Gabriel Zayas-Cabán

Gabriel is an Assistant Professor in the Industrial and Systems Engineering Department at the University of Wisconsin-Madison. He also holds an affiliate appointment with the BerbeeWalsh Department of Emergency Medicine in the School of Medicine and Public Health. His works on healthcare delivery, stochastic modeling and optimization, and causal inference. His recent focus is on emergency department admission decisions. Before coming to Wisconsin, Gabriel was a President's Postdoctoral Fellow at the University of Michigan and completed his Ph.D. at Cornell University's Center for Applied Mathematics, advised by Professor Mark E. Lewis. He received his B.A. in Mathematics from the University of South Florida.

Curriculum Vitae

Submitted Papers

  • Zayas-Cabán G. and A.L. Cochran. ``A Randomized Routing Control for a Non-Stationary Finite Horizon Multi-Class and Multi-Server Queueing System."
  • David-Gomez, J. C., A.L. Cochran, and G. Zayas-Cabán. ``Unveiling Bias in Sequential Decision Making: A Causal Inference Approach for Stochastic Service Systems." (Preprint)
  • Alvarez-Avendano, S.A., V.Y. Odeh-Couvertier, B.W. Patterson, M.N. Shah, and G. Zayas-Cabán. ``Outcomes from Admission rather than Discharge for Older Adults in the Emergency Department with Vague Presentations."
  • Alvarez-Avendano, S. A., A.L. Cochran, K.E. Kocher, B.W. Patterson, and G. Zayas-Cabán. ``Average Response Curves for Treatment Time in the Emergency Department." (Preprint)

Recent Publications

  • David-Gomez, J. C., A.L. Cochran, B.W. Patterson, and G. Zayas-Cabán (2024). ``Evaluation of a Split Flow Model for the Emergency Department." Manufacturing & Service Operations Management, 26(3), 911-930. (Paper) (Supplementary Material) (Appendix)
  • Pfaff, A., A.L. Cochran, J, Vechinski, T. Molfenter, and G. Zayas-Cabán (2023). ``The Association Between Attitudes and the Provision of Medications for Opioid Use Disorder (MOUD) in United States Jails." Drug and Alcohol Dependence Reports, 10, 100211. (Paper)
  • Alvarez-Avendano, S. A., O. Alagoz, J. Oruongo, and G. Zayas-Cabán (2023). ``Optimizing Patient Transitions to Skilled Nursing Facilities." IISE Transactions. (Paper)
  • David-Gomez, J. C., A.L. Cochran, M. Smith, and G. Zayas-Cabán (2023). ``Prediction of Rehospitalization and Mortality Risks for Skilled Nursing Facilities Using a Dimension Reduction Approach." BMC Geriatrics, 23(1), 394. (Paper)
  • Zayas-Cabán G. and A.L. Cochran (2023). ``Scheduling Servers in a Two-Stage Queue with Abandonments and Costs." Probability in the Engineering and Informational Sciences, 37(3), 833-851. (Paper)
  • Odeh-Couvertier, V.Y., B.W. Patterson, and G. Zayas-Cabán (2022). ``Association Between Advanced Image Ordered in the Emergency Department on Subsequent Imaging for Abdominal Pain Patients." Academic Emergency Medicine, 29(9), 1078-1083. (Paper)
  • White, V.M., Alvarez-Avendano, S. A., L.A. Albert, A.E. Zgierska, J. Balles, and G. Zayas-Cabán (2021). ``Impact of a Community-Policing Initiative Promoting Substance Use Disorder Treatment Over Criminal Charges on Arrest Recidivism." Drug and Alcohol Dependence, 227(0376-8716), 108915-108921. (Paper)
  • Sagaroc Gruichich, T., J.C. David-Gomez, G. Zayas-Cabán, M.G. McInnis, and A.L. Cochran (2021). ``A Digital Self-Report Survey of Mood for Bipolar Disorder." Bipolar Disorders, 23(8), 810-820. (Paper)
  • Alvarez-Avendano, S.A., A.L. Cochran, B.W. Patterson, M.N. Shah, M. Smith, and G. Zayas-Cabán (2020). ``The Average Effect of ED Admission on Readmission and Mortality for Older Adults with Chest Pain." Medical Care, 58(10), 881-888. (Paper)
  • Zayas-Cabán, G., E.J. Lodree, and D.L. Kaufman (2020). ``Optimal Control of Parallel Queues for Managing Volunteer Convergence." Production and Operations Management, 29(10), 2268-2288. (Paper)
  • Cochran, A.L., P.J. Rathouz, K.E. Kocher, and G. Zayas-Cabán (2019). ``A Latent Variable Approach to Potential Outcomes for Emergency Department Admission Decisions." Statistics in Medicine, 38(20), 3911-3935. (Paper)
  • Zayas-Cabán, G., S. Jasin, and G. Wang (2019). ``An Asymptotially Optimal Heuristic for a Non-stationary Finite-Horizon Restless Multi-Armed Multi-Action Bandit." Advances in Applied Probability, 51(3), 745-772. (Paper) (Supplementary Material)

Contact

  • Room: 3011
    Mechanical Engineering
    1513 University Ave,
    Madison, WI 53706
  • +1(608)265-6761

Fernando Acosta-Perez

Fernando is a PhD student at the Department of Industrial and Systems Engineering at the University of Wisconsin-Madison (co-advised with Professor Justin Boutilier). He received his bachelor's degree in industrial engineering from the University of Puerto Rico at Mayagüez and is interested in Operations Research. His current work is on using optimization and machine learning to improve hospital patient flow operations.

Juan Camilo David Gomez

Camilo is a PhD student in the Department of Industrial & Systems Engineering Department at the University of Wisconsin-Madison. He received his bachelor's degree in mathematics from the University of Antioquia in Medellín, Colombia. Camilo has worked on understanding the impact of split flow models in emergency departments. He has also done some work on evaluating bias in sequential decision making using causal inference frameworks.

Jairo Alejandro Martínez Correa

Alejandro is a PhD student in the Department of Industrial & Systems Engineering Department at the University of Wisconsin-Madison. He received his bachelor's degree in mathematics from the National University of Colombia at Medellín, Colombia and his master's degree in Mathematics from the University of Antioquia in Medellín, Colombia.

Bryan Saúl

Bryan is a PhD student in the Industrial and Systems Engineering Department at the University of Wisconsin-Madison. He received his bachelor's degree in industrial engineering from the University of Puerto Rico at Mayagüez.

Veronica White

Veronica is a PhD student in the Industrial and Systems Engineering Department at the University of Wisconsin-Madison (co-advised with Professor Laura Albert). She received her bachelor's degree in industrial engineering from Iowa State University.

Sebastian Alejandro Alvarez Avendaño

Sebastian is a Senior Associate in Applied Artificial Intelligence and Machine Learning at JP Morgan. He received his Ph.D. in Industrial & Systems Engineering at the University of Wisconsin-Madison in 2023. His thesis title is `Counterfactual Congestion in Service Systems'.

Valerie Y. Odeh Couvertier

Valerie is a Manager of BIA GPS Cell Therapy Site Analytics with Bristol Myers Squibb. She received her Ph.D. in Industrial & Systems Engineering at the University of Wisconsin-Madison in 2024. Her thesis title is `Learning Service Systems'.