Ellis L. Johnson

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Ellis Johnson
Born (1938-07-26) July 26, 1938 (age 85)
Citizenship
Georgia Institute of Technology
Thomas J. Watson Research Center

Ellis Lane Johnson is the Professor Emeritus and the Coca-Cola Chaired Professor in the

Georgia Institute of Technology in Atlanta, Georgia
.

In 1988, Johnson was elected a member of the National Academy of Engineering for fundamental contributions to discrete optimization and software design, and its practical applications to distribution and manufacturing systems.

Early life and education

Johnson received a B.A. in mathematics at Georgia Tech and earned his Ph.D. in

University of California at Berkeley in 1965.[1] He was student of George Dantzig
.

Career

In the 1950s, Dr. Ellis Johnson served as director of the Operations Research Office of the

Humboldt Senior Scientist Award
.

From 1990 to 1993, Johnson began teaching and conducting research at Georgia Tech, where he co-founded and co-directed the Logistics Engineering Center with Professor George Nemhauser.[3] He joined the Georgia Tech faculty in 1994.

Johnson's research interests in logistics include crew scheduling and real-time repair, fleet assignment and routing, distribution planning, network problems, and combinatorial optimization.

Awards and honors

Johnson has received a number of awards, including the following:[3]

John von Neumann Theory Prize

Johnson received the John von Neumann Theory Prize jointly with Manfred W. Padberg in recognition of his fundamental contributions to integer programming and combinatorial optimization. Their work combines theory with algorithm development, computational testing, and solution of hard real-world problems in the best tradition of Operations Research and the Management Sciences. In their joint work with Crowder and in subsequent work with others, they showed how to formulate and solve efficiently very large-scale practical 0-1 programs with important applications in industry and transportation.[4]

The selection committee cited among Johnson's contribution three important and influential papers he produced in the early seventies—two of them with

Ralph Gomory
—which developed and extended in significant ways the group theoretic approach to integer programming pioneered by Gomory. In particular, Johnson showed how the approach can be extended to the case of mixed integer programs. As an outgrowth of this work, Johnson contributed decisively to the development of what became known as the subadditive approach to integer programming. Still in the seventies, in a seminal paper co-authored with
traveling salesman problem
in which the tour is supposed to traverse vertices rather than edges, helped focus attention on the phenomenon so typical of combinatorial structures: two seemingly very similar problems turn out in reality to be vastly different.

References

  1. ^ a b "Ellis Johnson: Deep Roots at Georgia Tech". H. Milton Stewart School of Industrial and Systems Engineering. 2010-09-07. Archived from the original on 2010-09-29. Retrieved 2011-07-09.
  2. doi:10.1287/opre.50.1.52.17805
    .
  3. ^ a b "H.Milton Stewart School of ISyE Faculty". Archived from the original on 2009-10-14. Retrieved 2009-11-20.
  4. ^ "ISyE Faculty Named Inaugural SIAM Fellows". Archived from the original on 2012-02-20.

External links

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