Search results for "COD"

Spatio-Chromatic Adaptation via Higher-Order Canonical Correlation Analysis of Natural Images

2014

Independent component and canonical correlation analysis are two general-purpose statistical methods with wide applicability. In neuroscience, independent component analysis of chromatic natural images explains the spatio-chromatic structure of primary cortical receptive fields in terms of properties of the visual environment. Canonical correlation analysis explains similarly chromatic adaptation to different illuminations. But, as we show in this paper, neither of the two methods generalizes well to explain both spatio-chromatic processing and adaptation at the same time. We propose a statistical method which combines the desirable properties of independent component and canonical correlat…

Learning vector quantization with alternative distance criteria

2003

An adaptive algorithm for training of a nearest neighbour (NN) classifier is developed in this paper. This learning rule has some similarity to the well-known LVQ method, but uses the nearest centroid neighbourhood concept to estimate optimal locations of the codebook vectors. The aim of this approach is to improve the performance of the standard LVQ algorithms when using a very small codebook. The behaviour of the learning technique proposed here is experimentally compared to those of the plain k-NN decision rule and the LVQ algorithms.

Steiner systems and configurations of points

2020

AbstractThe aim of this paper is to make a connection between design theory and algebraic geometry/commutative algebra. In particular, given any Steiner SystemS(t, n, v) we associate two ideals, in a suitable polynomial ring, defining a Steiner configuration of points and its Complement. We focus on the latter, studying its homological invariants, such as Hilbert Function and Betti numbers. We also study symbolic and regular powers associated to the ideal defining a Complement of a Steiner configuration of points, finding its Waldschmidt constant, regularity, bounds on its resurgence and asymptotic resurgence. We also compute the parameters of linear codes associated to any Steiner configur…

2016

The neural systems supporting speech and sign processing are very similar, although not identical. In a previous fTCD study of hearing native signers (Gutierrez-Sigut, Daws, et al., 2015) we found stronger left lateralization for sign than speech. Given that this increased lateralization could not be explained by hand movement alone, the contribution of motor movement versus ‘linguistic’ processes to the strength of hemispheric lateralization during sign production remains unclear. Here we directly contrast lateralization strength of covert versus overt signing during phonological and semantic fluency tasks. To address the possibility that hearing native signers’ elevated lateralization ind…

Grandmother cells: much ado about nothing

2016

International audience; We do not dispute the possibility of the existence in the brain of “grandmother cells”, which are very finely tuned neurons that fire only in the presence of specific objects or categories. However, we question the causal efficacy of such neurons at the functional or behaviour level. We claim that, even though very familiar items, such as “my grandmother”, may well have associated grandmother neurons, these neurons have very little, or no impact on the actual recognition of my grandmother. A study by Thomas, Van Hulle, and Vogels [(2002). Encoding of categories by noncategory-specific neurons in the inferior temporal cortex. Journal of Cognitive Neuroscience, 13, 190…

Efectos graduales de la sonorización en las lenguas romances 55-82

2016

The aim of this paper is to present the synchronic effects of voicing assimilation in Romance languages and analyze the principles - the regularities - that underlie the observed variation. As the exegesis of the phenomenon will be determined by the application domain within a word or between words and their gear with changes affecting obstructing in coda position and in attack, we aim, firstly, to show the common features of the assimilation phenomena

Bilingual practices and the social organisation of video gaming activities

2010

Abstract Grounded in the interactional paradigm for the study of bilingual language use, this paper investigates how players engaged in a collaborative game-playing activity orient to the co-presence of two languages in the setting and deploy bilingual resources in organising their action and participation. The analysis aims to demonstrate how a particular kind of ‘bilingual order’ ( Cromdal, 2005 ) is co-constructed in which the players use their native language (Finnish) for interaction with each other, but systematically draw on the language of the game in constructing their turns as recognisable and building their alignments with respect to activities under way. The analysis highlights …

Aproximación al léxico del turismo activo: codificación lexicográfica, formación y variación denominativa

2015

En el presente artículo se describe el léxico que conforma el llamado turismo activo del español europeo y se analiza desde tres puntos de vista: su codificación lexicográfica, contrastando el diccionario de la Real Academia Española con diccionarios descriptivos; la formación de sus unidades, que abarca el fenómeno del préstamo y los distintos mecanismos de creación de palabras; y, en tercer lugar, la variación formal y denominativa que caracteriza este vocabulario. El corpus de voces y de muestras de uso ha sido extraído de Internet, en concreto de determinadas fuentes legislativas disponibles en la red y de diferentes páginas web promocionales. Igualmente, se han tomado como referencia d…

REVIEWS - Barbara E. Bullock & Almeida Jacqueline Toribio (eds.), The Cambridge handbook of linguistic code-switching (Cambridge Handbooks in Lin…

2010

The reflexivity of human languaging and Nigel Love's two orders of language

2017

Abstract Nigel Love's distinction between first-order language and second-order language exposes the fallacy of the code view of linguistic communication. Persons do not ‘use’ the forms that are said to constitute a pre-existing language system; they adapt and shape their bodily behaviour, including their vocalizing, in accordance with community-level norms and practices that have historical continuity and thus define the cultural-historical traditions of a community. Individuals normatively orient to these continuities and self-reflexively engage in forms of situated appropriation of them as they flexibly adapt them to the requirements of situations in the pursuance of their goals. Love ha…