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Search strategies
Search strategies
Search strategies
Search strategies
Search strategies
Search strategies
Search strategies
Search strategies
Search strategies
Search strategies
Search strategies
Search strategies
Search strategies
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Search strategies

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Transcript

  • 1. An Introduction To P OWERSEARCHING ON THE WORLD WIDE WEB Curriculum Services Associates
  • 2. W orld W ide W eb at a glance!
    • Internet – a collection of tens of thousands of computer networks that exchange information according to some agreed-upon, uniform rules or protocols.
    • WWW . – a large collection of information accessible through the Internet.
    • To use the Internet and WWW effectively one needs to know how to find and use the services, tools, and programs to access resources and information.
  • 3. Using the WWW for Research
    • Directories
    • Search Engines
    • Meta-Search Tools
    • Virtual Libraries
    • Specialized Databases
    • FTP Archives
    • Email Discussion Groups
    • Usenet Groups
  • 4. Directories
    • A general collection of Internet and WWW resources, arranged by subject
    • Created and maintained by people
    • Browse by subject or search by keyword.
    • Generally support search features.
  • 5. Search Engines
    • Most powerful tool on the WWW.
    • Created and maintained by computer programs.
    • Index the entire text of each document.
    • Support Search Features
      • Boolean Operators
      • Phrase Searching
      • Proximity Searching
      • Truncation
      • Wildcards
      • Field Searching
      • Case Sensitivity
      • Concept Searching
      • Limiting by Date
  • 6. Meta-Search Tools
    • Allows the user to use several search engines at once.
    • Parallel search tools allow user to search several sites simultaneously.
    • All in one search tools list WWW sites along with search formats so user can search one at a time.
    • Major drawback – individual databases are not used to their fullest capabilities.
  • 7. Virtual Libraries
    • Directories or subject catalogs consisting of selected Web resources.
    • Knowledgeable people choose the sites.
    • High probability of finding relevant resources.
    • Classroom teacher can feel are students relatively safe because sites are carefully selected.
  • 8. Specialized Databases
    • Contains comprehensive collections of hyperlinks in a particular subject area.
    • May be self-contained searchable indexes made available on the WWW.
    • Provides user with reliable up-to-date information while saving time.
    • Supports Search Features.
  • 9. FTP Archives
    • Collections of files in various formats available on the Web.
    • Publicly available through FTP Archives.
    • Many FTP files are shareware or freeware and may be used and distributed at no cost.
  • 10. E-mail Discussion Groups
    • E-mail is most popular use of the Internet.
    • People with common interests form groups.
    • Interest Groups, Mailing Lists, or Listservs based on a specific topic.
  • 11. Usenet Newsgroups
    • Collections of groups discussions, questions, answers, and other information that have been shared through the Internet.
  • 12. 10 Steps to a Successful Search
    • Identify important concepts of search.
    • Carefully choose keywords.
    • Determine other variations of keywords.
    • Determine which search features may apply.
    • Choose a search engine
    • Identify search instructions on search engine’s home page.
    • Create a search expression appropriate for the search engine.
    • Evaluate the results.
    • Modify the results if necessary.
    • Try the same search in a different search engine.
  • 13. Evaluating Information Found on the WWW
    • The WWW provides a vast amount of information without indicators of quality or accuracy.
    • Evaluation Guidelines
      • Who is the author or institution?
      • How current is the information?
      • Who is the audience?
      • Is the content accurate and objective?
      • What is the purpose of the information

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