Transcript PowerPoint

Discussion Class 1
Three Information Retrieval
Systems
1
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.
2
Question 1: Document sets
Each of the three information retrieval systems indexes a set
of documents:
(a) What documents does Ask.com index?
(b) What documents does the Library of Congress search
service index?
(c) What documents does the PubMed search service index?
3
Question 2: Red wine
What is the medical evidence that red wine is good
or bad for your health?
(a) How does Ask.com help a user answer this
question?
(b) How does Ask.com differ from Google?
4
5
How do you know if the information is reliable?
Question 4: PubMed
(a) How does PubMed order the records that are returned
from a search?
(b) What is the function of the Limit tab below?
6
Question 5. PubMed
What is this information?
7
Question 6: 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?
8
Question 7: 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 Ask.com help a user answer this question?
Under what circumstance would you use each system to find
information such as this?
9
Question 8: Fielded searching
For the Library of Congress catalog
(a) Explain the Guided Search
(b) In what order are the search results presented?
10
Question 8: Results
11
Question 10: Browsing
(a) What support does Ask.com give for browsing?
(b) What support does the Library of Congress
Catalog give for browsing?
12