Using AND, OR and NOT The operators AND, OR and NOT can be used to define the relationship between search terms. e.g.:
electron AND proton finds articles containing both 'electron' and 'proton'.
electron OR proton finds articles containing 'electron', 'proton', or both.
electron NOT proton finds articles in which the word 'electron' appears, but the word 'proton' does not.
Using parentheses Parentheses can be used to structure searches. e.g.:
(stress OR strain) AND function waveform OR (harmonic AND oscillator) To search for a group of characters containing parentheses, the group must be surrounded by double quotes.
Searching is case insensitive, so that a search for structure or STRUCTURE will find all articles containing 'structure', 'Structure', or 'STRUCTURE' (the AND, OR and NOT are also case insensitive).
Searching by date range To activate the date range fields choose From/To from the date range drop down. Please ensure the 'From' date is always earlier than the 'To' date.
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