Search Results for author: Christos Tachtatzis

Found 17 papers, 1 papers with code

On Models and Approaches for Human Vital Signs Extraction from Short Range Radar Signals

no code implementations15 Apr 2024 Mikolaj Czerkawski, Christos Ilioudis, Carmine Clemente, Craig Michie, Ivan Andonovic, Christos Tachtatzis

The paper centres on an assessment of the modelling approaches for the processing of signals in CW and FMCW radar-based systems for the detection of vital signs.

A Novel Micro-Doppler Coherence Loss for Deep Learning Radar Applications

no code implementations12 Apr 2024 Mikolaj Czerkawski, Christos Ilioudis, Carmine Clemente, Craig Michie, Ivan Andonovic, Christos Tachtatzis

Deep learning techniques are subject to increasing adoption for a wide range of micro-Doppler applications, where predictions need to be made based on time-frequency signal representations.

On Input Formats for Radar Micro-Doppler Signature Processing by Convolutional Neural Networks

no code implementations12 Apr 2024 Mikolaj Czerkawski, Carmine Clemente, Craig Michie, Christos Tachtatzis

Convolutional neural networks have often been proposed for processing radar Micro-Doppler signatures, most commonly with the goal of classifying the signals.

Robustness of Deep Neural Networks for Micro-Doppler Radar Classification

no code implementations21 Feb 2024 Mikolaj Czerkawski, Carmine Clemente, Craig Michie, Christos Tachtatzis

Both small temporal shifts and adversarial examples are a result of a model overfitting on features that do not generalize well.

Modelling of Networked Measuring Systems -- From White-Box Models to Data Based Approaches

no code implementations21 Dec 2023 Klaus-Dieter Sommer, Peter Harris, Sascha Eichstädt, Roland Füssl, Tanja Dorst, Andreas Schütze, Michael Heizmann, Nadine Schiering, Andreas Maier, Yuhui Luo, Christos Tachtatzis, Ivan Andonovic, Gordon Gourlay

This paradigm shift holds true in particular for the digital future of measurement in all spheres of our lives and the environment, where data provided by large and complex interconnected systems of sensors are to be analysed.

Detecting Cloud Presence in Satellite Images Using the RGB-based CLIP Vision-Language Model

no code implementations1 Aug 2023 Mikolaj Czerkawski, Robert Atkinson, Christos Tachtatzis

This work explores capabilities of the pre-trained CLIP vision-language model to identify satellite images affected by clouds.

Language Modelling

Neural Weight Step Video Compression

no code implementations2 Dec 2021 Mikolaj Czerkawski, Javier Cardona, Robert Atkinson, Craig Michie, Ivan Andonovic, Carmine Clemente, Christos Tachtatzis

A variety of compression methods based on encoding images as weights of a neural network have been recently proposed.

Video Compression

Neural Knitworks: Patched Neural Implicit Representation Networks

no code implementations29 Sep 2021 Mikolaj Czerkawski, Javier Cardona, Robert Atkinson, Craig Michie, Ivan Andonovic, Carmine Clemente, Christos Tachtatzis

Coordinate-based Multilayer Perceptron (MLP) networks, despite being capable of learning neural implicit representations, are not performant for internal image synthesis applications.

Denoising Image Inpainting +2

Utilising Flow Aggregation to Classify Benign Imitating Attacks

no code implementations6 Mar 2021 Hanan Hindy, Robert Atkinson, Christos Tachtatzis, Ethan Bayne, Miroslav Bures, Xavier Bellekens

The features used in these studies are broadly similar and have demonstrated their effectiveness in situations where cyber-attacks do not imitate benign behaviour.

Leveraging Siamese Networks for One-Shot Intrusion Detection Model

no code implementations27 Jun 2020 Hanan Hindy, Christos Tachtatzis, Robert Atkinson, David Brosset, Miroslav Bures, Ivan Andonovic, Craig Michie, Xavier Bellekens

Supervised ML is based upon learning by example, demanding significant volumes of representative instances for effective training and the need to re-train the model for every unseen cyber-attack class.

Anomaly Detection Intrusion Detection +1

A Taxonomy of Network Threats and the Effect of Current Datasets on Intrusion Detection Systems

2 code implementations9 Jun 2018 Hanan Hindy, David Brosset, Ethan Bayne, Amar Seeam, Christos Tachtatzis, Robert Atkinson, Xavier Bellekens

This manuscript aims to pinpoint research gaps and shortcomings of current datasets, their impact on building Network Intrusion Detection Systems (NIDS) and the growing number of sophisticated threats.

Anomaly Detection Network Intrusion Detection

Machine Learning Approach for Detection of nonTor Traffic

no code implementations29 Aug 2017 Elike Hodo, Xavier Bellekens, Ephraim Iorkyase, Andrew Hamilton, Christos Tachtatzis, Robert Atkinson

A study to compare the reliability and efficiency of Artificial Neural Network and Support vector machine in detecting nonTor traffic in UNB-CIC Tor Network Traffic dataset is presented in this paper.

BIG-bench Machine Learning Intrusion Detection

Threat analysis of IoT networks Using Artificial Neural Network Intrusion Detection System

no code implementations7 Apr 2017 Elike Hodo, Xavier Bellekens, Andrew Hamilton, Pierre-louis Dubouilh, Ephraim Iorkyase, Christos Tachtatzis, Robert Atkinson

The Internet of things (IoT) is still in its infancy and has attracted much interest in many industrial sectors including medical fields, logistics tracking, smart cities and automobiles.

General Classification Network Intrusion Detection

Shallow and Deep Networks Intrusion Detection System: A Taxonomy and Survey

no code implementations9 Jan 2017 Elike Hodo, Xavier Bellekens, Andrew Hamilton, Christos Tachtatzis, Robert Atkinson

Moreover, a taxonomy and survey of shallow and deep networks intrusion detection systems is presented based on previous and current works.

BIG-bench Machine Learning feature selection +1

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