Search results for "REPRESENTATION"
showing 10 items of 1710 documents
Distinguishing between two crus : as easy as picking the right side ? : Effect of expertise on conceptual and perceptual representations of Beaujolai…
2017
Expertise was studied in cognitive psychology in order to understand the psychological mechanisms and the abilities involved in various areas of expertise. In the wine field, the few studies conducted on expertise suggest that the knowledge representation of experts is organized around “prototypes” derived from wines of different colours or grape varieties. The general purpose of this thesis was to address 1) theoretical questions about knowledge representation of wines among experts and novices, and 2) wine industry questions about Beaujolais wine perceptions. To this end, the effect of expertise on knowledge representations of wines was evaluated by comparing the performance of three diff…
Distinguishing between two crus : as easy as picking the right side ? : Effect of expertise on conceptual and perceptual representations of Beaujolai…
2017
L’expertise a été étudiée en psychologie cognitive afin de comprendre les mécanismes psychologiques et les compétences intervenant dans différents domaines d’expertise. Dans le domaine du vin, les quelques études menées suggèrent que les experts organiseraient leurs connaissances autour de « prototypes » de couleur ou de cépage. L’objectif général de cette thèse visait à répondre aux questionnements théoriques concernant les représentations des vins d’experts et de novices, ainsi qu’aux questionnements de la filière concernant les perceptions des vins du Beaujolais. Pour cela, l’effet de l’expertise sur les représentations des vins a été évalué en comparant les performances de trois panels …
Frequency-Sliding Generalized Cross-Correlation: A Sub-Band Time Delay Estimation Approach
2020
The generalized cross correlation (GCC) is regarded as the most popular approach for estimating the time difference of arrival (TDOA) between the signals received at two sensors. Time delay estimates are obtained by maximizing the GCC output, where the direct-path delay is usually observed as a prominent peak. Moreover, GCCs play also an important role in steered response power (SRP) localization algorithms, where the SRP functional can be written as an accumulation of the GCCs computed from multiple sensor pairs. Unfortunately, the accuracy of TDOA estimates is affected by multiple factors, including noise, reverberation and signal bandwidth. In this paper, a sub-band approach for time del…
Rational supershapes for surface reconstruction
2007
Simple representation of complex 3D data sets is a fundamental problem in computer vision. From a quality control perspective, it is crucial to use efficient and simple techniques do define a reference model for further recognition or comparison tasks. In this paper, we focus on reverse engineering 3D data sets by recovering rational supershapes to build an implicit function to represent mechanical parts. We derive existing techniques for superquadrics recovery to the supershapes and we adapt the concepts introduced for the ratioquadrics to introduce the rational supershapes. The main advantage of rational supershapes over standard supershapes is that the radius is now expressed as a ration…
Il Caffè Arabo alla IV Esposizione Nazionale di Palermo: dai disegni di Ernesto Basile alla ricostruzione virtuale
2016
A partire dalla rilettura di disegni originali di progetto e riproduzioni grafiche d’epoca, il contributo indaga il caffè arabo progettato da Ernesto Basile per la IV Esposizione Nazionale di Palermo. Il presente studio rientra nel filone delle ricostruzioni virtuali di architetture non più esistenti o solo disegnate e si configura quale tassello mancante di un lavoro più ampio e già edito riguardante la maggior parte del complesso espositivo. La ricostruzione virtuale si connota quale strumento di indagine e visualizzazione di un’architettura effimera, in una parte di città perduta. This text studies the project for the Caffé Arabo designed by Ernesto Basile for the IV Esposizione Nazional…
Representación escolar de los espacios rurales: una investigación didáctica mediante métodos mixtos
2021
Los espacios rurales son objeto de representación histórica desde un relato homogéneo que no ha sido cuestionado en la geografía escolar y afecta a las explicaciones que realiza el alumnado de Educación Secundaria y Bachillerato. La teoría de las representaciones sociales y su relación con el espacio subjetivo permiten comprender las concepciones escolares del alumnado de diez centros escolares de la provincia de Valencia (España) acerca de los espacios rurales. Mediante un enfoque dual (estructural y procesual) que se acompaña de técnicas cualitativas y cuantitativas aplicadas al campo de la didáctica de las ciencias sociales se pretende diagnosticar los elementos que forman la cosmovisión…
Bezier curves approximation of triangularized surfaces using SVG
2006
This paper presents a technique to convert surfaces, obtained through a Data Dependent Triangulation, in Bezier Curves by using a Scalable Vector Graphics File format. The method starts from a Data Dependent Triangulation, traces a map of the boundaries present into the triangulation, using the characteristics of the triangles, then the estimated barycenters are connected, and a final conversion of the resulting polylines in curves is performed. After the curves have been estimated and closed the final representation is obtained by sorting the surfaces in a decreasing order. The proposed techniques have been compared with other raster to vector conversions in terms of perceptual quality.
El SandBox, una aplicación de representación espacial de realidad aumentada de interés para el aprendizaje de la geografía
2022
La SandBox est une technologie développée par l’UC Davis qui permet de modéliser des terrains en réalité augmentée. Il s’agit d’un système permettant de sculpter dans le sable un paysage qui va être topographié par l’ordinateur. Une carte d’élévation (2D), composée de courbes et de couleurs, est projetée dans l’espace d’expérimentation (3D). L’opération se fait en direct, ce qui permet une grande interactivité. Les représentations bidimensionnelles (carte 2D) ne permettent pas toujours une bonne perception de l’espace (3D) représenté, cependant cet article souligne comment utiliser la SandBox pour pallier aux difficultés rencontrées lors de la lecture de ces représentations. Il détaille com…
A facile method to determine pore size distribution in porous scaffold by using image processing
2015
Abstract Image processing permits scientists to investigate morphological properties of three-dimensional structures starting from their bi-dimensional gray-scale representation. In many cases porous structure with complex architecture has to be designed in order to attempt specific properties such in the case of scaffold for tissue engineering. Traditional morphological characterization, like scanning electron microscopy, should be coupled with quantitative information such as pore size distribution (PSD) in order to get a deeper understanding of the influence of the porous structure on tissue regeneration processes and on other related applications, it is remarkable to study a quantitativ…