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Refereed papers

  1. Real-time ambulance relocation: assessing real-time deployment strategies for ambulance relocation.
    To appear in Socio-Economic Planning Sciences, 2018.
  2. Ambulance dispatch center pilots proactive relocation policies to enhance effectiveness.
    To appear in Interfaces, 2017.
  3. Throughput and bottleneck analysis of tandem queues with nested sessions.
    To appear in Probability in the Engineering and Informational Sciences, 2017.
  4. Demand-point constrained EMS vehicle allocation problems for regions with both urban and rural areas.
    To appear in Operations Research for Health Care, 2017.
  5. EMS call center models with and without function differentiation: a comparison.
    Operations Research for Health Care, 12:16-28, 2017.
  6. Value function approximation in complex queueing systems.
    Markov Decision Processes in Practice, Chapter 2, 33-62, 2017.
  7. Optimal ambulance dispatching.
    Markov Decision Processes in Practice, Chapter 9, 269-291, 2017.
  8. Flexible staffing for call centers with non-stationary arrival rates.
    Markov Decision Processes in Practice, Chapter 19, 487-503, 2017.
  9. Compliance tables for an EMS system with two types of medical response units.
    Computers & Operations Research, 80:68-81, 2017.
  10. Predicting candidate uptake for online vacancies.
    Proceedings of Data Analytics, Venice, IARIA, 63-68, 2016.
  11. Almost squares in almost squares: solving the final instance.
    Proceedings of Data Analytics, Venice, IARIA, 69-74, 2016.
  12. Twitter analytics for the horticulture industry.
    Proceeding of Data Analytics, Venice, IARIA, 75-79, 2016.
  13. Value function discovery in Markov decision processes with evolutionary algorithms.
    IEEE Transactions on Systems, Man and Cybernetics, 46(9):1190-1201, 2016. 
  14. Dynamic ambulance dispatching: is the closest-idle policy always optimal?
    Health Care Management Science, 1-15, 2016.
  15. The effect of ambulance relocations on the performance of ambulance service providers.
    European Journal of Operational Research, 252(1):257-269, 2016.
  16. How to improve a team's position in the FIFA ranking? - A simulation study.
    Journal of Applied Statistics, 43(7):1349-1368, 2016.
  17. A simulation model for emergency medical services call centers.
    In 2015 Winter Simulation Conference (WSC), 844-855, 2015.
  18. A dynamic ambulance management model for rural areas.
    Health Care Management Science, 1-22, 2015.
  19. On the control of a queueing system with aging state information.
    Stochastic Models, 31(4):588-617, 2015.
  20. Cost-efficient allocation of additional resources for the service placement problem in next-generation Internet.
    Mathematical Problems in Engineering, article id 517409, 2015.
  21. Learning optimal policies in MDPs with value function discovery.
    Performance Evaluation Review, 43(2):7-9, 2015.
  22. An efficient heuristic for real-time ambulance redeployment.
    Operations Research for Health Care, 4:27-35, 2015.
  23. Dynamic server assignment in an extended machine-repair model.
    IIE Transactions, 47(4):392-413, 2015.
  24. Parametric replenishment policies for inventory systems with lost sales and fixed order cost.
    European Journal of Operational Research, 241(2):381-390, 2015.
  25. Optimal appointment scheduling in continuous time: the lag order approximation method.
    European Journal of Operational Research, 240(1):213-219, 2015.
  26. Modelling of trends in Twitter using retweet graph dynamics.
    In Algorithms and Models for the Web Graph, 11th International Workshop WAW, Beijing, China, 132-147 2014.
  27. Circadian Patterns in Twitter.
    Proceedings of Data Analytics, Rome, IARIA, 12-17, 2014.
  28. On structural properties of the value function for an unbounded jump Markov process with an application to a processor sharing retrial queue.
    Queueing Systems, 76(4):425-446, 2014.
  29. Markdown policies for optimizing revenue towards optimal pricing in retail.
    Journal of Business and Retail Management Research, 8(1):42-52, 2013.
  30. A simple index rule for efficient traffic splitting over parallel wireless networks with partial information.
    Performance Evaluation, 70(10):889-899, 2013.
  31. Optimal pricing in retail: a Cox regression approach.
    International Journal of Retail and Distribution Management, 41(4):311-320, 2013.
  32. The predictive power of ranking systems in association football.
    International Journal of Applied Pattern Recognition, 1(1):26-46, 2013.
  33. Optimal resource allocation in survey designs.
    European Journal of Operational Research, 226(1):115-121, 2013.
  34. Structural properties of the optimal resource allocation policy for single-queue systems.
    Annals of Operations Research, 202(1):211-233, 2013.
  35. Trend visualization on Twitter: What's hot and what's not?
    Proceedings of Data Analytics, Barcelona, 43-48, IARIA, 2012.
  36. Optimal balanced control for call centers.
    Annals of Operations Research, 201(1):39-62, 2012.
  37. Approximate dynamic programming techniques for skill-based routing in call centers.
    Probability in the Engineering and Informational Sciences, 26(4):581-591, 2012.
  38. Parameter dependent convergence bounds and complexity measure for a class of conceptual hydrological models.
    Journal of Hydroinformatics, 14(2):443-463, 2012.
  39. Optimal job splitting in parallel processor sharing queues.
    Stochastic Models, 28(1):144-166, 2012.
  40. Optimal patient and personnel scheduling policies for care-at-home service facilities.
    European Journal of Operational Research, 219(3):557-563, 2012. Special issue on Operations Research in Healthcare.
  41. Dynamic traffic splitting to parallel wireless networks with partial information: a Bayesian approach.
    Performance Evaluation, 69(1): 41-52, 2012.
  42. Optimal resource allocation in synchronized multi-tier Internet services.
    Performance Evaluation, 68(11):1072-1084, 2011.
  43. Optimal resource allocation for multi-queue systems with a shared server pool.
    Queueing Systems, 68(2):133-163, 2011.
  44. Optimal resource allocation for time-reservation systems.
    Performance Evaluation, 68(5):414-428, 2011.
  45. Optimal concurrent access strategies in mobile communication networks.
    Proceedings of the 22nd International Teletraffic Congres, 1-7, 2010.
  46. Approximate Dynamic Programming techniques for the control of time-varying queueing systems applied to call centers with abandonments and retrials.
    Probability in the Engineering and Informational Sciences, 24:27-45, 2010.
  47. Session-level load balancing for high-dimensional systems.
    IEEE Transactions on Automatic Control, 54(8):2018-2023, 2009.
  48. Dynamic thread assignment in web server performance optimization.
    Performance Evaluation, 66(6):301-310, 2009.
  49. Dynamic routing policies for multi-skill call centers.
    Probability in the Engineering and Informational Sciences, 23(1):75-99, 2009.
  50. Gamma frailty model for linkage analysis with application to interval censored migraine data.
    Biostatistics, 10:187-200, 2009.
  51. A method for approximating the variance of the sojourn times in star-shaped queueing networks.
    Stochastic Models, 24(3):487-501, 2008.
  52. A simple staffing method for multi-skill call centers.
    Manufacturing and Service Operations Management (MSOM), 10(3):421-428, 2008.
  53. Simple methods for shift scheduling in multi-skill call centers.
    Manufacturing and Service Operations Management (MSOM), 10(3):411-420, 2008.
  54. Heuristics for the design and optimization of streaming content distribution networks.
    Proceedings of IEEE GLOBECOM, Washington DC, November 2007.
  55. A multiphased approach for modeling and analysis of the BitTorrent protocol.
    Proceedings of the 27th IEEE International Conference on Distributed Computing Systems (ICDCS), Toronto, Canada, June 2007.
  56. Modeling and predicting end-to-end response times in multi-tier Internet applications.
    In: Managing Traffic Performance in Converged Networks - the Interplay between Convergent and Divergent Forces,
    The 20th International Teletraffic Congres, Lecture Notes in Computer Science, 4516:556-567, 2007.
  57. Modelling the impact of user mobility on the throughput in networks of wireless 802.11 LANs.
    Proceedings of IEEE GLOBECOM, San Francisco, December 2006.
  58. On the value function of the M/Cox(r)/1 queue.
    Journal of Applied Probability, 43(2):363-376, 2006.
  59. On the uniqueness of solutions to the Poisson equations for average cost Markov chains with unbounded cost functions.
    Mathematical Methods of Operations Research, 58:221-236, 2003.
  60. A queueing model for call blending in call centers.
    IEEE Transactions on Automatic Control, 48:1434-1438, 2003.
  61. On the structure of value functions for threshold policies in queueing models.
    Journal of Applied Probability, 40:613-622, 2003.
  62. On the value of learning for Bernoulli bandits with unknown parameters.
    IEEE Transactions on Automatic Control, 45:2135-2140, 2000.
  63. Open-loop routeing to M parallel servers with no buffers.
    Journal of Applied Probability, 37:668-684, 2000.

Other scientific papers

  • On the value of learning for Bernoulli bandits with unknown parameters.
    Proceeding of the 39th IEEE Conference on Decision and Control, 736-741, 2000.
  • Scheduling time-constrained jobs in the presence of background traffic.
    Proceeding of the 39th IEEE Conference on Decision and Control, 1421-1426, 2000.
  • Optimal routing to M parallel queues with no buffers.
    Proceedings of 37th Allerton Conference on Communication, Control and Computing, 1132-1141, 1999.
  • Optimal routing problems and multimodularity.
    Technical Report RR-3727, INRIA (Sophia-Antipolis), 1999.

Other publications


Editorial work