Whereis

the

Money?

INTERNET SEARCHING FOR SMARTIES

“Seek and ye shall find”

HA HA HA

GOALS OF THE SEMINAR

Understand the nature of the web.

Learn about the different types of search engines and how they function.

Discover which search engines are appropriate for your varying needs.

Learn how to evaluate websites.

Learn how to bookmark websites for later retrieval.

GOALS OF THE SEMINAR (CONT.)

Be able to understand and follow these directions:

“Begin with a phrase search, progress to using Boolean and proximity operators with field to top-level and geographic domain limiters, and

end with link checking of a selected result. These link checks will then be further limited

using the Boolean AND operator with a keyword/phrase and a top-level domain.”

SEARCH ENGINES AND THE WORLD-WIDE-WEB

THE INVISIBLE WEB

o What is the nature of the Invisible Web?o What can be found on the Invisible web?

Databases • (up to 90% of the invisible web is located in databases

Forms to be completed Current material Password-protected material

o Why is knowledge of the invisible web so important?

REMEMBER…

The information you need determines what search engines you will use.

REMEMBER…

When completeness is important,searching requires the use of several

tools.

(Require your students to use at least three separate search tools when researching a topic)

GENERAL-PURPOSE SEARCH ENGINES

GENERAL-PURPOSE SEARCH ENGINESo Provides text-matched searching of

its own crawler-built database of text-indexed Web pages.

o Search results are ranked according to internal relevance-ranking algorithms.

o Provides searchable access to the text of millions of freely accessible Web pages.

o Ex: google, yahoo, bing, gigablast, cuil

GENERAL-PURPOSE SEARCH ENGINESo Why are general-purpose search

engines so popular? Ease-of-use Convenient Time-saving Availability of full-text

GENERAL-PURPOSE SEARCH ENGINESo Problems associated with using

general-purpose search engines exclusively: TMI (too much information) Lots of irrelevant or inappropriate

information Many results may be of limited use Advanced features are not used Tendency to look only at first ten results Access is preferred over quality

META-SEARCH ENGINES

META-SEARCH ENGINES

o A search tool that does not have its own database.

o Sends queries to several other search engines and then complies the results on a single screen or in multiple frames or windows.

o Ex: clusty, dogpile, surfwax, copernic

META-SEARCH ENGINES

o Benefits of meta-search engines: Searches in many different search engines,

and thus is not tied down to one database. Enhance coverage and relevancy of the

search. Can provide more up-to-date results Some meta-search engines eliminate

duplicate records. Some meta-search engines sort pages into

topics.

DATABASE & DIRECTORIES SEARCH ENGINE

DATABASE & DIRECTORIES SEARCH ENGINEo A classified listing of Web sites, in which

brief records for sites are placed within an appropriate hierarchical taxonomy.

o Classification of sites is typically done by human editors, and the sites are searchable by category names, site titles, and brief site descriptions.

o Ex: google scholar, ipl, dmoz, vlib, yahoo directory

DATABASE & DIRECTORIES SEARCH ENGINEo Benefits of databases and directories

Search results are generally a lot more reliable because classification is done by human editors.

Easier to find more relevant information Information found in databases may not be

indexed by general-purpose (and meta-) search engines.

Hierarchical layout allows for targeted searching.

IN SHORT…

DIG DEEPERSEARCH FURTHERDISCOVER

MORE!

SO……………………….

Whereis

the

Money?