1. Computer Science 1000 Information Searching Permission to redistribute these slides is strictly prohibited without permission

2. Advanced Searches most search engine uses are simple type query into edit box sift through results certain techniques can provide better results logical operators better keyword selection

3. Operators recall our previous discussion about intersecting queries the basic idea: return all results that are common to all of the keywords e.g. red fish guppy in other words, return the sites that pertain to red AND fish AND guppy

4. Operators – AND technically speaking, this is considered an AND query all words must be associated with the page AND is considered an operator a logical operator for Google queries, AND is the default typing a list of words into Google performs an AND query

8. Operators suppose that we want to find a specific phrase e.g. human powered flight how do we search for this?

9. Result does not contain the phrase human powered flight

10. Operators – "" to find a specific phrase, wrap it in double quotes

11. Operators – "" note that quotes can be combined with AND to create an AND query over phrases

12. Operators – OR AND finds results that pertain to all terms what about pertaining to at least one term?

13. Operators – OR use the OR operator

14. Operators – NOT use the – operator (called NOT) to specify terms that you don't want to appear in your results

15. Advanced Search if you forget the operator terms, Google has a page that automatically adds them for you

16. Advanced Search if you forget the operator terms, Google has a page that automatically adds them for you

17. Keyword Selection computational linguistics and natural language processing have improved search engines considerably still, they rely on relatively simple rules for choosing results search strategies often include verbatim text searches that are meaningful to you (the user), but confusing to the search engine

18. Example: What is the most that an NHL player has made in a season?

20. Previous results not so helpful What is the most that an NHL player has made in a season? most English speakers would deduce that we are referring to money in the previous question however, a search engine may not make that deduction let's specifically ask about money

22. Still not there... search engines use popular terms and phrases in your query to match results extra phrases/slang can confuse results greater specificity = better results you don't need proper English sentences – stick to keywords and key phrases in previous example, what are we really looking for: nhl player highest salary single season