L’objet des systèmes de recherche d’informations est de faciliter l’accès à un ensemble de documents, afin de permettre à l’utilisateur de retrouver ceux qui sont pertinents, c'est-à-dire ceux dont le contenu correspond le mieux à son besoin en information. La qualité des résultats de la recherche se mesure en comparant les réponses du système avec les réponses idéales que l'utilisateur espère recevoir. Plus les réponses du système correspondent à celles que l'utilisateur espère, plus le système est jugé performant. Les premiers systèmes permettaient d’effectuer des recherches booléennes, c’est à dire, des recherches ou seule la présence ou l’absence d’un terme de la requête dans un texte permet de le sélectionner. Il a fallu attendre la fin des années 60, pour que l’on applique le modèle vectoriel aux problématiques de la recherche d’information. Dans ces deux modèles, seule la présence, l’absence, ou la fréquence des mots dans le texte est porteuse d’information. D’autres systèmes de recherche d’information adoptent cette approche dans la modélisation des données textuelles et dans le calcul de la similarité entre documents ou par rapport à une requête. SMART (System for the Mechanical Analysis and Retrieval of Text) [4] est l’un des premiers systèmes de recherche à avoir adopté cette approche. Plusieurs améliorations des systèmes de recherche d’information utilisent les relations sémantiques qui existent entre les termes dans un document. LSI (Latent Semantic Indexing) [5], par exemple réalise ceci à travers des méthodes d’analyse qui mesurent la cooccurrence entre deux termes dans un même contexte, tandis que Hearst et Morris [6] utilisent des thésaurus en ligne pour créer des liens sémantiques entre les termes dans un processus de chaines lexicales. Dans ces travaux nous développons un nouveau système de recherche qui permet de représenter les données textuelles par des signaux. Cette nouvelle forme de représentation nous permettra par la suite d’appliquer de nombreux outils mathématiques de la théorie du signal, tel que les Transformées en ondelettes et jusqu’a aujourd’hui inconnue dans le domaine de la recherche d’information textuelle / The object of information retrieval systems is to make easy the access to documents and to allow a user to find those that are appropriate. The quality of the results of research is measured by comparing the answers of the system with the ideal answers that the user hopes to find. The system is competitive when its answers correspond to those that the user hopes. The first retrieval systems performing Boolean researches, in other words, researches in which only the presence or the absence of a term of a request in a text allow choosing it. It was necessary to wait for the end of the sixties to apply the vector model in information retrieval. In these two models, alone presence, absence, or frequency of words in the text is holder of information. Several Information Retrieval Systems adopt a flat approach in the modeling of data and in the counting of similarity between documents or in comparison with a request. We call this approach ‘bag of words ’. These systems consider only presence, absence or frequency of appearance of terms in a document for the counting of its pertinence, while Hearst and Morris [6] uses online thesaurus to create semantic links between terms in a process of lexical chains. In this thesis we develop a new retrieval system which allows representing textual data by signals. This new form of presentation will allow us, later, to apply numerous mathematical tools from the theory of the signal such as Wavelets Transforms, well-unknown nowadays in the field of the textual information retrieval

Cette recherche exploratoire sur l’équité socio-économique de confort pédagogique vise à comprendre la problématique du faible rendement du système scolaire des Seychelles. Elle met l’accent sur l’équité du système en se basant sur la performance scolaire des élèves au sein des écoles primaires et secondaires aux Seychelles. L’objectif est de faire un état de lieu de l’équité socio-économique de confort pédagogique aux Seychelles. Ainsi à partir d’un corpus de 74 textes constitués pour l’essentiel de rapports ministériels nous avons réalisé une analyse documentaire (Cellard, 1997 ; Gauthier, 2009 ; Poupart et al., 1997) qui a permis de dégager quelques caractéristiques de la situation de l’école Seychelloise par rapport à la mise en œuvre de l’équité. Une analyse de la quantité et la qualité des enseignants, des stratégies pédagogiques déployées en salle de classe et l’évaluation des apprentissages montre que le système éducatif Seychellois a encore du chemin à faire pour couvrir convenablement les attentes en matière d’équité socio-économique de confort pédagogique, envisagée sous l’angle de la conceptualisation de Sall et De Ketele (1997). Ce constat majeur d’une faiblesse plus générale du système éducatif Seychellois par rapport à cette forme d’équité nous a amenée à faire diverses recommandations, tant en ce qui concerne les directions d’établissement qui devraient réajuster les politiques en matière d’équité ; mais aussi en direction du personnel enseignant plus large, incluant leurs formateurs, appelés à traduire en actes concrets l’équité en classe et dans les relations avec les élèves. Celui-ci comme on le verra requiert à la fois un travail de différenciation pour soutenir et accompagner les élèves en fonction de leurs besoins d’apprentissage, mais aussi un travail de régulation et d’ajustement continue des stratégies d’enseignement et d’évaluation pour les aligner sur une norme de justice sociale. / This exploratory research on socio-economic equity of educational comfort aims to understand the problem related to the low performance of the Seychelles educational system. It emphasizes the fairness of the system based on the academic performance of students in primary and secondary schools in Seychelles. The aim is to assess the socio-economic equity of educational comfort in the Seychelles. Thus, from a corpus of 74 texts comprised mainly of ministerial reports, we carried out a documentary analysis (Cellard, 1997; Gauthier, 2009; Poupart et al., 1997) which made it possible to identify some characteristics of the situation regarding schools in Seychelles in relation to the implementation of equity. An analysis of the quantity and quality of teachers, of the pedagogical strategies deployed in the classroom and how students are being assessed shows that the Seychelles education system still has a few milestones to cover adequately the expectations in terms of socio-economic equity of pedagogical comfort, considered from the angle of the conceptualization of Sall and De Ketele (1997). This major finding in regards to the general weakness of the Seychelles education system in relation to this form of equity led us to make various recommendations both towards the school administrators who should readjust policies in place based on equity, also the teaching staff, including their education trainer, who are called upon to translate equity in their classrooms and the way they interact with their students. As we will see, this requires applying differentiation techniques to support and accompany the students according to their learning needs, and also it involves that teachers regulate and continuously adjust their teaching and evaluation strategies to align with a standard of social justice.

Esta pesquisa teve como objetivo gerar uma reflexão no campo dos Estudos da Linguagem e da Ciência da Informação com o propósito de investigar a natureza e o funcionamento das Linguagens Documentárias. Foi na Linguística da Enunciação e nos Estudos de Terminologia que se buscou referencial para esta investigação. Os principais teóricos desta pesquisa são: Benveniste, Martins, Cabré, Hoffmann e Ciapuscio. Fundamentado neste referencial foi possível apresentar duas propostas: sugerir um modelo de comunicação capaz de representar a relação que se estabelece entre Sistemas de Recuperação da Informação e usuários a partir de parâmetros enunciativos, e propor a geração de vocabulários controlados especializados sob o referencial enunciativo e terminológico. Estas propostas são fundamentadas nos seguintes conceitos e noções: enunciação, linguagem, língua, estrutura, sentido, significado, referência, contexto, subjetividade, intersubjetividade, locutor e categorias de pessoa, espaço e tempo, no quadro teórico da Teoria da Enunciação; 2) comunicação especializada, linguagem especializada, texto especializado, unidade terminológica, unidade fraseológica especializada e variação terminológica conceitual e denominativa, no domínio dos estudos terminológicos; 3) organização do conhecimento e representação da informação, linguagens documentárias, sistema nocional, vocabulários controlados, análise documentária, tesauros, ontologias, Sistemas de Recuperação da Informação e comunicação documentária. Concluiu-se ser possível estabelecer uma interface produtiva entre os Estudos da Linguagem e Ciência da Informação, com benefício para ambos. / The aim of this research is to generate a reflection in the field of Language Studies and Information Science in order to investigate the nature and the functioning of Documentary Languages. The referencial for this investigation comes from Linguistics of Enunciation and from Terminological Studies, mainly of Benveniste, Martins, Cabré, Hoffmann and Ciaspuscio. Based on this referential it was possible to present two proposals: to suggest a communication model able to represent the relationship established between Information Retrieval Systems and users through its enunciative parameters, and propose the generation of domain-specific controlled vocabularies under the enunciative and terminological referential. These proposals are based on the concepts and notions: 1) enunciation, language, langue, structure, meaning, significance, reference, context, subjectivity, intersubjectivity, speaker and categories of person, space and time, in the theoretical framework of the Theory of Enunciation; 2) specialized communication, specialized language, specialized text, terminological unit, specialized phraseological unit, terminological variation conceptual and denominative, in the area of terminological studies; 3) knowledge organization and representation of information, documentary languages, system notional, controlled vocabularies, documentary analysis, thesauri, ontologies, Information Retrieval Systems and documentary communication. It was concluded to be possible to establish a productive interface between Language Studies and Information Science, with benefit to both.

Esta pesquisa teve como objetivo gerar uma reflexão no campo dos Estudos da Linguagem e da Ciência da Informação com o propósito de investigar a natureza e o funcionamento das Linguagens Documentárias. Foi na Linguística da Enunciação e nos Estudos de Terminologia que se buscou referencial para esta investigação. Os principais teóricos desta pesquisa são: Benveniste, Martins, Cabré, Hoffmann e Ciapuscio. Fundamentado neste referencial foi possível apresentar duas propostas: sugerir um modelo de comunicação capaz de representar a relação que se estabelece entre Sistemas de Recuperação da Informação e usuários a partir de parâmetros enunciativos, e propor a geração de vocabulários controlados especializados sob o referencial enunciativo e terminológico. Estas propostas são fundamentadas nos seguintes conceitos e noções: enunciação, linguagem, língua, estrutura, sentido, significado, referência, contexto, subjetividade, intersubjetividade, locutor e categorias de pessoa, espaço e tempo, no quadro teórico da Teoria da Enunciação; 2) comunicação especializada, linguagem especializada, texto especializado, unidade terminológica, unidade fraseológica especializada e variação terminológica conceitual e denominativa, no domínio dos estudos terminológicos; 3) organização do conhecimento e representação da informação, linguagens documentárias, sistema nocional, vocabulários controlados, análise documentária, tesauros, ontologias, Sistemas de Recuperação da Informação e comunicação documentária. Concluiu-se ser possível estabelecer uma interface produtiva entre os Estudos da Linguagem e Ciência da Informação, com benefício para ambos. / The aim of this research is to generate a reflection in the field of Language Studies and Information Science in order to investigate the nature and the functioning of Documentary Languages. The referencial for this investigation comes from Linguistics of Enunciation and from Terminological Studies, mainly of Benveniste, Martins, Cabré, Hoffmann and Ciaspuscio. Based on this referential it was possible to present two proposals: to suggest a communication model able to represent the relationship established between Information Retrieval Systems and users through its enunciative parameters, and propose the generation of domain-specific controlled vocabularies under the enunciative and terminological referential. These proposals are based on the concepts and notions: 1) enunciation, language, langue, structure, meaning, significance, reference, context, subjectivity, intersubjectivity, speaker and categories of person, space and time, in the theoretical framework of the Theory of Enunciation; 2) specialized communication, specialized language, specialized text, terminological unit, specialized phraseological unit, terminological variation conceptual and denominative, in the area of terminological studies; 3) knowledge organization and representation of information, documentary languages, system notional, controlled vocabularies, documentary analysis, thesauri, ontologies, Information Retrieval Systems and documentary communication. It was concluded to be possible to establish a productive interface between Language Studies and Information Science, with benefit to both.

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Esta pesquisa teve como objetivo gerar uma reflexão no campo dos Estudos da Linguagem e da Ciência da Informação com o propósito de investigar a natureza e o funcionamento das Linguagens Documentárias. Foi na Linguística da Enunciação e nos Estudos de Terminologia que se buscou referencial para esta investigação. Os principais teóricos desta pesquisa são: Benveniste, Martins, Cabré, Hoffmann e Ciapuscio. Fundamentado neste referencial foi possível apresentar duas propostas: sugerir um modelo de comunicação capaz de representar a relação que se estabelece entre Sistemas de Recuperação da Informação e usuários a partir de parâmetros enunciativos, e propor a geração de vocabulários controlados especializados sob o referencial enunciativo e terminológico. Estas propostas são fundamentadas nos seguintes conceitos e noções: enunciação, linguagem, língua, estrutura, sentido, significado, referência, contexto, subjetividade, intersubjetividade, locutor e categorias de pessoa, espaço e tempo, no quadro teórico da Teoria da Enunciação; 2) comunicação especializada, linguagem especializada, texto especializado, unidade terminológica, unidade fraseológica especializada e variação terminológica conceitual e denominativa, no domínio dos estudos terminológicos; 3) organização do conhecimento e representação da informação, linguagens documentárias, sistema nocional, vocabulários controlados, análise documentária, tesauros, ontologias, Sistemas de Recuperação da Informação e comunicação documentária. Concluiu-se ser possível estabelecer uma interface produtiva entre os Estudos da Linguagem e Ciência da Informação, com benefício para ambos. / The aim of this research is to generate a reflection in the field of Language Studies and Information Science in order to investigate the nature and the functioning of Documentary Languages. The referencial for this investigation comes from Linguistics of Enunciation and from Terminological Studies, mainly of Benveniste, Martins, Cabré, Hoffmann and Ciaspuscio. Based on this referential it was possible to present two proposals: to suggest a communication model able to represent the relationship established between Information Retrieval Systems and users through its enunciative parameters, and propose the generation of domain-specific controlled vocabularies under the enunciative and terminological referential. These proposals are based on the concepts and notions: 1) enunciation, language, langue, structure, meaning, significance, reference, context, subjectivity, intersubjectivity, speaker and categories of person, space and time, in the theoretical framework of the Theory of Enunciation; 2) specialized communication, specialized language, specialized text, terminological unit, specialized phraseological unit, terminological variation conceptual and denominative, in the area of terminological studies; 3) knowledge organization and representation of information, documentary languages, system notional, controlled vocabularies, documentary analysis, thesauri, ontologies, Information Retrieval Systems and documentary communication. It was concluded to be possible to establish a productive interface between Language Studies and Information Science, with benefit to both.