All Outputs (205)

A New Weighted Rank Coefficient of Concordance. (2014)
Journal Article
Coolen-Maturi, T. (2014). A New Weighted Rank Coefficient of Concordance. Journal of Applied Statistics, 41(8), 1721-1745. https://doi.org/10.1080/02664763.2014.889664

There are many situations where n objects are ranked by b>2 independent sources or observers and in which the interest is focused on agreement on the top rankings. Kendall's coefficient of concordance [10 M. Kendall and B. Smith, The problem of m ran... Read More about A New Weighted Rank Coefficient of Concordance..

High-energy elastic and diffractive cross sections (2014)
Journal Article
Khoze, V., Martin, A., & Ryskin, M. (2014). High-energy elastic and diffractive cross sections. The European Physical Journal C, 74(2), Article 2756. https://doi.org/10.1140/epjc/s10052-014-2756-z

We present a ‘global’ description of the wide variety of high-energy elastic and diffractive data that are presently available, particularly from the LHC experiments. The model is based on only one pomeron pole, but it includes multi-pomeron interact... Read More about High-energy elastic and diffractive cross sections.

Effects of memory on spatial heterogeneity in neutrally transmitted culture (2014)
Journal Article
Bentley, R., Caiado, C., & Ormerod, P. (2014). Effects of memory on spatial heterogeneity in neutrally transmitted culture. Evolution and Human Behavior, 35(4), 257-263. https://doi.org/10.1016/j.evolhumbehav.2014.02.001

We explore how cultural heterogeneity evolves without strong selection pressure or environmental differences between groups. Using a neutral transmission model with an isolation-by-distance spatiality, we test the effect of a simple representation of... Read More about Effects of memory on spatial heterogeneity in neutrally transmitted culture.

Extending the non-singular hyperscaling violating spacetimes (2014)
Journal Article
Lei, Y., & Ross, S. F. (2014). Extending the non-singular hyperscaling violating spacetimes. Classical and Quantum Gravity, 31(3), Article 035007. https://doi.org/10.1088/0264-9381/31/3/035007

Lifshitz and hyperscaling violating geometries, which provide a holographic description of non-relativistic field theories, generically have a singularity in the infrared region of the geometry, where tidal forces for freely falling observers diverge... Read More about Extending the non-singular hyperscaling violating spacetimes.

A K3 sigma model with Z_2^8:M_20 symmetry (2014)
Journal Article
Gaberdiel, M., Taormina, A., Volpato, R., & Wendland, K. (2014). A K3 sigma model with Z_2^8:M_20 symmetry. Journal of High Energy Physics, 2014(2), Article 22. https://doi.org/10.1007/jhep02%282014%29022

The K3 sigma model based on the Z2-orbifold of the D4-torus theory is studied. It is shown that it has an equivalent description in terms of twelve free Majorana fermions, or as a rational conformal field theory based on the affine algebra b su(2)6.... Read More about A K3 sigma model with Z_2^8:M_20 symmetry.

Galaxy Formation: Bayesian History Matching for the Observable Universe (2014)
Journal Article
Vernon, I., Goldstein, M., & Bower, R. (2014). Galaxy Formation: Bayesian History Matching for the Observable Universe. Statistical Science, 29(1), 81-90. https://doi.org/10.1214/12-sts412

Cosmologists at the Institute of Computational Cosmology, Durham University, have developed a state of the art model of galaxy formation known as Galform, intended to contribute to our understanding of the formation, growth and subsequent evolution o... Read More about Galaxy Formation: Bayesian History Matching for the Observable Universe.

Pseudo-Orbit Data Assimilation. Part I: The Perfect Model Scenario (2014)
Journal Article
Du, H., & Smith, L. A. (2014). Pseudo-Orbit Data Assimilation. Part I: The Perfect Model Scenario. Journal of the Atmospheric Sciences, 71(2), 469-482. https://doi.org/10.1175/jas-d-13-032.1

State estimation lies at the heart of many meteorological tasks. Pseudo-orbit-based data assimilation provides an attractive alternative approach to data assimilation in nonlinear systems such as weather forecasting models. In the perfect model scena... Read More about Pseudo-Orbit Data Assimilation. Part I: The Perfect Model Scenario.

Pseudo-Orbit Data Assimilation. Part II: Assimilation with Imperfect Models (2014)
Journal Article
Du, H., & Smith, L. A. (2014). Pseudo-Orbit Data Assimilation. Part II: Assimilation with Imperfect Models. Journal of the Atmospheric Sciences, 71(2), 483-495. https://doi.org/10.1175/jas-d-13-033.1

Data assimilation and state estimation for nonlinear models is a challenging task mathematically. Performing this task in real time, as in operational weather forecasting, is even more challenging as the models are imperfect: the mathematical system... Read More about Pseudo-Orbit Data Assimilation. Part II: Assimilation with Imperfect Models.

From d logs to dilogs; the super Yang-Mills MHV amplitude revisited (2014)
Journal Article
Lipstein, A. E., & Mason, L. (2014). From d logs to dilogs; the super Yang-Mills MHV amplitude revisited. Journal of High Energy Physics, 2014(01), Article 169. https://doi.org/10.1007/jhep01%282014%29169

Recently, loop integrands for certain Yang-Mills scattering amplitudes and correlation functions have been shown to be systematically expressible in dlog form, raising the possibility that these loop integrals can be performed directly without Feynma... Read More about From d logs to dilogs; the super Yang-Mills MHV amplitude revisited.

Nonparametric predictive inference for combined competing risks data (2014)
Journal Article
Coolen-Maturi, T., & Coolen, F. (2014). Nonparametric predictive inference for combined competing risks data. Reliability Engineering & System Safety, 126, 87-97. https://doi.org/10.1016/j.ress.2014.01.007

The nonparametric predictive inference (NPI) approach for competing risks data has recently been presented, in particular addressing the question due to which of the competing risks the next unit will fail, and also considering the effects of unobser... Read More about Nonparametric predictive inference for combined competing risks data.

Broken planar Skyrmions — statics and dynamics (2014)
Journal Article
Jennings, P., & Winyard, T. (2014). Broken planar Skyrmions — statics and dynamics. Journal of High Energy Physics, 2014(1), https://doi.org/10.1007/jhep01%282014%29122

The broken planar Skyrme model is a theory that breaks global O (3) symmetry to the dihedral group D N . It has been shown that the single soliton solution is formed of N constituent parts, named partons, that are topologically confined. The multisol... Read More about Broken planar Skyrmions — statics and dynamics.

Holographic entanglement and causal information in coherent states (2014)
Journal Article
Gentle, S. A., & Rangamani, M. (2014). Holographic entanglement and causal information in coherent states. Journal of High Energy Physics, 2014(1), https://doi.org/10.1007/jhep01%282014%29120

Scalar solitons in global AdS4 are holographically dual to coherent states carrying a non-trivial condensate of a scalar operator. We study the holographic information content of these states, focusing on a particular spatial region, by examining the... Read More about Holographic entanglement and causal information in coherent states.

The Spectrum of Light States in Large N Minimal Models (2014)
Journal Article
Gaberdiel, M., Gopakumar, R., & Rangamani, M. (2014). The Spectrum of Light States in Large N Minimal Models. Journal of High Energy Physics, 2014(1), https://doi.org/10.1007/jhep01%282014%29116

WN,k minimal models possess an interesting class of ‘light’ primaries which control much of the low energy density of states in the large N ’t Hooft limit. In this paper we conduct a detailed exploration of their distribution using a combination of n... Read More about The Spectrum of Light States in Large N Minimal Models.

Practical statistical methods for call centres with a case study addressing urgent medical care delivery (2014)
Journal Article
Wooff, D., & Stirling, S. (2015). Practical statistical methods for call centres with a case study addressing urgent medical care delivery. Annals of Operations Research, 233(1), 501-515. https://doi.org/10.1007/s10479-014-1529-2

Our interest is in forecasting for call centres, and in particular out-of-hours call centres (OOHCC) which deal with patient requests for medical advice outside normal working hours. Planning needs accurate forecasts of incoming call volumes. These v... Read More about Practical statistical methods for call centres with a case study addressing urgent medical care delivery.

The Sakai-Sugimoto soliton (2014)
Journal Article
Bolognesi, S., & Sutcliffe, P. (2014). The Sakai-Sugimoto soliton. Journal of High Energy Physics, 2014(1), Article 78. https://doi.org/10.1007/jhep01%282014%29078

The Sakai-Sugimoto model is the preeminent example of a string theory de- scription of holographic QCD, in which baryons correspond to topological solitons in the bulk. Here we investigate the validity of various approximations of the Sakai-Sugimoto... Read More about The Sakai-Sugimoto soliton.

Numerical and analytical tests of quasi-integrability in modified Sine-Gordon models (2014)
Journal Article
Ferreira, L., & Zakrzewski, W. (2014). Numerical and analytical tests of quasi-integrability in modified Sine-Gordon models. Journal of High Energy Physics, 2014(1), Article 058. https://doi.org/10.1007/jhep01%282014%29058

Following our attempts to define quasi-integrability in which we related this concept to a particular symmetry of the two-soliton function we check this condition in three classes of modified sine-Gordon models in (1 + 1) dimensions. We find that the... Read More about Numerical and analytical tests of quasi-integrability in modified Sine-Gordon models.

Monte Carlo Simulation of Geminate Pair Recombination Dynamics in Organic Photovoltaic Devices: Multi-Exponential, Field-Dependent Kinetics and Its Interpretation (2014)
Journal Article
Jones, L., Chakrabarti, B., & Groves, C. (2014). Monte Carlo Simulation of Geminate Pair Recombination Dynamics in Organic Photovoltaic Devices: Multi-Exponential, Field-Dependent Kinetics and Its Interpretation. Journal of Physical Chemistry C, 118(1), 85-91. https://doi.org/10.1021/jp408063f

Monte Carlo simulations are used to examine charge-transfer (CT) state recombination dynamics considering the effects of energetic disorder and bulk heterojunction morphology. Strongly biexponential recombination kinetics were observed, in agreement... Read More about Monte Carlo Simulation of Geminate Pair Recombination Dynamics in Organic Photovoltaic Devices: Multi-Exponential, Field-Dependent Kinetics and Its Interpretation.

Platonic hyperbolic monopoles (2014)
Journal Article
Manton, N., & Sutcliffe, P. (2014). Platonic hyperbolic monopoles. Communications in Mathematical Physics, 325(3), 821-845. https://doi.org/10.1007/s00220-013-1864-1

We construct a number of explicit examples of hyperbolic monopoles, with various charges and often with some platonic symmetry. The fields are obtained from instanton data in R 4 that are invariant under a circle action, and in most cases the monopol... Read More about Platonic hyperbolic monopoles.

Monopole operators and Hilbert series of Coulomb branches of 3d N = 4 gauge theories (2014)
Journal Article
Cremonesi, S., Hanany, A., & Zaffaroni, A. (2014). Monopole operators and Hilbert series of Coulomb branches of 3d N = 4 gauge theories. Journal of High Energy Physics, 2014(01), Article 005. https://doi.org/10.1007/jhep01%282014%29005

This paper addresses a long standing problem - to identify the chiral ring and moduli space (i.e. as an algebraic variety) on the Coulomb branch of an NN = 4 superconformal field theory in 2+1 dimensions. Previous techniques involved a computation of... Read More about Monopole operators and Hilbert series of Coulomb branches of 3d N = 4 gauge theories.

Auto-completion of Contours in Sketches, Maps and Sparse 2D Images Based on Topological Persistence (2014)
Presentation / Conference Contribution
Kurlin, V., Winkler, F., Negru, V., Ida, T., Jebelean, T., Petcu, D., …Zaharie, D. (2014). Auto-completion of Contours in Sketches, Maps and Sparse 2D Images Based on Topological Persistence. In SYNASC 2014 : 16th International Symposium on Symbolic and Numeric Algorithms for Scientific Computing (594-601). https://doi.org/10.1109/synasc.2014.85

We design a new fast algorithm to automatically complete closed contours in a finite point cloud on the plane. The only input can be a scanned map with almost closed curves, a hand-drawn artistic sketch or any sparse dotted image in 2D without any ex... Read More about Auto-completion of Contours in Sketches, Maps and Sparse 2D Images Based on Topological Persistence.