Search results for "REPRESENTATION"

The Development of Visuo-spatial Memory: How to Remember Location

1992

Recent studies on developmental differences in spatial memory have reported equivocal results. Some found an age-dependent improvement of memory performance whereas others did not. The two studies reported here investigate age differences in memory for visual-spatial information. A picture reconstruction task with simultaneous presentation of scene-like visual-spatial arrangements was used. Subjects had to recognise objects and to reconstruct the initial spatial arrangement. The first study with 5to 10year-olds produced the typical age-dependent improvement in recognising visual material as well as in remembering the locations of specific objects. No effect for age was obtained in memory f…

Sistemi integrati per la visualizzazione immersiva

2015

Il disegno dell’architettura ha, tra i suoi obiettivi disciplinari, quello di “far vedere” lo spazio, sia nelle sue declinazioni temporali, sia in quelle descrittive di forme, luce, colori e materiali, caratteri connotativi che cerca di riprodurre grazie a metodi di proiezione codificati e tecniche di rappresentazione in continuo mutamento. Tra le tecniche di rappresentazione informatica la visualizzazione immersiva consente di ruotare lo sguardo, in tempo reale, all’interno di uno spazio, cercando di superare i limiti della rappresentazione piana, simulando la visione sferica dello spazio. La tecnica può essere utilizzata sia per vedere la realtà esistente, tramite immagini fotografiche, s…

Maux de l'économie, mots des économistes

1990

International audience; La méthodologie économique a largement séparé les discours (hypthèses, théorie, corps de pensée) de l'action (représentée essentiellement par les applications ou les descriptions monographiques). Dans cet essai, avec la plus large prudence répondant à une démarche balbutiante, nous tentons de donner des représentations synthétiques, sur longue période, de l'évolution de la littérature économique ; ceci au moyen des méthodes usuelles de l'analyse des données. Il reste, quelque soit les résultats auxquels nous parvenons, que ce type de traintement repose sur l'hypothèse d'avoir pris en compte chaque production de littérature comme un objet statistique simple. L'applica…

Improving Classification of Tweets Using Linguistic Information from a Large External Corpus

2016

The bag of words representation of documents is often unsatisfactory as it ignores relationships between important terms that do not co-occur literally. Improvements might be achieved by expanding the vocabulary with other relevant word, like synonyms.

$$PO^2$$ - A Process and Observation Ontology in Food Science. Application to Dairy Gels

2016

This paper focuses on the knowledge representation task for an interdisciplinary project called Delicious concerning the production and transformation processes in food science. The originality of this project is to combine data from different disciplines like food composition, food structure, sensorial perception and nutrition. Available data sets are described using different vocabularies and are stored in different formats. Therefore there is a need to define an ontology, called \(PO^2\) (Process and Observation Ontology), as a common and standardized vocabulary for this project. The scenario 6 of the NeON methodology was used for building \(PO^2\) and the core component is implemented i…

Conceptual graph operations for formal visual reasoning in the medical domain

2014

International audience; Objective - Conceptual graphs (CGs) are used to represent clinical guidelines because they support visual reasoning with a logical background, making them a potentially valuable representation for guidelines.Materials and methods - Conceptual graph formalism has an essential and basic component: a formal vocabulary that drives all of the other mechanisms, notably specialization and projection. The graph's theoretical operations, such as projection, rules, derivation, constraints, probabilities and uncertainty, support diagrammatic reasoning.Results - A conceptual graph's graphical user interface includes a multilingual vocabulary management, some query and decision-m…

2014

Codebook is an effective image representation method. By clustering in local image descriptors, a codebook is shown to be a distinctive image feature and widely applied in object classification. In almost all existing works on codebooks, the building of the visual vocabulary follows a basic routine, that is, extracting local image descriptors and clustering with a user-designated number of clusters. The problem with this routine lies in that building a codebook for each single dataset is not efficient. In order to deal with this problem, we investigate the influence of vocabulary sizes on classification performance and vocabulary universality with the kNN classifier. Experimental results in…

Ontology languages for the semantic web: A never completely updated review

2006

This paper gives a never completely account of approaches that have been used for the research community for representing knowledge. After underlining the importance of a layered approach and the use of standards, it starts with early efforts used for artificial intelligence researchers. Then recent approaches, aimed mainly at the semantic web, are described. Coding examples from the literature are presented in both sections. Finally, the semantic web ontology creation process, as we envision it, is introduced.

Rethinking Political Representation from the Perspective of Rhetorical Genres

2019

This article is a thought experiment. It constructs ideal types of political representation in the sense of Max Weber. Inspired by Quentin Skinner and others, the aim is to give a rhetorical turn to contemporary debates on representation. The core idea is to claim an ‘elective affinity’ (Wahlverwandschaft, as Weber says following Goethe) between forms of representation and rhetorical genres of their justification. The four ideal types of political representation are designated as plebiscitary, diplomatic, advocatory, and parliamentary, corresponding to the epideictic, negotiating, forensic, and deliberative genres of rhetoric as the respective ways to plausibly appeal to the audience. I dis…

Irreducible components of Hurwitz spaces of coverings with two special fibers

2013

In this paper we prove new results of irreducibility for Hurwitz spaces of coverings whose monodromy group is a Weyl group of type B_d and whose local monodromies are all reflections except two.