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Alex DiChristofano

dblp:301/9434 · DBLP profile ↗
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2ranked-venue papers
1as first author
2since 2021 · last 2025
0000-0001-5458-6105ORCID · corroborated

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

Artificial intelligence and machine learning · 2 · 1 first-author · 2 since 2021Graphics, computer vision, multimedia, augmented reality and games · 2 · 1 first-author · 2 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
2 papers
Reinforcement learning · 57% Speech recognition and synthesis · 22% Trustworthy machine learning · 22%
Interdisciplinary, comprehensive, and emerging computing
1 paper
Smart cities and intelligent transportation · 100%

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

TopicWeightPapersLastEvidence papers
Machine learning › Reinforcement learning › bandit › pure-exploration bandit
active search
0.912025
Active Geospatial Search for Efficient Tenant Eviction Outreach · AAAI 2025
Machine learning › Reinforcement learning
hierarchical reinforcement learning
0.912025
Active Geospatial Search for Efficient Tenant Eviction Outreach · AAAI 2025
Smart cities and intelligent transportation › urban computing
urban analytics
0.912025
Active Geospatial Search for Efficient Tenant Eviction Outreach · AAAI 2025
Natural language and speech › Speech recognition and synthesis
automatic speech recognition
0.712023
Performance Disparities between Accents in Automatic Speech Recognition (Student Abstract) · AAAI 2023
Machine learning › Trustworthy machine learning
fairness
0.712023
Performance Disparities between Accents in Automatic Speech Recognition (Student Abstract) · AAAI 2023

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

hierarchical reinforcement learning · 1.7active geospatial search · 1.7statistical audit · 0.7
YearPublicationVenuePosition
2025 Active Geospatial Search for Efficient Tenant Eviction Outreach
abstract
Tenant evictions threaten housing stability and are a major concern for many cities. An open question concerns whether data-driven methods enhance outreach programs that target at-risk tenants to mitigate their risk of eviction. We propose a novel active geospatial search (AGS) modeling framework for this problem. AGS integrates property-level information in a search policy that identifies a sequence of rental units to canvas to both determine their eviction risk and provide support if needed. We propose a hierarchical reinforcement learning approach to learn a search policy for AGS that scales to large urban areas containing thousands of parcels, balancing exploration and exploitation and accounting for travel costs and a budget constraint. Crucially, the search policy adapts online to newly discovered information about evictions. Evaluation using eviction data for a large urban area demonstrates that the proposed framework and algorithmic approach are considerably more effective at sequentially identifying eviction cases than baseline methods.
Anindya Sarkar, Alex DiChristofano, Sanmay Das, Patrick J. Fowler, Nathan Jacobs, Yevgeniy Vorobeychik
AAAI2
2023 Performance Disparities between Accents in Automatic Speech Recognition (Student Abstract)
abstract
In this work, we expand the discussion of bias in Automatic Speech Recognition (ASR) through a large-scale audit. Using a large and global data set of speech, we perform an audit of some of the most popular English ASR services. We show that, even when controlling for multiple linguistic covariates, ASR service performance has a statistically significant relationship to the political alignment of the speaker's birth country with respect to the United States' geopolitical power.
Alex DiChristofano, Henry Shuster, Shefali Chandra, Neal Patwari
AAAI1