polyhedra which are intersections of polyhedra and integral lattices. We introduce a canonic representation for Z Z-polyhedra which allow to perform comparisons and transformations of Z Z-polyhedra with the help of a computational kernel on polyhedra. This contribution is a step toward the manipulation of images of polyhedra by aane functions, and ...
متن کاملRoger Hanlon
Megadamania The global desire to develop energyhungry industries and Western lifestyles, combined with the necessity to do so without further increasing the use of fossil fuels, has led to a massive spree of dam building around the world. A recent assessment by Christiane Zarfl from the Leibniz Institute of Freshwater Ecology and Inland Fisheries at Berlin, Germany, and colleagues estimates tha...
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ژورنال
عنوان ژورنال: Cahiers d’histoire. Revue d’histoire critique
سال: 2007
ISSN: 1271-6669,2102-5916
DOI: 10.4000/chrhc.293