Open Research Exeter (ORE)

• Coupled modelling of a non-linear wave energy converter and hydraulic PTO 

  Worden Hodge, C; Bateman, W; Yuan, Z; Thies, PR; Bruce, T (International Society of Offshore and Polar Engineers, 2018)

  The mechanical motion of a wave energy converter (WEC) is converted by the power take-off (PTO) system into electricity, but these two systems are not independent, as they have been treated in WEC modelling. Treating them ...

• Investigation of thermal and electrical performances of a combined semi-transparent PV-vacuum glazing 

  Ghosh, A; Sundaram, S; Mallick, TK (Elsevier, 2018-07-18)

  Combined semi-transparent PV-vacuum glazing provides low overall heat transfer coefficient, reduces solar heat gain, generates clean electricity and admits comfortable daylight. In this work, thermal and electrical ...

• Sources of risk and uncertainty in UK smart grid deployment: an expert stakeholder analysis 

  Connor, PM; Axon, C; Xenias, D; Balta-Ozkan, N (Elsevier, 2018-07-19)

  The shift to increasingly smarter grids will require preparation and planning on the part of a diverse selection of current and future stakeholders. There are substantive sources of uncertainty that will impact on the ...

• Chaos in Kuramoto Oscillator Networks 

  Bick, C; Panaggio, MJ; Martens, EA (AIP Publishing, 2018)

  Kuramoto oscillators are widely used to explain collective phenomena in networks of coupled oscillatory units. We show that simple networks of two populations with a generic coupling scheme can exhibit chaotic dynamics as ...

• Enhanced sparse component analysis for operational modal identification of real-life bridge structures 

  Xu, Y; Brownjohn, JMW; Hester, D (Elsevier, 2018)

  Blind source separation receives increasing attention as an alternative tool for operational modal analysis in civil applications. However, the implementations on real-life structures in literature are rare, especially in ...

• Reliable, Resilient and Sustainable Urban Drainage Systems: an Analysis of Robustness under Deep Uncertainty 

  Casal-Campos, A; Sadr, S; Fu, G; Butler, D (American Chemical Society, 2018-07-16)

  Reliability, resilience and sustainability are key goals of any urban drainage system. However, only a few studies have recently focused on measuring, operationalizing and comparing such concepts in a world of deep ...

• Simulation of an evolving convective boundary layer using a scale-dependent dynamic Smagorinsky model at near grey-zone resolutions. 

  Efstathiou, G; Plant, R; Bopape, M-J (American Meteorological Society, 2018-07-17)

  A scale-dependent Lagrangian-averaged Dynamic Smagorinsky sub-grid scheme with stratification effects is used to simulate the evolving convective boundary layer of the Wangara case study in the grey-zone regime ...

• Study protocol for the 'HelpMeDoIt!' randomised controlled feasibility trial: an app, web and social support-based weight loss intervention for adults with obesity. 

  Matthews, L; Pugmire, J; Moore, L; Kelson, M; McConnachie, A; McIntosh, E; Morgan-Trimmer, S; Murphy, S; Hughes, K; Coulman, E; Utkina-Macaskill, O; Simpson, SA (BMJ Publishing Group, 2017-10-25)

  INTRODUCTION: HelpMeDoIt! will test the feasibility of an innovative weight loss intervention using a smartphone app and website. Goal setting, self-monitoring and social support are three key facilitators of behaviour ...

• A Lagrangian vertical coordinate version of the ENDGame dynamical core. Part II: Evaluation of Lagrangian conservation properties. 

  Kavcic, I; Thuburn, J (Wiley, 2018-07-08)

  A baroclinic instability test case is used to compare the Lagrangian conservation properties of three versions of a semi‐implicit semi‐Lagrangian dynamical core: one using a height based vertical coordinate and two using ...

• Parameter estimation for synthetic rope models 

  Weller, SD; Banfield, SJ; Canedo, J (ASME, 2018-06-17)

  With widespread market penetration in the offshore sector, synthetic rope materials offer a range of axial compliance that can be exploited for mooring design, ranging from stiff (e.g. high modulus polyethylene) to soft ...

• Visualisation with treemaps and sunbursts in evolutionary many-objective optimisation 

  Walker, DJ (Springer Verlag, 2018)

  Visualisation is an important aspect of evolutionary computation, enabling practitioners to explore the operation of their algorithms in an intuitive way and providing a better means for displaying their results to problem ...

• A Broadband Stripline Technique for Characterizing Relative Permittivity and Permeability (dataset) 

  Gallagher, Cameron Patrick; Cole, Nick; Savage, Peter P.; McKeever, Conor; Sambles, J. R.; Hibbins, Alastair P. (University of Exeter, 2018-07-11)

  We present a stripline design and calibration method allowing the extraction of relative permittivity of single dielectric samples in the 200 MHz – 50 GHz range. The simultaneous extraction of relative permittivity and ...

• On the internal signature and minimal electric network realizations of reciprocal behaviors 

  Hughes, TH (Elsevier, 2018-07-18)

  In a recent paper, it was shown that (i) any reciprocal system with a proper transfer function possesses a signature-symmetric realization in which each state has either even or odd parity; and (ii) any reciprocal and ...

• Multivariate analysis of the reliability, availability, and maintainability characterizations of a Spar–Buoy wave energy converter farm 

  Rinaldi, G; Portillo, JCC; Khalid, F; Henriques, JCC; Thies, PR; Gato, LMC; Johanning, L (Springer International Publishing, 2018-06-29)

  Quantitative reliability, availability, and maintainability (RAM) assessments are of fundamental importance at the early design stages, as well as planning and operation of marine renewable energy systems. This paper ...

• A generalised equivalent storm model for long-term statistics of ocean waves 

  Mackay, E; Johanning, L (Elsevier, 2018-07-06)

  To calculate the return periods of individual wave or crest heights, the long-term distribution of sea states must be combined with the short-term distribution of individual wave or crest heights conditional on sea state. ...

• A Lagrangian vertical coordinate version of the ENDGame dynamical core. Part I: Formulation, remapping strategies, and robustness 

  Kavcic, I; Thuburn, J (Wiley, 2018-06-26)

  Previous work provides evidence that Lagrangian conservation and related properties of a numerical model dynamical core can be improved by the use of a Lagrangian or quasi-Lagrangian vertical coordinate (LVC). Most previous ...

• The acoustic phase resonances and surface waves supported by a compound rigid grating 

  Beadle, J; Starkey, T; Dockrey, J; Sambles, JR; Hibbins, A (Nature Publishing Group, 2018-07-16)

  We study the radiative and bound acoustic modes supported by a rigid grating formed of three samedepth, narrow grooves per unit cell. One of the grooves is twice the width of the other two, forming a ‘compound’ grating. ...

• Enhanced photoactivity and hydrogen generation of LaFeO 3 photocathode by plasmonic silver nanoparticle incorporation 

  Pawar, GS; Elikkottil, A; Seetha, S; Reddy, S; Pesala, B; Tahir, AA; Mallick, TK (American Chemical Society, 2018-06-15)

  A plasmonic LaFeO3-Ag (LFO-Ag) photocathode was synthesised by incorporating Ag nanoparticles to excite surface plasmon resonances (SPR) for enhanced light harvesting to drive photoelectrochemical (PEC) hydrogen evolution. ...

• Comparing frequency and time-domain simulations for geometry optimization of a floating offshore wind turbine mooring system 

  Pillai, AC; Thies, PR; Johanning, L (American Society of Mechanical Engineers (ASME), 2018-11)

  This paper explores geometry optimization of an offshore wind turbine’s mooring system considering the minimization of the material cost and the cumulative fatigue damage. A comparison of time domain simulations against ...

• A new method to objectively classify extratropical cyclones for climate studies: Testing in the Southwest Pacific region 

  Catto, JL (American Meteorological Society, 2018-05-18)

  Extratropical cyclones can vary widely in their configuration during cyclogenesis, development mechanisms, spatial and temporal characteristics, and impacts. An automated method to classify extratropical cyclones identified ...

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