Search Results - "Karunaratne, S.B."

Environmental factors and spatial dependence explain half of the inherent variation in carbon pools of tropical paddy soils by Paranavithana, T.M., Mohamed Anas, M.U., Karunaratne, S.B., Macdonald, B., Wimalathunge, N., Bishop, T.F.A., Ratnayake, R.R.

“…•Investigated key drivers of soil carbon pools and their interactions related to soil carbon cycling.•Identified unique and combined effects of macro, micro…”
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Identifying the spatial drivers and scale-specific variations of soil organic carbon in tropical ecosystems: A case study from Knuckles Forest Reserve in Sri Lanka by Rajapaksha, R.P.S.K., Karunaratne, S.B., Biswas, A., Paul, K., Madawala, H.M.S.P., Gunathilake, S.K., Ratnayake, R.R.

“…•Detailed analysis of below ground carbon (soil organic carbon) drivers with different scales in tropical forest ecosystem.•Provided firsthand information on…”
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Validation of digital soil maps at different spatial supports by Bishop, T.F.A., Horta, A., Karunaratne, S.B.

“…In this study we validated digital soil maps of clay content at different spatial supports; point, 48m blocks and soil–land use complexes (SLU). The aim being…”
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Using multispectral data from an unmanned aerial system to estimate pasture depletion during grazing by Alvarez-Hess, P.S., Thomson, A.L., Karunaratne, S.B., Douglas, M.L., Wright, M.M., Heard, J.W., Jacobs, J.L, Morse-McNabb, E.M., Wales, W.J., Auldist, M.J.

“…•UAV-borne systems can be used for estimating pasture depletion while cows graze.•The model using whole plot data and extreme values showed the best…”
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Multi-site calibration and validation of a wide-angle ultrasonic sensor and precise GPS to estimate pasture mass at the paddock scale by Lawson, A.R., Giri, K., Thomson, A.L., Karunaratne, S.B., Smith, K.F., Jacobs, J.L., Morse-McNabb, E.M.

“…•An ultrasonic sensor was robustly calibrated to allow estimation of pasture biomass.•A rising plate meter (RPM) was simultaneously calibrated in the same…”
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Unravelling spatial drivers of topsoil total carbon variability in tropical paddy soils of Sri Lanka by Paranavithana, T.M., Karunaratne, S.B., Wimalathunge, N., Malone, B.P., Macdonald, B., Bishop, T.F.A., Ratnayake, R.R.

“…This study aimed to map and identify the spatial drivers of total carbon (TC) concentration in topsoil (0–15 cm) across paddy-growing regions in tropical…”
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Catchment scale mapping of measureable soil organic carbon fractions by Karunaratne, S.B., Bishop, T.F.A., Baldock, J.A., Odeh, I.O.A.

“…This study aims to map the measurable fractions of soil organic carbon related to the RothC carbon model at the catchment scale and to assess the model and…”
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Impact of the establishment of a botanical garden on soil carbon sequestration and nutrient availability in tropical soils by Ratnayake, R.R., Chamari, Dinusha, Ekanayake, Sumith, Rajapaksha, K., Karunaratne, S.B., Wasantha Kumara, K.L.

“…The objective of the study was to identify the potential for soil C sequestration associated with the establishment of a botanical garden in the tropics. Since…”
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Digital soil mapping of organic carbon concentration in paddy growing soils of Northern Sri Lanka by Ratnayake, R.R., Karunaratne, S.B., Lessels, J.S., Yogenthiran, N., Rajapaksha, R.P.S.K., Gnanavelrajah, N.

“…In this study we explore the environmental covariates that are useful in mapping SOC contents in tropical paddy growing soils in Northern Sri Lanka. We carried…”
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Montmorillonite polyaniline nanocomposites: Preparation, characterization and investigation of mechanical properties by Soundararajah, Q.Y., Karunaratne, B.S.B., Rajapakse, R.M.G.

“…The interest in clay polymer nanocomposites (CPN) materials, initially developed by researchers at Toyota, has grown dramatically over the last decade. They…”
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Mechanical Properties of Poly(vinyl alcohol) Montmorillonite Nanocomposites by Soundararajah, Q.Y., Karunaratne, B.S.B., Rajapakse, R.M.G.

“…The properties of polymers are greatly enhanced when they are incorporated with silicate-layered clays as they find many applications in the fields of…”
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Fully densified zircon co-doped with iron and aluminium prepared by sol–gel processing by Alahakoon, W.P.C.M., Burrows, S.E., Howes, A.P., Karunaratne, B.S.B., Smith, M.E., Dobedoe, R.

“…A sol–gel technique has been used to prepare Fe and Al doped zircon. Structural properties have been studied by X-ray diffraction, nuclear magnetic resonance,…”
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Rare-earth-doped α′-Sialon ceramics with novel optical properties by Karunaratne, B. S. B., Lumby, R. J., Lewis, M. H.

“…A new phenomenon in the field of Sialon ceramics is reported which may lead to applications based on their optical or electronic properties in combination with…”
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Plasma-sprayed ceramic coatings for SiAlON ceramics by Karunaratne, B.S.B., Lewis, M.H.

“…Plasma-sprayed coatings of yttria-stabilized ZrO 2 and Al 2O 3. TiO 2 used as a protective barrier on β-Si 3N 4-based sialon ceramics were investigated. The…”
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Grain-boundary de-segregation and intergranular cohesion in Si-Al-O-N ceramics by Karunaratne, B. S. B., Lewis, M. H.

“…The effect of heat treatment on high-temperature creep and subcritical crack growth in hot-pressed beta prime Si-Al-O-N ceramics was analyzed microstructurally…”
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Moisture-enhanced strength degradation of a superconducting ceramic by KARUNARATNE, B. S. B, LEWIS, M. H

“…YBa2Cu3O7-x testbars were indented, then subjected to four point flexure at different loading rates. Fracture strength in moist air was lower than in dry and,…”
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