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Internet Resources Discovery (IRD)

Internet Resources Discovery (IRD). Meta-Search Engines (MSEs). Contents. Meta Search Engine (MSE) Why use several SEs? Highlighted MSEs Hebrew MSEs MSE comparison When to use MSE – pros and cons How to choose MSE?. Search Engines Generations. 1st Generation - Basic SEs:

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Internet Resources Discovery (IRD)

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  1. Internet Resources Discovery (IRD) Meta-Search Engines (MSEs)

  2. Contents • Meta Search Engine (MSE) • Why use several SEs? • Highlighted MSEs • Hebrew MSEs • MSE comparison • When to use MSE – pros and cons • How to choose MSE? T.Sharon-A.Frank

  3. Search Engines Generations • 1st Generation - Basic SEs: • 2nd Generation - Meta SEs: • 3rd Generation - Popularity SEs: T.Sharon-A.Frank

  4. 2nd Generation SEs - MetaSEs • Using several SEs in parallel. • The results are filtered, ranked and presented to the user as a uniformed list. • The ranking is a combination of the number of sources each page appeared in, and the ranking in each source. T.Sharon-A.Frank

  5. Meta SE is a Meta-Service • It doesn’t use an Index/database of its own. • It uses other external search services that provide the information necessary to fulfill user queries. T.Sharon-A.Frank

  6. Meta Search Engine Google · Yahoo ·Jeeves Ask About · LookSmart · OvertureFindWhat MetaCrawler Yahoo Web Crawler Open Text Lycos InfoSeek Inktomi Galaxy Excite T.Sharon-A.Frank

  7. Premises of a Meta SE • No single search is sufficient. • Problem in expressing the query. • Low quality references can be detected. T.Sharon-A.Frank

  8. Why use Several SEs? • Search Engines differ more than we think! T.Sharon-A.Frank

  9. Overlap between Google and Yahoo Source: Jux2 analysis of 500 top search terms, April 2004 http://www.jux2.com/stats.php T.Sharon-A.Frank

  10. Who Overlaps Whom? T.Sharon-A.Frank

  11. Try it yourself @ jux2 T.Sharon-A.Frank

  12. MSE - Motivation • The number and variety of SEs. • Each SE provides an incomplete snapshot of Web. • Users are forced to try and retry their queries across different SEs. • Each SE has its own interface. • Irrelevant, outdated or unavailable responses. • Each query is independent. • No individual customization. • The result is not homogenized. T.Sharon-A.Frank

  13. Problems of MSEs • No advanced search options. • Using the lowest common denominator. • Sponsored results from the SEs are not highlighted. T.Sharon-A.Frank

  14. Highlighted MSEs T.Sharon-A.Frank

  15. Mamma T.Sharon-A.Frank

  16. Dogpile T.Sharon-A.Frank

  17. Dogpile Advanced (1) T.Sharon-A.Frank

  18. Dogpile Advanced (2) T.Sharon-A.Frank

  19. Dogpile Advanced (3) T.Sharon-A.Frank

  20. Dogpile Advanced (4) T.Sharon-A.Frank

  21. Dogpile Preferences (1) T.Sharon-A.Frank

  22. Dogpile Preferences (2) T.Sharon-A.Frank

  23. Vivisimo • Vivísimo supports the most advanced features of the major search engines. • Need to just use Vivísimo syntax, which follows the most standard conventions. • Vivísimo translates your query into the corresponding syntax of each underlying search engine. • Also, Vivísimo only queries the search engines that support your chosen syntax. T.Sharon-A.Frank

  24. Vivisimo Advanced (1) T.Sharon-A.Frank

  25. Vivisimo Advanced (2) T.Sharon-A.Frank

  26. Clusty T.Sharon-A.Frank

  27. Ixquick (1) T.Sharon-A.Frank

  28. Ixquick (2) T.Sharon-A.Frank

  29. Ixquick (3) T.Sharon-A.Frank

  30. KartOO – Visual MSE T.Sharon-A.Frank

  31. MetaSEs in Hebrew T.Sharon-A.Frank

  32. When to use a MSE? • When single Basic-SE fails to provide good results. • One-stop shopping - prefer to search multiple SEs/sites at once to get blended ranked results (so as to save effort/time). • Searching for multi-faceted topics. • Want to get clustered results to focus search on the relevant keywords. • Looking for current events/news. T.Sharon-A.Frank

  33. MSE pros • Useful when you want to retrieve a relatively small number of relevant results. • An excellent choice for obscure topics. • A good option when you are not having luck finding what you want when you search. • Appropriate when you want to get an overall picture of what is available on the Web on your topic. T.Sharon-A.Frank

  34. MSE cons • Use is limited primarily to simple queries. • Little or no field searching is available. • Most services return a limited number of results that do not represent the total results from any source engine. • Sponsored results are not highlighted (even though probably not first). T.Sharon-A.Frank

  35. How to Choose your MetaSE • Search engines used • Operators supported • Special features • Speed • Presentation T.Sharon-A.Frank

  36. Meta-SEs Features Chart Red – not working T.Sharon-A.Frank

  37. Practical Recommendations • Use Ixquick for fast results and maximal syntax flexibility. • Use Vivisimo/Clusty (as a start) for Clustering and/or Hebrew. • Use Dogpile to include Google, date range, or spelling corrections. • Use none for non-MSE tasks (see MSE cons)… T.Sharon-A.Frank

  38. Bibliography • http://www.cs.washington.edu/homes/etzioni/papers/metacrawler.pdf • http://www.cs.washington.edu/homes/etzioni/papers/ieee-metacrawler.pdf • http://searchenginewatch.com/links/article.php/2156241 • http://vivisimo.com/advanced?form=Advanced • http://vivisimo.com/help.html • http://searchenginewatch.com/searchday/article.php/2226841 T.Sharon-A.Frank

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