Afin d'étudier les variations temporelles du signal acoustique dans un lac de cratère nous avons réalisé une station de mesure permanente et l'avons installée en novembre 1994 dans le lac de cratère du volcan Taal (philippines). Cette station acquiert tous les quarts d'heure des échantillons temporels du signal acoustique (à 40 mètres de profondeur) dans trois bandes de fréquences différentes: BF(<500hz), MF (<12,5 kHz) et HF(<500kHz). Le traitement des données permet la représentation d'un sonogramme. Une variation importante du signal acoustique a été induite par le séisme de Mindoro (magnitude 7. 1 ) du 15 Novembre 1994 situé à 46 km du Taal. La puissance thermique apportée au lac chute brutalement de 50%, le débit gazeux est ralenti de 1/10° . Les flux liquide et gazeux ne reviennent à leur état initial que 5 jours après. On assiste à un phénomène transitoire qui touche tous les paramètres mesurés : déformations, acoustique, thermique. A partir des données de la température du lac de cratère du Taal et des valeurs météorologiques, un calcul de l'apport énergétique de l'édifice volcanique au lac de cratère de 1990 à 1995 permet de mettre en évidence la reprise d'activité du volcan Taal depuis 1990, la puissance thermique mesurée passant de 50MW à 250MW. Le flux gazeux mesuré ne suffisant pas pour apporter une telle puissance, que ce soit au TaaI ou au Ruapehu, nous concluons que la chaleur est apportée majoritairement par des échanges liquides. Nous montrons par ailleurs que les variations de l'inclinaison du volcan sont fortement corrélées avec les variations de la puissance thermique. La mesure du signal acoustique en milieu volcanique est donc une méthode prometteuse qui mérite d'être mise en oeuvre dans d'autres édifices volcaniques.

Educationists, linguists and other stakeholders are concerned about the effectivity of the level of teaching regarding Afrikaans Additional Language. Some of the teachers of Afrikaans Additional Language are not qualified in the teaching of specifically a foreign language. There is a lot of uncertainty concerning the difference between the teaching of a home language and additional language teaching. In order to ensure learners improvement and achievement as well as future use of Afrikaans Additional Language it is necessary that the teaching of additional languages, especially Afrikaans must be given appropriate attention. The purpose if this study was to determine the selection the teachers made regarding teaching and learning approaches, methods and teaching materials, including the curriculum, textbooks and other documents, as well as to establish the perceptions of the learners regarding these approaches, methods and materials in the teaching of Afrikaans Additional Language in the Dr. Kenneth Kaunda District through empirical research, and to undertake a literature study to establish a teaching-learning program framework that can facilitate to the effective implementation of the National Curriculum and Assessment Policy Statement in all the language skills of Afrikaans Additional Language. An interpretive research paradigm was used as foundation for this study. A literature study was undertaken to establish what such a framework should look like with specific attention to language skills. Qualitative research was undertaken through using multiple case studies where teachers and learners who were willing to take part were questioned and observed regarding the teaching of Afrikaans Additional Language as well as the problems they experienced. Documents such as teaching materials and the curriculum were analysed as well. The analyses had a two-pronged focus: thematic analysis with the use of the computer software program, NVivo 8, where the data was reduced and thereafter analysed manually by the researcher. The researcher then used a comparative analysis to compare the different case studies (schools). The results of this study showed that the implementation of the curriculum was problematic for teachers, they were uncertain about the degree of difficulty of the teaching materials, and would rather stick to textbooks. The results also indicated that the teachers who did not use the communicative approach preferred to teach mainly through direct instruction. The communication in the classrooms was mainly teacher-orientated and the learners got little chance to use the language in interactive activities. The proposed teaching-learning programme framework for Afrikaans Additional Language should help teachers with the planning of their teaching as well as the implementation of the curriculum that could result in more effective Additional Language Teaching to learners. / Thesis (Ph.D. (Teaching and Learning))--North-West University, Potchefstroom Campus, 2012

Teacher self-efficacy beliefs (TSE) are an important attribute of effective teachers. Teacher efficacy refers to a teacher‘s belief in his or her abilities to bring about valued outcomes of engagement and learning among learners, including difficult or unmotivated learners. English Second Language (ESL) reading seems to be a substantial problem in Namibia. This research aimed to explore rural Namibian grade 4-6 teachers‘ self-efficacy beliefs regarding the teaching of ESL reading. The research was based on Bandura (1997)‘s well-known four sources of self-efficacy, and the Linnenbrink and Pintrich (2003) engagements to focus on aspects which influence teachers‘ TSE with regard to teaching reading. The researcher formed assumptions from the epistemological premises and followed an interpretive approach. A non-probability sampling method was used to select the eight teachers within the four schools of the nearby circuit. The data were collected qualitatively by means of in-depth interviews in order to gather data from teachers‘ individual experiences about intermediate learners‘ low reading skills and teaching reading. Data were analysed and interpreted using Atlas.ti ™. The purpose of this research was to identify issues regarding rural Namibian teachers‘ self-efficacy beliefs that relate to teaching English Second Language (ESL) reading. The rationale for this study was to identify gaps related to teachers‘ SEBs and to make suggestions to improve teachers SEB‘s. The researcher identified a fifth source, the school environment, as another source that influences teachers‘ SEBs regarding teaching reading. Since the school environment is an additional source of self-efficacy the researcher recommend further research that can establish evidence on how school environment influences SEBs with regard to reading achievements. / MEd (Curriculum Development), North-West University, Potchefstroom Campus, 2014

Metacognition is commonly understood in the context of the learners and not their teachers. Extant literature focusing on how Mathematics teachers apply their metacognitive skills in the classroom, clearly distinguishes between teaching with metacognition (TwM) referring to teachers thinking about their own thinking and teaching for metacognition (TfM) which refers to teachers creating opportunities for learners to reflect on their thinking. However, in both of these cases, thinking requires a language, in particular appropriate mathematical language to communicate the thinking by both teacher and learners in the Mathematics classroom. In this qualitative study, which forms part of a bigger project within SANPAD (South Africa Netherlands Research Programme on Alternatives in Development), the metacognitive skills and mathematical language used by Mathematics teachers who teach at two township schools were interrogated using the design-based research approach with lesson study. Data collection instruments included individual interviews and a trigonometric assessment task. Lessons were also observed and video-taped to be viewed and discussed during focus group discussions in which the teachers, together with five Mathematics lecturers, participated. The merging of the design-based research approach with lesson study brought about teacher-lecturer collaboration, referred to in this study as the Mathematics Educators’ Reflective Inquiry (ME’RI) group, and enabled the design of a hypothetical teaching and learning trajectory (HTLT) for the teaching of trigonometric functions. A metacognitive performance profile for the two grade 10 teachers was also developed. The Framework for Analysing Mathematics Teaching for the Advancement of Metacognition (FAMTAM) from Ader (2013) and the Teacher Metacognitive Framework (TMF) from Artzt and Armour-Thomas (2002) were adjusted and merged to develop a new framework, the Metacognitive Teaching for Metacognition Framework (MTMF) to analyse the metacognitive skills used by mathematics teachers TwM as well as TfM. Without oversimplifying the magnitude of these concepts, the findings suggest a simple mathematical equation: metacognitive skills + enhanced mathematical language = conceptualization skills. The findings also suggest that both TwM and TfM are required for effective mathematics instruction. Lastly the findings suggest that the ME’RI group holds promise to enhance the use of the metacognitive skills and mathematical language of Mathematics teachers in Mathematics classrooms. / PhD (Mathematics Education), North-West University, Potchefstroom Campus, 2014

This dissertation is a historical biography of F.V. Engelenburg (1863-1938) and covers the period from 1889 to 1938, when Engelenburg lived and worked in South Africa. The study situates Engelenburg in the historical landscape of the Zuid-Afrikaansche Republiek during the late nineteenth and early twentieth century. The focus is mainly on Engelenburg’s journalistic career at De Volksstem, but attention is also given to his many other interests, including the development and promotion of Afrikaans and the Afrikaans academic culture, especially in the northern parts of South Africa. His work pertaining to the development of architecture, literature, aviation, the visual and performing arts, history, libraries, museums and educational institutions comes under the spotlight. His private life is considered as well in order to portray his versatility as a person. The chapters have been subdivided to highlight the variety of matters he was involved in, and a chronological approach has been followed as is customary in a biography. The study is based on archival research. In particular, Engelenburg’s private collections were used, as well as the private collections of some of his contemporaries. Engelenburg assumes a central place in the biography, with special focus on how he perceived and experienced conditions and everyday life in South Africa from the point of view of his transnational European background. His role as influential opinion-maker and political commentator on local and international politics is highlighted. His ties with political leaders and his involvement in government affairs are emphasised. The study also refers to his continued contact with his motherland, the Netherlands, and with the Dutch language. After the Anglo- Boer War, he realised that the languages of the future in South Africa would be Afrikaans (not Dutch), alongside English. His continuing support for Afrikaans as a language of instruction in schools and universities and the development of the Afrikaans literature, as well as his support for the standardization of Afrikaans helped to establish Afrikaans as an official language alongside English and Dutch in South Africa. Engelenburg’s active contribution to the work of the Zuid-Afrikaanse Akademie voor Taal, Lettere en Kuns (now the Suid- Afrikaanse Akademie vir Wetenskap en Kuns), helped to put the organization on a sound footing for future development. The Akademie can be seen as a living monument to his work in South Africa. / PhD (History)--North-West University, Vaal Triangle Campus, 2015.

Teacher self-efficacy beliefs (TSE) are an important attribute of effective teachers. Teacher efficacy refers to a teacher‘s belief in his or her abilities to bring about valued outcomes of engagement and learning among learners, including difficult or unmotivated learners. English Second Language (ESL) reading seems to be a substantial problem in Namibia. This research aimed to explore rural Namibian grade 4-6 teachers‘ self-efficacy beliefs regarding the teaching of ESL reading. The research was based on Bandura (1997)‘s well-known four sources of self-efficacy, and the Linnenbrink and Pintrich (2003) engagements to focus on aspects which influence teachers‘ TSE with regard to teaching reading. The researcher formed assumptions from the epistemological premises and followed an interpretive approach. A non-probability sampling method was used to select the eight teachers within the four schools of the nearby circuit. The data were collected qualitatively by means of in-depth interviews in order to gather data from teachers‘ individual experiences about intermediate learners‘ low reading skills and teaching reading. Data were analysed and interpreted using Atlas.ti ™. The purpose of this research was to identify issues regarding rural Namibian teachers‘ self-efficacy beliefs that relate to teaching English Second Language (ESL) reading. The rationale for this study was to identify gaps related to teachers‘ SEBs and to make suggestions to improve teachers SEB‘s. The researcher identified a fifth source, the school environment, as another source that influences teachers‘ SEBs regarding teaching reading. Since the school environment is an additional source of self-efficacy the researcher recommend further research that can establish evidence on how school environment influences SEBs with regard to reading achievements. / MEd (Curriculum Development), North-West University, Potchefstroom Campus, 2014

Metacognition is commonly understood in the context of the learners and not their teachers. Extant literature focusing on how Mathematics teachers apply their metacognitive skills in the classroom, clearly distinguishes between teaching with metacognition (TwM) referring to teachers thinking about their own thinking and teaching for metacognition (TfM) which refers to teachers creating opportunities for learners to reflect on their thinking. However, in both of these cases, thinking requires a language, in particular appropriate mathematical language to communicate the thinking by both teacher and learners in the Mathematics classroom. In this qualitative study, which forms part of a bigger project within SANPAD (South Africa Netherlands Research Programme on Alternatives in Development), the metacognitive skills and mathematical language used by Mathematics teachers who teach at two township schools were interrogated using the design-based research approach with lesson study. Data collection instruments included individual interviews and a trigonometric assessment task. Lessons were also observed and video-taped to be viewed and discussed during focus group discussions in which the teachers, together with five Mathematics lecturers, participated. The merging of the design-based research approach with lesson study brought about teacher-lecturer collaboration, referred to in this study as the Mathematics Educators’ Reflective Inquiry (ME’RI) group, and enabled the design of a hypothetical teaching and learning trajectory (HTLT) for the teaching of trigonometric functions. A metacognitive performance profile for the two grade 10 teachers was also developed. The Framework for Analysing Mathematics Teaching for the Advancement of Metacognition (FAMTAM) from Ader (2013) and the Teacher Metacognitive Framework (TMF) from Artzt and Armour-Thomas (2002) were adjusted and merged to develop a new framework, the Metacognitive Teaching for Metacognition Framework (MTMF) to analyse the metacognitive skills used by mathematics teachers TwM as well as TfM. Without oversimplifying the magnitude of these concepts, the findings suggest a simple mathematical equation: metacognitive skills + enhanced mathematical language = conceptualization skills. The findings also suggest that both TwM and TfM are required for effective mathematics instruction. Lastly the findings suggest that the ME’RI group holds promise to enhance the use of the metacognitive skills and mathematical language of Mathematics teachers in Mathematics classrooms. / PhD (Mathematics Education), North-West University, Potchefstroom Campus, 2014

This dissertation is a historical biography of F.V. Engelenburg (1863-1938) and covers the period from 1889 to 1938, when Engelenburg lived and worked in South Africa. The study situates Engelenburg in the historical landscape of the Zuid-Afrikaansche Republiek during the late nineteenth and early twentieth century. The focus is mainly on Engelenburg’s journalistic career at De Volksstem, but attention is also given to his many other interests, including the development and promotion of Afrikaans and the Afrikaans academic culture, especially in the northern parts of South Africa. His work pertaining to the development of architecture, literature, aviation, the visual and performing arts, history, libraries, museums and educational institutions comes under the spotlight. His private life is considered as well in order to portray his versatility as a person. The chapters have been subdivided to highlight the variety of matters he was involved in, and a chronological approach has been followed as is customary in a biography. The study is based on archival research. In particular, Engelenburg’s private collections were used, as well as the private collections of some of his contemporaries. Engelenburg assumes a central place in the biography, with special focus on how he perceived and experienced conditions and everyday life in South Africa from the point of view of his transnational European background. His role as influential opinion-maker and political commentator on local and international politics is highlighted. His ties with political leaders and his involvement in government affairs are emphasised. The study also refers to his continued contact with his motherland, the Netherlands, and with the Dutch language. After the Anglo- Boer War, he realised that the languages of the future in South Africa would be Afrikaans (not Dutch), alongside English. His continuing support for Afrikaans as a language of instruction in schools and universities and the development of the Afrikaans literature, as well as his support for the standardization of Afrikaans helped to establish Afrikaans as an official language alongside English and Dutch in South Africa. Engelenburg’s active contribution to the work of the Zuid-Afrikaanse Akademie voor Taal, Lettere en Kuns (now the Suid- Afrikaanse Akademie vir Wetenskap en Kuns), helped to put the organization on a sound footing for future development. The Akademie can be seen as a living monument to his work in South Africa. / PhD (History)--North-West University, Vaal Triangle Campus, 2015.

This dissertation is a report on how Tom Lanoye, a contemporary Flemish author who explores themes of social relevance, deconstructs the sexual identity of his characters within the context of a postmodernist culture. The manifestation of this deconstruction process is described within those theoretical paradigms of Michel Foucault and Judith Butler that link sexual identity and social mores. For the purpose of this research Tom Lanoye‘s ‘Monster’ Trilogy was selected. Set against the backdrop of Belgium society during the late nineties of the twentieth century and highlighting the moral downfall of the Deschryver patriarchy, Lanoye’s novels address an assortment of contemporary gender and social political issues in his trilogy. These include the following: political corruption; incest; homosexuality; racism; the sexual abuse of minors; the relation between language and identity, volatile childrenparent relationships; the subversion of gender norms and sexual transformation. / In hierdie verhandeling word verslag gedoen van die wyse waarop Tom Lanoye as hedendaagse eksponent van die Vlaamse versetprosa die seksuele identiteit van sy karakters binne die konteks van 'n postmodernistiese verwysingsraam dekonstrueer. Die manifestasie van hierdie dekonstruksieproses word beskryf binne die teoretiese paradigmas met betrekking tot die verband tussen seksuele identiteit en maatskappy van Michel Foucault en Judith Butler. Vir die doel van hierdie ondersoek is Lanoye se 'Monstertrilogie' geselekteer. Gesitueer teen die agtergrond van die Belgiese maatskappy in die laat negentigerjare van die twintigste eeu en gefokus op die morele ondergang van die Deschryver-patriargie, sny Lanoye se trilogie 'n verskeidenheid van aktuele gender-en sosio-politieke kwessies aan. Hierdie kwessies sluit in: politieke korrupsie; bloedskande; homoseksualiteit, rassisme; die seksuele misbruik van minderjariges; die verhouding tussen taal en identiteit; onbestendige ouer-kind-verhoudings; die ondermyning van gendernorme en die kwessie van seksuele transformasie. / Afrikaans & Theory of Literature / M.A. (Afrikaans)

Summaries in Afrikaans and English / Text in Afrikaans / Two opposing approaches to beginning reading are used, namely the phonological and global approach, under which the whole word, whole sentence and whole language methods are classed. The whole crux of the controversy is situated in beginning reading as an explicit, intensive and systematic method of teaching phonics, as opposed to implicit beginning reading through discrimination of global configurations, augmented by psycholinguistic guesses within reading context. Arguments about the advantages and disadvantages of the opposing methods have been hurdled to and fro for decades without any discernible gain. The question emerged whether research on brain physiology with respect to language and reading, a relatively new field of study, could shed light on the foundation of an accountable method for beginning reading. Renewed insights to the controversial differences were gained, and brain physiologically accountable parameters as a base for a beginning reading method were framed from these insights. / Twee opponerende aanvangsleesbenaderings word in die skole gebruik, naamlik die fonologiese benadering en die geheelbenadering, waaronder die geheelwoord-, geheelsinen die geheeltaalmetode ressorteer. Die kern van die verskil tussen die aanvangsleesbenaderings le in aanvangslees as eksplisiete, intensiewe en sistematiese foneemonderrig, teenoor implisiete aanvangslees wat die waarneming van globale konfigurasies, aangevul deur psigolinguistiese raaiskote binne die leeskonteks, aanmoedig. In die polemiek om die beste leesmetode word argumente oor die voor- en nadele ten opsigte van die begronding van hierdie opponerende metodes reeds dekades heen en weer geslinger. Navorsingsresultate word eindeloos, sonder duidelike winste, met mekaar vergelyk. Dit het die vraag laat onstaan of navorsing ten opsigte van die breinfisiologie met betrekking tot taal en lees, 'n relatief nuwe studieveld, moontlik lig sou kon werp op die begronding van 'n verantwoordbare aanvangsleesmetode. Die literatuurstudie ten opsigte van breinfisiologie het vernuwende insigte oor die polemiese begrondingsverskille na vore gebring, en breinfisiologies-verantwoordbare parameters as basis vir 'n aanvangsleesmetode is uit hierdie insigte opgestel. / Psychology of Education / M. Ed. (Psychology of Education)