Mr. Willard using the internet for research - PowerPoint Presentation

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Slide1

Mr. Willard

using the internet for researchSlide2

Search

Engines

Robots

(“Spiders,

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

Website addresses

Websites have an address called a

Uniform Resource Locator (URL)

Top-level domains

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

Book:

Author

Publisher

EditorBookstoresReviewerLibrarian

Internet:AuthorInternet

Advantage: At each level, poorly-prepared materials are weeded out

Disadvantage: No selectivity; anyone can publishSlide5

The Good stuff

Subscription

databases:

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

research suggestions

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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Mr. Willard using the internet for research - Description

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

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