Library/PT 130/Sec 2/Reading Comp
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Reading Comprehension

Passage Breakdown

Philip Emeagwali used ideas from nature to make faster computers that solve real problems. He linked tens of thousands of small machines so they could work at the same time (rather than one after another) and copied tree-branch patterns to organize how they share information, which helped him model how oil moves underground. Later he used honeycomb-like spacing to design an even bigger system for long-term weather prediction, and he believes computer designers will increasingly borrow efficient solutions from nature.

Logic Breakdown

Note that the two sentences enumerate the scale and need for simultaneous calculations in modeling oil flow; therefore they likely explain why sequential supercomputers are inadequate. Look for an answer that ties the sentences to the inadequacy of sequential processing.

Passage Stimulus

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11.

Which one of the following most accurately describes the function of the first two sentences of the second paragraph?

Correct Answer
B
"To model oil field flow using a computer requires the simulation of the distribution of the oil at tens of thousands of locations throughout the field. At each location, hundreds of simultaneous calculations must be made at regular time intervals relating to such variables as temperature, direction of oil flow, viscosity, and pressure, as well as geologic properties of the basin holding the oil." These lines show the large scale and need for many simultaneous calculations; the passage earlier states that "supercomputers... worked sequentially [and] were too slow and inefficient to accurately predict such extremely complex movements." Thus the two sentences function to explain why sequential supercomputers cannot accurately predict subterranean oil movements.
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