Publications

Books & Parts of Books

  1. Alexopoulos, C., Kang, K., Lilegdon, W. R. and Goldsman, D. (editors). Proceedings of the 1995 Winter Simulation Conference. IEEE, Piscataway, New Jersey, 1995.
  2. Alexopoulos, C. and Seila, A. F. Output data analysis, in Handbook of Simulation (Chapter 7), ed. Jerry Banks, 225-272, John Wiley & Sons, New York, 1998.
  3. Alexopoulos, C., Goldsman, D., Tsui, K.-L., and Jiang, W. SPC monitoring and variance estimation, in Frontiers in Statistical Quality Control (vol. 7), 194-210, eds. H.-J. Lenz and P.-Th. Wilrich, Physica-Verlag, Heidelberg, Germany, 2004.
  4. Alexopoulos, C., Goldsman, D., and Serfozo, R. F. Stationary processes: Statistical estimation, in Encyclopedia of Statistical Sciences, 2nd Edition, pp. 7991-8006, eds. N. Balakrishnan, C. Read, and B. Vidakovic, John Wiley & Sons, New York, 2006.
  5. Alexopoulos, C. Statistical estimation in computer simulation, in Elsevier Handbooks in Operations Research and Management Science: Simulation (Chapter 8), 193-223, eds. S. G. Henderson and B. L. Nelson, Elsevier Science, Amsterdam, 2006.
  6. Aktaran-Kalaycı, T., Alexopoulos, C., Goldsman, D., and Wilson, J. R. Optimal linear combinations of overlapping variance estimators for steady-state simulation, in Advancing the Frontiers of Simulation: A Festschrift in Honor of George Samuel Fishman, 299-337, eds. C. Alexopoulos, D. Goldsman, and J. R. Wilson, Springer-Verlag, New York, 2009.
  7. Alexopoulos, C., Goldsman, D., and Wilson, J. R. Advancing the Frontiers of Simulation: A Festschrift in Honor of George Samuel Fishman, Springer, New York, 2009.
  8. Alexopoulos, C., Goldsman, D., and Wilson, J. R. George Fishman’s professional career, in Advancing the Frontiers of Simulation: A Festschrift in Honor of George Samuel Fishman, 1-21, eds. C. Alexopoulos, D. Goldsman, and J. R. Wilson, Springer, New York, 2009.
  9. Alexopoulos, C., Goldsman, D., and Wilson, J. R. A conversation with George Fishman, in Advancing the Frontiers of Simulation: A Festschrift in Honor of George Samuel Fishman, 23-45, eds. C. Alexopoulos, D. Goldsman, and J. R. Wilson, Springer, New York, 2009.
  10. Dingeç K. D, Alexopoulos, C., Goldsman, D., Lolos, A., and Wilson J. R. Geometric moment-contraction of G/G/1 waiting times. Botev, Z., Keller, A., Lemieux, C., and Tuffin B., eds., Advances in Modeling and Simulation: Festschrift for Pierre L’Ecuyer, Chapter 6, forthcoming, Springer New York, 2022.

Publications in Archival Journals

  1. Griffin, P. and Alexopoulos, C. Point pattern recognition by centroid bounding, IEEE Transactions on Systems, Man and Cybernetics, vol. l9, pp. l274-l276, l989.
  2. Alexopoulos, C. and Fishman, G. S. Characterizing stochastic flow networks using the Monte Carlo method, Networks, vol. 21, pp. 775-798, 1991.
  3. Alexopoulos, C. and Fishman, G. S. Capacity expansion in stochastic flow networks, Probability in the Engineering and Informational Sciences, vol. 6, pp. 99-118, 1992.
  4. Alexopoulos, C. and Griffin, P. G. Path planning for a mobile robot, IEEE Transactions on Systems, Man and Cybernetics, vol. 22, pp. 318-322, 1992.
  5. Alexopoulos, C. and Fishman, G. S. Sensitivity analysis in stochastic flow networks using the Monte Carlo method, Networks, vol. 23, pp. 605-621, 1993.
  6. Alexopoulos, C. Distribution-free confidence intervals for conditional probabilities and ratios of expectations, Management Science, vol. 40, pp. 1748-1763, 1994.
  7. Alexopoulos, C. A Note on state space decomposition methods for analyzing stochastic flow networks, IEEE Transactions on Reliability, vol. 44, pp. 354-357, June 1995.
  8. Alexopoulos, C. and Seila, A. F. A Conservative method for selecting the best simulated system, Operations Research Letters, vol. 19, pp. 143-150, 1996.
  9. Alexopoulos, C. State space partitioning methods for stochastic shortest path problems, Networks, vol. 30, pp. 9-21, 1997.
  10. Alexopoulos, C., El-Tannir, A., and Serfozo, R. F. Partition-balanced Markov processes, Operations Research, vol. 47, no. 1, pp. 124-130, 1999.
  11. Alexopoulos, C., Provan, J. S., Ratliff, H. D., and Stutzman, R. Minimal connected enclosures on an embedded planar graph, Discrete Applied Mathematics, vol. 91, pp. 25-38, 1999.
  12. Alexopoulos, C. and Jacobson, J. A. State space partitioning algorithms for stochastic systems, with applications to minimum spanning trees, Networks, vol. 35, no. 2, pp. 118-138, 2000.
  13. Alexopoulos, C. and Shultes, B. C. Estimating reliability measures of highly-dependable Markovian systems using balanced likelihood ratios, IEEE Transactions on Reliability, vol. 50, no. 3, pp. 265-280, 2001.
    (Manuscript with table and figure captions missing from archival version.)
  14. Alexopoulos, C., Goldsman, D., and Tokol, G. Properties of batched quadratic-form variance parameter estimators for simulations, INFORMS Journal on Computing, vol. 13, no. 2, pp. 149-156, 2001.
  15. Fontanesi, J., Alexopoulos, C., Goldsman, D., Sawyer, M., De Guire M., Kopald, D., and Holcomb, K. Non-punctual patients: Planning for variability in appointment arrival times, Journal of Medical Practice Management, vol. 18, pp. 14-18, 2002.
  16. Alexopoulos, C. and Goldsman, D. To batch or not to batch?, ACM Transactions on Modeling and Computer Simulation, vol. 14, 76-114, 2004. Winner of INFORMS Simulation Society 2007 Outstanding Simulation Publication Award.
  17. Fontanesi, J., Goldsman, D., Alexopoulos, C., Hill, L., Kopald, D., and Holcomb, K. The (mis)application of Management Science in medicine: A flawed concept, Journal of Medical Practice Management, , vol. 20, no. 2, 110-113, September-October 2004.
  18. Steiger, N. M., Lada, E. K., Wilson, J. R., Joines, J. A., Alexopoulos, C., and Goldsman, D. ASAP3: A Batch Means Procedure for Steady-State Simulation Analysis, ACM Transactions on Modeling and Computer Simulation, vol. 15, no. 1, 39-73, 2005.
  19. Alexopoulos, C., Andradóttir, S., Argon, N. T., and Goldsman, D. Replicated batch means variance estimators in the presence of an initial transient, ACM Transactions on Modeling and Computer Simulation, vol. 16, no. 4, pp. 317-328, 2006.
  20. Daly, M. S., and Alexopoulos, C. State space partition techniques for multiterminal flows in stochastic networks, Networks, vol. 48, no. 2, pp. 90-111, 2006.
  21. Aktaran-Kalaycı, T., Alexopoulos, C., Argon, N. T., Goldsman, D., and Wilson, J. R. Exact expected values of variance estimators in steady-state simulation, Naval Research Logistics, vol. 54, no. 4, pp. 397-410, 2007.
  22. Alexopoulos, C., Argon, N. T., Goldsman, D., Steiger, N. M., Tokol, G., and Wilson, J. R. Efficient computation of overlapping variance estimators for simulation, INFORMS Journal on Computing, vol. 19, no. 3, pp. 314-327, 2007.
  23. Alexopoulos, C., Argon, N. T., Goldsman, D., Tokol, G., and Wilson, J. R. Overlapping variance estimators for simulation, Operations Research, vol. 55, no. 6, pp. 1090-1103, 2007.
  24. Alexopoulos, A., Goldsman, D., Fontanesi, J., Kopald, D., and Wilson, J. R. Modeling patient arrivals in community clinics, Omega, vol. 36, no. 1, 33-43, 2008.
  25. Kim, S.-H., Alexopoulos, C., Tsui, K.-L., and Wilson, J. R. A distribution-free tabular CUSUM chart for autocorrelated data, IIE Transactions, vol. 39, pp. 317-330, 2007.
  26. Alexopoulos, C., Chang, B.-Y., Goldsman, D., Lee, S., and Marshall, W. S. Overcoming negativity problems for Cramér-von Mises variance estimators, International Journal of Simulation and Process Modelling, vol. 4, no. 1, pp. 1-6, 2008.
  27. Antonini, C., Alexopoulos, C., Goldsman, D., and Wilson, J. R., Area variance estimators for simulation using folded standardized time series, IIE Transactions, vol. 41, no. 2, 134-144, 2008. Winner of 2010 Best Paper Award in Operations Engineering and Analysis of IIE Transactions.
  28. Lee, J., Alexopoulos, C., Goldsman D., Kim, S.-H., Tsui, K.-L., and Wilson J. R. Monitoring autocorrelated processes using a distribution-free Tabular CUSUM chart with automated variance estimation, IIE Transactions, vol. 41, pp. 979-994, 2009 .
  29. Alexopoulos, C., Antonini, C., Goldsman, D., and Meterelliyoz, M. Performance of folded variance estimators for simulation, ACM Transactions on Modeling and Computer Simulation, vol. 20, no. 2, article 11, 2010 .
  30. Huang, Y.-L., Alexopoulos, C., Fujimoto, R. M., and Hunter, M. P. Ad hoc distributed simulation of queueing networks, 24th ACM/IEEE/SCS Workshop on Principles of Advanced and Distributed Simulation (PADS 2010), 57–64, Atlanta, Georgia, 2010. Winner of Best Paper Award.
  31. Huang, Y.-L., Alexopoulos, C., Fujimoto, R. M., and Hunter, M. P. On the accuracy of ad hoc distributed simulations for open queueing networks,” 25th ACM/IEEE/SCS Workshop on Principles of Advanced and Distributed Simulation (PADS 2011), pp. 163-168, Nice, France, 2011.
  32. Huang, Y.-L., Alexopoulos, C., Fujimoto, R. M., and Hunter, M. P. Ad hoc distributed simulation methodology for open queueing networks, Simulation: Transactions of The Society for Modeling and Simulation International, appeared online, September 2011. (http://sim.sagepub.com/content/early/2011/09/01/0037549711408486.abstract).
  33. Bai, L., Alexopoulos, C., Ferguson, M., and Tsui, K-L. A simple and robust batch-ordering inventory policy under incomplete demand knowledge, Computers and Industrial Engineering, vol. 63, no. 1, pp. 343–353, 2012 (www.sciencedirect.com/science/article/pii/S0360835212000629).
  34. Meterelliyioz, M., Alexopoulos, C. and Goldsman, D. Folded overlapping area estimators for simulation, European Journal of Operational Research, vol. 220, no. 1, pp. 135–146, 2012.
  35. Argon, N. T, Andradóttír, S., Alexopoulos, C., and Goldsman, D. Steady-state simulation with replication-dependent initial transients: Analysis and examples, INFORMS Journal on Computing, vol. 25, pp. 177–191, 2013.
  36. Meterelliyioz, M., Alexopoulos, C., Goldsman, D., and Aktaran-Kalaycı, T. Reflected variance estimators for simulation, IIE Transactions, vol. 47, no. 11, pp. 1185–1202, 2015. Honorable Mention in IIE Transactions Focused Issue on Operations Engineering & Analytics Best Paper Award Competition for 2017.
  37. Alexopoulos, C., Goldsman, D., Tang, P., and Wilson, J. R. SPSTS: A sequential procedure for estimating the steady-state mean using standardized time series, IIE Transactions, vol. 48, pp. 864–880, 2016. Featured in the Research section of the August 2016 issue of the ISE Magazine by the Institute of Industrial and Systems Engineers.
  38. Alexopoulos, C., Goldsman, D., Mokashi, A. C., and Wilson, J. R. Automated simulation-based estimation of extreme steady-state quantiles via the maximum transformation, ACM Transactions on Modeling and Computer Simulation, vol. 27, no. 4, Article 22, 2017.
  39. Alexopoulos, C. Replicated computations results (RCR) report for “MNO-PQRS: Max Nonnegativity Ordering—Piecewise-Quadratic Rate Smoothing”, ACM Transactions on Modeling and Computer Simulation, vol. 27, no. 3, Article 18RCRR, 2018.
  40. Alexopoulos, C., Goldsman, D., Mokashi, A. C., Tien K.-W., and Wilson, J. R. Sequest: A sequential procedure for estimating quantiles in steady-state simulations, Operations Research, vol. 67, no. 4, 1162–1183, 2019.

Publications in Referred Conferences Proceedings

  1. Alexopoulos, C. and Fishman, G. S. Stochastic flow networks: How component criticality changes with component reliability, in Proceedings of the l988 Winter Simulation Conference, 500-503, IEEE, Piscataway, New Jersey, l988.
  2. Alexopoulos, C. and Fishman, G. S. Sensitivity analysis with regard to capacity expansion in network flow simulation, in Proceedings of the l990 Winter Simulation Conference, 3l7-322, IEEE, Piscataway, New Jersey, l990.
  3. Alexopoulos, C. Advanced simulation output analysis for a single system, in Proceedings of the 1993 Winter Simulation Conference, 89-96, IEEE, Piscataway, New Jersey, 1993.
  4. Alexopoulos, C. A Review of advanced methods for simulation output analysis, in Proceedings of the 1994 Winter Simulation Conference, 133-140, IEEE, Piscataway, New Jersey, 1994.
  5. Alexopoulos, C. Advanced methods for simulation output analysis, in Proceedings of the 1995 Winter Simulation Conference, 101-109, IEEE, Piscataway, New Jersey, 1995.
  6. Alexopoulos, C. and Seila, A. F. Implementing the batch means method in simulation experiments, in Proceedings of the 1996 Winter Simulation Conference, 214-221, IEEE, Piscataway, New Jersey, 1996.
  7. Alexopoulos, C., Fishman, G. S., and Seila, A. F. Computational experience with the batch means method, in Proceedings of the 1997 Winter Simulation Conference, 194-201, IEEE, Piscataway, New Jersey, 1997.
  8. Alexopoulos, C. and Seila, A. F. Advanced methods for simulation output analysis, in Proceedings of the 1998 Winter Simulation Conference, 113-120, IEEE, Piscataway, New Jersey, 1998.
  9. Alexopoulos, C. and Shultes, B. C. The balanced likelihood ratio method for estimating performance measures of highly reliable systems, in Proceedings of the 1998 Winter Simulation Conference, 1479-1486, IEEE, Piscataway, New Jersey, 1998.
  10. Alexopoulos, C. and Seila, A. F. Output analysis for simulations, in Proceedings of the 2000 Winter Simulation Conference, 101-108, IEEE, Piscataway, New Jersey, 2000.
  11. Alexopoulos, C., Goldsman, D., Fontanesi, J., Sawyer, M., De Guire, M., Kopald, D., and Holcomb, K. A discrete-event simulation application for clinics serving the poor, in Proceedings of the 2001 Winter Simulation Conference, 1386-1391, IEEE, Piscataway, New Jersey, 2001.
  12. Alexopoulos, C. and Seila, A. F. Output data analysis for simulations, in Proceedings of the 2001 Winter Simulation Conference, 115-122, IEEE, Piscataway, New Jersey, 2001.
  13. Alexopoulos, C. and Kim, S.-H. Output data analysis for simulations, in Proceedings of the 2002 Winter Simulation Conference, 85-96, IEEE, Piscataway, New Jersey, 2002.
  14. Steiger, N. M., Lada, E. K., Wilson, J. R., Alexopoulos, C., Goldsman, D., and Zouaoui, F. ASAP2: An improved batch means procedure for simulation output analysis, in Proceedings of the 2002 Winter Simulation Conference, 336-344, IEEE, Piscataway, New Jersey, 2002.
  15. Alexopoulos, C. and Goldsman, D. To batch or not to batch?, in Proceedings of the 2003 Winter Simulation Conference, 481-489, IEEE, Piscataway, New Jersey, 2003.
  16. Alexopoulos, C., Argon, N. T., Goldsman, D., and Tokol, G. Overlapping variance estimators for simulation, in Proceedings of the 2004 Winter Simulation Conference, 737-745, IEEE, Piscataway, New Jersey, 2004.
  17. Steiger, N. M., Lada, E. K., Wilson, J. R., Joines, J. A., Alexopoulos, C., and Goldsman, D. Steady-state simulation analysis using ASAP3, in Proceedings of the 2004 Winter Simulation Conference, 672-680, IEEE, Piscataway, New Jersey, 2004.
  18. Alexopoulos, C. and Kim, S.-H. Review of advanced methods for simulation output analysis, in Proceedings of the 2005 Winter Simulation Conference, 188-201, IEEE, Piscataway, New Jersey, 2005.
  19. Alexopoulos, C. A Comprehensive review of methods for simulation output analysis, in Proceedings of the 2006 Winter Simulation Conference, 168-178, IEEE, Piscataway, New Jersey, 2006.
  20. Alexopoulos, C. Statistical analysis of simulation output: State of the art, in Proceedings of the 2007 Winter Simulation Conference, 150-161, IEEE, Piscataway, New Jersey, 2007.
  21. Alexopoulos, C., Andradóttir, S., Argon, N. T., and Goldsman, D. Replicated batch means for steady-state simulations with initial transients, in Proceedings of the 2007 Winter Simulation Conference, 308-312, IEEE, Piscataway, New Jersey, 2007.
  22. Antonini, C., Alexopoulos, C., Goldsman, D., and Wilson, J. R. Folded standardized time series area variance estimators for simulation, in Proceedings of the 2007 Winter Simulation Conference, 455-462, IEEE, Piscataway, New Jersey, 2007.
  23. Mueller, R., Alexopoulos, C., and McGinnis, L. F. Automatic generation of simulation models for semiconductor manufacturing, in Proceedings of the 2007 Winter Simulation Conference, 648-657, IEEE, Piscataway, New Jersey, 2007.
  24. Lee, J. J., Alexopoulos, C., Goldsman, D., Kim, S.-H., and Tsui, K.-L. A distribution-free tabular Cusum chart for correlated data with automated variance estimation, in Proceedings of the 2008 Winter Simulation Conference, 417-425, IEEE, Piscataway, New Jersey, 2008.
  25. Meterelliyoz, M., Alexopoulos, C., and Goldsman, D. Reflected variance estimators for simulation, in Proceedings of the 2010 Winter Simulation Conference, pp. 1275-1282, IEEE, Piscataway, New Jersey, 2010.
  26. Alexopoulos, C., Goldsman, D, and Wilson, J. R. Overlapping batch means: Something more for nothing?, in Proceedings of the 2011 Winter Simulation Conference, pp. 401-411, IEEE, Piscataway, New Jersey, 2011.
  27. Aktaran-Kalaycı, T., Alexopoulos, C., Goldsman, D., and Wilson, J. R. On the mean-squared error of variance estimators for computer simulations, in Proceedings of the 2011 Winter Simulation Conference, pp. 549-555, IEEE, Piscataway, New Jersey, 2011.
  28. Huang, Y.-L., Suh, W., Alexopoulos, C., Fujimoto, R. M., and Hunter, M. P. Statistical Issues in ad hoc distributed simulations, in Proceedings of the 2011 Winter Simulation Conference, pp. 612–624, IEEE, Piscataway, New Jersey, 2011.
  29. Alexopoulos, C., Goldsman, D., and Wilson, J. R. A new perspective on batched quantile estimation, in Proceedings of the 2012 Winter Simulation Conference, pp. 190–200, IEEE, Piscataway, New Jersey, 2012.
  30. Alexopoulos, C., Goldsman, D., Wilson, J. R., and Tang, P. A sequential procedure for estimating the steady-state mean using standardized time-series, in Proceedings of the 2013 Winter Simulation Conference, pp. 613–622, IEEE, Piscataway, New Jersey, 2013.
  31. Huang, Y.-L., Alexopoulos, C., Hunter, M. P., and Fujimoto, R. M. On the transient response of open queueing networks using ad hoc distributed simulations, in Proceedings of the 2013 Winter Simulation Conference, pp. 2947–2958, IEEE, Piscataway, New Jersey, 2013.
  32. Alexopoulos, C., Goldsman, D., Mokashi, A. C., Nie, R., Sun, Q., Tien, K.-W., and Wilson, J. R. A sequential procedure for estimating steady-state quantiles, in Proceedings of the 2014 Winter Simulation Conference, pp. 662–673, IEEE, Piscataway, New Jersey, 2014.
  33. Dinçer Dingeç, K., Alexopoulos, C., Goldsman, D., Wilson, J. R., Chiu, W., and Aktaran-Kalaycı, T. Jackknifed variance estimators for simulation output analysis, in Proceedings of the 2015 Winter Simulation Conference, 459–471, IEEE, Piscataway, New Jersey, 2015.
  34. Alexopoulos, C., Goldsman, C., Mokashi, A. C., Tien, K.-W., and Wilson, J. R. SEQUEM: Estimating extreme steady-state quantiles via the maximum transformation, in Proceedings of the 2015 Winter Simulation Conference, 562–574, IEEE, Piscataway, New Jersey, 2015.
  35. Alexopoulos, C., Joines, J. A., and Kuhl, M. K. History of the Winter Simulation Conference: Modern Period (2008–2017), in Proceedings of the 2017 Winter Simulation Conference, pp. 100–114, IEEE, Piscataway, New Jersey, 2017.
  36. Alexopoulos, C., and Kelton, W. D. A concise history of simulation output analysis, in Proceedings of the 2017 Winter Simulation Conference, pp. 115–130, IEEE, Piscataway, New Jersey, 2017.
  37. Smith, J. S., Alexopoulos, C., Henderson, S. G., and Schruben, L. Teaching undergraduate simulation – 4 questions for 4 experienced instructors, in Proceedings of the 2017 Winter Simulation Conference, pp. 4264–4275, IEEE, Piscataway, New Jersey, 2017.
  38. Alexopoulos, C., Goldsman, D., Mokashi, A. C. and Wilson, J. R. Sequential estimation of steady-state quantiles: Lessons learned and future directions, in Proceedings of the 2018 Winter Simulation Conference, pp. 1814–1825, IEEE, Piscataway, New Jersey, 2018.
  39. Dinçer Dingeç, K., Alexopoulos, C., Goldsman, D., Meterelliyoz, M., and Wilson, J. R. Multiply reflected variance estimators for simulation, in Proceedings of the 2018 Winter Simulation Conference, pp. 1670–1681, IEEE, Piscataway, New Jersey, 2018.
  40. Alexopoulos, C., Goldsman, D., Mokashi, A. C., and Wilson, J. R. Sequential estimation of steady-state quantiles: Some new developments in methods and software, in Proceedings of the 2019 Winter Simulation Conference, pp. 3774−3785, IEEE, Piscataway, New Jersey, 2019.
  41. Alexopoulos, C., Boone J. H., Goldsman, D., Lolos, A., Dinçer Dingeç, K., and Wilson, J. R. Steady-state quantile estimation using standardized time series, in Proceedings of the 2020 Winter Simulation Conference, pp. 289−300, IEEE, Piscataway, New Jersey, 2020.
  42. Lei, L., Alexopoulos, C., Peng, Y, and Wilson, J. R. Confidence intervals and regions for quantiles using conditional Monte Carlo and generalized likelihood rations, in Proceedings of the 2020 Winter Simulation Conference, pp. 2071−2082, IEEE, Piscataway, New Jersey, 2019.

Submitted & Working Papers

  1. Alexopoulos, C., Goldsman, D., Lolos, A., Dingeç K. D., and Wilson, J. R. Steady-state quantile estimation using standardized time series.
  2. Dingeç, K. D., Alexopoulos C., Goldsman D., Lolos A., and Wilson J. R. Geometric-moment contraction, stationary processes, and their indicator processes, I: Theory,” Technical Report, Gebze Technical University.
  3. Dingeç, K. D., Alexopoulos C., Goldsman D., Lolos A., and Wilson J. R. Geometric-moment contraction, stationary processes, and their indicator processes, II: Examples, Technical Report, Gebze Technical University, Turkey.
  4. Lei, L., Alexopoulos, C., Peng, Y., and Wilson, J. R. Estimating confidence intervals and regions for quantiles by Monte Carlo simulation. Technical Report, Chongqing University, China.
  5. Lolos, A., Boone J. H., Alexopoulos, C., Goldsman, D., Dingeç K. D., Wilson, J. R., and Mokashi, A. STSTS: A sequential method for estimating steady-state quantiles using standardized time series, Technical Report, Georgia Institute of Technology, URL https://www2.isye.gatech.edu/christos/papers/sqsts_paper_JoS.pdf.