138 resultados para WHITE ELECTROLUMINESCENCE


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Weathering refers to the degradation of wool fibres that occur during growth from exposure of the fleece to sunlight, water and air. Weathering damage to Merino wool reduces quantities of fibre that are harvested, reduces length in both raw and processed wools, reduces spinning performance and dyeing outcomes. This work aimed to aimed to quantify if and to what extent weathering occurred in 38 lots of commercial dehaired white cashmere and cashmere top sourced from traditional and new origins of production and the extent of any association between weathering and tensile strength properties of the dehaired cashmere and cashmere top. The cashmere was tested for physical properties, bundle tenacity and extension, tristimulus values brightness (Y) and yellowness (Y-Z) and reflectance. Dye uptake was used as an index of weathering. Linear models, relating to weathering, bundle tenacity and Y-Z were fitted to origin and other objective measurements. Mean attributes (range) were: mean fibre diameter, 17.0 μm (13.5–21.3 μm); bundle tenacity of tops, 10.3 cN/tex (8.3–12.9 cN/tex), for dehaired fibre, 10.1 cN/tex (9.1–11.4 cN/tex). Stain uptake varied from 0.92 to 6.34 mg/g fibre indicating a six-fold variation in the extent of weathering. Both the extent of weathering and the bundle tenacity of commercial lots of cashmere were affected by the origin of the cashmere. Increased weathering reduced bundle tenacity, bundle extension, increased the yellowness and reduced reflectance of white cashmere. Bundle tenacity of cashmere declined as fibre diameter variability increased from 20 to 22.5%. For the samples tested, the cashmere from China, Mongolia, Afghanistan and Iran showed more weathering than cashmere from Australia, New Zealand and the USA. The differences in the extent of weathering and of bundle tenacity between cashmere from different origins were of commercial significance.

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 The Welcome to Country (WTC) ceremony and its twin, the Acknowledgement of Traditional Owners, have become prominent anti-racist rituals in the post-settler society of Australia. These rituals are rich in meaning. They are simultaneously emblems of colonisation and dispossession; of recognition and reconciliation; and a periodic focus of political posturing. This article analyses the multiple meanings of WTC ceremonies. In particular, I explore the politics of belonging elicited by WTC and Acknowledgement rituals. Drawing on ethnography of non-Indigenous people who work in Indigenous affairs, I argue that widespread enjoyment of these rituals among White anti-racists is explained because they paradoxically experience belonging through a sense of not belonging.

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This article examines the news media coverage surrounding the death of Aboriginal man Trevor Duroux, who was killed by a coward's punch. The 'big' media failed to pay this tragic death any attention. The articles attempts to explain why.