منابع مشابه
Spécialisation et sous-typage : thème et variations
Class specialization is the most original feature of object orientation, but identifying it to subtyping leads to the well known covariance-contravariance controversy. Type safety requires contravariance while specialization needs covariance. This paper aims to precisely analyse this problem, to show how irreductible it is and the need for type errors. We show that many alternatives as multiple...
متن کاملVariations sur un THème de Aldama et Shelah
We study the definability of certain subgroups of a group G that does not have the independence property. If a (type) definable subset X of an elementary extension G of G has property P , we call its trace X∩G over G an externally (type) definable P set. We show the following. Centralisers of subsets of G are externally definable subgroups. Cores of externally definable subgroups and iterated c...
متن کاملUsing Vision to Guide an Hors d’Oeuvres Serving Robot
This paper describes the vision system used on the robot that took first place in both the technical and popular categories of the 1998 American Association of Artificial Intelligence Hors d’Oeuvres Anyone? competition. The robot used visual input to execute multiple tasks: 1) locate people to serve, 2) determine if someone was reaching for food from the robot’s tray, 3) determine if the person...
متن کاملLa structure thème-rhème pour l'ordonnancement de documents en recherche d'information
RÉSUMÉ. La recherche d’information fait souvent l’hypothèse que les documents pertinents sont ”à propos de” la requête; la requête est ainsi supposée refléter le besoin d’information de l’utilisateur de façon appropriée. La plupart des moteurs de recherche fait l’hypothèse que le fait d’être ”à propos de” peut être mesuré par l’appariement des termes du document et ceux de la requête selon une ...
متن کاملFrom pea soup to hors d'oeuvres: the status of the cook on British merchant ships.
The sea-going cook has often been portrayed as a legendary figure by both contemporaries and writers of maritime fiction. For some, he was the most important — and the most interesting — figure on board: "Ship's cooks not only deserve our attention; they command it, dumbly yet imperiously."1 Yet little historical research has been done on them, even though they were one of the most established ...
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ژورنال
عنوان ژورنال: Revue de l’Université de Moncton
سال: 2007
ISSN: 0316-6368,1712-2139
DOI: 10.7202/038492ar