World Dynamics |
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Page viii
Because the “ system dynamics ” approach as already developed at the
Massachusetts Institute of Technology seemed well suited , the group was invited
to Cambridge to determine firsthand if they agreed that the methods then existing
would ...
Because the “ system dynamics ” approach as already developed at the
Massachusetts Institute of Technology seemed well suited , the group was invited
to Cambridge to determine firsthand if they agreed that the methods then existing
would ...
Page ix
But how should we proceed so that the most acceptable model is also the best
one that is available ? We should try for three things . First , the best existing
model should be identified at each point in time . Second , the best currently
existing ...
But how should we proceed so that the most acceptable model is also the best
one that is available ? We should try for three things . First , the best existing
model should be identified at each point in time . Second , the best currently
existing ...
Page 57
It is the length of time needed for 63 % of any existing pollution to disappear . It
represents the same concept as the half - life of atomic decay which is the time for
half of the material to disintegrate . A pollution ratio POLR of 1 represents the ...
It is the length of time needed for 63 % of any existing pollution to disappear . It
represents the same concept as the half - life of atomic decay which is the time for
half of the material to disintegrate . A pollution ratio POLR of 1 represents the ...
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Contents
Introduction | 1 |
Structure of the World System | 17 |
A World Model Structure and Assumptions | 31 |
Copyright | |
5 other sections not shown
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Common terms and phrases
accumulation action actual agriculture appear assumed assumptions average become behavior billion birth rate capital investment Capital-investment cause Chapter consequences continue created crowding curve death rate decline defined depends described developed discard discussed dynamic effect environment equations equilibrium examine existing expect factor falling Figure food production food ratio forces fraction further future gives greater grow growth higher improve increase indicated industrialization influence initial land less limit LOGICAL FUNCTION loop lower material standard means mode MULTIPLIER DIMENSIONLESS natural resources natural-resource normal NREM occurs peak person policies pollution absorption pollution crisis pollution ratio POLR population possible pressures probably processes raise rate normal reaches reduced relationship remaining represents result rise sector shortage shown shows social systems space standard of living stop structure suppressed SWITCH TABLE taken tion understand UNITS usage variable world system