RS Book Ch 31
Help!
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| what is a search engine? | information retreval systems that search the Internet and electronic databases for websites, files or documents based on keyword or phrases.
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| Databases | are organized systemss that allow search access for specific content or information.
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| Boolean logic: | utilizes three primary operators: AND, NOT, and OR
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| AND does what to the search | narrows it
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| OR does what to the search? | broadens the search
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| NOT does what to the search | excludes concepts from the search
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| National Library of Medicine: Medical Subject Headings (MeSH) terms: | consists of sets of termis in a hierarchical structure or "tree" taht permits searchin at various levles of specificity
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| Science Citation Index: | a reference system that allows researchers to search based on citations, by traking literature forward or backward, and across diciplinary boundries.
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| recall: | the proprotion of retrieved citation that are releant or the likelihood of finding relevant references.
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| Precision (for citations) | is the proportion of citation that are relevant that the search is able to retrieve, or the likelyhood of excluding irrelevant references.
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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