Santa Fe Institute Events Wiki - User contributions [en]

Complex Systems Summer School 2012-Project Presentations

2012-06-26T07:15:33Z

Fennewald: /* The CSSS Network */

{{Complex Systems Summer School 2012}}

Use this space to post project presentations and outlines. Include group members, a brief outline, and your slides.

=== Collaboration in times of stress: an Agent Based Modelling approach ===

Fabio Cresto Aleina, Elena del Val, Tom Fennewald and Friederike Greb

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.

=== Simple variation of the logistic map as a model to invoke questions on cellular protein trafficking ===
(Sepehr Ehsani, http://arxiv.org/abs/1206.5557)

Many open problems in biology, as in the physical sciences, display nonlinear and 'chaotic' dynamics, which, to the extent possible, cannot be reasonably understood. Moreover, mathematical models which aim to predict/estimate unknown aspects of a biological system cannot provide more information about the set of biologically meaningful (e.g., 'hidden') states of the system than could be understood by the designer of the model ab initio. Here, the case is made for the utilization of such models to shift from a 'predictive' to a 'questioning' nature, and a simple natural-logarithm variation of the logistic polynomial map is presented that can invoke questions about protein trafficking in eukaryotic cells.

===Changes in Social Network Structure in Response to Crisis: Using Twitter data to Explore the Effect of the Tōhoku Earthquake.===

Christa Brelsford and Xin Lu

Abstract:
We use twitter data from 7 days before and after the Tōhoku Earthquake to explore how cooperation rates, social network structure and connectivity, and social network vulnerability changed in Japan in response to the disaster. An English language data set is collected for the same time period to use as a control. Data is collected for a period of 96 hours starting from March 4th 2011 2:46pm JST and for 96 hours beginning March 11th 2011 2:46 pm JST. The rate of cooperative behavior, measured by the occurrence of helping words in tweets increases slightly in the English dataset and by an order of magnitude in the Japanese dataset. A network analysis is also performed. Network edges are retweets and direct messages. In future work, we hope to explore whether problem solving capacity in a social system changes in response to crises, based on changes in the rate of cooperation and information transfer in a network.

=== The CSSS Network ===

Tom & Riccardo (with JP and others)

We will investigate the questions you are dying to know: What interesting interactions are revealed from the first 3 weeks of the Complex System Summer School survey? Have barriers between academic disciplines been broken down? Do power laws fit the data!? ...

Let us know if you have specific questions or if you would like to be involved in data analysis!

Complex Systems Summer School 2012-Project Presentations

2012-06-26T07:15:16Z

Fennewald: /* The CSSS Network */

{{Complex Systems Summer School 2012}}

Use this space to post project presentations and outlines. Include group members, a brief outline, and your slides.

=== Collaboration in times of stress: an Agent Based Modelling approach ===

Fabio Cresto Aleina, Elena del Val, Tom Fennewald and Friederike Greb

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.

=== Simple variation of the logistic map as a model to invoke questions on cellular protein trafficking ===
(Sepehr Ehsani, http://arxiv.org/abs/1206.5557)

Many open problems in biology, as in the physical sciences, display nonlinear and 'chaotic' dynamics, which, to the extent possible, cannot be reasonably understood. Moreover, mathematical models which aim to predict/estimate unknown aspects of a biological system cannot provide more information about the set of biologically meaningful (e.g., 'hidden') states of the system than could be understood by the designer of the model ab initio. Here, the case is made for the utilization of such models to shift from a 'predictive' to a 'questioning' nature, and a simple natural-logarithm variation of the logistic polynomial map is presented that can invoke questions about protein trafficking in eukaryotic cells.

===Changes in Social Network Structure in Response to Crisis: Using Twitter data to Explore the Effect of the Tōhoku Earthquake.===

Christa Brelsford and Xin Lu

Abstract:
We use twitter data from 7 days before and after the Tōhoku Earthquake to explore how cooperation rates, social network structure and connectivity, and social network vulnerability changed in Japan in response to the disaster. An English language data set is collected for the same time period to use as a control. Data is collected for a period of 96 hours starting from March 4th 2011 2:46pm JST and for 96 hours beginning March 11th 2011 2:46 pm JST. The rate of cooperative behavior, measured by the occurrence of helping words in tweets increases slightly in the English dataset and by an order of magnitude in the Japanese dataset. A network analysis is also performed. Network edges are retweets and direct messages. In future work, we hope to explore whether problem solving capacity in a social system changes in response to crises, based on changes in the rate of cooperation and information transfer in a network.

=== The CSSS Network ===

Tom & Riccardo (with JP and others)

We will investigate the questions you are really dying to know: What interesting interactions are revealed from the first 3 weeks of the Complex System Summer School survey? Have barriers between academic disciplines been broken down? Do power laws fit the data!? ...

Let us know if you have specific questions or if you would like to be involved in data analysis!

Complex Systems Summer School 2012-Project Presentations

2012-06-26T07:13:59Z

Fennewald: /* The CSSS Network */

Complex Systems Summer School 2012-Project Presentations

2012-06-26T07:11:45Z

Fennewald: /* The CSSS Network */

Complex Systems Summer School 2012-Project Presentations

2012-06-26T07:09:50Z

Fennewald: /* The CSSS Network */

Complex Systems Summer School 2012-Project Presentations

2012-06-26T07:08:40Z

Fennewald: /* The CSSS Network */

{{Complex Systems Summer School 2012}}

Use this space to post project presentations and outlines. Include group members, a brief outline, and your slides.

=== Collaboration in times of stress: an Agent Based Modelling approach ===

Fabio Cresto Aleina, Elena del Val, Tom Fennewald and Friederike Greb

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.

=== Simple variation of the logistic map as a model to invoke questions on cellular protein trafficking ===
(Sepehr Ehsani, http://arxiv.org/abs/1206.5557)

Many open problems in biology, as in the physical sciences, display nonlinear and 'chaotic' dynamics, which, to the extent possible, cannot be reasonably understood. Moreover, mathematical models which aim to predict/estimate unknown aspects of a biological system cannot provide more information about the set of biologically meaningful (e.g., 'hidden') states of the system than could be understood by the designer of the model ab initio. Here, the case is made for the utilization of such models to shift from a 'predictive' to a 'questioning' nature, and a simple natural-logarithm variation of the logistic polynomial map is presented that can invoke questions about protein trafficking in eukaryotic cells.

===Changes in Social Network Structure in Response to Crisis: Using Twitter data to Explore the Effect of the Tōhoku Earthquake.===

Christa Brelsford and Xin Lu

Abstract:
We use twitter data from 7 days before and after the Tōhoku Earthquake to explore how cooperation rates, social network structure and connectivity, and social network vulnerability changed in Japan in response to the disaster. An English language data set is collected for the same time period to use as a control. Data is collected for a period of 96 hours starting from March 4th 2011 2:46pm JST and for 96 hours beginning March 11th 2011 2:46 pm JST. The rate of cooperative behavior, measured by the occurrence of helping words in tweets increases slightly in the English dataset and by an order of magnitude in the Japanese dataset. A network analysis is also performed. Network edges are retweets and direct messages. In future work, we hope to explore whether problem solving capacity in a social system changes in response to crises, based on changes in the rate of cooperation and information transfer in a network.

=== The CSSS Network ===

Tom & Riccardo (with JP and others)

We will investigate the questions you are dying to know: What interesting interactions are revealed from the first 3 weeks of the Complex System Summer School survey? Have barriers between academic disciplines been broken down? Do power laws fit the data!? ...

Let us know if you would like to be involved. If you have specific questions you would like to investigate please let us know!

Complex Systems Summer School 2012-Project Presentations

2012-06-26T06:52:55Z

Fennewald:

Complex Systems Summer School 2012-After Hours

2012-06-22T22:37:31Z

Fennewald: /* Fossils and Hot Springs */

{{Complex Systems Summer School 2012}}

Use this space to organize your own after hours activities.

==Fossils and Hot Springs==

Hi, we are planning to look for fossils in the surroundings of Mora (about one hour drive from SF) tomorrow. We expect to find trilobites, maybe also ammonoids and other stuff. On the way back we'd like to stop at some hot spring resort.
Departure tomorrow saturday, at about 9:30am from the parking circle. The drivers may have to gather earlier...

If you are interested, please let us know asap so that we can organize the cars.

'''Tom's Car'''

1. Nick G

2. Sarah

3. Dan

4. Nick A.

'''Christa's Car'''

5. Matteo

6. Riccardo

7. Priya

8. Tom

Your Paleo-team

==Santa Fe Farmer's Market==

[[JP]] is going to the Farmer's Market on Saturday morning! Anyone want to come along? Meet 10:00am in the parking circle. There's food and all sorts of good things to buy to support our local economy, so if you'd like to sleep in and get breakfast there that might be an option...

Car 1: JP's Camry (5 seats)

1.JP

2. Vikram

3.

4.

5.

==El Rancho de las Golondrinas==

[[JP]] is going to take a trip out to [[http://www.golondrinas.org Golondrinas Museum]] and a tour of La Cienega on Saturday. Maybe we'll do a bit of hiking and find some petroglyphs. Meet up at 12:30 in the coffee shop.

Car 1: JP's Camry

1.JP

2. Vikram

3.

4.

5.

==Rodeo de Santa Fe==

We are planning to head to the [http://rodeodesantafe.org/ Rodeo] today (June 21) at 6:00p.m. please meet drivers in the parking circle and post your car if you can drive:

Car 1: Juniper's Car 

1. Katrien

2. Nick A.

3. Xue

4. Mikkel

Car 1: JP's Car 

1. Matteo

2. Avril K.

3. Laurent

4. Marco

Car 1: Sander's Car 

1. Georg G.

2. Ben

3. Vanessa

4. Daniel S

Car 1: Joanne's Car 

1. Charlie

2.

3.

'''People who still need rides'''

1.

==Trip to Taos and alpaca farm==
I am planning to rent a car to visit Taos and a alpaca farm this saturday June 23.
The alpaca farm in my plan is Victory Ranch. http://victoryranch.com/
The car should be able to carry 5 people and let's share the cost.
1. Jianfeng Xu

2. Xin lu

3. Si Tang

4.

5.

==Trip to a museum==
On weekend (Saturday?) I'm planning to visit the Georgia O'Keeffe Museum; after that I'm going to see some more of Santa Fe (no plan yet -- waiting for proposals). Anyone interested?
Cheers,
Piotr

==Road Trip to Boulder, Colorado==

From Gareth: Hi all, I'm planning on making a trip up to Boulder, CO for the weekend. It's about a 6 1/2 hr drive from Santa Fe and I'll be renting a car. My main reason for the trip is to see a friend of mine so you might have to sort your own accommodation (camping/youth hostel/hotel). We're planning on a bit of hiking nearby. The plan is to leave straight from class on Friday evening and arrive back in Santa Fe on Sunday eve. If you're interested in splitting petrol and rental fee and joining me for some Springsteen singalongs then sign up:

1.

2.

3.

4.

==Some Banjo fun out on the town==

My brother will be having a concert this Saturday June 16 at the Second Street Brewery (original location) from 6-9p.m. I will be at the parking circle at 6p.m. For those who do not sign up for a car don't forget Friday and Saturday $5 cabs.

[http://www.secondstreetbrewery.com/2012/05/todd-the-fox-9/ Todd and the Fox Venue Details]

[http://www.toddandthefox.com/fr_home.cfm To hear their music]

If anyone would like to join:

Car 1: Juniper's Car 

1. Katrien (not sure if we'll be back from the lake trip by 6pm. Somebody can take my place if they want.) back up: Georg Weber

2. Marque

3. Sarah

4. Marco

==Dancing==

Swing dancing on Monday 18th June.
Lessons from 7 to 8 P.M.
Dancing from 8 on wards.
The cost is $8 including the lesson and dancing (or $3 for the dancing). Venue: Odd Fellows Hall, 1125 Cerrillos Road. We have not yet decided on transportation. We could either take a cab or walk -- Let's try to decide during dinner.
Sign up below if you are interested:

1.Vikram -- Slightly biased towards taking the lesson. 
2. Xue -- dancing, though not a strong preference. 
3. Mark - I could use a lesson, or twelve. Do we have transportation? 
4. Chloe -- would rather walk down with everyone than skip the lesson. 
5. Aleksandra -- would try lesson, may be stay for dancing. 

PS: If you are on the edge because you want to attend the session on "Introduction to Python". I would be happy to walk you through the basics of Python at a later time. -- Vikram

PPS: how about a Dancing Python lunch tomorrow? I can do intro tutoring too. --Chloe

Other varieties --

There's a contra on the 23rd; swing dancing most Mondays; this is supposed to be a great tango town, and the drop-in-friendly beginner class on Thursday PM was good ($20, though).

[http://www.santafenewmexican.com/Sidebar/Dance_fever_in_Santa_Fe swing, salsa, tango]

[http://www.folkmads.org/may_jun_calendar12.html contras, here and ABQ]

We've heard great Appalachian-style folk musicians here already, but I haven't found a ceili or hoedown locally.

--Chloe

==Trip to Taos==

JP and Tom are going to go to Taos on Saturday 6/16. Sights to see will include the High Road to Taos, Taos Pueblo, the Taos Gorge, Taos Earthships, and the plenty of Taos Hippies.
 
Car 1: JP's Camry 

1.[[JP]] 
2. 
3.Piotr 
4.Matteo 
5.Vikram 
 

Car 2: Tom's Car 
1 
2 Miguel 
3 Riccardo 
4 Priya 

From Andres: I'm sorry... I decided to stay tomorrow at St. John's. I'm very sorry to letting you know so late...! I want to rest, and there is some work I'd like to do...
From Nick: Same for me guys. I feel exhausted. Sorry for telling you so late. Enjoy!

==Trip to Abiquiu==

We are organizing a trip to lake Abiquiu this weekend. ATTENTION ATTENTION! Drivers (Christa, Fabio, John, Tom and David) will meet at 8:30 tomorrow morning (Saturday), and will go with Christa to town to rent 4 cars. We'll pick the others up at 9:30. Those in Christas car, meet at 9am. See you tomorrow!

Fabio

Friederike

Elena

Mikkel

John

Nona

Abby

Marco

Aleksandra

Jasmeen

Dan

Sandro

Ian (if there is any room)

Vanessa (ditto)

Christa (my car seats 5 including me, but I want to stop by Los Alamos to pick up my dog on the way. That adds ~30 min to the drive. "Christa's Honda has manual transmission. do we need a second driver on the car who can drive a stick shift car?" "Yes"- Christa

1. Christa

2. Xue (though I'm also willing to be a driver if necessary)

3. Katrien

4. Jianfeng Xu

5. Xin

Tom

Nick A

==Bandelier Field Trip==

Bandelier Field Trip
Trip to Bandelier National Monument on Sat. June 9.
We might string a visit to the Valles Caldera and Bradbury Science Museum/Los Alamos in as well. If another group would like to stay around Bandelier, we can split up.

Head over to the [[Bandelier Trip 2012 | Bandelier Trip]] Page to sign up!

==Mafia==

[[JP]] is a huge fan of Mafia/Werewolf. Let's play a game sometime in the lower commons.

Let's meet Saturday evening at 8:00 in the lower commons for our first game.

- [[Ryan_James|Ryan]] is down for this.

- Jasmeen is also a big fan of Mafia.

- Ian has never played, but is interested

- Vikram is interested in learning the game.

- Tom F. would like to join and can also teach "The Resistance" a very similar game

- Katrien wants to play too

==FOOTBALL!==

Anyone up for a friendly game of soccer? We can check out equipment from the gym.

[Team: Continuous!] 
1. [[Piotr Milanowski|Piotr]] 
2. [[Marco Duenas|Marco]] 
3.[[Oleksandr Ivanov|Alex]] 
4. 
5. 
[Team: Discrete!] 
1. [[Fabio Cresto Aleina|Fabio]] 
2. [[Matteo Chinazzi|Matteo]] 
3.[[JP]] 
4. 
5.

Experiment sign-up

2012-06-17T21:10:36Z

Fennewald: /* Monday June 18 */

Hi! Please sign up for one slot below. The experiment will be held in the Senior Common Room (JP's office) next to the great hall. Please arrive on time!

- Katrien, Vanessa, Sandro, Cameron & Jasmeen

==Monday June 18==

Morning Break:

9.30-9.40: Ryan

9.40-9.50: Benji

9.50-10.00: Friederike

10.00-10.10: Oscar

10.10-10.20: Tom

10.20-10.30:

10.30-10.40:

Lunch Break:

12.05-12.15: Chloe

12.15-12.25:

12.25-12.35:

12.35-12.45:

12.55-1.05:

1.05-1.15:

1.15-1.25:

Afternoon:

4.30-4.40:

4.40-4.50:

4.50-5.00:

5.00-5.10:

5.10-5.20:

5.20-5.30:

5.30-5.40:

5.40-5.50:

5.50-6.00:

6.00-6.10:

6.10-6.20:

6.20-6.30:

6.30-6.40:

6.40-6.50:

6.50-7.00:

Complex Systems Summer School 2012-After Hours

2012-06-15T00:56:01Z

Fennewald: /* Trip to Abiquiu */

{{Complex Systems Summer School 2012}}

Use this space to organize your own after hours activities.

==Dancing at the Rouge Cat==

Some of us will be going dancing on Friday night at the [http://rougecat.com/ Rouge Cat] they have a downstairs disco floor and it's a whole lot of fun. JP and I will be leaving SJC parking circle around 10:00p.m. to head over there.

Car 1: Juniper's Car 

1.

2.

3.

4.

Car 2: JP's Car 

1.

2.

3.

4.

==Some Banjo fun out on the town==

My brother will be having a concert this Saturday June 16 at the Second Street Brewery (original location) from 6-9p.m. I will be at the parking circle at 6p.m.

[http://www.secondstreetbrewery.com/2012/05/todd-the-fox-9/ Todd and the Fox Venue Details]

[http://www.toddandthefox.com/fr_home.cfm To hear their music]

If anyone would like to join:

Car 1: Juniper's Car 

1. Katrien

2. Marque

3. Sarah

4. Marco

==Dancing==
The beginner tango classes tonight (Thursday, 14th June) are open to drop-ins, especially if we have lead-follow parity, but they're expensive for intro dance classes: $20 from 7:30 to 9. 
1. Chloe 
2. Vikram 
3. Aleksandra 

We'll share a cab from in front of the dining hall, leaving 7PM.

Other varieties --

There's a contra on the 23rd; swing dancing most Mondays; this is supposed to be a great tango town, and I'm looking for drop-in-friendly beginner classes...

[http://www.santafenewmexican.com/Sidebar/Dance_fever_in_Santa_Fe swing, salsa, tango]

[http://www.folkmads.org/may_jun_calendar12.html contras, here and ABQ]

We've heard great Appalachian-style folk musicians here already, but I haven't found a ceili or hoedown locally.

--Chloe

==Trip to Taos==

JP and Tom are going to go to Taos on Saturday 6/16. Sights to see will include the High Road to Taos, Taos Pueblo, the Taos Gorge, Taos Earthships, and the plenty of Taos Hippies.
 
Car 1: JP's Camry 

1.[[JP]] 
2.Nick G 
3.Piotr 
4.Matteo 
5.Vikram 
 

Car 2: Tom's Car 
1 Andres G. 
2 Miguel 
3 Riccardo 
4 Priya 

==Trip to Abiquiu==

We are organizing a trip to lake Abiquiu this weekend. Google maps says it should take about 1:10 hour driving from Santa Fe. Who's interested? We'll have to rent cars to go there.

Fabio

Friederike

Elena

Mikkel

John

Nona

Abby

Marco

Aleksandra

Jasmeen

Dan

Christa (my car seats 5 including me, but I want to stop by Los Alamos to pick up my dog on the way. That adds ~30 min to the drive. "Christa's Honda has manual transmission. do we need a second driver on the car who can drive a stick shift car?"

1. Christa

2. Xue (though I'm also willing to be a driver if necessary)

3. Katrien

4. Jianfeng Xu

5. Xin

Tom

==Bandelier Field Trip==

Bandelier Field Trip
Trip to Bandelier National Monument on Sat. June 9.
We might string a visit to the Valles Caldera and Bradbury Science Museum/Los Alamos in as well. If another group would like to stay around Bandelier, we can split up.

Head over to the [[Bandelier Trip 2012 | Bandelier Trip]] Page to sign up!

==Mafia==

[[JP]] is a huge fan of Mafia/Werewolf. Let's play a game sometime in the lower commons.

Let's meet Saturday evening at 8:00 in the lower commons for our first game.

- [[Ryan_James|Ryan]] is down for this.

- Jasmeen is also a big fan of Mafia.

- Ian has never played, but is interested

- Vikram is interested in learning the game.

- Tom F. would like to join and can also teach "The Resistance" a very similar game

- Katrien wants to play too

==FOOTBALL!==

Anyone up for a friendly game of soccer? We can check out equipment from the gym.

[Team: Continuous!] 
1. [[Piotr Milanowski|Piotr]] 
2. [[Marco Duenas|Marco]] 
3.[[Oleksandr Ivanov|Alex]] 
4. 
5. 
[Team: Discrete!] 
1. [[Fabio Cresto Aleina|Fabio]] 
2. [[Matteo Chinazzi|Matteo]] 
3.[[JP]] 
4. 
5.

Complex Systems Summer School 2012-Projects & Working Groups

2012-06-07T20:20:25Z

Fennewald: /* Project proposals */

{{Complex Systems Summer School 2012}}

==Project proposals==

=== Nonequilibrium game theory ===
My hope is to adapt some SFI-based models, by people like Crutchfield and Farmer, so that they will quantitatively or qualitatively reproduce features of real human data. Of course, that is very specific, and I'm up for all kinds of ideas in the areas of game learning, game dynamics, small group collective behavior, cognitive science, nonlinear time series, non-eq time series, etc., etc.

Meet me, Seth Frey, at dinner on Thursday and Friday. Also, here's a [http://posterhall.org/igert2012/posters/218 fun 3-minute video] of the effect I'm personally the most interested in, with a special appearance from The Princess Bride.

=== Enzyme kinetics – Do enzymes just accelerate equilibrium or play an active role in chemical reactions? ===
Enzyme networks (e.g. glycolysis) and catalysts in complex mixtures (e.g. Belusov-Zhabotinski reaction) can profoundly influence the outcome of a chemical reaction system. What about a single enzyme? Biochemistry textbooks uniformly say that an enzyme accelerates a reaction without altering its outcome. Yet, the set of differential equations that generically describes enzyme catalysis has remarkable resemblance to the Roessler equations (a textbook example of a non-linear, complex system). With a fixed substrate input or a steady substrate flow, a single enzyme probably cannot affect the reaction outcome. However, sinusoidal or pulsating substrate input, substrate activation or product inhibition, coupling of two enzymes could turn the reaction pattern non-linear. For this project, the sets of equations to study are quite well established – they need to be analyzed. In contrast to some of the more ambitious ideas circulated, this task is exhaustively doable in less than four weeks.

I am Georg Weber. If you are interested in studying this problem, please find me on Tuesday over lunch or dinner (or talk to me at any other unstructured time).
=== Traffic pattern analysis - Can we estimate car velocity by only observing car counts? ===
==== Problem statement ====
Imagine you have a monitored highway section with a start and end point. At both points you count the number of cars that pass by. The question I'd like to answer / simulate / estimate is: can we make some inference about the velocity of cars although we only have their counts? This would be very useful from an engineering / economic perspective because it's much easier / cheaper to count cars instead of actually tracking them from A to B.
==== Ideas on how to approach this ====
I have some intuition about how to go about this, but these are purely statistical (think of it as birth and death process; or as particles in a system that have a certain lifetime - cars in the highway section are like particles in a system, and their velocity is just inverse proportional to their lifetime in this highway section). I would like to see if using explicit physical modeling of motion and agent-based modeling of traffic flow could shed more light on this problem.

'''Update 06/05/12:''' Just today we saw ''Takens theorem'' about how we can infer a systems structure from only observing a subset of variables. Well, it seems like that's exactly what this project is about.

If you are interested to see more about this check out the [[Georg_M_Goerg#SFI_Project:_Traffic_pattern_analysis_-_Can_we_estimate_car_velocity_by_only_observing_car_counts.3F_.3D|SFI Project]] subsection on [[Georg_M_Goerg|Georg M. Goerg]] or email me to my_3_initials_in_lowercase@stat.cmu.edu. Let's say we meet on Wednesday for lunch (or just ask me any other time you see me around).

=== Cultural Evolution - things that look like drift but aren't ===
Lots of cultural evolution looks like drift (Bently et al 2004 'Random drift and culture change"). But what social transmission or cognitive learning mechanisms are isomorphic to random sampling with replacement from cultural inputs? In biological evolution, drift serves as a null model of sorts - one that should be ruled out before you can claim that anything more interesting is happening. However, it's not clear what the "uninteresting" type of change is for things that replicate by passing through human cognition and human social systems - like culture does. Is there even a reasonable equivalent of drift in cultural transmission? How should we go about conceptualizing and modeling the evolutionary forces at play in culture?

One candidate for a drifty-lookin' human behavior is probability matching: when people reproduce similar distributions of variation to that which they've learned from. And probability matching is rampant in human behavior (from language learning, to decision making, and even at the neural level). But I think this is a clearly different process than drift, however it still may qualify under Bentley's vague criteria - we can test that out. And there have got to be more drift-esque processes, anyone have any ideas?

If you're interested in these issues or modeling evolution (of any type of system), please give me a shout!

Vanessa

vanferdi [at] gmail.com

==="Small Steps and Big Ideas" Group===

[http://tuvalu.santafe.edu/events/workshops/index.php/Christa_Brelsford Christa] [http://tuvalu.santafe.edu/events/workshops/index.php/Daniel_Wu Dan] [http://tuvalu.santafe.edu/events/workshops/index.php/Xin_Lu Xin] and [http://tuvalu.santafe.edu/events/workshops/index.php/Thomas_Fennewald Tom] spent a while talking after dinner about a bunch of big ideas. Some things we thought about were *big data type network problems, *integrating qualitative social information with models of physical systems, *using games to understand cooperation and decision making.

We'll meet at dinner at 5:30 today (Tuesday, June 5th) in the cafeteria.

Dan: Here's a really relevant paper I've come across "intervening to achieve cooperative ecosystem management" JASSS http://jasss.soc.surrey.ac.uk/4/2/4.html

=== 107 Proteins in 10-15 cubic meters ===
Cells rely on proteins to perform vital metabolic and signaling functions; however, it is unclear how proteins are successfully directed to their necessary cellular location(s) in a densely-packed macromolecular environment within the cytoplasm and on the cellular membrane in a short timescale (see for example [http://www.pnas.org/content/108/16/6438.full Weigel et al., PNAS 2011]). Using the cell as a manipulatable model of complexity, one could begin to define the parameters and questions, as they pertain to prokaryotic and eukaryotic cells. If interested, please drop me a line: Sepehr Ehsani; sepehr.ehsani[at]utoronto.ca.

=== Innovation and Technological Progress ===

I noticed that a number of people mentioned that they were interested in some way in relation to innovation. I was wondering if anyone was interested in a project looking at how particular technologies progress over time and whether charting the form of successful (and/or unsuccessful) previous technologies such as the transistor, fission reactor, mobile phone, etc. in terms of either price, efficiency, or some other variable may be useful in predicting whether a current technology such as solar PV, fuel cell, or something else is following a similar trajectory. Other possible ideas might be to look at using patent, publication, or collaboration network data to reveal certain features of innovation that are not captured by other statistics, particularly for technologies that have yet to reach the market. SFI Professor Doyne Farmer has looked at some of this already in 'The Role of Design Complexity in Technology Improvement', see link: http://adsabs.harvard.edu/abs/2009arXiv0907.0036M

This could be a jumping off point for some ideas on data, methods, models etc. Just throwing the idea out there and it's welcome to completely change but if you're interested, message me (Gareth Haslam) haslam [at] ias.unu.edu or find me in class. [[Innovation Group Project]]

=== Space, Stochasticity, Stability; Speciation? ===

[http://tuvalu.santafe.edu/events/workshops/index.php/Xue_Feng Xue], [http://tuvalu.santafe.edu/events/workshops/index.php/Chloe_Lewis Chloe] and [http://tuvalu.santafe.edu/events/workshops/index.php/Xiaoli_Dong Xiaoli]are all working in ecosystems that experience_ a lot of unpredictability in a limiting ecosystem variables (water and/or nutrients); we see patchiness in space and time in how organisms are arranged; and we have some ideas about how the stochasticity may cause the spatial arrangements. [http://tuvalu.santafe.edu/events/workshops/index.php/Si_Tang Si] is working on the stability and robustness of ecosystems.

With enough time, this is likely to involve speciation either to express different strategies, or as a result of spatial separation.

The [[Spatial-Stochastic]] group is writing up their ideas to share here and look for overlap and coupling.

==== Entrenchment and rhythms ====

One idea that I had was to look at the entrenchment properties of various systems. This is an universal phenomena that arises from nonlinear mechanisms interacting with a fluctuation environment and appears most often in animal and plant physiological rhythms (e.g. circadian rhythms, sleep cycles) and result in predictable oscillations that can also sometimes be forced into stable/unstable states by noise (in the case of humans, this can result in disease). I would like to see if there are any mechanisms that produce similar behavior at the ecosystem level based on structural or species/functional diversity, especially in climates where the energy/water input is non-uniform. The "noise" in this case could be natural or anthropogenic disturbances. I think this can be generalized into many different types of systems. If you have an idea on this, please shoot me an email at xue.feng@duke.edu

=== Plasticity in Neural Networks ===
I've done some modeling which shows that the amount of genetic variation that accumulates at any particular metabolic gene (enzyme) in a population at any given time is a function of the network topology in which the gene is embedded, as well as the distance of the network output from an optimum. So, for instance, in a linear metabolic network, enzymes at the beginning of a pathway will tend to be more constrained (show less variation in the population) than at the end of the pathway. This makes sense given that any changes in those first genes would ripple through the system and have a greater relative effect than mutations in later genes. However, this is only true when a population is already close to an optimum. When far from an optimum, we see the exact opposite trend with more variation in the front of the pathway. This also makes sense - when far from a goal, taking bigger steps gives individuals a better chance of achieving higher fitness. The system as a whole then uses the different relative step sizes according to pathway position to "fine tune" its output.
I think these findings are quite general - at least the model we used was simple enough that it could apply to many different types of directional developmental processes. We can conceptualize these "genes" more generally as sequential steps in a developmental process with some arbitrary goal. These could be steps in a factory assembly line, major product revisions versus minor releases, or (and this is my favorite), neurons learning about their environment. I'm curious what would happen if we took a similar approach to model neural networks. Genetic variation is the raw material for evolution while neural plasticity is the raw material for learning. The question we would be trying to answer is where, within a neural network, would we expect the most plasticity given a particular network topology and distance form a learning goal.
Please contact me (Mark Longo) if this sounds interesting. I'll be available during unstructured time, or you can email mlongo@stanford.edu.
[http://tuvalu.santafe.edu/events/workshops/index.php/Mark_D._Longo]

=== Robustness of complex networks ===
[[File:Zoo.png|thumb|300px|Fig. 1. Zoo of complex networks (an example). Taken from Sol´e and Valverde, 2001.]]
==== Problem statement ====
Complex networks have various properties which can be measured in real networks (WWW, social networks, biological networks), e.g. degree distribution, modularity, hierarchy, assortativity etc. Robustness of complex networks is a big question, however only some progress have been done in this direction. For example, it was shown that the scale-free networks are much more topologically robust to random attacks than random networks. Many people claim that various characteristics of complex networks will influence the robustness interdependently. The question I am interested in is how?

==== Approach ====
The idea is to generate continuous topology space of various complex networks (networks with different modularity, degree distribution, hierarchy etc) and use it to measure their robustness (see Fig. 1). There are many approaches to measure the robustness of complex networks. For example we can remove edges of vertices of a complex network graph and look at the size of a giant cluster. We can discuss other possibilities.

If you are interested you can contact me directly or via my E-mail: krystoferivanov@gmail.com or via my [[Oleksandr Ivanov|discussion page in CSSS 2012 wiki]].

==== Relevant literature ====
* [http://www.barabasilab.com/pubs/CCNR-ALB_Publications/199910-15_Science-Emergence/199910-15_Science-Emergence.pdf BA Scale-free network]
* [http://people.maths.ox.ac.uk/maini/PKM%20publications/195.pdf How to generate Scale-free modular network using preferential attachment]
* [http://www.barabasilab.com/pubs/CCNR-ALB_Publications/200007-27_Nature-ErrorAttack/200007-27_Nature-ErrorAttack.pdf Error and attack tollerance of complex networks]
* [http://www.cis.upenn.edu/~mkearns/teaching/NetworkedLife/hierarchical.pdf Hierarchical organization in complex networks]
* [http://arxiv.org/pdf/cond-mat/0402009v1.pdf Scale-free networks with tunable degree distribution exponents]
* [http://arxiv.org/pdf/cond-mat/0110452v1.pdf Scale free networks with tunable clustering]
* [http://vw.indiana.edu/netsci06/conference/Ng_Structural.pdf Structural Robustness of Complex networks]
* [http://arxiv.org/pdf/cond-mat/0205405.pdf Assortative mixing in networks]
* [http://www.cis.upenn.edu/~mkearns/teaching/NetworkedLife/prefatt.pdf Mean field theory to study scale-free networks]
* [http://www.graphanalysis.org/SIAM-PP08/Leskovic.pdf Kroneker Graphs]
* [http://www.lem.sssup.it/WPLem/files/2011-07.pdf Exact maximum-likelihood method to detect patterns in real networks]
* [http://www-users.york.ac.uk/~lsdc1/SysBiol/kitano.robustness.naturegenetics.2004.pdf Biological robustness]
* [http://arxiv.org/ftp/cond-mat/papers/0202/0202410.pdf Attack vulnerability of complex networks]
* [http://jmvidal.cse.sc.edu/papers/nair11a.pdf Supply Network Topology and Robustness against Disruptions – an investigation using multi agent model]

* Add a relevant paper...

=== Systemic Risk in Financial Networks and/or an ABM of money/liquidity===

'''Systemic Risk in Financial Networks:''' Hypothesis: the motive to diversify risk at the level of the individual agent (i.e., for an agent to increase its connectivity) will increase systemic risk (by systemic risk I mean vulnerability of the system to widespread collapse). Point of departure is the [http://en.wikipedia.org/wiki/Forest-fire_model Forest Fire] model from statistical physics.

Key difference(s) between the physics version of the Forest Fire model, and the "economics" version of the Forest Fire model I have in mind are:
* Tree growth probability (which determines network structure) must be endogenous. Agents must be able to choose which other agents to link with.
* Probability of lightning strikes (i.e., defaults on specific loans) must also be endogenous.

I think that financial networks might exhibit self-organizing criticality in the sense that diversification will reduce the probability of lightning strikes (i.e., defaults), however over time systemic risk builds up as a result of the diversification which means that eventually a small number of lightning strikes might be enough to bring the entire system down.

'''ABM of the emergence of Money:'''
Basically, I would be interested in building an ABM of the emergence of money based around the following economic models of money developed by Nobu Kiyotaki and John Moore:
* [[File:Kiyotaki_and_Moore_(2001).pdf | Evil is the Root of all Money]]
* [[File:Financial-Deepening.pdf | Financial Deepening]]

These models take a broad view of money: "money" is any asset which is widely accepted as a medium of exchange. In these models agents manage projects which require capital investment now in order to generate a return at some point in the future and agents must trade financial promises (think debt contracts) in order to obtain the needed investment. Two key parameters of is these models (which are assumed COMMON to all agents in the above models in order to maintain analytical tractibility) are 0 < theta < 1 and 0 < phi < 1. Theta is the fraction of the future return from the project that an agent can promise to repay in the future in exchange for investment now. Phi is the fraction of the face value of a debt contract (which by construction is a contract between two agents) that can be re-sold to a third agent.

Hypothesis: In an ABM where agents differ in terms of both theta and phi, the promises of only a small number of agents will be widely traded (i.e., will serve as money).

If anyone might be interested in working on these projects, send me and email: drobert.pugh at gmail dot com

=== Price-time dynamics of contracts traded on prediction markets===
Prediction markets have been shown to outperform traditional methods of polls and opinion surveys in forecasting future events. I am interested in exploring the price-time dynamics of contracts traded on prediction markets to better understand how they are able to aggregate individual opinion to establish collective insight.

Several questions that I’m curious to probe further:
* How do ‘information shocks’ generated by news sources influence price-time trajectories?
* Can features of the underlying dynamics be characterized using a simple model?
* What is the minimum number of traders required for an accurate prediction?
On a separate note, I invite you to share your opinion regards whether “China will win the most medals at the 2012 London Olympics”, by logging into the following [https://csss12.inklingmarkets.com/user/login site] (please send me your email address and I will send you the login details).

If you haven't used a prediction market before don't worry -just follow the instructions provided in the site to 'buy' and 'sell' contracts according to your expectation.

If you are interested in the discussing any of the above questions or have other ideas related to prediction markets please get in touch with me at: sanith at mitre dot org

=== Internal models: what do they do and how are they built?===
In the past decade(s) Bayesian statistics has come to dominate empirical science. Consequently, the significance of prior beliefs for guiding inference has become widely accepted. But how do we map the concept of prior beliefs onto natural systems? I argue that the composition of organisms realize internal models of their environment. These internal models manifest as structured behavior, which we scientists describe as reflecting prior beliefs or bias. In humans you have reflexes at one extreme and the influence of memories upon behavior at the other. It is an open question how these internal models are instantiated in biological systems. Are they structural motifs in neural networks? Protein networks within cells? Concepts such as memory, storage, and recall provide relevant bridges between the statistical formulation of these ideas and the physics of computation, but these are jumping off points at best.

My suspicion is that part of the challenge is we don’t have a clear understanding of what benefits internals models impart to organisms beyond some general statement about resolving uncertainty. This is compounded by the fact that we probably wouldn’t recognize an internal model if we saw one. This is why I find work over the past decade upon self-localizing and mapping (SLAM) systems to be so interesting. To my knowledge, these are the first man-made systems designed with the objective of imparting complex internal models to artificial systems. The Mars rover is a SLAM system. The driverless car depends critically upon a SLAM system. The successes, and failures, of these systems have exposed the complexity of functionalities we use so naturally that they evade our notice. These include differentiating between static and dynamic elements of our environment as well as ascribing our sensations to external or internal causes. In the least, the design of these systems offer first order models for what an internal model of non-trivial complexity might look like.

I’m interested in exploring the role of internal models as well as how they are embedded in natural systems. I welcome you to join to me to discuss these ideas in the seminar room after 3 on Wednesday and after 4 on Thursday. Maybe we'll go to the coffee shop if that makes more sense. Feel free to email me at: jlong29@gmail.com (John Long)

=== Rain-Climate-Agriculture Interactions ===

We are trying to think about the influence of different precipitation/climate regimes on farming strategies and crop prices. It is still a very vague idea, and we're meeting at 4:15 in front of the cafeteria to brainstorm a bit (possibly outside). If you're interested in it, you're very welcome to join us! fabio.cresto-aleina@zmaw.de and fgreb@uni-goettingen.de

Complex Systems Summer School 2012-After Hours

2012-06-07T13:40:40Z

Fennewald: /* Mafia */

{{Complex Systems Summer School 2012}}

Use this space to organize your own after hours activities.

==Bandelier Field Trip==

Bandelier Field Trip
Trip to Bandelier National Monument on Sat. June 9.
We might string a visit to the Valles Caldera and Bradbury Science Museum/Los Alamos in as well. If another group would like to stay around Bandelier, we can split up.

Head over to the [[Bandelier Trip 2012 | Bandelier Trip]] Page to sign up!

==Mafia==

[[JP]] is a huge fan of Mafia/Werewolf. Let's play a game sometime in the lower commons.

- [[Ryan_James|Ryan]] is down for this.

- Jasmeen is also a big fan of Mafia.

- Ian has never played, but is interested

- Vikram is interested in learning the game.

- Tom F. would like to join and can also teach "The Resistance" a very similar game

==FOOTBALL!==

Anyone up for a friendly game of soccer? We can check out equipment from the gym.

[Team: Continuous!] 
1. [[Piotr Milanowski|Piotr]] 
2. [[Marco Duenas|Marco]] 
3.[[Oleksandr Ivanov|Alex]] 
4. 
5. 
[Team: Discrete!] 
1. [[Fabio Cresto Aleina|Fabio]] 
2. [[Matteo Chinazzi|Matteo]] 
3.[[JP]] 
4. 
5.

Bandelier Trip 2012

2012-06-07T13:38:54Z

Fennewald: /* STILL NEEDS A SEAT! */

{{Complex Systems Summer School 2012}}

Please sign up here so we know who's going. 
Also: If you have a car, please let us know. The more cars, the more people. 

We'll meet Saturday at 10:00am in the parking circle.

Please remember to bring a hat, sunscreen, water, hiking shoes, and anything else you'll need for a day out in the field.

==Cars:==

===Tom's Sedan: 4 seats===
1. [[Nicholas Allgaier]] 

2. Vikram Vijayaraghavan 

3. Katrien Beuls 

4. Riccardo Fusaroli 

===John Paul's Camry: 4 (maybe 5) seats===

1. [[John Paul]] 

2. [[Matteo Chinazzi]] 

3. [[Chloe Lewis]] 

4. [[Xue Feng]] 

5. [[Joanne Rodrigues]] 

===Juniper's Car: 4 seats===

1. Jasmeen Kanwal

2. Sarah Tweedt

3. Mark Longo

4. Hide Inamine

===[http://tuvalu.santafe.edu/events/workshops/index.php/Christa_Brelsford Christa]'s Car: 4 (maybe 5) seats===

1. Christa

2. Nicolas Goudemand

3. Marco

4. [http://tuvalu.santafe.edu/events/workshops/index.php/Xin_Lu Xin]

5(middle seat in a 2 door civic). [[Miguel Lurgi]]

===Charlie's car: 2 seats ===
My car's not that useful for this trip because I took out so many of the seats. I have only two seats besides the driver seat. Better than nothing.

1. Andres Gomez-Lievano

2. Vanessa Ferdinand

===STILL NEEDS A SEAT!===
1. Priya Subramanian

2. [[Piotr Milanowski | Piotr]]

3. Georg M Goerg

4. Oleksandr Ivanov

5. Ben Althouse

6. Georg Weber

7. Oscar Patterson

8. David Pugh

9. Abby Horn

10. Ian Wood

11. Friederike Greb

12. Jianfeng Xu

13. Tom Fennewald

Thomas Fennewald

2012-06-05T07:35:02Z

Fennewald:

Contact Info:

tom.fennewald[at]gmail.com

314.623.9967

About:

I'm a doctoral candidate in the Inquiry Methodology program at Indiana University. Before venturing into education, learning science, and the philosophy of social science, I received a B.S. in Chemistry from Missouri Science and Technology and worked for the Dept. of Energy at the Hanford Site / Pacific Northwest National Laboratory and a variety of other laboratories. I currently work as methodology consultant and project evaluator at the Center for Urban and Multicultural Education at Indiana University where I am the lead evaluator of the NSF funded Graduate STEM Fellows in GK-12 Education program. My interests are wide and include languages, dinosaurs, swimming, and pop dance from many times and cultures, especially contemporary Bhangra.

Research:

My research focuses on two areas. One is the development of economic, political, and environmental games as critical research methods that promote players to reflect on their decisions and the development of norms, institutions, and sustainability. Key aspects in the development of these games have included offering alternatives to standard game theorietic assumptions of player rationality and finding ways to balance player motivations in ways that are neither purely cooperative nor purely competitive, leaving players with situations that feel less contrived and more like real life than most games. These games are systemic in nature, and players' choices have consequential effects on the system. Please email me if you would like to see a 2 page paper on this research that includes data from simulations.

My other strand of research applies philosophy in an analysis of research practice in the social sciences. Using Habermas' theory of knowledge to understanding validity, bias, and reliability in research practice, this work suggests alternatives to positivist and post-positivist conceptions are, when dealing with normative issues, both desirable and necessary. This builds on Habermas' assertion that inquiry into positivist assumptions is not possible in positivist research since positivist research avoids inquiry into the interest laden domains that motivate positivist scholars. I'll be happy to tell more to those interested!

Thomas Fennewald

2012-06-05T07:33:58Z

Fennewald:

Contact Info:

tom.fennewald[at]gmail.com

314.623.9967

About:

I'm a doctoral candidate in the Inquiry Methodology program at Indiana University. Before venturing into education, learning science, and the philosophy of social science, I received a B.S. in Chemistry from Missouri Science and Technology and worked for the Dept. of Energy at the Hanford Site / Pacific Northwest National Laboratory and a variety of other laboratories. I currently work as methodology consultant and project evaluator at the Center for Urban and Multicultural Education at Indiana University where I am the lead evaluator of the NSF funded Graduate STEM Fellows in GK-12 Education program. My interests are wide and include languages, dinosaurs, swimming, and pop dance from many times and cultures, especially contemporary Bhangra.

Research:

My research focuses on two areas. One is the development of economic, political, and environmental games as critical research methods that promote players to reflect on their decisions and the development of norms, institutions, and sustainability. Key aspects of this work have included offering alternatives to standard game theorietic assumptions of player rationality and finding ways to balance player motivations in ways that are neither purely cooperative nor purely competitive, leaving players with situations that feel less contrived and more like real life than most games. These games are systemic in nature, and players' choices have consequential effects on the system. Please email me if you would like to see a 2 page paper on this research that includes data from simulations.

My other strand of research applies philosophy in an analysis of research practice in the social sciences. Using Habermas' theory of knowledge to understanding validity, bias, and reliability in research practice, this work suggests alternatives to positivist and post-positivist conceptions are, when dealing with normative issues, both desirable and necessary. This builds on Habermas' assertion that inquiry into positivist assumptions is not possible in positivist research since positivist research avoids inquiry into the interest laden domains that motivate positivist scholars. I'll be happy to tell more to those interested!

Thomas Fennewald

2012-06-05T07:19:15Z

Fennewald: Created page with 'Contact Info: tom.fennewald[at]gmail.com 314.623.9967 About: I'm a doctoral candidate in the Inquiry Methodology program at Indiana University. Before venturing into education,…'

Alfred Hubler's Nonlinear Dynamics Lab 2012

2012-06-04T05:11:03Z

Fennewald:

{{Complex Systems Summer School 2012}}

==Thursday, June 7, 6:00pm==

1. Sarah Tweedt 
2. Georg F. Weber 
3. Georg M. Goerg 
4. Cameron Smith 
5. Mikkel Vestergaard 
6. Friederike Greb 
7. Fabio Cresto Aleina 
8. Benji zusman 
9. Elena del Val 
10.Riccardo Fusaroli 
11. Nick Allgaier 
12.John Long 
13. Sepehr Ehsani 
14. David Pugh 
15.Keegan Hines 

==Friday, June 8 7:00am==
PLEASE NOTE THAT THIS IS AN EARLY MORNING CLASS! 
1. 
2. 
3. 
4. 
5. 
6. 
7. 
8. 
9. 
10. 
11. 
12. 
13. 
14. 
15. 

==Monday, June 11, 6:00pm==
1. Hidetoshi Inamine 
2. Dan Wu 
3. Xiaoli Dong 
4. Si Tang 
5. Abby Horn 
6. Xue Feng 
7. Priya Subramanian 
8. Oscar Patterson 
9. Vanessa Ferdinand 
10.Tom Fennewald 
11. 
12. 
13. 
14. 
15. 

==Tuesday, June 12, 6:00pm==
1. Marco Duenas

2. Jasmeen Kanwal 
3. 
4. 
5. 
6. 
7. 
8. 
9. 
10. 
11. 
12. 
13. 
14. 
15.