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Conference paperAldama Bustos G, Stafford PJ, 2012,
On the use of Arias intensity as a lower bound in the hazard integration process of a PSHA
, 15th World Conference on Earthquake Engineering -
Conference paperKumar M, Stafford PJ, Elghazouli AY, 2012,
Assessment of strength demands in moment resisting frames
, 15th World Conference on Earthquake Engineering -
Conference paperFoulser-Piggott R, Stafford PJ, Ochieng WY, 2012,
Quantifying the epistemic uncertainty in ground-motion maps
, 15th World Conference on Earthquake Engineering -
Conference paperDorra EM, Stafford PJ, Elghazouli AY, 2012,
Seismic vulnerability of lifelines in Greater Cairo
, 15th World Conference on Earthquake Engineering -
Conference paperRathje EM, Wang Y, Stafford PJ, et al., 2012,
Probabilistic Assessment of the Performance of Slopes
, 2nd International Conference on Performance Based Design in Earthquake Geotechnical Engineering -
Conference paperGuerreiro P, Kontoe S, Taborda D, 2012,
Comparative study of stiffness reduction and damping curves
, 15th World Conference on Earthquake Engineering -
Conference paperBell RE, Jackson CA-L, Whipp PS, et al., 2012,
Fault evolution during polyphase extension: Horda Platform, North Sea
, Tectonic Studies Group Annual Meeting -
ReportBell RE, Wallace LM, Silver EA, et al., 2012,
Using Ocean Drilling to Unlock the Secrets of Slow Slip Events
, IODP International Workshop report -
Journal articleWallace LM, Silver EA, Bangs N, et al., 2012,
Workshop on Using Ocean Drilling to Unlock the Secrets of Slow Slip Events (Workshop Report)
, Scientific Drilling, Vol: 14, Pages: 64-67 -
Conference paperBell RE, Jackson CA-L, Whipp PS, et al., 2012,
Fault interaction between Permo-Triassic and Mid-Late Jurassic rift episodes in the northern North Sea
, Onshore-Offshore relationships on the North Atlantic Margin -
Journal articlePapaspiliou M, Kontoe S, Bommer JJ, 2012,
An Exploration of Incorporating Site Response into PSHA Part II: Sensitivity of Hazard Estimates to Site Response Approaches
, Soil Dynamics and Earthquake Engineering, Vol: 42, Pages: 316-330This paper examines the sensitivity of seismic hazard analyses to various site response analysis procedures. Site effects are incorporated in the hazard calculations using a probabilistic approach and specifically the methodology of Bazzurro and Cornell [1] for the transformation of a generic ground-motion prediction equation to a site-specific one. The paper explores the sensitivity of the median amplification function, its standard deviation and the resulting surface hazard curve, to different methods of site response analysis and model input parameters. The computed site-specific surface hazard curves are also compared with those obtained from a generic soil ground-motion prediction equation. For the two sites investigated, it is shown that the choice of equivalent linear or nonlinear analysis with different constitutive model parameters has a significant impact on the hazard results. The sandy site was seen to be more sensitive to the site response analysis approach employed than the clayey site.
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Journal articleWhittaker AC, Boulton SJ, 2012,
Tectonic and climatic controls on knickpoint retreat rates and landscape response times
, JOURNAL OF GEOPHYSICAL RESEARCH - EARTH SURFACE, Vol: 117 -
Conference paperBarnes PM, Henrys SA, Mountjoy J, et al., 2012,
Rough-crust subduction, upper plate structure, and variable fault behavior at the northern Hikurangi Margin, New Zealand
, American Geophysical Union, Fall Meeting -
Journal articleWhittaker AC, 2012,
How do landscapes record tectonics and climate?
, LITHOSPHERE, Vol: 4, Pages: 160-164 -
Journal articleParsons A, Whittaker AC, Duller R, et al., 2012,
Late orogenic tectonic and erosional history revealed from the dispersal of fluvial gravels, south-central Pyrenees, Spain
, JOURNAL OF THE GEOLOGICAL SOCIETY, LONDON, Vol: 169, Pages: 111-114 -
Journal articleJackson MD, Butler AP, Vinogradov J, 2012,
Measurements of Spontaneous Potential in Chalk with Application to Aquifer Characterisation in the Southern UK
, Quarterly Journal of Engineering Geology and Hydrogeology -
Journal articleJackson MD, Gulamali MY, Leinov E, et al., 2012,
Spontaneous Potentials in Hydrocarbon Reservoirs during Waterflooding: Application to Waterfront Monitoring
, SPE Journal -
Journal articleSaunders JH, Jackson MD, Pain CC, et al., 2012,
Streaming potentials in hydrocarbon reservoir conditions
, Geophysics, Vol: 77, Pages: E77-E90 -
Journal articleHill J, Piggott MD, Ham DA, et al., 2012,
On the performance of a generic length scale turbulence model within an adaptive finite element ocean model
, Ocean Modelling, Vol: 56, Pages: 1-15Research into the use of unstructured mesh methods for ocean modelling has been growing steadily in the last few years. One advantage of using unstructured meshes is that one can concentrate resolution where it is needed. In addition, dynamic adaptive mesh optimisation (DAMO) strategies allow resolution to be concentrated when this is required. Despite the advantage that DAMO gives in terms of improving the spatial resolution where and when required, small-scale turbulence in the oceans still requires parameterisation. A two-equation, generic length scale (GLS) turbulence model (one equation for turbulent kinetic energy and another for a generic turbulence length-scale quantity) adds this parameterisation and can be used in conjunction with adaptive mesh techniques. In this paper, an implementation of the GLS turbulence parameterisation is detailed in a non-hydrostatic, finite-element, unstructured mesh ocean model, Fluidity-ICOM. The implementation is validated by comparing to both a laboratory-scale experiment and real-world observations, on both fixed and adaptive meshes. The model performs well, matching laboratory and observed data, with resolution being adjusted as necessary by DAMO. Flexibility in the prognostic fields used to construct the error metric used in DAMO is required to ensure best performance. Moreover, the adaptive mesh models perform as well as fixed mesh models in terms of root mean square error to observation or theoretical mixed layer depths, but uses fewer elements and hence has a reduced computational cost.
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Journal articleBray VJ, Schenk PM, Melosh HJ, et al., 2012,
Ganymede crater dimensions – Implications for central peak and central pit formation and development
, Icarus, Vol: 217, Pages: 115-129The morphology of impact craters on the icy Galilean satellites differs from craters on rocky bodies. Thedifferences are thought due to the relative weakness of ice and the possible presence of sub-surface waterlayers. Digital elevation models constructed from Galileo images were used to measure a range of dimensionsof craters on the dark and bright terrains of Ganymede. Measurements were made from multipleprofiles across each crater, so that natural variation in crater dimensions could be assessed and averagedscaling trends constructed. The additional depth, slope and volume information reported in this work hasenabled study of central peak formation and development, and allowed a quantitative assessment of thevarious theories for central pit formation. We note a possible difference in the size-morphology progressionbetween small craters on icy and silicate bodies, where central peaks occur in small craters beforethere is any slumping of the crater rim, which is the opposite to the observed sequence on the Moon. Conversely,our crater dimension analyses suggest that the size-morphology progression of large lunar cratersfrom central peak to peak-ring is mirrored on Ganymede, but that the peak-ring is subsequentlymodified to a central pit morphology. Pit formation may occur via the collapse of surface material intoa void left by the gradual release of impact-induced volatiles or the drainage of impact melt intosub-crater fractures.
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