15th Triennial World Congress of the International Federation of Automatic Control Barcelona, 21–26 July 2002 SEARCH TIPS • Enter one or more keywords. • Searches are not case sensitive. • Use quotes to find an exact phrase, for example: "time-delay". • You can enter multiple keywords, such as time-delay control. Or you can enter a Boolean expression, using AND, OR and NOT. • Multiple keywords entered without a Boolean use the AND expression. Thus, entering time-delay control is the same as entering time-delay and control. • You can use an expression like time-delay or control to find pages containing either keyword. • You can also use parentheses in Boolean expressions. For example, you can enter(time-delay and control) or comparison. • You can use the asterisk (*) as a suffix wildcard character in keywords. For example, enter time* to find pages with keywords such as time or times or timing. • Use NEAR operator to find keywords that appear near to each other. For example, type time-delay near control to find documents with words time-delay and control appearing one near another. • Beside using NEAR operator, you can specify how close keywords could be. For example, use "time-delay w/5 control" (with quotes) to find documents where words time-delay and control appear within a frame of 5 words, or "w/7 time-delay control cookie" to find time-delay, control and cookie within a 7 word frame. Note that common words are not counted as part of word frame. • If no matches are found, reword your query and try again.