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Internet Presentation

  1. 1. The Internet and World Wide Web Sullivan University Library
  2. 2. What is the Internet? <ul><li>The Internet is a worldwide network of connected computers. </li></ul><ul><li>This allows the sharing of electronic information and resources. </li></ul>
  3. 3. What is the Internet? <ul><li>The Internet is considered the LARGEST telecommunications system ever created. </li></ul><ul><li>A common set of rules, known as protocols, allow the transport and viewing of files and documents found on computers connected to the Internet. </li></ul>
  4. 4. What is the World Wide Web? <ul><li>The World Wide Web (or WWW) is one part of the Internet. </li></ul><ul><li>Other parts of the Internet include: e-mail or FTP files. </li></ul>
  5. 5. The World Wide Web (WWW) <ul><li>The World Wide Web is a hypertext-based system. </li></ul><ul><li>Hypertext allows users to click on buttons or highlighted text using a mouse to go to other Web pages containing text, sound, pictures, or video . </li></ul>
  6. 6. The World Wide Web (WWW) The World Wide Web is accessed by the use of a web browser
  7. 7. Web Browsers <ul><li>A browser lets you access the WWW and “browse” the Internet for information. </li></ul><ul><li>You use the browser to maneuver through web pages. </li></ul>
  8. 8. Parts of a Web Browser
  9. 9. Parts of a Web Browser <ul><li>Title Bar: Lists the title of the web page that you are viewing. There are three buttons to the right of the title bar which reduce, maximize, or close the screen. </li></ul><ul><li>Content Area: Displays the current web page that is open on the browser. </li></ul>
  10. 10. Parts of a Web Browser <ul><li>Address Field: Shows the URL (Web address) of the web page that is currently displayed. </li></ul><ul><li>Status Indicator: Shows whether or not the Web page has completely loaded and can be viewed. </li></ul>
  11. 11. Parts of a Web Browser <ul><li>Progress Bar: Indicates how much of the web page has loaded for viewing. </li></ul><ul><li>Status Message Field: Tells you the status of the web page. Indicates when the web page is done and open for viewing. </li></ul>
  12. 12. Parts of a Web Browser <ul><li>Scroll Bar: This is used to move up or down on the web page. </li></ul>
  13. 13. The Browser Toolbar To go forward one page To go to the home page To find a word on that page To print that page To stop a page from loading To move backward one page To open a dialog box to type a URL
  14. 14. Web Browsers <ul><li>A browser “reads” the WWW pages, which are written in Hypertext Markup Language (HTML), and converts them into a readable form. </li></ul><ul><li>To look at an example of HTML , click the VIEW menu at the top of a browser screen. This brings down a sub-menu screen. Click on SOURCE. After viewing, click on X (the close screen button) to close the source box. </li></ul>
  15. 15. Web Browsers <ul><li>This is the Sullivan University Library home page in HTML. </li></ul>
  16. 16. The World Wide Web (WWW) <ul><li>Includes text, pictures, videos, and sounds. </li></ul>Consists of web sites
  17. 17. What is a Web Site? <ul><li>A web site is similar to a magazine with articles. It is a collection of web pages. </li></ul><ul><li>A home page is “the front cover” that tells what is inside. </li></ul><ul><li>A web page is an individual page that can be found on a web site. </li></ul>
  18. 18. The Library’s Home Page This is an example of a World Wide Web (WWW) page. (
  19. 19. Web Addresses <ul><li>Every web page must have an unique web address to be found on the Internet. </li></ul><ul><li>http:// / is an example of a web address (also known as a Uniform Resource Locator or URL) </li></ul>
  20. 20. Uniform Resource Locators (Web Addresses) <ul><li>Your browser uses the web address (URL) to find information located on another computer and to retrieve the corresponding page situated on that server. </li></ul>
  21. 21. Uniform Resource Locators (Web Addresses) <ul><li>Each part of the URL directs the browser to the correct web page. </li></ul> Hypertext Transfer Protocol (HTTP) Network Domain Filename
  22. 22. Different Domains on the WWW <ul><li>.com </li></ul><ul><li>.net </li></ul><ul><li>.edu </li></ul><ul><li>.org </li></ul><ul><li>.gov </li></ul>commercial network educational organization government
  23. 23. Connecting to the Internet Once you log on to a computer on campus, click on the BIG blue “E” to connect to the Microsoft Explorer browser.
  24. 24. Sullivan University Library’s Web Page In the address box of the Microsoft Explorer Browser: Type / and click the Go button. (The Microsoft Explorer version in the Computer Lab automatically assumes that http:// is in front of the rest of the address so http:// does not have to be typed in.)
  25. 25. The Library’s Home Page
  26. 26. Features of the Sullivan University Electronic Library: Online Catalog: Books, audiotapes, and videotapes available on Sullivan University campuses. Databases: Databases available to Sullivan University students Reference Center: Tutorials, research guides, and periodical information Archives: Class pictures, commencement programs, and copies of old Heralds. CSS: Materials and information needed for the library component of College Success Skills class. Library Services: Services offered by the library, including Ask A Librarian.
  27. 27. How to Access Web Pages <ul><li>Here are three ways to access a web page: </li></ul><ul><li>Type the Uniform Resource Locator (URL) in the address box. </li></ul><ul><li>Click on hypertext links on a web page. </li></ul><ul><li>Use a search tool such as a keyword search engine or web directory. </li></ul>
  28. 28. How to Access Web Pages: Type the URL in the Address Box <ul><li>Type the Uniform Resource Locator (web address) in the browser address box. </li></ul><ul><li>Click GO (or press the ENTER button on the keyboard). </li></ul><ul><li>The web address must be correct (no misspellings, extra spaces, etc.) to go to the correct web page. </li></ul>
  29. 29. How to Access Web Pages: Click on Hypertext Links <ul><li>Hypertext links on a web page lead to other web pages. </li></ul><ul><li>The links on a web page are usually highlighted, underlined, or are pictures. </li></ul>
  30. 30. How to Access Web Pages: Click on Hypertext Links <ul><li>When you place the mouse cursor over a link, the arrow will change into a hand. </li></ul><ul><li>Click on the link to go to another web page. </li></ul><ul><li>Use your BACK button to return to the original web page. </li></ul>
  31. 31. How to Access Web Pages: Use a Search Tool <ul><li>Search tools help you find information on the WWW. </li></ul><ul><li>No single search tool finds every web site or web page in existence. Different search tools search different and overlapping parts of the web. </li></ul>
  32. 32. How to Access Web Pages: Use a Search Tool <ul><ul><li>Some of the different types of search tools include: </li></ul></ul><ul><ul><li>Web directories </li></ul></ul><ul><ul><li>Search engines </li></ul></ul><ul><ul><li>Metasearch engines </li></ul></ul>
  33. 33. Web Search Tools: Web Directories <ul><li>Web directories are a collection of web sites gathered by the creators of the directory or submitted by publishers of web sites. </li></ul><ul><li>The web sites in a directory are classified by subject. </li></ul>
  34. 34. Web Search Tools: Web Directories <ul><li>Web directories are often useful for researching broad subjects or topics. </li></ul><ul><li>Yahoo! has an example of a web directory. </li></ul>
  35. 35. Web Search Tools: Web Search Engines <ul><li>Search engines are databases that allow you to search for some or all of the words appearing on web pages. </li></ul><ul><li>Search engines are automated. </li></ul>
  36. 36. Web Search Tools: Web Search Engines <ul><li>You may get thousands (or millions) of results, especially searching for a common or broad term. Some of the results may not be exactly what you are looking for. </li></ul><ul><li>AltaVista is an example of a search engine. </li></ul>
  37. 37. Web Search Tools: Metasearch Engines <ul><li>Metasearch engines are very similar to search engines but present results from more than one search engine at a time. </li></ul><ul><li>MetaCrawler is an example of a metasearch engine. </li></ul>
  38. 38. Web Searching: The Invisible Web <ul><li>As mentioned earlier, you will not find every single web site on a topic using search engines. </li></ul><ul><li>There is an Invisible Web (also known as the Hidden Web) that contains web sites not found using typical search engines. Some of these web sites are found using specialized web databases. Click here for more information about the Invisible Web. </li></ul>
  39. 39. Conducting an Effective Search on the Web <ul><li>Before you start a search, look closely at your subject topic: </li></ul><ul><li>Are there unique words, abbreviations, acronyms or synonyms for your topic? </li></ul>
  40. 40. Conducting an Effective Search on the Web <ul><li>Before you start a search, look closely at your subject topic: </li></ul><ul><li>Are there any organizations or societies on the web related to your topic? </li></ul>
  41. 41. Conducting an Effective Search on the Web <ul><li>Before you start a search, look closely at your subject topic: </li></ul><ul><li>Do any of the topic words belong together as a phrase? </li></ul>
  42. 42. Conducting an Effective Search on the Web <ul><li>Before you start a search, look closely at your subject topic: </li></ul><ul><li>Are there any terms you would want to leave out of a search? </li></ul>
  43. 43. Conducting an Effective Search on the Web <ul><li>Before you start a search, look closely at your subject topic: </li></ul><ul><li>What broader or narrower terms are related to your topic? </li></ul>
  44. 44. Conducting an Effective Search on the Web <ul><li>Most Important: Read the help or instruction pages for the search tool you are using. </li></ul><ul><li>Avoid using words such as “a,” “of,” and “for.” These are often ignored during a search. </li></ul>
  45. 45. Conducting an Effective Search on the Web <ul><li>Enter the most important words first. </li></ul><ul><li>Often search engines will search and rank the first term used before any of the other search words. </li></ul>
  46. 46. Conducting an Effective Search on the Web <ul><li>Use capitalization for proper nouns and acronyms. </li></ul><ul><li>Use the lower case for words other than proper nouns. (Many search tools will search for both capitalized and uncapitalized words if the lower case is used). </li></ul>
  47. 47. Conducting an Effective Search on the Web <ul><li>Enclose phrases in quotes: (example: “United States”) to keep the words next to each other. </li></ul>
  48. 48. Conducting an Effective Search on the Web <ul><li>Check for mistakes in the spelling of your search words. </li></ul><ul><li>Use Boolean operators (or plus or minus signs depending on the search tool) to combine words. ( Click here to go to an explanation of Boolean operators). </li></ul>
  49. 49. Conducting an Effective Search on the Web <ul><li>If you do not find what you want: </li></ul><ul><ul><li>Change the search using synonyms. </li></ul></ul><ul><ul><li>Use broader or narrower terms. </li></ul></ul><ul><ul><li>Use another search tool. </li></ul></ul>
  50. 50. Netiquette on the Web <ul><li>Netiquette is the proper use of etiquette and courtesy on the WWW. </li></ul><ul><li>Click here to go to the Internet Acceptable Use Policy at Sullivan University Library. </li></ul>
  51. 51. Limitations of the Web <ul><li>Web pages can be updated, redesigned, or removed </li></ul><ul><li>Not everything can be found on the web </li></ul><ul><li>Not everything is free on the web </li></ul>
  52. 52. Limitations of the Web <ul><li>The web may not be the best place to start your research. You may choose to: </li></ul><ul><ul><li>Review encyclopedias and reference books for background information. </li></ul></ul><ul><ul><li>Look at periodical or magazine articles related to the subject. </li></ul></ul><ul><ul><li>Then… look for WWW sites to supplement or update your information. </li></ul></ul>
  53. 53. Evaluating a Web Site: <ul><li>Anyone can publish on the web. The author of a web page may be opinionated or incorrect about facts. </li></ul><ul><li>It is very important to evaluate a web site to make sure that it contains accurate and reliable information. </li></ul>
  54. 54. Evaluating a Web Site: <ul><li>Look at the main purpose of the web site: </li></ul><ul><li>Is the site informative or does it try to persuade you of something ? </li></ul>
  55. 55. Evaluating a Web Site: <ul><li>Is the web site accurate? </li></ul><ul><li>Are there errors in spelling or punctuation ? </li></ul><ul><li>Does the information appear reliable ? </li></ul>
  56. 56. <ul><li>Look at the authority of the web site. </li></ul><ul><li>For example, if the site was published anonymously , there is a possibility that this may not be a reliable site . </li></ul>Evaluating a Web Site:
  57. 57. <ul><li>Look at the point of view </li></ul><ul><li>Does the web site appear to have a bias ? </li></ul><ul><li>Many web sites are sponsored by companies or groups that have an interest in promoting a certain viewpoint </li></ul>Evaluating a Web Site:
  58. 58. <ul><li>What is the Currency? </li></ul><ul><li>Is there a date on the web site? How old is the web site? Has it been updated ? Are the links current ? </li></ul>Evaluating a Web Site:
  59. 59. The End <ul><li>This completes the Internet and World Wide Web PowerPoint presentation. </li></ul><ul><ul><li>Click here to return to the Sullivan University Library page. </li></ul></ul><ul><ul><li>OR </li></ul></ul><ul><ul><li>Click here to go to a listing of search engine links. </li></ul></ul>
  60. 60. <ul><li>Boolean operators (also called logical operators) can be used to help broaden or narrow your search. </li></ul>AND OR NOT <ul><li>There are three Boolean operators : </li></ul>Boolean Operators
  61. 61. “ AND” <ul><li>The Boolean Operator AND helps you to narrow a search. </li></ul><ul><li>Using AND between two search words specifies that both of the words must be found in the resulting web sites. </li></ul>AND “connects” the words in your search.
  62. 62. “ AND” <ul><li>Say you are looking for web sites related to tattoos and infection : </li></ul>Your search would be: TATTOOS AND INFECTION Tattoos Infection The Green shaded area would be your results. This area includes all the sites that contain the both the words tattoos AND infection.
  63. 63. “ OR” <ul><li>The OR operator B R O A D E N S your search. </li></ul><ul><li>Using OR specifies that the sites found must contain at least one of your keywords. </li></ul><ul><li>It does not have to contain both of the keywords . </li></ul>
  64. 64. “ OR” The Pink shaded area would be your results, includes all of the sites that contain the words Pepsi or Coca-Cola, either separately or together. If you are looking for information about Pepsi or Coca-Cola . Your search would be: PEPSI OR COCA-COLA Pepsi Coca-Cola
  65. 65. “ NOT” <ul><li>NOT excludes terms from a search. </li></ul><ul><li>Using NOT between two search words indicates that you are looking for the first word but not the second word. </li></ul>
  66. 66. “ NOT” If you are looking for information on desserts , but don’t want information about pies . Your search would be: desserts NOT pies Desserts Pies Your results would be in the yellow-shaded area only . You only want information related to desserts, not pies. Click here to return to the Internet presentation