Chart of the Day

(via Indexed)

Assorted Links (overloaded edition)

1. Darkened Shanghai
   
   
2. One of the new big question marks for economic demographers
   
   
3. Latin America has more mobile phones than people, seriously!?
   
   
4. Observations on US Urbanization: 1920-2010
   
   
5. How much do teachers cost? (via Drunkeynesian)
   
   
6. Two Research Fellowship positions in Demography at Oxford
   
   
7. Self-recommending -  Tracking the Wider Impacts of the São Paulo Subway System
   
   
8. Call of dutty, or how far can a coutry go to promote fertility
   
   
9. An excellent advice for young researchers
   
   
10. Compare Global Cities on your iPad
    
    
11. U.S. Life Expectancy Map: The Gender Gap (via @Demografia_CSIC)

Quote of the Day

"People don't think the right way. You should be happy of getting old because the alternative is not being younger, it's being dead!"

(Hans Rosling)

The Geometry of Sound Visualized

Turn down your speakers … but not all of the way off. Now see what sound waves look like when they’re visualized and the geometric patterns they make. A little bit of history here.

(via Open culture)

Low frequency part (at 0:40) reminds me of this fried egg city, and high frequency part (at 1:52) reminds me of Christaller's network of central places. Probably, there is already an author using complexity theory to freak out on this stuff.


Related Link:

• Amazing Water & Sound Experiment

Music for the Weekend

Assorted Links on Segregation

1. The effect of segregation on economic growth
   
   
2. Global and local spatial indices of urban segregation
   
   
3. Some Notes on Schelling's Essay "On Letting a Computer Help with the Work
   
   
4. Countering urban segregation in Brazilian cities: policy-oriented explorations using agent-based simulation
   
   
5. The other great contribution of Thomas Schelling (that gave him the 2005 Nobel Prize)
   
   
6. Urban segregation as a complex system: an agent-based simulation approach (by Flavia Feitosa)
   
   
7. Interactive maps: How Racial Segregation Changed from 1970 to 2010 in the US ?

A spreadsheet to calculate congestion charge

For those interested in transport modelling and congestion pricing, here is a piece in Wired about Komanoff 's spreadsheet to calculate congestion charge. He has been working for three years now on the Balanced Transportation Analyzer, an Excel spreadsheet proposed to model every aspect of New York City transportation (I thank Fabio Storino for the pointer).

And here is a 15-minute video where Komanoff explains the whole idea of the project.

The spreadsheet is quite impressive as for the amount of input data it demands. However, I'm not familiarized with transport modelling, so I'm in no position to have an opinion on this spreadsheet. I'd rahter have some experts' opinions published in scientific journal assessing it.

ps. I confess though I asked myself: why 'Excel' ?!  This is too vintage.

Urban Picture

Hong Kong, by Romain Jacquet-Lagrèze.