Open Research Exeter (ORE)

• On the origin of magnetic fields in stars 

  Wurster, J; Bate, MR; Price, DJ (Oxford University Press (OUP) / Royal Astronomical Society, 2018-09-05)

  Are the kG-strength magnetic fields observed in young stars a fossil field left over from their formation or are they generated by a dynamo? We use radiation non-ideal magnetohydrodynamics simulations of the gravitational ...

• Superdirectivity from arrays of strongly coupled meta-atoms 

  Radkovskaya, A; Kiriushechkina, S; Vakulenko, A; Petrov, P; Solymar, L; Li, L; Vallecchi, A; Stevens, CJ; Shamonina, E (AIP Publishing, 2018-09-10)

  We explore the possibility of achieving superdirectivity in metamaterial-inspired endfire antenna arrays relying on the good services of magnetoinductive waves. These are short-wavelength slow waves propagating by virtue ...

• The geochemistry of modern calcareous barnacle shells and applications for palaeoenvironmental studies 

  Ullmann, CV; Gale, AS; Huggett, J; Wary, D; Frei, R; Korte, C; Broom-Fendley, S; Littler, K; Hesselbo, SP (Elsevier, 2018-09-22)

  Thoracican barnacles of the Superorder Thoracicalcarea Gale, 2016 are sessile calcifiers which are ubiquitous in the intertidal zone and present from very shallow to the deepest marine environments; they also live as ...

• Convection-driven kinematic dynamos with a self-consistent shear flow 

  Currie, LK; Tobias, SM (Taylor & Francis, 2018-09-11)

  It is widely accepted that astrophysical magnetic fields are generated by dynamo action. In many cases, these fields exhibit organisation on a scale larger than that of the underlying turbulent flow (e.g. the 11-year solar ...

• Graphene electronic fibres with touch-sensing and light-emitting functionalities for smart textiles 

  Torres Alonso, E; Rodrigues, D; Khetani, M; Dong-Wook, S; De Sanctis, A; Joulie, H; de Schrijver, I; Baldycheva, A; Alves, H; Neves, AIS; Russo, S; Craciun, M (Nature Research (part of Springer Nature), 2018)

  The true integration of electronics into textiles requires the fabrication of devices directly on the fibre itself using high performance materials that allow seamless incorporation into fabrics. Woven electronics and ...

• Learning-based Network Path Planning for Traffic Engineering 

  Zuo, Y; Wu, Y; Min, G; Cui, L (Elsevier, 2018)

  Recent advances in traffic engineering offer a series of techniques to address the network problems due to the explosive growth of Internet traffic. In traffic engineering, dynamic path planning is essential for prevalent ...

• Landscape Analysis of a Class of NP-Hard Binary Packing Problems 

  Alyahya, KYO; Rowe, J (Massachusetts Institute of Technology Press (MIT Press), 2019)

  This paper presents an exploratory landscape analysis of three NP-hard combinatorial optimisation problems: the number partitioning problem, the binary knapsack problem, and the quadratic binary knapsack problem. In the ...

• A proof of Hadjicostas's conjecture 

  Chapman, R (arXiv, 2004-06-15)

  We prove a recent conjecture of Hadjicostas concerning a double integral formula involving the zeta and the gamma functions.

• Recursions associated to trapezoid, symmetric and rotation symmetric functions over Galois fields 

  Castro, FN; Chapman, R; Medina, LA; Sepúlveda, LB (Elsevier, 2018-04-14)

  Rotation symmetric Boolean functions are invariant under circular translation of indices. These functions have very rich cryptographic properties and have been used in different cryptosystems. Recently, Thomas Cusick proved ...

• On the Learnability of Programming Language Semantics 

  Ghica, DR; Alyahya, K (Interaction and Concurrency Experience, 2017-06)

  Game semantics is a powerful method of semantic analysis for programming languages. It gives mathematically accurate models ("fully abstract") for a wide variety of programming languages. Game semantic models are combinatorial ...

• Estimation of cervical spine internal loads with the use of validated bushing elements for sport collisions. Application in the analysis of head impacts in rugby contact events 

  Silvestros, P; Preatoni, E; Gill, HS; Gheduzzi, S; Hernandez, BA; Holsgrove, TP; Cazzola, D (World Council of Biomechanics, 2018-07)

• Does Large Igneous Province volcanism always perturb the mercury cycle? Comparing the records of Oceanic Anoxic Event and the end-Cretaceous to other Mesozoic events 

  Percival, LME; Jenkyns, HC; Mather, TA; Dickson, AJ; Batenburg, SJ; Ruhl, M; Hesselbo, SP; Barclay, R; Jarvis, I; Robinson, SA; Woelders, L (American Journal of Science, 2018)

  Mercury (Hg) is increasingly being used as a sedimentary tracer of Large Igneous Province (LIP) volcanism, and supports hypotheses of a coincidence between the formation of several LIPs and episodes of mass extinction ...

• On the non-abelian Brumer-Stark conjecture and the equivariant Iwasawa main conjecture 

  Johnston, H; Nickel, A (Springer Verlag, 2018)

  We show that for an odd prime p, the p-primary parts of refinements of the (imprimitive) non-abelian Brumer and Brumer-Stark conjectures are implied by the equivariant Iwasawa main conjecture (EIMC) for totally real fields. ...

• Data-Driven Evolutionary Optimization: An Overview and Case Studies 

  Jin, Y; Wang, H; Chugh, T; Guo, D; Miettinen, K (Institute of Electrical and Electronics Engineers (IEEE), 2018-09-06)

  Most evolutionary optimization algorithms assume that the evaluation of the objective and constraint functions is straightforward. In solving many real-world optimization problems, however, such objective functions may not ...

• Phase-change metadevices for the dynamic and reconfigurable control of light 

  Wright, CD; Carrillo, SGC; de Galarreta, CR; Gemo, E; Trimby, L; Alexeev, AM; Au, YY; Nagareddy, VK; Baldycheva, A; Bertolotti, J; Lopez-Garcia, M; Klemm, M; Cryan, M (Optical Society of America, 2018-07-05)

  The combination of chalcogenide phase-change materials with optical metamaterial arrays is exploited to create new forms of dynamic, tuneable and reconfigurable photonic devices including perfect absorbers, modulators, ...

• Hyperspectral Analysis Applied to Micro-Brillouin Maps of Amyloid-Beta Plaques in Alzheimer’s Brain 

  Palombo, F; Masia, F; Mattana, S; Tamagnini, F; Borri, P; Langbein, W; Fioretto, D (Royal Society of Chemistry, 2018)

  A recent investigation in the architecture and chemical composition of amyloid-β (Aβ) plaques in ex vivo histological sections of an Aβ-overexpressing transgenic mouse hippocampus, has shed light onto the infrared light ...

• Threshold voltage control to improve energy utilization efficiency of a power management circuit for energy harvesting applications 

  Chew, ZJ; Zhu, M (MDPI, 2018)

  This work presents a design approach that improves power management circuit (PMC) for energy harvesting applications so that more of the harvested energy can be utilized by the wireless sensor nodes (WSNs) to perform ...

• Vibration Energy Harvesting Powered Wireless Sensor Network for Structural Health Monitoring 

  Chew, Z; Ruan, T; Somov, A; Zhu, M (Institute of Electrical and Electronics Engineers (IEEE), 2018)

  This work presents a batteryless SmartMesh IP wireless sensor node powered by energy harvesting. A strain energy harvester was subjected to different simulated vibration profiles which can occur in engineering structures ...

• Auxetic structure for increased power output of strain vibration energy harvester (article) 

  Ferguson, WJG; Kuang, Y; Evans, KE; Smith, CW; Zhu, M (Elsevier, 2018-09-08)

  This paper develops an auxetic (negative Poisson’s ratio) piezoelectric energy harvester (APEH) to increase the power output when harnessing strain energy. The APEH consists of a piezoelectric element bonded to an auxetic ...

• Structure of a shear-line polar low 

  Sergeev, DE; Renfrew, IA; Spengler, T; Dorling, SR (Wiley / Royal Meteorological Society, 2017-01-01)

  During March 2013 a series of polar lows originated in a high-vorticity (>10−3s−1) shear zone that was associated with a prolonged marine cold-air outbreak over the Norwegian Sea. A detailed analysis of one shear-line polar ...

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