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The CASA Blog Network

The latest outputs from researchers, alumni and friends at the UCL Centre for Advanced Spatial Analysis (CASA).

    The CASA Blog Network

    Category: Flows, Fluxes

    The Network City

    Posted on Monday 21 October 2013 by Michael Batty

    Michael Mehaffy and Nikos Salingaros have written a nice paper on networks which is the online journal Biourbanism. They quote from E. Forster who made much in  stories of the fact that we need to ‘connect’. His novella The Machine … Continue reading →

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    Flows, Fluxes, networks, Urban Dynamics

    More on Urban Science

    Posted on Sunday 24 March 2013 by Michael Batty

    Social physics, scaling, urban informatics, energy in cities are all elements of a science of cities. The recent article by Solecki, Seto, and Marcotullio ‘It’s Time for an Urbanization Science’ in the magazine Environment develops yet another notion of what … Continue reading →

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    Allometry, Complex Systems, emergence, Flows, Fluxes, Scaling

    Towards a Science of Cities

    Posted on Saturday 16 February 2013 by Michael Batty

    In 1999, Jeff Kenworthy & colleagues (Laube & Zeibots) published a paper entitled “Towards a Science of Cities“. Jeff recently drew my attention to this and I post it here as it is key to many indicators of city structure … Continue reading →

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    Allometry, Biology, Flows, Fluxes, location, Morphology, Transport

    CAMUSS: Cellular Automata Modelling for Urban Spatial Systems

    Posted on Thursday 8 November 2012 by Michael Batty

    This interesting meeting is being held in Oporto, Portugal and involves a reassessment of progress and problems in this field of simulation. I am giving the keynote at 2-30pm November 8th -19th and the pdf of my power point can … Continue reading →

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    Cellular Automata, Complex Systems, emergence, Flows, Fluxes, Simulation, Urban (LUTI) Models

    Complexity, Waste, Cities

    Posted on Tuesday 3 July 2012 by Michael Batty

    Singapore World Cities Summit, Singapore WasteMetAsia sessions, today. Talking on how complexity theory can be used to think about waste in cities – of course it can be used to think about anything in cities, but here are some improvised … Continue reading →

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    Allometry, Complex Systems, energy, Flows, Fluxes, Transport

    The Laws of the City

    Posted on Thursday 21 June 2012 by Michael Batty

    A deluge of data makes cities laboratories for those seeking to run them better. Nice summary from Ludwig Siegele in this week’s Economist, online version I think. Merging smart cities and new scaling laws. And reference to the forthcoming meeting … Continue reading →

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    Allometry, Complex Systems, Flows, Fluxes, networks, Smart Cities, Transport

    Crowds, Congestion and Extreme Events

    Posted on Saturday 16 June 2012 by Michael Batty

    My talk at CPGIS this morning is about how we might use all our new flow data to build new models to explore how city systems fail. This is more a talk about what we would like to do, rather … Continue reading →

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    Allometry, Complex Systems, Flows, Fluxes, networks, Tipping Points

    Financial Footprints: Transactions in Real Time

    Posted on Saturday 28 April 2012 by Michael Batty

    Material and people flows in cities show atoms are bonded together but money and information flows have much greater resonance. The great challenge is not only to build good economic flow models but first to observe and measure them. Pioneering … Continue reading →

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    Animations, Flows, Fluxes, networks, Urban Dynamics

    Flows Binding People Together in London

    Posted on Wednesday 18 April 2012 by Michael Batty

    Joan Serras in CASA is visualising some excellent flow data on the use of 114,000 pubic buses in London over a 24 hour period. Watch his previous Vimeo clip. Soon we will post Jon Reades visulizations of flows on subways … Continue reading →

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    Animations, Flows, Fluxes, networks, Transport

    Spatial Interaction

    Posted on Friday 20 January 2012 by Michael Batty

    Nothing like a lecture course to force you to publish digital copies of what one has written. Retrieved a 2 page article, more an entry, on spatial interaction from the Encyclopaedia of Geographic Information Science edited by Karen Kemp, Sage, … Continue reading →

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    Flows, Fluxes, location, SpatialInteraction, Urban (LUTI) Models

    Simulating Infectious Diseases in Large Cities

    Posted on Thursday 19 January 2012 by Michael Batty

    We published quite a high profile paper this week in The Lancet Infectious Diseases. Anders Johansson, myself and colleagues wrote a speculative paper on how to generalise the dynamics of SIR (spatial epidemics) models from pedestrian crowding models as part … Continue reading →

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    Agent Based Models, Biology, Flows, Fluxes, Simulation

    Visualising the Flow of Debt

    Posted on Saturday 19 November 2011 by Michael Batty

    Topical visualisations of flows: so simple, so effective. How we can visualise the flow of debt in the west between countries by the BBC  and even better by the New York Times which introduces scenarios about future flows, reflecting contagion, phase … Continue reading →

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    design, Flows, Fluxes, networks, SpatialInteraction

    BitCity

    Posted on Thursday 3 November 2011 by Michael Batty

    BitCity tomorrow (3rd November) at Columbia (NYC). Click left for my presentation on Cities as Flow Systems. Talks about CASA’s Oyster Card, Bikes, Networks, and LUTI model projects and how they can be used to look at fractured networks. Thanks … Continue reading →

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    Flows, Fluxes, networks, Smart Cities, Transport

    Ravenstein’s Flow Map

    Posted on Saturday 29 October 2011 by Michael Batty

    Amazing what you discover when you search the web. Couldn’t find Ravenstein’s 1888 map that Waldo Tobler sent me as a detailed scan. Its framed in my room at UCL and somewhere on the web I know. What I did … Continue reading →

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    Flows, Fluxes, location, networks, SpatialInteraction

    Ranks of Flows: Network Scaling

    Posted on Sunday 7 August 2011 by Michael Batty

    The TfL Oyster Card Tube and Train flow volumes over 24 hrs at 666 (don’t worry about the number) hubs reveal classic diurnal peaks but the profiles are far from power laws. If anything, they are lognormal. Watch the Vimeo Clip. … Continue reading →

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    Flows, Fluxes, networks, Social Physics, Transport

    Flux by Broken Cities

    Posted on Friday 5 August 2011 by Michael Batty

    Bit of an experiment really as it is the weekend. Thought I would embed some background music into the website and the album Flux from the indie group Broken Cities reflects the themes of a Science of Cities. And the … Continue reading →

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    Flows, Fluxes, Sounds of Cities

    The Heartbeat of the City

    Posted on Tuesday 2 August 2011 by Michael Batty

    Inspired by Victor Gruen’s heart of the city posted here a little while ago, Jon Reade’s 24 hour movie of traffic on London’s railways (tube+overground) moves us a little closer to Leonardo’s analogy of the city as body. More biology perhaps … Continue reading →

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    Biology, Flows, Fluxes, networks, Transport

    The Oldest Flow Map

    Posted on Monday 27 June 2011 by Michael Batty

    …. according to the great cartographer Arthur Robinson, the two maps of traffic between Dublin and the rest of Ireland by Lt. Harness of the British Army in 1837, are the oldest. Mapped for the Irish Railway Commissioners prior to … Continue reading →

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    Flows, Fluxes, Transport

    Visualising Fast Flows

    Posted on Saturday 25 June 2011 by Michael Batty

    Aaron Koblin has produced some fantastic animations of airline flows reminiscent of some of Joan Serras’ work on our SIMULACRA blog. Check out Aaron’s flow stuff. He uses Google Maps to zoom in and out. Also dig into his web … Continue reading →

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    Computer Graphics, Flows, Fluxes

    Movements from Point Data

    Posted on Tuesday 21 June 2011 by Michael Batty

    Constructing flows from where people are located at different points in time is usually hard and often impossible for large populations. You can only do it for individuals if you know the actual locations and order visited: posted on vimeo, … Continue reading →

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    Flows, Fluxes, location, networks

    Cities as Biologies

    Posted on Sunday 19 June 2011 by jmichaelbatty

    The analogy between the city and the human body goes back to Leonardo. The heart of the city, said Victor Gruen, pumps its people as flows of traffic to keep it energized as an exchange mechanism. Great visualization of the … Continue reading →

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    Flows, Fluxes, Morphology

    The Social Physics of Movement

    Posted on Tuesday 14 June 2011 by jmichaelbatty

    Anil Bawa-Cavia, on CASA’s SCALE project, is researching data from the social networking site FourSquare. At the PURBA last week, he won the prize for the best doctoral paper. Read it. Full-text PDF size: 688 Kb.

    Filed under: Flows, Fluxes …

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    Flows, Fluxes

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