I believe this is the article.
http://ic.galegroup.com/ic/scic/ReferenceDetailsPage/ReferenceDetailsWindow?failOverType=&query=&prodId=SCIC&windowstate=normal&contentModules=&mode=view&displayGroupName=Reference&limiter=&currPage=&disableHighlighting=true&sortBy=&displayGroups=&zid=&action=e&catId=GALE%7C00000000MV2G&activityType=&scanId=&documentId=GALE%7CCV2424500515&userGroupName=bron59468&jsid=9bdeeffb73fc83510e62895aef67def8
You can get a good idea of the purpose or this article by the thesis sentence (last sentence of the first paragraph).
What is the authors purpose and main idea in this article:
"Robotics" World of Computer Science. Gale, 2002.
3 answers
Ms Sue thank you so much, Now what is the main ideas of the article
The main ideas are those that support the thesis sentence. Look especially at the topic sentence of each paragraph.