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Big Data and Cognitive Computing, Volume 10, Issue 4

2026 April - 30 articles

Cover Story: This paper addresses the challenge of achieving strong privacy in federated smart-meter theft detection without sacrificing performance. While federated learning reduces the need for centralized data, existing differential privacy (DP) approaches rely on fixed sensitivity assumptions, leading to excessive noise and degraded utility. We propose an adaptive clipping-based Rényi Differential Privacy (RDP) accountant that incorporates empirical, round-wise update magnitudes into privacy estimation. By aligning privacy accounting with actual training dynamics, the method produces tighter privacy bounds and improves accuracy under both IID and non-IID settings. Extensive experiments demonstrate a superior privacy–utility trade-off across multiple FL algorithms, highlighting the practicality of sensitivity-aware DP for real-world smart-grid systems. View this paper
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Articles (30)

  • Review
  • Open Access
1 Citations
1,821 Views
28 Pages

Fuzz Driver Generation: A Survey and Outlook from the Perspective of Data Sources

  • Xiao Feng,
  • Shuaibing Lu,
  • Taotao Gu,
  • Yuanping Nie and ,
  • Qian Yan,
  • Mucheng Yang,
  • Jinyang Chen and
  • Xiaohui Kuang
  • + 3 authors+ 0 author

Fuzzing is an essential element of software supply chain security governance. Despite its importance, the widespread adoption of library fuzzing is limited by the significant costs associated with constructing fuzz drivers. Without a clear entry poin...

(This article belongs to the Special Issue Machine Learning Methodologies and Applications in Cybersecurity Data Analysis)
  • Article
  • Open Access
1,455 Views
22 Pages

A Reservoir Computing Approach for Synchronizing Discrete-Time 3D Chaotic Systems

  • Vismaya V. S,
  • Swetha P,
  • Jubin K. Babu,
  • Diya Gijo and ,
  • Varada M. T,
  • Adithya K. K,
  • Ekaterina Kopets and
  • Sishu Shankar Muni
  • + 3 authors+ 0 author

Reservoir computing (RC) is an efficient framework for processing time-series data. This work investigates the synchronization of two independently trained reservoir computers that, after training, operate without external input from the chaotic syst...

  • Editorial
  • Open Access
2 Citations
3,112 Views
5 Pages

Generative AI and Large Language Models

  • Fabrizio Marozzo and
  • Riccardo Cantini

In recent years, generative artificial intelligence and, in particular, large language models (LLMs) have rapidly transformed the landscape of data analysis, knowledge extraction, content generation, and intelligent decision support [...]

(This article belongs to the Special Issue Generative AI and Large Language Models)
  • Article
  • Open Access
1,242 Views
21 Pages

Edge Node Deployment for Turbidity Estimation in Farm Ponds

  • Martin Moreno,
  • Iván Trejo-Zúñiga,
  • Víctor Alejandro González-Huitrón,
  • René Francisco Santana-Cruz and ,
  • Raúl García García and
  • Gabriela Pineda Chacón
  • + 1 author+ 0 author

Image-based AI offers a low-cost alternative to traditional turbidity sensors in farm ponds, yet the prevailing shift toward Vision Transformers (ViTs) critically overlooks two field realities: the chronic scarcity of annotated data (Small Data) and...

  • Article
  • Open Access
4 Citations
1,302 Views
16 Pages

LST-AGCN: A Novel Unified Lightweight Attention Framework for Efficient Skeleton-Based Action Recognition

  • Khadija Lasri,
  • Khalid El Fazazy,
  • Adnane Mohamed Mahraz,
  • Hamid Tairi and
  • Jamal Riffi

While Graph Convolutional Networks (GCNs) have revolutionized skeleton-based action recognition, existing methods face a critical efficiency–accuracy dilemma: state-of-the-art approaches achieve high performance through computationally expensiv...

(This article belongs to the Section Artificial Intelligence and Multi-Agent Systems)
  • Article
  • Open Access
4,921 Views
30 Pages

Understanding the Global Trends of 2025 Through the Defly Compass Methodology

  • Mabel López Bordao,
  • Antonia Ferrer Sapena,
  • Carlos A. Reyes Pérez and
  • Enrique A. Sánchez Pérez

This study aims to identify and synthesize the major global trends that shaped 2025 by applying the DeflyCompass methodology to a curated corpus of strategic foresight reports. The study synthesizes insights from 23 strategic reports published by lea...

  • Article
  • Open Access
1,940 Views
29 Pages

Enhancing Collaborative AI Learning: A Blockchain-Secured, Edge-Enabled Platform for Multimodal Education in IIoT Environments

  • Ahsan Rafiq,
  • Eduard Melnik,
  • Alexey Samoylov,
  • Alexander Kozlovskiy and
  • Irina Safronenkova

As industries deploy more connected devices in factories, warehouses, and smart facilities, the need for artificial intelligence (AI) systems that can operate securely in distributed, data-intensive environments is growing. Traditional centralized le...

  • Article
  • Open Access
1,432 Views
32 Pages

Analyzing music similarity in large catalogs is challenging because people perceive music differently and important details are found in audio, text, and metadata. This article introduces a multimodal framework that uses an ontology to make music sim...

(This article belongs to the Section Cognitive System)
  • Article
  • Open Access
2 Citations
1,746 Views
33 Pages

Communicating the design and results of agent-based models (ABMs) to subject matter experts is challenging, which hinders participation and limits trust in simulation-based decision support. Large language models (LLMs) can communicate ABMs as textua...

(This article belongs to the Section Large Language Models and Embodied Intelligence)
  • Article
  • Open Access
1 Citations
1,968 Views
18 Pages

In the era of Large Language Models (LLMs), Retrieval-Augmented Generation (RAG) architectures are gaining significant attention for their ability to ground language generation in reliable knowledge sources. Despite their effectiveness, RAG systems b...

(This article belongs to the Section Large Language Models and Embodied Intelligence)
  • Article
  • Open Access
1 Citations
1,508 Views
25 Pages

Handball performance analysis is still often conducted through the manual review of match videos, while automation on broadcast footage remains challenging due to camera motion, strong perspective effects, and frequent occlusions during dense interac...

(This article belongs to the Special Issue AI and Data Science in Sports Analytics)
  • Article
  • Open Access
1 Citations
1,151 Views
33 Pages

FMT-SVM: A Communication-Efficient Federated Multi-Task Support Vector Machine Framework for Healthcare

  • Naima Firdaus,
  • Sachin Balkrushna Jadhav,
  • Zahid Raza,
  • Maria Lapina and
  • Mikhail Babenko

Federated learning has become a promising paradigm in the training of decentralized machine learning models across clients without sharing raw data, thereby preserving privacy. Current federated support vector machine methods are mainly based on the...

(This article belongs to the Topic New Trends in Cybersecurity and Data Privacy)
  • Article
  • Open Access
1 Citations
1,482 Views
18 Pages

Understanding and Predicting Tourist Behavior Through Large Language Models

  • Anna Dalla Vecchia,
  • Simone Mattioli,
  • Sara Migliorini and
  • Elisa Quintarelli

Understanding and predicting how tourists move through a city is a challenging task, as it involves a complex interplay of spatial, temporal, and social factors. Traditional recommender systems often rely on structured data, trying to capture the nat...

(This article belongs to the Section Large Language Models and Embodied Intelligence)
  • Article
  • Open Access
1,412 Views
29 Pages

Experimental Validation and Reservoir Computing Capability of Spiking Neuron Based on Threshold Selector and Tunnel Diode

  • Vasiliy Pchelko,
  • Vladislav Kholkin,
  • Vyacheslav Rybin,
  • Alexander Mikhailov and
  • Timur Karimov

Despite the success of artificial neural networks in solving numerous tasks, they face significant challenges, including difficulties in online adaptation and rapidly increasing energy consumption. As a biologically plausible alternative, spiking neu...

  • Article
  • Open Access
4 Citations
1,418 Views
29 Pages

Non-Invasive Sleep Stage Classification with Imbalance-Aware Machine Learning for Healthcare Monitoring

  • Luisiana Sabbatini,
  • Alberto Belli,
  • Sara Bruschi,
  • Marco Esposito and ,
  • Sara Raggiunto and
  • Paola Pierleoni
  • + 1 author+ 0 author

Sleep plays a fundamental role in human health and cognitive functioning, motivating the development of reliable and scalable methodologies for sleep stage classification (SSC). Recent advances in non-invasive and economically sustainable sensing tec...

  • Article
  • Open Access
1,127 Views
31 Pages

Patients leave millions of medical reviews annually, providing critical data for quality management. However, manual processing is infeasible, and existing systems fail to distinguish medical from organizational problems—a distinction essential...

(This article belongs to the Special Issue Artificial Intelligence and Big Data Analytics for Sustainable Healthcare Systems)
  • Article
  • Open Access
2 Citations
1,166 Views
32 Pages

Smart-meter theft detection requires learning from fine-grained electricity consumption data, whose centralized processing poses significant privacy risks. Federated learning (FL) mitigates these risks by decentralizing training, but providing rigoro...

  • Article
  • Open Access
1 Citations
1,002 Views
30 Pages

Interpretable Optimized Extreme Gradient Boosting for Prediction of Higher Heating Value from Elemental Composition of Coal Resource to Energy Conversion

  • Paulino José García-Nieto,
  • Esperanza García-Gonzalo,
  • José Pablo Paredes-Sánchez and
  • Luis Alfonso Menéndez-García

The higher heating value (HHV), sometimes referred to as the gross calorific value, is a crucial metric for determining a fuel’s primary energy potential in energy production systems. By combining extreme gradient boosting (XGBoost) with the di...

(This article belongs to the Special Issue Smart Manufacturing in the AI Era)
  • Article
  • Open Access
1 Citations
1,184 Views
27 Pages

A Comparative Study of Federated Learning and Amino Acid Encoding with IoT Malware Detection as a Case Study

  • Thaer AL Ibaisi,
  • Stefan Kuhn,
  • Muhammad Kazim,
  • Ismail Kara and ,
  • Turgay Altindag and
  • Mujeeb Ur Rehman
  • + 1 author+ 0 author

The increasing deployment of Internet of Things (IoT) devices introduces significant security challenges, while privacy concerns limit centralized data aggregation for intrusion detection. Federated learning (FL) offers a decentralized alternative, y...

(This article belongs to the Special Issue Application of Cloud Computing in Industrial Internet of Things)
  • Article
  • Open Access
3 Citations
3,033 Views
37 Pages

Enterprise decision making in marketing, finance, and audit remains fragmented, leading to inefficient budget allocation and incomplete risk assessment. This study proposes an integrated, Big Data-driven decision-support framework that unifies Large...

(This article belongs to the Section Large Language Models and Embodied Intelligence)
  • Article
  • Open Access
7,121 Views
24 Pages

Stock Market Forecasting in Taiwan: A Radius Neighbors Regressor Approach

  • Yu-Kai Huang,
  • Chih-Hung Chen,
  • Yun-Cheng Tsai and
  • Shun-Shii Lin

This study proposes a machine learning framework tailored to the institutional characteristics of Taiwan’s stock market, aiming to enhance forecasting accuracy for the Taiwan Stock Exchange Capitalization Weighted Stock Index (TAIEX). The model...

  • Article
  • Open Access
2,320 Views
16 Pages

The rapid development of Generative Artificial Intelligence (GenAI) in graduate education has changed human–AI interaction within knowledge-intensive environments, leading to important questions about user-side cognitive adaptation in probabili...

  • Article
  • Open Access
2,455 Views
13 Pages

Candidate interview assessment is primarily reliant on subjective human judgment, while existing AI-based methods rely on end-to-end predictions with no psychometric basis. In this paper, we propose an interpretable multi-modal framework that combine...

  • Article
  • Open Access
1,334 Views
18 Pages

Exemplar-based image translation generates an output image by transferring appearance from a reference exemplar to a content image. Existing works only consider the local correspondences between two modalities, and ignore the global distributions in...

(This article belongs to the Special Issue Perspectives and Applications of Multimodal Artificial Intelligence and Big Data)
  • Article
  • Open Access
1 Citations
1,457 Views
13 Pages

Reconstructing photorealistic and animatable whole-body avatars from monocular videos is a hot topic in computer vision and computer graphics. However, existing methods still face challenges due to the limited frequency response of single-scale geome...

(This article belongs to the Special Issue Application of Pattern Recognition and Machine Learning)
  • Article
  • Open Access
2,178 Views
15 Pages

Enhanced Schema Linking with Large Language Models via Self-Verification and Value Hints

  • Linfei Ma,
  • Dexing Wei,
  • Xiangpeng Li,
  • Feng Wen and
  • Haisu Zhang

Schema linking, the task of identifying relevant database schema elements (tables and columns) for natural language queries, is a critical component in database-driven natural language interfaces. While existing approaches rely on question decomposit...

  • Article
  • Open Access
1 Citations
1,967 Views
35 Pages

Complex products and production processes are intertwined and demand expressive, lifecycle-wide digital representations. The Asset Administration Shell emerged as a standard for Digital Twins (DTs), structuring heterogeneous data across cloud-based I...

(This article belongs to the Special Issue Application of Cloud Computing in Industrial Internet of Things—2nd Edition)
  • Article
  • Open Access
1 Citations
4,586 Views
28 Pages

Large Language Models (LLMs) demonstrate remarkable performance across a variety of natural language understanding tasks, yet their sensitivity to emotional framing in user prompts remains underexplored. This paper presents an empirical study investi...

(This article belongs to the Section Large Language Models and Embodied Intelligence)
  • Article
  • Open Access
1,356 Views
15 Pages

Atopic dermatitis (AD) is a chronic inflammatory skin disorder that is significantly contributed to by epigenetics. We developed a machine learning-based framework to identify DNA methylation biomarkers associated with AD classification and severity....

(This article belongs to the Special Issue Beyond Diagnosis: Machine Learning in Prognosis, Prevention, Healthcare, Neurosciences, and Precision Medicine)
  • Article
  • Open Access
1,601 Views
32 Pages

An Experimental Study on Harassment Moderation in Llama and Alpaca

  • Henrique Tostes de Sousa and
  • Leo Natan Paschoal

The growing integration of chatbots and large language models (LLMs) into society raises important concerns about their potential to reproduce toxic human behaviors. As a result, it is essential to investigate these models to mitigate or eliminate su...

(This article belongs to the Special Issue Artificial Intelligence in Digital Humanities)
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Big Data Cogn. Comput. - ISSN 2504-2289