149 lines
4.3 KiB
Plaintext
149 lines
4.3 KiB
Plaintext
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l :‘l lilli‘l‘l’l’iB
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A?
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fillllllb‘?
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mun: LS
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1HE saw 1:"le BALL or EARYH‘
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only lwo our mollelr male W lne amid Eil'l is ilelsclably nunei
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lliall, allmiinan in. uilui alone in nsaiilie pom ulll whtn lbe
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{annenK vie il-arrenblea we nave all. uilal common and one
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you sea
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diderence has a moie or less well delined BOUNDARY
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CONDITION, surlace. or inicrlaee io oiner media or
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sysieins, Permacullilie iisell acis as a iranslaiorbecween
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niauy disciplines, and brings luuelbcr lonriaiion lioin
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several nus ll can be described as a lramework or
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panean inlo whlth many lorms ol knowlcdgd aie filled
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in ielaiion lo eacli ellier rerrnaciilnire is a synlliesisol
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dllleienldrsciplines.
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Any sucli boundary is al nines beiween, al limes
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melon, media, and las in ilie ruse ol ilie eanii/arr
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surlacol cliese boundaries, surlaccs, or perceplible
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dllknnczs preseni a place lor "fins; lo happen. lor
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menu in loealc nius, boundaries presenl an upper
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lunlry lor us lo ylnv a lranslalory elenienl in a design,
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or lo dclorm me surlaee (or speciiic now or irarirlalion
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lo m
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ll lbe niedla me in gasmus or liquid lorm, be com
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posed ol mobile panioles Ink: a mwd ol people, swarin
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ol llies, waler, or dusl elovds, ilien ine media are
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lbemselves capable ol new and delorinailon
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ln naiiiie, many sucli media and boundaries ean be
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disringiiislied. As one example. a pond (Willi pan ol iis
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mars llssliown in figure 4.5.
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Amnngh dilleienlly named lei nal named ai alll, all
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m surlaees, edges, and boundaries separale dikml
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media, xologial assemblies, pbyslcal slaies, or flow
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condi ons Every boundary lias a unique beliaviour
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and a lranslalion poieiiiial. Living lrauslalois llrees,
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lisli, mulluscs, waier scridersl live ai lad! and every
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76
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boundary We oan see ibai the eslablislimeiii 0! complex
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boundary cond ons is anoilier primary s|n|egy lor
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ggnL-uhng compler lile assemblies and energy
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iranslalors
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'Mnsl bmlnglfls,“ lsays Vugel, lssll seem co nave
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boaid oi me boundary layer, buc lney nave a liizay
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nurmn dial ii is a discreie iegiori. ralber lbaii cbe dis
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creic nocion ibai a may region
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W
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m clnmm ol oornolax boundary oondiliona is a basic
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dasipn sllalaoy lol crla1IM spalial and lonipoial nionas.
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4 5
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BOUNDARY CO DITIONS
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boundaries are commonplace in nalure Media are
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variously Ilquld. gaseous, or solid, in various siaies 0!
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flow or movemcui, rliey liave very dillereni inliereni
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cbaraclcriscies, sucli as relaiirely boiler, more acid.
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mgh, liaider, mun: absurbeni, less pedoraied, darker,
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and so on Ever. in absiracc lerina, sceieiy divi es iiaell
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in ierms at sex, age, eulliire, language, beliel,
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disciplines, and colour liusi lo enumerale a lew
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perceived dlllemnus)
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ln iliis contusion o: del ons. social and physirfl,
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we can make one sialemenl wnh cerlainiy People
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diseriminale lin ils irue meaning, ol demiinp a
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dl/‘femlm belween a yeal many media or sysiems, and
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inerelore recogulse boundary condilions or “sons",
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enabling llieiu io delme liice and unlike maierials or
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gmups in ierins ola lays: numberolspeoilic cruel-la,
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Dillerenm, wlienier in nalure or socleiy, sei up a
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pocenlial STRE§ coNDmDN This may demonsliaie
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iisclias media boundary drsnirbances, lmlmn, sliear, or
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liiibulence caused by movemenl, someiinies inolcnl
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ciiemical reanions, powerful diliiision loiees, or social
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disrupllon Seldom do lwo dillereiii syscems come ln
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tomafl Wl|h0|l| a boundary reaelion ol one son or
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anallier, as ouiei as rusi, as noisy as poliiieal dobale, or
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as leilial as war
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II we concenlraie our ailenlior. on ibe boundary
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condiiion, lbeie are, crudely, lwo common or possible
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molions or parllele flows—ALONG or ACKOSS
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boundaries In longilildlnal flaws lsliear linesi berween
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media, dellecdons and mabulence may be caused by
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Jon] lridion or die more cosmic Curlolus lspiiil lone
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ln crossing a boundary belwecn me a. ilie surln'et
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ibeiriselves may iesisl invaders (:meal or social); or
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various nusv sieves, or criieria may have io be
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lay—passed by a poleniial invader
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However, iliese boundaries are, in naiuie, ollen very
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neli places lor orgimsms co locmz, lor al leasi lbcse
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reasons
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- Panicles may iiaiorally fitmmulak mdzpwfl (he'll
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lllie boundary lisell acls as a nei or blockadel
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i SPQQaI or umqfll Inches are available in space or
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nine miliin ibe boundary aiea "Self
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