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  • Journal article
    Sgobba S, Stafford PJ, Marano GC, 2011,

    A Seismologically Consistent Husid Envelope Function for the Stochastic Simulation of Earthquake Ground-Motions

    , COMPUTATIONAL METHODS IN STOCHASTIC DYNAMICS, Vol: 22, Pages: 229-246
  • Journal article
    Fang F, Pain CC, Navon IM, Gorman GJ, Piggott MD, Allison PAet al., 2011,

    The independent set perturbation adjoint method: A new method of differentiating mesh-based fluids models

    , International Journal for Numerical Methods in Fluids, Vol: In review
  • Journal article
    Sookhak Lari K, van Reeuwijk M, Maksimovic C, 2011,

    Combined bulk and wall reactions in turbulent pipe flow: decay coefficients and concentration profiles

    , J HYDROINF, Vol: 13, Pages: 324-333
  • Journal article
    Kumar M, Castro JM, Stafford PJ, Elghazouli AYet al., 2011,

    Influence of mean period ofground motion on the dynamic response of single and multi degree of freedom systems

    , Earthquake Engineering & Structural Dynamics, Vol: 3, Pages: 237-276
  • Journal article
    Mitchell AJ, Allison PA, Gorman GJ, Piggott MD, Pain CCet al., 2011,

    Tidal circulation in an ancient epicontinental sea: The Early Jurassic Laurasian Seaway

    , Geology, Vol: 39, Pages: 207-210, ISSN: 0091-7613
  • Journal article
    Kontoe S, Zdravkovic L, Potts DM, Menkiti COet al., 2011,

    On the relative merits of simple and advanced constitutive models in dynamic analysis of tunnels

    , Geotechnique, Vol: 61, Pages: 815-829, ISSN: 0016-8505

    This paper compares simple constitutive models that are widely used in engineering practice with more sophisticated methods in the context of a case study. In particular, four constitutive modelling approaches have been considered: a simple elasto-plastic constitutive model (modified Cam-clay), with and without Rayleigh damping; the same model coupled with a cyclic non-linear model that can simulate pre-yield hysteresis; and finally an advanced kinematic hardening model, which is an improved version of the Al-Tabbaa & Wood two-surface model. These four approaches are used to analyse the seismic response of a section of the Bolu tunnels during the 1999 Duzce earthquake. To shed light on the performance of the constitutive models, simple site response finite-element analyses were first undertaken for the studied site, paying particular attention to the calibration of the Rayleigh damping parameters. The results of these analyses, in terms of maximum shear strain, were then used as input to an analytical elastic method (extended Hoeg method) for calculating the thrust and bending moment acting in the tunnel lining. Finally the results of dynamic time domain plane-strain analyses, employing the four adopted constitutive modelling approaches, are compared against field observations and results obtained by the extended Hoeg method, to investigate the ability of the models, of ranging complexity, to mimic soil response under seismic excitation.
  • Journal article
    Haselwimmer CE, Riley TR, Liu JG, 2011,

    Lithologic mapping in the Oscar II Coast area, Graham Land, Antarctic Peninsula using ASTER data

    , INTERNATIONAL JOURNAL OF REMOTE SENSING, Vol: 32, Pages: 2013-2035, ISSN: 0143-1161
  • Journal article
    Farrell PE, Piggott MD, Gorman GJ, Ham DA, Wilson CR, Bond TMet al., 2011,

    Automated continuous verification for numerical simulation

    , Geoscientific Model Development, Vol: 4, Pages: 435-449
  • Journal article
    Bishop CA, Liu JG, Mason PJ, 2011,

    Hyperspectral remote sensing for mineral exploration in Pulang, Yunnan Province, China

    , INTERNATIONAL JOURNAL OF REMOTE SENSING, Vol: 32, Pages: 2409-2426, ISSN: 0143-1161
  • Journal article
    Foulser-Piggot R, Stafford PJ, 2011,

    A predictive model for Arias intensity at multiple sites and consideration of spatial correlations

    , Earthquake Engineering & Structural Dynamics
  • Journal article
    Sgobba S, Stafford PJ, Marano GC, Guaragnella Cet al., 2011,

    An evolutionary stochastic ground-motion model defined by a seismological scenario and local site conditions

    , Soil Dynamics and Earthquake Engineering
  • Journal article
    Morgan JV, Warner MR, Collins GS, Grieve RAF, Christeson GL, Gulick SPS, Barton PJet al., 2011,

    Full waveform tomographic images of the peak ring at the Chicxulub impact crater

    , Journal of Geophysical Research, Vol: 116

    Peak rings are a feature of large impact craters on the terrestrial planets and are generally believed to be formed from deeply buried rocks that are uplifted during crater formation. The precise lithology and kinematics of peak ring formation, however, remains unclear. Previous work has revealed a suite of bright inward-dipping reflectors beneath the peak ring at the Chicxulub impact crater and that the peak ring was formed from rocks with a relatively low seismic velocity. New 2D full-waveform tomographic velocity images show that the uppermost lithology of the peak ring is formed from a thin (~100-200 m thick) layer of low-velocity (~3000-3200 m/s) rocks. This low-velocity layer is most likely to be composed of highly porous, allogenic impact breccias. Our models also show that the change in velocity between lithologies within and outside the peak ring is more abrupt than previously realized and occurs close to the location of the dipping reflectors. Across the peak ring, velocity appears to correlate well with predicted shock pressures from a dynamic model of crater formation, where the rocks that form the peak ring originate from uplifted basement that has been subjected to high shock pressures (10-50 GPa), and lie above downthrown sedimentary rocks that have been subjected to shock pressures of < 5 GPa. These observations suggest that low-velocities within the peak ring may be related to shock effects and that the dipping reflectors underneath the peak ring might represent the boundary between highly-shocked basement and weakly-shocked sediments.
  • Journal article
    Gowen RA, Smith A, Fortes AD, Barber S, Brown P, Church P, Collinson G, Coates AJ, Collins G, Crawford IA, Dehant V, Chela-Flores J, Griffiths AD, Grindrod PM, Gurvitis LI, Hagermann A, Hussmann H, Jaumann R, Jones AP, Joy KH, Karatekin O, Miljkovic K, Palomba E, Pike WT, Prieto-Ballesteros O, Raulin F, Sephton MA, Sheridan S, Sims M, Storrie-Lombardi MC, Ambrosi R, Fielding J, Fraser G, Gao Y, Jones GH, Kargl G, Karl WJ, Macagnano A, Mukherjee A, Muller JP, Phipps A, Pullan D, Richter L, Sohl F, Snape J, Sykes J, Wells Net al., 2011,

    Penetrators for in situ subsurface investigations of Europa

    , ADV SPACE RES, Vol: 48, Pages: 725-742, ISSN: 0273-1177

    We present the scientific case for inclusion of penetrators into the Europan surface, and the candidate instruments which could significantly enhance the scientific return of the joint ESA/NASA Europa-Jupiter System Mission (EJSM). Moreover, a surface element would provide an exciting and inspirational mission highlight which would encourage public and political support for the mission.Whilst many of the EJSM science goals can be achieved from the proposed orbital platform, only surface elements can provide key exploration capabilities including direct chemical sampling and associated astrobiological material detection, and sensitive habitability determination. A targeted landing site of upwelled material could provide access to potential biological material originating from deep beneath the ice.Penetrators can also enable more capable geophysical investigations of Europa (and Ganymede) interior body structures, mineralogy, mechanical, magnetic, electrical and thermal properties. They would provide ground truth, not just for the orbital observations of Europa, but could also improve confidence of interpretation of observations of the other Jovian moons. Additionally, penetrators on both Europa and Ganymede, would allow valuable comparison of these worlds, and gather significant information relevant to future landed missions. The advocated low mass penetrators also offer a comparatively low cost method of achieving these important science goals.A payload of two penetrators is proposed to provide redundancy, and improve scientific return, including enhanced networked seismometer performance and diversity of sampled regions.We also describe the associated candidate instruments, penetrator system architecture, and technical challenges for such penetrators, and include their current status and future development plans.
  • Journal article
    Maddison JR, Marshall DP, Pain CC, Piggott MDet al., 2011,

    Accurate representation of geostrophic and hydrostatic balance in unstructured mesh finite element ocean modelling

    , OCEAN MODELLING, Vol: 39, Pages: 248-261, ISSN: 1463-5003
  • Journal article
    Whitchurch AL, Carter A, Sinclair HD, Duller RA, Whittaker AC, Allen PAet al., 2011,

    Sediment routing system evolution within a diachronously uplifting orogen: Insights from detrial zircon thermochronological analyses from the South-Central Pyrenees

    , AMERICAN JOURNAL OF SCIENCE, Vol: 311, Pages: 442-482
  • Journal article
    Funke SW, Pain CC, Kramer SC, Piggott MDet al., 2011,

    A wetting and drying algorithm with a combined pressure/free-surface formulation for non-hydrostatic models

    , Advances in Water Resources
  • Conference paper
    van Reeuwijk M, Hunt GR, Jonker HJJ, 2011,

    Direct simulation of turbulent entrainment due to a plume impinging on a density interface
  • Journal article
    Vinogradov J, 2011,

    Multiphase streaming potential in sandstones saturated with gas/brine and oil/brine during drainage and imbibition

    , Geophysical Research Letters
  • Conference paper
    Wu M-C, Liu JG, 2011,

    ADAPTIVE LOCAL KRIGING (ALK) TO RETRIEVE THE SLANT RANGE SURFACE MOTION MAPS OF WENCHUAN EARTHQUAKE

    , IEEE International Geoscience and Remote Sensing Symposium (IGARSS), Publisher: IEEE, Pages: 1183-1186, ISSN: 2153-6996
  • Journal article
    Bell RE, McNeill LM, Henstock T, Bull JMet al., 2011,

    Comparing extension on multiple time and depth scales in the Corinth Rift, Central Greece

    , Geophysical Journal International, Vol: 186, Pages: 463-470

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