This study investigated misconceptions in Algebra of students enrolled for a N2 Engineering certificate at a Further Education and Training College. The study aimed to investigate these students’ misconceptions relating to Algebra which prohibited them to successfully complete their artisanship. The purpose of the research was to determine (i) the nature of these misconceptions, and (ii) the value of screencasts as a technology-enhanced learning (TEL) tool to improve instruction. The research gap that the researcher addressed related to the Mathematics misconceptions that the N2 students had, and whether these misconceptions could be adequately addressed by screencasts. The study method used was a case study design and methodology while simultaneously collecting quantitative and qualitative data. The findings encompassed the determining of main Mathematics misconceptions, producing screencasts, and assessing the screencasts with the intended target group. The study followed a four-phase strategy of testing, interviewing and analysing, and reflection based on qualitative and quantitative research strategies. During the quantitative research the research participants completed a biographical questionnaire, as well as a customised diagnostic Algebra test. The study sample comprised two groups from different trimesters at a rural FET college in the Northern Cape in Kathu, South Africa. The total population of full-time N2 Engineering students related to 113 participants. The diagnostic test comprised twelve questions from the three main Algebra concepts relating to: (i) exponents, (ii) equations, and (iii) factorisation. The same customised diagnostic test confirmed the misconceptions within the same group. Six questions from the customised diagnostic test identified the central misconceptions. The researcher consequently designed, developed, implemented and evaluated screencasts with the intended student population according to the design principles identified during the study. The six questions formed the basis of a second diagnostic test, which was used in phase three with interviews of ten research participants as part of phase 4 of the evaluation of the screencasts. At the end of the second trimester students were ask to complete a questionnaire regarding their use and perceptions of the screencasts—23 participants completed this voluntary questionnaire. At the end of the trimester ten participants were asked to explain their method of calculations during a walk-through evaluation while answering Algebra problems. The results indicated a number of misconception categories: (i) The main reason for misconceptions relating to equations was the participants’ inadequate understandings of the basic concepts of multiply methods used in equations; (ii) Index laws seemed to be the biggest misconception where participants demonstrated insufficient understanding of the laws; and (iii) The participants did not comprehend the basic concepts of factorisation—they could not identify which method to use while factorising. The qualitative findings indicate that the participants found the screencasts valuable when they prepared for tests and examinations, as well as when they did not understanding a basic Mathematics concept. Access to technology in rural areas remains an obstacle to integrate technology learning tools on a large scale at the FET College. / MEd (Curriculum Development), North-West University, Potchefstroom Campus, 2015

Dissertation submitted in fulfilment of the requirements for the Degree in Master of Technology: Education, Durban University of Technology, 2009. / This study investigated key factors impacting on blended learning delivery with particular focus on socio-cultural and human-computer-interface issues, in the hope that the outcome of this enquiry might contribute positively towards the empowerment of learners and facilitators alike. The study involved a group of first year students enrolled in a Communications Skills Course offered by the (then) Department of English and Communication at the Durban University of Technology. The PRINTS Project, a webquest around which the course activities were based, provided an example of a blended delivery course in practice. While the teaching paradigm used in the course was constructivist, the research orientation employed in this project was critical realist. Critical realism focuses on transformation through praxis and also lends itself to modelling, which provides a way to understand the factors at play within a social system. In the preliminary stages of the research, an exploratory empirical (i.e. applied) model of blended learning delivery was formulated from a theoretical model of course delivery in order to assess which factors in blended learning were systemic and which were variables. The investigation then sought to uncover key factors impacting on the blended delivery system, utilising both quantitative and qualitative methodologies. The findings were analysed in terms of the empirical model to gain an understanding of any factors that might be seen to either enhance or inhibit learning in blended delivery mode. The result was that certain core issues in blended learning and teaching could be clarified, including the use, advantages and disadvantages of information and communication technologies (ICTs) in a learning environment. The notion of the digital divide could also be reconceptualised, and the relationship between literacy (be it academic, professional or social), power and culture could be further elucidated, drawing specific attention to the South African educational environment. The notion of iv culture and its relevance in a blended delivery environment was also further clarified, since the findings of this research project suggested how and why certain key socio-cultural factors might impact, as both enhancers and inhibitors, on the blended learning delivery system.

Submitted in fulfillment of the requirements of the Doctor of Philosophy in Library and Information Science: Information and Corporate Management, Durban University of Technology, Durban, South Africa, 2015. / The core interest in blended learning lies in the need to provide more engaged learning experiences while recognizing the potential of ICTs which has a profound impact on all aspects of life including the Library and Information Service (LIS) field. This doctoral study was undertaken with the objective of exploring the educational and pedagogical issues in blended learning for the development of a framework for designing and implementing blended learning in the delivery of LIS curricula in South African universities. The target populations for this study included, LIS educators from higher education institutions in South Africa offering LIS education, LIS students from these institutions exposed to blended learning interventions and facilitators of blended learning (individuals in institutional teaching and learning units) from the various institutions offering LIS education and using blended learning. The study adopted a mixed method research approach using a fully mixed dominant status design to explore and understand the phenomenon of blended learning at a more detailed level by using qualitative follow-up data (for example, interviews with LIS educators and institutional facilitators of blended learning and focus group discussions with LIS students) to explain and explore the results of a largely quantitative Web survey. The theoretical framework that underpinned the study involved various learning theories, learning styles as well as blended learning models relating to the higher education environment. The key findings of the study reveal that blended learning remains a complex concept with no clear consensus on the key components that need to be blended, how much of each component to blend and the criteria that are needed for the interventions to be regarded as blended learning. This flexibility, to an extent, allows for institutions to tailor the concept and maximise the potential of blended learning while still being responsive to the diverse student populations at South African higher institutions. The framework for blended learning in the delivery of LIS curricula at South African universities proposed by this study is generated from the theories informing this study; the literature reviewed; existing frameworks for blended learning such as Khan’s octagonal framework and the Community of Inquiry (CoI) framework; the findings of this study; the researcher’s own educational experiences; and, is grounded in the larger field of higher education. The use of blended learning has the potential to transform LIS education and training by encouraging LIS educators to reflect on their teaching and learning practices and to use the proposed framework as a guideline to design and implement pedagogically sound blended learning interventions for LIS education and training.

L’objectif de cette recherche est d’évaluer l’intégration universitaire des TIC dans l’enseignement des langues étrangères en Palestine : le cas des projets RUFO et QIF. En adoptant un cadre théorique constructiviste, cette étude est effectuée sur trois plans : micro (enseignants et apprenants), méso (dispositifs en ligne) et macro (décideurs de l’université et du Ministère de l’Education). Se basant sur une méthodologie qualitative et compréhensive de recherche, une démarche d’analyse de contenu du triple corpus de données (entretiens, extraits de cours, communication officielle des institutions) a été appliquée. Les résultats illustrent que les pratiques enseignantes actuelles n’ont pas connu d’évolution par suite de l’intégration des TIC ; l’usage de cette nouvelle modalité a amplifié les pratiques directives et traditionnelles existantes et a parfois entrainé une régression par rapport au mode de présentiel. La conclusion principale est qu’il n’est pas possible d’innover sans changer le paradigme éducatif et passer de celui de l'enseignement à celui de l'apprentissage. Le développement de la pédagogie universitaire nécessite la mise en ouvre d’une ingénierie éducative complexe et participative accompagnée par un pilotage bidirectionnel et transversal de l’innovation et une formation-accompagnement des acteurs à tous les niveaux. / The objective of this research is to evaluate the integration of ICT in Palestinian universities for foreign language teaching: the case of RUFO and QIF projects. By adopting a constructivist theoretical approach, this study is conducted on three levels: micro (teachers and students), meso (on line courses) and macro (policy of the university and the Ministry of Education).The research is based on a qualitative and comprehensive methodology. A content analysis was applied to the triple collected data (interviews, excerpts from on line courses, official excerpts) The findings show that current teaching practices have not evolved as a result of the integration of ICT; the use of this new modality has amplified the existing traditional and directive practices; sometimes it has moved them backward. The main conclusion is that it is not possible to innovate without changing the educational paradigm and shifting from a teaching-centered model to a learning- centered one. Development of higher education requires the implementation of: a complex and cooperative educative engineering, a bidirectional and transversal management process of the innovation, and a training-coaching at all levels.

L’objectif de cette étude est d’analyser comment l’enfant de 6 à 13 ans s’approprie la recomposition familiale (Malrieu & Malrieu, 1973 ; Malrieu, 1976) et quels rôles jouent les relations dans la fratrie germaine dans cette appropriation. Notre analyse se fonde sur une approche bioécosystémique (Bronfenbrenner, 1996). Les relations fraternelles sont examinées à partir d’un entretien semi-directif. L’appropriation de la famille recomposée est appréhendée grâce au dessin de la famille, au Kidcope (Spirito, Stark & Williams, 1988), au Child Behavior Checklist (CBCL, Achenbach, 1991) et à l’Autoquestionnaire Qualité de vie-enfant-imagé (AUQEI, Magnificat & Dazord, 1997). Les principaux résultats révèlent que les enfants font des choix électifs des membres de leur famille sur la base des liens biologiques, des personnes significatives dans leur vie et de la qualité des rapports avec leur entourage. Le facteur de stress le plus souvent évoqué par les enfants est le beau-parent et son approche éducative. La stratégie la plus mobilisée et jugée efficace par les enfants réfère au soutien social. Dans l’ensemble les enfants présentent une adaptation socio-affective et une qualité de vie satisfaisante. Au niveau des relations dans la fratrie germaine, il ressort qu’elles sont perçues par la majorité des enfants comme une ressource dans la recomposition familiale, étant à la fois continue et soutenante. Les analyses bivariées indiquent une influence significative des facteurs personnels (âge, sexe), du contexte familial (caractéristiques de la fratrie, mode de garde) et du temps (durée de la recomposition, temps écoulé depuis la séparation) sur l’appropriation de la famille. / The present study investigates how 6 to 13 years old children appropriate their stepfamily/blended family (Malrieu & Malrieu, 1973; Malrieu, 1976) and how sibling relationships might influence that appropriation. Our analysis is based on the bioecological approach (Bronfenbrenner, 1996). Sibling relationships were examined using a semi-directive interview. The appropriation of the stepfamily was investigated on the basis of the drawing of the family, the Kidcope (Spirito, Stark and Williams, 1988), the Child Behavior Checklist (CBCL, Achenbach, 1991) and the “AUtoquestionnaire Qualité de vie-Enfant-Imagé” (AUQEI, Magnificat & Dazord, 1997). Results indicate that children make elective choices of their family members mainly on the basis of their biological relationships, the most important persons influencing their life and the quality of the relationship with their close circle. We shall emphasize that the most stressful factor generally evoked by children usually originates from the stepparent and his educational approach. Furthermore, the results show that social support appears as the most efficient strategy often used by the children. Generally, we noticed a satisfying socio-emotional adaptation and life quality of the sampled children. Mostly, the relationships among siblings are found as a resource within their stepfamily as long as those relationships are both sustained and supportive. Cross-correlated statistical analysis of the data showed significant influence of person characteristics (age, sex), family context (sibling characteristics, child custody) and time factors (elapsed time since separation, duration of the second union) on the appropriation of family.

O uso de tecnologias digitais de informação e comunicação tem alterado a sociedade e seu emprego tem estimulado o debate na esfera pedagógica. A incorporação de tecnologias na educação pode ser considerada uma ferramenta facilitadora para transmissão de conhecimento ao aluno. O objetivo deste estudo de caso é identificar os desafios encontrados e as propostas de superação apresentadas. Buscou-se ainda analisar a satisfação e a usabilidade do ambiente virtual de aprendizagem (AVA) e dos materiais didáticos nele disponíveis, experimentados pelos alunos da graduação na Disciplina Odontologia Forense, na Faculdade de Odontologia da Universidade de São Paulo (FOUSP), dos cursos integral e noturno, no primeiro semestre de 2016. A tecnologia utilizada foi o software Moodle (\"Modular Object-Oriented Dynamic Learning Environment\"), onde foram depositados os objetos de aprendizagem: apostilas, vídeos, questionários e jogos. Participaram da pesquisa 113 estudantes. Como fonte de dados foram utilizados o grupo-focal, o questionário online semi-estruturado e os relatórios de logs do Moodle. Os dados foram analisados quantitativamente (análise descritiva) e qualitativamente (análise de conteúdo) e os resultados foram triangulados. Os desafios encontrados pelos alunos foram: dificuldade em acessar o AVA pelo celular; sobrecarga da estrutura curricular; não haver cobrança e lembretes para realizar as atividades online; desconexão entre a aula presencial e o ambiente virtual; haver mais de um site utilizado pelas disciplinas da faculdade. Em relação ao material didático, as atividades foram as mais visualizadas, com 1309 visualizações em média, seguida das apostilas (n=230), e dos vídeos (n=122). Os alunos sugeriram que tivesse mais atividades práticas no ambiente virtual. Para eles a realização de atividades no AVA foi importante para a fixação do conteúdo e para identificar eventuais dificuldades na aprendizagem (n=98%). As melhorias propostas, e concretizadas, foram no sentido de superar os desafios citados, ou seja, utilização da versão mobile do Moodle, diminuição da carga horária presencial e notificação de prazos e de atividades via redes sociais e correio eletrônico. Esta pesquisa demonstra a importância de ouvir os alunos durante o processo de ensinoaprendizagem para ajuda-los nas dificuldades encontradas e para que sejam estimulados a buscar o conhecimento. Demonstra também que o uso da tecnologia na educação é uma ferramenta facilitadora da aprendizagem, com alto nível de satisfação dos alunos. / The use of digital information and communication technologies has changed society and its employment has stimulated the debate in the pedagogical area. The incorporation of technologies in education can be considered a facilitating tool for transmitting knowledge to the student. The aim of this case study is to identify the challenges founded and the overcoming proposals presented, and to analyze the satisfaction and usability of the virtual learning environment (VLE) and of the teaching materials available there, in the University of São Paulo, School of Dentistry, of the integral and nocturnal courses, in the first semester of 2016. The technology used was Moodle (Modular Object-Oriented Dynamic Learning Environment), where the learning objects, such as workbooks, videos, questionnaires and games. 113 students participated in the study. The focus group, the online semi-estructured questionnaire, and the Moodle\'s log reports were used as data sources. Data were analyzed quantitatively (descriptive analysis) and qualitatively (content analysis), and the results were triangulated. The challenges encountered by the students were: difficulty in accessing the VLE through the cell phone; overload of the curricular structure; there are no charges and reminders for online activities; disconnection between the classroom and the virtual environment; more than one site used by college subjects. Regarding teaching material, activities were the most visualized, with 1309 views on average, followed by workbook (n = 230), and videos (n = 122). The students suggested that they had more practical activities in the virtual environment. For them, the VLE activities were important for determining the content and for identifying difficulties in learning (n = 98%). The proposed and implemented improvements were aimed at overcoming the aforementioned challenges, namely, the use of the mobile version of Moodle, the reduction of classroom hours and the notification of deadlines and activities via social networks and electronic mail. This research demonstrates the importance of listening to students during the teachinglearning process to help them in the difficulties encountered and to be stimulated to seek knowledge. It also demonstrates that the use of technology in education is a facilitating tool for learning, with a high level of student satisfaction.

Nous décrivons le phénomène d’engagement à travers des expériences transmédia coconstruites avec les bénéficiaires dans le contexte de la formation pour adultes. Nous abordons ce terrain en faisant l’hypothèse qu’un transmédia à valeur expérientielle permet d’accroitre la participation des sujets pour consolider l’engagement en formation. Cette hypothèse ouvre la perspective d’une médiation de type transmédia capable, d’intégrer des objectifs d’exploitation scientifique de l’engagement et de valorisation de la participation et de l’attention qui pourraient être intéressants pour d’autres corpus.À partir d’un cadre d’analyse centré sur les bénéficiaires des transactions, notre enquête met en exergue différentes formes d’engagement suivant des transmédia hybrides aux caractéristiques spécifiques. La complémentarité de ces transmédia a favorisé divers régimes d’engagement observés de façon ponctuelle, pour un engagement sur la durée. / We describe the phenomenon of engagement through co-constructed transmedia experiences with the beneficiaries in the context of adult education. We approach this ground on the assumption that a transmedia with experiential value makes it possible to increase the participation of subjects to consolidate the commitment in training. This hypothesis opens up the prospect of a transmedia type of mediation capable of integrating the objectives of scientific exploitation for the commitment and enhancement of participation and the attention that could be interesting for other corpuses. Based on an analysis framework focused on the beneficiaries of transactions, our survey highlighted different forms of hybrid transmedia engagement with specific characteristics. The complementarity of these transmedia has favoured various commitment regimes observed on an ad hoc basis for a long-term commitment.

Considerato, in generale, l’impatto sempre più massiccio e pervasivo che le tecnologie hanno sulla vita di tutti i giorni e partendo dal presupposto del valore aggiunto derivante dall’impiego delle tecnologie per l’educazione linguistica, in questo lavoro dapprima abbiamo fatto alcune considerazioni in merito a tecnologie e apprendimento/insegnamento linguistico, soffermandoci su Internet e sui media digitali (Capitolo 1), quindi abbiamo selezionato, analizzato e organizzato, in forma di repertorio, diverse risorse online, gratuite, per l’apprendimento/insegnamento del russo (Capitolo 7). L’idea di realizzare un repertorio dei siti Internet e delle risorse è nata dall’intento di creare uno strumento utile, sia ai discenti, sia ai docenti. In particolare, nella prima parte di questo studio abbiamo proposto l’uso di alcune risorse online per presentare l’alfabeto russo (Capitolo 2) e per lo sviluppo della competenza fonologica (Capitolo 3), lessicale (Capitolo 4), morfosintattica (Capitolo 5) e testuale (Capitolo 6). Nella seconda parte, invece, una volta analizzate le caratteristiche di alcune modalità di apprendimento, in presenza, a distanza e in rete (FaD, e-learning, blended learning, didattica 2.0) e delineati i nuovi scenari di apprendimento, tra formale e informale (Capitolo 8), abbiamo realizzato due proposte didattiche, una in ambito universitario (Capitolo 9) e una in ambito scolastico (Capitolo 10), che prevedono sia esperienze di apprendimento collaborativo in rete, sia l’utilizzo di tecnologie e risorse online. / The influence of technologies on everyday life, as it emerges clearly, is increasingly pervasive. Assuming that the use of technologies adds a certain value to language education, in this dissertation we first considered some connections between technologies and learning and teaching languages, in particular dwelling upon Internet and media education (Chapter 1). Then we selected and analysed several websites and free online resources dealing with the Russian language. The result of this work is the inventory of websites and online resources, which we conceived as a useful tool for students and teachers of Russian as a foreign language (Chapter 7). In detail, in the first part of this research work we suggested some online resources to teach absolute beginners the Russian alphabet (Chapter 2) and to develop different competences and skills: phonological (Chapter 3), lexical (Chapter 4), morphological and syntactical (Chapter 5), and textual (Chapter 6). Whereas, in the second part, we dealt with the main characteristics of various types of learning (face-to-face, distance and online learning, blended learning, formal and informal learning etc.) (Chapter 8). In addition we developed two different proposals, the first for University level (Chapter 9), the second conceived for the school classroom (Chapter 10). Our proposals are based on both experiences of collaborative learning and on the use of technologies and online resources.

Cette recherche relève du domaine de la didactique des langues et plus particulièrement de l‘intégration d‘Internet dans l‘enseignement/apprentissage des langues étrangères (désormais L2). Elle se donne pour objectif de consolider l'intake et d‘améliorer l‘acquisition de L2 (ici le français) chez des apprenants de français, langue étrangère, à travers un dispositif hybride. Celui-ci est fondé sur des macro-tâches réalisées à distance et des micro-tâches administrées en présentiel. Ce dispositif s‘appuie également sur l‘exploitation du potentiel d‘Internet pour concevoir des tâches d‘apprentissage et pour créer un centre de ressources virtuel. Il a été conçu pour répondre aux difficultés particulières que rencontrent les apprenants lors de l‘appropriation de L2 et selon leurs besoins langagiers.Cette recherche-action a été menée en Egypte pour des arabophones égyptiens qui apprennent le français comme deuxième langue étrangère (FLE) au Centre Français de Culture et de Coopération (CFCC) au Caire. Elle m‘a conduite à élaborer ce dispositif hybride de tâches afin de vérifier l‘hypothèse générale de ma recherche qui stipule que les tâches d‘apprentissage fondées sur l‘exploitation du potentiel d‘Internet peuvent consolider l‘intake et améliorer l‘acquisition des apprenants de FLE. Ce dispositif m‘a permis de mettre en œuvre des expériences d‘apprentissage potentiellement favorables à l‘acquisition de L2 à travers la réalisation des macro-tâches à distance et des micro-tâches en présentiel. Celles-ci ont été administrées à travers notre centre de ressources en ligne.J‘ai donc conduit une série d‘études expérimentales destinées à évaluer le potentiel acquisitionnel de différentes tâches, réalisées avec des apprenants égyptiens de L2. La réalisation de ces tâches était en autonomie et/ou en collaboration, et sous différentes conditions. Elles avaient pour objectif de dénativiser, a priori, l‘intake des apprenants de L2 afin de les conduire, a posteriori, à un output compréhensible en L2. L‘exploitation d‘Internet m‘a donc permis de présenter aux apprenants un input authentique dans la conception des macro-tâches et de créer un centre de ressources virtuel pour la réalisation des micro-tâches.Grâce à la méthodologie suivie dans cette recherche, j‘ai pu valider mes hypothèses et rendre ces pratiques transférables à d‘autres contextes. Le contenu des tâches semble déterminant par rapport à leur valeur acquisitionnelle. J‘ajoute que les conditions et le contexte dans lesquels les tâches sont réalisées (la défaillance des technologies et du réseau Internet qui s‘imposent parfois sur le terrain) jouent évidemment aussi un grand rôle, et doivent en ce sens recevoir une attention égale dans la recherche en acquisition des L2. / The objective of this research, which lies within the field of language teaching and especially the integration of the Internet in the teaching/learning of foreign languages (Henceforth L2), is to enhance students‘ intake and improve L2 acquisition (French in this case) in French as a foreign language classes through a hybrid environment based on macro-tasks performed in distance and micro-tasks administered in class. This environment also relies on the exploitation of the Internet to design learning tasks and to create a virtual resource center in order to address the specific difficulties that students faced in their learning of the L2. This action research was conducted in Egypt for Egyptian Arabic-language students learning French as a foreign language (FFL) in the French Culture and Cooperation Centre (CFCC) in Cairo. It helped me develop this hybrid task environment to validate the general hypothesis of my research, which states that! learning tasks based on exploiting the Internet can reinforce the intake and improve the acquisition of FFL. This environment allowed me to implement learning experiences that are potentially favorable to the acquisition of L2 through the completion of macro-tasks performed in distance as well as micro-tasks performed in class. These tasks were administered through our virtual resource center. Therefore, Iconducted a series of experimental studies to assess different tasks‘ learnability when performed by Egyptian learners of L2. These tasks were completed independently and/or in collaboration, under various conditions. They were intended to first denativize the intake of L2 learners in order to then help them produce comprehensible output in the L2. The use of the Internet allowed me to present learners with authentic input in the planning and completion of macro-tasks and to create a virtual resource center for the production of micro-tasks. Thanks to the methodology applied in this research, I was able to validate my initial hypotheses and make this environment transferable and adaptable to other contexts as well. The content of the tasks is relative to its learnability. I would finally add that the conditions and context in which these tasks were performed (the failure of technology and Internet network, which may happen quite often in this setting) obviously played a bi! g role in their successful or unsuccessful completion and those factors must be given equal attention in L2 acquisition research.

Compte tenu des propriétés spécifiques de l’Alfa, de son haut potentiel fibreux, des conditions de sa production et de sa transformation très écologiques, nous nous sommes proposés de mener une étude ayant pour objectif l’extraction des fibres cellulosiques à partir de la plante en vue d’applications textiles. L’extraction est conduite suivant différentes voies : mécanique, classique à la soude et enzymatique. A la lumière des différentes caractéristiques de ces fibres issues des différents procédés d’extraction, nous avons établi des corrélations entre la structure et les propriétés des fibres cellulosiques obtenues. Les fibres 1, 2 et 3 issues de différentes extractions ont fait l’objet d’une étude comparative dans le but d’évaluer au mieux, d’une part, leurs caractéristiques physico-chimiques (finesse et longueur, densité, MEB, FTIR-ATR, diffraction aux rayons X, comportement au mouillage et énergie de surface, taux de reprise, cinétique d’absorption-désorption…) et leurs propriétés mécaniques, d’autre part. L’efficacité de chaque traitement a été approuvée par l’élimination progressive des composants non cellulosiques et l’obtention de fibres longues prêtes à être intégrées dans le processus de transformation textile. Dans un second temps, nous avons produit des fils par le procédé conventionnel anneau- curseur afin d’obtenir une structure organisée et homogène. Ainsi, le potentiel textile des fibres d’Alfa a été confirmé. Afin de valoriser les fibres très courtes, nous les avons mises en solution dans un solvant écologique : le NMMO. La solution concentrée est extrudée à travers une filière selon le procédé de filage humide appliqué aux fibres Lyocell. Finalement, une comparaison entre les fibres extraites des tiges d’Alfa, les filaments obtenus par coagulation et les autres fibres naturelles couramment utilisées dans l’industrie textile, a été effectuée tout au long de cette étude pour permettre de bien situer les fibres d’Alfa dans le paysage général des fibres textiles. / Given the specific properties of Alfa plant, its high fibrous potential, its conditions of production and its processing very ecological, we proposed to study the extraction of cellulosic fibers for textile applications. The extraction is carried out following different ways: mechanical, chemical and enzymatic. In light of the different characteristics of these fibers obtained from different extraction methods, we established correlations between the structure and properties of cellulosic fibers 1, 2 and 3 fibers, resulting from the different extraction ways have been compared in order to better assess: on the one hand, their physico-chemical characteristics (fineness and length, density, SEM, FTIR-ATR, X-ray diffraction, wetting behavior and surface energy, moisture regain, absorption-desorption kinetics ...) and mechanical properties, on the other hand. The efficiency of each treatment was approved by the phasing out of non-cellulosic components and the obtaining of long fibers ready to be integrated into the process of textile processing. In a second step, we produced yarns by the conventional ring spinning method, in order to get an organized and consistent structure. Thus, the textile potential of Alfa fibers has been confirmed. Wastes from spinning (very short fibers) were dissolved in an ecological solvent: NMMO. The concentrated solution was extruded through a spinneret according to the wet spinning process applied to the Lyocell fibers. Finally, a comparison between the fibers extracted from Alfa stems, filaments obtained by coagulation and other natural fibers commonly used in the textile industry was conducted throughout this study to properly situate Alfa fibers in the general landscape of textile fibers.