Transcript presentation source

CPT 499 Internet Skills for
Educators
Session Three
Class Notes
Objectives
Use the Search Button on the
browser to access a search engine
List several search engines
Use multiple search engines in a
query
Objectives
Distinguish between Boolean
operators: And, Or, Not
Explain the process of searching the
Web
Describe the structure of the URL
Objectives
Use the Find Command under the
edit menu
Use the Save Command under the
edit menu
Download an image or document from
the Web
Search Engines
Search Engines provide a more productive
means of surfing the Web
A search engine is a program that handle
queries and provide a search form for
the user to enter search criteria and
locate Web resources.
The search engine scans its database to
see which documents are related to the
key word(s) requested.
Search Engines
The results page will show you how many
hits (documents) it found on the
database.
The results page will list titles of the
documents it finds, and a hyperlink to
each document.
Each engine uses a special program known
as a spider to automatically search the
Web on a periodic basis, looking for new
Search Engines
The larger the database the greater the
number of hits.
The search engine you choose to use is up
to your own personal preference.
Search Engines
SOME COMMON WEB SERARCH
ENGINES
Site
URL
Yahoo
Lycos
WebCrawler
AltaVista
InfoSeek
Metacrawler
Open Text
http://www.yahoo.com
http://www.lycos.com
http://www.webcrawler.com
http://www.altavista.digital.com
http://www.infoseek.com
http://www.metacrawler.com
http://www.opentext.com
Search Engines
All queries are combinations of the logical
(Boolean) operators.
The Boolean operators are AND, OR, and
NOT
The way in which Boolean operators are
specified depends on the search engine.
Search Engines
If you are unsure check the online help
provided with the search engine.
Queries can be conducted in the form of
a key word search.
Search Engines
A program which systematically
searches Web for documents on a
specific topic
Uses a key word(s) as a query
Search Engines
Several search engines available
Each search engine has its own
database
No search engine is best
Search Engines
Uses Boolean (logical) operators
Returns hits (matches) or documents
once search has been submitted
Search Button
Usually offers several prominent
search engines for user’s choice
More engines are usually available on
the page either by scrolling on the
page on through links to other
engines
Search Button
Can construct key word(s) search
Can use category structure
established by search engine
Search Button
Browser logo and status bar keeps
user informed of the progress of a
search
Popular Search Engines
Alta Vista
www.altavista.digital.com
InfoSeek
www.infoseek.com
Lycos
www.lycos.com
Yahoo
www.yahoo.com
Metacrawler
www.metacrawler.com
Search Rules
Specify Boolean operators
And -- includes all findings of all
keyword(s)
Or ---- looks for only one of the
specified key word(s)
Not -- allows user to exclude
certain key word(s)
Search Techniques
Use multiple search engines
Use online help about search criteria
used for the engine selected
Bookmark Command
Bookmarks allow the user to return
to a site without repeating a search
Pull down Bookmark and click Add
Bookmark to save URL
Find Command
Find allows user to enter a specific
character string within a long
document
Enables user to find information
quicker
Save Command
Save allows user to save and
download (FTP) images and
documents from the Web
Organization Names
gov government
edu education
org nonprofit or
clearinghouse
com commercial
net network
mil military