Papers, Posters, Talks etc...
Using Transition Systems to Describe and Predict the Behaviour of Structured Excitable Media, Stevens W. M. (2012), Natural Computing, DOI: 10.1007/s11047-012-9355-4 (Here is a link to the preprint of this paper)
Computing with Planar Toppling Domino Arrangements, Stevens W. M. (2012), Natural Computing, Vol 11, Issue 4, pages 665-672, DOI: 10.1007/s11047-012-9341-x
This is an extended version of the conference paper from 2011.
Time-dependent wave selection for information processing in excitable media, Stevens W. M., Adamatzky A, Jahan I, De Lacy Costello B (2012), Physical Review E 85, 066129 (2012) (Here is a link to the preprint of this paper)
Describes a way of constructing logic circuits in excitable media by selecting waves based on how long it takes them to propagate from place to place. An experimental implementation of a 4-bit integer square root circuit in a Belousov-Zhabotinsky excitable medium is described.
A self-replicating programmable constructor in a kinematic simulation environment, Stevens W. M. (2011)
Describes the 'CBlocks3D' environment and a self-replicating programmable constructor in that environment.
Computing with Planar Toppling Domino Arrangements, Stevens W. M. (2011)
Shows that any Boolean function can be implemented using a planar arrangements of dominoes - i.e. with no bridges for crossing one line of dominoes over another.
The longitudinal course of bipolar disorder as revealed through weekly text-messaging., Bopp J.M., Miklowitz D. J., Goodwin G. M., Stevens W., Rendell J. M., Geddes J. R. (2010). Bipolar Disorders Vol 12, pages 327-334.
My role in this work was the design and software implementation of a text-message based mood rating system.
Lithium plus valproate combination therapy versus monotherapy for relapse prevention in bipolar I disorder (BALANCE): a randomised open-label trial, The BALANCE investigators and collaborators (2010). The Lancet, Vol 375, Issue 9712, pages 385-395
My role in this work was data management and software support for the last 3 years of the BALANCE clinical trial.
Adapting Gosper's Hashlife Algorithm for Kinematic Environments, Stevens W. M. (2010)
A Kinematic Turing Machine, Stevens W. M. (2009)
This is a modified version of the conference paper from 2007.
A kinematic model of a self-replicating programmable constructing machine, Stevens W. M. (2009)
Automated mood monitoring and reporting with a novel graphical method of displaying mood variation over time, Stevens W. M., Rendell J. M., Attenburrow M-J, Geddes J. R. (2009)
Parts closure in a kinematic self-replicating programmable constructor, Stevens W. M. (2009)
Describes a part discriminating system in the 'CBlocks3D' environment.
Parts closure in a kinematic self-replicating programmable constructor, Stevens W. M. (2008)
I won a young author award for this paper/talk.
Logic circuits in a system of repelling particles, Stevens W. M. (2008)
This is a modified version of the workshop paper from 2006.
Simulating Self-Replicating Machines, Stevens W. M. (2007)
Describes the 'CBlocks' environment, describes an SRM in the CBlocks environment and discusses issues related to simulating self-replicating machines.
Diagram of SRM for 'Simulating Self-Replicating Machines' paper.
A Kinematic Turing Machine, Stevens W. M. (2007)
Presented at Unconventional Computing 2007 in Bristol, UK.
Describes the operation of a Turing machine in a kinematic simulation environment.
Logic circuits in a system of repelling particles, Stevens W. M. (2006)
Workshop presentation at the Unconventional Computing 2006 conference in York, UK.
Shows how logic circuits can be made in a very simple kinematic particle system.
Computation, Construction and Self-Replication, Stevens W. M. (2005)
A programmable constructor in a kinematic environment, Stevens W. M. (2005)
Nodes: An Environment for Simulating Self-Replicating Machines, Stevens W. M. (2004)
Describes the 'Nodes' environment, and introduces an SRM constructed in the Nodes environment.