Igors weblog

Link: http://wiki.tudelft.nl/bin/view/Education/SPM955xABMofCAS/WebHome

Our human society consists of many intertwined Large Scale Socio-Technical Systems (LSSTS), such as infrastructures, industrial networks, the financial systems etc. Environmental pressures created by these systems on Earth’s carrying capacity are leading to exhaustion of natural resources, loss of habitats and biodiversity, and are causing a resource and climate crisis. To avoid this sustainability crisis, we urgently need to transform our production and consumption patterns. Given that we, as inhabitants of this planet, are part of a complex and integrated global system where and how should we begin this transformation? And how can we also ensure that our transformation efforts will lead to a sustainable world?
LSSTS and the ecosystems that they are embedded in are known to be Complex Adaptive Systems (CAS). According to John Holland CAS are "...a dynamic network of many agents (which may represent cells, species, individuals, firms, nations) acting in parallel, constantly acting and reacting to what the other agents are doing. The control of a CAS tends to be highly dispersed and decentralized. If there is to be any coherent behavior in the system, it will have to to arise from competition and cooperation among the agents themselves. The overall behavior of the system is the result of a huge number of decisions made every moment" by many individual agents.
Understanding Complex Adaptive Systems requires tools that themselves are complex to create and understand. Shalizi defines Agent Based Modeling as "An agent is a persistent thing which has some state we find worth representing, and which interacts with other agents, mutually modifying each other’s states. The components of an agent-based model are a collection of agents and their states, the rules governing the interactions of the agents and the environment within which they live."
This course will explore the theory of CAS and their main properties. It will also teach you how to, (in the basics course SPM 9550) work with Agent Based Models in order to understand CAS, and (in the advanced course SPM9555) how to set them up independently.
This course provides an excelent addition to the courses already given during MSc programs in that it enables complexity to be studied in a simulation environment. Also students from other faculties are encouraged to expand their knowledge on this subject. Course goals are :

1. Students should know the definitions of CAS properties, as listed in the course topics
2. Students should be able to identify relevant properties of a system and determine whether or not the system can be classified as CAS.
3. Students should be able to create a coherent description of a system from both top down and bottom up
4. Students should be able to understand and modify Agent Based Simulations of CAS in NetLogo
5. Students should be able to reflect on the traditional engineering systems thinking from the CAS perspective and understand the implications of changing the traditional perspective.

Read more about it on the wiki

Link: http://www.youtube.com/watch?v=XGK84Poeynk

So,the hippes got it right in the sixties... ---

If you ever tried being dragged around a beach by a powerkite, your feet firmly ploughing the sand, you will also wonder whether there is a better way. As it turns out there is. Introducing: WokKiting ! Step 1 is going out to the Chinese supermarket and getting the biggest wok you can find. In this case it is a a 28 inch, or 71 cm one. Taking it to the beach proved out to be and entirely different challenge. Once there, step 2 is to stand in the wok. Conditions, windforce 5 ! Step 3, steer the kite into the powerzone, and hope you stay in. It is surprisingly difficult. Getting the balance right is tricky as the kite is pulling at your shoulders, pivoting you out of the wok. Most likely this would be much more easy with a seat harness. Furthermore, it is almost impossible to steer, you go wherever the kite takes you. Also, the edges of the wok are VERY sharp, as my ankles have found out... I will add some edge protection and a set of foot bindings and try again...

Having fun at the beach with windforce 5. Kite is a Hornet 3.0 that pulls like a horse with such winds.

Link: http://somafm.com/play/suburbsofgoa

Soma FM has a new and wonderful station of world music :

Chillout with Suburbs Of Goa on SomaFM, commercial-free, independent, alternative/undeground internet radio

Here is a movie Chris Davis and me made visualizing the evolution of wiki.tudelft.nl from the very beginning, 5 years ago. Each node is a page, links are connections between pages. Graph is laid out using a force-directed algorithm, where the edges (links between pages) pull the nodes (pages) together, and the nodes (pages) repel each other. This means that the more tightly connected nodes will be closer together than weakly connected ones, which are pushed to the outside. The entire thing is created using Prefuse (http://prefuse.org/), wiki is using the TWiki engine (http://twiki.org). The soundtrack is from DJ Cary's Eastern Grooves compilation from Magnatune.com. Licensed under Creative Commons http://creativecommons.org/licenses/by-nc-sa/3.0/

This is the first post on the new blog, after the old was retired.