Search Results for author: Alexander Capstick

Found 10 papers, 3 papers with code

Urinary Tract Infection Detection in Digital Remote Monitoring: Strategies for Managing Participant-Specific Prediction Complexity

1 code implementation18 Feb 2025 Kexin Fan, Alexander Capstick, Ramin Nilforooshan, Payam Barnaghi

The current research focuses on improving the performance of previous models, particularly by refining the Multilayer Perceptron (MLP), to better handle variations in home environments and improve sex fairness in predictions by making use of concepts from multitask learning.

Clustering Fairness

Two-Stage Representation Learning for Analyzing Movement Behavior Dynamics in People Living with Dementia

no code implementations13 Feb 2025 Jin Cui, Alexander Capstick, Payam Barnaghi, Gregory Scott

In remote healthcare monitoring, time series representation learning reveals critical patient behavior patterns from high-frequency data.

Language Modeling Language Modelling +3

Evaluating Spoken Language as a Biomarker for Automated Screening of Cognitive Impairment

no code implementations30 Jan 2025 Maria R. Lima, Alexander Capstick, Fatemeh Geranmayeh, Ramin Nilforooshan, Maja Matarić, Ravi Vaidyanathan, Payam Barnaghi

For ADRD classification, a Random Forest applied to lexical features achieved a mean sensitivity of 69. 4% (95% confidence interval (CI) = 66. 4-72. 5) and specificity of 83. 3% (78. 0-88. 7).

Feature Importance severity prediction +1

AutoElicit: Using Large Language Models for Expert Prior Elicitation in Predictive Modelling

1 code implementation26 Nov 2024 Alexander Capstick, Rahul G. Krishnan, Payam Barnaghi

We find that AutoElicit yields priors that can substantially reduce error over uninformative priors, using fewer labels, and consistently outperform in-context learning.

Bayesian Inference In-Context Learning +1

Enabling Regional Explainability by Automatic and Model-agnostic Rule Extraction

no code implementations25 Jun 2024 Yu Chen, Tianyu Cui, Alexander Capstick, Nan Fletcher-Loyd, Payam Barnaghi

This method enhances the regional explainability of machine learning models and offers wider applicability compared to existing methods.

Drug Discovery

Representation Learning of Daily Movement Data Using Text Encoders

1 code implementation7 May 2024 Alexander Capstick, Tianyu Cui, Yu Chen, Payam Barnaghi

Time-series representation learning is a key area of research for remote healthcare monitoring applications.

Clustering Language Modeling +3

Information Theory Inspired Pattern Analysis for Time-series Data

no code implementations22 Feb 2023 Yushan Huang, Yuchen Zhao, Alexander Capstick, Francesca Palermo, Hamed Haddadi, Payam Barnaghi

For applications with stochastic state transitions, features are developed based on Shannon's entropy of Markov chains, entropy rates of Markov chains, entropy production of Markov chains, and von Neumann entropy of Markov chains.

Time Series Time Series Analysis

Training Neural Networks on Data Sources with Unknown Reliability

no code implementations6 Dec 2022 Alexander Capstick, Francesca Palermo, Tianyu Cui, Payam Barnaghi

When data is generated by multiple sources, conventional training methods update models assuming equal reliability for each source and do not consider their individual data quality.

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