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Publicações

2026

The influence of School principals' management on school efficiency: Evidence from Italian schools

Autores
Mergoni, A; Camanho, A; Soncin, M; Agasisti, T; De Witte, K;

Publicação
EUROPEAN JOURNAL OF OPERATIONAL RESEARCH

Abstract
This paper investigates the relationship between school principals' managerial practices and two key mensions of school performance: students' cognitive outcomes and school climate. School performance assessed using a classical Data Envelopment Analysis (DEA) framework, complemented by both unconditional robust and conditional robust models to evaluate the influence of managerial practices on school efficiency. We introduce a methodological innovation that allows for a nuanced analysis of how contextual variables-specifically, principals' managerial practices-affect performance, both individually and through their interactions. The analysis is based on 2019 INVALSI data from a nationally representative sample of 8th grade students in Italian schools. The findings show that principals' practices, as well as the ways in which these practices interact, play a significant role in shaping school efficiency, particularly by promoting a positive supportive school climate.

2026

Optimizing Mobile IAB Deployment and Scheduling in Obstruction-Prone 6G Seaport Networks

Autores
Correia, PF; Coelho, A; Ricardo, M;

Publicação
IEEE ACCESS

Abstract
Integrated Access and Backhaul (IAB) technology in cellular networks operating in the 3.x GHz band combines access and backhaul functionalities within a wireless framework, reducing dependence on fiber-based solutions and enabling cost-efficient, flexible network expansion. Deploying a mobile IAB (MIAB) in obstruction-prone environments, such as seaports, offers on-demand capacity and resilience but poses unique challenges due to severe shadowing from dense physical obstacles. This paper presents a three-dimensional, obstacle-aware model for optimal MIAB placement and scheduler selection in networks comprising user equipments (UEs) and fixed IABs (FIABs). We evaluate user and backhaul association patterns under different scheduling strategies, including Round-Robin (RR) and Weighted Round-Robin (WRR), ensuring that both MIABs and FIABs meet UE application-layer capacity demands without exceeding backhaul limits. A genetic algorithm (GA)-based optimizer is employed to explore deployment configurations under varying FIAB densities, number of UEs, and obstacles. Results show that MIAB assistance yields the greatest benefits in sparse FIAB networks and low-UE scenarios, with capacity gains reaching up to 350%. MIAB delivers the greatest added value in the presence of obstacles. In contrast, dense FIAB deployments exhibit diminishing returns from MIAB integration. Across most of the evaluated conditions, WRR outperforms RR by enabling fairer and more adaptive resource blocks (RBs) allocation. These findings provide practical guidance for targeted MIAB deployment strategies that balance infrastructure investment, environmental constraints, and scheduling policies.

2026

Interactive In-App Guidance for Healthcare Software Onboarding: A Systematic Review and Mixed-Methods Survey (Preprint)

Autores
Lopes, V; S. Mamede, H; Santos, A;

Publicação

Abstract
BACKGROUND

Healthcare organizations increasingly rely on complex digital systems, but software onboarding often depends on manuals and classroom-based training that do not fit well with fast-paced clinical workflows. Interactive in-app guidance may better support learning during real work, although healthcare-specific evidence is still limited.

OBJECTIVE

To synthesize evidence on effective onboarding mechanisms for healthcare software and to explore how interactive in-app guidance compares with traditional onboarding in terms of perceived learning support, cognitive burden, and adoption-related outcomes.

METHODS

The study used a sequential design with two components: (1) a systematic literature review following Kitchenham’s procedures; and (2) a mixed-methods survey administered via Qualtrics to healthcare professionals (n = 44), complemented by a small screened subsample of IT professionals with healthcare DAP implementation experience (n = 5). Quantitative data were analysed descriptively, and qualitative responses were examined through thematic analysis to explain and contextualize the observed patterns.

RESULTS

The findings from both the literature review and the survey showed a consistent pattern: workflow-embedded onboarding approaches, including hands-on practice, stepwise contextual guidance, and searchable in-app support, were perceived to reduce learning friction and cognitive effort while improving confidence. Among healthcare respondents, 61% reported greater willingness to use the software after onboarding. Continued use was mainly associated with remembering how to use features, interface usability, workflow efficiency, and perceived impact on patient care. IT respondents highlighted implementation constraints related to integration, analytics, and compliance, but also perceived reductions in support burden.

CONCLUSIONS

Interactive, context-sensitive onboarding appears to be a practical strategy to support healthcare software adoption, especially because it aligns learning with real workflows. The findings support the use of workflow-embedded guidance to improve usability in context and user confidence during onboarding, while also indicating the need for stronger healthcare-specific, outcome-based evaluations of DAP-enabled approaches.

2026

Toward a Holistic Framework for Human-AI Collaboration in Safety-Critical Systems

Autores
Bessa, J; Leyli Abadi, M; Yagoubi, M; Boos, D; Borst, C; Castagna, A; Chavarriaga, R; Dias, D; Egli, A; Eisenegger, A; Ellerbroek, J; Fedorova, A; Felix, C; Fuxjäger, A; Geraldes, J; Hamouche, S; Hassouna, M; Kop, S; Lemetayer, B; Leto, G; Liessner, R; Lundberg, J; Marot, A; Meddeb, M; Meyer, M; Sales, H; Schiaffonati, V; Schneider, M; Sturm, I; Usher, J; Van Hoof, H; Viebahn, J; Wäfler, T; Zanotti, G;

Publicação
Artificial Intelligence, Data and Robotics: Foundations, Transformations and Future Directions

Abstract
The integration of artificial intelligence (AI) into safety-critical systems, where human operators remain central to decision-making, introduces various challenges that existing AI frameworks struggle to address comprehensively. Key concerns involve designing a socio-technical system that balances AI transparency, trust, and explainability with the imperative for robust and reliable decision-making. Presently, while numerous sector-specific solutions exist, a holistic framework that effectively integrates human expertise with AI capabilities remains absent, leaving critical gaps in system design, deployment, and oversight. This chapter proposes a multidisciplinary conceptual framework to enhance human-AI collaboration in critical infrastructures such as power grids, railways, and air traffic management. The different design steps were guided by the requirements of these industrial domains. The framework combines key design principles that support human cognition, leveraging insights from decision theory, mathematics, and specialized engineering domains to optimize AI-assisted decision-making. Furthermore, it embeds trustworthiness and risk assessment methodologies, using tools such as the Assessment List for Trustworthy Artificial Intelligence (ALTAI) tool to ensure compliance with ethical and regulatory requirements. © The Editor(s) (if applicable) and The Author(s) 2026.

2026

A Simulation-Driven Trust-Aware Federated Learning Framework for Robust Intelligent IoT Networks

Autores
Reis, MJCS; Serôdio, C; Branco, F;

Publicação
APPLIED SCIENCES-BASEL

Abstract
Federated learning (FL) has emerged as a promising paradigm for enabling distributed intelligence in Internet of Things (IoT) environments while preserving data privacy and reducing the need for centralized data collection. However, the practical deployment of FL in IoT scenarios remains challenging due to heterogeneous data distributions, unreliable communication conditions, and the presence of faulty or malicious edge devices that can disrupt collaborative training. These limitations can significantly degrade convergence stability and predictive performance, particularly in resource-constrained and intermittently connected networks. This paper proposes a simulation-driven trust-aware federated learning framework for robust intelligent IoT networks. The proposed approach incorporates a dynamic trust-based aggregation mechanism that adaptively weights client contributions based on the consistency of their local model updates with the global model state. In addition, a controlled IoT-oriented federated simulation environment is developed to emulate heterogeneous edge conditions, including non-independent and identically distributed (non-IID) data partitioning, adversarial model manipulation, and intermittent client connectivity caused by communication dropouts. Extensive multi-seed experiments were conducted on the UCI Human Activity Recognition (UCI HAR) dataset and complemented with an auxiliary CIFAR-10 convolutional neural network (CNN) validation scenario. The evaluation considered multiple adversarial settings, including sign-flip, Gaussian-noise, scaling, and label-flip attacks, as well as communication-dropout probabilities up to 50%. In contrast with the initial FedAvg-only evaluation, the revised experimental analysis includes comparisons with representative robust aggregation baselines, namely Median, Trimmed Mean, Krum, Multi-Krum, and an auxiliary Bulyan configuration. The experimental results demonstrate that the proposed Trust-FedAvg framework substantially improves robustness over conventional FedAvg and remains competitive with established robust aggregation strategies, particularly under directional model-manipulation attacks and intermittent-connectivity conditions. Under a 20% sign-flip attack on UCI HAR, the proposed method achieved a final test accuracy of 86.2%, whereas conventional FedAvg degraded to approximately 44.7%. Furthermore, under combined adversarial and intermittent-connectivity conditions with 50% communication dropout, Trust-FedAvg maintained a final accuracy of 57.0%, compared with 21.3% for FedAvg, 24.8% for Median, and 14.6% for Trimmed Mean. The additional experiments also show that Trust-FedAvg is not universally superior across all perturbation types: under severe Gaussian-noise attacks, coordinate-wise Median and Multi-Krum provided stronger robustness in some settings. Overall, the results suggest that trust-aware aggregation can improve robustness against unreliable or malicious simulated clients while preserving a relatively simple aggregation procedure. Runtime measurements further indicate that the proposed method introduces only limited round-level overhead compared with FedAvg, while remaining simpler than more complex Byzantine-resilient alternatives. Further validation with real IoT deployments, additional sensor datasets, asynchronous communication models, energy profiling, and communication-overhead measurements is required to fully assess deployment feasibility in real IoT environments. The proposed framework provides a practical, extensible basis for the design and evaluation of resilient AI-enabled IoT networks operating under controlled but practically relevant edge-learning constraints.

2026

Virtual production education in film curricula: Scope, methods, and pedagogies - A systematic multivocal review

Autores
Silveira, RA; Mamede, HS; Santos, A;

Publicação
CONVERGENCE-THE INTERNATIONAL JOURNAL OF RESEARCH INTO NEW MEDIA TECHNOLOGIES

Abstract
Virtual production (VP) is becoming central to film and television education, with universities offering degree programs, minors, tracks, electives, and short-term credentials. This review of 115 English-language sources, including 55 curricula from 49 higher education institutions (HEI), shows VP as a socially uneven, tool-weighted formation clustered in well-resourced Anglophone systems. Curricula overwhelmingly foreground real-time workflows, engine-driven pipelines, and stage operations over story development, audio design, and game-adjacent or interactive practices. The core tools include the Unreal Engine, motion-capture systems, and LED volumes, framed as prestige infrastructure rather than collective capacity. Programs emphasize employability, production-style blocks, and 'learning by doing real jobs', supporting industry transition but compressing experimentation, critique, and cross-cultural perspectives. Competency stacks map robust technical cores but reveal structural gaps in leadership, narrative, sound, and AI/ML literacy. The findings argue that evaluating VP education requires analyzing how programmes distribute technological and symbolic capital, organize human-machine networks, and produce learning spaces. Future research should model VP curricula as sociotechnical networks, measure AI integration maturity, test transferability, track longitudinal outcomes, map non-English ecosystems, and formalize stage pedagogy frameworks.

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