Pattern formation and chemical evolution in extended Gray-Scott models

Visa enkel post
dc.contributor.authorBuric, Filip
dc.contributor.departmentChalmers tekniska högskola / Institutionen för energi och miljösv
dc.contributor.departmentChalmers University of Technology / Department of Energy and Environmenten
dc.date.accessioned2019-07-03T13:31:58Z
dc.date.available2019-07-03T13:31:58Z
dc.date.issued2014
dc.description.abstractPattern formation in reaction-diffusion systems has been the subject of study in a variety of natural disciplines. In this thesis we investigate the behaviour of an abstract pattern-forming autocatalytic system based on the Gray-Scott model, featuring a small number of related chemical species. The aim is to investigate the form of interaction that takes place between these species, whether competition or cooperation, and how this relates to the overall pattern generation. Through the perspective of chemical evolution we seek to observe what long-term behaviour emerges, both in terms of population composition and structure formation. The work is largely exploratory and we approached the observed system properties from various angles to characterise them. We report that systems composed of 2 species were seen to be unstable and only achieve transient joint pattern formation, while the 3-species extension reached stability for a limited class of configurations. This class produced rich behaviour in the form of dynamic patterns with shifting structural features involving long transients, including a novel type of pattern, not seen in other studies of the Gray-Scott model or related models. Both systems are examples of catalytic hypercycles. In terms of pattern formation, the exhibited structural features reflect local species populations and in general are not themselves decisive for the outcome of species interactions. In an unconstrained evolution scenario, we report a strongly directed evolutionary path towards selfish species and loss of structure.
dc.identifier.urihttps://hdl.handle.net/20.500.12380/203896
dc.language.isoeng
dc.relation.ispartofseriesRapportserie för Avdelningen för fysisk resursteori : 2014:04
dc.setspec.uppsokLifeEarthScience
dc.subjectGrundläggande vetenskaper
dc.subjectAnnan naturvetenskap
dc.subjectAnnan teknik
dc.subjectBasic Sciences
dc.subjectOther Natural Sciences
dc.subjectOther Engineering and Technologies
dc.titlePattern formation and chemical evolution in extended Gray-Scott models
dc.type.degreeExamensarbete för masterexamensv
dc.type.degreeMaster Thesisen
dc.type.uppsokH
local.programmeComplex adaptive systems (MPCAS), MSc
Ladda ner
Original bundle
Visar 1 - 1 av 1
Bild (thumbnail)
Namn:
203896.pdf
Storlek:
25.57 MB
Format:
Adobe Portable Document Format
Beskrivning:
Fulltext
Ladda ner
Samling
Examensarbeten för masterexamen