Search results for "speech"

Coherence between brain activation and speech envelope at word and sentence levels showed age-related differences in low frequency bands

2021

Abstract Speech perception is dynamic and shows changes across development. In parallel, functional differences in brain development over time have been well documented and these differences may interact with changes in speech perception during infancy and childhood. Further, there is evidence that the two hemispheres contribute unequally to speech segmentation at the sentence and phonemic levels. To disentangle those contributions, we studied the cortical tracking of various sized units of speech that are crucial for spoken language processing in children (4.7–9.3 years old, N = 34) and adults (N = 19). We measured participants’ magnetoencephalogram (MEG) responses to syllables, words, and…

Mutual information-based feature selection for low-cost BCIs based on motor imagery

2016

In the present study a feature selection algorithm based on mutual information (MI) was applied to electro-encephalographic (EEG) data acquired during three different motor imagery tasks from two dataset: Dataset I from BCI Competition IV including full scalp recordings from four subjects, and new data recorded from three subjects using the popular low-cost Emotiv EPOC EEG headset. The aim was to evaluate optimal channels and band-power (BP) features for motor imagery tasks discrimination, in order to assess the feasibility of a portable low-cost motor imagery based Brain-Computer Interface (BCI) system. The minimal sub set of features most relevant to task description and less redundant to…

“The war is over”. Militarizing the language and framing the Nation in post-Brexit discourse

2020

This chapter analyzes the militarization of political language in digital contexts in the post-Brexit discourse, and how such militarization, which is often constitutive of hate speech, contributes to framing an “exclusive” concept of the nation whose meaning is reproduced and circulated (as well as challenged) in society. It will address the role of emotions and hate in language in fueling and aggregating online communities around a key political issue, i.e. the Brexit negotiations, and a core cultural and social concept, i.e. the nation. The militarization of language, which is based on certain discursive structures, e.g. war metaphors (Lakoff and Johnson 1980, Musolff 2020), is one of th…

Changing Perceptions of Multiculturalism in the British Public Sphere

2017

This paper is devoted to the examination of the evolution of the uses of the term multiculturalism in a corpus of selected speeches by prominent British politicians, officials and diplomats in the United Kingdom within the decade 2001–2011. Britain is considered to be one of Europe’s most multicultural countries and there was a time when its government took pride in its pro-integration policies. That is why within the elite discourses of the Labour governments of the late 1990s, multiculturalism had overwhelmingly positive connotations: it was associated with new opportunities, strength, enrichment, social progress and economic success. However, over the course of the 2000s there was much d…

Analysis of neuronal networks in the visual system of the cat using statistical signals--simple and complex cells. Part II.

1978

Superimposing additively a two-dimensional noise process to deterministic input signals (bars) the neurons of area 17 show a class-specific reaction for the task of signal extraction. Moving both parts of the signals simultaneously and varying the signal to noise ratio (S/N) the simple cells achieve the same performance as resulted from the psychophysical experiment. Type I complex cells extract moving deterministic signals (i.e. bars) from the stationary noise, whereas in the answers of Type II complex cells the statistical parts of the signals predominate. Considering the different cell types each as a series of a linear and a nonlinear system one obtains the cell specific space-time freq…

Organizational dissent and workplace freedom of speech : a qualitative study of young professional intra-urban migrant workers in Shanghai

2014

Chinese economy reform triggered the largest domestic labor migration in human history. These 150 million migrant workers are treated as second-rate citizens in urban cities because of the discriminatory household registration system: Hukou. Previous studies have predominantly focused on blue-collar migrants while the professional workers, the potential permanent city dwellers, received little attention. This study attempts to fill this gap by exploring the perception of workplace freedom and preference of dissent strategy among professional migrant workers in Shanghai. Eight young and well-educated migrants participated in this study through semi-structured online interviews. This study no…

"Isn't it enough to be a Chinese speaker" : language ideology and migrant identity construction in a public primary school in Beijing

2007

Form factors of the isovector scalar current and the ηπ scattering phase shifts

2015

33 pages.- 14 figures.- v2: Some clarifications and corrections of typos

Evolución de la competencia comunicativa mediante intervención pragmática en retraso del lenguaje: estudio de caso

2021

En el presente trabajo se describe la eficacia de la evaluación e intervención pragmática en un caso de retraso del lenguaje secundario a daño cerebral infantil. La intervención logopédica adoptó un marco teórico de psicolingüística cognitiva funcional y se centró en potenciar las habilidades pragmáticas comunicativas mediante la estimulación de las categorías pragmáticas interactivas en contextos conversacionales naturales. Mediante el PREP-R (Protocolo Rápido de Evaluación Pragmática Revisado) se ha hecho un seguimiento de la orientación comunicativa de los turnos, la predictibilidad, la eficacia comunicativa, la habilidad pragmática (general, específica y gramatical) y los elementos que …

Toll-quality digital secraphone

2002

This paper describes the design and performance of a secraphone that, when plugged between any conventional telephone set and the public telephone network, protects the speech information travelling through the PSTN. The device has a transparent operating mode that does not alter the signal and a secure mode, accessed upon request of any of the speakers, that encrypts the speech with digital techniques, assuring privacy against unwanted listeners. At the transmission branch, voice is sampled, coded with a CELP scheme at 9600 bps (with a slow mode at 7200 bps), encrypted with a proprietary algorithm and interfaced to the line with a V.32 modem chip set. The keys for encryption are establishe…