7 resultados para clausula rebus sic stantibus

em Deakin Research Online - Australia


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The Mundiad is a mock epic poem in heroic couplets. Modelled on structures of classical epics such as Homer's Iliad, Virgil's Aeneid and Milton's Paradise Lost, yet set in the contemporary world of globalisation, the poem celebrates the detritus of everyday life Kylie Minogue, pornography, new ageism, genetic engineering, IVF, screen culture, among many others. Reviving the ancient poetic ambition to speak differently about the things of this world, The Mundiad is startlingly original and is destined to be a cult classic.

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Substrate-induced coagulation (SIC) is a coating process based on self-assembly for coating different surfaces with fine particulate materials. The particles are dispersed in a suitable solvent and the stability of the dispersion is adjusted by additives. When a surface, pre-treated with a flocculant e.g. a polyelectrolyte, is dipped into the dispersion, it induces coagulation resulting in the deposition of the particles on the surface. A non-aqueous SIC process for carbon coating is presented, which can be performed in polar, aprotic solvents such as N-Methyl-2- pyrrolidinone (NMP). Polyvinylalcohol (PVA) is used to condition the surface of substrates such as mica, copperfoil, silicon-wafers and lithiumcobalt oxide powder, a cathode material used for Li-ion batteries. The subsequent SIC carbon coating produces uniform layers on the substrates and causes the conductivity of lithiumcobalt oxide to increase drastically, while retaining a high percentage of active battery material.

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Long and straight β-SiC nanowires are synthesized via the direct current arc discharge method with a mixture of silicon, graphite and silicon dioxide as the precursor. Detailed investigations with x-ray diffraction, scanning electron microscopy, energy dispersive x-ray spectroscopy, Raman scattering spectroscopy, transmission electron microscopy and selected area electron diffraction confirm that the β-SiC nanowires, which are about 100–200 nm in stem diameter and 10–20 µm in length, consist of a solid single-crystalline core along the (1 1 1) direction wrapped with an amorphous SiOx layer. A broad photoluminescence emission peak with a maximum at about 336 nm is observed at room temperature. A direct current arc plasma-assisted self-catalytic vapour–liquid–solid process is proposed as the growth mechanism of the β-SiC nanowires. This synthesis technique is capable of producing SiC nanowires free of metal contamination with a preferential growth direction and a high aspect ratio, without the designed addition of transition metals as catalysts.