Complex Systems Summer School 2012-Project Presentations - Revision history

Nonak: /* Cultural Evolution of Literary Genres */

2012-06-29T15:13:21Z

Cultural Evolution of Literary Genres

← Older revision		Revision as of 15:13, 29 June 2012
Line 126:		Line 126:
	===Cultural Evolution of Literary Genres===		===Cultural Evolution of Literary Genres===

	Graham, Dan, Benji~~, Nona~~		Graham, Dan, Benji

	Summary: This project explores the dynamics of cultural evolution using a case study: the rise and differentiation of literary genres. Genres are modeled as feature sets that may undergo gene-like mutations and are subject to the selective pressure of consumer preferences. We also hope to include the impact of institutional actors.		Summary: This project explores the dynamics of cultural evolution using a case study: the rise and differentiation of literary genres. Genres are modeled as feature sets that may undergo gene-like mutations and are subject to the selective pressure of consumer preferences. We also hope to include the impact of institutional actors.

Greb at 17:43, 28 June 2012

2012-06-28T17:43:55Z

← Older revision		Revision as of 17:43, 28 June 2012
Line 28:		Line 28:
	=== Collaboration in times of stress: an Agent Based Modelling approach ===		=== Collaboration in times of stress: an Agent Based Modelling approach ===

	Fabio ~~Cresto~~ Aleina, Elena ~~del Val~~, Tom ~~Fennewald~~ and Friederike ~~Greb~~		Fabio the Duke of Aleina, Elena, Tom and Friederike

	We want to investigate the influence of exogenous stress on cooperative behaviour. We propose an agent based model in which the agents can be interpreted as farmers living in a water limited environment. With changes in precipitation patterns, the farmers undergo stress, and we observe how this impacts relationships among farmers and their properties.		We want to investigate the influence of exogenous stress on cooperative behaviour. We propose an agent based model in which the agents can be interpreted as farmers living in a water limited environment. With changes in precipitation patterns, the farmers undergo stress, and we observe how this impacts relationships among farmers and their properties.

DPugh: /* Emergence of Money through an agent based model */

2012-06-28T15:55:19Z

Emergence of Money through an agent based model

← Older revision		Revision as of 15:55, 28 June 2012
Line 135:		Line 135:
	Aleksandra, David, Jianfeng, Vikram		Aleksandra, David, Jianfeng, Vikram

	~~We start from a well known model by Kiyotaki and Moore which shows~~ the emergence of money in ~~a homogeneous population and explore how heterogeneity affects this emergence through~~ an ~~agent based~~ model.		Ultimate goal of the project is to generate the emergence of money in an economy where there are fundamental limits on the ability of agents to commit. Currently we have completed the first 2 of the 4 parts of our ABM. Our most basic model provides a nice example (we think) of a phase transition.

	===Level-k thinking, collective behavior, and limit cycles===		===Level-k thinking, collective behavior, and limit cycles===

Jorodri: /* Political prediction markets: Can we predict election outcomes? */

2012-06-28T15:10:27Z

Political prediction markets: Can we predict election outcomes?

← Older revision		Revision as of 15:10, 28 June 2012
Line 14:		Line 14:
	Human impacts upon ecosystems – for example, the introduction of invasive species or the disturbance of the system and subsequent loss of species – may lead to collapse of entire ecological communities. We will continue to explore the persistence of these dynamic food webs under environmental perturbation after the summer school. We also plan to explore a separate structural model to study how the evolution of networks on both micro- and macroevolutionary timescales could possibly contribute to stability.		Human impacts upon ecosystems – for example, the introduction of invasive species or the disturbance of the system and subsequent loss of species – may lead to collapse of entire ecological communities. We will continue to explore the persistence of these dynamic food webs under environmental perturbation after the summer school. We also plan to explore a separate structural model to study how the evolution of networks on both micro- and macroevolutionary timescales could possibly contribute to stability.

	=== Political prediction markets: Can we predict election outcomes? ===		=== Political prediction markets: Can we use them to predict election outcomes? ===

	Joanne, Vikram, Matteo, Sanith		Joanne, Vikram, Matteo, Sanith

Jorodri: /* Price-time Dynamics of Contracts Traded on Prediction Markets */

2012-06-28T15:09:43Z

Price-time Dynamics of Contracts Traded on Prediction Markets

← Older revision		Revision as of 15:09, 28 June 2012
Line 14:		Line 14:
	Human impacts upon ecosystems – for example, the introduction of invasive species or the disturbance of the system and subsequent loss of species – may lead to collapse of entire ecological communities. We will continue to explore the persistence of these dynamic food webs under environmental perturbation after the summer school. We also plan to explore a separate structural model to study how the evolution of networks on both micro- and macroevolutionary timescales could possibly contribute to stability.		Human impacts upon ecosystems – for example, the introduction of invasive species or the disturbance of the system and subsequent loss of species – may lead to collapse of entire ecological communities. We will continue to explore the persistence of these dynamic food webs under environmental perturbation after the summer school. We also plan to explore a separate structural model to study how the evolution of networks on both micro- and macroevolutionary timescales could possibly contribute to stability.

	=== ~~Price-time Dynamics of Contracts Traded on Prediction Markets~~ ===		=== Political prediction markets: Can we predict election outcomes? ===

	Joanne, Vikram, Matteo, Sanith		Joanne, Vikram, Matteo, Sanith

Tangs: /* The Robustness, Stability and Persistence of Niche-Structured Food Webs */

2012-06-27T21:26:00Z

The Robustness, Stability and Persistence of Niche-Structured Food Webs

← Older revision		Revision as of 21:26, 27 June 2012
Line 8:		Line 8:
	Si, Miguel, Hide, Sarah		Si, Miguel, Hide, Sarah

	We are interested in the properties of food webs, a network structure describing who eats whom within an ecological community~~. Study of species-species interactions in these networks has been dominated by a focus on predator-prey relationships~~. In 2000, William and Martinez proposed the niche model, which generates synthetic food web structures by ordering species according to ‘niche values’ and assigning trophic relationships by allowing consumers to feed on the species whose niche values fall within a particular range. The niche model has successfully replicated many properties of empirical food webs.		We are interested in the properties of food webs, a network structure describing who eats whom within an ecological community. In 2000, William and Martinez proposed the niche model, which generates synthetic food web structures by ordering species according to ‘niche values’ and assigning trophic relationships by allowing consumers to feed on the species whose niche values fall within a particular range. The niche model has successfully replicated many properties of empirical food webs.

	However, whether the niche organization in food webs tends to produce more diverse, stable, robust and persistent communities remains unknown. In this study, we randomly generated food webs in which predator-prey links are formed according to the niche model and contrasted these with unstructured food webs in which predator-prey links are randomly assigned among species. We used the bioenergetic model to produce persisting food webs of both structural types. In the presentation on Friday, we will show a few preliminary results, such as the difference of the two types of food webs in complexity, robustness and stability.		However, whether the niche organization in food webs tends to produce more diverse, stable, robust and persistent communities remains unknown. In this study, we randomly generated food webs in which predator-prey links are formed according to the niche model and contrasted these with unstructured food webs in which predator-prey links are randomly assigned among species. We used the bioenergetic model to produce persisting food webs of both structural types. In the presentation on Friday, we will show a few preliminary results, such as the difference of the two types of food webs in complexity, robustness and stability.

Inamine at 20:01, 27 June 2012

2012-06-27T20:01:02Z

← Older revision		Revision as of 20:01, 27 June 2012
Line 4:		Line 4:

	<b>[[Presentations 2012\|SCHEDULE OF PRESENTATIONS SIGN-UP]]</b>		<b>[[Presentations 2012\|SCHEDULE OF PRESENTATIONS SIGN-UP]]</b>
			=== The Robustness, Stability and Persistence of Niche-Structured Food Webs ===

			Si, Miguel, Hide, Sarah

			We are interested in the properties of food webs, a network structure describing who eats whom within an ecological community. Study of species-species interactions in these networks has been dominated by a focus on predator-prey relationships. In 2000, William and Martinez proposed the niche model, which generates synthetic food web structures by ordering species according to ‘niche values’ and assigning trophic relationships by allowing consumers to feed on the species whose niche values fall within a particular range. The niche model has successfully replicated many properties of empirical food webs.

			However, whether the niche organization in food webs tends to produce more diverse, stable, robust and persistent communities remains unknown. In this study, we randomly generated food webs in which predator-prey links are formed according to the niche model and contrasted these with unstructured food webs in which predator-prey links are randomly assigned among species. We used the bioenergetic model to produce persisting food webs of both structural types. In the presentation on Friday, we will show a few preliminary results, such as the difference of the two types of food webs in complexity, robustness and stability.

			Human impacts upon ecosystems – for example, the introduction of invasive species or the disturbance of the system and subsequent loss of species – may lead to collapse of entire ecological communities. We will continue to explore the persistence of these dynamic food webs under environmental perturbation after the summer school. We also plan to explore a separate structural model to study how the evolution of networks on both micro- and macroevolutionary timescales could possibly contribute to stability.

	=== Price-time Dynamics of Contracts Traded on Prediction Markets ===		=== Price-time Dynamics of Contracts Traded on Prediction Markets ===

JGonzales at 18:03, 27 June 2012

2012-06-27T18:03:28Z

← Older revision		Revision as of 18:03, 27 June 2012
Line 3:		Line 3:
	Use this space to post project presentations and outlines. Include group members, a brief outline, and your slides.		Use this space to post project presentations and outlines. Include group members, a brief outline, and your slides.

			<b>[[Presentations 2012\|SCHEDULE OF PRESENTATIONS SIGN-UP]]</b>

	=== Price-time Dynamics of Contracts Traded on Prediction Markets ===		=== Price-time Dynamics of Contracts Traded on Prediction Markets ===

Freys at 17:24, 27 June 2012

2012-06-27T17:24:13Z

← Older revision		Revision as of 17:24, 27 June 2012
Line 128:		Line 128:

	===Level-k thinking, collective behavior, and limit cycles===		===Level-k thinking, collective behavior, and limit cycles===
	Seth, Daniel, ~~maybe~~ Cameron~~, Mikkel, and Jon~~		Seth, Daniel, Cameron

	What do all those things have in common? That's what we're trying to figure out. The sub-presentations of this project are satellites around an experimental result showing that the individual-level heuristic adjustment of what-you-think-I-think-you-think behavior leads to a group-level collective behavior that drives a periodic trajectory through the strategy space of Rock-Paper-Scissors. We will have an analysis of the data, an agent-based model establishing sufficient conditions, and a sketch of an analytic result modeling this phenomenon as symmetry-breaking.		What do all those things have in common? That's what we're trying to figure out. The sub-presentations of this project are satellites around an experimental result showing that the individual-level heuristic adjustment of what-you-think-I-think-you-think behavior leads to a group-level collective behavior that drives a periodic trajectory through the strategy space of Rock-Paper-Scissors. We will have an analysis of the data, an agent-based model establishing sufficient conditions, and a sketch of an analytic result modeling this phenomenon as symmetry-breaking.

Freys at 15:59, 27 June 2012

2012-06-27T15:59:03Z

← Older revision		Revision as of 15:59, 27 June 2012
Line 126:		Line 126:

	We start from a well known model by Kiyotaki and Moore which shows the emergence of money in a homogeneous population and explore how heterogeneity affects this emergence through an agent based model.		We start from a well known model by Kiyotaki and Moore which shows the emergence of money in a homogeneous population and explore how heterogeneity affects this emergence through an agent based model.

			===Level-k thinking, collective behavior, and limit cycles===
			Seth, Daniel, maybe Cameron, Mikkel, and Jon

			What do all those things have in common? That's what we're trying to figure out. The sub-presentations of this project are satellites around an experimental result showing that the individual-level heuristic adjustment of what-you-think-I-think-you-think behavior leads to a group-level collective behavior that drives a periodic trajectory through the strategy space of Rock-Paper-Scissors. We will have an analysis of the data, an agent-based model establishing sufficient conditions, and a sketch of an analytic result modeling this phenomenon as symmetry-breaking.