797 research outputs found
Reducing the cost of South Australia of achieving agreed salinity targets in the River Murray.
No full textPast irrigation development has lead to rising salt loads in the River Murray and its floodplains, and reduced river flows. Even in the absence of any further development, river and floodplain salt loading as the result of this irrigation is anticipated to grow over the decades. Any new development will bring additional salinity loads and further reduced River flows.Australia;river;salinity
RRS "John Murray" Cruise 13/79, 20 August - 6 September 1979. VFS "Gauss" recovery of moorings, 15 October - 24 October 1979. Contribution to the MARSEN experiment
No full textDNS of inertial wave attractors in a librating annulus with height-dependent gap width
No full textDirect numerical simulations (DNS) of inertial wave attractors have been carried out in a librating Taylor-Couette system with broken mirror symmetry in the radial-axial cross-section. The inertial wave excitation mechanism and its localisation at the edges was clarified by applying boundary layer theory. Additional resonance peaks in the simulated response spectra were found to agree with low-order wave attractors obtained by geometric ray tracing. Numerics and theory are in qualitative agreement with recent lab experiments
Maiestas webbi Zhang & Duan
No full textMaiestas webbi Zhang & Duan, new Australian record Maiestas webbi Zhang & Duan 2011: 32. Material examined: QUEENSLAND: 7 males, 4km up Black Mountain Road, via Kuranda 12–26.x.1982, malaise trap, (QDPI); 1 male, same data but 14.ix–12.x.1982, malaise trap (QDPI); 1 male, same data but 24.viii– 14.ix.1982 (QDPI); 1 male Long Pocket Laboratory, Indooroopilly, vii.1978, malaise trap (QDPI); 1 male, Tully Falls Rd, 31.iii.1976, J.F. Donaldson (QDPI); 1 male 22km WSW of Mareeba, 7.i.–12.ii.1985, Storey and Halfpapp (QDPI); 1 male, Wongabel State Forest, 6km S of Atherton, 10.xi–1.xii.1983, Storey and Brown (QDPI); 3 males, Broken River, Eungella, W of Mackay, 8.iv.1976, I.D. Galloway (QDPI); 2 males, Coen area, Cape York Peninsula, 6–12.v.1975, K.J. Houston (QDPI); 5 males, Prince of Wales Island, Torres Strait, 27–30.v.1969, A. Neboiss (NMV); 1 male, Brisbane, v.1977, K.J. Houston, malaise trap (QDPI); 6 males, State Forest near Caloundra Turnoff, 8.iii.1984, I.D. Galloway (QDPI); 1 male, 1km N of Rounded Hill, nr Hope Vale Mission, 5– 6.x.1980, J. Cardale, yellow trap (ANIC); 1 male, Maroochydore Hort. Res. Stn., Nambour, 22.iii–3.iv.1985 (QDPI); 4 males, same data but 3–15.iv.1985 (QDPI); 1 male, Palen Ck. 11km S. Rathdowney, 3.iii.1974, I.D. Galloway, sweeping grass (QDPI); 2 males, Cooper Creek, Beach 13km N of Daintree River, 25.iii.1976, I.D. Galloway (QDPI); 8 males, 17km SE of Rutland Plains, 24.iv.1983, J.F. Donaldson and J.F. Grimshaw, at light (QDPI); 1 male, McIIwraith Range, NE of Coen, Cape York Pen., 29.vi–5.vii.1976, J.F. Donaldson (QDPI); 1 male, Mount Baldy Rd via Atherton, vi.1981, J.D. Brown, malaise trap (QDPI); 1 male, Thornlands, 23–24.ii.1973, J.F. Donaldson, at light (QDPI); 1 male, Tolga scrub, 18.ii.1984, I.D. Galloway (QDPI); 1 male, Cape York, Stewart Range, 29.iv–3.v.1961, J.L. Gressitt (BPB); 1 male, nr Gamboola HS, 23.vii.1982, J.F. Donaldson, D-vac (QDPI); 1 male, Camp Mountain, SE Qld, 22–29.xii.1979, [E.N.] Marks, malaise trap, open sclerophyll gully. NEW SOUTH WALES: 1 male Doyalson / Bluehaven, 31.iii.1986, G.R. Brown, m. v.light (ASCU); 1 male, 2 females, Murray River, 10km N of Nth Dorrigo, 29.iii.1982, G.R. Brown and A.E. Westcott (ASCU); 1 male, Barrington House, via Salisbury, 12–14.iii.1980, malaise trap (QDPI); 1 male, Creek Bluehaven, 8km NE of Wyong, 31.iii.1986, G.R. Brown, m. v. light (ASCU). NORTHERN TERRITORY: 1 male, NTU, Darwin, 28.iii.2000, R. Blanche, J. Lloyd and L. Tran-Nguyen, (ASCU); 1 male, Maningrida, Arnhem Land, 22– 23.iii.1961, J.L. Gressitt, dusk to 8am (BPB). Diagnosis. This species can be distinguished from other Australian species by the presence of an internal strut of the pygofer, the long curved apical process of the paramere, the well developed internal ridging of the subgenital plate and the presence of a prominent heel at the base of the aedeagus where it meets the connective. Distribution. Australia (NSW, NT, Qld), China Note: The widespread distribution of this species across northern Australia may mean it occurs naturally in the region and its presence in China indicates it is probably present in much of Southeastern Asia.Published as part of Fletcher, Murray J. & Dai, Wu, 2018, Two new species of Maiestas Distant (Hemiptera: Cicadellidae: Deltocephalinae: Deltocephalini) with a new record from Australia, pp. 430-440 in Zootaxa 4521 (3) on pages 433-434, DOI: 10.11646/zootaxa.4521.3.8, http://zenodo.org/record/261000
japonicus
No full textBromus japonicus Thunberg ex MurrayJapanese brome;Japanese chessbrome du Japonjaponicus11 km ENE of Couttsdry mixed grassland: rolling prairie - sand of roadside ditch bank and disturbed meadow3320 fee
Simultaneous localization and map-building using active vision
No full textAn active approach to sensing can provide the focused measurement capability over a wide field of view which allows correctly formulated Simultaneous Localization and Map-Building (SLAM) to be implemented with vision, permitting repeatable long-term localization using only naturally occurring, automatically-detected features. In this paper, we present the first example of a general system for autonomous localization using active vision, enabled here by a high-performance stereo head, addressing such issues as uncertainty-based measurement selection, automatic map-maintenance, and goal-directed steering. We present varied real-time experiments in a complex environment.Published versio
Intradermal immunization with a bovine herpesvirus-1 DNA vaccine induces protective immunity in cattle
No full textAlthough intramuscular (i.m.) injection of DNA encoding glycoprotein D (gD) of bovine herpesvirus-1 (BHV-1) induces immune responses in cattle, this route of delivery is inefficient. Here we assessed three parameters that may enhance the efficacy of a gD DNA vaccine in cattle. First, the immune response generated by i.m. injected plasmid expressing a secreted form of gD (tgD) was determined and found to be very similar in magnitude to the response induced by gD-expressing plasmid. Secondly, gD- and tgD-expressing plasmids were administered by intradermal (i.d.) immunization, which resulted in a superior immune response to the secreted form, but no improvement in the response to the membrane-associated form. However, the form of gD used for immunization did not influence the immunoglobulin subtype, the ratio of antigen-specific IgG1 to IgG2 being approximately 4:1. Finally, the effect of promoter strength was assessed by replacing the Rous sarcoma virus (RSV) promoter, which was used in the original experiments, with the human cytomegalovirus immediate early promoter and first intron A (HCMV/IA). Although upon transfection in vitro the HCMV/IA promoter appeared to be stronger than the RSV promoter, there was only a 2-fold higher antibody response in vivo upon i.d. injection of cattle. Protection against virus challenge was obtained in the calves immunized i.d. with tgD-encoding plasmid, as shown by a significant reduction in weight loss, virus excretion, temperature response and clinical disease. No significant protection was observed in the animals vaccinated i.d. with the gD-expressing plasmid, which correlates with the lower level of immunity pre-challenge.ID: 3643; LR: 20081121; JID: 0077340; 0 (Antibodies, Viral); 0 (Immunoglobulin G); 0 (Vaccines, DNA); 0 (Viral Proteins); 0 (Viral Vaccines); 0 (bovine herpesvirus type-1 glycoproteins); 82115-62-6 (Interferon-gamma); ppublishSource type: Electronic(1
Gas path analysis for the MTT micro turbine
No full textGas turbine diagnostics is as old as the gas turbine itself. Over the years, performance based diagnostics allowed for a shift from time-based maintenance to more economical condition based maintenance playing a fundamental role in enhancing the availability and reliability of gas turbines. By monitoring the condition of the engine over time, maintenance actions can be taken based on information collected from the field. MTT (Micro Turbine Technology) is currently developing a low cost 3kWe micro-turbine CHP (Combined Heat and Power)-system by using off-the-shelf technologies. Once the system will be launched on the market an organized, cost-effective maintenance procedure will be required. The objective of this M. Sc. thesis project was to develop and demonstrate a Gas Path Analysis diagnostic concept for the micro-turbine. Gas Path Analysis (GPA) is a method to assess the condition of the gas turbine by using performance measurements from the gas path. The feasibility of the diagnostic concept was demonstrated by some case studies using data from the first generation field test units. After reviewing a number of gas turbine diagnostic techniques, a non-linear model based gas path analysis approach was chosen. For the development of the diagnostic concept, a non-linear model of a healthy reference engine was used to simulate the off-design behaviour of the engine and derive healthy performance parameter baselines. These baselines are used to compare the performance of field engines against. A component based modelling environment called GSP or the Gas turbine Simulation Program was used to simulate the effect of ambient conditions and deterioration on performance. The diagnostic concept relies on the principle that deterioration causes corrected measurement parameters to shift from the healthy reference baselines. Measurement performance parameters are first corrected to standard ISA conditions before being compared against the healthy baselines. By modelling specific types of deterioration in GSP, signature parameter shifts could be recorded for each of the deterioration modes. These signature parameter shifts are used to compare shifts in performance parameters against and determine the closest pattern-match which can be used to identify the most probable cause of deterioration. The proposed concept is capable of performing engine level diagnostics and partially component level diagnostics. Multiple fault diagnostics and quantifying the level of deterioration are more difficult due to the limited number of sensors and the relatively large impact of second-order effects such as heat-loss, auxiliary power take-off, mechanical losses, etc. The performance parameter baselines together with the derived rulesets can easily be implemented in a maintenance tool making the concept flexible and easy to use.MastersFlight performance and propulsionAerospace Engineerin
Parallel implementation of interior-point methods for semidefinite optimization
No full textElectrical Engineering, Mathematics and Computer Scienc
Plant composition of three woodland communities of variable condition in the western Riverina, New South Wales, Australia
No full textWe examined differences in floristics among three regionally-threatened woodland communities in the western Riverina: Blackbox (Eucalyptus largiflorens), Bimble box-Pine (Eucalyptus populnea-Callitris glaucophylla) and Boree (Acacia pendula) between 2001 and 2004. Our aim was to examine possible relationships between the diversity and biomass of groundstorey vegetation, and remnant condition and rainfall both among communities and across years. The three woodland communities varied widely in their plant species composition, with only 22% of the 358 species common to all communities. Seven species, mainly exotic grasses and forbs, contributed 25% of the total cover across all sites and times. Blackbox communities had the greatest number of exotic and annual species. There were poor relationships between condition and diversity, richness, evenness or abundance of groundstorey plant species within 400 m2 quadrats. Overall, sites in better condition tended to support a greater cover of native plants and a lower cover of exotic plants (Blackbox only). There were only weak relationships between rainfall and biomass. The marked variation in species diversity in relation to changing seasonal conditions and within similar condition classes highlights the difficulties of developing benchmarks for separating the effects of management, and seasonal and longer-term climate change
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