Search Results for author: Payam Barnaghi

Found 23 papers, 6 papers with code

MicroT: Low-Energy and Adaptive Models for MCUs

no code implementations12 Mar 2024 Yushan Huang, Ranya Aloufi, Xavier Cadet, Yuchen Zhao, Payam Barnaghi, Hamed Haddadi

On MCUs, compared to the standard full model inference, MicroT can save up to about 29. 13% in energy consumption.

Knowledge Distillation

Interpreting Differentiable Latent States for Healthcare Time-series Data

no code implementations29 Nov 2023 Yu Chen, Nivedita Bijlani, Samaneh Kouchaki, Payam Barnaghi

Understanding the meaning of latent states is crucial for interpreting machine learning models, assuming they capture underlying patterns.

Predicting Patient Outcomes Time Series

A Markov Chain Model for Identifying Changes in Daily Activity Patterns of People Living with Dementia

1 code implementation20 Jul 2023 Nan Fletcher-Lloyd, Alina-Irina Serban, Magdalena Kolanko, David Wingfield, Danielle Wilson, Ramin Nilforooshan, Payam Barnaghi, Eyal Soreq

Using the COVID-19 pandemic as a natural experiment, we conducted linear mixed-effects modelling to examine changes in mean kitchen activity within a subset of 21 households of PLWD that were continuously monitored for 499 days.

Information Theory Inspired Pattern Analysis for Time-series Data

1 code implementation22 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

Loss Adapted Plasticity in Deep Neural Networks to Learn from Data with Unreliable Sources

1 code implementation6 Dec 2022 Alexander Capstick, Francesca Palermo, Payam Barnaghi

When data is streaming from multiple sources, conventional training methods update model weights often assuming the same level of reliability for each source; that is: a model does not consider data quality of each source during training.

Using Entropy Measures for Monitoring the Evolution of Activity Patterns

no code implementations4 Oct 2022 Yushan Huang, Yuchen Zhao, Hamed Haddadi, Payam Barnaghi

The study uses Internet of Things (IoT) enabled solutions for continuous monitoring of in-home activity, sleep, and physiology to develop care and early intervention solutions to support people living with dementia (PLWD) in their own homes.

Time Series Analysis

Multimodal Federated Learning on IoT Data

no code implementations10 Sep 2021 Yuchen Zhao, Payam Barnaghi, Hamed Haddadi

Federated learning is proposed as an alternative to centralized machine learning since its client-server structure provides better privacy protection and scalability in real-world applications.

Federated Learning

An Intelligent Bed Sensor System for Non-Contact Respiratory Rate Monitoring

no code implementations25 Mar 2021 Qingju Liu, Mark Kenny, Ramin Nilforooshan, Payam Barnaghi

We present an IoT-based intelligent bed sensor system that collects and analyses respiration-associated signals for unobtrusive monitoring in the home, hospitals and care units.

A Hamiltonian Monte Carlo Model for Imputation and Augmentation of Healthcare Data

1 code implementation3 Mar 2021 Narges Pourshahrokhi, Samaneh Kouchaki, Kord M. Kober, Christine Miaskowski, Payam Barnaghi

A Bayesian approach to impute missing values and creating augmented samples in high dimensional healthcare data is proposed in this work.

Bayesian Inference Imputation

An attention model to analyse the risk of agitation and urinary tract infections in people with dementia

1 code implementation18 Jan 2021 Honglin Li, Roonak Rezvani, Magdalena Anita Kolanko, David J. Sharp, Maitreyee Wairagkar, Ravi Vaidyanathan, Ramin Nilforooshan, Payam Barnaghi

We have developed an integrated platform to collect in-home sensor data and performed an observational study to apply machine learning models for agitation and UTI risk analysis.

Data Integration Management +2

Emotive Response to a Hybrid-Face Robot and Translation to Consumer Social Robots

no code implementations8 Dec 2020 Maitreyee Wairagkar, Maria R Lima, Daniel Bazo, Richard Craig, Hugo Weissbart, Appolinaire C Etoundi, Tobias Reichenbach, Prashant Iyenger, Sneh Vaswani, Christopher James, Payam Barnaghi, Chris Melhuish, Ravi Vaidyanathan

The hybrid-face robot concept has been modified, implemented, and released in the commercial IoT robotic platform Miko (My Companion), an affective robot with facial and conversational features currently in use for human-robot interaction in children by Emotix Inc. We demonstrate that human EEG responses to Miko emotions are comparative to neurophysiological responses for actual human facial recognition.

Electroencephalogram (EEG) Robotics

Semi-supervised Federated Learning for Activity Recognition

no code implementations2 Nov 2020 Yuchen Zhao, Hanyang Liu, Honglin Li, Payam Barnaghi, Hamed Haddadi

In this paper, we propose an activity recognition system that uses semi-supervised federated learning, wherein clients conduct unsupervised learning on autoencoders with unlabelled local data to learn general representations, and a cloud server conducts supervised learning on an activity classifier with labelled data.

Data Augmentation Federated Learning +1

Verifying the Causes of Adversarial Examples

no code implementations19 Oct 2020 Honglin Li, Yifei Fan, Frieder Ganz, Anthony Yezzi, Payam Barnaghi

The robustness of neural networks is challenged by adversarial examples that contain almost imperceptible perturbations to inputs, which mislead a classifier to incorrect outputs in high confidence.

Density Estimation

Continual Learning Using Bayesian Neural Networks

no code implementations9 Oct 2019 Honglin Li, Payam Barnaghi, Shirin Enshaeifar, Frieder Ganz

The catastrophic forgetting is an inevitable problem in continual learning models for dynamic environments.

Continual Learning Time Series Analysis

Continual Learning in Deep Neural Network by Using a Kalman Optimiser

no code implementations20 May 2019 Honglin Li, Shirin Enshaeifar, Frieder Ganz, Payam Barnaghi

The results show that our approach enables the model to continually learn and adapt to the new changes without forgetting the previously learned tasks.

Continual Learning

Kalman Filter Modifier for Neural Networks in Non-stationary Environments

no code implementations6 Nov 2018 Honglin Li, Frieder Ganz, Shirin Enshaeifar, Payam Barnaghi

Learning in a non-stationary environment is an inevitable problem when applying machine learning algorithm to real world environment.

BIG-bench Machine Learning

Machine learning for Internet of Things data analysis: A survey

no code implementations17 Feb 2018 Mohammad Saeid Mahdavinejad, Mohammadreza Rezvan, Mohammadamin Barekatain, Peyman Adibi, Payam Barnaghi, Amit P. Sheth

This article assesses the different machine learning methods that deal with the challenges in IoT data by considering smart cities as the main use case.

BIG-bench Machine Learning

Segment Parameter Labelling in MCMC Mean-Shift Change Detection

no code implementations26 Oct 2017 Alireza Ahrabian, Shirin Enshaeifar, Clive Cheong-Took, Payam Barnaghi

This work addresses the problem of segmentation in time series data with respect to a statistical parameter of interest in Bayesian models.

Change Detection Change Point Detection +2

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