R. C. Ball
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View article: Surfactancy in a tadpole model of proteins
Surfactancy in a tadpole model of proteins Open
We model the environment of eukaryotic nuclei by representing macromolecules by only their entropic properties, with globular molecules represented by spherical colloids and flexible molecules by polymers. We put particular focus on protei…
View article: Surfactancy in a tadpole model of proteins
Surfactancy in a tadpole model of proteins Open
We model the environment of eukaryotic nuclei by representing macromolecules by only their entropic properties, with globular molecules represented by spherical colloids and flexible molecules by polymers. We put particular focus on protei…
View article: Extra viewpoints for Ntail=30 phase diagram from Surfactancy in a tadpole model of proteins
Extra viewpoints for Ntail=30 phase diagram from Surfactancy in a tadpole model of proteins Open
Video showing Ntail=30 phase diagram at many angles to help visualise it in 3D.
View article: Time Reversal of the Overdamped Langevin Equation and Fixman's Law
Time Reversal of the Overdamped Langevin Equation and Fixman's Law Open
We discuss how the first order Langevin equation for the overdamped dynamics of an interacting system has a natural time reversal of simple but surprising form, with consequences for correlation functions. This leads to the correlation of …
View article: Murphy’s law, the fitness of evolving species, and the limits of software reliability
Murphy’s law, the fitness of evolving species, and the limits of software reliability Open
We tackle two problems of interest to the software assurance community. Firstly, existing models of software development (such as the waterfall and spiral models) are oriented towards one-off software development projects, while the growth…
View article: A next step in disruption management: combining operations research and complexity science
A next step in disruption management: combining operations research and complexity science Open
Railway systems occasionally get into a state of being out-of-control, meaning that barely any train is running, even though the required resources (infrastructure, rolling stock and crew) are available. Because of the large number of affe…
View article: Generalized Langevin equation formulation for anomalous diffusion in the Ising model at the critical temperature
Generalized Langevin equation formulation for anomalous diffusion in the Ising model at the critical temperature Open
We consider the two- (2D) and three-dimensional (3D) Ising models on a square lattice at the critical temperature T_{c}, under Monte Carlo spin flip dynamics. The bulk magnetization and the magnetization of a tagged line in the 2D Ising mo…
View article: Why Clothes Don’t Fall Apart: Tension Transmission in Staple Yarns
Why Clothes Don’t Fall Apart: Tension Transmission in Staple Yarns Open
The problem of how staple yarns transmit tension is addressed within abstract models in which the Amontons-Coulomb friction laws yield a linear programing (LP) problem for the tensions in the fiber elements. We find there is a percolation …
View article: Computationally efficient Brownian dynamics via wavelet Monte Carlo
Computationally efficient Brownian dynamics via wavelet Monte Carlo Open
We develop a new algorithm for the Brownian dynamics of soft matter systems that evolves time by spatially correlated Monte Carlo moves. The algorithm uses vector wavelets as its basic moves and produces hydrodynamics in the low Reynolds n…
View article: A two component railway model exhibiting service collapse
A two component railway model exhibiting service collapse Open
We model a railway network in terms of the flow of trains, and of memory of how long crews have been on duty. We impose limits at stations on the throughput of trains, the duty time of crew, and the availability of fresh crew. In the regim…