13 resultados para Ice.

em Deakin Research Online - Australia


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In this paper, we describe how a wiki has been used to help break the ice between cultures in an online subject. The number of International student enrollments has been on the increase in recent years and therefore the student demographics within the classroom have changed. It is the intension of this paper to show how a wiki has been implemented to promote interaction between students from different cultures.

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The calling seasonality of blue (Balaenoptera musculus) and fin (B. physalus) whales was assessed using acoustic data recorded on seven autonomous acoustic recording packages (ARPs) deployed from March 2001 to February 2003 in the Western Antarctic Peninsula. Automatic detection and acoustic power analysis methods were used for determining presence and absence of whale calls. Blue whale calls were detected year round, on average 177 days per year, with peak calling in March and April, and a secondary peak in October and November. Lowest calling rates occurred between June and September, and in December. Fin whale calling rates were seasonal with calls detected between February and June (on average 51 days/year), and peak calling in May. Sea ice formed a month later and retreated a month earlier in 2001 than in 2002 over all recording sites. During the entire deployment period, detected calls of both species of whales showed negative correlation with sea ice concentrations at all sites, suggesting an absence of blue and fin whales in areas covered with sea ice. A conservative density estimate of calling whales from the acoustic data yields 0.43 calling blue whales per 1000 n mi2 and 1.30 calling fin whales per 1000 n mi2, which is about one-third higher than the density of blue whales and approximately equal to the density of fin whales estimated from the visual surveys.


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Objective: To examine the relative effectiveness of ice therapy and/or pulsed electromagnetic field in reducing pain and swelling after the immobilization period following a distal radius fracture.Methods: A total of 83 subjects were randomly allocated to receive 30 minutes of either ice plus pulsed electromagnetic field (group A); ice plus sham pulsed electromagnetic field (group B); pulsed electromagnetic field alone (group C), or sham pulsed electromagnetic field treatment for 5 consecutive days (group D). All subjects received a standard home exercise programme. A visual analogue scale was used for recording pain; volumetric displacement for measuring the swelling of the forearm; and a hand-held goniometer for measuring the range of wrist motions before treatment on days 1, 3 and 5.Results: At day 5, a significantly greater cumulative reduction in the visual analogue scores as well as ulnar deviation range of motion was found in group A than the other 3 groups. For volumetric measurement and pronation, participants in group A performed better than subjects in group D but not those in group B.Conclusion: The addition of pulsed electromagnetic field to ice therapy produces better overall treatment outcomes than ice alone, or pulsed electromagnetic field alone in pain reduction and range of joint motion in ulnar deviation and flexion for a distal radius fracture after an immobilization period of 6 weeks.

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Between 1884 and 1920 the Society was part of an intense period of international geographical interest, imperialism and nationalism. This empirical history shows that the Society sought to explore New Guinea, Northern and Central Australia, and Antarctica, pursuing issues of land use, labour and commercial development of these regions.

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In this study on pure water ice, we show that protonated water species [H2O]nH+ are more prevalent than (H2O)n+ ions after bombardment by Au+ monoatomic and Au3+ and C60+ polyatomic projectiles. This data also reveals significant differences in water cluster yields under bombardment by these three projectiles. The amino acid alanine and the nucleic base adenine in solution have been studied and have been shown to have an effect on the water cluster ion yields observed using an Au3+ ion beam.

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Secondary ion emission from water ice has been studied using Au+, Au3+, and C60+ primary ions. In contrast to the gas phase in which the spectra are dominated by the (H2O)nH+ series of ions, the spectra from ice using all three primary ions are principally composed of two series of cluster ions (H2O)nH+ and (H2O)n+. Dependent on the conditions, the unprotonated series can dominate the spectra. Since in the gas phase (H2O)n+ is unstable with respect to the formation of the protonated ion series, the presence of the solid must provide a means to stabilize their formation. The cluster ion yields under Au+ bombardment are very low and can be understood in terms of sputtering on the borderline between linear cascade and thermal spike behavior. There is a 104 increase in yield across the whole spectrum compared to Au+ when Au3+ and C60+ species are used as primary ions. The character of the spectra differed between these two primary ions, but insights into the mechanism of secondary ion emission for both is discussed within an energy deposition framework provided by the fluid flow-based mesoscale energy deposition footprint (MEDF) model that predicts a cone-shaped zone of activation and emission. C60+ differs from Au3+ in that it delivers its energy closer to the surface, and it is argued this has consequences for the cluster ion distribution and yield. Increasing the ion dose by sputtering suppresses the yield of (H2O)n+ and increases the yield of the protonated ions in the small cluster region, whereas the yield in the large cluster regime is suppressed significantly. The three primary ions show rather different behavior, and this is discussed in the light of the sputtering models. Finally, negative ion spectra including cluster ions have been observed for the first time. C60+ delivers the highest yields, but these are less than 10 times the positive ion yields, probably because the O and OH fragment ions on which the clusters are based are easily neutralized by protons.

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The management of the ice cream factory concerned in this study strongly felt the importance of undertaking a waste audit of its biggest waste generator, the ice cream plant. Ice cream wastewater constitutes as much as 74% of the total volume of wastewater discharged by the company to the central treatment plant of the Industrial Estate in which the factory is situated. Generation of ice cream wastes is attributed to the high consumptive use of water in the plant for washing and cleaning operations. As a result of waste auditing, methods were proposed to save water and to segregate the waste, and to modify the existing wastewater treatment system of the ice cream plant for better treatment efficiency.

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This thesis investigated the extent to which sea-ice structure and complexity could be measured to identify suitable feeding habitat for krill-eating predators such as the Antarctic minke whale (Balaenoptera bonaerensis). The results of this study suggest that the distribution and movement of minke whales is limited by the structure of the sea ice and that the sea ice influences minke whales' habitat use more than their overall distribution. Similar relationships were found for other krill predators such as Adelie penguins and crabeater seals.

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ABSTRACT
Iranian architecture is shaped in related to its Hot - Dry climate and has provided interesting answers to the Iranian's needs. In this climate, most of the buildings are constructed by mud or sun - dried bricks. There are so many facilities that Iranian architecture has provided for better living such as: Wind - Catcher (which exhausts warm air from buildings during the day), Cisterns (which have a cylindrical store place in the depth of the earth for storing the cold fresh water during the hot seasons), Ice - Houses with walls behind which water in shallow channels friezes at nights, etc. The great heritage of Iranian architecture and traditions are still not known until now. The cons- tructing traditions of vernacular architecture in Iran, reveals the mystery of using natural energy sources that reduce the need to fossil fuel. Among different Iranian cultural heritage, Ice-Houses are selected as the main subject of this article.

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In the vast majority of migratory bird species studied so far, spring migration has been found to proceed faster than autumn migration. In spring, selection pressures for rapid migration are purportedly higher, and migratory conditions such as food supply, daylength, and/or wind support may be better than in autumn. In swans, however, spring migration appears to be slower than autumn migration. Based on a comparison of tundra swan Cygnus columbianus tracking data with long-term temperature data from wheather stations, it has previously been suggested that this was due to a capital breeding strategy (gathering resources for breeding during spring migration) and/or to ice cover constraining spring but not autumn migration. Here we directly test the hypothesis that Bewick's swans Cygnus columbianus bewickii follow the ice front in spring, but not in autumn, by comparing three years of GPS tracking data from individual swans with concurrent ice cover data at five important migratory stop-over sites. In general, ice constrained the swans in the middle part of spring migration, but not in the first (no ice cover was present in the first part) nor in the last part. In autumn, the swans migrated far ahead of ice formation, possibly in order to prevent being trapped by an early onset of winter. We conclude that spring migration in swans is slower than autumn migration because spring migration speed is constrained by ice cover. This restriction to spring migration speed may be more common in northerly migrating birds that rely on freshwater resources. © 2013 The Authors.

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In light of new legislation pertaining to information and consultation in the UK, the need to reassess the realms of employee involvement and participation, especially non-union forms, is critically apparent. This article explores the character of non-union employee representation arrangements established in the context of the Information and Consultation of Employees Regulations 2004, drawing on case study evidence from two UK-based manufacturing organisations. The findings highlight some important dynamics concerning the use of non-union employee representation; not least that the Information and Consultation of Employees Regulations have impacted in very different ways from those anticipated by the legislation.