Rouba Ibrahim


Contact Information

rei2101 at columbia dot edu
IEOR Department, Columbia University
500 West 120th Street 313 Mudd
New York, NY 10027
Curriculum Vitae: [PDF] 		 

My main interests are stochastic modeling, simulation, queuing science, call centers, and healthcare operations. I did my MS in operations research at Stony Brook University (2004), and my BS in mathematics at the American University of Beirut, Lebanon (2002).

 

Research

I am currently a sixth year PhD student in the IEOR department of Columbia University. My advisor is Prof. Ward Whitt.   Here are our papers (and supplements):

  • Real-Time Delay Estimation Based on Delay History. Manufacturing and Service Operations Management:11(3), Summer 2009, pp 397-415. (With Ward Whitt) [PDF].

    • Supplement to "Real-Time Delay Estimation Based on Delay History." Supporting material for paper above. [PDF].

  • Real-Time Delay Estimation in Overloaded Multiserver Queues with Abandonment. Management Science: 55(10), October 2009, pp.1729-1724. (With Ward Whitt) [PDF].

    • Supplement to "Real-Time Delay Estimation in Overloaded Multiserver Queues with Abandonment" Supporting material for paper above. [PDF].

  • Real-Time Delay Estimation in Call Centers. Proceedings of the 2008 Winter Simulation Conference.(With Ward Whitt) [PDF].

  • Real-Time Delay Estimation Based on Delay History in Many-Server Service Systems with Time-Varying Arrivals.. Submitted to Production and Operations Management. (With Ward Whitt) [PDF].

    • Supplement to "Real-Time Delay Estimation Based on Delay History in Many-Server Service Systems with Time-Varying Arrivals" Supporting material for paper above. [PDF].

  • Wait-Time Prediction for Hospital Emergency Departments.. In preparation. (With Ward Whitt)

  • Statistical Analysis for Call Center Prediction.. In preparation. (With Pat Tendick, Data Analysis Research Department, Avaya Research Labs)

     

    Teaching

    Columbia University.
      Instructor
    • Probability (undergraduate), Fall 2009
      Teaching Assistant
    • Simulation (masters), Spring 2009
    • Simulation (masters), Fall 2008
    • Monte Carlo Simulation (master's), Fall 2007
    • Simulation (masters), Spring 2007
    • Elementary Stochastic Processes (master's), Spring 2007
    • Simulation (masters), Extraordinary TA Award, Fall 2006
    • Elementary Stochastic Processes (master's), Fall 2007
    • Probability (undergraduate), Spring 2006
    • Introduction to Mathematical Programming, Extraordinary TA Award, Fall 2005
    • Stochastic Processes for Financial Engineers (masters), Summer 2005
    • Introduction to Probability and Statistics (undergraduate), Fall 2004
    Stony Brook University. 
      Instructor
    • Precalculus (undergraduate), Spring 2004
      Teaching Assistant
    • Probability and Statistics (Ph.D.), Fall 2003
    • Linear Algebra (undergraduate), Spring 2003
    • Linear Algebra (undergraduate), Fall 2002

     

    Other

  • Brief tutorial on stochastic process limits. [PDF].