Rachita Chandra

dblp:227/2555 · DBLP profile ↗
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2ranked-venue papers
1as first author
1since 2021 · last 2021
—ORCID · none

Domains — the database's venue-derived domains; a paper can count in several

Artificial intelligence and machine learning · 1Graphics, computer vision, multimedia, augmented reality and games · 1Applied, interdisciplinary, general and emerging computing · 1 · 1 first-author · 1 since 2021

Expertise — from the expertise taxonomy: the topics of the expert's papers under the CCF categories. A weight counts papers with recency: 1 for a paper about the topic, 0.3 when the topic is its context, halved every five years.

Artificial intelligence
1 paper
Reinforcement learning · 60% Multi-agent systems · 20% Trustworthy machine learning · 20%

Topics — the 5 heaviest of 5, each with the papers that count most for it

TopicWeightPapersLastEvidence papers
Machine learning › Reinforcement learning › safe reinforcement learning
constrained policy learning
0.412019
Teaching AI Agents Ethical Values Using Reinforcement Learning and Policy Orchestration · IJCAI 2019
Machine learning › Trustworthy machine learning
ethical AI
0.412019
Teaching AI Agents Ethical Values Using Reinforcement Learning and Policy Orchestration · IJCAI 2019
Knowledge, reasoning and agents › Multi-agent systems
human-agent interaction
0.412019
Teaching AI Agents Ethical Values Using Reinforcement Learning and Policy Orchestration · IJCAI 2019
Machine learning › Reinforcement learning › imitation learning
inverse reinforcement learning
0.412019
Teaching AI Agents Ethical Values Using Reinforcement Learning and Policy Orchestration · IJCAI 2019
Machine learning › Reinforcement learning
safe reinforcement learning
0.412019
Teaching AI Agents Ethical Values Using Reinforcement Learning and Policy Orchestration · IJCAI 2019

Methods — techniques the papers use, named apart from their topics

policy orchestration · 0.4inverse reinforcement learning · 0.4contextual bandit · 0.4
YearPublicationVenuePosition
2021 emrKBQA: Creating a Clinical Knowledge-Base Question Answering Dataset
Rachita Chandra, Preethi Raghavan, Jennifer J. Liang, Diwakar Mahajan, Peter Szolovits
AMIA1
2019 Teaching AI Agents Ethical Values Using Reinforcement Learning and Policy Orchestration
abstract
Autonomous cyber-physical agents play an increasingly large role in our lives. To ensure that they behave in ways aligned with the values of society, we must develop techniques that allow these agents to not only maximize their reward in an environment, but also to learn and follow the implicit constraints of society. We detail a novel approach that uses inverse reinforcement learning to learn a set of unspecified constraints from demonstrations and reinforcement learning to learn to maximize environmental rewards. A contextual bandit-based orchestrator then picks between the two policies: constraint-based and environment reward-based. The contextual bandit orchestrator allows the agent to mix policies in novel ways, taking the best actions from either a reward-maximizing or constrained policy. In addition, the orchestrator is transparent on which policy is being employed at each time step. We test our algorithms using Pac-Man and show that the agent is able to learn to act optimally, act within the demonstrated constraints, and mix these two functions in complex ways.
Ritesh Noothigattu, Djallel Bouneffouf 0001, Nicholas Mattei, Rachita Chandra, Piyush Madan, Kush R. Varshney, Murray Campbell, Moninder Singh, Francesca Rossi 0001
IJCAI4