l :‘l lilli‘l‘l’l’iB

 
 
  

    
  
 

A?
fillllllb‘?

   

mun: LS

1HE saw 1:"le BALL or EARYH‘

only lwo our mollelr male W lne amid Eil'l is ilelsclably nunei
lliall, allmiinan in. uilui alone in nsaiilie pom ulll whtn lbe
{annenK vie il-arrenblea we nave all. uilal common and one
you sea

 

 

 

diderence has a moie or less well delined BOUNDARY
CONDITION, surlace. or inicrlaee io oiner media or
sysieins, Permacullilie iisell acis as a iranslaiorbecween
niauy disciplines, and brings luuelbcr lonriaiion lioin
several nus ll can be described as a lramework or
panean inlo whlth many lorms ol knowlcdgd aie filled
in ielaiion lo eacli ellier rerrnaciilnire is a synlliesisol
dllleienldrsciplines.

Any sucli boundary is al nines beiween, al limes
melon, media, and las in ilie ruse ol ilie eanii/arr
surlacol cliese boundaries, surlaccs, or perceplible
dllknnczs preseni a place lor "fins; lo happen. lor
menu in loealc nius, boundaries presenl an upper
lunlry lor us lo ylnv a lranslalory elenienl in a design,
or lo dclorm me surlaee (or speciiic now or irarirlalion
lo m

ll lbe niedla me in gasmus or liquid lorm, be com
posed ol mobile panioles Ink: a mwd ol people, swarin
ol llies, waler, or dusl elovds, ilien ine media are
lbemselves capable ol new and delorinailon

ln naiiiie, many sucli media and boundaries ean be
disringiiislied. As one example. a pond (Willi pan ol iis
mars llssliown in figure 4.5.

Amnngh dilleienlly named lei nal named ai alll, all
m surlaees, edges, and boundaries separale dikml
media, xologial assemblies, pbyslcal slaies, or flow
condi ons Every boundary lias a unique beliaviour
and a lranslalion poieiiiial. Living lrauslalois llrees,
lisli, mulluscs, waier scridersl live ai lad! and every

 

76

boundary We oan see ibai the eslablislimeiii 0! complex
boundary cond ons is anoilier primary s|n|egy lor
ggnL-uhng compler lile assemblies and energy
iranslalors

'Mnsl bmlnglfls,“ lsays Vugel, lssll seem co nave
boaid oi me boundary layer, buc lney nave a liizay
nurmn dial ii is a discreie iegiori. ralber lbaii cbe dis
creic nocion ibai a may region

 

W
m clnmm ol oornolax boundary oondiliona is a basic
dasipn sllalaoy lol crla1IM spalial and lonipoial nionas.

4 5
BOUNDARY CO DITIONS

boundaries are commonplace in nalure Media are
variously Ilquld. gaseous, or solid, in various siaies 0!
flow or movemcui, rliey liave very dillereni inliereni
cbaraclcriscies, sucli as relaiirely boiler, more acid.
mgh, liaider, mun: absurbeni, less pedoraied, darker,
and so on Ever. in absiracc lerina, sceieiy divi es iiaell
in ierms at sex, age, eulliire, language, beliel,
disciplines, and colour liusi lo enumerale a lew
perceived dlllemnus)

ln iliis contusion o: del ons. social and physirfl,
we can make one sialemenl wnh cerlainiy People
diseriminale lin ils irue meaning, ol demiinp a
dl/‘femlm belween a yeal many media or sysiems, and
inerelore recogulse boundary condilions or “sons",
enabling llieiu io delme liice and unlike maierials or
gmups in ierins ola lays: numberolspeoilic cruel-la,

Dillerenm, wlienier in nalure or socleiy, sei up a
pocenlial STRE§ coNDmDN This may demonsliaie
iisclias media boundary drsnirbances, lmlmn, sliear, or
liiibulence caused by movemenl, someiinies inolcnl
ciiemical reanions, powerful diliiision loiees, or social
disrupllon Seldom do lwo dillereiii syscems come ln
tomafl Wl|h0|l| a boundary reaelion ol one son or
anallier, as ouiei as rusi, as noisy as poliiieal dobale, or
as leilial as war

II we concenlraie our ailenlior. on ibe boundary
condiiion, lbeie are, crudely, lwo common or possible
molions or parllele flows—ALONG or ACKOSS
boundaries In longilildlnal flaws lsliear linesi berween
media, dellecdons and mabulence may be caused by
Jon] lridion or die more cosmic Curlolus lspiiil lone
ln crossing a boundary belwecn me a. ilie surln'et
ibeiriselves may iesisl invaders (:meal or social); or
various nusv sieves, or criieria may have io be
lay—passed by a poleniial invader

However, iliese boundaries are, in naiuie, ollen very
neli places lor orgimsms co locmz, lor al leasi lbcse
reasons

- Panicles may iiaiorally fitmmulak mdzpwfl (he'll
lllie boundary lisell acls as a nei or blockadel

i SPQQaI or umqfll Inches are available in space or
nine miliin ibe boundary aiea "Self