the lecture is aimed at simplifying the internet resources, search engines, search techniques and success and failures of searching the desired information
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Internet Resources
1. Internet resources retrieval :
Search Engines ,OPAC & WebOPAC,
and retrieval techniques
DR NIRMAL KUMAR SWAIN
Associate Professor
Dept of Lib. & Inf. Science
Maharshi Dayanand University
Rohtak 124001
February 16, 20171 NIRMAL KUMAR SWAIN
2. Internet resources retrieval :
Search Engines ,OPAC &
WebOPAC, and retrieval
techniques
Lecture delivered At
Training for Teacher Educators of Western Region on
Technique of Using Digital Libraries ,
Feb 17-21, 2017
Regional Institute of Education (RIE), NCERT
Bhopal
Feb 17, 2017
February 16, 20172 NIRMAL KUMAR SWAIN
3. Topics to be discussed
Library as an Information System
Internet as massive source of
information
Collected , arranged and processed
hosted in and by Search Engines
Information arranged in its own way not
known to the users
February 16, 20173 NIRMAL KUMAR SWAIN
4. Topics to be discussed
Concept of OPAC
Concept of WebOPAC
Search Engines
Internet simplied
February 16, 20174 NIRMAL KUMAR SWAIN
5. Cont
The users search and retrieve his own
information
Sometimes at instant success, late or
slow success, partially success and even
no success or failure
Develop his own experience or gets
training to search and retrieved desired
information
February 16, 20175 NIRMAL KUMAR SWAIN
6. Story speaks different story
Information is gathered in a specific way,
collected, and processed with definitive
tagging by the search engines
Sometimes the desired information and
found and retrieved but very late and after
trying hard, which consumes time.
February 16, 20176 NIRMAL KUMAR SWAIN
7. Subject tagging
Each information available in the
Internet is tagged in some way or
with use of certain techniques so
that people can search by the
same term and retrieve the
information.
February 16, 20177 NIRMAL KUMAR SWAIN
8. Key words
Difficult to know certain key words under
which the subjects are tagged. Still with
experience someone can develop a
consensus over the use of search term.
The search terms can not be full
tamed. The search engines use
hyperlink to take the users to different
locations.
February 16, 20178 NIRMAL KUMAR SWAIN
9. Search techniques matters
Even with the use of search terms techniques
matters. What exactly the users want.
There are many search techniques. Most
popular is Boolean model which use AND,
NOT, OR for searching the Internet.
February 16, 20179 NIRMAL KUMAR SWAIN
10. Boolean
AND (narrows the search by retrieving only
records containing both keywords used in the
search statement)
OR (broadens your search by retrieving either
one or more of the keywords used in the
search statement)
NOT (excludes records containing the second
keyword in your search statement)
February 16, 201710 NIRMAL KUMAR SWAIN
11. The AND operator
AND links terms together in a way that makes
your search more narrow. It tells the computer
that you want records that contain all the words
you specify.
For instance, if you search only records
containing the words dog and cat, your
results will return only those articles containing
BOTH terms.
February 16, 201711 NIRMAL KUMAR SWAIN
13. The OR operator
OR broadens, or widens, your results.
For instance, a search on dog or cat will give
you records that not only have both dog and
cat in them, but also the records that contain
only dog and only cat.
Therefore, you will obtain more results by using
the OR operator.
February 16, 201713 NIRMAL KUMAR SWAIN
14. OR
The purple space represents all the records that
would be returned by the search "dog or cat."
February 16, 201714 NIRMAL KUMAR SWAIN
15. NOT
The purple spaces represent all the records that would be
returned by the search "dog not cat," and "cat not dog. Note
that dog not cat gives much different results that cat not
dog.
February 16, 201715 NIRMAL KUMAR SWAIN