Transcript PowerPoint

Discussion Class 1
Three Information Retrieval
Systems
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Discussion Classes
Format:
Questions.
Ask a member of the class to answer.
Provide opportunity for others to comment.
When answering:
Stand up.
Give your name. Make sure that the TA hears it.
Speak clearly so that all the class can hear.
Suggestions:
Do not be shy at presenting partial answers.
Differing viewpoints are welcome.
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Question 1: Document sets
Each of the three information retrieval systems indexes a set
of documents:
(a) What documents does Google index?
(b) What documents does the Library of Congress catalog
index?
(c) What documents does Medline index?
In each case are you searching surrogates or the full text of
documents?
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Question 2: Red wine
What is the medical evidence that red wine is good
or bad for your health?
(a) How does Google help a user answer this question?
(b) How does Medline help a user answer this
question?
Under what circumstance would you use each system
to find information such as this?
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Question 3: PubMed
(a) How does PubMed order the records that are returned
from a search?
(b) What are the functions of the various tabs below?
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How do you know if the information is reliable?
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Question 5: White wine
How would I search to compare the health differences between
white and red wine?
How would I discover if a result that was published in 1996 had
been confirmed or disproved by a later study?
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Question 6: Palestine
What in history led to the current turmoil in Palestine and
the neighboring countries?
(a) How does the Library of Congress Catalog help a user
answer this question?
(b) How does Google help a user answer this question?
Under what circumstance would you use each system to find
information such as this?
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Question 7: Fielded searching
For the Library of Congress catalog
(a) Is it full text or fielded searching?
(b) What fields can you search on?
How was the fielded information created (by author, by
professional cataloger/indexer, by algorithm, etc.)?
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Question 8: Results
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Question 9: Browsing
(a) What support does Google give for browsing?
(b) What support does the Library of Congress
Catalog give for browsing?
(c) What support does PubMed give for browsing?
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