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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.
1

Reveries of a walk: Architectonics and an Attunement to Nature

Gunnels, Aeric Taylor 25 June 2018 (has links)
Architecture has been primarily ocularcentric for the last century. This thesis proposes a more sensible approach to architecture. A multisensory experience that gives the user a deeper response to the building. Architecture can activate and engage multiple senses through the revelation of nature such as: wind, light, and shadow. Architecture has the power to reveal the essence of nature and natural phenomena. It can also become a catalyst to help us understand nature and attain a deeper connection with it and ourselves. Through derived forms and attention to details, architects can capture the essence of nature without direct imitation. Architecture has always had the power to reveal. The architect must choose what is revealed. This thesis is an exploration into the idea of architecture as a revelation of nature in a specific climate, location, and context to allow the user to become more attuned to nature. Architecture can allow the users to explore and discover nature in a way that was previously ignored or overlooked, or perhaps it can reveal a phenomenon for the first time. Architecture can reveal nature through: orientation, material choices, form, function, openings, details, and spacing. Allowing natural phenomena to be a part of the design process creates a building attuned to nature. These revelations can occur with careful consideration to components, conditions, and details such as: wind, light, shadow, and structure. In order to achieve these, special consideration must be give to the tectonic and stereotomic construction. / Master of Architecture
2

Developing Dendrifrom Facades Using Flow Nets as a Design Aid

Houston, Jonas H. 01 December 2011 (has links) (PDF)
This thesis highlights a method of arriving at form that minimizes the need for high end technology and complex mathematical models, yet has structural principles of load flow at the highlighted methods core. Similar to how graphical statics assisted earlier architects and engineers to arrive at form by relating form and forces, this thesis suggests a method of form finding that relates the flow of stresses within solid masses to possible load-bearing façades. Looking to nature, where an abundance of efficient structural solutions can be found, this thesis focuses on a tree-like structural form called the dendriform. In doing so, this thesis explores the idea that through an understanding of typical load flow patterns and the removal of minimally stressed material of the solid body, dendriforms can be revealed that qualitatively exemplify load flow yet maintain an architectural aesthetic.
3

The behaviour of trace elements during the volcanic ash-liquid interaction : example of marine and human systems / Le comportement des éléments traces lors de l'interaction de cendres volcaniques-liquide : exemple des systèmes marins et l'homme

Randazzo, Loredana Antonella 15 April 2011 (has links)
Les processus d’interaction solide-liquide régulent les mécanismes qui régissent la disponibilité des oligo-éléments en phase liquide. Dans cet article, ces processus ont été étudiés grâce à l'utilisation des éléments de terres rares (REE), car ils sont d'excellents traceurs des processus géochimiques. Le but de la première partie de ce travail était d'étudier la réactivité des particules volcaniques lors de l'interaction avec l'eau de la mer synthétique. Les résultats montrent que en dehors de la dissolution, qui est le processus principal, un procédé d'adsorption de surface se produit également, probablement sur la surface des cristaux nouvellement formé. La présence supposée de ces minéraux est suggéré par la variation temporelle de l'Y/Ho, des observations SEM et analyse XRD. Enfin, l'ajout des ligand dissous ne pas augmenter le taux de dissolution des particules volcaniques, mais modifiant la distribution de REE en phase liquide. Dans la deuxième partie de ce travail, l'étude des terres rares a été appliquée à un système humain. Ces éléments ont été utilisés, en fait, d'enquêter sur les fluides du poumon (BAL) chez les personnes exposées aux retombées de cendres volcaniques. Le résultat suggère que la co-précipitation du YLn-phosphates se produisent dans les poumons, à la suite de l'inhalation de particules volcaniques. Ce processus est confirmé par des simulations thermodynamiques et cinétiques indiquant que la cristallisation de YLn-phosphates et d'autres phases authigènes apparaît comme la conséquence de la dissolution de la fraction solubles de cendres / The solid-liquid interaction processes regulate the mechanisms governing the availability of trace elements in liquid phase. In this paper, these processes have been studied through the use of the Rare Earth Elements (REE) since they are excellent tracers of geochemical processes. The purpose of the first part of this work was to study the reactivity of volcanic particulates during the interaction with synthetic seawater. The results show that apart from the dissolution, which is the main process, a surface adsorption process also occurs, probably on the surface of newly formed crystals. The supposed presence of these minerals is suggested by the temporal variation of the Y/Ho ratio, by SEM observations and XRD analysis. Finally the addition of ligand species to dissolved media does not increase dissolution rate of volcanic particles but modify the YLn distribution in liquid phase. In the second part of this work, the Rare Earth study was applied to a human system. These elements were used, in fact, to investigate the effects due to the interactions between the inhaled atmospheric particulate matter and the lung fluids (BAL), in people exposed to fallout of volcanic ash. The results suggest that YLn-phosphate co-precipitation occurs in lungs as a consequence of inhalation of volcanic particles and their interactions with lung fluids. This process is confirmed by thermodynamic and kinetic simulations indicating that crystallisation of YLn-phosphates and other authigenic phases occurs as a consequence of the soluble ash fraction dissolution. The combination of YLn fractionation in bronchial fluids can represent a potential tracer of exposure to atmospheric fallout

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