Search Results for author: Brian Mac Namee

Found 39 papers, 15 papers with code

Explaining Knock-on Effects of Bias Mitigation

no code implementations1 Dec 2023 Svetoslav Nizhnichenkov, Rahul Nair, Elizabeth Daly, Brian Mac Namee

In this paper, we aim to characterise impacted cohorts when mitigation interventions are applied.

Fairness

Distance-Aware eXplanation Based Learning

1 code implementation11 Sep 2023 Misgina Tsighe Hagos, Niamh Belton, Kathleen M. Curran, Brian Mac Namee

eXplanation Based Learning (XBL) is an interactive learning approach that provides a transparent method of training deep learning models by interacting with their explanations.

Image Classification

Unlearning Spurious Correlations in Chest X-ray Classification

no code implementations2 Aug 2023 Misgina Tsighe Hagos, Kathleen M. Curran, Brian Mac Namee

We train a deep learning model using a Covid-19 chest X-ray dataset and we showcase how this dataset can lead to spurious correlations due to unintended confounding regions.

Image Classification Medical Image Classification

Learning from Exemplary Explanations

no code implementations12 Jul 2023 Misgina Tsighe Hagos, Kathleen M. Curran, Brian Mac Namee

eXplanation Based Learning (XBL) is a form of Interactive Machine Learning (IML) that provides a model refining approach via user feedback collected on model explanations.

Image Classification Medical Image Classification

Interpretable Weighted Siamese Network to Predict the Time to Onset of Alzheimer's Disease from MRI Images

1 code implementation14 Apr 2023 Misgina Tsighe Hagos, Niamh Belton, Ronan P. Killeen, Kathleen M. Curran, Brian Mac Namee

To this end, we select progressive MCI patients from the Alzheimer's Disease Neuroimaging Initiative (ADNI) dataset and construct an ordinal dataset with a prediction target that indicates the time to progression to AD.

Image Classification Ordinal Classification

PUnifiedNER: A Prompting-based Unified NER System for Diverse Datasets

1 code implementation27 Nov 2022 Jinghui Lu, Rui Zhao, Brian Mac Namee, Fei Tan

In this work, we present a ``versatile'' model -- the Prompting-based Unified NER system (PUnifiedNER) -- that works with data from different domains and can recognise up to 37 entity types simultaneously, and theoretically it could be as many as possible.

named-entity-recognition Named Entity Recognition +1

Identifying Spurious Correlations and Correcting them with an Explanation-based Learning

no code implementations15 Nov 2022 Misgina Tsighe Hagos, Kathleen M. Curran, Brian Mac Namee

Identifying spurious correlations learned by a trained model is at the core of refining a trained model and building a trustworthy model.

Classification Image Classification

What Makes Pre-trained Language Models Better Zero-shot Learners?

1 code implementation30 Sep 2022 Jinghui Lu, Dongsheng Zhu, Weidong Han, Rui Zhao, Brian Mac Namee, Fei Tan

Current methods for prompt learning in zeroshot scenarios widely rely on a development set with sufficient human-annotated data to select the best-performing prompt template a posteriori.

Language Modelling text-classification +2

Impact of Feedback Type on Explanatory Interactive Learning

no code implementations26 Sep 2022 Misgina Tsighe Hagos, Kathleen M. Curran, Brian Mac Namee

Explanatory Interactive Learning (XIL) collects user feedback on visual model explanations to implement a Human-in-the-Loop (HITL) based interactive learning scenario.

Classification Image Classification +2

Unsupervised domain adaptation and super resolution on drone images for autonomous dry herbage biomass estimation

1 code implementation18 Apr 2022 Paul Albert, Mohamed Saadeldin, Badri Narayanan, Jaime Fernandez, Brian Mac Namee, Deirdre Hennessey, Noel E. O'Connor, Kevin McGuinness

In this context, deep learning algorithms offer a tempting alternative to the usual means of sward composition estimation, which involves the destructive process of cutting a sample from the herbage field and sorting by hand all plant species in the herbage.

Deep Learning Super-Resolution +1

A Rationale-Centric Framework for Human-in-the-loop Machine Learning

1 code implementation ACL 2022 Jinghui Lu, Linyi Yang, Brian Mac Namee, Yue Zhang

We present a novel rationale-centric framework with human-in-the-loop -- Rationales-centric Double-robustness Learning (RDL) -- to boost model out-of-distribution performance in few-shot learning scenarios.

BIG-bench Machine Learning Few-Shot Learning

Semi-supervised dry herbage mass estimation using automatic data and synthetic images

no code implementations26 Oct 2021 Paul Albert, Mohamed Saadeldin, Badri Narayanan, Brian Mac Namee, Deirdre Hennessy, Aisling O'Connor, Noel O'Connor, Kevin McGuinness

Deep learning for computer vision is a powerful tool in this context as it can accurately estimate the dry biomass of a herbage parcel using images of the grass canopy taken using a portable device.

Semantic Segmentation Synthetic Data Generation

Random Walk-steered Majority Undersampling

no code implementations25 Sep 2021 Payel Sadhukhan, Arjun Pakrashi, Brian Mac Namee

In this work, we propose Random Walk-steered Majority Undersampling (RWMaU), which undersamples the majority points of a class imbalanced dataset, in order to balance the classes.

Integrating Unsupervised Clustering and Label-specific Oversampling to Tackle Imbalanced Multi-label Data

no code implementations25 Sep 2021 Payel Sadhukhan, Arjun Pakrashi, Sarbani Palit, Brian Mac Namee

The training dataset is augmented with the set of label-specific synthetic minority points, and classifiers are trained to predict the relevance of each label independently.

Clustering Multi-Label Classification

Pseudo-labelling Enhanced Media Bias Detection

no code implementations16 Jul 2021 Qin Ruan, Brian Mac Namee, Ruihai Dong

Leveraging unlabelled data through weak or distant supervision is a compelling approach to developing more effective text classification models.

Bias Detection Data Augmentation +2

On the Importance of Regularisation & Auxiliary Information in OOD Detection

1 code implementation15 Jul 2021 John Mitros, Brian Mac Namee

Neural networks are often utilised in critical domain applications (e. g. self-driving cars, financial markets, and aerospace engineering), even though they exhibit overconfident predictions for ambiguous inputs.

Out-of-Distribution Detection Out of Distribution (OOD) Detection +1

A Sentence-level Hierarchical BERT Model for Document Classification with Limited Labelled Data

1 code implementation12 Jun 2021 Jinghui Lu, Maeve Henchion, Ivan Bacher, Brian Mac Namee

While with the recent emergence of BERT, deep learning language models can achieve reasonably good performance in document classification with few labelled instances, there is a lack of evidence in the utility of applying BERT-like models on long document classification.

Classification Document Classification +1

The Deep Radial Basis Function Data Descriptor (D-RBFDD) Network: A One-Class Neural Network for Anomaly Detection

no code implementations29 Jan 2021 Mehran H. Z. Bazargani, Arjun Pakrashi, Brian Mac Namee

The Radial Basis Function Data Descriptor (RBFDD) network is an effective solution for anomaly detection, however, it is a shallow model that does not deal effectively with raw data representations.

Anomaly Detection Image Classification +2

Extracting Pasture Phenotype and Biomass Percentages using Weakly Supervised Multi-target Deep Learning on a Small Dataset

no code implementations8 Jan 2021 Badri Narayanan, Mohamed Saadeldin, Paul Albert, Kevin McGuinness, Brian Mac Namee

In this paper, we demonstrate that applying data augmentation and transfer learning is effective in predicting multi-target biomass percentages of different plant species, even with a small training dataset.

Data Augmentation Transfer Learning

Can We Detect Mastitis earlier than Farmers?

no code implementations5 Nov 2020 Cathal Ryan, Christophe Guéret, Donagh Berry, Brian Mac Namee

The aim of this study was to build a modelling framework that would allow us to be able to detect mastitis infections before they would normally be found by farmers through the introduction of machine learning techniques.

Ramifications of Approximate Posterior Inference for Bayesian Deep Learning in Adversarial and Out-of-Distribution Settings

1 code implementation3 Sep 2020 John Mitros, Arjun Pakrashi, Brian Mac Namee

Deep neural networks have been successful in diverse discriminative classification tasks, although, they are poorly calibrated often assigning high probability to misclassified predictions.

Bayesian Inference Out-of-Distribution Detection

Deep Context-Aware Novelty Detection

no code implementations1 Jun 2020 Ellen Rushe, Brian Mac Namee

A common assumption of novelty detection is that the distribution of both "normal" and "novel" data are static.

Novelty Detection

Diverging Divergences: Examining Variants of Jensen Shannon Divergence for Corpus Comparison Tasks

no code implementations LREC 2020 Jinghui Lu, Maeve Henchion, Brian Mac Namee

Jensen-Shannon divergence (JSD) is a distribution similarity measurement widely used in natural language processing.

On the Validity of Bayesian Neural Networks for Uncertainty Estimation

no code implementations3 Dec 2019 John Mitros, Brian Mac Namee

Deep neural networks (DNN) are versatile parametric models utilised successfully in a diverse number of tasks and domains.

Image Classification

Real-time Bidding campaigns optimization using attribute selection

no code implementations29 Oct 2019 Luis Miralles, M. Atif Qureshi, Brian Mac Namee

In contrast, the objective of our research consists of optimising RTB campaigns by finding out configurations that maximise both the number of impressions and their average profitability.

Attribute

Investigating the Effectiveness of Representations Based on Word-Embeddings in Active Learning for Labelling Text Datasets

2 code implementations4 Oct 2019 Jinghui Lu, Maeve Henchion, Brian Mac Namee

Active learning has been shown to be an effective way to alleviate some of the effort required in utilising large collections of unlabelled data for machine learning tasks without needing to fully label them.

Active Learning BIG-bench Machine Learning +1

ZeLiC and ZeChipC: Time Series Interpolation Methods for Lebesgue or Event-based Sampling

no code implementations6 Jun 2019 Matthieu Bellucci, Luis Miralles, M. Atif Qureshi, Brian Mac Namee

Although the interpolation methods for periodic sampling have been a topic of research for a long time, there is a lack of study in methods capable of taking advantage of the Lebesgue sampling characteristics to reconstruct time series more accurately.

Time Series Time Series Analysis

CascadeML: An Automatic Neural Network Architecture Evolution and Training Algorithm for Multi-label Classification

no code implementations23 Apr 2019 Arjun Pakrashi, Brian Mac Namee

Multi-label classification is an approach which allows a datapoint to be labelled with more than one class at the same time.

AutoML General Classification +1

ML-KFHE: Multi-label ensemble classification algorithm exploiting sensor fusion properties of the Kalman filter

no code implementations23 Apr 2019 Arjun Pakrashi, Brian Mac Namee

The Kalman Filter-based Heuristic Ensemble (KFHE) is an ensemble method that exploits the sensor fusion properties of the Kalman filter to combine several classifier models, and that has been shown to be very effective.

General Classification Multi-class Classification +2

A Categorisation of Post-hoc Explanations for Predictive Models

no code implementations4 Apr 2019 John Mitros, Brian Mac Namee

The ubiquity of machine learning based predictive models in modern society naturally leads people to ask how trustworthy those models are?

MeetupNet Dublin: Discovering Communities in Dublin's Meetup Network

1 code implementation6 Oct 2018 Arjun Pakrashi, Elham Alghamdi, Brian Mac Namee, Derek Greene

Meetup. com is a global online platform which facilitates the organisation of meetups in different parts of the world.

Social and Information Networks Computers and Society

Kalman Filter-based Heuristic Ensemble (KFHE): A new perspective on multi-class ensemble classification using Kalman filters

no code implementations30 Jul 2018 Arjun Pakrashi, Brian Mac Namee

This paper introduces a new perspective on multi-class ensemble classification that considers training an ensemble as a state estimation problem.

Classification General Classification

Deep learning at the shallow end: Malware classification for non-domain experts

1 code implementation22 Jul 2018 Quan Le, Oisín Boydell, Brian Mac Namee, Mark Scanlon

Current malware detection and classification approaches generally rely on time consuming and knowledge intensive processes to extract patterns (signatures) and behaviors from malware, which are then used for identification.

Classification General Classification +1

Stability of Topic Modeling via Matrix Factorization

1 code implementation23 Feb 2017 Mark Belford, Brian Mac Namee, Derek Greene

Topic models can provide us with an insight into the underlying latent structure of a large corpus of documents.

Clustering Ensemble Learning +1

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