Recent Submissions

  • Global and local tests to assess stationarity of Markov transition models 

    Rodrigues de Lara, Idemauro Antonio; Hinde, John; Taconeli, Cesar Augusto (Taylor & Francis, 2018-02-09)
    We present global and local likelihood-based tests to evaluate stationarity in transition models. Three motivational studies are considered. A simulation study was carried out to assess the performance of the proposed ...
  • A Weibull-count approach for handling under- and overdispersed longitudinal/clustered data structures 

    Luyts, Martial; Molenberghs, Geert; Verbeke, Geert; Matthijs, Koen; Ribeiro Jr, Eduardo E.; Demétrio, Clarice G. B.; Hinde, John (SAGE Publications, 2018-07-30)
    A Weibull-model-based approach is examined to handle under- and overdispersed discrete data in a hierarchical framework. This methodology was first introduced by Nakagawa and Osaki (1975, IEEE Transactions on Reliability, ...
  • Simulation of quantum circuits by low-rank stabilizer decompositions 

    Bravyi, Sergey; Browne, Dan; Calpin, Padraic; Campbell, Earl; Gosset, David; Howard, Mark (Verein zur Förderung des Open Access Publizierens in den Quantenwissenschaften, 2019-09-02)
    Recent work has explored using the stabilizer formalism to classically simulate quantum circuits containing a few non-Clifford gates. The computational cost of such methods is directly related to the notion of s t a ...
  • Prescribing patterns in growing tubular soft matter by initial residual stress 

    Du, Yangkun; Lü, Chaofeng; Liu, Congshan; Han, Zilong; Li, Jian; Chen, Weiqiu; Qu, Shaoxing; Destrade, Michel (Royal Society of Chemistry, 2019-10-02)
    Initial residual stress is omnipresent in biological tissues and soft matter, and can affect growth-induced pattern selection significantly. Here we demonstrate this effect experimentally by letting soft tubes grow in the ...
  • Generalization of the Zabolotskaya equation to all incompressible isotropic elastic solids 

    Destrade, Michel; Pucci, Edvige; Saccomandi, Giuseppe (The Royal Society, 2019-07-03)
    We study elastic shear waves of small but finite amplitude, composed of an anti-plane shear motion and a general in-plane motion. We use a multiple scales expansion to derive an asymptotic system of coupled nonlinear ...
  • Multi-sector approximation method for arteries: the residual stresses of circumferential rings with non-trivial openings 

    Sigaeva, Taisiya; Destrade, Michel; Di Martino, Elena S. (The Royal Society, 2019-07-24)
    The opening angle method is a popular choice in biomechanics to estimate residual stresses in arteries. Experimentally, it means that an artery is cut into rings; then the rings are cut axially or radially allowing them ...
  • Poynting effect of brain matter in torsion 

    Balbi, Valentina; Trotta, Antonia; Destrade, Michel; Annaidh, Aisling Ni (Royal Society of Chemistry, 2019-06-13)
    We investigate experimentally and model theoretically the mechanical behaviour of brain matter in torsion. Using a strain-controlled rheometer, we perform torsion tests on fresh porcine brain samples. We quantify the torque ...
  • Influence of initial residual stress on growth and pattern creation for a layered aorta 

    Du, Yangkun; Lü, Chaofeng; Destrade, Michel; Chen, Weiqiu (Nature Research, 2019-06-03)
    Residual stress is ubiquitous and indispensable in most biological and artificial materials, where it sustains and optimizes many biological and functional mechanisms. The theory of volume growth, starting from a stress-free ...
  • Rivlin's legacy in continuum mechanics and applied mathematics 

    Destrade, Michel; Murphy, Jeremiah; Saccomandi, Giuseppe (The Royal Society, 2019-03-18)
    Over a long and distinguished career, Ronald Rivlin (figure 1) published more than 200 scientific papers. He was a highly innovative scientist who made seminal contributions in all areas of continuum mechanics. He was one ...
  • Tuning the pull-in instability of soft dielectric elastomers through loading protocols 

    Su, Y.P.; Chen, W.Q.; Destrade, Michel (Elsevier, 2019-03-22)
    Pull-in (or electro-mechanical) instability occurs when a drastic decrease in the thickness of a dielectric elastomer results in electrical breakdown, which limits the applications of dielectric devices. Here we derive the ...
  • Wrinkles in soft dielectric plates 

    Su, Yipin; Conroy Broderick, Hannah; Chen, Weiqiu; Destrade, Michel (Elsevier, 2018-07-04)
    We show that a smooth giant voltage actuation of soft dielectric plates is not easily obtained in practice. In principle one can exploit, through pre-deformation, the snap-through behavior of their loading curve to deliver ...
  • Fine tuning the electro-mechanical response of dielectric elastomers 

    Zurlo, Giuseppe; Destrade, Michel; Lu, Tongqing (AIP Publishing, 2018-10-16)
    We propose a protocol to model accurately the electromechanical behavior of dielectric elastomer membranes using experimental data of stress-stretch and voltage-stretch tests. We show how the relationship between electric ...
  • Effects of nerve bundle geometry on neurotrauma evaluation 

    Cinelli, Ilaria; Destrade, Michel; McHugh, Peter; Duffy, Maeve (Wiley, 2018-06-16)
    ObjectiveWe confirm that alteration of a neuron structure can induce abnormalities in signal propagation for nervous systems, as observed in brain damage. Here, we investigate the effects of geometrical changes and damage ...
  • Finite bending and pattern evolution of the associated instability for a dielectric elastomer slab 

    Su, Yipin; Wu, Bin; Chen, Weiqiu; Destrade, Michel (Elsevier, 2018-09-21)
    We investigate the finite bending and the associated bending instability of an incompressible dielectric slab subject to a combination of applied voltage and axial compression, using nonlinear electro-elasticity theory and ...
  • Genus two partition and correlation functions for fermionic vertex operator superalgebras II 

    Tuite, Michael P.; Zuevsky, Alexander (2018-10-18)
    We define and compute the continuous orbifold partition function and a generating function for all n-point correlation functions for the rank two free fermion vertex operator superalgebra on a genus two Riemann surface ...
  • Genus two zhu theory for vertex operator algebras 

    Tuite, Michael P.; Gilroy, Thomas (2016-10-27)
    We consider correlation functions for a vertex operator algebra on a genus two Riemann surface formed by sewing two tori together. We describe a generalisation of genus one Zhu recursion where we express an arbitrary genus ...
  • N=2 and N=4 subalgebras of super vertex operator algebras 

    Tuite, Michael P.; Mason, Geoffrey; Yamskulna, Gaywalee (IOP Publishing, 2018-01-10)
    We develop criteria to decide if an N=2 or N=4 super conformal algebra is a subalgebra of a super vertex operator algebra in general, and of a super lattice theory in particular. We give some specific examples.
  • Zhu reduction for Jacobi n-point functions and applications 

    Tuite, Michael P.; Krauel, Matthew; Bringmann, Kathrin (2017-06-23)
    We establish precise Zhu reduction formulas for Jacobi n-point functions which show the absence of any possible poles arising in these formulas. We then exploit this to produce results concerning the structure of strongly ...
  • Genus two virasoro correlation functions for vertex operator algebras 

    Tuite, Michael P.; Gilroy, Thomas (2016-12-06)
    We consider all genus two correlation functions for the Virasoro vacuum descendants of a vertex operator algebra. These are described in terms of explicit generating functions that can be combinatorially expressed in terms ...
  • Vertex algebras according to Isaac Newton 

    Tuite, Michael P. (IOP Publishing, 2017-09-08)
    We give an introduction to vertex algebras using elementary forward difference methods originally due to Isaac Newton.

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