In case you perform a complex search the ef fi ciency may be improved by

In case you perform a complex search the ef fi ciency

This preview shows page 55 - 58 out of 167 pages.

In case you perform a complex search, the ef fi ciency may be improved by combining searches. Searches are combined by closing individual searches between parentheses and then by connecting these searches with a Boolean operator. If you retrieve too many results on a given subject then you can use AND to direct your search. The more terms that are connected with AND, the more focused the results. Remove truncation. If you retrieve too many records on an unrelated subject, use NOT to narrow the search. If you get too few records for your topic, use OR to expand your search and to increase the number of references that you are going to fi nd. Use truncation or wildcards in order to seek alternative ways of spelling or choices of your term. Combining keywords enables fi nding the most appropriate information resour- ces about a subject. We recommend creating various combinations of keywords using Boolean operators, for example AND-OR-AND NOT. A Boolean machine can help to teach students how these operators work (Fig. 4.8 Boolean machine). Fig. 4.7 ProQuest provides British Nursing Indexing Tezaurus 46 4 Accessing Information
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4.7 Search of Phrases Search of phrases allows you to combine terms so that they are retrieved one next to the other and in the same order; they are indicated putting quotation marks around terms. For example, New York Stock Exchange or Hilary Rodham Clinton 4.8 Truncation Truncation may be very useful when you wish to retrieve variants of the same term. In order to truncate a word, keep the root or radical replacing the changing part with a wildcard symbol. The symbol may be *. Example: If you wish to search the terms: communication and communicate, the root is communicat and the searched truncated term will have the following form: communicat* Fig. 4.8 Boolean machine ( ) 4.6 Boolean Logic Operators 47
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Suggested Teaching Warm-Up/Introduction A pre-test Prepare an envelope with the questions: Who decides what the need for information is? In other words, who decides what information is needed? Who and how can he use the information? What is the cost of knowledge and ignorance? Variant No. 1 Divide the participants into three groups. Ask them to choose one leader from each group. He will choose one of the three cards. The trainer will share paper sheets for each participant and explain to the participants that in the fi rst phase they will answer individual questions and query the answers. In the second phase, they will discuss and harmonise the answers. In the third stage, leaders will answer questions with the group s answers and arguments. Variant No. 2 Each participant receives one card with all the questions or, as the case may be, the age of the participants, with only one question of those mentioned above, ensuring that all are written on the cards. Also, other questions of greater relevance can be formulated.
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  • Winter '09
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