World dynamicsWright-Allen Press, 1971 - 142 pages |
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Page 18
... represented by using only levels and rates . The two kinds of variables are necessary but at the same time sufficient for representing any system . Full explanation of these and other prin- ciples of structure and the principles of the ...
... represented by using only levels and rates . The two kinds of variables are necessary but at the same time sufficient for representing any system . Full explanation of these and other prin- ciples of structure and the principles of the ...
Page 53
... represented by a simple aging process . A fraction of the capital is discarded each year . This fraction is the capital - invest- ment discard normal CIDN , having a value of 0.025 . This fraction represents an average life which is the ...
... represented by a simple aging process . A fraction of the capital is discarded each year . This fraction is the capital - invest- ment discard normal CIDN , having a value of 0.025 . This fraction represents an average life which is the ...
Page 57
... 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 conditions exising in 1970. A value for POLAT of 1 year is taken for ...
... 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 conditions exising in 1970. A value for POLAT of 1 year is taken for ...
Contents
Introduction | 1 |
Structure of the World System | 17 |
A World Model Structure and Assumptions | 31 |
Copyright | |
6 other sections not shown
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 NRUN1 occurs ORIGINAL peak person policies pollution crisis pollution ratio POLN1 POLR population possible present 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 TABLE taken tion units usage variable world system