Search results for "REPRESENTATION"

EMG artifacts removal during electrical stimulation, a CWT based technique

2014

International audience; A technique of artifacts removal based on the continuous wavelet transform is presented. It uses common mother wavelets to find the temporal localization of stimulation artifacts on electromyogram (EMG) signal during an electrically evoked contraction of a muscle. This method can be used with standard stimulation pulse waveforms like monophasics or biphasics ones. It uses a histogram representation to find the best threshold to apply on the CWT domain. The algotithm is presented with Haar wavelet and then it is used with common wavelet famillies such as Daubechies or Symlets.

Identity dynamics and social partitions : the case of identity "racial" Blacks in France

2011

Our research work investigates - from a psycho-social point of view - the «racial» identity of the black population in France, notably in their relation with the white population, so as to point up the identity dynamics that exist between the various groups. The theoretical framework is related to social grouping and one of its developments, i.e. the concept of social partitioning. Such conception is based on the existence of several types of inter-category relations (partitioning) that allow apprehending the nature of individuals’ identity positioning within the framework of an inter-group relation and make it dynamic through the notion of co-construction. Our methodology is based mainly o…

Nel cyberspazio. Visioni urbane delle giga-città

2015

L’autrice riflette sulle immagini delle giga-città, o smart cities, attualmente in fase di costruzione in aree completamente desertiche dell’India, dell’Africa, del Nuovo Messico, della Cina e degli Emirati Arabi, che strutturano i propri spazi con codici della rappresentazione rapportati alla dimensione del cyberspazio. Il disegno urbano di queste città digitali si caratterizza per gli avveniristici volumi architettonici, per le sperimentazioni tecnologiche e per la lettura attraverso layer delle piattaforme virtuali e delle infrastrutture trasparenti. The author reflects on the images of giga-cities, or smart cities, currently under construction in completely desert areas in India, Africa…

Do the right thing! A study on social representation of obedience and disobedience

2014

Abstract The present research is aimed at investigating through a mixed-method approach the dimensions underlying the psychosocial constructs of obedience, disobedience and the relations between them. To this end, we consider the attitudes toward (dis)obedience being socially constructed, and we chose the theory of social representations (Abric, 2003; Moscovici, 1961) as the theoretical framework of this study. The data, collected on a sample of 190 individuals, allowed us to define these social objects, reducing both their complexity and polysemy. Obedience and disobedience were both seen by research participants as context-dependent behaviours, neither positive nor negative, per se . Also…

Building Semantic Trees from XML Documents

2016

International audience; The distributed nature of the Web, as a decentralized system exchanging information between heterogeneous sources, has underlined the need to manage interoperability, i.e., the ability to automatically interpret information in Web documents exchanged between different sources, necessary for efficient information management and search applications. In this context, XML was introduced as a data representation standard that simplifies the tasks of interoperation and integration among heterogeneous data sources, allowing to represent data in (semi-) structured documents consisting of hierarchically nested elements and atomic attributes. However, while XML was shown most …

Curating as placing stones to be picked up: Interview with Anne-Cécile Sibué-Birkeland

2021

Ermeneutica del segno cinetico. Disegno e danza

2016

Le recenti innovazioni scientifiche e gli studi delle scienze cognitive costituiscono un punto di riferimento per la ricerca artistica che, impiegando diversificate metodologie di interpretazione grafica, si apre verso nuove forme della rappresentazione. L’articolo propone alcune riflessioni sulle implicazioni del movimento in relazione allo spazio architettonico con l’obiettivo di riconoscere nella percezione del movimento, configurazioni bidimensionali che misurano lo spazio restituendo nuove informazioni e rapporti grafici: il peso, il colore, la superficie, il disegno. Recent scientific innovations and studies of cognitive science are a reference point for artistic research, which using…

Rappresentazioni vertiginose. Tre esempi: Perec, Lequeu, Douat

2022

Nel novembre del 2009 il Museo del Louvre decise di affidare a Umberto Eco la direzione di una serie di conferenze da tenere su un argomento di sua scelta. Eco scelse il tema della ‘lista’ conferendo a quella manifestazione il nome di Vertige de la liste a cui seguì un saggio dallo stesso titolo pubblicato da Bompiani. Questa breve nota prende in prestito la stessa tematica che, per via del suo carattere altamente ete-rogeneo, è in grado di coinvolgere diversi ambiti del sapere senza minimamente accennare ad esaurirsi. L’elenco, strettamente legato alla figura retorica dell’accumulazione, può infatti costituirsi di segni, parole, suoni e di qualsiasi altra forma di rappresentazione utile a …

Network Entropy for the Sequence Analysis of Functional Connectivity Graphs of the Brain

2018

Dynamic representation of functional brain networks involved in the sequence analysis of functional connectivity graphs of the brain (FCGB) gains advances in uncovering evolved interaction mechanisms. However, most of the networks, even the event-related ones, are highly heterogeneous due to spurious interactions, which bring challenges to revealing the change patterns of interactive information in the complex dynamic process. In this paper, we propose a network entropy (NE) method to measure connectivity uncertainty of FCGB sequences to alleviate the spurious interaction problem in dynamic network analysis to realize associations with different events during a complex cognitive task. The p…

Time operators, innovations and approximations

2003

Abstract We present a new approach to the spectral analysis and prediction of such complex systems for which the time evolution is described by a semigroup of operators. This approach is based on an extended concept of time operator and can be interpreted as a shift representation of dynamical systems. The time operator method includes the multiresolution analysis of wavelets as a particular case but can also be applied for a substantially larger class of dynamical systems. Among the examples where shift representation have been explicitly derived are exact endomorphisms, the diffusion equation, generalized shifts associated with the Haar or Faber–Schauder basis and some classes of stochast…