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reply: Rivers, blood and transportation networks

Author

Listed:
  • Jayanth R. Banavar

    (104 Davey Laboratory, Pennsylvania State University University Park)

  • Amos Maritan

    (International School for Advanced Studies, Via Beirut 2-4, 34014 Trieste, and INFM and the Abdus Salam International Center for Theoretical Physics)

  • Andrea Rinaldo

    (Universita' di Padova)

Abstract

The idea behind our theorem1 is simple. It can be illustrated by using airline travel as an example. Consider a stream of people (blood) leaving London (heart) at a steady rate and fanning out to all parts of the world (body). The number of people leaving London each day and arriving elsewhere at their final destinations (metabolic rate) is denoted by B. Assuming that the people travel along a locally connected network and that the transit time for each local hop is the same (say, 1 day), the number of people in transit at any given time (blood volume) is proportional to B, but with a proportionality constant that is given by the mean number of hops from all the destination cities to London.

Suggested Citation

  • Jayanth R. Banavar & Amos Maritan & Andrea Rinaldo, 2000. "reply: Rivers, blood and transportation networks," Nature, Nature, vol. 408(6809), pages 160-160, November.
    • Handle: RePEc:nat:nature:v:408:y:2000:i:6809:d:10.1038_35041635
    DOI: 10.1038/35041635
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