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Nature's patterns : a tapestry in three parts : Branches (2009)

by Philip Ball

Other authors: See the other authors section.

Series: Nature's Patterns (book 3)

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1281214,314 (3.77)None
As part of a trilogy of books exploring the science of patterns in nature, acclaimed science writer Philip Ball here looks at the form and growth of branching networks in the natural world, and what we can learn from them. Many patterns in nature show a branching form - trees, river deltas, blood vessels, lightning, the cracks that form in the glazing of pots. These networks share a peculiar geometry, finding a compromise between disorder and determinism, though some, like the hexagonal snowflake or the stones of the Devil's Causeway fall into a rigidly ordered structure. Branching networks are.… (more)
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Indeholder "Preface and acknowledgements", "1. A Winter's Tale - The six-pointed snowflake", "2. Tenuous Monsters - Shapes between dimensions", "3. Just for The Crack - Clean breaks and ragged ruptures", "4. Water Ways - Labyrinths in the landscape", "5. Tree and Leaf - Branches in biology", "6. Web Worlds - Why we're all in this together", "Epilogue: The Threads of the Tapestry - Principles of pattern", "Appendix", "Bibliography", "Index".

"Preface and acknowledgements" handler lidt om hans tidligere bog og om hvorfor den i anden omgang blev til denne trilogi i stedet for bare et genoptryk.
"1. A Winter's Tale" handler om snefnug og hvorfor de er seksfoldigt symmertriske. Det viser sig at vandmolekylers forkærlighed for at pakke som regulære sekskanter kan slå igennem på makroskopisk plan ved at gøre nogle positioner lidt mere sandsynlige end andre.
"2. Tenuous Monsters" handler om fraktale former og DLA = Diffusion-Limited Aggregation, bakterievækst og byvækst.
"3. Just for The Crack" handler om revnedannelser og The Gigant's Causeway i Irland og Fingal's Cave i Skotland. De to sidste er nogle stort set lodrette søjler med tæt på sekskantet tværsnit, men naturligt opstået og forskerne kan lave samme fænomen med kartoffelstivelse, selv om det ser meget unaturligt ud at der pludselig står en masse lodrette sekskantede søjler i vandkanten et sted i Irland. Der nævnes en del sjove computermodeller, men uden detaljer.
Side 59 Jim Cowan har kun hån til overs for folk som ser en simpel computer model og straks tror at den forklarer alt.
Elektriske udladninger og computermodeller for samme, størknende mudderlag, keramisk glasur med revner og gader i en by.
"4. Water Ways" handler om floder, perkolation, snoede floder og erosion. En ordentlig model for kysterosion er så ny som 2004. iserosion styret af sollys kan give spidser kaldet penitentes.
"5. Tree and Leaf" handler om træer, blodårer og potenslove for hjerteslag, stofskifte, vægt, højde og diameter for planter og dyr.
"6. Web Worlds" handler om tilfældige grafer, Erdös, Kevin Bacon, epidemier, HIV.
"Epilogue: The Threads of the Tapestry" handler om en opsummering, der advarer mod for megen opsummering.

Udmærket bog, der giver lyst til at kigge nærmere på mange ting, fx side 191 hvor spiraler og målskiver begge er tilladte i en given model for konvektionsceller. ( )
  bnielsen | Jul 16, 2012 |
no reviews | add a review

» Add other authors

Author nameRoleType of authorWork?Status
Ball, PhilipAuthorprimary authorall editionsconfirmed
Gipstein, ToddCover photographsecondary authorsome editionsconfirmed

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As part of a trilogy of books exploring the science of patterns in nature, acclaimed science writer Philip Ball here looks at the form and growth of branching networks in the natural world, and what we can learn from them. Many patterns in nature show a branching form - trees, river deltas, blood vessels, lightning, the cracks that form in the glazing of pots. These networks share a peculiar geometry, finding a compromise between disorder and determinism, though some, like the hexagonal snowflake or the stones of the Devil's Causeway fall into a rigidly ordered structure. Branching networks are.

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