<p> The Archean "Loose Pebble Bay" conglomerate, Manitou Lake, northwestern Ontario, contains a variety of clast types, not all of which can be readily ascribed to local lithologies. This study was undertaken to determine the modal clast composition of the conglomerate, and investigate the origin of the clasts. The conglomerate lies near the top of a stratigraphic sequence which includes mafic and felsic volcanic rocks, iron formations, conglomerates, sandstones and argillites. The conglomerate unit itself consists of interbedded conglomerate and sandstone, and probably represents a channel-fill deposit of an ancient submarine fan.</p> <p> Modal percentages of clast types were obtained using a line-intercept method. They indicate that most of the debris in the conglomerate can be reasonably attributed to uplift and erosion of the lateral equivalents of the underlying stratigraphy, except for the granitoid clasts, which have no known origin within the area.</p> <p> Petrographic examinations of the clasts indicate that field identifications must be confirmed with thin section investigations.</p> <p> The modal composition of granitoid clasts was determined utilizing both thin sections and stained slabs. Most of the granitoid clasts are granodiorite, or lie just within the granite field, adjacent to the granodiorite field. Textural studies of the granitoid clasts suggest that gneissic and allotriomorphic-granular textured rocks may have formed by deformation or partial recrystallization along grain boundaries of previously hypidiomorphic-granular rocks. Textures generally indicate intrusive origin and slow cooling, although two granophyric samples may have solidified at relatively shallower depths than the other granitoid rocks.</p> <p> The textures and compositions of most of the granitoid clasts suggest that they were derived from one intrusive body. Intrusion of such a body into the volcanic-sedimentary belt, followed by uplift and erosion, would account for the presence in the "Loose Pebble Bay" conglomerate of granitic clasts and clasts similar to the underlying rocks. However, no evidence of such an intrusion has been found in the Manitou Lake area, and two of the granitoid clasts are noticeably different in composition from the others. The possibility of a pre-existing sialic basement cannot be ruled out.</p> / Thesis / Bachelor of Science (BSc)

No description available.

No description available.

Thesis (M. Sc. (Geology)) -- University of Limpopo, 2020 / The Glentig, Alma and Swaershoek Formations were deposited after the emplacement of the Bushveld igneous complex (BIC). The sediments accumulated in what is termed as the proto-basin of the Waterberg Group. The Glentig Formation is an unconformity bounded formation that is overlain by the Swaershoek and Alma Formations of the Waterberg Group. This study revisited the stratigraphy and put perception on the petrography, lithofacies, provenance, paleoweathering, tectonic setting and source rock characteristics of the lower parts of Waterberg Group (Swaershoek and Alma Formations) and Glentig Formation. The methodologies employed in achieving the aforementioned goals include stratigraphical analysis, petrographical and modal composition analyses, lithofacies analysis and geochemical analysis. In the study area (northeast of Modimolle town), the Glentig Formation lies or bounded between the Swaershoek Formation and Schrikkloof Formation of the Rooiberg Group. The Glentig, Swaershoek and Alma Formations attained a maximum thickness of about 400 m, 300 m and 190 m, respectively. Based on the stratigraphical analysis, the Swaershoek, Alma and Glentig Formations can be correlated. The basis for the correlation rests solemnly on the similarities in the lithological characteristics that can be found in the three formations. Six facies were identified based on lithofacies analysis. The lithofacies are grouped into 2 facies association (FA1 and FA2). The two facies associations are FA1: Conglomerate and massive sandstone, and FA2: Cross-bedded sandstone, and planar cross-bedded sandstone. Sedimentological characteristics of the identified facies associations are interpreted as debris flow, and longitudinal and transverse bars (fluvial channel deposits). Petrography and modal composition analyses indicate that the detrital components of the sandstones are dominated by monocrystalline quartz, vi feldspar and lithic fragments. The sandstones of the Swaershoek, Alma and Glentig Formations can be classified as subarkosic arenite and lithic arkosic arenite. Also, provenance analysis indicates that the sandstones are derived from both felsic igneous provenance and intermediate igneous provenance. The modal composition analysis and geochemical tectonic setting discrimination diagrams show that the sediments are from both the passive and active continental margin tectonic settings. Also, the geochemical data of major and trace elements suggested that the studied formations have been derived from the same provenance source area. The indices of weathering indicated that the studied rocks have been subjected to moderate to the high degree of chemical weathering. / Mining Qualification Authority (MQA)

Les membres de la communauté inuite de Kugluktuk au Nunavut souhaitent remédier à la détérioration des routes d'accès en VTT menant au Parc Territorial Kugluk. Les problèmes rencontrés concernent l'approfondissement des sillons des polygones à coins de glace sous le passage des VTT, la formation de mares boueuses et l'érosion de parties de la piste par le recul de parois de glissements de terrain rétrogressifs. Devant l'urgence d'agir, les autorités locales, en collaboration avec le département des Parcs et Endroits spéciaux du Gouvernement du Nunavut, ont fait la conception de deux infrastructures saisonnières, à savoir une route d'été sous la forme d'un remblai mince (50 cm) reliant le réseau routier du village jusqu'à l'entrée du Parc Territorial Kugluk et, à l'intérieur du parc, une route sur plateforme de bois, surélevée d'une trentaine de centimètres au-dessus du sol. Cette étude collaborative vise à caractériser et à identifier la variabilité des conditions de pergélisol le long de ces corridors routiers afin de guider les travaux de construction et de suggérer des méthodes de mitigation de la dégradation du pergélisol adaptées aux conditions et aux infrastructures locales. Une méthodologie multi technique a permis la cartographie à haute résolution des dépôts de surface et des conditions de pergélisol par la récolte avec un drone d'images aériennes à haute résolution, des levés de géoradar, des forages géotechniques, des analyses de laboratoires et des analyses géothermiques de données de câbles à thermistances et, finalement, la simulation numérique des températures du pergélisol pour la période s'échelonnant de 2020 à 2100. Les résultats indiquent la présence d'une vaste zone de pergélisol sensible le long de la route d'été; en plus, les deux routes traverseront en tout environ 379 sillons de coins de glace. L'analyse historique du climat local révèle que le réchauffement du climat s'est déjà manifesté par une hausse de 2°C de la température moyenne annuelle de l'air depuis 1950. Une méthode de mitigation innovante a été suggérée afin de réduire la vitesse de dégradation de coins de glace sous la route d'accès. Les résultats des simulations géothermiques indiquent que les infrastructures légères envisagées contribueront à préserver le pergélisol et les coins de glace dans le futur. / The members of the Inuit community of Kugluktuk in Nunavut wish to make corrections to the damages affecting the ATV trails leading to the Kugluk Territorial Park. The dominant problems are the deepening of ice wedge furrows at trail crossovers, formation of mud puddles and erosion of parts of the trail along head scarps of retrogressive landslides. Given the urgent need for action, local authorities and the Government of Nunavut's Parks and Special Places (NP&SP) department designed two types of seasonal infrastructure: 1- a summer road on a thin (50 cm) embankment from the village road network to the park entrance and, 2- a boardwalk trail laid about 30 cm high above the tundra surface inside the park area. This collaborative research project aims to characterize the permafrost conditions along the new road corridor in support of construction works and to suggest locally adapted mitigation approaches to prevent the degradation of permafrost. The applied multi-technique research methodology includes high resolution mapping of surficial geology and permafrost conditions, acquisition of high-resolution aerial photographs with a drone, making of a digital elevation model, ground penetrating radar surveys, geotechnical coring, geotechnical laboratory analyses, thermal analysis with on-site data from ground temperature monitoring stations and, finally, numerical simulations of permafrost temperatures for the period 2020-2100. Results indicate the presence of a wide zone of thaw sensitive permafrost along a part of the summer road; in addition, the two road types together will cross over about 379 ice-wedge furrows. Historical regional climate analysis reveals that global warming already provoked an increase of 2°C of the mean annual air temperature since 1950. A new mitigation technique intended for reducing ice wedge degradation under the summer gravel road has been suggested and discussed with the community. According to geothermal model results, the new infrastructures shall preserve the permafrost and the ice wedges from thawing in the future.

L’objectif de cette thèse est de réfléchir aux enjeux d’une histoire du jeu de stratégie en temps réel (STR). Il s’agit de mieux comprendre les contextes dans lesquels le genre prend sens pour historiciser son émergence et sa période classique. Cette thèse cherche à documenter, d’une part, la cristallisation du STR en tant qu’objet ayant une forme relativement stable et en tant que corpus précis et identifié et, d’autre part, l’émergence des formes de jouabilité classiques des STR. La première partie est consacrée à décrire l’objet de cette recherche, pour mieux comprendre la complexité du terme « stratégie » et de la catégorisation « jeu de stratégie ». La seconde partie met en place la réflexion épistémologique en montrant comment on peut tenir compte de la jouabilité dans un travail historien. Elle définit le concept de paradigme de jouabilité en tant que formation discursive pour regrouper différents énoncés actionnels en une unité logique qui n’est pas nécessairement l’équivalent du genre. La troisième partie cartographie l’émergence du genre entre les wargames des années 1970 et les jeux en multijoueur de la décennie suivante. Deux paradigmes de jouabilité se distinguent pour former le STR classique : le paradigme de décryptage et le paradigme de prévision. La quatrième partie explique et contextualise le STR classique en montrant qu’il comporte ces deux paradigmes de jouabilité dans deux modes de jeu qui offrent des expériences fondamentalement différentes l’une de l’autre. / This thesis is a reflection on the stakes of a history of the real-time strategy (RTS) genre. The goal is to understand contexts in which RTS makes sense to historicize its emergence and its classical period. It seeks to document, on the one hand, the crystallization of RTS as an object having a relatively stable form and as a precise and identified corpus and, on the other hand, the emergence of classical RTS gameplay figures. The first part of this thesis describes the object of this research in order to understand the complexity of the words “strategy” and “strategy games.” The second part puts in place the epistemological thinking by showing how gameplay can be taken into account in a history of video games. It defines the gameplay paradigm concept as a discursive formation to regroup actional statements as a logical unit that is not necessarily equivalent to a genre. The third part maps the emergence of the genre from wargames in the 1970s to multiplayer games of the following decade. Two gameplay paradigms are distinguished and will form the classical RTS: the paradigm of decryption and the paradigm of prediction. The last part explains the role of classical RTS by showing how these two paradigms coexist as two different game modes that offer fundamentally different gameplay experiences.

L’étude des formations de fer rubané (BIF) permet de comprendre les conditions des océans de et de l’atmosphère terrestres au cours de l’Archéen et du début du Protérozoïque. L’objectif de cette thèse est de fournir une analyse minéralogique et géochimique détaillée de BIFs de deux localités distinctes, séparées par la frontière Archéen-Protérozoïque. Une attention particulière est portée à la minéralogie de leurs carbonates et oxydes de fer. Les BIFs de 2,7 Ga de la formation Manjeri, Zimbabwe et de 2,4 Ga du Groupe Itabira, Brésil, ont dans les deux cas été précipités par mélange de fluides hydrothermaux marins oxygénés. Ceci est démontré par la présence d’inclusions de nano-hématite dans les lames de chert (Itabira et Manjeri) et de dolomite (Itabira seulement), qui sont interprétées comme la phase minérale la plus ancienne dans les échantillons. En outre, la microscopie électronique à transmission à faisceau d’ions focalisé (FIB-TEM) révèle la présence de plaquettes de nano ferrihydrite dans les BIF dolomitiques (carbonate d’itabirite). La dolomite est interprétée comme étant une phase primaire précipitée à des températures plus élevées (~100°C) de fluides hydrothermaux riches en CO2. Des anomalies positives en Eu dans les deux formations indiquent une composante hydrothermale, susceptible d’être la source du fer réduit. Les changements de faciès dans les deux unités sont le résultat de transgression/régression; et des évènements hydrothermaux post dépôt masquent les conditions primaires. Les carbonates riches en fer dans les deux faciès ont différentes origines: diagénétiques (Itabira) et hydrothermales post dépôt (Manjeri). Toutefois, les carbonates riches en fer des deux formations ont des valeurs négatives de ∂13C, ce qui indique qu’au moins une partie du carbone dans les carbonates est d’origine organique.Des analyses en balance de Curie dans le carbonate d’itabirite révèlent que la maghémite est le produit de transformation de la ferrihydrite lorsque de la dolomite se décompose à ~790°C. La maghémite a une température de Curie comprise entre 320 et 350°C et est stable jusqu’à une température de 925°C. Les analyses en FIB-TEM sur le processus de martitisation ont révélé deux mécanismes possibles à partir de deux échantillons de martite provenant respectivement du Brésil et d’Inde. En fonction de la cause de la martitisation, que nous avons déterminé être soit la déformation soit l’hydrothermalisme, la martitisation se produit respectivement par l’intermédiaire de:1. La réorganisation de défauts ponctuels, pour former des jumeaux. Ces défauts sont causés par les vacances dans la structure spinelle de la maghémite, dues à la suppression des ions Fe3+ en excès au cours de l’oxydation de la magnétite. C’est dans ce jumelage que le mécanisme de martitisation se produit.2. La migration des joints de grains par l’hématite au détriment de la magnétite, qui est due à la présence de fluide le long des interfaces du cristal. La maghémite se forme en raison de l’excès de Fe3+ produit pendant la martitisation de la magnétite, qui se déplace vers la surface des cristaux de magnétite. / It is the study of banded iron formations (BIFs) that provides understanding into the conditions of the Earth’s oceans and atmosphere during the Archean and Early Proterozoic. The aim of this thesis is to provide a detailed mineralogical and geochemical understand of BIFs from two separate localities separated by the Archean Proterozoic boundary. Close attention is paid to their carbonate and iron oxide mineralogy.The BIFs of the 2.7 Ga Manjeri Formation, Zimbabwe and 2.4 Ga Itabira Group, Brazil were both precipitated from oxygenated mixed marine-hydrothermal fluids. This is demonstrated by the presence of nano-hematite inclusions in the chert (Itabira and Manjeri) and dolomite (Itabira only) laminae, which is interpreted as the oldest mineral phase within the samples. Additionally, focused ion beam transmission electron microscopy (FIB-TEM) reveals the presence of nano ferrihydrite platelets within the dolomitic BIFs (carbonate itabirite). The dolomite is interpreted to be a primary phase precipitated at higher temperatures (~100°C) from CO2-rich hydrothermal fluids. Positive Eu anomalies in both formations indicate a hydrothermal component, likely to be the source of the reduced iron. Facies changes in both units are the result of transgression/regression and post depositional hydrothermal events mask primary conditions. Iron-rich carbonates in both facies have different origins; diagenetic (Itabira) and post depositional hydrothermal (Manjeri). However, the iron-rich carbonates of both formations have negative ∂13C values, indicating that at least part of the carbon in the carbonates is of organic origin. Curie Balance analyses into the carbonate itabirite reveals that maghemite is the transformation product of the ferrihydrite when dolomite decomposes at ~790°C. The maghemite has a Curie temperature between 320 and 350°C and is stable up to temperatures of 925°C.FIB-TEM investigations into the martitisation process revealed two possible mechanisms from two martite samples, from Brazil and India. Depending of the cause of the martitisation, here found to be deformation and hydrothermalism, the martitisation occurs respectively via either: 1. Ordering of point defects caused by vacancies in the spinel structure of maghemite, due to the removal of excess Fe3+ ions during the oxidation of magnetite, to form twins. It is in this twinning that the martitisation mechanism occurs.2. Grain boundary migration by hematite at the expense of magnetite is due to the presence of fluid along the crystal interfaces, where maghemite forms due to excess Fe3+ produced during martitisation of the magnetite, moving towards the surface of the magnetite crystals.

Esta investigação buscou depreender o momento em que o professor torna-se notícia no jornalismo brasileiro, com o objetivo de analisar, a partir do fato noticioso qual é imagem construída do professor da educação básica, uma vez que prevalece no jornalismo um modo de ler e escrever que ignora a presença do inconsciente nos sujeitos da escrita. Para cumpri-lo, reunimos como corpus matérias jornalísticas, incluindo notícias e artigos, publicadas entre janeiro de 2009 e janeiro de 2010 no jornal Folha de São Paulo e também notícias publicadas, entre 2006 e 2011, em veículos de informação variados. Pensando na insistência do jornalismo profissional em se apresentar como porta-voz da realidade e de como, para nós, tal insistência decorre de um deslize ideológico próprio de uma concepção de linguagem que ignora o sujeito do inconsciente, analisamos os textos a partir do conceito de Ideologia (HERBERT, 1995), que depois foi reelaborado no quadro da Análise do Discurso por Michel Pêcheux (2010). Ao deparar-nos com a complexidade do material analisado, buscamos referências teóricas para sustentar nossa análise em diferentes campos do saber, além daquele da Análise do discurso. Portanto, considerou-se neste trabalho a contribuição da Análise Crítica do Discurso, da Sociologia da Comunicação e da Psicanálise, de orientação Lacaniana. Para recuperar o diálogo que se dá no processo de constituição da imagem do professor no discurso da mídia, primeiramente identificamos, quantificamos e qualificamos as fontes de informações que foram utilizadas com maior frequência na composição do texto jornalístico, de modo a observar a prevalência do discurso dos especialistas do campo da educação. Assim, partindo dessa materialidade, recuperamos as imagens do professor construídas no discurso jornalístico e a relação dessas imagens com os modos de ler e escrever no jornalismo que constituem também imagens sobre o próprio jornalismo. A análise levou-nos a identificar uma prática jornalística que tenta apagar a presença do inconsciente na escrita e acaba por reduzir as possibilidades de reflexão, resultando em homogeneização da imagem do professor. Mostramos que se há de fato no jornalismo uma pretensão de tomar a realidade como expressão não dialetizável de suas crenças, essa é reforçada na identificação do discurso dos especialistas em educação. Nossa pesquisa observou um processo de identificação que marca a relação do jornalista com o especialista consultado. Tal processo permite ao primeiro legitimar sua fala pelo traço com o qual se identifica ao outro, limitando a pluralidade e colaborando para que o discurso jornalístico engendre-se em um discurso reacionário e moralizante. Concluímos que a leitura e a escrita no ensino de jornalismo deve cada vez mais enfocar a insustentabilidade teórica da objetividade e possibilitar novos modos de contextualizar a cobertura em educação. Em nossa avaliação, se o momento atual é de perda das referências cristalizadas a respeito do que é ser um professor, também poderá ser um momento extremamente criativo para encontrarmos novas formas de apresentação do sujeito professor no âmbito da imprensa e, consequentemente, pode ser um momento muito criativo para o jornalismo. / This investigation has aimed to understand the moment in which the teacher becomes news in the Brazilian journalism. Its objective is to analyze, from the news event the image of school teacher that is constructed, once it is prevailed in journalism a way of reading and writing that ignores the presence of the unconscious within the writing characters. In order to do so, there was a compilation of a corpus of printed news, including news and articles, published between January 2009 and January 2010 at Folha de São Paulo. Different sources of news, published between 2006 and 2011, were also collected. Considering the fact that professional journalism insists in presenting itself as a spokesperson of the reality, we state, that this insistence is a result of ideological slip proper of a conception of language that ignores the subject of the unconscious, the texts were analyzed based on the concept of Ideology ( HERBERT, 1995), later elaborated in Discourse Analysis by Michale Pêcheux (2010). As faced the complexity of the analyzed material, theoretical references were sought in order to sustain our analysis in different areas, besides Discourse Analysis. Therefore, in this investigation not only was Critical Discourse Analysis considered but also Communications Sociology and Lacanian Psychoanalysis were taken into consideration. In order to look into the dialogue that takes place in the process of constitution of the teachers image in the media, firstly we identified, quantified and qualified the sources of information that were mostly used in the composition of the journalistic text, so that we could observe the prevalence of the discourse of the specialists on the education field. Thus, based on this materiality, we gathered the images of the teacher built in the journalistic discourse and the relationship of these images with the ways of reading and writing in the journalism that build its own image. By the analysis, we have identified a journalistic praxis that tries to eliminate the unconsciouss presence in writing. That ends reducing the possibilities of reflection and resulting in the homogenization of the teacher\'s image. We have shown that if there is in journalism an intention of taking the reality as unspoken expression of its beliefs, this is reinforced by the identification in education specialists discourse. Our investigation observed a process of identification that designates the relationship between the journalist and the consulted specialist. Such process allows the first one to legitimate his speech by the feature which he identifies itself with the other, limiting its various facets and contributing to the creation of a reactionary and also moralizing discourse. We concluded that the reading and writing within the teaching of journalism should focus ever more on the theoretical unsustainability of objectivity and therefore it should make it possible new ways of contextualizing the cover of the education area. We consider that the current moment represents a loss of strong references of what it is to be a teacher. It can also be an extremely creative moment in order to find new ways of introducing the teacher character within the press and, consequently, it can be an very creative moment for the journalism itself.

Esta investigação buscou depreender o momento em que o professor torna-se notícia no jornalismo brasileiro, com o objetivo de analisar, a partir do fato noticioso qual é imagem construída do professor da educação básica, uma vez que prevalece no jornalismo um modo de ler e escrever que ignora a presença do inconsciente nos sujeitos da escrita. Para cumpri-lo, reunimos como corpus matérias jornalísticas, incluindo notícias e artigos, publicadas entre janeiro de 2009 e janeiro de 2010 no jornal Folha de São Paulo e também notícias publicadas, entre 2006 e 2011, em veículos de informação variados. Pensando na insistência do jornalismo profissional em se apresentar como porta-voz da realidade e de como, para nós, tal insistência decorre de um deslize ideológico próprio de uma concepção de linguagem que ignora o sujeito do inconsciente, analisamos os textos a partir do conceito de Ideologia (HERBERT, 1995), que depois foi reelaborado no quadro da Análise do Discurso por Michel Pêcheux (2010). Ao deparar-nos com a complexidade do material analisado, buscamos referências teóricas para sustentar nossa análise em diferentes campos do saber, além daquele da Análise do discurso. Portanto, considerou-se neste trabalho a contribuição da Análise Crítica do Discurso, da Sociologia da Comunicação e da Psicanálise, de orientação Lacaniana. Para recuperar o diálogo que se dá no processo de constituição da imagem do professor no discurso da mídia, primeiramente identificamos, quantificamos e qualificamos as fontes de informações que foram utilizadas com maior frequência na composição do texto jornalístico, de modo a observar a prevalência do discurso dos especialistas do campo da educação. Assim, partindo dessa materialidade, recuperamos as imagens do professor construídas no discurso jornalístico e a relação dessas imagens com os modos de ler e escrever no jornalismo que constituem também imagens sobre o próprio jornalismo. A análise levou-nos a identificar uma prática jornalística que tenta apagar a presença do inconsciente na escrita e acaba por reduzir as possibilidades de reflexão, resultando em homogeneização da imagem do professor. Mostramos que se há de fato no jornalismo uma pretensão de tomar a realidade como expressão não dialetizável de suas crenças, essa é reforçada na identificação do discurso dos especialistas em educação. Nossa pesquisa observou um processo de identificação que marca a relação do jornalista com o especialista consultado. Tal processo permite ao primeiro legitimar sua fala pelo traço com o qual se identifica ao outro, limitando a pluralidade e colaborando para que o discurso jornalístico engendre-se em um discurso reacionário e moralizante. Concluímos que a leitura e a escrita no ensino de jornalismo deve cada vez mais enfocar a insustentabilidade teórica da objetividade e possibilitar novos modos de contextualizar a cobertura em educação. Em nossa avaliação, se o momento atual é de perda das referências cristalizadas a respeito do que é ser um professor, também poderá ser um momento extremamente criativo para encontrarmos novas formas de apresentação do sujeito professor no âmbito da imprensa e, consequentemente, pode ser um momento muito criativo para o jornalismo. / This investigation has aimed to understand the moment in which the teacher becomes news in the Brazilian journalism. Its objective is to analyze, from the news event the image of school teacher that is constructed, once it is prevailed in journalism a way of reading and writing that ignores the presence of the unconscious within the writing characters. In order to do so, there was a compilation of a corpus of printed news, including news and articles, published between January 2009 and January 2010 at Folha de São Paulo. Different sources of news, published between 2006 and 2011, were also collected. Considering the fact that professional journalism insists in presenting itself as a spokesperson of the reality, we state, that this insistence is a result of ideological slip proper of a conception of language that ignores the subject of the unconscious, the texts were analyzed based on the concept of Ideology ( HERBERT, 1995), later elaborated in Discourse Analysis by Michale Pêcheux (2010). As faced the complexity of the analyzed material, theoretical references were sought in order to sustain our analysis in different areas, besides Discourse Analysis. Therefore, in this investigation not only was Critical Discourse Analysis considered but also Communications Sociology and Lacanian Psychoanalysis were taken into consideration. In order to look into the dialogue that takes place in the process of constitution of the teachers image in the media, firstly we identified, quantified and qualified the sources of information that were mostly used in the composition of the journalistic text, so that we could observe the prevalence of the discourse of the specialists on the education field. Thus, based on this materiality, we gathered the images of the teacher built in the journalistic discourse and the relationship of these images with the ways of reading and writing in the journalism that build its own image. By the analysis, we have identified a journalistic praxis that tries to eliminate the unconsciouss presence in writing. That ends reducing the possibilities of reflection and resulting in the homogenization of the teacher\'s image. We have shown that if there is in journalism an intention of taking the reality as unspoken expression of its beliefs, this is reinforced by the identification in education specialists discourse. Our investigation observed a process of identification that designates the relationship between the journalist and the consulted specialist. Such process allows the first one to legitimate his speech by the feature which he identifies itself with the other, limiting its various facets and contributing to the creation of a reactionary and also moralizing discourse. We concluded that the reading and writing within the teaching of journalism should focus ever more on the theoretical unsustainability of objectivity and therefore it should make it possible new ways of contextualizing the cover of the education area. We consider that the current moment represents a loss of strong references of what it is to be a teacher. It can also be an extremely creative moment in order to find new ways of introducing the teacher character within the press and, consequently, it can be an very creative moment for the journalism itself.

Dans le contexte actuel d’évolution et de transformation du travail, notre recherche s’attache à comprendre et à expliquer de quelle manière des acteurs professionnels (individuels et collectifs), engagés dans la définition des politiques et des pratiques de formations professionnelles aéronautiques, parviennent, collectivement, à se mettre d’accord sur des normes et des contenus de programmes de formation. Cette recherche compare des activités de délibérations collectives de deux groupes professionnels (l’un à dimension nationale et l’autre à dimension locale) qui ont en charge la définition de nouveaux programmes et normes de formations techniques qualifiantes. Les membres de ces groupes (27 et 20 sujets) représentent des entreprises, des formateurs, responsables de lycées techniques, des Ministères compétents, des figures individuelles reconnues du secteur aéronautique au plan national. Au niveau méthodologique, dans une approche exploratoire compréhensive, nous avons observé et enregistré systématiquement les réunions de ces deux groupes durant une année. Nous avons aussi analysé les discours qui en découlent ainsi qu’effectué et examiné des entretiens semi-directifs et des questionnaires que nous avons construits. Dans une perspective systémique, active et plurielle de la socialisation, le modèle de l’interstructuration du sujet et des institutions (Baubion-Broye & Hajjar, 1998) auquel nous nous référons considère que les activités du sujet sont construites et signifiées par lui, tout au long de sa vie, et en interaction avec autrui. Nos résultats montrent, notamment, que les décideurs prennent majoritairement des décisions collectives par « consensus apparent » et qu’il y a un lien entre l’expression manifeste d’alliances et le degré de consensus. Les relations interpersonnelles évoluent au cours du temps. / In the current context of evolution and transformation of work, our research attempts to understand and explain how professional actors (individual and collective), engaged in the definition of policies and practices of aeronautic vocational trainings, come to an agreement, collectively, on standards and contents of training programs. This research confronts processes of collective deliberations of two professional groups (one of national size and the other of local size) which have to define new programs and norms concerning qualifying technical trainings. Members of these groups (27 and 20 subjects) represent companies, trainers or managers of technical schools (private or public), competent ministries, individual figures recognized in the aeronautic field. At a methodological level, in a comprehensive exploratory approach, we have systematically observed and analyzed meetings of these two groups during one year as well as the speeches that come out from meetings. We made and analyzed semi-structured interviews and questionnaires we had built. In a systemic, active and plural approach of socialization, the interstructuration model of subject and institutions we refer to (Baubion-Broye & Haijar, 1998), considers that subject builds his activities all along his life and in interaction with other people. Our results show, on one hand that, generally, decision-makers arrive on a conclusion and a decision thanks to “apparent consensus”. On the other hand our study proves there is a link between the evident expression of coalitions and the consensus degree. Interpersonal relations change over time.