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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
21

La notion de simplicité comme concept de création dans la musique contemporaine en Allemagne : positionnement entre sources et légitimation / The notion of simplicity as a design concept in contemporary music in Germany : positioning between sources and legitimation

Waschbüsch, Viviane 05 December 2016 (has links)
Cette thèse propose une approche transversale entre différentes disciplines : musicologie historique, musicologie analytique (analyse des œuvres et génétique de l’œuvre) et sociologie des arts (analyse socio-économique et analyse sociologique de la trajectoire de l’œuvre). Les compositeurs de la « Nouvelle Simplicité » sont à l’origine d’un courant compositionnel très large réintégrant les formes musicales traditionnelles dans une interprétation nouvelle, réactivant la fonction de la polarité des consonances et des dissonances. La notion de « simplicité » et les idées qui ont émergé de ce concept ont ainsi été un catalyseur qui a participé à l’établissement du postmodernisme en Allemagne. Toutefois, la génération de la « Nouvelle Simplicité » et leurs idées et concepts en communs ont trouvé une fin brutale avec la chute du mur de Berlin et les changements culturels et politiques induits par ce bouleversement. Les évolutions politiques et la création d’une nouvelle Akademie der Künste Berlin qui représentait une fusion de l’Akademie der Künste Berlin est et ouest ont abouti à une opposition entre deux signataires du premier manifeste de cette génération de compositeurs : W. Rihm, avec son abstention du débat, et H-J. von Bose, avec son retrait de l’Akadémie der Künste Berlin (il sera suivi de plusieurs autres artistes tels que G. Ligeti et G. Baselitz). Cela marque la fin définitive de la collaboration de cette génération de compositeurs. / This thesis proposes a cross-disciplinary approach between: historical musicology, analytical musicology (analysis of pieces and the genetics of the piece) and art sociology (socio- economic analysis and sociological analysis of artistic practice). The "New Simplicity" composers were the source of a very wide compositional current reintegrating traditional musical forms in a new interpretation, reactivating the function of the polarity of consonance and dissonance. The notion of "simplicity" and ideas that emerged from this concept were a catalyst that contributed to the establishment of postmodernism in Germany. However, the generation of the "New Simplicity" and their shared ideas and concepts came to an abrupt end with the fall of the Berlin Wall and the cultural and political changes induced by this upheaval. Political developments and the creation of a new Akademie der Künste Berlin representing a fusion of Akademie der Künste Berlin East and West led to an opposing position between two first manifesto signatories of this generation of composers: W. Rihm with his abstention from the debate and H-J. von Bose with his withdrawal from the Akademie der Künste Berlin in common with many other artists such as G. Ligeti and G. Baselitz, marking the definitive end of the collaboration of this generation of composers.
22

Synthesis, Characterization and Catalytic Studies of Carbon-Based Nano Materials

Yan, Qiangu 30 April 2011 (has links)
Nano-scaled carbons were produced by thermal treatment of pine wood chips and bio-char. The influence of temperature, heating rate, pyrolysis time, and type and flow rate of purge gas on the production of nano-carbons was investigated. Using TEM and SEM, different carbon-based nanomaterials were observed in the prepared samples. The effect of metal ion doping on the bio-char was also investigated. Highly functionalized nano carbonaceous materials were synthesized by low temperature hydrothermal carbonization (HTC) using glucose, sucrose, xylose, and cellulose. Carbon-encapsulated iron (Fe@C) core-shell particles were also synthesized by the HTC method and used as catalyst for Fischer-Tropsch synthesis to produce liquid hydrocarbons from syngas; it showed excellent activity. Nano-structured Co-Mo carbides over several nano-sized carbon materials were prepared using the carbothermal reduction and carbothermal hydrogen reduction methods. Nano-structured Co-Mo carbides derived from Vulcan® XC-72 were used as the catalyst to produce higher alcohols.

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