Lewis Ntaimo

Publications
Influence

The Million-Variable “March” for Stochastic Combinatorial Optimization

Lewis Ntaimo, S. Sen
Computer Science
J. Glob. Optim.
1 July 2005

In this paper, we report on the solution of some of the largest stochastic combinatorial optimization problems consisting of over a million binary variables. Expand

Disjunctive Decomposition for Two-Stage Stochastic Mixed-Binary Programs with Random Recourse

Lewis Ntaimo
Mathematics, Computer Science
Oper. Res.
2010

This paper introduces disjunctive decomposition for two-stage mixed 0-1 stochastic integer programs (SIPs) with random recourse. Expand

Optimal Maintenance Strategies for Wind Turbine Systems Under Stochastic Weather Conditions

E. Byon, Lewis Ntaimo, Y. Ding
Engineering, Computer Science
IEEE Transactions on Reliability
6 May 2010

We examine optimal repair strategies for wind turbines operated under stochastic weather conditions. Expand

DEVS-FIRE: design and application of formal discrete event wildfire spread and suppression models

Xiaolin Hu, Y. Sun, Lewis Ntaimo
Engineering, Computer Science
Simul.
1 March 2012

This paper gives formal design specifications of fire spread and suppression agent models used in DEVS-FIRE and applies the model to both artificially generated and real topography, fuels and weather data for a study area located in Texas. Expand

Forest Fire Spread and Suppression in DEVS

Lewis Ntaimo, B. Zeigler, M. Vasconcelos, Bithika Khargharia
Engineering, Computer Science
Simul.
1 October 2004

In this article, the authors discuss modeling and simulation of forest fire spread and suppression using the discrete event system specification (DEVS) cell space approach in DEVSJAVA. Expand

Adaptive multicut aggregation for two-stage stochastic linear programs with recourse

S. Trukhanov, Lewis Ntaimo, A. Schaefer
Mathematics, Computer Science
Eur. J. Oper. Res.
16 October 2010

An adaptive multicut algorithm that dynamically adjusts the aggregation level of optimality cuts in the master program, is presented and tested on standard large-scale instances from the literature. Expand

DEVS-FIRE: Towards an Integrated Simulation Environment for Surface Wildfire Spread and Containment

Lewis Ntaimo, Xiaolin Hu, Y. Sun
Environmental Science, Computer Science
Simul.
1 April 2008

In this paper, the authors present an integrated simulation environment for surface wildfire spread and containment called DEVS-FIRE. Expand

A comparative study of decomposition algorithms for stochastic combinatorial optimization

Lewis Ntaimo, S. Sen
Computer Science
Comput. Optim. Appl.
1 July 2008

In this paper, we have investigated the computational performance of three decomposition algorithms for stochastic combinatorial optimization (SCO) problems. Expand

Integrated simulation and optimization for wildfire containment

Xiaolin Hu, Lewis Ntaimo
Computer Science
TOMC
1 October 2009

We present a stochastic mixed-integer programming model for initial attack to generate firefighting resource dispatch plans using as input fire spread scenario results from a standard wildfire behavior simulator. Expand

Patient and resource scheduling of multi-step medical procedures in nuclear medicine

E. Perez, Lewis Ntaimo, W. E. Wilhelm, Carla Bailey, P. McCormack
Medicine
1 July 2011

The rise in demand for specialized medical services in the U.S. has been recognized as one of the contributors to increased health care costs. Nuclear medicine is a specialized service that uses… Expand

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