Search Results for author: Ayan Mukhopadhyay

Found 25 papers, 4 papers with code

Forecasting and Mitigating Disruptions in Public Bus Transit Services

no code implementations6 Mar 2024 Chaeeun Han, Jose Paolo Talusan, Dan Freudberg, Ayan Mukhopadhyay, Abhishek Dubey, Aron Laszka

Public transportation systems often suffer from unexpected fluctuations in demand and disruptions, such as mechanical failures and medical emergencies.

Decision Making in Non-Stationary Environments with Policy-Augmented Search

1 code implementation6 Jan 2024 Ava Pettet, Yunuo Zhang, Baiting Luo, Kyle Wray, Hendrik Baier, Aron Laszka, Abhishek Dubey, Ayan Mukhopadhyay

In this paper, we introduce \textit{Policy-Augmented Monte Carlo tree search} (PA-MCTS), which combines action-value estimates from an out-of-date policy with an online search using an up-to-date model of the environment.

Decision Making Decision Making Under Uncertainty +2

Act as You Learn: Adaptive Decision-Making in Non-Stationary Markov Decision Processes

1 code implementation3 Jan 2024 Baiting Luo, Yunuo Zhang, Abhishek Dubey, Ayan Mukhopadhyay

However, existing approaches for decision-making in NSMDPs have two major shortcomings: first, they assume that the updated environmental dynamics at the current time are known (although future dynamics can change); and second, planning is largely pessimistic, i. e., the agent acts ``safely'' to account for the non-stationary evolution of the environment.

Decision Making

Deploying ADVISER: Impact and Lessons from Using Artificial Intelligence for Child Vaccination Uptake in Nigeria

no code implementations30 Dec 2023 Opadele Kehinde, Ruth Abdul, Bose Afolabi, Parminder Vir, Corinne Namblard, Ayan Mukhopadhyay, Abiodun Adereni

In particular, low vaccination uptake in Nigeria is a major driver of more than 2, 000 daily deaths of children under the age of five years.

Task Grouping for Automated Multi-Task Machine Learning via Task Affinity Prediction

no code implementations24 Oct 2023 Afiya Ayman, Ayan Mukhopadhyay, Aron Laszka

We identify inherent task features and STL characteristics that can help us to predict whether a group of tasks should be learned together using MTL or if they should be learned independently using STL.

Multi-Task Learning

Artificial Intelligence for Emergency Response

no code implementations15 Jun 2023 Ayan Mukhopadhyay

Emergency response management (ERM) is a challenge faced by communities across the globe.

Management

Fairguard: Harness Logic-based Fairness Rules in Smart Cities

no code implementations22 Feb 2023 Yiqi Zhao, Ziyan An, Xuqing Gao, Ayan Mukhopadhyay, Meiyi Ma

Smart cities operate on computational predictive frameworks that collect, aggregate, and utilize data from large-scale sensor networks.

Fairness

Dynamic Simplex: Balancing Safety and Performance in Autonomous Cyber Physical Systems

no code implementations20 Feb 2023 Baiting Luo, Shreyas Ramakrishna, Ava Pettet, Christopher Kuhn, Gabor Karsai, Ayan Mukhopadhyay

To address these limitations, we propose a dynamic simplex strategy with an online controller switching logic that allows two-way switching.

Decision Making

Generative Anomaly Detection for Time Series Datasets

no code implementations28 Jun 2022 Zhuangwei Kang, Ayan Mukhopadhyay, Aniruddha Gokhale, Shijie Wen, Abhishek Dubey

To this end, we propose a principled and comprehensive framework consisting of a data-driven generative approach that can perform tractable density estimation for detecting traffic anomalies.

Anomaly Detection Density Estimation +2

ADVISER: AI-Driven Vaccination Intervention Optimiser for Increasing Vaccine Uptake in Nigeria

no code implementations28 Apr 2022 Vineet Nair, Kritika Prakash, Michael Wilbur, Aparna Taneja, Corinne Namblard, Oyindamola Adeyemo, Abhishek Dubey, Abiodun Adereni, Milind Tambe, Ayan Mukhopadhyay

More than 5 million children under five years die from largely preventable or treatable medical conditions every year, with an overwhelmingly large proportion of deaths occurring in under-developed countries with low vaccination uptake.

Offline Vehicle Routing Problem with Online Bookings: A Novel Problem Formulation with Applications to Paratransit

1 code implementation25 Apr 2022 Amutheezan Sivagnanam, Salah Uddin Kadir, Ayan Mukhopadhyay, Philip Pugliese, Abhishek Dubey, Samitha Samaranayake, Aron Laszka

Vehicle routing problems (VRPs) can be divided into two major categories: offline VRPs, which consider a given set of trip requests to be served, and online VRPs, which consider requests as they arrive in real-time.

An Online Approach to Solve the Dynamic Vehicle Routing Problem with Stochastic Trip Requests for Paratransit Services

no code implementations28 Mar 2022 Michael Wilbur, Salah Uddin Kadir, Youngseo Kim, Geoffrey Pettet, Ayan Mukhopadhyay, Philip Pugliese, Samitha Samaranayake, Aron Laszka, Abhishek Dubey

Accounting for stochastic requests while optimizing a non-myopic utility function is computationally challenging; indeed, the action space for such a problem is intractably large in practice.

Decision Making

Decision Making in Non-Stationary Environments with Policy-Augmented Monte Carlo Tree Search

no code implementations25 Feb 2022 Geoffrey Pettet, Ayan Mukhopadhyay, Abhishek Dubey

We find that PC-MCTS can achieve higher cumulative rewards than the policy in isolation under several environmental shifts while converging in significantly fewer iterations than pure MCTS.

Decision Making Decision Making Under Uncertainty +1

Designing Decision Support Systems for Emergency Response: Challenges and Opportunities

no code implementations23 Feb 2022 Geoffrey Pettet, Hunter Baxter, Sayyed Mohsen Vazirizade, Hemant Purohit, Meiyi Ma, Ayan Mukhopadhyay, Abhishek Dubey

Designing effective emergency response management (ERM) systems to respond to incidents such as road accidents is a major problem faced by communities.

Management

Practitioner-Centric Approach for Early Incident Detection Using Crowdsourced Data for Emergency Services

no code implementations3 Dec 2021 Yasas Senarath, Ayan Mukhopadhyay, Sayyed Mohsen Vazirizade, Hemant Purohit, Saideep Nannapaneni, Abhishek Dubey

First, we show how crowdsourced reports, ground-truth historical data, and other relevant determinants such as traffic and weather can be used together in a Convolutional Neural Network (CNN) architecture for early detection of emergency incidents.

Event Detection Management +1

Learning Incident Prediction Models Over Large Geographical Areas for Emergency Response Systems

2 code implementations15 Jun 2021 Sayyed Mohsen Vazirizade, Ayan Mukhopadhyay, Geoffrey Pettet, Said El Said, Hiba Baroud, Abhishek Dubey

These statistical models are then used for proactive stationing which allocates first responders across the spatial area in order to reduce overall response time.

Decision Making Management

Hydrodynamic attractor and novel fixed points in superfluid Bjorken flow

no code implementations31 Dec 2020 Toshali Mitra, Ayan Mukhopadhyay, Alexander Soloviev

Extending the quantum effective approach of Son and Nicolis and incorporating dissipation, we develop a MIS formalism for describing a superfluid out of equilibrium by including the Goldstone boson and the condensate together with the hydrodynamic modes as the effective degrees of freedom.

High Energy Physics - Phenomenology Quantum Gases High Energy Physics - Theory

Linear-in-$T$ resistivity from semiholographic non-Fermi liquid models

no code implementations31 Dec 2020 Benoît Douçot, Ayan Mukhopadhyay, Giuseppe Policastro, Sutapa Samanta

We construct a semiholographic effective theory in which the electron of a two-dimensional band hybridizes with a fermionic operator of a critical holographic sector, while also interacting with other bands that preserve quasiparticle characteristics.

High Energy Physics - Theory Strongly Correlated Electrons

Hierarchical Planning for Resource Allocation in Emergency Response Systems

no code implementations24 Dec 2020 Geoffrey Pettet, Ayan Mukhopadhyay, Mykel Kochenderfer, Abhishek Dubey

We use the emergency response as a case study and show how a large resource allocation problem can be split into smaller problems.

Designing Emergency Response Pipelines : Lessons and Challenges

no code implementations15 Oct 2020 Ayan Mukhopadhyay, Geoffrey Pettet, Mykel Kochenderfer, Abhishek Dubey

Emergency response to incidents such as accidents, crimes, and fires is a major problem faced by communities.

Management

Uncertainty Aware Wildfire Management

no code implementations15 Oct 2020 Tina Diao, Samriddhi Singla, Ayan Mukhopadhyay, Ahmed Eldawy, Ross Shachter, Mykel Kochenderfer

A major problem in using data-driven models to combat wildfires is the lack of comprehensive data sources that relate fires with relevant covariates.

Management

A Review of Incident Prediction, Resource Allocation, and Dispatch Models for Emergency Management

no code implementations7 Jun 2020 Ayan Mukhopadhyay, Geoffrey Pettet, Sayyed Vazirizade, Di Lu, Said El Said, Alex Jaimes, Hiba Baroud, Yevgeniy Vorobeychik, Mykel Kochenderfer, Abhishek Dubey

In the last fifty years, researchers have developed statistical, data-driven, analytical, and algorithmic approaches for designing and improving emergency response management (ERM) systems.

Decision Making Decision Making Under Uncertainty +1

On Algorithmic Decision Procedures in Emergency Response Systems in Smart and Connected Communities

no code implementations21 Jan 2020 Geoffrey Pettet, Ayan Mukhopadhyay, Mykel Kochenderfer, Yevgeniy Vorobeychik, Abhishek Dubey

This is not a trivial planning problem --- a major challenge with dynamically balancing the spatial distribution of responders is the complexity of the problem.

Decision Making Decision Making Under Uncertainty +1

An Online Decision-Theoretic Pipeline for Responder Dispatch

no code implementations21 Feb 2019 Ayan Mukhopadhyay, Geoffrey Pettet, Chinmaya Samal, Abhishek Dubey, Yevgeniy Vorobeychik

We highlight why such an approach is crucial to the effectiveness of emergency response, and present an algorithmic framework that can compute promising actions for a given decision-theoretic model for responder dispatch.

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