Title: Assessing the Impact of Jeff D. Ullman
1Assessing the Impact of Jeff D. Ullman
- Peter P. Chen
- Computer Science Dept
- Louisiana State University
- Pchen_at_lsu.edu, www.csc.lsu.edu/chen
- (Presented at Ullmans Retirement Symposium,
Stanford Univ., Dec. 6, 2002)
2Outline
- How to assess the impact of a scientist?
- Scope and Limitations of this study
- Research Methodology and Tools
- Research Results
- Personal Note
- Conclusions
3How to Assess the Impact of a Scientist?
- Usability
- Actual Implementation, Tested in Real World
- Number (or Percentage) of Users
- Citation
- Number of Citations of the Most Cited Paper
- Number of Total Citations
- Research Pioneering Leadership
- Scope, number of papers, time length,
- Number of the followers
- Education Influence
- Academic Family Tree Productivity and Paper
Citations of the nodes in the Family Tree - Book Leadership
4Scope of this Study
- Focusing on Jeff Ullman
- Many speakers today already discussed the
Usability and Research Pioneering Activity
Dimensions, we did not do such study to avoid
duplication - Concentrating on the Paper Citation and Education
Influence Dimensions (including influence on me)
5Research Methodology Tools
- Using Primarily CiteSeer, supplementing with
other databases and search engines - Discovering various problems many data errors,
inconsistencies - Analysis of the Academic Tree posted at JDUs
home page himself - Building an user interface to the database for
simple queries - Comparing with the CS faculty in 5 universities
6Education Influence of Jeff Ullman
- Academic Family Tree
- One of the Largest in Computer Science
- Probably the largest in DB
- Productivity and Citation Index of People in the
Academic Tree - One of the Most Productive and Most Cited Group
of Researchers - Book Leadership
7Analysis of Data of Ullmans Academic Family Tree
- How many generations?
- Which generation has most people?
- And what is the of people?
- What is the total number of nodes?
- Which generation is most productive and
influential (in terms of)? - Most number of publications/person
- Highest average number of citations?
- Who is the most
- Productive?
- Influential?
8Analysis of Data of Ullmans Academic Family Tree
- How many generations? 5
- Which generation has most people? 2nd
- And what is the of people? 121
- What is the total number of nodes? 249
- Which generation is most productive and
influential (in terms of)? - Most number of publications/person? 1st, 18.05
- Highest average number of citations? 1st, 163.34
- Who is the most
- Productive? Howard Siegel, 373
- Influential? Larry Petterson (1985, 3rd G.)
- 1684, Student of D. Commer/R. Sethi
9Comparisons of JDUs Family with CS Depts
- See separate spreadsheets
- (Note the spreadsheets are not linked at this
time. Will be linked in the near future)
10How is Jeff ranked in the Citation Dimension?
- CiteSeer maintains two useful statistics
- Most Cited Author
- Most Cited Documents (including books and
articles) - Warning
- CiteSeer data contains a lot of errors
- However, it is useful as a rough estimate,
particularly for not very common last names
11Cumulative Citations of Jeff Ullmans Publications
- Out of 629, 254 authors in the CiteSeer DB
- Jeff is ranked as No. 2
- The total number of citations of all Jeffs
publications is 10592
12Individual Publication Citations of Jeff Ullman
- How many Jeffs publications are ranked in the
top 200 based on CiteSeer Data as of September
2002? - Answer 5
13How many JDUs publications are ranked in the top
200?
- 12. Doc Context 1455 4 John Hopcroft
and Jeffrey Ullman. Introduction to Automata
Theory, Languages, and Computation. Addison
Wesley, 1979. - 21. Book Context 1171 2 A.V. Aho, J.E.
Hopcroft, and J.D. Ullman, The Design and
Analysis of Computer Algorithms, Addison-Wesley,
Reading, MA, 1974. - 26. Book Context 1107 1 A.V. Aho, R.
Sethi, and J.D. Ullman, Compilers Principles,
Techniques, and Tools., Addison-Wesley, 1986. - 42. Doc Context 849 Ull88 Ullman J.
D. Principles of Database and Knowledge-Base
Systems, Volumes 1 and 2. Computer Science Press,
1988. - 66. Doc Context 635 23 A.V. Aho, R.
Sethi, and J.D Ullman. Compilers Principles,
Techniques and Tools. March 1988.
14Book Leadership
- JDM is the author or co-author of
- 5 most cited books
- Many best selling textbooks
- Usually one of the first textbooks in a
particular topic/field - Model textbooks for other textbook writers to
follow
15When did I meet with JDU the First Time?
- ???
- Need the help from Dave Maier and Alberto
Mendelzon (two great historians) to dig out old
historical data and compare notes. - Between 1974 to 1978, there was a DB workshop at
Bell Lab. - JDM was there
- Al Aho was there, too (?)
16Reasons Why I am here
- As a member of DB Community
- As a person who have been benefited from his book
leadership - Jeffs book on Principles of Database Systems,
is probably the first book starting with the ER
Model first - Other DB textbooks follow
17Conclusions (1)
- JDM has made very significant impact in computer
science - Ranked No. 2 in total citations
- 5 Most cited books and articles in top-200 cited
publications - Best-Selling Book Author
- One of the largest and most productive academic
family tree - The DB community (particularly myself) has been
benefited from JDU - Today, we pay tribute to him (to make an acyclic
graph to a cyclic graph
18Conclusions (2)
- The DB community (particularly myself) has been
benefited from JDU - Today, we pay tribute to him (to make an acyclic
graph to a cyclic graph)
19Conclusions (3)
- We are here today to say to one of the greatest
computer Scientists - Dr. Jeff D. Ullman, Thank You!