Digital Commons Network^™

Usable Authentication: Are We There Yet?, Nathan Clarke, Steven Furnell

School of Engineering, Computing and Mathematics

With technology increasingly embedded in everyday life, the demand for secure and usable authentication methods has never been greater. Traditional password-based systems continue to dominate, despite well-known usability and security challenges. This paper explores the evolution of user authentication technologies, from secret knowledge and tokens to biometrics and emerging approaches such as Passkeys. It critically evaluates the extent to which usability has been achieved, identifying both successes—such as biometrics integrated into smartphones—and persistent issues, including inconsistent guidance, ecosystem dependence, and accessibility barriers. Drawing on academic and commercial developments, the discussion highlights the growing burden on users who must authenticate across …

From Predictions To Explanations: Explainable Ai For Autism Diagnosis And Identification Of Critical Brain Regions: 18th International Joint Conference, Biostec 2025, Kush Gupta, Amir Aly, Emmanuel Ifeachor, Rohit Shankar

School of Engineering, Computing and Mathematics

Autism spectrum disorder (ASD) is a neurodevelopmentalcondition characterized by atypical brain maturation. However, the adaptationof transfer learning paradigms in machine learning for ASD researchremains notably limited. In this study, we propose a computeraideddiagnostic framework with two modules. This chapter presents atwo-module framework combining deep learning and explainable AI forASD diagnosis. The first module leverages a deep learning model finetunedthrough cross-domain transfer learning for ASD classification. Thesecond module focuses on interpreting the model’s decisions and identifyingcritical brain regions. To achieve this, we employed three explainableAI (XAI) techniques: saliency mapping, Gradient-weighted Class ActivationMapping, and SHapley Additive exPlanations (SHAP) analysis.This framework demonstrates that …

Biocompatibility Of Silver And Hydroxyapatite Antimicrobial Nanocoatings On Titanium Alloy Dental Implants With Human Gingival Fibroblasts, S Morgan, R D Handy, V M Salih, R N Salaie, C J Tredwin, A Besinis

School of Engineering, Computing and Mathematics

OBJECTIVES: Peri-implantitis compromises soft and hard tissues around dental implants, often leading to implant failure. Antibacterial nanocoatings offer a promising infection control strategy, but maintaining biocompatibility is essential. This study investigated, through a range of assays and analytical techniques, the biocompatibility of antimicrobial silver and hydroxyapatite (HA) nanocoatings applied to titanium implants with human gingival fibroblasts (HGFs).

METHODS: Silver and hydroxyapatite nanocoatings were applied to the surface of titanium alloy specimens using electroplating, deposition and sintering techniques. The biocompatibility of the nanocoatings with HGFs was assessed by measuring cell metabolic activity (alamarBlue), lactate dehydrogenase (LDH) release, collagen production (Sircol assay), …

Heat Transfer From A Partially Buried Circular Cylinder In Oscillatory Flow, H. Thomas, R. Stuhlmeier, A. G.L. Borthwick, S. Michele

School of Engineering, Computing and Mathematics

With the growing abundance of man-made cylindrical structures located on or close to the seabed, it is important to be able to assess their potential environmental impact. Herein, a model is presented of the viscous-thermal boundary layer in the vicinity of a circular cylinder resting on, or partially buried in, an otherwise flat seabed. To model the influence of wave-induced motions near such a cylinder, we assume oscillatory flow in which the water particle displacements are small with respect to the cylinder radius. A perturbation expansion is utilised to derive solutions of the boundary layer equations, leading to analytical solutions …

The Utility Of Fret/Flim-Based Bioassays For Monitoring Nrf2 Activation In Single Live Cells, Dina Dikovskaya, Albena T Dinkova-Kostova

Peninsula Medical School

The Kelch-like ECH-associated protein 1 - Nuclear factor erythroid 2-related factor 2 (Keap1-Nrf2) partnership is vital for protection against oxidative stress, and its dysregulation has been linked to the pathogenesis of numerous chronic diseases. Under homeostatic conditions, Keap1 targets Nrf2 for ubiquitination and proteasomal degradation. When Keap1 is inactivated by electrophiles or Keap1-Nrf2 protein-protein interaction (PPI) inhibitors (termed inducers), Nrf2 accumulates and, in association with a small musculoaponeurotic fibrosarcoma (sMaf) protein, induces the transcription of networks of genes encoding cytoprotective proteins. To understand the PPIs between Nrf2 and Keap1 and the effect of inducers in the cellular context, we expressed …

Diagnosing Long-Term Divergence In Build Back Better Outcomes In Low- And Lower-Middle-Income Communities, E. A. Opabola, M. Baiguera, A. Raby, T. Rossetto, A. Pomonis, E. Meilianda, Y. Idris, S. Nurdin, K. Adams, D. J. Mcgovern, N. Acikgoz, H. Mistry, F. Marafini

School of Engineering, Computing and Mathematics

Low-income communities in disaster-prone regions face persistent challenges in translating post-disaster recovery investments into sustained resilience, as they navigate trade-offs among engineering objectives, policy constraints, and evolving socio-economic needs. Despite the widespread adoption of Build Back Better (BBB) principles, evidence on the long-term sustainability of outcomes remains limited, particularly in low- and lower-middle-income contexts. This study examines the sustainability of BBB outcomes in two Indonesian case studies: Banda Aceh (approximately 18 years after the 2004 Indian Ocean tsunami) and Central Sulawesi (approximately 4 years after the 2018 earthquake, liquefaction, and tsunami). Drawing on structured housing assessments, household surveys, semi-structured interviews, …

Post-Release Mortality Of European Bass (Dicentrarchus Labrax) Discarded From Small-Scale Estuarine Fishing, J. E. Stewart, T. Stamp, P. Davies, A. Hall, T. Robbins, L. Stewart, E. V. Sheehan

School of Biological and Marine Sciences

Estuaries provide essential habitats for many fish species, but their confined and accessible nature may increase fish vulnerability to capture, and few empirical studies have quantified the value of restricting net fisheries in such areas. Furthermore, management measures for some fisheries promote discarding (e.g., of European sea bass; Dicentrarchus labrax), yet the mortality of fish discarded from small-scale inshore fisheries is poorly understood. We used condition assessments, Reflex Action Mortality Predictor scores and acoustic tracking to evaluate post-release mortality of bass captured in small-scale estuarine netting and angling. Gillnet-caught bass exhibited a range of stress responses and 20%–24% mortality shortly …

On The Edge Of Science?: Commentary On Birch On Edge Of Sentience, Mark Briffa, Lynne U. Sneddon

School of Biological and Marine Sciences

In The Edge of Sentience, Jonathan Birch (2024) provides a thought-provokingsynthesis of current perspectives on animal (and artificial) sentience. He addresses the question from conceptual, ethical, regulatory and empirical viewpoints. Here we focus on some of the scientific issues raised, including defining and operationalising the concept of sentience and the implications for policy and regulation. Despite unresolved conceptual challenges, the book makes a compelling case for the continued scientific investigation of animal sentience.

Investigating Spatial And Seasonal Differences In Microgastropod Assemblages Within The Little-Studied Camamu Bay, Brazil: A Potential Bioindicator For Remote Tropical Areas?, Francisco Kelmo, Sol De Maria Cesar Ferreira, Eduardo Henrique Galvão, Martin J. Attrill

School of Biological and Marine Sciences

This study investigates spatial and seasonal variation in the assemblages of benthic microgastropods (snails < 5–10 mm in length) within a poorly studied tropical bay. As these organisms are abundant, diverse and relatively easy to sample, with well-established taxonomy, they may prove a highly suitable group for ecological studies in such areas. Sediment samples were collected from three river basins in Camamu Bay, Brazil, during the wet and dry seasons. A total of 132 microgastropod species was recorded, demonstrating high diversity. The most abundant species were Eulithidium affine, Bittiolum varium, Cerithium atratum, Vitta virginea and Schwartziella bryerea. The least abundant species were Tenaturris gemma, Turbinella laevigata, Petaloconchus erectus, Parviturboides interruptus and Vitrinella cupidinensis. Statistical analysis revealed significant seasonal and spatial differences in diversity and assemblage composition, which correlated with environmental gradients. The results suggest that microgastropods are a suitable component of the biota for ecological and applied studies in marine sediments, particularly in remote tropical locations where full macrofaunal analysis may be challenging. Whilst further testing across impact gradients is needed, this approach offers a practical solution for ecological investigations in remote regions with limited taxonomic expertise and highlights microgastropods as a useful indicator taxon for impact biomonitoring in tropical marine sediments.

Case Report: Management Of A Challenging Case Presenting With Dysphagia After Thyroidectomy Requiring Administration Of Liquid 131i Via Mic-Key Low-Profile Tube—A Multidisciplinary Approach, Ahmed Ebada Salem, Sandra Ramirez, Brian R Weston, Akram Hussein, Simone Krebs

Faculty, Staff and Student Publications

Radioactive iodine (RAI) therapy with 131-iodine (131I) remains a cornerstone in the postoperative management of differentiated thyroid carcinoma (DTC). The standard route of administration is oral, typically in capsule form and less commonly as a liquid. However, in patients with severe dysphagia and compromised airway, traditional oral 131I delivery may be contraindicated due to the risk of aspiration and radioactivity contamination. These scenarios present unique clinical challenges that necessitate deviation from conventional protocols. While liquid 131I may be administered through the mouth or via nasogastric or percutaneous gastrostomy tubes, there is currently no standardized approach, and potential risks, such as …

Preliminary Examination Of Orexin Receptor Antagonism With Suvorexant In Individuals With Methamphetamine Use Disorder: A Case Series Study, Heather Webber, Jessica Badawi, Douglas Calvillo, Jin Yoon, Michael Weaver, Scott Lane, Joy Schmitz

Faculty, Staff and Student Publications

No abstract provided.

Evolving Molecular Subtypes Of Gastric Cancer: From Past Classifications To Present Consensus And Future Directions For Precision Therapy, Ju-Seog Lee

Faculty, Staff and Student Publications

Gastric cancer is a biologically heterogeneous disease. The advent of high-throughput multi-omic technologies has revolutionized our understanding of gastric cancer by deconstructing this heterogeneous entity into distinct and more homogeneous molecular subtypes. Early classifications based on gene expression, methylation, and histology have laid the groundwork for multi-omic frameworks proposed by The Cancer Genome Atlas and Asian Cancer Research Group, which established the foundation of modern molecular taxonomy. Subsequent integrative efforts, particularly the Consensus Genomic Subtypes (Super 6) model, have unified this collected information into clinically relevant subtypes that bridge prognostic stratification with treatment strategies. Established biomarkers such as human epidermal …

Bop2-Te: Bayesian Optimal Phase 2 Design For Jointly Monitoring Efficacy And Toxicity With Application To Dose Optimization, Kai Chen, Heng Zhou, J Jack Lee, Ying Yuan

Faculty, Staff and Student Publications

We propose a Bayesian optimal phase 2 design for jointly monitoring efficacy and toxicity, referred to as BOP2-TE, to improve the operating characteristics of the BOP2 design proposed by Zhou et al. (2017). BOP2-TE utilizes a Dirichlet-multinomial model to jointly model the distribution of toxicity and efficacy endpoints, making go/no-go decisions based on the posterior probability of toxicity and futility. In comparison to the original BOP2 and other existing designs, BOP2-TE offers the advantage of providing rigorous type I error control in cases where the treatment is toxic and futile, effective but toxic, or safe but futile, while optimizing …

Respiratory Motion Effects And Plan Robustness For Lattice Radiation Therapy, Rachael M Martin-Paulpeter, Peter A Balter, Luis A Perles, Ethan B Ludmir, Joshua S Niedzielski

Faculty, Staff and Student Publications

Introduction: Lattice radiation therapy (LRT), a form of spatially fractionated radiation therapy (SFRT), has shown promise in treating bulky tumors. It consists of hot and cold spots within the tumor, and the ratio between these doses is thought to be important in clinical outcomes. Respiratory motion is expected to degrade these peak-to-valley dose ratios (PVDRs) but has largely been ignored in LRT literature and clinical practice. This work aims to quantify the response of LRT dose distributions to motion to better inform motion management decisions and improve clinical outcomes.

Methods: Respiratory motion of peak-to-peak amplitudes from 0.3 to 2 cm …

Freeze-Dried, Not Frozen: Lyophilized Mesenchymal Stromal Cell-Derived Extracellular Vesicles And Therapeutic Function In Neuroinflammatory Models, Janet R Ashley, Aidan M Collier, Scott D Olson, Charles S Cox

Faculty, Staff and Student Publications

Background: Mesenchymal stromal cell (MSC)-derived extracellular vesicles (EVs) offer a promising acellular therapy for immune modulation, but clinical translation is hindered by variability and storage constraints. Lyophilization (freeze-drying) could enable shelf-stable EV therapeutics, although its effects on biological activity remain incompletely defined.

Study design: We compared the immunomodulatory effects of frozen and lyophilized EVs from bone marrow (BM), adipose tissue (AD), and umbilical cord (UC) MSCs using lipopolysaccharide-stimulated rodent splenocytes and microglial models and human peripheral blood mononuclear cells (PBMCs). Variables included batch scale (small vs large), cytokine priming, and MSC source. Tumor necrosis factor alpha (TNF-α) secretion was measured …

Grading Melanocytic Dysplasia: Updated Histopathologic Criteria, Christopher R Shea, Victor G Prieto, Catherine M Shachaf, Scott R Florell

Faculty, Staff and Student Publications

Dr. Martin C. Mihm, Jr.'s innovative work on the dysplastic nevus achieved a milestone in his chapter in the World Health Organisation Classification of Skin Tumours (WHO-C). WHO-C presents a dichotomous classification (high-grade versus low-grade dysplastic nevi) and a quantitative metric to assess melanocytic nuclear enlargement. The Duke classification is a related approach that provides mostly quantitative histopathologic criteria for dysplastic nevi and gives due weight to architectural features as well as cytology. This paper proposes and illustrates updated criteria for scoring and grading melanocytic dysplasia, incorporating some of the definitions and categories of WHO-C, while refining the quantitative and …

Trial Interviews To Explore Glycogen Storage Disease Type Ia Patient Experiences Following Gene Therapy, Diane M Turner-Bowker, Jessica Butler, Shayna Egan, David A Weinstein, David F Rodriguez-Buritica, Ayesha Ahmad, María-Luz Couce, Rebecca Riba-Wolman, John J Mitchell, Christina Theodore-Oklota

Faculty, Staff and Student Publications

Background: Glycogen storage disease type Ia (GSDIa) is a rare, inherited, autosomal recessive deficiency of glucose-6-phosphatase (G6Pase), an enzyme necessary in glycogenolysis and gluconeogenesis. To maintain normal blood glucose levels and ensure survival, individuals living with GSDIa must frequently consume complex carbohydrates (eg, uncooked cornstarch). Dietary management can result in chronic complications and significant patient burden. DTX401 (pariglasgene brecaparvovec) is an investigational adeno-associated virus serotype 8 vector (AAV8)-based gene therapy designed to restore endogenous glucose production.

Objectives: Patient experience interviews were conducted as part of an open-label, phase 1/2 dose-escalation trial (NCT03517085) evaluating the safety and efficacy of …

Review Of 'The Royal Musical Association: Creating Scholars, Advancing Research' By Leanne Langley, Nuria Bonet

School of Art, Design and Architecture

No abstract provided.

The Impact Of Service Learning On Social Capital And Community Engagement, Jason R. Ross

Journal of Excellence in College Teaching and Learning

Social capital is important for individual and societal advancement. For individuals, social capital helps one advance in the organizational hierarchy but also flows to communities as these individuals are more likely to volunteer for non-profit organizations and pool their resources to advance societal causes. This paper argues that one overlooked mechanism for generating social capital is through service learning. Service learning benefits students not only academically, but professionally as it helps students connect with voluntary organizations, often composed of individuals of means. Students then integrate into the social networks of these influential members and potentially benefit from the resources they …

Retrieval Practice And Student-Centered Learning: Instructional Strategies For Engaging University Classrooms, Carla Williams, Angela Danley

Journal of Excellence in College Teaching and Learning

This paper examines how retrieval practice and student-centered learning—core principles of the Science of Learning—can transform university instruction. Grounded in the Scholarship of Teaching and Learning, the manuscript describes instructional strategies implemented in a redesigned teacher preparation course, including exit tickets, Frayer models, literature circles, choice boards, and collaborative teams. Each strategy operationalizes key learning mechanisms such as retrieval, feedback, reflection, and cognitive load reduction, shifting cognitive effort from instructor to learner. The findings highlight how retrieval-based, student-centered routines enhance engagement, retention, and transfer, offering adaptable approaches for faculty across higher education disciplines.

Enhancing Market Transparency Through Co-Creation Of Csr And Sustainability Ratings Between Firms, Rating Agencies And Customers, Christopher Agyapong Siaw

Plymouth Business School

No abstract provided.

All Life As Witness: Developing A Mode Of Investigation Into Political Disappearance In 1960s Venezuela Reframed By Skinner Releasing Technique And Indigenous Knowledge, Livia Daza-Paris

School of Art, Design and Architecture Theses

This practice-based research develops Ecologies of Poetic Forensics, an investigative mode for approaching political disappearance as a felt, ongoing condition that also reverberates across worlds beyond the human. Focused on my father's disappearance during Venezuela's 1960s revolutionary movement, the research follows relational dynamics within the personal, political, ecological ‘many worlds’ (Indígena Zapatistas 1996) shaped by state violence, including those of campesinos (land-based workers) in Cocorote, Lara State. The inquiry unfolds across Venezuela, Canada, and the United States, tracing territory that exceeds state borders.

The research brings the Skinner Releasing Technique, a movement practice oriented by poetic imagery and embodied …

The Persistent Shock Of The Old: Making The Case For The Responsive Development Of Artwork Deploying Historical Museological Display Techniques., Duncan Cameron

School of Art, Design and Architecture Theses

My sculpture work and thesis investigate the potential of historical museological practices—particularly Victorian and Edwardian display technologies—in contemporary art-making and sculptural practice. I ask three central questions: how can the collection and display of natural history materials be ethically defended in the present day; how might traditional exhibition orthodoxies be reconfigured to privilege the prosaic, domestic, and handmade over the novel and precious; and what role does the idiosyncratic and beautiful play in narrating material stories within an ethical, Anthropocene-aware framework?The study employs a practice-led methodology combining iterative art-making, critical reflection, and active fieldwork. Working from a studio in Somerset, …

Planetarity And Relation: Ecology As Method, Ashish Ghadiali

School of Art, Design and Architecture Theses

The List of Works submitted comprises research through film, text, exhibition, performance and policy engagement, developed during a three-year period from 2021 to 2024 in the site-specific location of Southwest England. This multi-modal and interdisciplinary practice is framed in response to the question of how art and cultural strategy can, in the contexts of climate breakdown and global racial inequity, be conceived of as agency for environmental justice. In this integrative summary, I present a theoretical framework where ecology, in response to conditions of environmental crisis, is understood not only as a subject of inquiry but also as method. In …

Feminism, Domestic Abuse And The Singer-Songwriter, Kathryn Ferguson

School of Art, Design and Architecture Theses

This project explores how feminism and domestic abuse can be articulatedthrough songwriting. Research in music therapy, sociology and popular musicincreasingly speaks to the value of songwriting as a tool for personal andcommunity empowerment, but there is space to actively use songwriting toexplore feminist issues independently of the traditional commercial context ofpopular music. Existing feminist music has been deemed as at its mostsuccessful when it is linked clearly to social change in our communities(Greene, 2017, p.8). Modern popular feminist songwriting has been criticised fornot going far enough in deconstructing systemic patterns of patriarchy (Tong,2024, p.9). Considering this, engaging with academic research …

The Development Of Collaborative Relationships Between Disaster Relief Ngos: Barriers And Solutions, Christopher Phillips

Plymouth Business School Theses

Collaborative responses amongst disaster relief NGOs can be more effective in delivering aid when compared with responses conducted individually. Collaboration enables the sharing of resources, expertise, personnel, and funding, resulting in more efficient aid distribution in the wake of natural disasters. However, current research highlights that it is often challenging for NGOs to establish and sustain collaborative relationships due to different barriers. The challenges these barriers cause have been explored in previous research, but limited attention has been given with respect to how these can be addressed. Additionally, there is a lack of understanding of the relationships between these barriers, …

Analysis Of Volatility Between Macroeconomic Variables And Busan Port Cargo Throughput According To Global Risks, Sang Ho Cho

Plymouth Business School Theses

This study investigates how container (BPC) and non-container (BPB) cargo throughput at Busan Port responds to structural shocks in global and domestic macroeconomic variables, and how their relative importance changes over time. The selection of variables was based on a combination of a Systematic Literature Review (SLR) and semi-structured interviews (SSI). The econometric analysis applied a stepwise framework, employing cumulative Impulse Response Functions (IRF) and Forecast Error Variance Decomposition (FEVD) based on Vector Error Correction Model (VECM) estimations, as well as Historical Decomposition (HD) for specific crisis periods. While IRF and FEVD were used to capture dynamic properties under general …

Driving Venture Success: A Collaborative Framework For The Consumer Goods Industry, Mohammad Alhusaeini Mohammad

Plymouth Business School Theses

This thesis addresses the persistent gap between the strategic promise of external corporate venturing (ECV) and its frequently disappointing outcomes in the global consumer goods industry, with a specific focus on the non-durable consumer goods sub‑sector. Despite ECV’s recognised importance for innovation—particularly in a sector characterised by rapid consumer preference shifts, tight margins, and complex supply chains—collaborations with external start-ups are often undermined by cultural misalignment, strategic ambiguity, and ineffective performance measurement. Through an abductive, mixed-methods research design within an interpretivist paradigm—integrating archival analysis, six in-depth corporate case studies (P&G, PepsiCo, Unilever, Danone, Henkel, and L’Oréal), and 32 interviews with …

Does In-Bed Cycling Delivered Within 48 Hours Of Mechanical Ventilation, Reduce The Occurrence Of Delirium In Critically Ill Patients: A Mixed-Methods Feasibility Randomised Controlled Trial Protocol, Jacqueline Bennion, Mark Hudson, Mary Hickson, Victoria Allgar, Bridie Kent, David Mcwilliams, Daniel Martin

Peninsula Medical School

Background: Delirium is a severe neuropsychiatric clinical state presenting as an acute onset of cognitive deficits. Patients receiving invasive mechanical ventilation (IMV), have the highest incidence (50%–80%) of delirium amongst patients admitted to intensive care units. Preliminary data indicates that early mobilisation is associated with reduced delirium in critically ill patients. However, definitive evidence is lacking. Current practice varies due to many barriers to patients, who require IMV, receiving early mobilisation interventions. In-bed cycling may address some of these barriers. This research aims to evaluate the feasibility and acceptability of early in-bed cycling to reduce delirium in critically ill patients. …

Patient And Practitioner Workshops For An Intellectual Disabilities And Epilepsy Neuropsychiatric Genetic Research Database Register: Ethical Dilemmas For Study Design, Rohit Shankar, Jon Allard, Dannielle Bilkey, Brendan Mclean, Pamela Bowman, Chloe Staples, Lance Watkins, Anna Simpson, Elizabeth Boardman, Sarah Mitchell, Sarah Lennard

Peninsula Medical School

BackgroundThere is a need for more research studies focussed on People with ID (PwID) and Epilepsy and for the design of these studies to be shaped by this complex and vulnerable population and those who care for and support them.AimsTo develop understanding as to how a future NHS genetic research database register for PwID and Epilepsy should be conducted in a way which is inclusive, suitable and appropriate for them, their carers and the NHS settings where the research would be undertaken.MethodsThree workshops were completed with 17 formal participants: (1) PwID and Epilepsy (n2); (2) carers of PwID and Epilepsy …