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02 Web Search
The document discusses how search tools have evolved to meet changing information needs. It notes that while Google is a popular search engine, understanding different types of search tools is important. The document categorizes search engines based on what they index and how queries are processed. It also evaluates search engine performance using metrics like recall and precision. Finally, it deconstructs the search experience and considers factors of various search engines like Google.
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02 Web Search
- 1. Google is notenough Fall 2009, Class 2 Prof. Scott Moore http://www.howcanifindit.com/
- 2. Finding information canbe frustrating.
- 3. You search in yourjob search, for classes, for personal reasons.
- 4. Lots more informationavailable now.
- 5. And lots more technology (hardwareand software), too.
- 6. Knowledge is now theability to learn and the ability to find
- 7. Tools are evolvingfor specialized needs.
- 8. Multiple tools are neededto meet your diverse and changing needs
- 9. The changing context of search is driving the need for new tools.
- 10. Changing operating context Then Now
- 11. Changing operating context Then Now Experts You & me
- 12. Changing operating context Then Now Experts You & me Well-defined queries Ill-defined
- 13. Changing operating context Then Now Experts You & me Well-defined queries Ill-defined Thousands of documents Billions of documents
- 14. Understanding search engines will helpyou be a better searcher.
- 15. Search tools canhave several functions Search tools s s
- 16. Search tools canhave several functions Search tools generate Query results & structure s s Document set
- 17. Search tools canhave several functions Search tools generate explore Query results & structure s s Document set
- 18. Search tools canhave several functions Search tools generate explore Query results monitor changes & structure s s Document set
- 19.
- 20. Categorizing search engines Query terms
- 21. Categorizing search engines Query terms and
- 22. Categorizing search engines Query terms and or
- 23. Categorizing search engines Query terms and or Search target addresses images scholarly blogs maps news HTML PDF financial video books
- 24. Categorizing search engines Indexed information Query terms and or Documents Search target addresses images scholarly blogs maps news HTML PDF financial video books
- 25. Categorizing search engines Indexed information Query terms and (Full text) Search engine or Text Documents Search target addresses images scholarly blogs maps news HTML PDF financial video books
- 26. Categorizing search engines Indexed information Query terms and (Full text) Directory Search engine or Text Meta info Documents Search target addresses images scholarly blogs maps news HTML PDF financial video books
- 27. * + ~ - Different search not “” engines support intitle: different special link: search terms & inurl: operators. site:
- 28. Evaluating a searchengine’s performance
- 29. Evaluating a searchengine’s performance Relevant
- 30. Evaluating a searchengine’s performance Retrieved
- 31. Evaluating a searchengine’s performance Relevant Retrieved
- 32. Evaluating a searchengine’s performance Relevant Retrieved B C A
- 33. Evaluating a searchengine’s performance Relevant Retrieved B C A Retrieved & relevant
- 34. Evaluating a searchengine’s performance Relevant Retrieved B C A Not retrieved but relevant Retrieved & relevant
- 35. Evaluating a searchengine’s performance Relevant Retrieved B C A Not retrieved but relevant Retrieved & Retrieved but relevant not relevant
- 36. Evaluating a searchengine’s performance Relevant Retrieved B C A Recall = B A+B Not retrieved but relevant Retrieved & Retrieved but Precision = B B+C relevant not relevant
- 37. Evaluating a searchengine’s performance Relevant Retrieved B C A Recall = B A+B Not retrieved but relevant Retrieved & Retrieved but Precision = B B+C relevant not relevant
- 38. We can understand search engineseven better if we think about the process of searching.
- 39. Deconstructing the searchexperience Search Query Engine Results Subset Searchable of Web information
- 40. Deconstructing the searchexperience Variety & usefulness of special queries Automation Search Query Engine Results Subset Searchable of Web information
- 41. Deconstructing the searchexperience Variety & usefulness of special queries Automation Search Query Engine Content (pages, categories, paid links) Results Format of results Delivery form Subset Searchable of Web information
- 42. Deconstructing the searchexperience Variety & usefulness of special queries Automation Search Query Engine Content (pages, categories, paid links) Results Format of results Delivery form Target Subset Searchable of Web information Quality of Opacity coverage
- 43. Deconstructing the searchexperience Variety & usefulness of special queries Automation Search Query Engine Content (pages, categories, paid links) Results Format of results Delivery form Target Subset Searchable of Web information Quality of How frequently Opacity coverage updated?
- 44. Deconstructing the searchexperience Variety & usefulness Quality of of special queries the experience Automation Search Query Engine Content (pages, categories, paid links) Results Responsiveness Format of results Delivery form Target Subset Searchable of Web information Quality of How frequently Opacity coverage updated?
- 45. Considering: Google Indexed informationQuery terms default Search target Special search Automation Content terms & operators How frequently Quality of coverage Opacity updated? Quality of the Responsiveness experience
- 46. Will students learnthat just Googling something isn’t always the right thing to do?
- 47. Busy students mightspend too much time unsuccessfully searching for information.
- 48. Multiple tools are neededto meet your diverse and changing needs
- 49. Students learn howto effectively and efficiently find information using the right tool.
- 50. Start working throughthe exercises to begin to learn about search.