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Y ECO: Yellowstone Ecological Center for Observation: Author: Kahler, Bradley Scott; Date: 2008-05-15; Program: Architecture; Abstract: The Yellowstone Ecological Center for Observation (Y Eco) is designed to function as an educational facility that employs sustainable and ecological methods. Y Eco incorporates a living machine (an all-natural water purification system utilizing micro-organisms, various plants, etc.), various alternative energy resources (i.e. photovoltaic arrays, vertical wind turbines, hydro-electric in-stream turbines), as well as other passive and active sustainable and ecological design methods. An elevated pedestrian bridge forms Y Eco's "spine" and provides direct access to over 700 acres...; Download File | View full details

Robust copper braze for hermetic sealing of solid oxide fuel cells: Author: Ator, Danielle Elizabeth; Date: 2008-08-15; Program: Mechanical Engineering; Abstract: Solid oxide fuel cells (SOFCs) are becoming of increasing interest as a primary power source in today's industrial market. The voltage of a single cell under load is approximately 0.7 volts necessitating the use of many cells in series to generate useful electrical potentials, which gives rise to the SOFC stack. One of the key technical challenges in improving the long term performance and reliability of stacks is in the effective sealing of stack interfaces, particularly in planar stacks for which a hot seal (700-900°C) is required. SOFC stack seals must be: resistant to oxidation...; Download File | View full details