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Outputs (44)

A Procedure for Testing for Tokyo Type 1 Open-Ended Evolution. (2024)
Journal Article
Channon, A. (in press). A Procedure for Testing for Tokyo Type 1 Open-Ended Evolution. Artificial Life, 1-11. https://doi.org/10.1162/artl_a_00430

Tokyo Type 1 open-ended evolution (OEE) is a category of OEE that includes systems exhibiting the ongoing generation of adaptive novelty and ongoing growth in complexity. It can be considered as a necessary foundation for Tokyo Type 2 OEE (ongoing ev... Read More about A Procedure for Testing for Tokyo Type 1 Open-Ended Evolution..

The effect of social information use without learning on the evolution of social behavior (2021)
Journal Article
Channon, A., & Borg, J. M. (in press). The effect of social information use without learning on the evolution of social behavior. Artificial Life, 26(4), https://doi.org/10.1162/artl_a_00328

In a recent paper by Borg (2017) it was shown that social information alone, decoupled from any within-lifetime learning, can result in improved performance on a food foraging task compared to when social information is unavailable. Here we assess wh... Read More about The effect of social information use without learning on the evolution of social behavior.

The Effect of Social Information Use without Learning on the Evolution of Behaviour (2021)
Journal Article
Channon. (2021). The Effect of Social Information Use without Learning on the Evolution of Behaviour. Artificial Life, 431-454. https://doi.org/10.1162/artl_a_00328

In a recent paper by Borg & Channon [6] it was shown that social information alone, decoupled from any within-lifetime learning, can result in improved performance on a food foraging task compared to when so13 cial information is unavailable. Here we... Read More about The Effect of Social Information Use without Learning on the Evolution of Behaviour.

A Simple 3D-Only Evolutionary Bipedal System with Albatross Morphology for Increased Performance (2020)
Journal Article
Channon. (2020). A Simple 3D-Only Evolutionary Bipedal System with Albatross Morphology for Increased Performance. IEEE Computational Intelligence Magazine, 125-132. https://doi.org/10.1109/SSCI47803.2020.9308500

Bipedal walking is a difficult behaviour to encode into an evolutionary neural network, particularly in three-dimensional environments. Agents must be constantly maintaining balance alongside their primary objectives. Here we re-implement a simple ev... Read More about A Simple 3D-Only Evolutionary Bipedal System with Albatross Morphology for Increased Performance.

Evolving developmental, recurrent and convolutional neural networks for deliberate motion planning in sparse reward tasks (2020)
Thesis
Jolley, B. P. (2020). Evolving developmental, recurrent and convolutional neural networks for deliberate motion planning in sparse reward tasks. (Thesis). Keele University

Motion planning algorithms have seen a diverse set of approaches in a variety of disciplines. In the domain of artificial evolutionary systems, motion planning has been included in models to achieve sophisticated deliberate behaviours. These algorith... Read More about Evolving developmental, recurrent and convolutional neural networks for deliberate motion planning in sparse reward tasks.

The Use of Technology in the Subcategorisation of Osteoarthritis: a Delphi Study Approach (2020)
Journal Article
Mennan, C., Hopkins, T., Channon, A., Elliott, M., Johnstone, B., Kadir, T., …Roberts, S. (2020). The Use of Technology in the Subcategorisation of Osteoarthritis: a Delphi Study Approach. Osteoarthritis and Cartilage, 2(3), Article 100081. https://doi.org/10.1016/j.ocarto.2020.100081

Objective This UK-wide OATech+ Network consensus study utilised a Delphi approach to discern levels of awareness across an expert panel regarding the role of existing and novel technologies in osteoarthritis research. To direct future cross-disciplin... Read More about The Use of Technology in the Subcategorisation of Osteoarthritis: a Delphi Study Approach.

Neuroevolution of Humanoids that Walk Further and Faster with Robust Gaits (2019)
Journal Article
Channon. (2019). Neuroevolution of Humanoids that Walk Further and Faster with Robust Gaits. Artificial Life, 543 - 550. https://doi.org/10.1162/isal_a_00219

Bipedal locomotion requires precise rhythm and balance. Here we demonstrate two fitness-function enhancements applied to OpenAI?s 3D Humanoid-v1 walking task using a replica of Salimans et al.?s evolution strategy (Salimans et al., 2017). The first e... Read More about Neuroevolution of Humanoids that Walk Further and Faster with Robust Gaits.

Maximum Individual Complexity is Indefinitely Scalable in Geb (2019)
Journal Article
Channon. (2019). Maximum Individual Complexity is Indefinitely Scalable in Geb. Artificial Life, 134-144. https://doi.org/10.1162/artl_a_00285

Geb was the first artificial life system to be classified as exhibiting open-ended evolutionary dynamics according to Bedau and Packard’s evolutionary activity measures and is the only one to have been classified as such according to the enhanced ver... Read More about Maximum Individual Complexity is Indefinitely Scalable in Geb.

Maximum Individual Complexity is Indefinitely Scalable in Geb (2019)
Journal Article
Channon. (2019). Maximum Individual Complexity is Indefinitely Scalable in Geb. Artificial Life, 134-144. https://doi.org/10.1162/artl_a_00285

Geb was the first artificial life system to be classified as exhibiting open-ended evolutionary dynamics according to Bedau and Packard’s evolutionary activity measures and is the only one to have been classified as such according to the enhanced ve... Read More about Maximum Individual Complexity is Indefinitely Scalable in Geb.

An Overview of Open-Ended Evolution: Editorial Introduction to the Open-Ended Evolution II Special Issue. (2019)
Journal Article
Channon. (2019). An Overview of Open-Ended Evolution: Editorial Introduction to the Open-Ended Evolution II Special Issue. Artificial Life, 93 - 103. https://doi.org/10.1162/artl_a_00291

Nature's spectacular inventiveness, reflected in the enormous diversity of form and function displayed by the biosphere, is a feature of life that distinguishes living most strongly from nonliving. It is, therefore, not surprising that this aspect of... Read More about An Overview of Open-Ended Evolution: Editorial Introduction to the Open-Ended Evolution II Special Issue..

Open-Ended Evolution and Open-Endedness: Editorial Introduction to the Open-Ended Evolution I Special Issue. (2019)
Journal Article
Channon. (2019). Open-Ended Evolution and Open-Endedness: Editorial Introduction to the Open-Ended Evolution I Special Issue. Artificial Life, 1 - 3. https://doi.org/10.1162/artl_e_00282

Nature's spectacular inventiveness, reflected in the enormous diversity of form and function displayed by the biosphere, is a feature of life that distinguishes living most strongly from nonliving. It is, therefore, not surprising that this aspect of... Read More about Open-Ended Evolution and Open-Endedness: Editorial Introduction to the Open-Ended Evolution I Special Issue..

Opposing effects of final population density and stress on Escherichia coli mutation rate (2018)
Journal Article
Channon. (2018). Opposing effects of final population density and stress on Escherichia coli mutation rate. ISME Journal, 2981-2987. https://doi.org/10.1038/s41396-018-0237-3

Evolution depends on mutations. For an individual genotype, the rate at which mutations arise is known to increase with various stressors (stress-induced mutagenesis-SIM) and decrease at high final population density (density-associated mutation-rate... Read More about Opposing effects of final population density and stress on Escherichia coli mutation rate.

Environmental pleiotropy and demographic history direct adaptation under antibiotic selection (2018)
Journal Article
Channon. (2018). Environmental pleiotropy and demographic history direct adaptation under antibiotic selection. Heredity, 438-448. https://doi.org/10.1038/s41437-018-0137-3

Evolutionary rescue following environmental change requires mutations permitting population growth in the new environment. If change is severe enough to prevent most of the population reproducing, rescue becomes reliant on mutations already present.... Read More about Environmental pleiotropy and demographic history direct adaptation under antibiotic selection.

Evolving Robust, Deliberate Motion Planning With a Shallow Convolutional Neural Network (2018)
Journal Article
Channon. (2018). Evolving Robust, Deliberate Motion Planning With a Shallow Convolutional Neural Network. https://doi.org/10.1162/isal_a_00099

Deep Convolutional Neural Networks (ConvNets) have seen great success on machine learning tasks in recent years but have shown difficulty with tasks that require long-term deliberative planning. Whereas, purpose-built hybrid network architectures hav... Read More about Evolving Robust, Deliberate Motion Planning With a Shallow Convolutional Neural Network.

Toward Evolving Robust, Deliberate Motion Planning With HyperNEAT (2018)
Book Chapter
Channon, A., & Jolley, B. (2018). Toward Evolving Robust, Deliberate Motion Planning With HyperNEAT. In Proceedings of the IEEE Symposium Series on Computational Intelligence 2017 (3488 -3495)

Previous works have used a novel hybrid network architecture to create deliberative behaviours to solve increasingly challenging tasks in two-dimensional and threedimensional artificial worlds. At the foundation of each is a static hand-designed neur... Read More about Toward Evolving Robust, Deliberate Motion Planning With HyperNEAT.

Critical Mutation Rate has an Exponential Dependence on Population Size for Eukaryotic-length Genomes with Crossover (2017)
Journal Article
Channon. (2017). Critical Mutation Rate has an Exponential Dependence on Population Size for Eukaryotic-length Genomes with Crossover. Scientific reports, https://doi.org/10.1038/s41598-017-14628-x

The critical mutation rate (CMR) determines the shift between survival-of-the-fittest and survival of individuals with greater mutational robustness (“flattest”). We identify an inverse relationship between CMR and sequence length in an in silico sys... Read More about Critical Mutation Rate has an Exponential Dependence on Population Size for Eukaryotic-length Genomes with Crossover.

Critical Mutation Rate in a Population with Horizontal Gene Transfer (2017)
Book Chapter
Channon. (2017). Critical Mutation Rate in a Population with Horizontal Gene Transfer. In Proceedings of ECAL 2017: the 14th European Conference on Artificial Life (446-453). https://doi.org/10.7551/ecal_a_074

Horizontal gene transfer (HGT) enables segments of DNA to be transferred between individuals in a population in addition to from parent to child. It is a prominent process in bacterial reproduction. Existing in silico models have succeeded in predict... Read More about Critical Mutation Rate in a Population with Horizontal Gene Transfer.

Spontaneous mutation rate is a plastic trait associated with population density across domains of life. (2017)
Journal Article
Aston, E., McBain, A., Knight, C., Krašovec, R., Richards, H., Hatcher, C., …Gifford, D. (2017). Spontaneous mutation rate is a plastic trait associated with population density across domains of life. PLoS Biology, e2002731 - ?. https://doi.org/10.1371/journal.pbio.2002731

Rates of random, spontaneous mutation can vary plastically, dependent upon the environment. Such plasticity affects evolutionary trajectories and may be adaptive. We recently identified an inverse plastic association between mutation rate and populat... Read More about Spontaneous mutation rate is a plastic trait associated with population density across domains of life..

Open-Ended Evolution: Perspectives from the OEE1 Workshop in York (2016)
Journal Article
Channon. (2016). Open-Ended Evolution: Perspectives from the OEE1 Workshop in York. Artificial Life, 408-423. https://doi.org/10.1162/ARTL_a_00210

We describe the content and outcomes of the First Workshop on Open-Ended Evolution: Recent Progress and Future Milestones (OEE1), held during the ECAL 2015 conference at the University of York, UK, in July 2015. We briefly summarize the content of th... Read More about Open-Ended Evolution: Perspectives from the OEE1 Workshop in York.

Neuroevolution of Feedback Control for Object Manipulation by 3D Agents (2016)
Book Chapter
Stanton, A., & Channon, A. (2016). Neuroevolution of Feedback Control for Object Manipulation by 3D Agents. In Proceedings of the Artificial Life Conference 2016 (144-151)

Carlos Gershenson, Tom Froese, Jesus M. Siqueiros, Wendy Aguilar, Eduardo J. Izquierdo and Hiroki Sayama

Monotonicity of fitness landscapes and mutation rate control (2016)
Journal Article
Channon. (2016). Monotonicity of fitness landscapes and mutation rate control. Journal of Mathematical Biology, 1491-1524. https://doi.org/10.1007/s00285-016-0995-3

A common view in evolutionary biology is that mutation rates are minimised. However, studies in combinatorial optimisation and search have shown a clear advantage of using variable mutation rates as a control parameter to optimise the performance of... Read More about Monotonicity of fitness landscapes and mutation rate control.

Optimal mutation rate control under selection in hamming spaces (2015)
Presentation / Conference
Knight, C., Channon, A., Belavkin, R., Krasovec, R., & Aston, E. (2015, July). Optimal mutation rate control under selection in hamming spaces. Presented at Thirteenth European Conference on the Synthesis and Simulation of Living Systems (ECAL 2015), York

Where antibiotic resistance mutations meet quorum-sensing (2014)
Journal Article
Channon. (2014). Where antibiotic resistance mutations meet quorum-sensing. Microbial Cell, 250 - 252. https://doi.org/10.15698/mic2014.07.158

We do not need to rehearse the grim story of the global rise of antibiotic resistant microbes. But what if it were possible to control the rate with which antibiotic resistance evolves by de novo mutation? It seems that some bacteria may already do e... Read More about Where antibiotic resistance mutations meet quorum-sensing.

Mutation rate plasticity in rifampicin resistance depends on Escherichia coli cell-cell interactions (2014)
Journal Article
Channon, A. (2014). Mutation rate plasticity in rifampicin resistance depends on Escherichia coli cell-cell interactions. Nature communications, 3742 -?. https://doi.org/10.1038/ncomms4742

Variation of mutation rate at a particular site in a particular genotype, in other words mutation rate plasticity (MRP), can be caused by stress or ageing. However, mutation rate control by other factors is less well characterized. Here we show that... Read More about Mutation rate plasticity in rifampicin resistance depends on Escherichia coli cell-cell interactions.

Critical mutation rate has an exponential dependence on population size in haploid and diploid populations (2013)
Journal Article
Ashton, E., Channon, A., Day, C., & Knight, C. (2013). Critical mutation rate has an exponential dependence on population size in haploid and diploid populations. PloS one, e83438 -e83438. https://doi.org/10.1371/journal.pone.0083438

Understanding the effect of population size on the key parameters of evolution is particularly important for populations nearing extinction. There are evolutionary pressures to evolve sequences that are both fit and robust. At high mutation rates, in... Read More about Critical mutation rate has an exponential dependence on population size in haploid and diploid populations.

Testing the Variability Selection Hypothesis: The Adoption of Social Learning in Increasingly Variable Environments (2012)
Journal Article
Channon. (2012). Testing the Variability Selection Hypothesis: The Adoption of Social Learning in Increasingly Variable Environments. Artificial Life, 317 -324. https://doi.org/10.7551/978-0-262-31050-5-ch042

The variability selection hypothesis predicts the adoption of versatile behaviors and survival strategies, in response to increasingly variable environments. In hominin evolution the most apparent adaptation for versatility is the adoption of social... Read More about Testing the Variability Selection Hypothesis: The Adoption of Social Learning in Increasingly Variable Environments.

Critical mutation rate has an exponential dependence on population size (2011)
Book Chapter
Channon. (2011). Critical mutation rate has an exponential dependence on population size. In ECAL 2011 (117 -124)

Populations of individuals exist in a wide range of sizes, from billions of microorganisms to fewer than ten individuals in some critically endangered species. In any evolutionary system, there is significant evolutionary pressure to evolve sequences... Read More about Critical mutation rate has an exponential dependence on population size.

Discovering and maintaining behaviours inaccessible to incremental genetic evolution through transcription errors and cultural transmission (2011)
Book Chapter
Channon. (2011). Discovering and maintaining behaviours inaccessible to incremental genetic evolution through transcription errors and cultural transmission. In ECAL 2011 (101 -108). https://doi.org/10.7551/978-0-262-29714-1

In this work the question of whether the introduction of both transcription errors and cultural transmission, in the form of learning by imitation, can enable the evolution of behaviours inaccessible to incremental genetic evolution alone is assessed... Read More about Discovering and maintaining behaviours inaccessible to incremental genetic evolution through transcription errors and cultural transmission.

Neuroevolution of agents capable of reactive and deliberative behaviours in novel and dynamic environments (2007)
Journal Article
Channon. (2007). Neuroevolution of agents capable of reactive and deliberative behaviours in novel and dynamic environments. Lecture notes in computer science, 345 - 354. https://doi.org/10.1007/978-3-540-74913-4_35

Both reactive and deliberative qualities are essential for a good action selection mechanism. We present a model that embodies a hybrid of two very different neural network architectures inside an animat: one that controls their high level deliberati... Read More about Neuroevolution of agents capable of reactive and deliberative behaviours in novel and dynamic environments.

Unbounded Evolutionary Dynamics in a System of Agents that Actively Process and Transform Their Environment (2006)
Journal Article
Channon. (2006). Unbounded Evolutionary Dynamics in a System of Agents that Actively Process and Transform Their Environment. Genetic Programming and Evolvable Machines, 253 - 281. https://doi.org/10.1007/s10710-006-9009-3

Bedau et al.'s statistical classification system for long-term evolutionary dynamics provides a test for open-ended evolution. Making this test more rigorous, and passing it, are two of the most important open problems for research into systems of ag... Read More about Unbounded Evolutionary Dynamics in a System of Agents that Actively Process and Transform Their Environment.

The N-strikes-out algorithm: A steady-state algorithm for coevolution (2006)
Journal Article
Channon. (2006). The N-strikes-out algorithm: A steady-state algorithm for coevolution

We introduce the N-strikes-out algorithm, a simple steady-state genetic algorithm for competitive coevolution. The algorithm can be summarised as follows: Run competitions between randomly chosen individuals, keep track of the number of defeats for e... Read More about The N-strikes-out algorithm: A steady-state algorithm for coevolution.

Analysing co-evolution among artificial 3D creatures (2006)
Book Chapter
Channon. (2006). Analysing co-evolution among artificial 3D creatures. In Lecture Notes in Computer Science (167 -178)

This paper is concerned with the analysis of coevolutionary dynamics among 3D artificial creatures, similar to those introduced by Sims (1). Coevolution is subject to complex dynamics which are notoriously difficult to analyse. We introduce an improv... Read More about Analysing co-evolution among artificial 3D creatures.

A virtual creatures model for studies in artificial evolution (2005)
Book Chapter
Channon. (2005). A virtual creatures model for studies in artificial evolution. In 2005 IEEE Congress on Evolutionary Computation, vols 1-3, proceedings (565 -572)

We present the results of our replication of Karl Sims' work on the evolution of artificial creatures in a physically realistic 3D environment. We used standard McCulloch-Pitts neurons instead of a more complex set of ad hoc neurons, which we believe... Read More about A virtual creatures model for studies in artificial evolution.

Improving and still passing the ALife test: Component-normalised activity statistics classify evolution in Geb as unbounded (2003)
Book Chapter
Channon. (2003). Improving and still passing the ALife test: Component-normalised activity statistics classify evolution in Geb as unbounded. In Artificial Life VIII: proceedings of the Eighth International Conference on Artificial Life (173 -181)

Bedau, Snyder & Packard’s (1998) classification system for long-term evolutionary dynamics provides a test for openended evolution. Making this ALife test more rigorous, and passing it, are two of the most important open problems in the field. Previo... Read More about Improving and still passing the ALife test: Component-normalised activity statistics classify evolution in Geb as unbounded.

Passing the ALife test: activity statistics classify evolution in Geb as unbounded (2001)
Book Chapter
Channon. (2001). Passing the ALife test: activity statistics classify evolution in Geb as unbounded. In Advances in Artificial Life (417 - 426)

Bedau and Packard’s evolutionary activity statistics [1, 2] are used to classify the evolutionary dynamics in Geb [3, 4], a system designed to verify and extend theories behind the generation of evolutionary emergent systems. The result is that, acco... Read More about Passing the ALife test: activity statistics classify evolution in Geb as unbounded.

Towards the evolutionary emergence of increasingly complex advantageous behaviours (2000)
Journal Article
Channon. (2000). Towards the evolutionary emergence of increasingly complex advantageous behaviours. International Journal of Systems Science, 843 -860. https://doi.org/10.1080/002077200406570

The generation of complex entities with advantageous behaviours beyond our manual design capability requires long-term incremental evolution with continuing emergence. In this paper, we argue that artificial selection models, such as traditional gene... Read More about Towards the evolutionary emergence of increasingly complex advantageous behaviours.

Perpetuating evolutionary emergence (1998)
Book Chapter
Channon. (1998). Perpetuating evolutionary emergence. In From Animals to Animats 5: Proceedings of the Fifth International Conference on Simulation of Adaptive Behavior (SAB98), Zurich (534 -539)

Perpetuating evolutionary emergence is the key to artificially evolving increasingly complex systems. In order to generate complex entities with adaptive behaviors beyond our manual design capability, longterm incremental evolution with continuing em... Read More about Perpetuating evolutionary emergence.