# Boolean logic

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## Boolean logic

[boo´le-an]
an algebra that permits operations on sets of elements; it is used in online literature searches. The principal Boolean operators are AND (intersection), OR (union), and NOT (difference).
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
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The goal of matching this performance in a manner consistent with the inference network model originally motivated the work presented in this article, as well as providing a benchmark against which performance of Boolean operators based on PIC matrices could be compared.
PubMed searches can be refined by using multiple search terms connected by Boolean operators: AND, OR, and NOT.
In sample 1, participants were more likely to know that different WSE's have different search capabilities, that Boolean operators could be used to narrow the search, and that a "find similar" link could help narrow the search.
* If the selected node is a Boolean operator, mutate it into another Boolean operator from the same arity value and type.
* The participants' knowledge of the use of Boolean operators increased to a great extent (from 6.8% to 30.8%) after ILI.
It shares common advanced search features with Topsy, including Boolean operators, phrase searching, and date ranging.
The goals of this session are for students to practice basic research strategies including key concepts, alternate search terms, Boolean operators, and truncation, and immediately apply this knowledge by finding relevant articles in appropriate databases for their assignment.
SciFinder does not use Boolean operators to construct search queries and, instead, recommends the use of prepositions in the search query to help the database identify the main research concepts.
The most surprising mistake was, however, that searchers used Boolean operators incorrectly.
The search facility is very powerful despite a certain disregard for the Boolean operators so dear to librarians' hearts.
While free-text searches based on keywords and Boolean operators will continue to be available, a set of discreet topic categories will be added.
AMI's three-tiered analytical approach provides the ability to enter queries in ordinary language without Boolean operators or other search syntax.

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