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Simultaneous Grain Growth And Grain Refinement In Bulk Ultrafine-Grained Copper Under Tensile Deformation At Room Temperature, Hai Liang Yu, Cheng Lu, Anh Kiet Tieu, Hui Jun Li, Ajit R. Godbole, Charlie Kong, Xing Zhao
Simultaneous Grain Growth And Grain Refinement In Bulk Ultrafine-Grained Copper Under Tensile Deformation At Room Temperature, Hai Liang Yu, Cheng Lu, Anh Kiet Tieu, Hui Jun Li, Ajit R. Godbole, Charlie Kong, Xing Zhao
Faculty of Engineering and Information Sciences - Papers: Part A
Grain growth and grain refinement behavior during deformation determine the strength and ductility of ultrafine-grained materials. We used asymmetric cryorolling to fabricate ultrafine-grained copper sheets with an average grain width of 230 nm and having a laminate structure. The sheets show a high-true failure strain of 1.5. Observation of the microstructure at the fracture surface reveals that ultrafine laminate-structured grains were simultaneously transformed into both equiaxed nanograins and coarse grains under tensile deformation at room temperature.
On The Intrinsic Accuracy And Precision Of The Standardised Growth Curve (Sgc) And Global-Sgc (Gsgc) Methods For Equivalent Dose Determination: A Simulation Study, Jun Peng, Vasilis Pagonis, Bo Li
On The Intrinsic Accuracy And Precision Of The Standardised Growth Curve (Sgc) And Global-Sgc (Gsgc) Methods For Equivalent Dose Determination: A Simulation Study, Jun Peng, Vasilis Pagonis, Bo Li
Faculty of Science, Medicine and Health - Papers: part A
In optically stimulated luminescence (OSL) dating, the single aliquot regenerative-dose (SAR) method has been used extensively for determining equivalent doses (De) in quartz. A variation of the SAR method is the “standardised growth curve” (SGC) method, which has been used as an efficient procedure to save measurement time during dating studies. During the application of the SGC method one establishes the SGC and calculation of the De of an aliquot requires only measurement of the standardised natural dose signal. Recently, a “global standardised growth curve” (gSGC) method was developed as an improved version of the SGC procedure. During the application …
Do Visual Art Experiences In Early Childhood Settings Foster Educative Growth Or Stagnation?, Gai M. Lindsay
Do Visual Art Experiences In Early Childhood Settings Foster Educative Growth Or Stagnation?, Gai M. Lindsay
Faculty of Social Sciences - Papers (Archive)
This article offers findings from research that examined the visual art beliefs and pedagogy of early childhood educators and supports reflection about the educational merit of different types of visual art experience offered to children. The range of visual art experiences typically delivered in early childhood education settings varies significantly in method and purpose, yet there is little guidance to support early childhood educators to evaluate the visual art experiences they include in the curriculum or to consider their role as art educators. At the same time, the research literature suggests that pre- school educators lack confidence to make and …
Analysis Of A Chemostat Model With Variable Yield Coefficient And Substrate Inhibition: Contois Growth Kinetics, Rubayyi Turki Alqahtani, Mark I. Nelson, Annette L. Worthy
Analysis Of A Chemostat Model With Variable Yield Coefficient And Substrate Inhibition: Contois Growth Kinetics, Rubayyi Turki Alqahtani, Mark I. Nelson, Annette L. Worthy
Faculty of Engineering and Information Sciences - Papers: Part A
2015, Copyright Taylor & Francis Group, LLC. We analyze the steady-state operation of a generalized reactor model that encompasses a continuous flow bioreactor and an idealized continuous flow membrane reactor as limiting cases. The biochemical reaction kinetics is governed by a Contois growth model subject to noncompetitive substrate inhibition with a variable substrate yield coefficient. The steady-state performance of the reactor is predicted and stability of the steady-state solutions as a function of dimensionless residence time reported. Our results identified two cases of practical interest. The first feature corresponds to the case where solutions to both no-washout and washout conditions …
Bacterial Cellulose As A Support For The Growth Of Retinal Pigment Epithelium, Sara Goncalves, Jorge Padrao, Ines P. Rodrigues, J P. Silva, Vitor Sencadas, Senentxu Lanceros-Méndez, Henrique Girao, F Dourado, L R. Rodrigues
Bacterial Cellulose As A Support For The Growth Of Retinal Pigment Epithelium, Sara Goncalves, Jorge Padrao, Ines P. Rodrigues, J P. Silva, Vitor Sencadas, Senentxu Lanceros-Méndez, Henrique Girao, F Dourado, L R. Rodrigues
Faculty of Engineering and Information Sciences - Papers: Part A
The feasibility of bacterial cellulose (BC) as a novel substrate for retinal pigment epithelium (RPE) culture was evaluated. Thin (41.6 ± 2.2 μm of average thickness) and heat-dried BC substrates were surface-modified via acetylation and polysaccharide adsorption, using chitosan and carboxymethyl cellulose. All substrates were characterized according to their surface chemistry, wettability, energy, topography, and also regarding their permeability, dimensional stability, mechanical properties, and endotoxin content. Then, their ability to promote RPE cell adhesion and proliferation in vitro was assessed. All surface-modified BC substrates presented similar permeation coefficients with solutes of up to 300 kDa. Acetylation of BC decreased it's …
Multiplicative Modelling Of Four-Phase Microbial Growth, María Jesús Munoz-Lopez, Maureen P. Edwards, Ulrike Schumann, Robert S. Anderssen
Multiplicative Modelling Of Four-Phase Microbial Growth, María Jesús Munoz-Lopez, Maureen P. Edwards, Ulrike Schumann, Robert S. Anderssen
Faculty of Engineering and Information Sciences - Papers: Part A
Microbial growth curves, recording the four-phases (lag, growth, stationary, decay) of the dynamics of the surviving microbes, are regularly used to support decision-making in a wide variety of health related activities including food safety and pharmaceutical manufacture. Often, the decision-making reduces to a simple comparison of some particular feature of the four-phases, such as the time at which the number of surviving microbes reaches a maximum. Consequently, in order to obtain accurate estimates of such features, the first step is the determination, from experimental measurements, of a quantitative characterization (model) of the four-phases of the growth-decay dynamics involved, which is …
Multiple Semiclassical States For Coupled Schrödinger-Poisson Equations With Critical Exponential Growth, Zhisu Liu, Shangjiang Guo, Yanqin Fang
Multiple Semiclassical States For Coupled Schrödinger-Poisson Equations With Critical Exponential Growth, Zhisu Liu, Shangjiang Guo, Yanqin Fang
Faculty of Engineering and Information Sciences - Papers: Part A
In this paper, we study the multiplicity of positive solutions for a class of Schrödinger-Poisson systems. Working in a variational setting, we prove the existence and multiplicity of positive solutions for the system when the Plank's constant is small and the potential satisfies some suitable conditions. We show that the number of positive solutions depends on the profile of the potential and that each solution concentrates around its corresponding global minimum point of the potential in the semi-classical limit. We also study the exponential decay.
A Model For Acid-Mediated Tumour Growth With Nonlinear Acid Production Term, Andrew B. Holder, Marianito R. Rodrigo, Miguel A. Herrero
A Model For Acid-Mediated Tumour Growth With Nonlinear Acid Production Term, Andrew B. Holder, Marianito R. Rodrigo, Miguel A. Herrero
Faculty of Engineering and Information Sciences - Papers: Part A
This article considers a mathematical model for tumour growth based on an acid-mediated hypothesis, i.e. the assumption that tumour progression is facilitated by acidification of the region around the tumour-host interface. The resulting destruction of the normal tissue environment promotes tumour growth. We will derive and analyse a reaction-diffusion model for tumour progression that includes different aspects of pathological and healthy cell metabolism to check tumour growth. Our results can provide insights into the governing dynamics of invasive processes that may suggest possible intervention strategies, leading to the design of new and better experiments or treatments.
Detection Of Crack Growth In Rail Steel Using Acoustic Emission, Andrii Kostryzhev, C L. Davis, C Roberts
Detection Of Crack Growth In Rail Steel Using Acoustic Emission, Andrii Kostryzhev, C L. Davis, C Roberts
Faculty of Engineering and Information Sciences - Papers: Part A
Increased traffic speeds and axle loads on modern railways enhance rail track degradation. To eliminate track failure due to rail defects, a condition monitoring system requires methods for the early detection of defects which grow in service. Acoustic emission (AE) monitoring is the only non-destructive technique which might be applied online to study the defect growth under traffic loading. However, a high level of traffic noise and a limited signal from crack growth, especially at low crack growth rates, significantly complicate the AE signal analysis. In the present work, the AE monitoring of rail steel fatigue was carried out in …
Comment On "Accordion Vs. Quantum Tectonics: Insights Into Continental Growth Processes From The Paleozoic Of Eastern Gondwana" By Jonathan C. Aitchison, Solomon Buckman Gondwana Research, Volume 22, Issue 2, September 2012, Pages 674-680, C L. Fergusson
Faculty of Science, Medicine and Health - Papers: part A
In regard to the tectonic history of the Lachlan Fold Belt, Aitchison and Buckman (2012) argued that "numerous aspects of the observed geology appear to be incompatible with the existing model" and that an "alternative model envisages arc-continent collision events (quantum tectonics) as a primary means of large-scale continental growth". My purpose is to challenge these arguments and to question their interpretation that rapid continental growth in the Lachlan Fold Belt has been achieved by thrusting of an island arc over a passive margin.
Temperature Variability At The Larval Scale Affects Early Survival And Growth Of An Intertidal Barnacle, Justin A. Lathlean, David J. Ayre, Todd E. Minchinton
Temperature Variability At The Larval Scale Affects Early Survival And Growth Of An Intertidal Barnacle, Justin A. Lathlean, David J. Ayre, Todd E. Minchinton
Faculty of Science, Medicine and Health - Papers: part A
For rocky intertidal invertebrates, the transition from pelagic larva to benthic settler represents a critical life-history stage characterised by high mortality. This mortality has been attributed to biotic factors such as predation or individual larval quality, as well as to abiotic factors such as thermal or desiccation stresses. Surprisingly little is known about how temperature varies at very fine spatial scales relevant to newly settled larvae. We used infrared (IR) imagery to determine (1) whether in situ rocky substrates during aerial exposure exhibit repeatable fine-scale (1 mm) temperature variation at the larval scale, and (2) whether the presence of adult …
A Weak El Niño/Southern Oscillation With Delayed Seasonal Growth Around 4,300 Years Ago, H V. Mcgregor, M J. Fischer, M K. Gagan, David Fink, S J. Phipps, H Wong, C D. Woodroffe
A Weak El Niño/Southern Oscillation With Delayed Seasonal Growth Around 4,300 Years Ago, H V. Mcgregor, M J. Fischer, M K. Gagan, David Fink, S J. Phipps, H Wong, C D. Woodroffe
Faculty of Science, Medicine and Health - Papers: part A
Earth’s interannual climate variability is dominated by El Niño/Southern Oscillation (ENSO). Palaeoclimate records indicate a lower ENSO variance during the middle Holocene compared with today1, 2, 3, 4, 5, 6; however, model simulations have not reproduced the full magnitude of the changes7, 8, 9, 10, and whether external forcing drives large intrinsic ENSO variability11 is therefore a matter of considerable debate. Here we present a 175-year-long, monthly resolved oxygen isotope record, obtained from a Porites coral microatoll located on Kiritimati (Christmas) Island, in the NINO3.4 region of the central equatorial Pacific. Our quantitative record of ENSO variability about 4,300 years …
Modelling Microbial Growth In A Closed Environment, Maureen P. Edwards, Ulrike Schumann, Robert S. Anderssen
Modelling Microbial Growth In A Closed Environment, Maureen P. Edwards, Ulrike Schumann, Robert S. Anderssen
Faculty of Engineering and Information Sciences - Papers: Part A
The formulation of models for the growth of microbes (fungi; bacteria) must not only take account of the current number of the microbes but also of the effect of the environment in which the growth is occurring and of the type of measurements used to record the growth. In industrial processes, the effect of physiological (morphological) changes on the growth must be taken into account. When growth is occurring in an open environment which achieves an equilibrium (e.g. balancing growth and harvesting) and is measured as the time evolution of the total number of microbes present (alive and dead), autonomous …
Musculoskeletal And Estrogen Changes During The Adolescent Growth Spurt In Girls, Catherine Y. Wild, Julie R. Steele, Bridget J. Munro
Musculoskeletal And Estrogen Changes During The Adolescent Growth Spurt In Girls, Catherine Y. Wild, Julie R. Steele, Bridget J. Munro
Faculty of Health and Behavioural Sciences - Papers (Archive)
Introduction: The adolescent growth spurt is associated with rapid growth and hormonal changes, thought to contribute to the increased anterior cruciate ligament injury risk in girls. However, relatively little is known about these musculoskeletal and estrogen changes during the growth spurt in girls. Purpose: To investigate the longitudinal changes in estrogen as well as anterior knee laxity and lower limb strength and flexibility throughout the adolescent growth spurt in girls. Methods: Thirty-three healthy girls, age 10-13 yr, in Tanner stage II and 4-6 months from their peak height velocity were recruited. Participants were tested up to four times during the …
The Longitudinal Relationship Between Sleep Duration And Body Mass Index In Children: A Growth Mixture Modeling Approach, Christopher A. Magee, Peter Caputi, Donald C. Iverson
The Longitudinal Relationship Between Sleep Duration And Body Mass Index In Children: A Growth Mixture Modeling Approach, Christopher A. Magee, Peter Caputi, Donald C. Iverson
Faculty of Social Sciences - Papers (Archive)
OBJECTIVE: A growing number of studies indicate that shorter sleep durations could contribute to obesity in children. The objective of this article was to further examine the longitudinal relationship between sleep duration and body mass index (BMI) in children by using a growth mixture modeling approach. METHOD: This article used prospective data from the Longitudinal Study of Australian Children. Participants included 1079 children aged 4 to 5 years (2004) followed up until age 10 to 11 years (2010). Growth mixture modeling was performed to examine the longitudinal association between sleep duration and body mass index within distinct body mass index …
Does Health Capital Have Differential Effects On Economic Growth?, Arusha V. Cooray
Does Health Capital Have Differential Effects On Economic Growth?, Arusha V. Cooray
Faculty of Commerce - Papers (Archive)
Investigating the impact of health capital disaggregated by gender on economic growth in a sample of 210 countries over the 1990-2008 period, this study suggests that the influence of health capital across countries cannot be generalised. Results for the full sample indicate that health capital does not have a robust and significant effect on economic growth unless through their interactions with health expenditure and education. The results disaggregated by income group reveal that health capital has a positive robust influence on economic growth in high and upper middle income economies. In low and low middle income economies, health capital gains …
Degradation Of Azo Dye Acid Orange 7 In A Membrane Bioreactor By Pellets And Attached Growth Of Coriolus Versicolour, Faisal I. Hai, Kazuo Yamamoto, Fumiyuki Nakajima, Kensuke Fukushi, Long D. Nghiem, William E. Price, Bo Jin
Degradation Of Azo Dye Acid Orange 7 In A Membrane Bioreactor By Pellets And Attached Growth Of Coriolus Versicolour, Faisal I. Hai, Kazuo Yamamoto, Fumiyuki Nakajima, Kensuke Fukushi, Long D. Nghiem, William E. Price, Bo Jin
Faculty of Engineering and Information Sciences - Papers: Part A
The aim of this study was to systematically compare the degradation of azo dye acid orange 7 by spongy pellets and attached biofilm of Coriolus versicolour (NBRC 9791) in a membrane bioreactor (MBR) under non-sterile conditions. Mild stirring (35 rpm) resulted in spherical (φ = 0.5 cm), spongy pellets and concomitantly triggered high enzymatic activity of the fungus, allowing for excellent decolouration (>99%) of a synthetic wastewater containing the dye. However, bacterial contamination eventually damaged the fungus pellets, leading to decreased decolouration efficiency. Promotion of attached growth on a plastic support along with formation of spherical spongy pellets allowed …
Protocol For The Women And Their Children's Health (Watch) Study: A Cohort Of Pregnancy And Beyond, Alexis Hure, Clare Collins, Warwick B. Giles, Ian M. R Wright, Roger Smith
Protocol For The Women And Their Children's Health (Watch) Study: A Cohort Of Pregnancy And Beyond, Alexis Hure, Clare Collins, Warwick B. Giles, Ian M. R Wright, Roger Smith
Faculty of Science, Medicine and Health - Papers: part A
Background: The developmental origins of health and disease is a conceptual framework that helps explain the links between our early life exposures and later health outcomes, and is a burgeoning field of research. In this report, we describe the study protocol used in a prospective cohort of women recruited during pregnancy, with postnatal follow-up of the mothers and offspring. Methods: The Women And Their Children's Health (WATCH) cohort (n = 180 women) is being conducted at the John Hunter Hospital, Australia (from June 2006). Women attended study visits during pregnancy at 19, 24, 30, and 36 weeks' gestation. Postnatal follow-up …
Accordion Vs. Quantum Tectonics: Insights Into Continental Growth Processes From The Paleozoic Of Eastern Gondwanan, Jonathan C. Aitchison, Solomon Buckman
Accordion Vs. Quantum Tectonics: Insights Into Continental Growth Processes From The Paleozoic Of Eastern Gondwanan, Jonathan C. Aitchison, Solomon Buckman
Faculty of Science - Papers (Archive)
The Early Paleozoic Lachlan Fold Belt of eastern Australia is widely regarded as an ancient convergent plate margin beneath which paleo-Pacific (Panthalassic) oceanic lithosphere was continuously subducted. It is cited as the type example of a retreating accretionary orogeny. However, sandstone compositions, the sedimentological nature and timing of chert accumulation and overall stratigraphic architecture are not necessarily consistent with this model. We suggest an alternative explanation for growth of Gondwanan continental margin. Oceanic lithosphere outboard of the passive Gondwana continental margin was subducted beneath an extensive intra-oceanic island arc that now crops out as an allochthonous element (Macquarie arc) within …
Stock Market And Gdp Growth Volatility Spillovers, Indika Karunanayake, Abbas Valadkhani, Martin O'Brien
Stock Market And Gdp Growth Volatility Spillovers, Indika Karunanayake, Abbas Valadkhani, Martin O'Brien
Faculty of Commerce - Papers (Archive)
This paper examines the interplay between stock market returns and GDP growth rates in four Anglo-Saxon economies located in three separate continents (namely, the US, the UK, Canada and Australia). We analyse the dynamics of cross-country volatility transmission across these countries by using quarterly data from 1959 to 2010 and a multivariate GARCH model. Country specific cross-mean spillovers from GDP growth to stock market returns exist only from the US growth towards its stock market, while country specific cross-mean spillovers from stock market returns towards GDP growth exist in both the US and Australia. The US economy influences all three …
The Impact Of Migrant Remittances On Economic Growth: Evidence From South Asia, Arusha V. Cooray
The Impact Of Migrant Remittances On Economic Growth: Evidence From South Asia, Arusha V. Cooray
Faculty of Commerce - Papers (Archive)
Incorporating migrant remittances among other variables into a growth model, and employing panel data over the 1970-2008 period, this study investigates the impact of migrant remittances on economic growth in South Asia. Migrant remittances are found to have a significant positive effect on economic growth. A significant positive interactive effect of remittances on economic growth is detected through education and financial sector development.
Population Growth And Change: Implications For Australia's Cities And Regions, Pauline M. Mcguirk, Neil Argent
Population Growth And Change: Implications For Australia's Cities And Regions, Pauline M. Mcguirk, Neil Argent
Faculty of Social Sciences - Papers (Archive)
Australia's distinctive pattern of settlement has long presented a suite of social, economic, infrastructural, and environmental challenges for the nation's cities and regions. These challenges will be intensified by the population growth and dynamics anticipated in the 2010 Intergenerational Report. Future growth will inevitably have differential impacts for metropolitan, regional, and rural settlements, and for inland and coastal regions. This paper analyses current trends and likely directions in population change and distribution and the major implications for the nation's metropolitan and non-metropolitan areas. For Australia's cities, core issues include: access to affordable housing, suitable employment, infrastructure, and services; managing growth …
Joint Analysis Of Beef Growth And Carcass Quality Traits Through Calculation Of Co-Variance Components And Correlations., H R. Mirzaei, Arunas P. Verbyla, W. S. Pitchford
Joint Analysis Of Beef Growth And Carcass Quality Traits Through Calculation Of Co-Variance Components And Correlations., H R. Mirzaei, Arunas P. Verbyla, W. S. Pitchford
Faculty of Engineering and Information Sciences - Papers: Part A
A joint growth-carcass model using random regression was used to estimate the (co)variance components of beef cattle body weights and carcass quality traits and correlations between them. During a four-year period (1994-1997) of the Australian "southern crossbreeding project", mature Hereford cows (N = 581) were mated to 97 sires of Jersey, Wagyu, Angus, Hereford, South Devon, Limousin, and Belgian Blue breeds, resulting in 1141 calves. Data included 13 (for steers) and 8 (for heifers) body weight measurements approximately every 50 days from birth until slaughter and four carcass quality traits: hot standard carcass weight, rump fat depth, rib eye muscle …
Prediction Model Of A Joint Analysis Of Beef Growth And Carcass Quality Traits, H R. Mirzaei, Arunas P. Verbyla, Wayne S. Pitchford
Prediction Model Of A Joint Analysis Of Beef Growth And Carcass Quality Traits, H R. Mirzaei, Arunas P. Verbyla, Wayne S. Pitchford
Faculty of Engineering and Information Sciences - Papers: Part A
A joint growth-carcass analysis was conducted to develop equations for predicting carcass quality traits associated with variation in growth path of crossbred cattle. During a four-year period (1994-1997) of the Australian "Southern Crossbreeding Project", mature Hereford cows (r = 581) were mated to 97 sires of Jersey, Wagyu, Angus, Hereford, South Devon, Limousin, and Belgian Blue breeds, resulting in 1141 calves. Data included body weight measurements of steers and heifers from birth until slaughter and four carcass quality traits: hot standard carcass weight, rump fat depth, rib eye muscle area, and intramuscular fat content. The model provides nine outputs: median …
Modeling Of Crossbred Cattle Growth, Comparison Between Cubic And Piecewise Random Regression Models, H R. Mirzaei, Wayne S. Pitchford, Arunas P. Verbyla
Modeling Of Crossbred Cattle Growth, Comparison Between Cubic And Piecewise Random Regression Models, H R. Mirzaei, Wayne S. Pitchford, Arunas P. Verbyla
Faculty of Engineering and Information Sciences - Papers: Part A
Two analyses, cubic and piecewise random regression, were conducted to model growth of crossbred cattle from birth to about two years of age, investigating the ability of a piecewise procedure to fit growth traits without the complications of the cubic model. During a four-year period (1994-1997) of the Australian "Southern Crossbreeding Project", mature Hereford cows (N = 581) were mated to 97 sires of Angus, Belgian Blue, Hereford, Jersey, Limousin, South Devon, and Wagyu breeds, resulting in 1141 steers and heifers born over four years. Data included 13 (for steers) and eight (for heifers) live body weight measurements, made approximately …
Multiplicity Of Solutions For Quasilinear Elliptic Equations With Critical Exponential Growth, Yanqin Fang, Jihui Zhang
Multiplicity Of Solutions For Quasilinear Elliptic Equations With Critical Exponential Growth, Yanqin Fang, Jihui Zhang
Faculty of Engineering and Information Sciences - Papers: Part A
In this paper we consider a system of N-Laplacian elliptic equa- tions with critical exponential growth. The existence and multiplicity re- sults of solutions are obtained by a limit index method and Trudinger- Moser inequality.
Cross Country Co-Movements Of Gdp Growth Rates: Are They Systematic?, Abbas Valadkhani, Charles Harvie
Cross Country Co-Movements Of Gdp Growth Rates: Are They Systematic?, Abbas Valadkhani, Charles Harvie
Faculty of Commerce - Papers (Archive)
Using factor analysis this paper examines discernable patterns of real GDP growth comovementsacross 97 countries, using consistent time series data for the period 1961-2008.Of these countries only 21 are found to form three statistically significant groupings, wheremembership count exceeds more than two. Ten major OECD European countries plus Japanand Hong Kong form the first well-defined common bloc of countries (G12). The second bloc,consisting of six major Asian countries (G6), have GDP growth rates that exhibit a very highdegree of correlation, based on their robust factor loadings. The last group of countiescollectively witnessed a very substantial degree of cross-country growth co-movementsconstituted …
Novel Technique Shows Different Hydrophobic Chemical Signatures Of Exotic And Indigenous Plant Soils With Similar Effects Of Extracts On Indigenous Species Seedling Growth, Emilie-Jane Ens, Kristine O. French, John B. Bremner, Jurgen Korth
Novel Technique Shows Different Hydrophobic Chemical Signatures Of Exotic And Indigenous Plant Soils With Similar Effects Of Extracts On Indigenous Species Seedling Growth, Emilie-Jane Ens, Kristine O. French, John B. Bremner, Jurgen Korth
Faculty of Science - Papers (Archive)
Changes to ecosystem abiotic parameters are regarded as possible mechanisms facilitating plant invasion and community composition shifts. This study compared the hydrophobic chemical signatures of soil from exotic bitou bush (Chrysanthemoides monilifera spp. rotundata) invaded, indigenous acacia (Acacia longifolia var. sophorae) dominated and bare sand (unvegetated) habitats using a novel, rapid, capturing technique which utilised AmberliteA (R) XAD4 resin filled bags that were placed in situ. The hydrophobic chemical signature of the bitou bush soil extract was significantly different to the acacia soil and bare sand extracts. High concentrations of 18 sesquiterpenes dominated the hydrophobic signature of the bitou bush …
The Hydraulic Geometry Of Narrow And Deep Channels; Evidence For Flow Optimisation And Controlled Peatland Growth, Rachel Nanson, Gerald C. Nanson, He Qing Huang
The Hydraulic Geometry Of Narrow And Deep Channels; Evidence For Flow Optimisation And Controlled Peatland Growth, Rachel Nanson, Gerald C. Nanson, He Qing Huang
Faculty of Science - Papers (Archive)
At-a-station and bankfull hydraulic geometry analyses of peatland channels at Barrington Tops, New South Wales, Australia, reveal adjustments in self-forming channels in the absence of sediment load. Using Rhodes ternary diagram, comparisons are made with hydraulic geometry data from self-forming channels carrying bedload in alluvial settings elsewhere. Despite constraints on channel depths caused at some locations by the restricted thickness of peat, most stations have cohesive, near-vertical, well-vegetated banks, and width/depth (w/d) ratios of similar to 2 that are optimal for sediment-free flow. Because banks are strong, resist erosion and can stand nearly vertical, and depth is sometimes constrained, adjustments …
In Situ Growth Of Sno2 On Graphene Nanosheets As Advanced Anode Materials For Rechargeable Lithium Batteries, Xiaowei Yang, Yu-Shi He, Xiao-Zhen Liao, Jun Chen, Gordon G. Wallace, Zi-Feng Ma
In Situ Growth Of Sno2 On Graphene Nanosheets As Advanced Anode Materials For Rechargeable Lithium Batteries, Xiaowei Yang, Yu-Shi He, Xiao-Zhen Liao, Jun Chen, Gordon G. Wallace, Zi-Feng Ma
Faculty of Science - Papers (Archive)
Graphene with a single layer of carbon atoms densely packed in a honeycomb crystal lattice is one of attractive materials for the intercalation of lithium ion, but it has low volumetric capacity owing to low tap density. We report a method for in situ growth of SnO2 on graphene nanosheets (SGN) as anode materials for rechargeable lithium batteries. The results indicated that the SnO2 nanoparticles with size in the range of 5-10 nm and a polycrystalline structure are homogeneously supported on graphene nanosheets. The charge and discharge capacities of SGN attained to 1559.7 and 779.7 mAh/g in the first cycle …