This is a story about the boundaried nature of stories and the storied nature of boundaries. It concerns a modern ‘scientific’ boundary: the West Australian border. In the process of trying to locate Aboriginal boundaries in a native title claim, this border is revealed as problematic and bent, and as rooted in the colonial history of the last 500 years. The tensions between Western and Aboriginal conceptions of boundaries open up a space for the exploration of the hidden social and narratological dimensions of land and knowledge, ownership, and authority.
This article presents an investigation to provide students with the opportunity to study the physics of
electromagnetic radiation, particularly UV radiation, and the way it interacts with different environments.
The protective ability of shade structures is generally misunderstood, and this investigation will give
students the basic knowledge that even though shade structures protect the human body from direct UV
radiation, it is now the diffuse UV radiation that is significant in the shade.
We build on Bohr's (1948) conjecture that complementarity has applications in domains of knowledge beyond the discipline of physics. Specifically, we examine the relevance and usefulness of Bohr’s notion of complementarity along with his revised definition of the term ‘phenomenon’ to the field of occupational science. We discuss how Bohr's (1948) redefinition of the term ‘phenomena’ is congruent with Husserl’s (1931) introduction of the term ‘intersubjectivity’ into phenomenology. We propose a reconceptualisation of occupation that, we suggest, aligns with Bohr’s suggestions, as well as with Husserl’s concept of intersubjectivity. We consider conditions concerning the concept of ‘phenomena’, before proceeding to state logical requirements for complementarity in relation to occupation. We argue that occupation is not a phenomenon; it involves a multiplicity of phenomena (some of which might be complementary). This leads to the development of a number of suggestions concerning complementarity between aspects of occupation. We take into account two discrete approaches to occupational science: the transactional perspective of occupation (TPO) and the occupational perspective of health (OPH). We propose that each of these perspectives is amenable to consideration from the perspective of complementarity.
Exposure to UV radiation is known to be a causative factor in the induction of skin cancers and other sun-related disorders. Most acute responses of humans to UV exposure occur as a result of UVB (280 to 315 nm) exposures, as these wavelengths are highly sensitive in creating a human biological response. However, this does not mean that UVA radiation has no impact on human UV exposures and health. UVA can cause erythema in human skin, yet, the exposures required to create such a response is much larger than UVB radiation. UVA radiation penetrates much deeper into human skin tissue than UVB, resulting in impacts that are not as acute, taking many years to manifest. Past research has shown that UVA (315 to 400 nm) plays a significant role in human skin carcinogenesis. Studies have also shown that UVA plays an important role in skin damage, immune suppression, DNA damage, photoageing and wrinkling. Researchers at the University of Southern Queensland have developed a personal UV dosimeter that can quantitatively assess long term solar UVA exposures. The chemical polyphenylene oxide, cast in thin film form and which is responsive to both the UVA and UVB part of the spectrum was used and filtered with mylar. This combined system responded to the UVA wavelengths only and underwent a change in optical absorbance as a result of UVA exposure. Preliminary results indicate that this UVA dosimeter saturates reasonably slowly when exposed to sunlight and can measure exposures of more than 20 MJm-2 of solar UVA radiation with an uncertainty level of no more than ± 5%.
South American rock art and prehistory with all its controversies is a rich site for exploring the processes of territorialization through which humans shape their understanding of the world in their earliest movements through the environment, and also for examining how narratives of prehistory are woven. The paper examines the debate over the Cerutti Mastodon and why Serra da Capivara, one of the largest rock art complexes in the world, remains in analytic limbo. It suggests that rethinking these two examples may offer a possible way out of some of the analytic difficulties in South American prehistory through a decolonizing approach to understanding the reasons for the rejection of the Cerutti Mastodon, and the lack of recognition of Serra da Capivara’s most important site – Bocqueirã da Pedra Furada (PBF).
The aims of this paper were to investigate how glass filtered UV irradiances vary with glass thickness, lamination of the glass and the effect of SZA, and to measure the glass filtered UV exposures to different receiving planes with a newly developed UVA dosimeter. Spectroradiometric and dosimetric techniques were employed in the experimental approach. The percentage of the glass filtered solar UV compared to the unfiltered UV ranged from 59% to 70% and was influenced to a small extent by the glass thickness and the solar zenith angle (SZA). The laminated glass transmitted 11 to 12% and the windscreen glass transmitted 2.5 to 2.6%. The influence of the SZA was less for the thicker glass than it was for the thinner glass. The change in transmission was less than 14% for the SZA between 48° and 71°. There was negligible influence due to the SZA on the glass transmitted UV of the laminated and windscreen glass. The influence of the glass thickness in the range of 2 mm to 6 mm on the percentage transmission was less than 16%. The influences of the glass thickness and the SZA on the glass transmitted UV have been incorporated in the use of a UVA dosimeter for the glass transmitted UV exposures. The UVA dosimeter was employed in the field to measure the glass filtered UV exposures to different receiving planes. The UVA dosimeter reported has the potential for personal solar UVA exposure measurements.
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