Web search lecture september 2011


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  • Note that all the major search engines are more-or-less the same.
  • Web pages come in stylized forms…
  • On the Stanford site, point out that links are usually blue and underlined, but NOT ALWAYS. (Stanford has lots of roll-overs.)
  • Web search lecture september 2011

    1. 1. So you think you can search? Search engines and information acces on the internet Presenter Name : Stefania Druga Client Logo
    2. 2. Objectives 1 Understand what a search engine is and how information is organised on the internet 2 Be able to find specific information 3 Identify the best source for your needs 4 Compare and evaluate results
    3. 3. Search engines Or how the information is organised on the internet
    4. 4. 1: Search Basics <ul><ul><li>Some basic terms: </li></ul></ul><ul><ul><li>Web site: a collection of web pages on a web server </li></ul></ul><ul><ul><li>Browser: the software you use to view web pages </li></ul></ul><ul><ul><ul><ul><li>such as: Internet Explorer (IE), Firefox, Safari, Opera </li></ul></ul></ul></ul><ul><ul><li>Query: the terms you send to Google to ask your question </li></ul></ul><ul><ul><li>URL: the string that refers to the web page </li></ul></ul><ul><ul><li>Plugin: an extra piece of code that plugs into the browser </li></ul></ul><ul><ul><ul><ul><li>such as: Quicktime, Flash, SVG, …. </li></ul></ul></ul></ul>
    5. 5. How to read a single result Title snippet URL Yahoo’s Microsoft’s
    6. 6. How to read the whole page
    7. 7. Web pages (the rhetoric of…) left hand nav ads onsite links
    8. 8. What’s on the search page? Address bar Google tool bar Query box Search button
    9. 9. Tools point #1: Finding a word on a web page <ul><ul><li>How do you find something on a long, complicated web page? (like this one…) </li></ul></ul>
    10. 10. How to FIND on page <ul><ul><li>Do you know how to find something on a web page? </li></ul></ul><ul><ul><li>Hint: Use the Find command… </li></ul></ul><ul><ul><ul><li>Edit>Find (or Control-F) </li></ul></ul></ul><ul><ul><ul><li>Note that works differently on Firefox vs. Internet Explorer </li></ul></ul></ul><ul><ul><ul><li>(Demo) </li></ul></ul></ul>[tomatoes] then <gardening>
    11. 11. How to find-on-this-page (IE) <ul><ul><li>Easy reminder… </li></ul></ul><ul><ul><li>NOTE that when you do the find , the computer will scroll the window to that location. </li></ul></ul>
    12. 12. How to find on a page (Chrome)
    13. 13. Find on Chrome… Type into this “find” box Note how hits are shown in the scroll bar
    14. 14. Tools point #2: How to use tabs
    15. 15. 2: Knowing about sites <ul><ul><li>A website is: </li></ul></ul><ul><ul><ul><li>a collection of web pages </li></ul></ul></ul><ul><ul><ul><li>a collection of links between the pages </li></ul></ul></ul><ul><ul><ul><li>programs that do services (such as lookup things) </li></ul></ul></ul><ul><ul><ul><li>tracking services (that watch users as they use the site) </li></ul></ul></ul>Demo: links / pages http://www.stanford.edu Demo: rollover link to see address Demo: offsite links (e.g., to YouTube) www.foo.com
    16. 16. Sites often have their OWN search <ul><ul><li>Sometimes a site’s search tool can be very effective </li></ul></ul><ul><ul><ul><li>More up-to-date with latest information </li></ul></ul></ul><ul><ul><ul><li>Might index parts of the website not visible to search engines </li></ul></ul></ul><ul><ul><ul><li>(And sometimes… not…) </li></ul></ul></ul>
    17. 17. But… <ul><ul><li>Sometimes a site’s own search engine isn’t very effective </li></ul></ul><ul><ul><ul><li>Their search engine might not be sophisticated </li></ul></ul></ul><ul><ul><ul><li>Their search engine might not cover the things you think are in the web site! </li></ul></ul></ul><ul><ul><li>In such cases, it’s much better to back up and use an external search engine </li></ul></ul>IMDB is great, but don’t try looking for the actor who won the most Oscars here….
    18. 18. How the web works… <ul><ul><li>Visible web: everything that’s indexed by search engines </li></ul></ul><ul><ul><li>Deep web: everything that’s on the web, but not indexed! </li></ul></ul><ul><ul><ul><li>Sometimes called the “invisible web” </li></ul></ul></ul>* * Demo: http://data.bls.gov/cgi-bin/surveymost?fi (Bureau of Labor Statistics databases)
    19. 19. 3: How to organize a search <ul><ul><li>THINK FOR A SECOND! </li></ul></ul><ul><ul><li>What is it I’m looking for? </li></ul></ul><ul><ul><ul><li>(think about common keywords) </li></ul></ul></ul><ul><ul><li>How would someone else talk about it? </li></ul></ul><ul><ul><ul><li>(what words would they use? how would THEY describe it?) </li></ul></ul></ul><ul><ul><li>Which of those terms would be most common? </li></ul></ul><ul><ul><li>Which of those terms would be very specialized to this topic? </li></ul></ul><ul><ul><li>What kind of thing would make me happy? </li></ul></ul><ul><ul><ul><li>(do I want a single web page, a definition, a collection, an image.... or … ?) </li></ul></ul></ul>Big tip!
    20. 20. Great gateway sites: <ul><ul><li>www.cia.gov – primarily for international facts, data </li></ul></ul><ul><ul><li>www.wikipedia.com – wide-ranging encyclopedia on many topics </li></ul></ul><ul><ul><li>www.reference.com – another encyclopedia </li></ul></ul><ul><ul><li>www.about.com – tutorials, articles on many DIY topics, sports, hobbies, etc. </li></ul></ul><ul><ul><li>Many gateway / background sites exist on particular topics: </li></ul></ul><ul><ul><ul><li>Tip : to find gateway sites, include “how-to” or “DIY” </li></ul></ul></ul><ul><ul><ul><li>Try : [ model airplanes how-to ] </li></ul></ul></ul>
    21. 21. Demonstration: Go to gateway, learn key terms , then search <ul><ul><li>Example: </li></ul></ul><ul><ul><ul><li>What are the Easter Island statues called? (What’s the special term?) </li></ul></ul></ul><ul><ul><ul><li>[ Easter Island statues ] </li></ul></ul></ul><ul><ul><li>“ low frequency” terms don’t occur very often, except in the context of what you’re trying to lookup (that means they’re rare.. and precise!) </li></ul></ul><ul><ul><li>Demo: [ moai ] </li></ul></ul><ul><ul><li>Demo: [ raft ] </li></ul></ul><ul><ul><ul><li>“ raft” also means something else… what’s this other stuff on the SERP?? </li></ul></ul></ul><ul><ul><li>Try: [ raft water ] </li></ul></ul>
    22. 22. The Art of Keyword Choice
    23. 23. Hints to choose keywords… <ul><ul><li>Think about what you’re trying to find </li></ul></ul><ul><ul><li>Choose words that you think will appear on the page </li></ul></ul><ul><ul><li>Put yourself in the mindset of the author of those words </li></ul></ul>
    24. 24. Keywords: Naming the un-namable I noticed the other day that everyone has a little indentation on their upper lip. Question: What’s that thing called?
    25. 25. Answer <ul><ul><li>Start with the simplest search you can think of: </li></ul></ul><ul><li>[ upper lip indentation ] If it’s not right, you can always modify it. </li></ul><ul><ul><li>When I did this, I clicked on the first result, which took me to Yahoo Answers. There’s a nice article there about something called the philtrum . </li></ul></ul><ul><ul><li>Then I double checked on that by doing a [ define:philtrum ] </li></ul></ul>
    26. 26. DEFINE: <ul><ul><li>A very useful thing to have… </li></ul></ul><ul><ul><li>Pattern: </li></ul></ul><ul><ul><li>[ DEFINE: <term or phrase> ] </li></ul></ul><ul><ul><li>Examples: </li></ul></ul><ul><ul><ul><li>[ define:philtrum ] </li></ul></ul></ul><ul><ul><ul><li>[ define:paramecium ] </li></ul></ul></ul><ul><ul><ul><li>[ define:zero day attack ] </li></ul></ul></ul>
    27. 27.  When you’re choosing search keywords… <ul><ul><li>When you eat pig, the meat is called “pork.” When you eat sheep, the meat is called “mutton.” When you eat deer, the meat is called “venison.” </li></ul></ul>
    28. 28. Exercise: Thinking about synonyms… <ul><ul><li>Suppose you visit your cousin in Sydney, Australia and they serve grilled kangaroo. What’s another word for “kangaroo meat”? </li></ul></ul>
    29. 29. Activity
    30. 30. Activity <ul><li>Find a search question. Think about a subject or a person that you would like to know more about. </li></ul><ul><li>Got to: http://www.noodletools.com/noodlequest and check the boxes that correspond to your question. </li></ul><ul><li>Follow the search strategy. </li></ul><ul><li>Present the result! </li></ul>
    31. 33. Thank You! Resources and materials used from the repository created by Dan Russell- https://sites.google.com/site/gwebsearcheducation/