Santa Fe Institute Events Wiki - User contributions [en]

Complex Systems Summer School 2012-After Hours

2012-06-28T18:06:58Z

Greb:

{{Complex Systems Summer School 2012}}

Use this space to organize your own after hours activities.

== Weekend at the Carlsbad caverns (driving through Roswell!) ==

We two lazy Italians (Fabio and Sandro) have some vacations after the school, and after the suggestion of JP we decided to drive to Carlsbad caverns during the weekend. We will go to Albuquerque on Saturday to rent a car, and we plan to arrive to Carlsbad on Saturday evening. We have tents, and we still have one place available: who wants to join? You'll have to come bcak on your own, since we're heading westwards afterwards...

== Ride to Albuquerque late Friday night ==

Looking for a group of people going away early on Saturday morning (30th) from Albuquerque..
Currently the last shuttle for the day on 29th leaves St. John's at 6 p.m.
So if we have a few people, we can explore other ways to get to Albuquerque later in the night (after the bbq and party). Please let me know or sign up here with name and time of preference to leave St. John's.
'''Priya'''

==Kasha-Katuwe Tent Rocks National Monument==

[http://www.blm.gov/nm/st/en/prog/recreation/rio_puerco/kasha_katuwe_tent_rocks.html The Tent Rocks national monument] offers some stunning views. There are several hiking trails
here varying in length and difficulty -we can decide depending on everyone's interest.
Meet Sunday 24th at 9am in the parking circle.

'''Sanith's Car'''

1.

2.

3.

4.

==The Best Exotic Marigold Hotel==

I have been planning to see this [http://www.fandango.com/thebestexoticmarigoldhotel_147777/movieoverview?date= movie] for quite awhile, if you would like to go I have space for 4. Meet Saturday 23rd at 6.15pm in the parking circle.

'''Sanith's Car'''

1.

2.

3.

4.

==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.

Update - we are trying to get more vehicles!

'''Tom's Car'''

1. Nick G

2. Sarah

3. Dan

4. Nick A.

'''Christa's Car'''

5. Matteo

6. Riccardo

7. Priya

8. Tom

'''Still needs a car:'''

9.Keegan

10. Jasmeen

11. Vanessa

12. Benji

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. Aleksandra

4.

5.

6. Xue (I'll run down and join you guys there).

==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. Xue

4. Fabio

5. Nona (? still not sure)

==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==

(Car is Full now) 

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 

==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).

For anyone interested: bus leaves from Museum Hill @ 1043am; I will be waiting in the parking circle from 1030am.

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.

Complex Systems Summer School 2012-Project Presentations

2012-06-28T17:43:55Z

Greb:

{{Complex Systems Summer School 2012}}

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

[[Presentations 2012|SCHEDULE OF PRESENTATIONS SIGN-UP]]
=== 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. 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.

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

Joanne, Vikram, Matteo, Sanith

Prediction markets have been shown to outperform traditional methods of polls and opinion surveys in forecasting future events. The futures contracts traded in these markets assess the expectation of occurrence of a variety of events spread across multiple domains (political, economic, entertainment, financial and weather). We explore the feasibility of 'predicting' the outcome of binary true/false prediction market contracts ahead of their expiry date using a neural-network based machine learning approach. In addition we focus on the characteristics of political-based contracts to establish whether they exhibit characteristic 'fundamental' properties.

=== How Complex Languages Replicate through Simple Brains ===

Katrien, Vanessa, Sandro, Cameron, Jasmeen

Through the use of an iterated learning experiment, we investigated the transmission of a "high entropy", randomised initial language through successive generations of participants. We want to see what features of the language replicated most easily, and what structure emerged by the end of the chain. Our hypothesis is that the language converges to a "low entropy" equilibrium state with a minimal number of words, morphemes, and form-meaning distinctions.

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

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.

=== 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!

=== Is there a method in the madness? the dynamic structures of human language use ===

Priya and Riccardo

Psychiatric anecdotal reports point to the monotony, lack of emotion and sometimes intelligibility in many clinical populations. Linear measures of fluency and prosody, however, present only controversial differences between patients and healthy controls and only in unnatural phonations (i.e. say "aaaaa" for 30 secs).
We therefore go complex and chaotic on a set of more ecological recordings and transcriptions from 4 clinical populations (Asperger's, Schizophrenics, Depressed and Right Hemisphere Damage patients) as well as from healthy controls.
We then set a classifier-driven race: will non-linear analyses outcompete linear analyses in discriminating between pathologies?

=== Escaping the Poverty Trap: Modeling the Interplay Between Economic Growth and the Ecology of Infectious Disease ===

Georg, Ben, Laurent, Oscar

The dynamics of economies and infectious disease are inexorably linked: economic well-being influences health (sanitation, nutrition, etc) and health influences economic well-being (labor productivity lost to sickness and disease). Often societies are locked into "poverty traps" of poor health and poor economy. Here, we demonstrate poverty traps formed in models of infection and endogenous growth, as well as ways to break out of poverty traps. We explore two mechanisms of escape: one, through an influx of capital, and another through changing the percentage of GDP spent on healthcare. We find large influxes of capital is successful, but increasing health spending does not. Our results have important policy implications in the distribution of aid and within-country healthcare spending.

=== The Targeting and Timing of Treatment Influences the Emergence of Influenza Resistance in Structured Populations ===

Ben, Laurent, Oscar, Georg

Evolution of antiviral resistance in influenza carries large societal impacts through morbidity and mortality caused by treatment failure. Several previous studies put forth theory regarding the optimal timing, targeting and absolute level of treatment in populations. Few of these studies, however, have considered populations with explicit structure. Here we present a model of antiviral resistance on networks and explore the timing, targeting and levels of treatment. Interestingly, we find bistability as a result of treatment leading to the existence of an unstable manifold, above which successful treatment (i.e.: no resistance) is impossible. We find, contrary to previous results, that degree-targeted treatment is not optimal, and leads to higher levels of resistance than random treatment. Additionally, in accordance with previous results, we find an optimum level of treatment which is less than 100%. These findings findings have important consequences in guiding policy behind influenza treatment. The bistability indicates that caution should be taken when treating populations when the absolute numbers of infections are unknown. Positively, our results indicate that putting resources into targeted treatment is not necessary, random treatment is preferable.

=== Learning in Random Boolean Networks ===

Nick A., Keegan, Matteo, Vikram, Sarah, Mark

Inspired by biochemical networks which adapt on evolutionary timescales, neural networks that adapt during development and learning, and universal computation in cellular automata, we have implemented several models of learning in Random Boolean Networks (RBNs) in order to better understand the relationships between network structure, node interaction rules, and network output.

=== Enzyme Catalysis and the Outcome of Chemical Reactions ===
Piotr and Georg W.
Enzymes are catalysts that accelerate chemical reactions but do not affect their outcome. This traditional paradism was developed under artificail test tube conditions. Our project investigates the possibility that the presence of an enzyme can alter the course of a reaction if it takes place under more physiologic conditions.

=== How Does a Stochastic Environment affect Community Assembly? ===

Xue, Χλοε, Xiaoli

We are interested in how exogenous temporal variability in resource availability affects the community structure of organisms with different resource-use strategies. Organisms induce additional resource stress on each other through competition. This is an abstraction of an arid environment with unreliable rainfall; the organisms themselves have been abstracted to four unitless parameters that allocate their resources to different parts of their lifecycles. The system has memory, as the previous presence of an organism affects the resource transport mechanism (an abstraction of soil).

=== How Does a Network’s Structure Influence its Traceability? ===

Xin and Abby

We are interested in systematically studying the problem of finding the source of a contamination spread through a network. We model a contamination spreading through the food distribution network, which we represent by interconnections between farmers, distributors, and retailers, and construct an estimator for the outbreak source given only this structure. We show how the ability of the estimator to narrow down the source identification problem changes with the connectivity and the number of observations. We propose a measure for traceability, or the overall ability to identify the source of spreading given any set of outbreak observations, based on entropy. We show how this measure appropriately reflects the range of uncertainty in identifying the source. We believe this measure may be useful in the design of networks that are conducive to accurate identification of the source of contamination.

=== We Got the Skills to Pay the Bills: Exploring the Link Between Occupation Diversity and Innovation===

Andrés, Charlie, Gareth, and Nick

Where does diversity in skills or occupations come from and why does it lead to more innovative cities? Previous work in this area has shown that there is a scaling behaviour which allows citizens of larger cities to earn an extra 15% in income whilst making use of 15% fewer gas stations, for example. Making use of occupation, patent, and population data of US Metropolitan Statistical Areas (MSA), we try to understand what factors make successful cities. Here we assume that successful cities are those cities which are most innovative as determined by the production of patents. In addition we use agent-based modelling to explore how and why people acquire new skills and whether this leads to more productive cities.

=== Space of complex networks and robustness ===
Ian, Marco, Xin, and Oleksandr

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. Various characteristics of complex networks might influence the robustness differently. The question is how?

We generated continuous topological space of networks with respect to degree distribution (from random to scale-free) and clustering (from none to high). Then we attacked the network by removing vertices randomly and highly connected (hubs). The next step is to calculate network robustness, it is non-trivial task because there are many different ways to do it. So far we calculate the size of giant component during attack process for the entire space.

=== Trade network formation: the role of technology and geography ===

Marco and Matteo

Geography and technology play important roles in economic activities, e.g. international trade flows diminish dramatically with distance; salaries, prices, and factor endowments vary across locations; and productivities are really different across countries' industries. International trade theories have gained some non-negligible reputation explaining the sizes of aggregated trade flows, nonetheless few attention has being payed to the formation of the bilateral trade relations. We develop a network formation model that incorporates differences in technological capabilities across countries and the effect of the geographical distance as a proxy of trade barriers.

===Cultural Evolution of Literary Genres===

Graham, Dan, Benji, Nona

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.

Methods: Agent Based Modeling, Genetic Algorithms, Cluster Analysis, Phylogenetics

===Emergence of Money through an agent based model===
Aleksandra, David, Jianfeng, Vikram

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===
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.

Complex Systems Summer School 2012-Photos

2012-06-24T01:29:43Z

Greb:

{{Complex Systems Summer School 2012}}

Feel free to share links to your photos here.

[http://www.flickr.com/photos/57132973@N07/7381727052/in/photostream/lightbox/ Tom tries to cut in]

[http://www.flickr.com/photos/57132973@N07/7381727234/in/photostream/lightbox/ Tom is rebuffed]

A photo of the transit of Venus across the Sun: [[Media:Venus-transit-2.jpg]]

[http://www.dropbox.com/gallery/1694302/1/CSSS2012?h=0d4e88 Some pictures]

[http://www.flickr.com/photos/sepehrehsani/7350419208/ Transit of Venus 2012]

[http://www.flickr.com/photos/sepehrehsani/7165200933/ Dr. Hübler's wave chaos experiment]

PHOTOS by Sanith

[https://plus.google.com/photos/115406882267732059257/albums/5755568736830137233?authkey=CKGi15SL_O_LMg 06/17/12 Taos ]

[https://plus.google.com/photos/115406882267732059257/albums/5754491294229358321?authkey=CNzp1fLU2o-B2gE 06/08/12 SFI ]

[https://www.dropbox.com/sh/twbymjcgkgqf7do/BFwDl5OyHv Friederike's pictures]

Complex Systems Summer School 2012-Tutorials

2012-06-19T14:19:52Z

Greb: /* Non-linear measures of correlation */

{{Complex Systems Summer School 2012}}

CSSS participants come from a wide range of disciplines. Participants are encouraged to share their knowledge by organizing their own tutorials.

Also, please post requests for tutorials here.

==Python online materials==
[Follow up to Ryan's tutorial..]

Here you have some useful online references for getting started in Python.

=== Google's Python Class ===
* A ''[...] free class for people with a little bit of programming experience who want to learn Python. The class includes written materials, lecture videos, and lots of code exercises to practice Python coding [...]''
* http://code.google.com/edu/languages/google-python-class/

=== Numpy, Scipy and Matplotlib tutorials ===
* I.e.: all the things you typically do in Matlab done in Python..
* NumPy tutorial: http://www.scipy.org/Tentative_NumPy_Tutorial
* Matplotlib tutorial: http://matplotlib.sourceforge.net/users/pyplot_tutorial.html
* Numpy for Matlab Users (extremely useful!!!): http://www.scipy.org/NumPy_for_Matlab_Users

=== NetworkX ===
* I.e.: network analysis in Python
* NetworkX tutorial: http://networkx.lanl.gov/tutorial/index.html

=== Enthought Python Distribution ===
* ''The Enthought Python Distribution provides scientists with a comprehensive set of tools to perform rigorous data analysis and visualization. Python, distinguished by its flexibility, coherence, and ease-of-use, is rapidly becoming the programming language of choice for researchers worldwide. EPD extends this capacity with a powerful collection of Python libraries to enable interactive technical computing and cross-platform rapid application development.''
* It is free (!!!): http://www.enthought.com/products/edudownload.php

=== Additional References ===
* Py4Science: a Starter Kit (by Fernando Perez, U.C. Berkeley)
* http://fperez.org/py4science/starter_kit.html

Hope this helps,

Matteo

==Non-linear measures of correlation==

I have been working on how to quantify the reciprocal interaction of time-series over time. I am using Recurrence Plots (http://www.recurrence-plot.tk/glance.php). If anybody is interested in discussing this method, I am willing to prepare a small tutorial on what recurrence plots are and how I have been using them.

Riccardo (fusaroli@gmail.com)

- Matteo

- Oleksandr krystoferivanov@gmail.com

- Priya

- Friederike

==Intro to Philosophy of Science==

Hi All, I've heard some interest in having a more structured/rigorous intro to ideas in the philosophy of science. I'd be happy to briefly explain some of the classic theories as well as some more recent views due to, e.g. Bas Van Fraassen, James Ladyman, Nancy Cartwright, and we could have a small (moderated!) group discussion. Sign up if interested... -Jasmeen

- Hide is interested and has a crush on Engels

- Friederike

- Matteo

- Vikram

- Mikkel

- Mark (!)

-Keegan is down

-Xiaoli

- Georg W.

- Priya

==Markov Chain Monte Carlo==
If anyone is interested in talking more about Bayesian methods and MCMC implementation, I'd be happy to put something together. - Keegan

-Hide is interested in this!

-Abby

-Joanne

-Oscar

-Vanessa

-Jasmeen

-Georg

-Nona

-benji

-Riccardo

-Matteo

- Priya

-Xiaoli

- Vikram

==Python, Computational Mechanics, and Information Theory==

There has been interest in more discussion on a number of topics, and so i'm offering to have evening discussions on them. please sign up below so that i can get a feel for the number of people who would be attending. also, please put a preference for what day it should be.

===Python===
Sign up below if you'd like an introduction to basic python programming. Python is a general purpose, very flexible and useful programming language. It is used pretty extensively in scientific computing.

dan wu: wu12345@gmail.com Let me know when we're meeting

- Benji: bzusman@gmail.com 

-Keegan keegan.hines@gmail.com

-Christa (maybe- I'm competent at the very basics, but could still use some help)

- Riccardo: fusaroli@gmail.com

- Oleksandr: krystoferivanov@gmail.com

- Nona: nona.karalashvili@gmail.com

- Xiaoli: xiaolidong2008@gmail.com

- Abby: Abbyhorn@Mit.edu

- Marco: maduenase@gmail.com

- Nick: goudemand at pim dot uzh dot ch

- Fabio: fabio.cresto-aleina@zmaw.de

- Joanne: joannerodrigues@berkeley.edu

- Hide: hi55 at cornell dot edu

- Priya: iitm.priya@gmail.com

- Miguel: miguel.lurgi@icm.csic.es

- Oscar: opatters@asu.edu

- Vanessa: vanferdi at gmail dot com

- Georg G: gmg at stat dot cmu dot edu dot notthelastpart

- Oleksandr: krystoferivanov@gmail.com

===Information Theory===
Interested in turning your data into bits, or seeing how the bits over there are related to the bits over here? If so, sign up below.

- Matteo

- Benji: bzusman@gmail.com

-Keegan keegan.hines@gmail.com

-Riccardo

-Christa

- Katrien

- Xiaoli

- Abby

- Jasmeen

- Hide

- Sanith

- Priya

- Georg W.

- Piotr

- Miguel

- Oscar

- Vanessa

- Nona

- Georg G.

- Oleksandr krystoferivanov@gmail.com

===Computational Mechanics===
If you'd like to know more about epsilon machines, measures of complexity, how to go from a map to a machine, i'm happy to discuss it all. 
- Matteo

Yes please! --Chloe

-Keegan keegan.hines@gmail.com

-Christa

-Xiaoli

-Jasmeen

-Hide

-Sanith

- Priya

- Georg W.

-Piotr

-Ian

- Miguel

- Oscar

- Abby

- Georg G.

- Riccardo.

==Order Book Dynamics: Learn how to trade in 15min==

--I'm happy to repeat this -just get in touch with me.--

If you are curious about how stocks trade and want to try your luck, I'll
be going over some of the basics with a hands-on example.

Meet at 7.30pm in main lecture hall Thursday June 7th. Please make sure
to bring your laptop.

Sanith

==Update==

Hi guys

I guess the main lecture hall is free at 6.30 pm and so we can meet there. I have a small talk through the idea and then maybe we can try out getting bifurcation plots for one or two systems. I use software written in MATLAB for the demo but the idea can be implemented in any software.

Here's a link to the [[software for numerical continuation|http://twr.cs.kuleuven.be//research/software/delay/notice.shtml]]. This software can handle systems with time delays and can be used to obtain the bifurcation behaviour.

(1) Please download the software DDE-BIFTOOL and unzip.

(2) Within the folder, you will find another zipped folder in small case ‘ddebiftool’. Please unzip this into a folder with the same name

(3) Add the location of the folder to the path of MATLAB.
I have also sent out a mail with a zipped folder containing files to get a bifurcation plot for a Rijke tube system.
Do let me know if anyone did not get this.
See you there!

Priya

==An easier way to get a bifurcation plot==

Hey guys
I have been working in the past in obtaining bifurcation plots for different physical systems. There's a better way to get these pictures instead of getting the evolution at every parameter value of interest. This is called ''numerical continuation'' and basically involves tracking a curve. I plan to give a informal talk on how to do this and maybe even a demo on applying this technique on 14th June at 6.30 pm. Do mail me if you are interested at '''iitm.priya@gmail.com''' or sign up below.
[[User:Priya|Priya]]

- [[Ryan James|Ryan]] is interested in this. 
- Riccardo is interested in this. 
- Vikram is interested in this. 
- Matteo is interested in this. 
- Hide is interested in this. 
- Katrien wants to hear more about this. 
- Cameron is interested in this and would like to see [http://itunes.apple.com/us/app/xpp/id433859546?mt=8 this] in action if anyone has an iPad. 
- Oscar is interested in this. 
- Charlie is interested in this. (I've done this once for a paper.) 
- Georg W. is interested in this 

==Using Tisean on R on OS X==
first install TISEAN, like you've done already. Make sure R is up to date (v 2.15).
you can try to install RTisean from CRAN
install.packages("RTisean"); library(RTisean); henon()
But me and Dave both got an error about some bad file name, something about con and something about a long path involving -Tmp-
Solution:
remove.packages("RTisean")
restart R
download this: http://cl.ly/0I0b2P2L311y1q0q0y0n
install it, it changes line 74 of nativeTISEAN.R which has some problems with file handling
If you are golden, then:
> henon()
V1 V2
[1,] -0.1232481 -1.030383

==A conceptual shell==

One thing that I think has been missing from this course is an explicit set of concepts and tools which we can use to relate all of the talks we've been listening to. Last fall, two other graduates students and I taught a survey course on complexity. We put together the following document, which contains one-paragraph summaries of what we felt were the 20 most important concepts that comprised the field of complexity. These were the "glue" that we used to relate all of our lectures and workshops. Most of these will probably be familiar to you, but I think they serve as a nice, concise reference and may be helpful in tying all of this information overload together. One caveat: These are works in progress and are in alphabetical rather than any logical conceptual order.

[[Media:Topics_in_Complexity_Foundational_Definitions.pdf]]

Cheers,
Mark Longo

Experiment sign-up

2012-06-17T21:02:28Z

Greb: /* 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:

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-Tutorials

2012-06-17T06:39:02Z

Greb: /* Intro to Philosophy of Science */

{{Complex Systems Summer School 2012}}

CSSS participants come from a wide range of disciplines. Participants are encouraged to share their knowledge by organizing their own tutorials.

Also, please post requests for tutorials here.

==Intro to Philosophy of Science==

Hi All, I've heard some interest in having a more structured/rigorous intro to ideas in the philosophy of science. I'd be happy to briefly explain some of the classic theories as well as some more recent views due to, e.g. Bas Van Fraassen, James Ladyman, Nancy Cartwright, and we could have a small (moderated!) group discussion. Sign up if interested... -Jasmeen

- Hide is interested and has a crush on Engels

- Friederike

==Markov Chain Monte Carlo==
If anyone is interested in talking more about Bayesian methods and MCMC implementation, I'd be happy to put something together. - Keegan

-Hide is interested in this!

-Abby

-Joanne

-Oscar

-Vanessa

-Jasmeen

-Georg

-Nona

-benji

==Python, Computational Mechanics, and Information Theory==

There has been interest in more discussion on a number of topics, and so i'm offering to have evening discussions on them. please sign up below so that i can get a feel for the number of people who would be attending. also, please put a preference for what day it should be.

===Python===
Sign up below if you'd like an introduction to basic python programming. Python is a general purpose, very flexible and useful programming language. It is used pretty extensively in scientific computing.

dan wu: wu12345@gmail.com Let me know when we're meeting

- Benji: bzusman@gmail.com 

-Keegan keegan.hines@gmail.com

-Christa (maybe- I'm competent at the very basics, but could still use some help)

- Riccardo: fusaroli@gmail.com

- Oleksandr: krystoferivanov@gmail.com

- Nona: nona.karalashvili@gmail.com

- Xiaoli: xiaolidong2008@gmail.com

- Abby: Abbyhorn@Mit.edu

- Marco: maduenase@gmail.com

- Nick: goudemand at pim dot uzh dot ch

- Fabio: fabio.cresto-aleina@zmaw.de

- Joanne: joannerodrigues@berkeley.edu

- Hide: hi55 at cornell dot edu

- Priya: iitm.priya@gmail.com

- Miguel: miguel.lurgi@icm.csic.es

- Oscar: opatters@asu.edu

- Vanessa: vanferdi at gmail dot com

- Georg G: gmg at stat dot cmu dot edu dot notthelastpart

===Information Theory===
Interested in turning your data into bits, or seeing how the bits over there are related to the bits over here? If so, sign up below.

- Matteo

- Benji: bzusman@gmail.com

-Keegan keegan.hines@gmail.com

-Riccardo

-Christa

- Katrien

- Xiaoli

- Abby

- Jasmeen

- Hide

- Sanith

- Priya

- Georg W.

- Piotr

- Miguel

- Oscar

- Vanessa

- Nona

- Georg G.

===Computational Mechanics===
If you'd like to know more about epsilon machines, measures of complexity, how to go from a map to a machine, i'm happy to discuss it all. 
- Matteo

Yes please! --Chloe

-Keegan keegan.hines@gmail.com

-Christa

-Xiaoli

-Jasmeen

-Hide

-Sanith

- Priya

- Georg W.

-Piotr

-Ian

- Miguel

- Oscar

- Abby

- Georg G.

==Order Book Dynamics: Learn how to trade in 15min==

--I'm happy to repeat this -just get in touch with me.--

If you are curious about how stocks trade and want to try your luck, I'll
be going over some of the basics with a hands-on example.

Meet at 7.30pm in main lecture hall Thursday June 7th. Please make sure
to bring your laptop.

Sanith

==Update==

Hi guys

I guess the mail lecture hall is free at 6.30 pm and so we can meet there. I have a small talk through the idea and then maybe we can try out getting bifurcation plots for one or two systems. I use software written in MATLAB for the demo but the idea can be implemented in any software.

Here's a link to the [[software for numerical continuation|http://twr.cs.kuleuven.be//research/software/delay/notice.shtml]]. This software can handle systems with time delays and can be used to obtain the bifurcation behaviour.

(1) Please download the software DDE-BIFTOOL and unzip.

(2) Within the folder, you will find another zipped folder in small case ‘ddebiftool’. Please unzip this into a folder with the same name

(3) Add the location of the folder to the path of MATLAB.
I have also sent out a mail with a zipped folder containing files to get a bifurcation plot for a Rijke tube system.
Do let me know if anyone did not get this.
See you there!

Priya

==An easier way to get a bifurcation plot==

Hey guys
I have been working in the past in obtaining bifurcation plots for different physical systems. There's a better way to get these pictures instead of getting the evolution at every parameter value of interest. This is called ''numerical continuation'' and basically involves tracking a curve. I plan to give a informal talk on how to do this and maybe even a demo on applying this technique on 14th June at 6.30 pm. Do mail me if you are interested at '''iitm.priya@gmail.com''' or sign up below.
[[User:Priya|Priya]]

- [[Ryan James|Ryan]] is interested in this. 
- Riccardo is interested in this. 
- Vikram is interested in this. 
- Matteo is interested in this. 
- Hide is interested in this. 
- Katrien wants to hear more about this. 
- Cameron is interested in this and would like to see [http://itunes.apple.com/us/app/xpp/id433859546?mt=8 this] in action if anyone has an iPad. 
- Oscar is interested in this. 
- Charlie is interested in this. (I've done this once for a paper.) 
- Georg W. is interested in this 

==Using Tisean on R on OS X==
first install TISEAN, like you've done already. Make sure R is up to date (v 2.15).
you can try to install RTisean from CRAN
install.packages("RTisean"); library(RTisean); henon()
But me and Dave both got an error about some bad file name, something about con and something about a long path involving -Tmp-
Solution:
remove.packages("RTisean")
restart R
download this: http://cl.ly/0I0b2P2L311y1q0q0y0n
install it, it changes line 74 of nativeTISEAN.R which has some problems with file handling
If you are golden, then:
> henon()
V1 V2
[1,] -0.1232481 -1.030383

Complex Systems Summer School 2012-Tutorials

2012-06-17T06:38:42Z

Greb: /* Intro to Philosophy of Science */

{{Complex Systems Summer School 2012}}

CSSS participants come from a wide range of disciplines. Participants are encouraged to share their knowledge by organizing their own tutorials.

Also, please post requests for tutorials here.

==Intro to Philosophy of Science==

Hi All, I've heard some interest in having a more structured/rigorous intro to ideas in the philosophy of science. I'd be happy to briefly explain some of the classic theories as well as some more recent views due to, e.g. Bas Van Fraassen, James Ladyman, Nancy Cartwright, and we could have a small (moderated!) group discussion. Sign up if interested... -Jasmeen

- Hide is interested and has a crush on Engels
- Friederike

==Markov Chain Monte Carlo==
If anyone is interested in talking more about Bayesian methods and MCMC implementation, I'd be happy to put something together. - Keegan

-Hide is interested in this!

-Abby

-Joanne

-Oscar

-Vanessa

-Jasmeen

-Georg

-Nona

-benji

==Python, Computational Mechanics, and Information Theory==

There has been interest in more discussion on a number of topics, and so i'm offering to have evening discussions on them. please sign up below so that i can get a feel for the number of people who would be attending. also, please put a preference for what day it should be.

===Python===
Sign up below if you'd like an introduction to basic python programming. Python is a general purpose, very flexible and useful programming language. It is used pretty extensively in scientific computing.

dan wu: wu12345@gmail.com Let me know when we're meeting

- Benji: bzusman@gmail.com 

-Keegan keegan.hines@gmail.com

-Christa (maybe- I'm competent at the very basics, but could still use some help)

- Riccardo: fusaroli@gmail.com

- Oleksandr: krystoferivanov@gmail.com

- Nona: nona.karalashvili@gmail.com

- Xiaoli: xiaolidong2008@gmail.com

- Abby: Abbyhorn@Mit.edu

- Marco: maduenase@gmail.com

- Nick: goudemand at pim dot uzh dot ch

- Fabio: fabio.cresto-aleina@zmaw.de

- Joanne: joannerodrigues@berkeley.edu

- Hide: hi55 at cornell dot edu

- Priya: iitm.priya@gmail.com

- Miguel: miguel.lurgi@icm.csic.es

- Oscar: opatters@asu.edu

- Vanessa: vanferdi at gmail dot com

- Georg G: gmg at stat dot cmu dot edu dot notthelastpart

===Information Theory===
Interested in turning your data into bits, or seeing how the bits over there are related to the bits over here? If so, sign up below.

- Matteo

- Benji: bzusman@gmail.com

-Keegan keegan.hines@gmail.com

-Riccardo

-Christa

- Katrien

- Xiaoli

- Abby

- Jasmeen

- Hide

- Sanith

- Priya

- Georg W.

- Piotr

- Miguel

- Oscar

- Vanessa

- Nona

- Georg G.

===Computational Mechanics===
If you'd like to know more about epsilon machines, measures of complexity, how to go from a map to a machine, i'm happy to discuss it all. 
- Matteo

Yes please! --Chloe

-Keegan keegan.hines@gmail.com

-Christa

-Xiaoli

-Jasmeen

-Hide

-Sanith

- Priya

- Georg W.

-Piotr

-Ian

- Miguel

- Oscar

- Abby

- Georg G.

==Order Book Dynamics: Learn how to trade in 15min==

--I'm happy to repeat this -just get in touch with me.--

If you are curious about how stocks trade and want to try your luck, I'll
be going over some of the basics with a hands-on example.

Meet at 7.30pm in main lecture hall Thursday June 7th. Please make sure
to bring your laptop.

Sanith

==Update==

Hi guys

I guess the mail lecture hall is free at 6.30 pm and so we can meet there. I have a small talk through the idea and then maybe we can try out getting bifurcation plots for one or two systems. I use software written in MATLAB for the demo but the idea can be implemented in any software.

Here's a link to the [[software for numerical continuation|http://twr.cs.kuleuven.be//research/software/delay/notice.shtml]]. This software can handle systems with time delays and can be used to obtain the bifurcation behaviour.

(1) Please download the software DDE-BIFTOOL and unzip.

(2) Within the folder, you will find another zipped folder in small case ‘ddebiftool’. Please unzip this into a folder with the same name

(3) Add the location of the folder to the path of MATLAB.
I have also sent out a mail with a zipped folder containing files to get a bifurcation plot for a Rijke tube system.
Do let me know if anyone did not get this.
See you there!

Priya

==An easier way to get a bifurcation plot==

Hey guys
I have been working in the past in obtaining bifurcation plots for different physical systems. There's a better way to get these pictures instead of getting the evolution at every parameter value of interest. This is called ''numerical continuation'' and basically involves tracking a curve. I plan to give a informal talk on how to do this and maybe even a demo on applying this technique on 14th June at 6.30 pm. Do mail me if you are interested at '''iitm.priya@gmail.com''' or sign up below.
[[User:Priya|Priya]]

- [[Ryan James|Ryan]] is interested in this. 
- Riccardo is interested in this. 
- Vikram is interested in this. 
- Matteo is interested in this. 
- Hide is interested in this. 
- Katrien wants to hear more about this. 
- Cameron is interested in this and would like to see [http://itunes.apple.com/us/app/xpp/id433859546?mt=8 this] in action if anyone has an iPad. 
- Oscar is interested in this. 
- Charlie is interested in this. (I've done this once for a paper.) 
- Georg W. is interested in this 

==Using Tisean on R on OS X==
first install TISEAN, like you've done already. Make sure R is up to date (v 2.15).
you can try to install RTisean from CRAN
install.packages("RTisean"); library(RTisean); henon()
But me and Dave both got an error about some bad file name, something about con and something about a long path involving -Tmp-
Solution:
remove.packages("RTisean")
restart R
download this: http://cl.ly/0I0b2P2L311y1q0q0y0n
install it, it changes line 74 of nativeTISEAN.R which has some problems with file handling
If you are golden, then:
> henon()
V1 V2
[1,] -0.1232481 -1.030383

Complex Systems Summer School 2012-Projects & Working Groups

2012-06-07T05:56:10Z

Greb: /* Rain-Cimate-Agriculture Interactions */

{{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 - General Meet-up ===
Attention anyone who is interested in cultural evolution or applying your models/methodologies to this fabulous topic!

Let's meet at 4:15 (June 5th) in the cafe during the first "Time to work on Projects" slot. A bunch of us coalesced there tonight and figured we should all properly meet up and then bud off into different projects. Please post your potential buds below:

=== 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 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.

=== 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

Bandelier Trip 2012

2012-06-07T05:42:15Z

Greb:

{{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

Friederike Greb

2012-06-05T04:26:59Z

Greb:

[[File:Friederikesmall.jpg|left]]

I work as a Post Doc at the chair of agricultural policy at Goettingen University. I studied mathematics (with philosophy as a minor) in Heidelberg, Santiago de Chile and Berlin, then analyzed exchange rates at the Inter-American Development Bank and tried to model air quality within a project on megacities of the German Helmholtz Association for a little bit, before enganging in my PhD research at the Courant Research Center "Poverty, Equity and Growth in Developing Countries" at Goettingen University. I am interested in all kinds of questions related to a sustainable development of the world, in particular understanding extreme poverty, the factors driving it, what we can do about it, global justice and our responsibility for suffering in faraway places.

My specific area of research is price transmission analysis. It looks at how price shocks are transmitted between various markets in different locations or between the world market and domestic markets, that is, for example, in which way recent price peaks for wheat or rice on the world market have affected people in developing countries. The current workhorse in this field is a type of time series model called threshold vector error correction model. The reasoning behind it is very intuitive when considering a pair of two markets, but -- at least to my mind -- does not appear appropriate when really these two markets form part of a larger network. Searching for a different set of tools to handle this extended setting is what got me interested in complex systems. This is completely new territory for me and I hope that during the course of this summer school I will be able to gain some understanding of this area of research and its potential applicability to price transmission analysis. Well, and really, it's more than just this, I think it is intriguing to study an approach that appears to be useful in so many different fields of science.

User:Greb

2012-06-05T04:24:15Z

Greb:

[[File:Friederikesmall.jpg|left]]

I work as a PostDoc at the chair of agricultural policy at Goettingen University, Germany. I studied mathematics (with philosophy as a minor) in Heidelberg, Santiago de Chile and Berlin, then analyzed exchange rates at the Inter-American Development Bank and tried to model air quality within a project on megacities of the German Helmholtz Association for a little bit, before enganging in my PhD research at the Courant Research Center "Poverty, Equity and Growth in Developing Countries" at Goettingen University. I am interested in all kinds of questions related to a sustainable development of the world, but in particular understanding extreme poverty, the factors driving it, what we can do about it, global justice and our responsibility for suffering in faraway places. My specific area of research is price transmission analysis. It looks at how price shocks are transmitted between various markets in different locations or between the world market and domestic markets, that is, for example, in which way recent price peaks for wheat or rice on the world market have affected people in developing countries. The current workhorse in this field is a type of time series model called threshold vector error correction model. The reasoning behind it is very intuitive when considering pairs of markets, but -- at least to my mind -- does not appear appropriate when really these markets form part of a larger network of spatially separated markets connected via trade. Searching for a different set of tools to handle this extended setting is what got me interested in complex systems. This is completely new territory for me and I hope that during the course of this summer school I will be able to gain some understanding of this area of research and its potential applicability to price transmission analysis. Well, and really, it's more than just this, I think it is intriguing to study an approach that appears to be useful in so many different fields of applications ..

User:Greb

2012-06-05T04:21:20Z

Greb:

[[File:Friederikesmall.jpg]]

I work as a PostDoc at the chair of agricultural policy at Goettingen University, Germany. I studied mathematics (with philosophy as a minor) in Heidelberg, Santiago de Chile and Berlin, then analyzed exchange rates at the Inter-American Development Bank and tried to model air quality within a project on megacities of the German Helmholtz Association for a little bit, before enganging in my PhD research at the Courant Research Center "Poverty, Equity and Growth in Developing Countries" at Goettingen University. I am interested in all kinds of questions related to a sustainable development of the world, but in particular understanding extreme poverty, the factors driving it, what we can do about it, global justice and our responsibility for suffering in faraway places.

My specific area of research is price transmission analysis. It looks at how price shocks are transmitted between various markets in different locations or between the world market and domestic markets, that is, for example, in which way recent price peaks for wheat or rice on the world market have affected people in developing countries. The current workhorse in this field is a type of time series model called threshold vector error correction model. The reasoning behind it is very intuitive when considering pairs of markets, but -- at least to my mind -- does not appear appropriate when really these markets form part of a larger network of spatially separated markets connected via trade. Searching for a different set of tools to handle this extended setting is what got me interested in complex systems. This is completely new territory for me and I hope that during the course of this summer school I will be able to gain some understanding of this area of research and its potential applicability to price transmission analysis. Well, and really, it's more than just this, I think it is intriguing to study an approach that appears to be useful in so many different fields of applications ..

File:Friederikesmall.jpg

2012-06-05T04:20:39Z

Greb:

Friederike Greb

2012-06-05T04:09:42Z

Greb:

I work as a Post Doc at the chair of agricultural policy at Goettingen University. I studied mathematics (with philosophy as a minor) in Heidelberg, Santiago de Chile and Berlin, then analyzed exchange rates at the Inter-American Development Bank and tried to model air quality within a project on megacities of the German Helmholtz Association for a little bit, before enganging in my PhD research at the Courant Research Center "Poverty, Equity and Growth in Developing Countries" at Goettingen University. I am interested in all kinds of questions related to a sustainable development of the world, in particular understanding extreme poverty, the factors driving it, what we can do about it, global justice and our responsibility for suffering in faraway places.

My specific area of research is price transmission analysis. It looks at how price shocks are transmitted between various markets in different locations or between the world market and domestic markets, that is, for example, in which way recent price peaks for wheat or rice on the world market have affected people in developing countries. The current workhorse in this field is a type of time series model called threshold vector error correction model. The reasoning behind it is very intuitive when considering a pair of two markets, but -- at least to my mind -- does not appear appropriate when really these two markets form part of a larger network. Searching for a different set of tools to handle this extended setting is what got me interested in complex systems. This is completely new territory for me and I hope that during the course of this summer school I will be able to gain some understanding of this area of research and its potential applicability to price transmission analysis. Well, and really, it's more than just this, I think it is intriguing to study an approach that appears to be useful in so many different fields of science.

Friederike Greb

2012-06-05T04:05:00Z

Greb:

[[File:Friederike.jpg|200px|left]]

I work as a Post Doc at the chair of agricultural policy at Goettingen University. I studied mathematics (with philosophy as a minor) in Heidelberg, Santiago de Chile and Berlin, then analyzed exchange rates at the Inter-American Development Bank and tried to model air quality within a project on megacities of the German Helmholtz Association for a little bit, before enganging in my PhD research at the Courant Research Center "Poverty, Equity and Growth in Developing Countries" at Goettingen University. I am interested in all kinds of questions related to a sustainable development of the world, in particular understanding extreme poverty, the factors driving it, what we can do about it, global justice and our responsibility for suffering in faraway places.

My specific area of research is price transmission analysis. It looks at how price shocks are transmitted between various markets in different locations or between the world market and domestic markets, that is, for example, in which way recent price peaks for wheat or rice on the world market have affected people in developing countries. The current workhorse in this field is a type of time series model called threshold vector error correction model. The reasoning behind it is very intuitive when considering a pair of two markets, but -- at least to my mind -- does not appear appropriate when really these two markets form part of a larger network. Searching for a different set of tools to handle this extended setting is what got me interested in complex systems. This is completely new territory for me and I hope that during the course of this summer school I will be able to gain some understanding of this area of research and its potential applicability to price transmission analysis. Well, and really, it's more than just this, I think it is intriguing to study an approach that appears to be useful in so many different fields of science.

Friederike Greb

2012-06-05T03:58:57Z

Greb:

File:Friederike.jpg

2012-06-05T03:42:39Z

Greb:

Friederike Greb

2012-06-05T03:40:39Z

Greb: Created page with 'I work as a PostDoc at the chair of agricultural policy at Goettingen University, Germany. I studied mathematics (with philosophy as a minor) in Heidelberg, Santiago de Chile and…'

I work as a PostDoc at the chair of agricultural policy at Goettingen University, Germany. I studied mathematics (with philosophy as a minor) in Heidelberg, Santiago de Chile and Berlin, then analyzed exchange rates at the Inter-American Development Bank and tried to model air quality within a project on megacities of the German Helmholtz Association for a little bit, before enganging in my PhD research at the Courant Research Center "Poverty, Equity and Growth in Developing Countries" at Goettingen University. I am interested in all kinds of questions related to a sustainable development of the world, but in particular understanding extreme poverty, the factors driving it, what we can do about it, global justice and our responsibility for suffering in faraway places.

My specific area of research is price transmission analysis. It looks at how price shocks are transmitted between various markets in different locations or between the world market and domestic markets, that is, for example, in which way recent price peaks for wheat or rice on the world market have affected people in developing countries. The current workhorse in this field is a type of time series model called threshold vector error correction model. The reasoning behind it is very intuitive when considering pairs of markets, but -- at least to my mind -- does not appear appropriate when really these markets form part of a larger network of spatially separated markets connected via trade. Searching for a different set of tools to handle this extended setting is what got me interested in complex systems. This is completely new territory for me and I hope that during the course of this summer school I will be able to gain some understanding of this area of research and its potential applicability to price transmission analysis. Well, and really, it's more than just this, I think it is intriguing to study an approach that appears to be useful in so many different fields of applications ..

User:Greb

2012-06-05T03:38:51Z

Alfred Hubler's Nonlinear Dynamics Lab 2012

2012-06-03T20:30:12Z

Greb: /* Thursday, June 7, 6:00pm */

{{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 
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==Friday, June 8 7:00am==
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==Monday, June 11, 6:00pm==
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