1. 1 Discussion Class 1 Three Information Retrieval Systems

2. 2 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.

3. 3 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?

4. 4 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?

5. 5 How do you know if the information is reliable?

6. 6 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?

7. 7 Question 5. PubMed What is this information?

8. 8 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?

9. 9 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?

10. 10 Question 8: Fielded searching For the Library of Congress catalog (a)Explain the Guided Search (b)In what order are the search results presented?

11. 11 Question 8: Results

12. 12 Question 10: Browsing (a) What support does Ask.com give for browsing? (b)What support does the Library of Congress Catalog give for browsing?