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Positive state reachability for positive linear control systems in continuous time (2025)
Journal Article
Guiver, C., Rebarber, R., & Townley, S. (in press). Positive state reachability for positive linear control systems in continuous time. Journal of The Franklin Institute. https://www.sciencedirect.com/journal/journal-of-the-franklin-institute

Positive control systems is the established framework for studying control systems where both the state- and control/input-variables are constrained to remain positive (more accurately, nonnegative). Numerous models of applied interest fall into this... Read More about Positive state reachability for positive linear control systems in continuous time.

Development of Rainwater Hydroelectric and Solar Technologies for Renewable Energy towards Sustainability Campus (2025)
Presentation / Conference Contribution
Kamarudin, M. K. A., Abdullah, S. N. F., Mohd Saudi, A. S., Ismail, I. N., Mahamad Ali, F., Abd Rahman, L., & Muhammad-Sukki, F. (n.d.). Development of Rainwater Hydroelectric and Solar Technologies for Renewable Energy towards Sustainability Campus. Proceedings of International Exchange and Innovation Conference on Engineering & Sciences (IEICES). Kyushu University Library. https://www.lib.kyushu-u.ac.jp/en/publications_kyushu/ieices

This research assesses the development of rainwater hydroelectric and solar technologies for renewable energy towards sustainability campus at Universiti Sultan Zainal Abidin (UniSZA) Malaysia to support sustainability campus in Green Campus agenda.... Read More about Development of Rainwater Hydroelectric and Solar Technologies for Renewable Energy towards Sustainability Campus.

Enhancing base-diesel fuel specification for optimized biodiesel blending in Malaysia (2025)
Journal Article
Subramaniam, M., Sarip, S., Mad Kaidi, H., & Muhammad-Sukki, F. (2025). Enhancing base-diesel fuel specification for optimized biodiesel blending in Malaysia. Sustainable Futures, 10, 101428. https://doi.org/10.1016/j.sftr.2025.101428

This research explores the enhancement of base-diesel fuel specifications to optimize biodiesel blending in Malaysia, aiming to support the nation’s transition toward sustainable energy practices. Biodiesel, specifically Palm Oil Methyl Ester (PME),... Read More about Enhancing base-diesel fuel specification for optimized biodiesel blending in Malaysia.

Application of CEEMDAN algorithm in roundness error evaluation (2025)
Journal Article
Chen, Y., Wu, Y., & Tingas, E.-A. (2025). Application of CEEMDAN algorithm in roundness error evaluation. Engineering Research Express, 7(4), 045534. https://doi.org/10.1088/2631-8695/ae0f09

Roundness error is an important evaluation criterion for evaluating machining errors. Some advanced algorithms have been applied to roundness assessment, such as the empirical mode decomposition (EMD) algorithm. However, due to the issue of mode mixi... Read More about Application of CEEMDAN algorithm in roundness error evaluation.

A note on incremental stability of externally positive Lurie systems (2025)
Journal Article
Drummond, R., Guiver, C., & Turner, M. C. (2025). A note on incremental stability of externally positive Lurie systems. IEEE Transactions on Automatic Control. Advance online publication. https://doi.org/10.1109/TAC.2025.3615246

The Kalman conjecture is shown to be true for Lurie systems in which the linear part is externally positive and the nonlinear element satisfies a generalised incremental gain bound. It is shown further that the system satisfies a range of both tradit... Read More about A note on incremental stability of externally positive Lurie systems.

Elucidating reaction dynamics in a model of human brain energy metabolism (2025)
Journal Article
Patsatzis, D. G., Tingas, E.-A., Sarathy, S. M., Goussis, D. A., & Jolivet, R. B. (2025). Elucidating reaction dynamics in a model of human brain energy metabolism. PLOS Computational Biology, 21(9), e1013504. https://doi.org/10.1371/journal.pcbi.1013504

Energy metabolism is essential to brain function and Bioinformatics, but its study is experimentally challenging. Similarly, biologically accurate computational models are too complex for simple investigations. Here, we analyse an experimentally-cali... Read More about Elucidating reaction dynamics in a model of human brain energy metabolism.

Hotspots in lithium-ion battery pouch cells: Models and bounds (2025)
Presentation / Conference Contribution
Drummond, R., Guiver, C., Turner, M. C., Tredenick, E. C., & Duncan, S. R. (2025). Hotspots in lithium-ion battery pouch cells: Models and bounds. 2025 IEEE Conference on Control Technology and Applications (CCTA) (pp. 396-401). Institute of Electrical and Electronics Engineers. https://doi.org/10.1109/CCTA53793.2025.11151280

Lithium-ion batteries have grown larger in recent years in response to the need to increase pack-level energy densities. One of the main issues that emerges in these large format cells are heterogeneities. In particular, temperature hotspots in large... Read More about Hotspots in lithium-ion battery pouch cells: Models and bounds.

Hydrogen and vector fuels at the crossroads: Integrative perspectives on infrastructure, policy, and market readiness (2025)
Presentation / Conference Contribution
Tingas, E.-A., & Taylor, A. M. K. P. (2025). Hydrogen and vector fuels at the crossroads: Integrative perspectives on infrastructure, policy, and market readiness. In E.-A. Tingas, & A. M. K. P. Taylor (Eds.), Forum Proceedings - 2025 Hydrogen & Vector Fuels Policy Forum: Expert Insights, 6 May 2025. Edinburgh Napier University. https://www.ieacombustion.com/app/download/9540764775/20250506_H2Forum_proceedings.pdf?t=1753303986

First Steps towards Categorical Algebraic Artificial Chemistry (2025)
Presentation / Conference Contribution
Pratt-Johns, J., St. Clere Smithe, T., Guiver, C., Hughes, K., & Andras, P. (n.d.). First Steps towards Categorical Algebraic Artificial Chemistry. Eighth International Conference on Applied Category Theory. Open Publishing Association. https://doi.org/10.4204/EPTCS

We construct a functor that gives a dynamics to an algebraic model of interacting components. The construction generalises a computational model of Fontana and Buss in the field of artificial life known as AlChemy, in which molecules and their chemic... Read More about First Steps towards Categorical Algebraic Artificial Chemistry.

Determination of singular control in the optimal management of natural resources (2025)
Journal Article
Guiver, C., & Opmeer, M. R. (2025). Determination of singular control in the optimal management of natural resources. Applied Mathematics and Optimization, 91(3). https://doi.org/10.1007/s00245-025-10257-3

A method is presented to simplify the determination of solutions of certain optimal control problems which commonly arise in natural resource management and bioeconomic contexts. The method, termed the resource-value balance method, essentially lever... Read More about Determination of singular control in the optimal management of natural resources.

Passivity theorems for input-to-state stability of forced Lur’e inclusions and equations, and consequent entrainment-type properties (2025)
Journal Article
Guiver, C. (2025). Passivity theorems for input-to-state stability of forced Lur’e inclusions and equations, and consequent entrainment-type properties. ESAIM: Control, Optimisation and Calculus of Variations, 31, 22. https://doi.org/10.1051/cocv/2025013

A suite of input-to-state stability results are presented for a class of forced differential inclusions, so-called Lur’e inclusions. As a consequence, semi-global incremental input-to-state stability results for systems of forced Lur’e differential e... Read More about Passivity theorems for input-to-state stability of forced Lur’e inclusions and equations, and consequent entrainment-type properties.

Dynamic properties of a class of forced positive higher-order scalar difference equations: persistency, stability and convergence (2025)
Journal Article
Franco, D., Guiver, C., Logemann, H., & Perán, J. (2025). Dynamic properties of a class of forced positive higher-order scalar difference equations: persistency, stability and convergence. Journal of Difference Equations and Applications, 31(6), 790–824. https://doi.org/10.1080/10236198.2025.2461530

Persistency, stability and convergence properties are considered for a class of nonlinear, forced, positive, scalar higher-order difference equations. Sufficient conditions for these properties to hold are derived, broadly in terms of the interplay o... Read More about Dynamic properties of a class of forced positive higher-order scalar difference equations: persistency, stability and convergence.

A Computational Study of a Solid Oxide Fuel Cell-Turbofan Engine Hybrid Propulsion System Fueled by Ammonia and Hydrogen (2025)
Presentation / Conference Contribution
Wagner, L., & Tingas, E.-A. (2025, January 6-10). A Computational Study of a Solid Oxide Fuel Cell-Turbofan Engine Hybrid Propulsion System Fueled by Ammonia and Hydrogen [Paper presentation]. AIAA SCITECH 2025 Forum, Orlando, Florida. https://doi.org/10.2514/6.2025-0327

This study presents the theoretical evaluation of a hybrid aero-propulsion system that combines a Solid Oxide Fuel Cell (SOFC) with a commercial turbofan engine (JT9D), fuelled by an ammonia and hydrogen fuel blend, the latter produced by an onboard... Read More about A Computational Study of a Solid Oxide Fuel Cell-Turbofan Engine Hybrid Propulsion System Fueled by Ammonia and Hydrogen.

Computational Investigation of Laminar Premixed Hydrogen/Ammonia Flames at Sub-Atmospheric Conditions (2025)
Presentation / Conference Contribution
Tule, D., & Tingas, E.-A. (2025, January 6-10). Computational Investigation of Laminar Premixed Hydrogen/Ammonia Flames at Sub-Atmospheric Conditions [Paper presentation]. AIAA SCITECH 2025 Forum, Orlando, Florida. https://doi.org/10.2514/6.2025-2650

The increasing urgency to address global warming has highlighted the need to explore alternative fuels for the transport sector, a significant contributor to carbonemissions. Hydrogen and ammonia have emerged as promising candidates, each with distin... Read More about Computational Investigation of Laminar Premixed Hydrogen/Ammonia Flames at Sub-Atmospheric Conditions.

Quantifying the impact of environmental changes on migratory species: a model perturbation framework (2024)
Journal Article
Smith, P., Adams, B., & Guiver, C. (2024). Quantifying the impact of environmental changes on migratory species: a model perturbation framework. Frontiers in Ecology and Evolution, 12, 1426018. https://doi.org/10.3389/fevo.2024.1426018

Migratory species use different habitats and pathways across their migratory route. Pathway contribution metrics are transient metrics of population growth, derived from population models, and quantify the predicted contribution of an individual, tra... Read More about Quantifying the impact of environmental changes on migratory species: a model perturbation framework.

A mixed passivity/small-gain theorem for Sobolev input-output stability (2024)
Journal Article
Guiver, C., Logemann, H., & Opmeer, M. R. (2024). A mixed passivity/small-gain theorem for Sobolev input-output stability. SIAM Journal on Control and Optimization, 62(6), 3042-3075. https://doi.org/10.1137/24M1643128

A stability theorem for the feedback connection of two (possibly infinite-dimensional) time-invariant linear systems is presented. The theorem is formulated in the frequency domain and is in the spirit of combined passivity/small-gain results. It pla... Read More about A mixed passivity/small-gain theorem for Sobolev input-output stability.

A linear dissipativity approach to incremental input-to-state stability for a class of positive Lur’e systems (2024)
Journal Article
Piengeon, V., & Guiver, C. (2025). A linear dissipativity approach to incremental input-to-state stability for a class of positive Lur’e systems. International Journal of Control, 98(6), 1466-1479. https://doi.org/10.1080/00207179.2024.2403473

Incremental stability properties are considered for certain systems of forced, nonlinear differential equations with a particular positivity structure. An incremental stability estimate is derived for pairs of input/state/output trajectories of the L... Read More about A linear dissipativity approach to incremental input-to-state stability for a class of positive Lur’e systems.

Advancing sustainable building through passive cooling with phase change materials, a comprehensive literature review (2024)
Journal Article
Ghamari, M., See, C. H., Hughes, D., Mallick, T., Reddy, K. S., Patchigolla, K., & Sundaram, S. (2024). Advancing sustainable building through passive cooling with phase change materials, a comprehensive literature review. Energy and Buildings, 312, 114164. https://doi.org/10.1016/j.enbuild.2024.114164

Phase Change Materials (PCMs) present cutting-edge technology with substantial promise for advancing sustainable and energy-efficient cooling in buildings. These materials can absorb and release latent heat during phase transitions, facilitating ther... Read More about Advancing sustainable building through passive cooling with phase change materials, a comprehensive literature review.