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using the internet for researchSlide2
Webcrawlers”)No more human selectionCollection rather than selection—everything on the Web is included in a searchShow Google and show number of sites indexed (at bottom of front page) and number of hits for a key word (e.g. “Columbus”).
A search engine is a program designed to search for documents on the Internet using keywords. Examples: Google, Bing, Infotopia
Uses software robots called “spiders” to search millions of pages on the World Wide Web
Stores information compiled by spiders into a huge online library called an index
Fetches results from indexes when a user types in keywords
Sorts and displays information using a complex program called an algorithmSlide3
Websites have an address called a
Uniform Resource Locator (URL)
tell you what kind of person or organization runs the site: .com = commercial
.org = organization (usually non-profit).edu = educational institution (usually college).gov = government agency
.edu and .gov are restricted; others are available to anyone who wants to use them
Personal web pages: the tilde (~)Slide4
The Publication Process
Advantage: At each level, poorly-prepared materials are weeded out
Disadvantage: No selectivity; anyone can publishSlide5
The Good stuff
Include journals, magazines
, newspapers, books and more. Most are available via the Internet, but aren’t freely available to the public. Libraries make them available, though.
Subject directories: Allow you to browse Internet resources by subject category. They are created and maintained by human editors (librarians) that review and select sites based on usefulness.Slide6
Remember - not everything on the Internet is reliable
To get familiar about a topic, read a book first
Check facts with other sources
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Search Engines Robots Spiders Webcrawlers No more human selection Collection rather than selectioneverything on the Web is included in a search Show Google and show number of sites indexed at bottom of front page and number of hits for a key word eg Columbus ID: 729394 Download Presentation