02 Web Search
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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.
02 Web Search
- 1. Google is not enough Fall 2009, Class 2 Prof. Scott Moore http://www.howcanifindit.com/
- 2. Finding information can be frustrating.
- 3. You search in your job search, for classes, for personal reasons.
- 4. Lots more information available now.
- 5. And lots more technology (hardware and software), too.
- 6. Knowledge is now the ability to learn and the ability to find
- 7. Tools are evolving for specialized needs.
- 8. Multiple tools are needed to 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 help you be a better searcher.
- 15. Search tools can have several functions Search tools s s
- 16. Search tools can have several functions Search tools generate Query results & structure s s Document set
- 17. Search tools can have several functions Search tools generate explore Query results & structure s s Document set
- 18. Search tools can have several functions Search tools generate explore Query results monitor changes & structure s s Document set
- 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 search engine’s performance
- 29. Evaluating a search engine’s performance Relevant
- 30. Evaluating a search engine’s performance Retrieved
- 31. Evaluating a search engine’s performance Relevant Retrieved
- 32. Evaluating a search engine’s performance Relevant Retrieved B C A
- 33. Evaluating a search engine’s performance Relevant Retrieved B C A Retrieved & relevant
- 34. Evaluating a search engine’s performance Relevant Retrieved B C A Not retrieved but relevant Retrieved & relevant
- 35. Evaluating a search engine’s performance Relevant Retrieved B C A Not retrieved but relevant Retrieved & Retrieved but relevant not relevant
- 36. Evaluating a search engine’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 search engine’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 engines even better if we think about the process of searching.
- 39. Deconstructing the search experience Search Query Engine Results Subset Searchable of Web information
- 40. Deconstructing the search experience Variety & usefulness of special queries Automation Search Query Engine Results Subset Searchable of Web information
- 41. Deconstructing the search experience 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 search experience 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 search experience 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 search experience 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 information Query 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 learn that just Googling something isn’t always the right thing to do?
- 47. Busy students might spend too much time unsuccessfully searching for information.
- 48. Multiple tools are needed to meet your diverse and changing needs
- 49. Students learn how to effectively and efficiently find information using the right tool.
- 50. Start working through the exercises to begin to learn about search.