Dissertations / Theses on the topic 'Nature conservation – history – 20th century'

An investigation of architecturally significant buildings constructed within the last fifty years, in the Midwest and the application of preservation theories to these significant buildings, to aid in evaluation strategies and preservation implementation.Recognition of recent past construction as candidates for architecturally significant cultural resources and the application of preservation theories to these buildings make for good design and preservation practice. Part of our responsibility, as preservation professionals is to promote the preservation of significant structures, regardless of the date of construction. Since there is no established process to aid in preserving recently constructed buildings of architectural significance, it is necessary to develop strategies to assist in the evaluation process.
Department of Architecture

This is a historic structure report for the C-47 Nike missile launch site in Wheeler, Indiana. This report provides a description, condition assessment, and recommendation for restoration of the site since it has sustained damage from weather, fire, and vandals. The site is listed on the State Register and National Register of Historic Places and the Nike Preservation Group desires to turn the site into a Cold War museum and memorial.A history of the Cold War and development of the Nike missile systems and C-47 site provides the background of the project. Each structure and feature is described and the condition recorded. Recommendations for treatment and maintenance are provided. Suggestions are made for a phased restoration of the site to accommodate a Cold War museum. Since it is recommended the site be open to the public, issues regarding public health, safety, security, and handicap accessibility are addressed. This project does not provide a full management and preservation plan, measured HABS/HAER drawings, or a structural analysis.
Department of Architecture

'Aspects of Modern Scottish Literature and Ecological Thought' argues that the science and philosophy of 'ecology' has had a profound impact on Scottish literature since the mid-nineteenth century to the present day, and relates the work of successive generations of Scottish writers to concurrent developments in ecological thought and the environmental sciences. Chapter One suggests that, while Romantic ways of thinking about the natural world remained influential in nineteenth-century culture, new environmental theories provided fresh ways of perceiving the world, evident from the writings of Scottish mountaineers. Chapter Two explores the confrontation of modernity and wilderness in the fiction and travel writings of Robert Louis Stevenson, and some contemporaries such as John Muir. Chapter Three suggests that ecologically-sensitive local and global concerns, rather than 'national' ones per se, are central to the work of Hugh MacDiarmid, Lewis Grassic Gibbon and others, while Chapter Four demonstrates that post-war 'rural' writers including Nan Shepherd, Neil Gunn, Edwin Muir and George Mackay Brown, often viewed as peripheral, are actually central and of international relevance, and challenges the assumption that there is a fundamental divide between Scottish rural and urban writing. Finally, Chapter Five argues that contemporary writers John Burnside, Kathleen Jamie and Alan Warner are not only reviewing human relationships with nature, but also the role writing has to play in exploring and strengthening that relationship, helping to determine the ecological 'value' of poetry and fiction. By looking at Scottish literature through the lens of ecological thought, and engaging with international discourses of 'Ecocriticism', this thesis provides a fresh perspective in contrast to the dominant critical views of modern Scottish literature, and demonstrates that Scottish writing constitutes a heritage of ecological thought which, in this age of environmental awareness, should be recognised as not only relevant, but vital.

This thesis seeks to investigate the ecological theme in German-Swiss prose of the last thirty years. The role of nature has understandably always been significant in Swiss literature. In a nation that has eked out its living, in such an impressive and violent landscape, there is of necessity a highly developed awareness of the environment. Furthermore, the close relationship between mankind and the environment is inherently ambiguous, with each acting alternately as curse and blessing to the other. The bond between people and geography is made all the more vital in the Alps, where existence is under the constant threat of avalanches and landslides. In light of this heightened environmental sensibility, it is unsurprising that, with the growing profile of ecological debate in general, Swiss writers should demonstrate an acute cognisance of the significance of ecological problems. The notion of an ecological voice takes the discussion further. The question is posed whether these works merely represent a reflection of societal concern for the environment, or whether literary responses may constitute solutions. This investigation therefore contributes both to literary criticism on Swiss writing and to the understanding of the role of conceptualisation in finding solutions to ecological problems. To explore and analyse these ideas, this thesis considers a representatively broad spectrum of differing responses to ecological crisis. It is not intended to be an exhaustive list of recent Swiss ‘Öko-Literatur', but instead to be an investigation of the variety of narrative strategies employed in this period of growing ecological awareness.

Novel The Fellow What is knowledge? Who should own it? Why is it used? Who can use it? Is knowledge power, or is it an illusion? These are some of the questions addressed in The Fellow. At the time of Australian federation, the year 1901, while a nation is being drawn into unity, one of its primary educational institutions is being drawn into disunity when an outsider challenges the secure world of The University of Melbourne. Arriving in Melbourne after spending much of his life travelling around Australia, an old Jack-of-all-trades bushman finds his way into the inner sanctum of The University of Melbourne. Not only a man of considerable and varied skill, he is also a man who is widely read and self-educated. However, he applies his knowledge in practical ways, based on what he has experienced in the

This thesis considers a selection of modern landscape poetry from an ecocritical perspective, arguing that this poetry demonstrates how the term landscape might be re-imagined in relation to contemporary environmental concerns. Each chapter discusses poetic responses to a different kind of landscape: gardens, forests, rivers and islands. Chapter One explores how, in the poetry of Ian Hamilton Finlay, Douglas Dunn, Louise Glück and David Harsent, gardens are culturally constructed landscapes in which ideas of self, society and environment are contemplated; I ask whether gardening provides a positive example of how people might interact with the natural world. My second chapter demonstrates that for Sorley MacLean, W.S. Merwin, Susan Stewart and Kathleen Jamie, forests are sites of memory and sustainable ‘dwelling', but that deforestation threatens both the ecology and the culture of these landscapes. Chapter Three compares river poems by Ted Hughes and Alice Oswald, considering their differing approaches to river sources, mystical immersion in nature, water pollution and poetic experimentation; I discuss how in W.S. Graham's poetry the sea provides a complex image of the phenomenal world similar to Oswald's river. The final chapter examines the extent to which islands in poetry are pastoral landscapes and environmental utopias, looking in particular at poems by Dunn, Robin Robertson, Iain Crichton Smith and Jen Hadfield. I reflect upon the potential for island poetry to embrace narratives of globalisation as well as localism, and situate the work of George Mackay Brown and Robert Alan Jamieson within this context. I engage with a range of ecocritical positions in my readings of these poets and argue that the linguistic creativity, formal inventiveness and self-reflexivity of poetry constitute a distinctive contribution to contemporary understandings of landscape and the environment.

This is a study of the creation and evolution of state forestry within colonial Kenya in social, economic, and political terms. Spanning Kenya’s entire colonial period, it offers a chronological account of how forestry came to Kenya and grew to the extent of controlling almost two million hectares of land in the country, approximately 20 per cent of the most fertile and most populated upland (above 1,500 metres) region of central Kenya . The position of forestry within a colonial state apparatus that paradoxically sought to both ‘protect’ Africans from modernisation while exploiting them to establish Kenya as a ‘white man’s country’ is underexplored in the country’s historiography. This thesis therefore clarifies this role through an examination of the relationship between the Forest Department and its African workers, Kenya’s white settlers, and the colonial government. In essence, how each of these was engaged in a pursuit for their own idealised ‘good forest’. Kenya was the site of a strong conservationist argument for the establishment of forestry that typecast the country’s indigenous population as rapidly destroying the forests. This argument was bolstered against critics of the financial extravagance of forestry by the need to maintain and develop the forests of Kenya for the express purpose of supporting the Uganda railway. It was this argument that led the colony’s Forest Department along a path through the contradictions of colonial rule. The European settlers of Kenya are shown as being more than just a mere thorn in the side of the Forest Department, as their political power represented a very real threat to the department’s hegemony over the forests. Moreover, Kenya’s Forest Department deeply mistrusted private enterprise and constantly sought to control and limit the unsustainable exploitation of the forests. The department was seriously underfunded and understaffed until the second colonial occupation of the 1950s, a situation that resulted in a general ad hoc approach to forest policy. The department espoused the rhetoric of sustainable exploitation, but had no way of knowing whether the felling it authorised was actually sustainable, which was reflected in the underdevelopment of the sawmilling industry in Kenya. The agroforestry system, shamba, (previously unexplored in Kenya’s colonial historiography) is shown as being at the heart of forestry in Kenya and extremely significant as perhaps the most successful deployment of agroforestry by the British in colonial Africa. Shamba provided numerous opportunities to farm and receive education to landless Kikuyu in the colony, but also displayed very strong paternalistic aspects of control, with consequential African protest, as the Forest Department sought to create for itself a loyal and permanent forest workforce. Shamba was the keystone of forestry development in the 1950s, and its expansion cemented the position of forestry in Kenya as a top-down, state-centric agent of economic and social development.

While the role of photography in enforcing hegemonic ideologies has been amply studied, this thesis addresses the under-researched topic of how photography undermined dominant narratives in specific historical circumstances. I argue that, in the later part of the long nineteenth century, photographs were used to represent the natural world in contexts where their functions were uncertain and their capacities not clearly defined, and that these hesitations allowed for the expression of resistances to dominant social attitudes towards nature. I analyse how these divergences were articulated through three independent case studies, each addressing a corpus of photographs which has been marginalised in scholarly discourse. The case studies all concern photographs of vegetation. The first one discusses photographs produced around Fontainebleau during the Second French Empire, commonly understood as auxiliary materials for Barbizon painters, and argues that they were in fact autonomous representations, reflecting marginal modes of experiencing nature which resisted its prevailing construction as spectacle. The second case study examines a photographic series depicting Amazonian vegetation, published between 1900 and 1906, and shows how, in attempting to satisfy conflicting ideological demands, these photographs undermined the hierarchies enforced upon the natural world by colonial science. The third case study analyses photographs from an early twentieth-century environmentalist treatise, and demonstrates how, while the author's discourse seemingly complied with conventional attitudes towards nature, the photographs instituted an ethical stance opposed to early conservation's aesthetic focus and anthropocentrism. Throughout the case studies, I argue that the photographs were consubstantial to the emergence of these resistances; that dissenting representations stemmed from a tension between their producers' lived experience and the ideological frameworks which informed each context; and that this process engendered remarkable formal innovations, which are not usually associated to non-artistic images. I contend that radical renewals of visual expression occur in all representational contexts, as image producers adapt their tools or forge new ones according to circumstances, and that more attention must be paid to such visual innovations outside the field of artistic production.

Includes bibliographical references (leaves 313-325) Specific concern is the poetic, as well as literal, significance given to the environment, and in particular to land, as a measure of belonging in Australia. Environment is explored in the context of ecologies, offered here as an alternative configuration of the nation, and in which the subject, through human and non-human environmental relations, can be culturally and spatially positioned. Argues that both environment and ecology are narrowly defined in dominant discourses that pursue an ideal, certain and authentic belonging for non-indigenous Australians.

De 1914 à 1964, la conservation des monuments historiques d'Alsace est progressivement soumise à la législation et à la pratique administrative françaises. Cependant, les institutions introduites dans le Reichsland d'Alsace-Lorraine avant 1914 sont maintenues en vigueur après 1918 et certaines d'entre-elles sont même étendues aux départements " de l'Intérieur ". Après la centralisation des services d'Alsace et Lorraine en 1925, les monuments historique d'Alsace sont soumis à la même pénurie budgétaire que ceux des autres départements français. Le maintien en Alsace du régime des cultes concordataires permet toutefois aux édifices cultuels protégés au titre des monuments historiques de bénéficier de l'apport du budget des Cultes. En outre, les départements du Bas-Rhin et du Haut-Rhin prennent le relai de l'ancien Land d'Alsace-Lorraine pour subvenir à l'entretien des monuments historiques. La conservation des monuments historiques d'Alsace constitue un véritable enjeu national : le nombre d'édifices protégés ne cesse d'augmenter, les souvenirs et vestiges des deux guerres mondiales et les monuments d'architecture française sont particulièrement mis en valeur, alors que les monuments qui avaient été restaurés par des architectes allemands avant 1914 sont souvent " dérestaurés ". Le champ des protections s'élargit progressivement aux sites pittoresques, aux abords des monuments et aux centres anciens. Enfin, la connaissance du patrimoine alsacien progresse grâce à la réalisation de nouveaux inventaires.

In the framework of the conservation of early reinforced concrete structures from the last third of the 19th century up to 1914, this research deals with superstructures (excluding foundations, roads, pipes, etc.) in reinforced concrete (in the modern sense of the term – i.e. concrete made with artificial cement and rebars supplying tensile strength; thus, the combination of a metal profile embedded in concrete is excluded). The development of reinforced concrete as a building material started around 1880 and became widespread around the time of the First World War. Some of the structures concerned are listed as heritage properties today. Therefore they deserve specific and careful study to ensure long-term preservation of their historic, architectural, technical and socio-economic value. They bear witness to a period in construction history when reinforced concrete was a new material. The outbreak of the First World War marked the end of the initial period of innovation, exploration and experimentation. By then, reinforced concrete had become widely accepted and adopted as a suitable and effective building material. However, present-day attempts at restoration often prove inadequate, due to incomplete understanding of this period of construction and the characteristics of the first generation of reinforced concrete. If the causes of degradation are incorrectly diagnosed, the repairs are likely to be inappropriate. Moreover, the number of reinforced concrete structures requiring repair work is currently increasing with the natural ageing of the material. This phenomenon will continue to grow in the coming years.

With this in mind, the present research aims at identifying the specific structural characteristics of reinforced concrete structures erected before the First World War. Several axes of investigation were pursued in this PhD research and have resulted in the main observations detailed below.

- Based on a case study of the region of Brussels (Belgium), a database of structures built in reinforced concrete prior to 1914 was drawn up in order to place the material in its historical and geographical context. The inventory currently contains 507 examples and provides a panorama of the uses of reinforced concrete, ranging from numerous foundations and slabs to a complete structure from the end of the 1890s. This list is supplemented by a survey of a total of 605 patents filed for reinforced concrete in Belgium before the First World War. The early development of reinforced concrete was strongly related to national patenting, with a considerable number of systems being patented by private inventors for commercial purposes. Reinforced concrete profoundly transformed the building industry. All the professions working with the composite material had to change their approach, from the planning stage through to execution on the site. From the viewpoint of construction history, all these modifications make the time of the advent of reinforced concrete a particularly fruitful period to study.

- From the survey of early reinforced concrete structures in Brussels and the database of Belgian patents, the supremacy of the Frenchman François Hennebique and his system on the Brussels market for reinforced concrete (and, by extension, on the Belgian market) before 1914 is incontestable. This commercial achievement resulted from a combination of factors: an efficient structural system, meticulous attention to the quality of on-site reinforced concrete execution, and the commercial acumen to develop the business through advertising and other media. The well-known Hennebique system represents a monolithic structure including slabs, beams and columns. In fact, this system changed over the decades of operation of Hennebique’s company, not so much in relation to the design methods (his original semi-empirical method continued to be used) but particularly in practical terms (the type and location of the rebars among others). The evolution of the system is analysed by means of technical drawings from about 30 Belgian projects designed by Hennebique between 1900 and 1930.

- After the building contractors, who had been the first to believe in the structural and economic potential of reinforced concrete, engineers invented the calculation models and architects started developing new shapes. The Belgian engineer Paul Christophe was among the first theorists of reinforced concrete. The publication of his book Le béton armé et ses applications in 1899 is internationally recognised as a milestone in the rational modelling of structural reinforced concrete elements. Prior to the present study, details of his life and work remained largely uninvestigated, but the discovery of large parts of his personal archives has allowed clarification of his role in the popularisation of reinforced concrete, especially at the theoretical level.

- Reinforced concrete structures around the beginning of the 20th century were initially governed by empirical models of calculation (and execution) developed by the individual constructors. Gradually, reinforced concrete standards, published between 1904 and 1923 and based on working stress analysis and elastic modular ratio theory, replaced the utility of the patented systems. The different theoretical approaches are briefly described in this research. Mastering the theoretical assumptions and calculation methods used at the time represents the first step towards an appreciation of the structural behaviour and the possible weaknesses that can be expected.

- A review, based on literature published at that time, of the properties of the components of reinforced concrete allows identification of the characteristic materials used in the concrete matrix and the metal reinforcements. The execution process and the available technological tools for erecting a reinforced concrete structure are also addressed, as these would have had a direct influence on the quality of construction. Non-destructive and destructive experimental laboratory tests were performed on original samples, mainly removed from the Colo-Hugues viaduct (1904, Braine-l’Alleud, Hennebique system) in order to assess the mechanical properties, chemical features and durability issues for concrete and ferrous reinforcements. Comparing the results obtained using different techniques also makes it possible to determine the extent to which these techniques are reliable for the appraisal of early reinforced concrete structures.

- The structural efficiency of the Hennebique system is assessed based on an understanding of the principles of Hennebique’s semi-empirical method of calculation, but also – and primarily – by means of observations from experimental tests carried out on full-sized beams removed from the Colo-Hugues viaduct. Analysing and understanding the behaviour of the new composite material was a critical issue for promoting the use of reinforced concrete at the beginning of the 20th century. Today, what is required is a re-assessment of its structural behaviour. Three bending tests up to failure in simply supported conditions were performed at the BATir Department of the Université libre de Bruxelles on T-beams from the Colo-Hugues viaduct. This case study is representative of the majority of Hennebique structures, because the typical continuous straight T-beam is the main structural element of any Hennebique structure (bridge, building, etc.). The first test is a four-point bending test on a complete span (6 m) of the viaduct to obtain the response of the central part under positive bending moment. The flexural failure was ductile and occurred through yielding of the reinforcements followed by crushing of the concrete at mid-span. The second and third tests are three-point bending tests on 4 m long specimens centred on the column, representing the behaviour of the beam around the supports. These showed a sudden slipping failure due to loss of the adhesive bond between rebars. The results of these three experiments combined reproduce the actual behaviour of the viaduct in service. The bearing capacity of the Hennebique system in service and at ultimate has been demonstrated, at least for one loading case. These experimental tests provide essential data for a better understanding of the mechanisms of failure and reveal the main weaknesses of the Hennebique T-beam. Two strengthening solutions are suggested as supplementary information.

- The pathologies observed in early reinforced concrete structures (honeycombs, corrosion of the rebars, and so on) are mainly attributable to the tools and techniques that the builders had at their disposal (handmade compaction, high water-to-cement ratio, etc.) and by the limited contemporary knowledge of the physical and chemical phenomena, especially with regard to long-term effects. In fact, the concrete quality of the viaduct is surprisingly satisfactory despite its great age, due to the fact that the whole structure was covered with plaster, like the majority of reinforced concrete structures designed at that time.

This research establishes that reinforced concrete structures from 1880 to 1914 differ from later reinforced concrete structures. Taking into consideration the features of early reinforced concrete structures will contribute to ensuring sustainable conservation with limited intervention, thus preserving as much as possible of the original structure when restoration work is undertaken. Working on existing buildings often requires a multidisciplinary and holistic approach. The present study could thus be extended in various areas. For example, other structural aspects could be studied more in depth, such as demonstration of the shear strength of the Hennebique system or detailed consideration of the reinforcements (low adherence, particular anchorage devices, etc.)/

C'est dans le cadre de la conservation, au sens large du terme, que s'inscrit cette recherche sur les constructions en béton armé de première génération, c'est-à-dire de la fin du 19ème siècle au début du 20ème siècle. Cette recherche traite uniquement des superstructures, à l'exclusion des fondations, routes, tuyaux, etc. et en béton armé au sens moderne du terme, c'est-à-dire un béton réalisé à base de ciment artificiel et dont les armatures interviennent surtout pour reprendre les efforts de traction, ce qui exclut par exemple les utilisations de poutrelles métalliques enrobées de béton. Certains de ces ouvrages, réalisés entre 1880 et 1914, font aujourd'hui partie intégrante du patrimoine bâti, pour leurs valeurs architecturale, historique, technique ou aussi socio-économique. Ils jalonnent désormais l'histoire de la construction comme témoins d'une époque où le béton armé était un matériau nouveau. La Première Guerre mondiale marque la fin de cette période de premières innovations, d'explorations et d'expérimentations. Elle entérine l'acceptation et la diffusion du béton armé comme matériau de construction à part entière. Cependant, ainsi que le montrent certains projets de restauration actuels aux interventions inadéquates, il y a encore une méconnaissance des spécificités du béton armé de cette époque. Les causes de leurs dégradations mal diagnostiquées sont traitées de façon inappropriée. Or, dans les prochaines années, nombre de structures en béton armé construites dans la première moitié du 20ème siècle seront amenées à subir une rénovation suite au vieillissement naturel du matériau. C'est pourquoi pour conserver au mieux ces structures, il est indispensable d'étudier en détails leurs caractéristiques techniques pour ensuite intervenir, si nécessaire, de façon précise et adaptée.

Ce doctorat s'attèle donc à identifier les particularités des constructions en béton armé construites avant l'avènement de la Première Guerre mondiale, et plus spécifiquement à étudier leurs aspects structuraux. Plusieurs axes de recherche ont été développés et ont abouti aux principaux résultats suivants.

- Basé sur le cas de la région de Bruxelles-Capitale (Belgique), un inventaire des interventions en béton armé, construites avant 1914, a été dressé pour replacer le matériau dans son contexte historique et géographique. Cette base de données, comprenant 507 biens jusqu'à présent, illustre les types d'utilisation du béton armé dans la construction au début du 20ème siècle, d'abord des fondations ou simples planchers, jusqu'à une structure monolithique complète dès la fin des années 1890. Cet inventaire est complété par le relevé détaillé des brevets, au nombre de 605, déposés à ce sujet en Belgique avant la Première Guerre mondiale. Les brevets ont joué un rôle fondamental dans le développement du béton armé. Celui-ci était, en effet, régi par un foisonnement de systèmes commerciaux, majoritairement brevetés. L'introduction du béton armé a transformé en profondeur le secteur de la construction et notamment les professions liées tant à la phase de conception qu'au chantier lui-même. Du point de vue de l'histoire de la construction, toutes ces mutations font de l'avènement du béton armé une période historique riche.

- A la lecture du panorama offert par les inventaires des constructions et des brevets, la prééminence de la compagnie du Français François Hennebique, et donc de son système, sur le marché bruxellois (et par extrapolation sur le marché belge) du béton armé avant 1914 est indéniable. La réussite commerciale de Hennebique résulte d'une combinaison de facteurs: un système efficace sur le plan structural, une qualité d'exécution de béton coulé en place fiable et méticuleuse ainsi qu'un sens développé des affaires, en maîtrisant l'art de la promotion et de la publicité notamment. Le système bien connu de Hennebique comprend un ensemble monolithique formé par des dalles (hourdis), poutres et colonnes. Ce système a, en réalité, évolué dans le temps, pas tant d'un point de vue théorique (les calculs de dimensionnement sont les mêmes) mais plutôt pratique (positionnement, type d'armatures, etc.). Cette évolution a été observée par l'étude d'une trentaine de cas pratiques exécutés par Hennebique entre 1900 et 1930 en Belgique.

- Après les entrepreneurs, qui ont été les premiers à croire aux nouvelles possibilités constructives qu'offre le béton armé ainsi qu'à son succès commercial, les ingénieurs en inventent les principes de calcul et les architectes en révolutionnent les formes. L'ingénieur belge Paul Christophe fut parmi les premiers théoriciens du béton armé. La publication de son ouvrage Le béton armé et ses applications en 1899 constitue une étape importante, et internationalement reconnue, pour le dimensionnement rationnel d'éléments structuraux en béton armé. Jusqu'à la présente recherche, sa vie et son œuvre étaient restées assez confidentielles mais la découverte d'une partie de ses archives personnelles a permis de clarifier son rôle dans la diffusion, surtout théorique, du béton armé.

- Les structures en béton armé d'avant la Première Guerre mondiale furent d'abord gouvernées par des méthodes empiriques de dimensionnement (et d'exécution) développées par chaque constructeur. L'apparition des premières règlementations entre 1904 et 1923, basées sur une analyse en contraintes admissibles et la théorie du coefficient d'équivalence, remplace ensuite peu-à-peu l'utilité des systèmes brevetés. Les différentes approches théoriques sont brièvement décrites dans cette recherche. Maitriser les hypothèses et les méthodes de calculs employées à l'époque est, en effet, une première étape pour comprendre le fonctionnement structural prévu et les potentielles défaillances de dimensionnement.

- A travers une lecture attentive de la littérature publiée à cette période, les matériaux intervenants dans la fabrication du béton armé (c'est-à-dire le béton et les armatures) et utilisés couramment au début du 20ème siècle ont été identifiés ainsi que les moyens disponibles à cette époque pour produire des structures en béton armé. Des méthodes d'essais non-destructives et destructives ont été appliquées principalement, sur le viaduc Colo-Hugues (1904, Braine-l'Alleud, système Hennebique) afin d'évaluer les caractéristiques mécaniques, les propriétés chimiques et la durabilité tant du béton que des renforcements métalliques. Comparer les résultats de ces différentes méthodes permet d'aborder les limites d'utilisation de ces techniques, lorsqu'il s'agit d'évaluer structuralement des bétons armés de première génération.

- Grâce à la compréhension des principes, semi-empiriques, de dimensionnement appliqués par le bureau Hennebique en son temps mais surtout grâce aux observations déduites des essais expérimentaux réalisés sur des poutres de grandeur réelle, prélevées sur le viaduc Colo-Hugues, le fonctionnement structural réel du système Hennebique est évalué. Comprendre et modéliser le comportement du nouveau matériau composite fut une problématique fondamentale pour accroître l'usage du béton armé au début du 20ème siècle. Actuellement, il s'agit de réévaluer le comportement de ces structures. Trois essais jusqu'à rupture ont été menés, au département BATir de l'Université libre de Bruxelles, sur des poutres à gousset en T provenant du viaduc Colo-Hugues en conditions isostatiques et soumises à flexion. Ce viaduc des chemins de fer vicinaux est un cas d'étude représentatif de la majorité des constructions Hennebique, car la poutre de section en T est la structure typique du système Hennebique, utilisée tant dans les ouvrages d'art que dans les bâtiments. Le premier essai est une flexion 4 points sur une travée complète du viaduc (6 m de portée) pour obtenir la réponse en zone de moment maximum positif. La rupture ductile a eu lieu par plastification des armatures suivie d'un écrasement du béton en zone centrale, c'est-à-dire dans la zone la plus sollicitée. Deux éléments identiques de longueur de 4 m ont été essayés en flexion 3 points pour représenter le comportement sur appuis. La rupture de ces deux dernières expériences s'est produite suite à un glissement des armatures sur appuis (goussets à côté de la colonne). Il s'agit donc d'une rupture à caractère fragile. Les trois essais combinés représentent correctement la structure hyperstatique du viaduc dans son fonctionnement en service. La capacité portante réelle du système Hennebique en service et à l'état limite ultime, du moins dans un cas de chargement, a pu être expliquée. Ces essais fournissent les données essentielles pour estimer l'efficacité structurale du système Hennebique et identifier ses faiblesses. Deux solutions de renforcement sont proposées en complément d'information.

- Les pathologies observées dans les bétons armés datant du début du 20ème siècle (nids de graviers, corrosion des armatures, etc.) sont, la plupart du temps, causées par les outils sommaires à la disposition des constructeurs (vibration à la main, rapport eau/ciment plus élevé qu'aujourd'hui, etc.) et par une connaissance limitée des phénomènes physiques et chimiques, surtout à long terme. En fait, la qualité du béton du viaduc Colo-Hugues est particulièrement satisfaisante malgré l'âge avancé du béton, grâce notamment à l'enduit recouvrant l'ensemble du viaduc, ce qui est le cas pour la majorité des structures de la période étudiée.

Cette recherche démontre que les constructions en béton armé datant de 1880 à 1914 diffèrent des ouvrages postérieurs en béton armé et qu'il serait utile pour leur restauration de tenir compte de ces spécificités. La connaissance approfondie des particularités des constructions en béton armé de première génération permettra, espérons-le, de contribuer à leur longévité en intervenant le moins possible sur les structures d'origine. Etant donné que l'étude des structures existantes nécessite le plus souvent une approche pluridisciplinaire, ce travail pourrait être poursuivi dans plusieurs domaines variés. Il resterait notamment à approfondir d'autres aspects de stabilité, comme par exemple la démonstration de l'efficacité à l'effort tranchant du système Hennebique ou encore la prise en considération plus détaillée des armatures (adhérence limitée, forme d'ancrage particulier, etc.).
Doctorat en Sciences de l'ingénieur
info:eu-repo/semantics/nonPublished

A presente pesquisa propôs a análise de todos os vinte contos que compõem a obra Marcovaldo ou As estações na cidade (2015 [1963]), de Italo Calvino. O foco das análises voltou-se para o protagonista, Marcovaldo, um trabalhador pobre e em permanente estado de desconforto com as mudanças ocorridas no contexto social pós-guerra, especialmente na Itália, no período de seu milagre econômico, que foi impulsionado pelo fim de medidas protecionistas na economia (GINSBORG, 2003). Ao tentar romper com esse cenário, buscando a beleza genuína da natureza, Marcovaldo vê-se experienciando situações que sempre o levam ao descontentamento, intrinsecamente ligado a um novo tipo de relação humana e social, construída a partir não somente da consolidação das sociedades capitalistas modernas, como igualmente da imposição de um padrão único de comportamento à sociedade — a mutação antropológica, como proposto por Pier Paolo Pasolini (1978, 1997). A pesquisa debruçou-se sobre o olhar Ecocrítico (GARRARD, 2006), despertado pela obra em questão, que sugere, a partir da Literatura (e da incorporação de outras áreas como a Sociologia, a Biologia, a Antropologia), o estudo da natureza, suas relações com a mulher e o homem e o refinamento da percepção acerca de questões ecológicas frágeis, captadas com mais afinco a partir da década de 1960 (PIGA; MANSANO, 2015), apesar de as mudanças de perspectiva sobre a sensibilidade em relação à natureza estarem em constante modificação principalmente desde o Iluminismo (THOMAS, 2010 [1983]). A esta pesquisa foram igualmente incorporados pressupostos da Ecosofia (GUATTARI, 2006 [1989]), que sugere um ressignificar de procedimentos e discursos hegemônicos advindos do sistema sócio-político-econômico capitalista. Para tanto, fez-se necessário, conjuntamente, compreender problemáticas concernentes à conjuntura ambiental do século XX e seu impacto sobre as classes menos favorecidas economicamente (BOFF, 1995), assim como assimilar os desdobramentos referentes ao ecologismo dos pobres (via econômica baseada na justiça social), preconizado por Joan Martínez Alier (2014 [2007]), tendo em vista a classe social à qual Marcovaldo pertence. Alicerçada nos princípios descritos, a esta pesquisa coube, portanto, analisar as interações de Marcovaldo e sua família com a natureza e suas possibilidades, suas modificações e incorporação a um efervescente mercado consumidor, com vistas a refletir sobre a crise ecológica (das três ecologias, conforme Guattari) e assinalar hipóteses de superação para a mesma, por meio da apologia de um convívio menos predatório do ser humano relativamente aos outros seres que ao seu lado coabitam na Terra.
The present research proposed the analysis of all twenty short stories that compose the book Marcovaldo or the seasons in the city (2015 [1963]), by Italo Calvino. The analyses focused on the protagonist, Marcovaldo, an impoverished proletarian that finds himself in a continuous state of discomfort with the changes that occurred in the post-war social context, especially in Italy during the period of the economic miracle, which was driven by the end of protectionist measures in the economy (GINSBORG, 2003). In trying to break away from this scenario, seeking the genuine beauty of nature, Marcovaldo ends up experiencing situations that always lead him to a discontent that is inextricably linked to a new kind of human and social relationship, built not only on the consolidation of modern capitalist societies, but also on the imposition of a single standard of behavior on society – an anthropological mutation, as proposed by Pier Paolo Pasolini (1978, 1997). The research focused on the Ecocritical approach (GARRARD, 2006), awakened by the object, which suggests the study (incorporating references from areas such as Sociology, Biology and Anthropology to Literary Theory) of nature, its relationship with women and men, and the refining of perceptions about delicate ecological issues, captured more intensively since the 1960s (PIGA, MANSANO, 2015), although the changes in perspective on sensitivity to nature are constantly shifting, mainly since the Enlightenment (THOMAS, 2010 [1983]). This research also integrated the assumptions of Ecosophy (GUATTARI, 2006 [1989]), which suggests a re-signifying of hegemonic procedures and discourses derived from the capitalist socio-political-economic system. In order to do so, it was necessary, jointly, to understand issues related to the environmental context of the twentieth century and its impact on economically disadvantaged classes (BOFF, 1995), as well as to assimilate the consequences related to the environmentalism of the poor, advocated by Joan Martínez Alier (2014 [2007]), in view of the social class to which Marcovaldo belongs. Based on the principles described, this research therefore had to analyze the interactions of Marcovaldo and his family with nature and its possibilities, its modifications and assimilation into an effervescent consumer market, aiming to reflect on the ecological crisis (of the three ecologies, according to Guattari) and point out hypotheses of overcoming it, by means of the apology of a less predatory human conviviality in relation to the other beings that, with them, live on planet Earth.

A thesis submitted to the Faculty of Humanities of the University of the Witwatersrand, Johannesburg, in partial fulfilment of the requirements for the degree of Doctor of Philosophy in History, August 2017
This study uses both primary and secondary sources to investigate the history of the communities living in the southern Mozambique hinterland in the 20th century. It specifically examines the evolution of the colonial hunting laws and the establishment of hunting reserves in southern Mozambique. In this thesis, I argue that the Portuguese colonial administration put little effort into the protection of fauna and ecosystems in the south western Mozambique hinterland. Portuguese hunting laws were issued to provide the colonial system with revenue – through a system of fees imposed on licensed hunters when entering Mozambican forests and hunting reserves – rather than to improve fauna management. Colonial laws (particularly fees for the hunting permits) made it difficult for the majority of local African peasants to access game resources, on which during periods of drought and lack of foodstuffs they depended for subsistence. The study explores the extent to which postcolonial development projects affected conservation and the livelihoods of communities living in conservation areas. It shows how the period following independence was also characterised by mass killing of wildlife. In 1978, as part of the construction of the Massingir dam, Frelimo government officials relocated families living along the Elephants valley to areas having poor soils in Coutada 16, thus reducing the ability of the cultivators to produce enough food to sustain their families. Lack of food supplies increased the dependence of local families on bush meat for food. The armed conflict, which broke out immediately after independence in 1975 and lasted until 1992, contributed to the mass killing of wildlife, as both government soldiers and RENAMO fighters exploited bush for food. The end of the armed conflict allowed the Government of Mozambique (GoM) to implement projects aimed at rehabilitating the ecosystems destroyed by war and the transformation of Coutada 16 into the Limpopo National Park (LNP) in 2001. In 2002, the integration of the LNP into the Great Limpopo Transfrontier Park (GLTP) turned into reality Hertzog´s 1927 desire to create a transnational conservation area across the South Africa – Mozambique border.
XL2018

Text in Afrikaans
In hierdie navorsingsverslag word die omgewingsgerigte poësie van Johann Lodewyk Marais ondersoek. Marais se verskuns word onder meer as “groen”, “omgewingsgerig”, “ekopoëties”, “bioregionaal” en “biogeografies” beskryf en kritici is dit eens dat sy oeuvre ‘n sterk bewaringsingesteldheid vertoon. Marais se eiesoortige bydrae tot die bewaringsdiskoers (deur sowel sy verse as kritiese uitsprake) word hier geëvalueer aan die hand van sekere sleutelkonsepte uit die museum- en bewaringswetenskap wat telkens as metafore in sy poësie figureer: taksonomie, taksidermie en diorama. Saamgelees met Halloran se idee van die teks as argivale ruimte of museum, word hierdie konsepte (naamlik taksonomie, taksidermie en diorama) voorgehou as ‘n leesstrategie waarmee die bewaringsgesinde poësie van Marais gedekodeer kan word.
This research report focuses on the environmental poetry of Johann Lodewyk Marais. His poetry has been described as “green”, “environmental”, “ecopoetical”, “bioregional” and “biogeographical” and critics agree that the oeuvre displays a strong element of conservation and even preservation. Marais’s unique contribution towards this discourse of conservation is assessed by utilising certain key concepts from museology, which frequently manifests in his poetry as metaphors: taxonomy, taxidermy and diorama. Halloran’s notion of the text as archival space or museum, read in tandem with these concepts of taxonomy, taxidermy and diorama, is then presented as a reading strategy for decoding Marais’s poetry.
Afrikaans & Theory of Literature
M.A. (Afrikaans)

This dissertation explores human interactions with Toronto’s Don River Valley from the late eighteenth century to the present, focusing on the period of intense urbanization and industrialization between 1880 and 1940. Its concentration on the urban fringe generates new perspectives on the social and environmental consequences of urban development. From its position on the margins, the Don performed vital functions for the urban economy as a provider of raw materials and a sink for wastes. Insights derived from the intersections between social and environmental history are at the heart of this project. The dissertation begins by documenting the industrial history of the river and its transformation from a central provider in the lives of early Toronto residents to a polluted periphery in the latter half of the nineteenth century. An analysis of the valley’s related function as a repository for human “undesirables” reveals connections between the processes that identified certain individuals as deficient “others” and similar imperatives at work in classifying difficult or unpredictable environments as “waste spaces.” Efforts to “reclaim” and improve the river are the subject of the remaining chapters. A series of initiatives between 1870 and 1930 aimed at reconfiguring the lower Don as an efficient corridor for transportation and industrial development reveal in their shortcomings and unintended consequences a failure to accommodate dynamic and often unpredictable ecological processes. Reclamations of a different kind are explored in the conservation movement of the twentieth century, through which the valley emerges as a valuable public amenity. The dissertation concludes by investigating how the valley’s history informs current plans to “renaturalize” the river mouth. Throughout, the Don functions as an autonomous and causal force in the city’s history. On this small river on the urban fringe, nature and society worked in mutually constitutive ways to shape and reshape the metropolis.

M.A.
In Afrikaans poetry, Nature is depicted in terms of the relationship existing among and / or inanimate organisms, i. e. an ecological mode. Man's influence on the environment, features strongly in the poetry of the eighties. The anthology, Groen (J. L. Marais), can be seen as a focal point of this involvement. Chapter one provides an overview of the ecological code in Afrikaans poetry, spanning the time from the First Afrikaans Language Movement up till the seventies. With regard to this period, the different approaches of the poets to Nature are being studied. During this era a decidedly dynamic approach to the subject existed. Nature was initially seen as the idyllic, soothing and was also used as a metaphor for beauty and purity. With time, Nature took on another dimension and came to represent destructive forces. In chapter two, the anthology Groen by J. L. Marais, under discussion in this work, concluding the eighties, Man is called to task, i. e. to protect and nurture the balance in the ecology. Man is made aware of both the threat to and the conservation of nature. These binary forces are discussed with reference to two semantic devices, cohesion and coherence. As binding factors they provide a semantic light on the above themes. Verweerde aardbol by J. L. Marais, is approached along the same lines in chapter three. The specific themes used in this anthology, serve as a classification aid. The poet's concern about the transience of nature comes to the fore, and Marais himself states that the time has come for writers to be called up in service to the environment without being apologetic about it (Marais 1993: 32). A clear paradigm shift is visible from the infant years of Afrikaans poetry to the poetry of the eighties. The "green"-awareness which inflamed / inspired the community, plays an important role in the eighties and is reflected in Afrikaans poetry. The dynamic power of the ecological code as theme, still has many untapped areas which can be explored in further studies.

In this dissertation it is argued that literary theories have traditionally extended abundant attention on authors and texts, neglecting, with very few exceptions, the impor- tant role of the READER. To address this imbalance, par- ticular attention will be paid to the view of Wolfgang Iser, that a literary text can only elicit a response when it is read, and that it is virtually impossible to describe this response without also analysing the READING PROCESS. I share this view as it makes logical sense: a literary text remains meaningless, a mere 'paper and ink' production without the involvement of the reader. It is also the reader's own com- petence, his sense of aesthetic perception which enables him to make sense of the, in the literary text embedded message, hence the title: "The Nature of Aesthetic Perception in Literature. The Interaction between Text and Reader in the Process of Perceiving Literary Texts."
Afrikaans & Theory of Literature
M.A. (Theory of Literature)

Includes bibliographical references (leaves 313-325)
[6], 325 leaves ; 30 cm.
Specific concern is the poetic, as well as literal, significance given to the environment, and in particular to land, as a measure of belonging in Australia. Environment is explored in the context of ecologies, offered here as an alternative configuration of the nation, and in which the subject, through human and non-human environmental relations, can be culturally and spatially positioned. Argues that both environment and ecology are narrowly defined in dominant discourses that pursue an ideal, certain and authentic belonging for non-indigenous Australians.
Thesis (Ph.D.)--University of Adelaide, Dept. of English, 2003

1 online resource (181 leaves)
This study relies on ecocriticism as the discipline benefitting the analysis of the imagery of nature in Konstantin Paustovsky’s prose. The objective of this approach is to demonstrate that Paustovsky’s prose goes beyond of what was expected from a Soviet writer by the socialist realist dogma. This thesis attempts to prove that an ecocritical approach validates his prose as being universal in its message and thus relevant to contemporary readers. Scholars of ecocriticism ask the following questions when analysing a nature-orientated prose: what values are expressed in nature-orientated literature, does the portrayal of nature reflects the cultural values of a nation as well as the way in which a person’s interaction with his natural environment enhances or hampers his spiritual development. The timeframe, within which Paustovsky wrote his prose, should be taken into account, because it coincides with the Lenin and Stalin regimes, when any criticism of the government including its nature conservation policies was impossible. The analysis of attitudes of the Russian people towards nature in Paustovksy’prose demonstrates that it evolved from the acceptance of the official stand to the one of criticism. This research resulted in the following conclusions: Firstly Paustovsky’s view with regard to ecological problems and his solutions to these problems are on par with those of modern ecologists. The writer, for example, proposes a holistic way to undertake nature conservation, such as replacing ruined forests by the same type of trees, not interfering in the cycles of nature and stresses the importance of scientific information on how to care of the natural environment. Secondly, it is through his presentation of nature that the author familiarises the reader with the essence of the Russian culture, which is totally intertwined with the manifestations of Russian nature, such as folklore, superstitions, cultural traditions and values attached to certain animals and trees Thirdly, it has been established that the ‘external’ natural landscape of a person namely his environment, undoubtedly influences his ‘internal landscape’, his psyche. This implies that the natural environment of a person will have an influence on his psychological make-up. It is assumed that this study, in particular the use of ecocriticism as a tool to analyse literature where nature plays a role, will shed new light on the role of nature in Russian prose. This is especially the case with regard to the way in which ecological issues such as nature conservation are treated.
Classics & World Languages
D. Litt. et Phil. (Russian)