Google and Beyond by lqh68203

VIEWS: 25 PAGES: 28

									Google and Beyond




   Your guide to the Web
Today we will:

 consider different types of resources and information
  available via the web
 evaluate web pages
 explore the advantages of using a variety of different
  tools to search the web
 learn the difference between a classified directory (e.g.
  RDN) and a search engine (e.g. Lycos)
 practice using a search engine (google) and classified
  directory (RDN)
What resources can you
access via the web

Books Project Gutenberg http://promo.net/pg/index.html
Journals http://www.lmu.ac.uk/lis/lss/quick_access/index.htm - Journals
Newspapers
   http://www.lmu.ac.uk/lis/lss/quick_access/newspapers/whats_avail.htmReport

Reference sources Oxford Reference Online (Off-campus access
   requires Athens password) http://www.lmu.ac.uk/lis/lss/quick_reference/

Bibliographic tools Index to Theses http://www.lmu.ac.uk/lis/lss/
Library Catalogues http://www.niss.ac.uk/lis/opacsalpha.html
What resources can you
access via the Web (2)?

Discussion groups and mailing lists Google
   Groups http://www.google.co.uk/

Databases http://www.lmu.ac.uk:8082/lco/php/search_tools.php/alpha/
Music
Multimedia resources The information Cycle
   http://www.libraries.psu.edu/crsweb/instruction/ip/infocyle.htm

Interactive resources Multi-map http://www.multimap.com/
Software
Strengths and weaknesses
of web information

Currency e.g. http://news.bbc.co.uk
Quality - varied .
Large amount of information
No consistent structure or standard -
 No single accepted control/standard or
 structure
Strengths and weaknesses
of web information (2)

Instability
Accessibility - Open 24/7
But is it really so accessible?
  Web search tools do not comprehensively
   search the web
How do I evaluate a Web
page?

Authority
Currency
Validity / Accuracy
Audience
Point of View/ Bias
Authority

Is there a contact name?
What is the authority of the author and/or
 publisher of the Web information?
Evidence of qualifications, experience?
Is there any accreditation. Has the
 information been reviewed?
 Authority (2)
   Use the structure of a URL for clues
                                               Examples of domains:
                     unique name of computer
                                                   .ac        www.lmu.ac.uk
                                                   .edu       www.harvard.edu
                                                   .gov       www.leeds.gov.uk
                                                   .org.uk    www.rspca.org.uk
                                                   .com       www.pepsi.com
                                                   .co.uk     www.cadbury.co.uk


                   http://www.lmu.ac.uk/welcome/index.htm

type of access
(mostly http://)                  clue about    individual file
                                  provider      name
                                  .ac.uk
                                  .org etc
Currency

When was the information created or
 updated?
Are the links up-to-date?
Accuracy / Validity

Are sources of information cited?
How does the content compare to other
 resources?
Does the site appear to be carefully
 edited?
Audience

Who is the information targeted at?
Is the level/type of information appropriate
 to your needs?
Point of View

What is the point of view (bias) of the site?
Is there any advertising?
Who sponsored the site?
Evaluating web
information - examples

Feline reactions to bearded men:
 http://www.improbable.com/airchives/classical/cat/cat.html



Martin Luther King sites
 http://www.martinlutherking.org/
  or
  http://thekingcenter.org/
Advantage of using different
types of tools to search the Web

Adam         EEVL      OMNI
AHDS         Excite    RDN
Altavista    Gem       SOSIG
Ask Jeeves   Go
Biz/ed       Google
BUBL         Ixquick
Cain         Lycos
EdWeb        NISS
EELS
Categories of Search Tools

Search      Classified Subject Metasearch
engine      Directory Gateway engine

Altavista   BUBL              EEVL    Ixquick


Google      NISS              OMNI    RDN


Lycos       Learning Centre   SOSIG
            Online
Categories of Search Tools

Search Engine
  Automated indexing
  Relevancy ranking
Classified Directory
  Resources selected by someone
Subject Gateway
Metasearch engine
Summary

Vast number of resources and different types of
 information.
Web information is not organised.
Existing web search tools do not
 comprehensively search the whole of the web.
4 categories of search tools. The tool that you
 choose depends on your information need. You
 may have to use more than one tool.
The difference between a Search
Engine and a Subject Gateway

To demonstrate the difference we will look
 at Lycos (www.lycos.co.uk) and the
 Resource Discovery Network - or RDN -
 (www.rdn.ac.uk)

Example search:
  House prices UK
Resource Discovery
Network (subject gateway)
32 results – all give useful information and from a
 variety of sources: company, news, government,
 educational, report, data, etc.
Lycos (search engine)
50,624 results –some useful information but
 majority of results are commercial pages, e.g.
 „how to buy a house‟ or estate agents.


  Also a lot of
  irrelevant results
  like www.gift-
  idea.co.uk/ - a
  Web site that sells
  balloon gifts!
How to use a Search
Engine properly

To demonstrate how to use a Search
 Engine properly we will look at Google
 (www.google.co.uk)
Tips for using Google
properly
Always go to the UK based Google site -
 .co.uk and not .com
No need to include AND between search
 terms
Searches are not case sensitive
You can do simple OR searches
To exclude words from your search enter
 a minus sign ( – ) immediately before a
 term or phrase
Tips for using Google
properly

You can search for phrases by enclosing
 the search term in quotes: “ ”
Google ignores very short and/or common
 words. To search for something that
 contains short words enclose the words in
 quotes to make a phrase
Using the Advanced
Search in Google
You can use the Advanced Search screen to
 narrow down your results further:
Advanced search features

 You can specify how many results to display
 You can limit your results to a specific language
 You can choose to search for results in a specific
  file format
 You can specify the date of when the Web pages
  were last updated
 You can change where your search term occurs in
  the Web page
 You may request that all of the pages come from a
  site or certain domain
 Interpreting your Google
 results

      A
                                              B
     C
                                    D     E
               F      G H   I
          J
                                K
A = Statistics Bar     B = Page Title             C = Text below the Title
D = Description        E = Category               F = URL of Result
G = Size               H = Cached                 I = Similar Pages
J = Indented Result    K = More Results
Further Help

Useful online help page - Google Help Central
Other Know-it-Alls
  Assignments – finding and using information
  Dissertations – successful research
Searching the Internet pages on LCO and the
 Information and Research section of S4L.
Learning Adviser

								
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