• Share
  • Email
  • Embed
  • Like
  • Save
  • Private Content

Loading…

Flash Player 9 (or above) is needed to view presentations.
We have detected that you do not have it on your computer. To install it, go here.

Like this presentation? Why not share!

Internet searchingnewver

on

  • 437 views

 

Statistics

Views

Total Views
437
Views on SlideShare
437
Embed Views
0

Actions

Likes
0
Downloads
3
Comments
0

0 Embeds 0

No embeds

Accessibility

Categories

Upload Details

Uploaded via as Microsoft PowerPoint

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment
  • Explain that the information on the web won’t be arranged in any way (very different from library arrangement)

Internet searchingnewver Internet searchingnewver Presentation Transcript

  • Internet Searching
  • Group Members
    Nashfa
    1
    Zabir
    2
    Visala
    3
    Azhar
    4
    Zaha
    5
  • Contents
    Introduction
    1
    Directories
    2
    Search Engines
    3
    MetaSearch Engines
    4
    Search Strategies
    5
  • Introduction
    With the arrival of the WWW came the widespread availability of online information
    Answers to your questions are somewhere on the web, but how do you locate them?
  • DIRECTORIES
    Method of finding and organizing web information
    Offers a hierarchical representation of hyperlinks to web pages and presentations broken down to topics and subtopics
    Review and classified by human editors
  • Directories : classification
    General
    Specialized
    • Also called web directory or subject directory
    • Top level provides a wide range of broad topics. E.g. Music / Entertainment.
    • Also called subject guides or gateway pages
    • Deals with a variety of topics. E.g. law, medicine.
    Benefits
    Easy to use
    Need not know what you are looking for
  • Search Engines : introduction
    A computer program
    Submit a query describing the information you want to locate
    Searches its databases to try and match your query
    Collates and returns a list of URL’s which matches your query
    Permits you to revise and resubmit a query
  • Search engines : classification
    General
    Specialized
    • Also called vertical search engine or a topic search engine
    • Retrieves information from a database that contains information on a wide variety of topics
    • Provides in-depth information on specific topics that may be valuable
    • Exists for a multitude of topics
    • MP3s
    • Shopping
    • News etc
    Not as easy to use as directories. WHY??
  • Metasearch Engines
    Does not have their own database of information
    Calls many search engines to do the actual work
    Advantage:
    You can access a number of different search engines with a single query
    Disadvantage:
    You will get a lot of results which will not be of interest to you. Therefore you will spend a lot of time evaluating the results and deciding which link to follow
  • Directories and search engines : Popular
    MetaSearch Engines
    Directories
    Search Engines
  • Boolean Queries : AND operator
    B
    A
    B
    A
    A
    B
    B
    A
    A
    A
    B
    B
    A
    A
    B
    B
    B
    A
    B
    A
    A
    B
    B
    A
    A
    B
    A
    B
  • Boolean Queries : OR operator
    B
    A
    B
    A
    A
    B
    B
    A
    A
    A
    B
    B
    A
    A
    B
    B
    B
    A
    B
    A
    A
    B
    B
    A
    A
    B
    A
    B
  • Search Strategies
    Determine which search engine
    Possesses a user-friendly interface
    Has a easy-to-understand, comprehensive documentation
    Is convenient to access; that is you do not have to wait several minutes before being able to submit a query
    Contains a large database
    Does a good job in assigning relevancy scores
  • Exercise
  • THANK YOU