VLDB 2026 Research / reviewers in the wild / expert
Lowri Williams
dblp:167/1910
· DBLP profile ↗
7ranked-venue papers
1as first author
4since 2021 · last 2025
—ORCID · conflict
Domains — the database's venue-derived domains; a paper can count in several
Artificial intelligence and machine learning · 2 · 1 first-authorSecurity and privacy · 2 · 2 since 2021Applied, interdisciplinary, general and emerging computing · 2 · 2 since 2021Computer networks · 1
| Year | Publication | Venue | Position |
|---|---|---|---|
| 2025 | The Role of Artificial Intelligence in Shaping Intelligent Motorways: Opportunities, Challenges, and Real-World ImplementationsabstractThe incorporation of Artificial Intelligence (AI) into transportation infrastructure has drastically reshaped the conception and functioning of motorways worldwide. This paper conducts an in-depth examination of the role and impact of AI-based technologies in intelligent motorways, detailing their mechanisms, data utilisation, and the advantages and disadvantages stemming from their implementation. This review highlights prevalent AI technologies, including Automated Incident Detection Systems (AIDs), Automated Number Plate Recognition (ANPR), and Traffic Prediction and Management Systems, elucidating the unique AI algorithms that drive these systems and the distinct data types they harness. The paper also underscores real-world examples of these technologies in operation, offering practical insights into their application. It also explores the potential issues surrounding AI integration, focusing on adversarial machine learning attacks and concept drift that pose significant challenges to the robustness and security of AI systems in transportation. Subsequently, the overarching aim of this paper is to facilitate a comprehensive understanding of the current state of AI implementation in motorways and to stimulate further research and dialogue on the rapidly evolving intersection of AI and transportation. As such, this comprehensive review serves as a valuable resource for policymakers, industry practitioners, and researchers, fostering a well-rounded understanding of AI’s transformative role in modern motorways while highlighting areas that demand further exploration. The integration of AI into transportation infrastructure has significantly reshaped the operation of motorways worldwide. This paper provides a comprehensive review of AI applications in intelligent motorways, focusing on technologies such as Automated Incident Detection Systems (AIDs), Traffic Prediction Models, and Digital Twins. It examines real-world implementations and highlights challenges, including adversarial attacks, concept drift, and data privacy concerns. To address these challenges, we propose a structured evaluation framework emphasising explainability, robustness, and fairness. By identifying key research and policy gaps—spanning ethics, transparency, and public trust—the paper outlines actionable insights and future research priorities. Case studies offer practical examples, making this work a valuable resource for policymakers, industry practitioners, and researchers aiming to advance the safe and effective deployment of AI in transportation systems. Eirini Anthi, Lowri Williams, Hamza Ahmad Afzal, Bilal Ahmad Brar, Joydip Bhowmick, Kabir Gujral, Emyr Thomas |
IEEE Trans. Intell. Transp. Syst. | 2 |
| 2021 | Computational strategies to combat COVID-19: useful tools to accelerate SARS-CoV-2 and coronavirus researchabstractSARS-CoV-2 (severe acute respiratory syndrome coronavirus 2) is a novel virus of the family Coronaviridae. The virus causes the infectious disease COVID-19. The biology of coronaviruses has been studied for many years. However, bioinformatics tools designed explicitly for SARS-CoV-2 have only recently been developed as a rapid reaction to the need for fast detection, understanding and treatment of COVID-19. To control the ongoing COVID-19 pandemic, it is of utmost importance to get insight into the evolution and pathogenesis of the virus. In this review, we cover bioinformatics workflows and tools for the routine detection of SARS-CoV-2 infection, the reliable analysis of sequencing data, the tracking of the COVID-19 pandemic and evaluation of containment measures, the study of coronavirus evolution, the discovery of potential drug targets and development of therapeutic strategies. For each tool, we briefly describe its use case and how it advances research specifically for SARS-CoV-2. All tools are free to use and available online, either through web applications or public code repositories. Contact:[email protected]. Franziska Hufsky, Kevin Lamkiewicz, Alexandre Almeida, Abdel Aouacheria, Cecilia N. Arighi, Alex Bateman, Jan Baumbach, Niko Beerenwinkel, Christian Brandt, Marco Cacciabue, Sara Chuguransky, Oliver Drechsel, Robert D. Finn, Adrian Fritz, Stephan Fuchs, Georges Hattab, Anne-Christin Hauschild, Dominik Heider, Marie Hoffmann, Martin Hölzer, Stefan Hoops, Lars Kaderali, Ioanna Kalvari, Max von Kleist, Renó Kmiecinski, Denise Kühnert, Gorka Lasso, Pieter Libin, Markus List, Hannah F. Löchel, Maria Jesus Martin, Roman Martin, Julian O. Matschinske, Alice C. McHardy, Pedro Mendes 0001, Jaina Mistry, Vincent Navratil, Eric P. Nawrocki, Áine Niamh O'toole, Nancy Ontiveros-Palacios, Anton I. Petrov, Guillermo Rangel-Pineros, Nicole Redaschi, Susanne Reimering, Knut Reinert, Lorna J. Richardson, David L. Robertson, Sepideh Sadegh, Joshua B. Singer, Kristof Theys, Chris Upton, Marius Welzel, Lowri Williams, Manja Marz |
Briefings Bioinform. | 54 |
| 2021 | Hardening machine learning denial of service (DoS) defences against adversarial attacks in IoT smart home networksabstractMachine learning based Intrusion Detection Systems (IDS) allow flexible and efficient automated detection of cyberattacks in Internet of Things (IoT) networks. However, this has also created an additional attack vector; the machine learning models which support the IDS’s decisions may also be subject to cyberattacks known as Adversarial Machine Learning (AML). In the context of IoT, AML can be used to manipulate data and network traffic that traverse through such devices. These perturbations increase the confusion in the decision boundaries of the machine learning classifier, where malicious network packets are often miss-classified as being benign. Consequently, such errors are bypassed by machine learning based detectors, which increases the potential of significantly delaying attack detection and further consequences such as personal information leakage, damaged hardware, and financial loss. Given the impact that these attacks may have, this paper proposes a rule-based approach towards generating AML attack samples and explores how they can be used to target a range of supervised machine learning classifiers used for detecting Denial of Service attacks in an IoT smart home network. The analysis explores which DoS packet features to perturb and how such adversarial samples can support increasing the robustness of supervised models using adversarial training. The results demonstrated that the performance of all the top performing classifiers were affected, decreasing a maximum of 47.2 percentage points when adversarial samples were present. Their performances improved following adversarial training, demonstrating their robustness towards such attacks. Eirini Anthi, Lowri Williams, Amir Javed, Pete Burnap |
Comput. Secur. | 2 |
| 2021 | Adversarial attacks on machine learning cybersecurity defences in Industrial Control SystemsabstractThe proliferation and application of machine learning-based Intrusion Detection Systems (IDS) have allowed for more flexibility and efficiency in the automated detection of cyber attacks in Industrial Control Systems (ICS). However, the introduction of such IDSs has also created an additional attack vector; the learning models may also be subject to cyber attacks, otherwise referred to as Adversarial Machine Learning (AML). Such attacks may have severe consequences in ICS systems, as adversaries could potentially bypass the IDS. This could lead to delayed attack detection which may result in infrastructure damages, financial loss, and even loss of life. This paper explores how adversarial learning can be used to target supervised models by generating adversarial samples using the Jacobian-based Saliency Map attack and exploring classification behaviours. The analysis also includes the exploration of how such samples can support the robustness of supervised models using adversarial training. An authentic power system dataset was used to support the experiments presented herein. Overall, the classification performance of two widely used classifiers, Random Forest and J48, decreased by 6 and 11 percentage points when adversarial samples were present. Their performances improved following adversarial training, demonstrating their robustness towards such attacks. Eirini Anthi, Lowri Williams, Matilda Rhode, Pete Burnap, Adam Wedgbury |
J. Inf. Secur. Appl. | 2 |
| 2020 | Idiom-Based Features in Sentiment Analysis: Cutting the Gordian KnotabstractIn this paper we describe an automated approach to enriching sentiment analysis with idiom-based features. Specifically, we automated the development of the supporting lexico-semantic resources, which include (1) a set of rules used to identify idioms in text and (2) their sentiment polarity classifications. Our method demonstrates how idiom dictionaries, which are readily available general pedagogical resources, can be adapted into purpose-specific computational resources automatically. These resources were then used to replace the manually engineered counterparts in an existing system, which originally outperformed the baseline sentiment analysis approaches by 17 percentage points on average, taking the F-measure from 40s into 60s. The new fully automated approach outperformed the baselines by 8 percentage points on average taking the F-measure from 40s into 50s. Although the latter improvement is not as high as the one achieved with the manually engineered features, it has got the advantage of being more general in a sense that it can readily utilize an arbitrary list of idioms without the knowledge acquisition overhead previously associated with this task, thereby fully automating the original approach. Irena Spasic, Lowri Williams, Andreas Buerki |
IEEE Trans. Affect. Comput. | 2 |
| 2019 | A Supervised Intrusion Detection System for Smart Home IoT DevicesabstractThe proliferation in Internet of Things (IoT) devices, which routinely collect sensitive information, is demonstrated by their prominence in our daily lives. Although such devices simplify and automate every day tasks, they also introduce tremendous security flaws. Current insufficient security measures employed to defend smart devices make IoT the “weakest” link to breaking into a secure infrastructure, and therefore an attractive target to attackers. This paper proposes a three layer intrusion detection system (IDS) that uses a supervised approach to detect a range of popular network based cyber-attacks on IoT networks. The system consists of three main functions: 1) classify the type and profile the normal behavior of each IoT device connected to the network; 2) identifies malicious packets on the network when an attack is occurring; and 3) classifies the type of the attack that has been deployed. The system is evaluated within a smart home testbed consisting of eight popular commercially available devices. The effectiveness of the proposed IDS architecture is evaluated by deploying 12 attacks from 4 main network based attack categories, such as denial of service (DoS), man-in-the-middle (MITM)/spoofing, reconnaissance, and replay. Additionally, the system is also evaluated against four scenarios of multistage attacks with complex chains of events. The performance of the system's three core functions result in an F-measure of: 1) 96.2%; 2) 90.0%; and 3) 98.0%. This demonstrates that the proposed architecture can automatically distinguish between IoT devices on the network, whether network activity is malicious or benign, and detect which attack was deployed on which device connected to the network successfully. Eirini Anthi, Lowri Williams, Malgorzata Slowinska, George Theodorakopoulos 0001, Pete Burnap |
IEEE Internet Things J. | 2 |
| 2015 | The role of idioms in sentiment analysisabstractIn this paper we investigate the role of idioms in automated approaches to sentiment analysis. To estimate the degree to which the inclusion of idioms as features may potentially improve the results of traditional sentiment analysis, we compared our results to two such methods. First, to support idioms as features we collected a set of 580 idioms that are relevant to sentiment analysis, i.e. the ones that can be mapped to an emotion. These mappings were then obtained using a web-based crowdsourcing approach. The quality of the crowdsourced information is demonstrated with high agreement among five independent annotators calculated using Krippendorff’s alpha coefficient (α = 0.662). Second, to evaluate the results of sentiment analysis, we assembled a corpus of sentences in which idioms are used in context. Each sentence was annotated with an emotion, which formed the basis for the gold standard used for the comparison against two baseline methods. The performance was evaluated in terms of three measures – precision, recall and F-measure. Overall, our approach achieved 64% and 61% for these three measures in two experiments improving the baseline results by 20 and 15 percent points respectively. F-measure was significantly improved over all three sentiment polarity classes: Positive, Negative and Other. Most notable improvement was recorded in classification of positive sentiments, where recall was improved by 45 percent points in both experiments without compromising the precision. The statistical significance of these improvements was confirmed by McNemar’s test. Lowri Williams, Christian Bannister, Michael Arribas-Ayllon, Alun D. Preece, Irena Spasic |
Expert Syst. Appl. | 1 |