Publications

Small world picture of worldwide seismic events

Publication ID: pub.1038827523

Keywords: Global; Q-exponential Distributions; Seismic Networks; Small-world Networks

The understanding of long-distance relations between seismic activities has for long been of interest to seismologists and geologists. In this paper we have used data from the worldwide earthquake catalog for the period between 1972 and 2011 to generate a network of sites around the world for earthquakes with magnitude m≥4.5 in the Richter scale. […]

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A primal–dual mimetic finite element scheme for the rotating shallow water equations on polygonal spherical meshes

Publication ID: pub.1044328081

Keywords: Compound Finite Element; Dual Finite Element; Mimetic; Shallow Water

A new numerical method is presented for solving the shallow water equations on a rotating sphere using quasi-uniform polygonal meshes. The method uses special families of finite element function spaces to mimic key mathematical properties of the continuous equations and thereby capture several desirable physical properties related to balance and conservation. The method relies on […]

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Moving climate change beyond the tragedy of the commons

Publication ID: pub.1110263322

Keywords: Climate Change; Collective Action; Decision-making; Dilemma; Global; Governance; Hardin; IPCC Special Report; Mobilise; Moral Values; Risks; Sciences; Shift; Society; Tragedy of the Commons

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Investigating the controls on soil organic matter decomposition in tussock tundra soil and permafrost after fire

Publication ID: pub.1022726382

Keywords: Alaska; Alaskan Arctic Soils; Anaktuvuk Fire; C Sequestration; North Slope; Soil Respiration; Tussock Tundra; US

Rapid warming in Arctic ecosystems is resulting in increased frequency of disturbances such as fires, changes in the distribution and productivity of different plant communities, increasing thaw depths in permafrost soils and greater nutrient availability, especially nitrogen. Individually and collectively, these factors have the potential to strongly affect soil C decomposition rates, with implications for […]

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Factors influencing the compressive strength of fly ash based geopolymers

Publication ID: pub.1053654119

Keywords: Alkali Activated Material; Alkali Dosages Optimisation; Fly Ash; Geopolymer; Mechanical Properties; Slag; Structural Characterisation; UK

Several factors affecting the reactivity of fly ash (FA) as a precursor for geopolymer concrete have been investigated. These include physical and chemical properties of various FA sources, inclusion of ground granulated blast furnace slag (ggbs), chemical activator dosages and curing temperature. Alkali-activated FA was found to require elevated curing temperatures and high alkali concentrations. […]

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