The problem of fit between ecosystems and institutions

By Carl Folke, Lowell Pritchard. 2007

798 citations recorded by the source corpus.

An internal combustion engine ignition system wherein both arc-creating and arc-maintaining voltages are applied to the spark plug or plugs through a single ignition transformer energized through a single primary circuit in the well-known "Kettering" circuit. A switch in the primary circuit, preferably a transistor, repeatedly switches "on" and "off" to create a plurality of primary current on and current off events during each ignition period. The ignition coil primary to secondary turns ratio, the duration of the current on and current off events, and the various circuit parameters are chosen (a) to create by transformer action an ignition arc-sustaining potential of sufficient magnitude to maintain a previously initiated ignition arc across the spark plug arc gap as the current builds up during each current on event; (b) to generate an initial high inductive discharge arc-striking voltage spike across the spark plug air gap when the switch is abruptly switched off at the commencement of the subsequent current off event; and (c) to create a sustained arc-maintaining voltage for the balance of the switch off event after the arc is struck due to the inductive current decrement under arcing conditions. As a consequence of this action, the arc is normally struck at the inception of the first off event and is maintained until after the last on event, and at the same time the arc may be restruck at the commencement of any of the subsequent off events should it go out.

Subfields: Global and Planetary Change, Management, Monitoring, Policy and Law

View Paper: https://www.semanticscholar.org/paper/e5632ea39a2c8a771cc81d763bca17d3f8666b34

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In Global and Planetary Change

  1. Carl Folke
  2. Reinette Biggs
  3. J. Marty Anderies
  4. Marco A. Janssen
  5. Ö. Bodin
  6. Kasper Kok
  7. Harini Nagendra
  8. H. Ernstson

In Management, Monitoring, Policy and Law

  1. Reinette Biggs
  2. Rakhyun E. Kim
  3. J. Marty Anderies
  4. Ö. Bodin
  5. Michel E. Etienne
  6. Kasper Kok
  7. M. Rudd
  8. Toddi A. Steelman

Citations in the corpus