Search Results for author: Thomas Hartvigsen

Found 20 papers, 10 papers with code

TAXI: Evaluating Categorical Knowledge Editing for Language Models

no code implementations23 Apr 2024 Derek Powell, Walter Gerych, Thomas Hartvigsen

We then use TAXI to evaluate popular editors' consistency, measuring how often editing a subject's category appropriately edits its properties.

knowledge editing Multiple-choice

UniTS: Building a Unified Time Series Model

1 code implementation29 Feb 2024 ShangHua Gao, Teddy Koker, Owen Queen, Thomas Hartvigsen, Theodoros Tsiligkaridis, Marinka Zitnik

However, current foundation models apply to sequence data but not to time series, which present unique challenges due to the inherent diverse and multidomain time series datasets, diverging task specifications across forecasting, classification and other types of tasks, and the apparent need for task-specialized models.

Anomaly Detection Imputation +1

MATHWELL: Generating Age-Appropriate Educational Math Word Problems

1 code implementation24 Feb 2024 Bryan R Christ, Jonathan Kropko, Thomas Hartvigsen

MATHWELL's performance despite being trained by finetuning only highlights the quality of our synthetic data for training age-appropriate word problem generators.

Math

Improving Black-box Robustness with In-Context Rewriting

1 code implementation13 Feb 2024 Kyle O'Brien, Nathan Ng, Isha Puri, Jorge Mendez, Hamid Palangi, Yoon Kim, Marzyeh Ghassemi, Thomas Hartvigsen

Most techniques for improving OOD robustness are not applicable to settings where the model is effectively a black box, such as when the weights are frozen, retraining is costly, or the model is leveraged via an API.

News Classification

Learning from Time Series under Temporal Label Noise

no code implementations6 Feb 2024 Sujay Nagaraj, Walter Gerych, Sana Tonekaboni, Anna Goldenberg, Berk Ustun, Thomas Hartvigsen

We first demonstrate the importance of modelling the temporal nature of the label noise function and how existing methods will consistently underperform.

Time Series

Machine Learning for Health symposium 2023 -- Findings track

no code implementations1 Dec 2023 Stefan Hegselmann, Antonio Parziale, Divya Shanmugam, Shengpu Tang, Mercy Nyamewaa Asiedu, Serina Chang, Thomas Hartvigsen, Harvineet Singh

A collection of the accepted Findings papers that were presented at the 3rd Machine Learning for Health symposium (ML4H 2023), which was held on December 10, 2023, in New Orleans, Louisiana, USA.

Multi-State Brain Network Discovery

no code implementations4 Nov 2023 Hang Yin, Yao Su, Xinyue Liu, Thomas Hartvigsen, Yanhua Li, Xiangnan Kong

We refer to such brain networks as multi-state, and this mixture can help us understand human behavior.

Continuous Time Evidential Distributions for Irregular Time Series

1 code implementation25 Jul 2023 Taylor W. Killian, Haoran Zhang, Thomas Hartvigsen, Ava P. Amini

Prevalent in many real-world settings such as healthcare, irregular time series are challenging to formulate predictions from.

Irregular Time Series Time Series +1

Interpretable Unified Language Checking

1 code implementation7 Apr 2023 Tianhua Zhang, Hongyin Luo, Yung-Sung Chuang, Wei Fang, Luc Gaitskell, Thomas Hartvigsen, Xixin Wu, Danny Fox, Helen Meng, James Glass

Despite recent concerns about undesirable behaviors generated by large language models (LLMs), including non-factual, biased, and hateful language, we find LLMs are inherent multi-task language checkers based on their latent representations of natural and social knowledge.

Fact Checking Fairness +2

Finding Short Signals in Long Irregular Time Series with Continuous-Time Attention Policy Networks

no code implementations8 Feb 2023 Thomas Hartvigsen, Jidapa Thadajarassiri, Xiangnan Kong, Elke Rundensteiner

Using this insight, we then propose CAT, a model that classifies multivariate ITS by explicitly seeking highly-relevant portions of an input series' timeline.

Imputation Irregular Time Series +2

Aging with GRACE: Lifelong Model Editing with Discrete Key-Value Adaptors

1 code implementation NeurIPS 2023 Thomas Hartvigsen, Swami Sankaranarayanan, Hamid Palangi, Yoon Kim, Marzyeh Ghassemi

We propose GRACE, a lifelong model editing method, which implements spot-fixes on streaming errors of a deployed model, ensuring minimal impact on unrelated inputs.

Model Editing World Knowledge

Class-Specific Explainability for Deep Time Series Classifiers

1 code implementation11 Oct 2022 Ramesh Doddaiah, Prathyush Parvatharaju, Elke Rundensteiner, Thomas Hartvigsen

Instead, when a classifier is choosing between many classes, an effective explanation must show what sets the chosen class apart from the rest.

Time Series Time Series Analysis +1

Stop&Hop: Early Classification of Irregular Time Series

1 code implementation21 Aug 2022 Thomas Hartvigsen, Walter Gerych, Jidapa Thadajarassiri, Xiangnan Kong, Elke Rundensteiner

We bridge this gap and study early classification of irregular time series, a new setting for early classifiers that opens doors to more real-world problems.

Early Classification General Classification +3

TWEET-FID: An Annotated Dataset for Multiple Foodborne Illness Detection Tasks

no code implementations LREC 2022 Ruofan Hu, Dongyu Zhang, Dandan Tao, Thomas Hartvigsen, Hao Feng, Elke Rundensteiner

To accelerate the development of machine learning-based models for foodborne outbreak detection, we thus present TWEET-FID (TWEET-Foodborne Illness Detection), the first publicly available annotated dataset for multiple foodborne illness incident detection tasks.

slot-filling Slot Filling

The Road to Explainability is Paved with Bias: Measuring the Fairness of Explanations

no code implementations6 May 2022 Aparna Balagopalan, Haoran Zhang, Kimia Hamidieh, Thomas Hartvigsen, Frank Rudzicz, Marzyeh Ghassemi

Across two different blackbox model architectures and four popular explainability methods, we find that the approximation quality of explanation models, also known as the fidelity, differs significantly between subgroups.

BIG-bench Machine Learning Fairness

ToxiGen: A Large-Scale Machine-Generated Dataset for Adversarial and Implicit Hate Speech Detection

1 code implementation ACL 2022 Thomas Hartvigsen, Saadia Gabriel, Hamid Palangi, Maarten Sap, Dipankar Ray, Ece Kamar

To help mitigate these issues, we create ToxiGen, a new large-scale and machine-generated dataset of 274k toxic and benign statements about 13 minority groups.

Hate Speech Detection Language Modelling

Human Attention Maps for Text Classification: Do Humans and Neural Networks Focus on the Same Words?

no code implementations ACL 2020 Cansu Sen, Thomas Hartvigsen, Biao Yin, Xiangnan Kong, Elke Rundensteiner

Motivated by human attention, computational attention mechanisms have been designed to help neural networks adjust their focus on specific parts of the input data.

General Classification text-classification +1

Reducing Computation in Recurrent Networks by Selectively Updating State Neurons

no code implementations25 Sep 2019 Thomas Hartvigsen, Cansu Sen, Xiangnan Kong, Elke Rundensteiner

As a result, even for high-dimensional hidden states, all dimensions are updated at each timestep regardless of the recurrent memory cell.

Adaptive-Halting Policy Network for Early Classification

1 code implementation KDD 2019 Thomas Hartvigsen, Cansu Sen, Xiangnan Kong, Elke Rundensteiner

Early classification of time series is the prediction of the class label of a time series before it is observed in its entirety.

Classification Early Classification +3

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