cusp · threshold
a parameter whose window overlaps with another, where the crossing leads into the second rather than ending the first
Examples
- In 2007, the Arctic sea ice extent dropped below 4.2 million km², crossing a threshold scientists now associate with irreversible summer melt trends. climate
- The Therac-25 radiation therapy machine allowed parameter drift in beam intensity until a software threshold was crossed, delivering lethal doses. engineering
- Bitcoin’s block reward halving in May 2020 crossed a profitability threshold, triggering a shift in mining pool dominance from China to Central Asia. economics
Emergence
through: The drift of a parameter toward a wall of its window coincides with the opening of an adjacent window, and the crossing of the boundary leads into the second state rather than terminating the first.
- transition priority
- asymmetric window crossing
- concurrent persistence and change
Chain to foundations
as tree
- cuspL14
- parameterL4
- windowL7
- parameterL4 (shown above)
- rangeL3
- boundaryL2 (shown above)
- persistL1 (shown above)
- changeL1 (shown above)
- outsideL6
- partL1 (shown above)
- wallL10
- driftL11
- parameterL4 (shown above)
- changeL1 (shown above)
- goL3
- makeL4
- nothingL10
- noneL9
- differenceL1 (shown above)
- amountL8
- offL2
- spaceL0 (shown above)
- differenceL1 (shown above)
- noneL9
- wayL9
- spaceL0 (shown above)
- linksL8
- partL1 (shown above)
- connectsL7
- flowL3
- interactionL2 (shown above)
- persistL1 (shown above)
- structureL2 (shown above)
- broughtL6
- happenL2
- crossL13
- firstL4
- timeL0 (shown above)
- differenceL1 (shown above)
- setsL3 (shown above)
- leadL10
- ratherL3
- secondL4
Neighborhood
Concepts that depend on this one above; what it is built from below.