4,700 research outputs found
Diamond like carbon coatings for potential application in biological implants – a review
No full textProduction of wear debris has been linked to the failure of numerous hip implants. With the current focus on increasing the implant longevity, thus wear and corrosion resistance is important. Hard coatings have the potential to reduce the wear and corrosion. Diamond like Carbon (DLC) coatings exhibit properties that could make them viable for implants. This paper critically reviews previously published research into usage of DLC coatings for implants. Overall DLCs seem to be an effective coating for implants but with the variance in results, further testing is required for clarification of us
Simple drag prediction strategies for an Autonomous Underwater Vehicle’s hull shape
No full textThe range of an AUV is dictated by its finite energy source and minimising the energy consumption is required to maximise its endurance. One option to extend the endurance is by obtaining the optimum hydrodynamic hull shape with balancing the trade-off between computational cost and fluid dynamic fidelity. An AUV hull form has been optimised to obtain low resistance hull. Hydrodynamic optimisation of hull form has been carried out by employing five parametric geometry models with a streamlined constraint. Three Genetic Algorithm optimisation procedures are applied by three simple drag predictions which are based on the potential flow method. The results highlight the effectiveness of considering the proposed hull shape optimisation procedure for the early stage of AUV hull desig
Port of Abbot Point Long-Term Seagrass Monitoring Program - 2017: A Report for North Queensland Bulk Ports Corporation
No full text[Extract] A long-term seagrass monitoring program and strategy were established in the Abbot Point region in 2008. The original program involved quarterly monitoring of biomass, distribution and species composition of key representative seagrass meadows. Photosynthetic Active Radiation (PAR) and temperature within the seagrass meadows were also monitored until 2016. In the past, the program has included manipulative experiments investigating seagrass recovery, recruitment processes and seed bank reserves after disturbance, and five broad-scale surveys of all seagrass in the region. In 2015 quarterly monitoring was reduced to annual assessments, with broader scale regional surveys being completed every three years (last completed in 2016 – for a full distribution of seagrasses and species within the broader port limits see McKenna et al. 2017). Monitoring in 2017 focussed on five inshore seagrass meadows and four offshore monitoring sites selected for long term monitoring
THE CORRELATION OF THE MEDIEVAL EUROPEAN STATE AND LAW IN THE DOCTRINE OF P.A. KROPOTKIN
No full textThe actual task of Russian state studies and jurisprudence remains the opposition to the ideological and theoretical constructions of Russian classical anarchism. Purpose: to establish the most significant features and disadvantages of P.A. Kropotkin’s interpretation of the correlation of state and law on the example of Medieval Europe. When writing the article, the author applies interdisciplinary and class approaches. General scientific and specific scientific methods are used: historical, problem-theoretical, formal-logical, textual. Materials: monuments of law, other historical sources, foreign and national historiography. The analysis shows that P.A. Kropotkin’s works are characterised not only by a pronounced anti-exploitation pathos, but also by an equally pronounced tendentiousness. Results: aprioriism, anti-statism and antilegism, radical localism, Eurocentrism, diffusionism, cyclism and catastrophism, clothed in the form of postulates, predetermined P.A. Kropotkin’s one-sided interpretations of the interaction of the medieval European state with positive and customary law. In the first case, it took a purely causative form, and in the second, it was predominantly conflictual. These are the key flaws of P.A. Kropotkin’s correlation concept
The familial influence on bilateral testicular germ cell cancer: Medical Research Council study TER2
No full textMecochirus Germar (Decapoda: Glypheoidea) in the Lower Cretaceous of Queensland
No full textJELL, P.A., WOODS, J.T. & COOK, A.G., May 2017. Mecochirus Germar (Decapoda: Glypheoidea) in the Lower Cretaceous of Queensland. Alcheringa 41, 514–523 ISSN 0311-5518. Three new species of glypheoid decapod crustaceans, Mecochirus mcclymontorum, M. bartholomaii and M. lanceolatus, are described from the late Aptian of the Eromanga, Carpentaria and Maryborough basins, respectively. The first two occur in the Doncaster Member of the Wallumbilla Formation and the last in the Maryborough Formation. This is the first record of Mecochirus Germar, 1827 or the Mecochiridae Van Straelen, 1925 in Australia and one of only a few Cretaceous occurrences of this largely Jurassic genus
RRS James Cook Cruise JC55, 13 Jan-22 Feb 2011. Bransfield Strait, the East Scotia Ridge and the Kemp Seamount Calderas, Cruise 3 of the NERC Consortium Grant ‘Chemosynthetically-driven ecosystems in the Southern Ocean: Ecology and Biogeography’ (ChEsSo).
No full textThe whole programme of JC55 changed with the extensive damage to the ROV Isis on day 5 of the 42-day cruise. As a result Plan B, an over-the-side science programme was put in place and sampling with CTD/SAPs, Megacore, gravity cores and SHRIMP. This limited a number of aspects of the sampling and visual observation of the seabed but resulted in a programme that achieved a remarkably high proportion of the objectives of the cruise. In the Bransfield Strait some hydrothermal activity was observed at Hook Ridge, together with areas of reducing sediment but no areas of extensive hydrothermal activity. A Middle Sister a small anomaly in the Eh readings on the CTD suggested hydrothermal release but visual observation of the seabed showed only sedimented and old areas of pillow lava. At the Axe (aka Edifice A), despite extensive CTDs, there was no evidence of any modern hydrothermal activity. At the three sites we did obtain excellent samples for geochemical and water analysis, as well as samples for microbial analysis, macrofaunal and isotope analysis. Megafauna and mosaic analysis was not possible because of the loss of use of Isis. On moving to the East Scotia Ridge at E9 we were able to use SHRIMP to locate the Twin Peaks area (first sighted in 2009) and obtain a third annual set of images over a specified area. Additional exploration did not find any additional vents to those found on JC42. Water column sampling in the plume for chemistry and microbiology was successful. At the Kemp seamount crater there were successful stations for water chemistry and microbiology. A long SHRIMP transect over the venting area within the caldera was particularly successful and this together with fine scale mosaicking gave a clear map of this venting field. Planned fine scale sampling and ROV swath could not be completed. A SHRIMP transect at the nearby recently-mapped Adventure caldera discovered a small vent site on the southern side of the crater. Lastly, we returned to the putative cold seep site off the southwestern end of South Georgia. High CH4 levels in the water column and reduced sediment in cores suggested methane release but two SHRIMP surveys revealed no evidence of surface expression of a cold seep
Journal of Shellfish Research 20 2 695 703 Southampton, USA: National Shellfisheries Association.
No full textBoth prokaryotes and eukaryotes express a set of highly conserved proteins in response to external and internal stress. The stressors include tissue trauma, anoxia, heavy metal toxicity, infection, changed salinity, and the most characterized, heat shock. The result is an expression of stress proteins or heat shock proteins (HSP's) which lead to protection of protein integrity, and also to tolerance under continued heat stress conditions. The Australian blacklip abalone Haliotis rubra is found principally in southern coastal waters and also in estuarine/bay environments. Estuarine/bay environments have greater fluctuations in environmental conditions, especially those of salinity and water temperature, than are found along oceanic coasts. Abalone from estuarine/bay and oceanic coastal environments were subjected to either increased temperature (2 degrees C/day for a total of 10 degrees C) or hyposalinity (80% seawater). Estuarine/bay abalone were less affected than the oceanic animals by temperature increase and also demonstrated the ability to volume regulate 3 h after the initial salinity shock. SDS-PAGE and Western blotting techniques, together with dot blots of total protein, using HSP70 specific antibodies, were used to detect HSP70s in the foot muscle of the animals and indicated an expression of HSP70 in response to heat shock in abalone, but not following hyposalinity shock. RT-PCR yielded a partial cDNA clone of HSP70 from the foot muscle.
Kammer, Henry (Birth, 1883-05-15)
No full textAddress: Cook & Addison# 6434/Pg. 33/1883/M W/twin/Ger./Am./P.A. Reck,MD.Original record filed in drawer labeled 'KAISER, M-KASSAN'
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