Information Technology Reference
In-Depth Information
Figure 15.9 The first official query was about early satellites' paint problems
Figure 15.10 Change the proximity value for more accurate search returns
Evaluating Returns
Figure 15.11 shows the search results from the original test with the most relevant results expanded.
Acrobat ranks the results by number of hits of the words and how close they are together. In the collection
there were 63 documents that had explorer and paint within 50 words - most of these returns were from
later years and in the Employee Classified Ads describing Ford Explorer SUVs with good paint jobs!
Search Outcomes
The document with the highest relevance produced the desired information. Early satellites were painted
white, which turned yellow in outer space. Yellow does not reflect heat as well as white, and the internal
temperatures in the satellites rose 40 degrees Fahrenheit.
Figure 15.12 shows the new paint scheme on Explorer VII, which was better suited to the space
environment. Another search found that the trademark black and white paint job on the Saturn rocket
caused metal wrinkling on the second stage from differences of expansion between the black and white
painted metals. These searches took seconds instead of days thanks to Acrobat's catalog features.
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