http://bura.brunel.ac.uk/handle/2438/8631 2026-05-20T22:42:50Z 2026-05-20T22:42:50Z Xu, X Wu, Q Fan, P Wang, K Cheng, N Chen, W Letaief, KB http://bura.brunel.ac.uk/handle/2438/33318 2026-05-20T02:00:34Z 2026-02-24T00:00:00Z

Title: Velocity-Adaptive Access Scheme for Semantic-Aware Vehicular Networks: Joint Fairness and AoI Optimization Authors: Xu, X; Wu, Q; Fan, P; Wang, K; Cheng, N; Chen, W; Letaief, KB Abstract: In this paper, we address the problem of fair access and Age of Information (AoI) optimization in 5G New Radio (NR) Vehicle to Everything (V2X) Mode 2. Specifically, vehicles need to exchange information with the road side unit (RSU). However, due to the varying vehicle speeds leading to different communication durations, the amount of data exchanged between different vehicles and the RSU may vary. This may poses significant safety risks in high-speed environments. To address this, we define a fairness index through tuning the selection window of different vehicles and consider the image semantic communication system to reduce latency. However, adjusting the selection window may affect the communication time, thereby impacting the AoI. Moreover, considering the re-evaluation mechanism in 5G NR, which helps reduce resource collisions, it may lead to an increase in AoI. We analyze the AoI using Stochastic Hybrid System (SHS) and construct a multi-objective optimization problem to achieve fair access and AoI optimization. Sequential Convex Approximation (SCA) is employed to transform the non-convex problem into a convex one, and solve it using convex optimization. We also provide a large language model (LLM) based algorithm. The scheme's effectiveness is validated through numerical simulations.

2026-02-24T00:00:00Z Najjar, A El Hassani, H Di Renzo, M Wang, K Debbah, M http://bura.brunel.ac.uk/handle/2438/33317 2026-05-20T02:00:31Z 2025-10-26T00:00:00Z

Title: A Mode-Matching Approach to the Design of RIS-Aided Communications Authors: Najjar, A; El Hassani, H; Di Renzo, M; Wang, K; Debbah, M Abstract: Reconfigurable intelligent surface (RIS) is an emerging technology for application to wireless communications. In this paper, we consider the problem of anomalous reflection and model the RIS as a periodic surface impedance boundary. We utilize the mode-matching method and Floquet’s expansion representation to compute the field reflected from a spatially periodic RIS, and evaluate the performance versus implementation complexity tradeoffs of RIS-aided communications based on the global design criterion. This allows us to maximize the power reflected towards the intended direction of propagation, while minimizing the power reradiated towards undesired directions of propagation. In addition, we discuss the advantages of the proposed electromagnetically consistent approach to the design of RIS-aided wireless systems.

2025-10-26T00:00:00Z Hua, EY Mintram, KS Anagnostou, A http://bura.brunel.ac.uk/handle/2438/33230 2026-05-07T13:37:59Z 2025-06-24T00:00:00Z

Title: A Simulation-Based Framework For The Assessment Of Supply Chain Resilience Authors: Hua, EY; Mintram, KS; Anagnostou, A Abstract: Enhancing the resilience of a supply chain (SC) presents a critical and challenging problem. Many of the Key Performance Indicators (KPIs) that measure the operational effectiveness of different SC entities conflict with each other; such conflicts frequently arise between local optimization and global resilience across the SC. Moreover, the SC has hidden brittle points that adversaries could exploit, resulting in degradation of overall SC performance. We propose a framework for assessing the resilience of an SC exposed to exogeneous risks. The framework consists of an agent-based simulation model of a generalized SC, a simulation-based optimization algorithm, and a decision support capability. The project’s continuing research will center on areas such as implementation of the framework to create a tool that enables the sponsor to make data-driven, informed decisions that buttress SC resilience to exogenous risks

2025-06-24T00:00:00Z Kogler, C Roeder, T Tako, A Anagnostou, A http://bura.brunel.ac.uk/handle/2438/33229 2026-05-07T13:38:41Z 2026-04-26T00:00:00Z

Title: An international educational framework for teaching simulation Authors: Kogler, C; Roeder, T; Tako, A; Anagnostou, A Abstract: Teaching Discrete-Event Simulation and Agent-Based Simulation is a complex mission faced by academics around the globe. Challenges include a heterogeneous student cohort with varying prior knowledge and skills, diverse emphases across universities and fields of study, and a lack of structured pedagogical guidance in the scientific literature. This paper presents a novel simulation education framework grounded in constructive alignment. It comprises clearly defined learning objectives based on the revised Bloom’s taxonomy, an innovative pedagogical structure, and an effective learner-centred assessment portfolio. This approach integrates course design elements and practical application examples for individual and collective learning successes. The framework supports the design of learning environments that foster sustained motivation and positive affective engagement in the learning experience. Drawing on decades of teaching simulation experience in the USA, the UK, and Austria, we provide a structured format and practical guidance for educators to support teaching simulation internationally. We address developments of generative Artificial Intelligence and provide guidance for responsible AI-supported learning. Our generic Customise-Build-Align (C-B-A) framework can be adopted and applied across different simulation courses and curricula. We discuss implications for educators, learners, the simulation community, as well as the framework’s relevance for advancing simulation research and practice.

2026-04-26T00:00:00Z