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Your search keyword '"Tran, Ngoc M."' showing total 3 results
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3 results on '"Tran, Ngoc M."'

1. The tropical geometry of causal inference for extremes

Author

Tran, Ngoc M

Subjects
Mathematics - Statistics Theory, Mathematics - Combinatorics
Abstract

Extreme value statistics is the max analogue of classical statistics, while tropical geometry is the max analogue of classical geometry. In this paper, we review recent work where insights from tropical geometry were used to develop new, efficient learning algorithms with leading performance on benchmark datasets in extreme value statistics. We give intuition, backed by performances on benchmark datasets, for why and when causal inference for extremes should be employed over classical methods. Finally, we list some open problems at the intersection of causal inference, tropical geometry and deep learning., Comment: 19 pages, 5 figures

Published
2022

3. Predicting Covid‐19 emergency medical service incidents from daily hospitalisation trends.

Author

Xie, Yangxinyu, Kulpanowski, David, Ong, Joshua, Nikolova, Evdokia, and Tran, Ngoc M.

Abstract

Introduction: The aim of our retrospective study was to quantify the impact of Covid‐19 on the temporal distribution of emergency medical services (EMS) demand in Travis County, Austin, Texas and propose a robust model to forecast Covid‐19 EMS incidents. Methods: We analysed the temporal distribution of EMS calls in the Austin‐Travis County area between 1 January 2019 and 31 December 2020. Change point detection was performed to identify the critical dates marking changes in EMS call distributions, and time series regression was applied for forecasting Covid‐19 EMS incidents. Results: Two critical dates marked the impact of Covid‐19 on the distribution of EMS calls: March 17th, when the daily number of non‐pandemic EMS incidents dropped significantly, and 13 May, by which the daily number of EMS calls climbed back to 75% of the number in pre‐Covid‐19 time. The new daily count of the hospitalisation of Covid‐19 patients alone proves a powerful predictor of the number of pandemic EMS calls, with an r2 value equal to 0.85. In particular, for every 2.5 cases, where EMS takes a Covid‐19 patient to a hospital, one person is admitted. Conclusion: The mean daily number of non‐pandemic EMS demand was significantly less than the period before the Covid‐19 pandemic. The number of EMS calls for Covid‐19 symptoms can be predicted from the daily new hospitalisation of Covid‐19 patients. These findings may be of interest to EMS departments as they plan for future pandemics, including the ability to predict pandemic‐related calls in an effort to adjust a targeted response. [ABSTRACT FROM AUTHOR]

Published
2021
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