Fall2007Lecture3B

Fall2007Lecture3B - Engineered Systems Performance...

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Engineered Systems— Performance
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Assessment of Multiple Corridor Facilities Six Measures of System Performance Quantity of congestion Intensity of congestion Duration of congestion Extent of congestion Variability Accessibility System Performance Report Card Modal LOS Report Card
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Natural and Engineered Systems— Capacity
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Logistic Population Growth N = K 1 + e - r ( t - t *) Where N = Population r = Growth Rate (t-t*) = time K = Carrying Capacity The $64 question is: What Controls K ?
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#1 Response: WATER! Total Water in the World Oceans 97.3% Freshwater 2.7% Available* 0.6% Glaciers/Ice 2.1% Desalination and water “recycle” are technologically feasible, and economical, today. Freshwater Breakdown * groundwater and surface water (e.g. lakes, rivers) But the World is covered with it!
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# 2 Response: Food Case study: The State of Iowa (where the tall corn grows) 92% of Iowa’s land is dedicated to food production per year productivity 11.8 million acres of corn 10.9 million acres of soybeans
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Fall2007Lecture3B - Engineered Systems Performance...

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