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Project 1 is assigned today |
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Assignment 2 assigned today |
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Monday is a holiday, so next week’s ‘first lab’
(M/Tu) is canceled |
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Get out a sheet of paper and pencil / pen; put
everything else away. |
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Answer all of the following questions. |
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1. What is the name of Google’s system that
decides how important a page is? |
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2. Which has more hits: |
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sailboards AND oregon |
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sailboards AND oregon AND rental |
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3. Give a query to find pages about Agatha
Christie’s mystery Three Blind Mice |
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A link in file page.html refers to a referenced
file ref.html by relative link: <a
href="ref.html">link</a> |
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Tables keep information in a specific
relationships to other content |
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Locating the right information on the WWW
requires effort |
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The WWW is not the first place to look |
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Go directly to a site -- www.irs.gov |
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Go to right sight -- dictionary.cambridge.org |
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Go to the library -- www.lib.washington.edu |
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Go for the kind of information you want -- www.npr.org |
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Ask, “What site provides this information?” |
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Information is organized in hierarchies |
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No one controls what’s published on the WWW ...
it is totally decentralized |
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To find out, search engines crawl Web |
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Two parts |
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Crawler visits Web pages building an index of
the content |
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Query processor checks user requests against the
index, reports on known pages |
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Searching strategies … |
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Limit by top level domains or format |
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Find terms maximally specific to topic |
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Look elsewhere for key words, e.g. bio |
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Use exact phrase only when universal |
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If too many hits, requery |
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“Search within results” using “-” |
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Once found, ask if site is best source |
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The question of color arose in class: Why is
yellow “full red, full green, no blue” rather than a “primary” color? |
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Much Web information is wrong |
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Using the Web effectively means recognizing
quality information |
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Information from reliable organizations is
usually preferred -- check out ownership |
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Look for accuracy, currency, … |
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Follow links to verify that the content supports
the original page |
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Create a bogus (fictitious) Web page |
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To appreciate how easy it is fake quality info
you will build a bogus Web page |
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Modify photograph, changing its meaning |
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Write misleading text |
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Add “authenticity” links, fake credentials ... |
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Your page should look as legitimate as possible,
but contain false information |
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You will … |
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Write your Web page in HTML |
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Find a photo (or use one of your own) |
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Modify the photo using Photoshop |
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Find links to serve as “authenticity” |
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Milestones |
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Turn In January 24th: Web page |
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Turn In February 3rd: Web page +
photo |
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Follow these steps: |
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Create your page locally |
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When finished, publish it on the server |
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Do not touch after the deadline (2:00AM) |
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Print off a copy and turn it in in class |
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Leave your page unchanged until grading is
complete |
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Notes
