Dear Sheep,

It seems that this would be a very useful index for planning new
developments, or integrating developments into existing networks.  In a
way this is what we do intuitively at Space Syntax Limited; examining
the existing network structure and integrating new proposals
intelligently within this structure.  But a specific measure would be
interesting to calculate.

Best,
Noah





-----Original Message-----
From: Nick Dalton [mailto:[log in to unmask]] 
Sent: 25 November 2004 13:58
To: [log in to unmask]
Subject: Re: New paper in econophysics


If you read the abstract

'in particular the authors show that most of the considered networks
have a broad degree distribution typical of scale-free networks and
exhibit small-world properties as well.'

Your first reaction to this kind of result might be so-what. But this
would be premature.

Assume the hypothesis that syntactical graphs* are small-world systems
is true. We do know how to 'grow' small world systems to maintain the
small-world ness properties.

Would this imply we could then develop a method to take a current
graph/network make it 'grow'. Now we might not be able to grow the axial
line system but we could grow the network buried in the axial line
network.

This would mean that we could carry out configurational growth studies.
That is we could take a small settlement and grow it** using small-world
methods. While we could not see the expanding development we could see
the configurational effects it would have on the original urban grid.
It would be fun to project cities forward in time to see if small-world
type growth would inform us about how cities evolve.

just a thought

sheep




* ie realize this is not exactly they are saying.
** the graph of the city



>This paper has been submitted to E and P B
>
>Mike
>
>At 11:45 25/11/2004, Rui Carvalho wrote:
>>Dear All,
>>
>>I'd like to invite members of the mailbase to visit the econophysics 
>>web site, where a challenging paper is highlighted every day: 
>>http://www.unifr.ch/econophysics/
>>
>>The following paper has been recently flagged on the web site: Sergio 
>>Porta, Paolo Crucitti, Vito Latora "The Network Analysis of Urban 
>>Streets: A Dual Approach"
>>
>>Available at: http://xxx.lanl.gov/abs/cond-mat/0411241
>>
>>
>>
>>Kind regards,
>>Rui
>
>_____________________________________________________________
>
>Michael Batty, Director, Centre for Advanced Spatial Analysis (CASA), 
>at University College London, 1-19 Torrington Place, London, WC1E 6BT 
>UK _____________________________________________________________
>
>Tel 44 (0) 207 679 1781 Fax 44 (0) 207 813 2843 email [log in to unmask]
>
>The next CUPUM Conference is from June 29-July 1 2005, at CASA in UCL 
>see the web site www.cupum.org. CASA pages are at www.casa.ucl.ac.uk