Educational Computing

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EducationalComputing
CIS 204March 12, 2008

• David Goldschmidt, Ph.D.
• Computer Science
• The College of Saint Rose

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The Internet as Global WAN

• The Internet is the worlds largest network
• Links millions of businesses, governments,
  educational institutions, and individuals

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Web Page Retrieval
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World Wide Web

• World Wide Web (WWW)
• Invented by Tim Berners-Leein early 1990s while
  at CERN
• Web is decentralized andruns on top of the
  Internet
• Building blocks of the Web
• Uniform Resource Locator (URL)
• HyperText Transfer Protocol (HTTP)
• HyperText Markup Language (HTML)

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Uniform Resource Locators

• Uniform Resource Locator (URL) identifies the
  protocol, domain (machine) name, and file path of
  resource being requested
• http//academic2.strose.edu/math_and_science/golds
  chd

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HyperText Markup Language

• HyperText Markup Language (HTML) definespage
  layout, fonts, links, text, etc.
• HTML tags describe how Web browsersshould
  display text, images, etc.
• lthtmlgt
• lttitlegtWelcome to My Web Sitelt/titlegt
• ltbody bgColor"gray" text"black"gt
• ltimg src"people.gif" width"184" height"119"gt
• ltpgtWelcome to my cool new Web site.
• lta href"http//www.cnn.com"gtClick here for
  news.lt/agt
• lt/pgt

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Web Site Design Process

• Steps to building a Web site
• Define objectives and intended audience of the
  Web site
• Select the content to be presented
• Determine the navigational structure and layout
• Construct the individual Web pages
• Test your Web site (proofread content, verify
  links)
• Obtain server space and a URL
• Publish, then publicize, your Web site
• Keep Web page content up-to-date

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Web Site Design

• A Web site consists of many individual Web pages
• Web pages within a site usually have a consistent
  look and feel or user interface layout
• Achieve a consistent user interface layout by
• Copying-and-pasting the same HTML code from one
  HTML file to another
• Using JavaScript to generate the same HTML code
  on each Web page
• Designing a Web site using the ltFRAMESgt tag

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Domain Name Registration
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Graphics on the Web

• Images are available on the Web inmany different
  formats

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Graphics on the Web

• Graphics embedded inWeb pages using HTML

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Saving Images

• After finding an image, right-click on it, then
  select Save Picture As... or Save Image As...