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  • Journal article
    Howe C, Milner-Gulland EJ, 2013,

    Response to Cunningham, S. and King, L. (2013)

    , Animal Conservation, Vol: 16, Pages: 139-140
  • Journal article
    Troxler Y, Wu B, Marinescu M, Yufit V, Patel Y, Marquis AJ, Brandon NP, Offer GJet al., 2013,

    The effect of thermal gradients on the performance of lithium ion batteries

    , Journal of Power Sources, Pages: accepted-accepted, ISSN: 0378-7753

    Abstract An experimental apparatus is described, in which Peltier elements are used for thermal control of lithium-ion cells under isothermal and non-isothermal conditions, i.e. to induce and maintain thermal gradients. Lithium-ion battery packs for automotive applications consist of hundreds of cells, and depending on the pack architecture, individual cells may experience non-uniform thermal boundary conditions. This paper presents the first study of the impact of artificially induced thermal gradients on cell performance. The charge transfer resistance of a 4.8 Ah is verified to have a strong temperature dependence following the Arrhenius law. Thermal cycling of the cell, combined with slow rate cyclic voltammetry, allows to rapidly identify phase transitions in electrodes, due to the thermal effect of entropy changes. A cell with a temperature gradient maintained across is found to have a lower impedance than one held at the theoretical average temperature. This feature is attributed to details of the inner structure of the cell, and to the non-linear temperature dependence of the charge transfer resistance.

  • Conference paper
    Markall GR, Rathgeber F, Mitchell L, Loriant N, Bertolli C, Kelly PHJ, Markall G, Rathgeber F, Ham D, Loriant N, Mitchell L, Bertolli C, Kelly Pet al., 2013,

    Performance-Portable Finite Element Assembly Using PyOP2 and FEniCS

    , International Supercomputing Conference (ISC), Publisher: Springer, Pages: 279-289, ISSN: 0302-9743

    We describe a toolchain that provides a fully automated compilation pathway from a finite element domain-specific language to low-level code for multicore and GPGPU platforms. We demonstrate that the generated code exceeds the performance of the best available alternatives, without requiring manual tuning or modification of the generated code. The toolchain can easily be integrated with existing finite element solvers, providing a means to add performance portable methods without having to rebuild an entire complex implementation from scratch.

  • Journal article
    Ferguson DJ, Maclennan J, Bastow ID, Pyle D, Jones SM, Keir D, Blundy DJ, Plank T, Yirgu Get al., 2013,

    Melting during late-stage rifting in Afar is hot and deep

    , Nature, Vol: 499, Pages: 70-74, ISSN: 0028-0836

    Investigations of a variety of continental rifts and margins worldwide have revealed that a considerable volume of melt can intrude into the crust during continental breakup(1-8), modifying its composition and thermal structure. However, it is unclear whether the cause of voluminous melt production at volcanic rifts is primarily increased mantle temperature or plate thinning(1,2,8-12). Also disputed is the extent to which plate stretching or thinning is uniform or varies with depth with the entire continental lithospheric mantle potentially being removed before plate rupture(13-16). Here we show that the extensive magmatism during rifting along the southern Red Sea rift in Afar, a unique region of sub-aerial transition from continental to oceanic rifting, is driven by deep melting of hotter-than-normal asthenosphere. Petrogenetic modelling shows that melts are predominantly generated at depths greater than 80 kilometres, implying the existence of a thick upper thermo-mechanical boundary layer in a rift system approaching the point of plate rupture. Numerical modelling of rift development shows that when breakup occurs at the slow extension rates observed in Afar, the survival of a thick plate is an inevitable consequence of conductive cooling of the lithosphere, even when the underlying asthenosphere is hot. Sustained magmatic activity during rifting in Afar thus requires persistently high mantle temperatures, which would allow melting at high pressure beneath the thick plate. If extensive plate thinning does occur during breakup it must do so abruptly at a late stage, immediately before the formation of the new ocean basin(16).

  • Journal article
    McRobie FH, Wang L-P, Onof C, Kenney Set al., 2013,

    A spatial-temporal rainfall generator for urban drainage design

    , WATER SCIENCE AND TECHNOLOGY, Vol: 68, Pages: 240-249, ISSN: 0273-1223
  • Journal article
    Donaghey JE, Sohn E-H, Ashraf RS, Anthopoulos TD, Watkins SE, Song K, Williams CK, McCulloch Iet al., 2013,

    Pyrroloindacenodithiophene polymers: the effect of molecular structure on OFET performance

    , POLYMER CHEMISTRY, Vol: 4, Pages: 3537-3544, ISSN: 1759-9954
  • Journal article
    Todman LC, Ireson AM, Butler AP, Templeton MRet al., 2013,

    Modelling vapor flow from a pervaporative irrigation system

    , Vadose Zone Journal
  • Journal article
    Kelley DI, Prentice IC, Harrison SP, Wang H, Simard M, Fisher JB, Willis KOet al., 2013,

    A comprehensive benchmarking system for evaluating global vegetation models

    , BIOGEOSCIENCES, Vol: 10, Pages: 3313-3340, ISSN: 1726-4170
  • Journal article
    Westacott P, Tumbleston JR, Shoaee S, Fearn S, Bannock JH, Gilchrist JB, Heutz S, DeMello J, Heeney M, Ade H, Durrant J, McPhail DS, Stingelin Net al., 2013,

    On the role of intermixed phases in organic photovoltaic blends

    , Energy & Environmental Science, ISSN: 1754-5692
  • Journal article
    Economopoulos SP, Chochos CL, Ioannidou HA, Neophytou M, Charilaou C, Zissimou GA, Frost JM, Sachetan T, Shahid M, Nelson J, Heeney M, Bradley DDC, Itskos G, Koutentis PA, Choulis SAet al., 2013,

    Novel BODIPY-based conjugated polymers donors for organic photovoltaic applications

    , RSC ADVANCES, Vol: 3, Pages: 10221-10229, ISSN: 2046-2069
  • Journal article
    Salari H, Hallett JP, Padervand M, Gholami MRet al., 2013,

    Systems designed with an ionic liquid and molecular solvents to investigate the kinetics of an S<sub>N</sub>Ar reaction

    , PROGRESS IN REACTION KINETICS AND MECHANISM, Vol: 38, Pages: 157-170, ISSN: 1468-6783
  • Journal article
    Ireson AM, Butler AP, 2013,

    A critical assessment of simple recharge models: application to the UK Chalk

    , HYDROLOGY AND EARTH SYSTEM SCIENCES, Vol: 17, Pages: 2083-2096, ISSN: 1027-5606
  • Journal article
    Ryder CL, Highwood EJ, Rosenberg PD, Trembath J, Brooke JK, Bart M, Dean A, Crosier J, Dorsey J, Brindley H, Banks J, Marsham JH, McQuaid JB, Sodemann H, Washington Ret al., 2013,

    Optical properties of Saharan dust aerosol and contribution from the coarse mode as measured during the Fennec 2011 aircraft campaign

    , ATMOSPHERIC CHEMISTRY AND PHYSICS, Vol: 13, Pages: 303-325, ISSN: 1680-7316
  • Journal article
    Charman DJ, Beilman DW, Blaauw M, Booth RK, Brewer S, Chambers FM, Christen JA, Gallego-Sala A, Harrison SP, Hughes PDM, Jackson ST, Korhola A, Mauquoy D, Mitchell FJG, Prentice IC, van der Linden M, De Vleeschouwer F, Yu ZC, Alm J, Bauer IE, Corish YMC, Garneau M, Hohl V, Huang Y, Karofeld E, Le Roux G, Loisel J, Moschen R, Nichols JE, Nieminen TM, MacDonald GM, Phadtare NR, Rausch N, Sillasoo U, Swindles GT, Tuittila E-S, Ukonmaanaho L, Valiranta M, van Bellen S, van Geel B, Vitt DH, Zhao Yet al., 2013,

    Climate-related changes in peatland carbon accumulation during the last millennium

    , BIOGEOSCIENCES, Vol: 10, Pages: 929-944, ISSN: 1726-4170
  • Journal article
    Hadden RM, Rein G, Belcher CM, 2013,

    Study of the competing chemical reactions in the initiation and spread of smouldering combustion in peat

    , PROCEEDINGS OF THE COMBUSTION INSTITUTE, Vol: 34, Pages: 2547-2553, ISSN: 1540-7489
  • Book chapter
    Reich S, Cotter CJ, 2013,

    Ensemble filter techniques for intermittent data assimilation

    , Large Scale Inverse Problems. Computational Methods and Applications in the Earth Sciences, Editors: Cullen, Freitag, Kindermann, Scheichl, Publisher: Walter de Gruyter, Berlin, Pages: 1-46
  • Journal article
    Jones GA, Kendall J-M, Bastow ID, Raymer DGet al., 2013,

    On locating microseismic events using borehole data

    , Geophysical Prospecting, Pages: 1-16
  • Conference paper
    Bertolli C, Betts A, Mudalige GR, Loriant N, Ham D, Giles MB, Kelly PHJet al., 2013,

    Compiler optimizations for industrial unstructured mesh CFD applications on GPUs

    , International Workshop on Languages and Compilers for Parallel Computing (LCPC), Publisher: Springer, Pages: 112-126
  • Book chapter
    Waterman RJ, Klooster MR, Hentrich H, Bidartondo MIet al., 2013,

    Species interactions of mycoheterotrophic plants: specialization and its potential consequences.

    , Mycoheterotrophy, Editors: Merckx, New York, Publisher: Springer, Pages: 267-296, ISBN: 978-1-4614-5209-6
  • Book chapter
    Gennaioli C, Martin R, Muuls M, 2013,

    Using micro data to examine causal effects of climate policy

    , Handbook on Energy and Climate Change
  • Journal article
    Armitage JJ, Dunkley Jones T, Duller RA, Whittaker AC, Allen PAet al., 2013,

    Temporal buffering of climate-driven sediment flux cycles by transient catchment response

    , EARTH AND PLANETARY SCIENCE LETTERS, Vol: 369-370, Pages: 200-210
  • Journal article
    Jackson CA-L, Chua ST, Bell RE, Magee Cet al., 2013,

    Structural style and early stage growth of inversion structures: 3D seismic insights from the Egersund Basin, offshore Norway

    , Journal of Structural Geology, Vol: 46, Pages: 167-185
  • Journal article
    Bragg FJ, Prentice IC, Harrison SP, Eglinton G, Foster PN, Rommerskirchen F, Rullkoetter Jet al., 2013,

    Stable isotope and modelling evidence for CO<sub>2</sub> as a driver of glacial-interglacial vegetation shifts in southern Africa

    , BIOGEOSCIENCES, Vol: 10, Pages: 2001-2010, ISSN: 1726-4170
  • Conference paper
    Reeve MT, Bell RE, Jackson CA-L, 2013,

    The influence of Caledonian structures on Late Jurassic faulting offshore western Norway: new insights from 3D seismic reflection data, STUDENT ORAL PRESENTATION PRIZE WINNER

    , Tectonic Studies Group Annual Meeting
  • Conference paper
    Bell RE, Jackson CA-L, Whipp PS, Clements Bet al., 2013,

    Quantifying the timing and magnitude of fault reactivation in the northern North Sea

    , Tectonic Studies Group Annual Meeting
  • Conference paper
    Bell RE, McNeill LC, Nixon C, Henstock T, Bull J, Christodoulou D, Papatheodorou G, Taylor B, Ferentinos G, Sakellariou D, Lykousis V, Sachpazi M, Ford M, Goodliffe A, Leeder M, Gawthorpe G, Collier R, Clements Bet al., 2013,

    Basin evolution and the distribution of strain within the Gulf of Corinthrift

    , EGU General Assembly
  • Journal article
    Darbyshire FA, Eaton DW, Bastow ID, 2013,

    Seismic imaging of the lithosphere beneath Hudson Bay: Episodic growth of the Laurentian mantle keel

    , Earth and Planetary Science Letters, Vol: 373, Pages: 179-193
  • Journal article
    Jacobs CT, Collins GS, Piggott MD, Kramer SC, Wilson CRGet al., 2013,

    Multiphase flow modelling of volcanic ash particle settling in water using adaptive unstructured meshes

    , Geophysical Journal International, Vol: 192, Pages: 647-665

    Small-scale experiments of volcanic ash particle settling in water have demonstrated that ash particles can either settle slowly and individually, or rapidly and collectively as a gravitationally unstable ash-laden plume. This has important implications for the emplacement of tephra deposits on the seabed. Numerical modelling has the potential to extend the results of laboratory experiments to larger scales and explore the conditions under which plumes may form and persist, but many existing models are computationally restricted by the fixed mesh approaches that they employ. In contrast, this paper presents a new multiphase flow model that uses an adaptive unstructured mesh approach. As a simulation progresses, the mesh is optimized to focus numerical resolution in areas important to the dynamics and decrease it where it is not needed, thereby potentially reducing computational requirements. Model verification is performed using the method of manufactured solutions, which shows the correct solution convergence rates. Model validation and application considers 2-D simulations of plume formation in a water tank which replicate published laboratory experiments. The numerically predicted settling velocities for both individual particles and plumes, as well as instability behaviour, agree well with experimental data and observations. Plume settling is clearly hindered by the presence of a salinity gradient, and its influence must therefore be taken into account when considering particles in bodies of saline water. Furthermore, individual particles settle in the laminar flow regime while plume settling is shown (by plume Reynolds numbers greater than unity) to be in the turbulent flow regime, which has a significant impact on entrainment and settling rates. Mesh adaptivity maintains solution accuracy while providing a substantial reduction in computational requirements when compared to the same simulation performed using a fixed mesh, highlighting the benefits of an adapt

  • Journal article
    Hassan MHA, Johnson HD, Allison PA, Abdullah WHet al., 2013,

    Sedimentology and stratigraphic development of the upper Nyalu Formation (Early Miocence), Sarawak, Malaysia: A mixed wave and tide influenced coastal system

    , Journal of Asian Earth Sciences
  • Journal article
    Hayes-Labruto L, Schillebeeckx SJD, Workman M, Shah Net al., 2013,

    Contrasting Perspectives on China's Rare Earth Policies: Reframing the Debate through a Stakeholder Lens

    , Energy Policy

    This article critically compares China’s rare earth policy with perspectives upheld in the rest of the world (ROW). We introduce rare earth elements and their importance for energy and present how China and the ROW are framing the policy debate. We find strongly dissonant views with regards to motives for foreign direct investment, China’s two-tiered pricing structure and its questionable innovation potential. Using the metaphor of “China Inc.”, we compare the Chinese government to a socially responsible corporation that aims to balance the needs of its internal stakeholders with the demands from a resource-dependent world. We find that China’s internal stakeholders have more power and legitimacy in the REE debate than the ROW and reconceptualise various possible mitigation strategies that could change current international policy and market dynamics. As such, we aim to reframe the perspectives that seem to govern the West and argue in favour of policy formation that explicitly acknowledges China’s triple bottom line ambitions and encourages the ROW to engage with China in a more nuanced manner.

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