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  • New
  • Open Access Icon
  • Research Article
  • 10.3390/computers15050294
A Self-Adaptive LLM-Based Framework for Automated Extraction and Structuring of Earthquake Information from Heterogeneous Web Sources
  • May 5, 2026
  • Computers
  • Assem Turarbek + 3 more

The rapid growth of heterogeneous web sources has created significant challenges for the automated extraction and structuring of critical domain-specific information, particularly in real-time seismic monitoring scenarios. Despite the existence of official governmental reporting systems, relevant earthquake-related data are often distributed across diverse online platforms with highly variable and dynamically evolving HTML (HyperText Markup Language) structures, leading to incomplete, delayed, or inconsistent information retrieval. Existing rule-based and semi-automated approaches lack scalability and robustness under such conditions. To address this gap, this study proposes a self-adaptive framework based on large language models (LLMs) for the automated extraction and structuring of earthquake-related web content. The proposed approach integrates transformer-based schema generation, repository-guided schema matching, and an iterative refinement mechanism, enabling the system to dynamically adapt to heterogeneous document structures. A formal utility-based decision mechanism is introduced to optimize schema selection and reuse, while embedding-based similarity modeling facilitates efficient transfer of extraction patterns across structurally related webpages. The experimental evaluation was conducted on a heterogeneous benchmark dataset comprising multiple web domains with diverse structural characteristics. The results demonstrate that the proposed framework achieves a success rate of 85% across all evaluated models, with the best-performing configuration reaching an extraction accuracy of 96.5% and a final composite score of 84.26. Additional analysis reveals significant improvements in extraction completeness, reduction in false positives and false negatives, and effective reuse of a compact set of robust schemas. Error analysis indicates that the primary challenges are associated with noisy HTML structures and incorrect DOM (Document Object Model) element selection, rather than deficiencies in textual content. The findings confirm that combining lightweight transformer models with adaptive memory and schema reuse mechanisms enables the development of scalable, robust, and high-performance web extraction systems. The proposed approach is particularly suitable for real-time information retrieval in safety-critical domains, where timely and accurate data aggregation from heterogeneous sources is essential.

  • New
  • Open Access Icon
  • Research Article
  • 10.3390/computers15050292
A Language for Modeling Declarative Knowledge Bases in the Context of Model-Driven Engineering
  • May 4, 2026
  • Computers
  • Aleksandr Yurin + 1 more

End-user development (EUD) and model-driven engineering (MDE) are particularly valuable for building classical intelligent systems that rely on declarative knowledge bases. In these knowledge bases, the key dependencies of the domain can be described in the form of logical rules. The general-purpose modeling language used in MDE, specifically UML, enables modeling of static data structures and the dynamics of object behavior; however, it does not primarily support the modeling logical rules. In this paper, we propose a rule visual modeling language inspired by UML—Rule Visual Modeling Language (RVML)—which expands the capabilities of MDE in terms of using domain-specific visual languages. This approach substantially supports end-users in constructing declarative knowledge bases. We present the formal semantics, visual syntax, and features of RVML, along with two industrial case studies. We empirically evaluate the effectiveness of RVML in development compared to other graphic notations used for modeling logical rules. Our evaluation demonstrates that RVML provides superior expressiveness and better preservation of semantic integrity.

  • New
  • Open Access Icon
  • Research Article
  • 10.3390/computers15050270
R-Snort: A Performance-Optimized Multi-Agent NIDS Architecture for SOHO and Edge-of-Things Networks Using Snort 3 on Raspberry Pi 5
  • Apr 24, 2026
  • Computers
  • Julio Gómez López + 3 more

Network Intrusion Detection Systems (NIDSs) are critical to ensuring the resilience of modern digital infrastructures. Although traditionally deployed in large-scale corporate environments, the expanding threat landscape requires the integration of robust security measures into Small Office/Home Office (SOHO) and Edge-of-Things (EoT) networks. However, these environments often face significant constraints in terms of specialized hardware and technical expertise. This article presents R-Snort, an open-source NIDS based on Snort 3, optimized for low-cost Raspberry Pi 5 hardware. Its multi-agent architecture enables distributed deployment with centralized traffic analysis and cross-agent attack correlation, while an intuitive web interface simplifies alert visualization and system management for non-expert administrators. Its main contributions are: (1) a performance-optimized NIDS agent achieving 1 Gbps throughput; (2) a distributed multi-agent architecture enabling centralized event correlation and detection of multi-vector attacks; and (3) an IaC-based automated deployment framework with an intuitive web interface, democratizing professional-grade security for SOHO and EoT environments.

  • New
  • Open Access Icon
  • Research Article
  • 10.3390/computers15050274
Case Studies on the Logical Structure of the Algorithms Tabu Search and Threshold Accepting for Generating Solutions in Searching and Solving the Bin-Packing Problem
  • Apr 24, 2026
  • Computers
  • Vanesa Landero-Nájera + 6 more

The logical structure of approximation algorithms has been identified by the scientific community in four principal parts: tuning parameters, generating initial solutions, generating neighbor solutions, and stopping algorithm execution. A review of the literature specifically for the algorithms Threshold Accepting (TA) and Tabu Search (TS) indicates that, in most cases, choices are performed on one or several of these logical parts, often implicitly guided by expert knowledge for improving algorithm performance. However, these design choices, particularly in the selection of initialization and neighborhood strategies, are rarely analyzed in a systematic and reproducible manner. A formal experimental framework is presented to systematically analyze logical structure design choices, which are typically based on empirical expertise, by isolating and evaluating the combined effects of methodologies in the logical parts of initialization and neighborhood under controlled conditions of TA and TS algorithms in solving the one-dimensional Bin Packing Problem (BPP). A total of 324 benchmark instances were used to assess multiple algorithmic variants. Performance was evaluated in terms of solution quality and computational effort, supported by graphical analysis and statistical methods, including Wilcoxon signed-rank tests, effect size measures, bootstrap-based confidence intervals, and linear regression. The experimental results consistently show that the simpler internal logical structure of TA and TS algorithms, specifically with a probability-guided initialization combined with a single neighborhood operator, can achieve a better balance between solution quality and computational effort compared to more complex alternatives in general instances of BPP.

  • New
  • Open Access Icon
  • Research Article
  • 10.3390/computers15050272
VIRTUOSO: A Multilayer Cloud Security and Risk Management Framework
  • Apr 24, 2026
  • Computers
  • Raja Waseem Anwar + 2 more

Despite its continued growth, cloud computing remains susceptible to significant security challenges, as shared virtualised environments pose threats at multiple levels. These vulnerabilities are caused by a lack of security coverage in the responsibility model between the provider and the tenant. In this work, we propose the multi-layered architecture VIRTUOSO (VIRTual Unified Operation Security Optimiser) to cover these security gaps through advanced automation and ML. VIRTUOSO has four layers. The Input Layer extracts key risk components from collected telemetry data. The Deep Automation Security Layer provides automated actions and continuous monitoring of security defences. Its counterpart, the Intelligent Security Layer, predicts threats using anomaly detection. The last layer, the Output Layer, returns an aggregated risk summary. The datasets we used were chosen for their relevance: the UNSW-NB15 dataset, a subset of the web-attack classification from CSE-CIC-IDS2018, and a sample of anonymised log events from AWS CloudTrail. Our ensemble classifiers achieve a best accuracy of 95.08% ± 0.13% on UNSW-NB15 (RF), with statistically significant differences among models confirmed by the Friedman test (p < 0.004) and Nemenyi post hoc analysis, and 99.25% ± 0.52% on web-attack (CatBoost), where ensemble differences are not statistically significant (p = 0.093), consistent with the high separability of this dataset. The training-test gap and DNN curves show no overfitting, whereas our adversarial tests show a maximum accuracy loss of 8.1% at ε = 0.02. With these promising results, we can assert that, pending verification in an actual cloud environment and potential integration with FL, our ensemble classifier model appears to be a good real-world prototype.

  • New
  • Open Access Icon
  • Research Article
  • 10.3390/computers15050273
A GNN-Based Log Anomaly Detection Framework with Prompt Learning for Edge Computing
  • Apr 24, 2026
  • Computers
  • Xianlang Hu + 4 more

System logs have been critical for analyzing the operational status and abnormal behavior of highly distributed and heterogeneous edge computing nodes. In edge environments, logs exhibit cross-event and cross-field structural interactions, making it difficult to uncover potential anomaly patterns from isolated events. Moreover, sparse annotations and varying log formats limit the effectiveness of existing methods. To address these challenges, we propose a graph neural network (GNN) anomaly detection framework with prompt learning. It leverages few-shot prompt learning to automatically extract key fields and constructs a weighted directed graph that jointly models semantic embeddings and temporal dependencies, fully representing the structural interactions and semantic associations across events and fields. Furthermore, the framework performs graph-level anomaly detection by jointly optimizing graph representation learning and classification objective within an enhanced one-class directed graph convolutional network, enabling effective identification of global structural anomaly patterns in log graphs. Experimental results demonstrate that the proposed method achieves an average F1-score of 93.3%, surpassing the current state-of-the-art (SOTA) methods by 6.93%.

  • New
  • Open Access Icon
  • Research Article
  • 10.3390/computers15050275
The Missing Layer in Modern IT: Governance of Commitments, Not Just Compute and Data
  • Apr 24, 2026
  • Computers
  • Rao Mikkilineni + 1 more

Contemporary enterprise IT operations are largely implemented on Shannon–Turing computing models in which programs execute read–compute–write cycles over data structures, while governance—fault handling, configuration control, auditability, continuity, and accounting—is applied externally through infrastructure platforms, observability stacks, and human operational processes. This separation scales analytical throughput but accumulates what we term coherence debt: locally expedient operational commitments whose provenance and revisability degrade over time until exposed by failures, security incidents, regulatory demands, or architectural transitions. This paper examines the evolution of operational computing models that integrate com-pupation with regulation at two distinct levels. First, Distributed Intelligent Managed Elements (DIME) extend the classical Turing cycle toward a supervised execution loop—read–check-with-oracle–compute–write—by incorporating signaling overlays and FCAPS (Fault, Configuration, Accounting, Performance, and Security) supervision into computation in progress. Second, the Autopoietic Management and Orchestration System (AMOS), grounded in the General Theory of Information, the Burgin–Mikkilineni Thesis, and Deutsch’s epistemic framework, fully decouples process executors from governance by treating any Turing-equivalent engine as a replaceable execution substrate while elevating knowledge structures—encoded as local and global Digital Genomes—to first-class operational state within a governed knowledge network. Using a distributed microservice transaction testbed, we demonstrate how this approach operationalizes topology-as-data, a capability-oriented control plane, decoupled application-layer FCAPS independent of infrastructure management, and policy-selectable consistency/availability semantics. Our results show that the principal benefit of AMOS is not circumventing theoretical constraints such as the Consistency, Availability, and Partition tolerance (CAP) theorem, but governing their trade-offs as explicit, auditable commitments with defined convergence pathways and controlled return to a coherent system state, thereby reducing coherence debt and improving operational reliability in distributed AI-enabled enterprise systems.

  • New
  • Open Access Icon
  • Research Article
  • 10.3390/computers15050271
A Multi-Stage YOLOv11-Based Deep Learning Framework for Robust Instance Segmentation and Material Quantification of Mixed Plastic Waste
  • Apr 24, 2026
  • Computers
  • Andrew N Shafik + 3 more

Instance segmentation in heterogeneous waste scenes remains challenging due to object variability, deformable shapes, partial occlusion, and large appearance differences across packaging types. This study presents a YOLOv11-based deep learning framework for mixed plastic waste instance segmentation, developed to connect visual perception with reliable material quantification. The framework integrates curated instance-level annotations, strict split isolation, multi-stage optimization, training strategy ablation, and seed-robustness analysis to support reproducible model selection. Experimental results on a held-out test set show that the optimized model achieves a mask mAP@50:95 of 0.9337, indicating strong segmentation performance under heterogeneous waste-scene conditions. To extend the analysis beyond standard vision metrics, the framework incorporates a physics-informed mask-to-mass module that converts predicted masks into class-specific mass estimates using geometric calibration and material priors. Applied to a representative stream of 1253 detected objects, the system estimated a total plastic mass of 15.48 ± 1.08 kg, corresponding to a theoretical H2 potential of 0.41 ± 0.04 kg and a greenhouse-gas avoidance of 34.57 ± 4.15 kg CO2e. Overall, the proposed framework extends waste-scene understanding beyond vision-level assessment toward physically grounded, data-driven decision support for smart material recovery systems.

  • New
  • Open Access Icon
  • Research Article
  • 10.3390/computers15050264
Biometric Embedded Non-Blind Color Image Watermarking with Geometric Tamper Resistance via SIFT-ORB Keypoint Matching
  • Apr 22, 2026
  • Computers
  • Swapnaneel Dhar + 3 more

This work introduces a non-blind watermarking framework for color images to address tamper detection, particularly under geometric transformations. The proposed scheme fuses two watermarks, a personal signature and a biometric fingerprint, into a unified composite watermark embedded into the chrominance component of the cover image using a multi-level transform domain approach, discrete wavelet transforms (DWTs), discrete cosine transforms (DCTs), and singular value decomposition (SVD). By leveraging the rotation-invariant properties of scale-invariant feature transform (SIFT) and oriented FAST and rotated BRIEF (ORB) descriptors, the framework ensures robust tamper detection without requiring alignment, thus mitigating the limitations of conventional detection techniques vulnerable to transformation-induced tamper obfuscation (TITO). Extensive experimentation demonstrates that the method maintains high perceptual fidelity, achieving PSNR values ranging from 50 to 55 dB for embedding strength factor μ (0.01–0.04) and SSIM indices near 1 across multiple benchmark images. Furthermore, the scheme exhibits notable resilience to a range of image processing attacks and geometric distortion. Comparative evaluation reveals its superiority over existing grayscale, color, SIFT-based and DWT-DCT-SVD-based watermarking techniques, affirming its applicability in scenarios demanding secure, imperceptible, and transformation-invariant image watermarking.

  • New
  • Open Access Icon
  • Research Article
  • 10.3390/computers15050261
DaN: A Comprehensive Semi-Real Dataset for Extreme Low-Light Image Enhancement
  • Apr 22, 2026
  • Computers
  • Qiuyang Sun + 6 more

Extreme low-light image enhancement (ELLIE) targets the restoration of visual quality under ultra-dim environments (<0.1 lux). Conventional image signal processing (ISP) pipelines often fail in such scenarios due to the limitations of heuristic, hand-crafted algorithms. While deep learning has advanced the field via end-to-end mapping, existing models suffer from constrained generalization and suboptimal perceptual fidelity, primarily stemming from the scarcity of large-scale, high-diversity datasets. To bridge this gap, we present the Day and Night (DaN) dataset, a semi-synthetic benchmark synthesized through a rigorous physics-based noise model. This approach effectively captures authentic noise characteristics while enabling the scalable generation of paired samples across multifaceted illumination conditions and scenes. Furthermore, we propose No Longer Vigil (NLV), a fully differentiable AI-ISP framework. By replacing traditional rigid blocks with adaptive non-linear networks, NLV facilitates scene-dependent transformations without requiring manual priors. Comprehensive evaluations demonstrate that our method significantly outshines state-of-the-art approaches, yielding a 4.15 dB gain in PSNR and a 0.026 improvement in SSIM.