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Research Article
Hybrid CNN-Transformer Model for Early Detection and Diagnosis of Breast Cancer: A Multi-Regional Dataset Study with Implications for African Healthcare Settings
Issue:
Volume 10, Issue 1, June 2026
Pages:
1-13
Received:
9 November 2025
Accepted:
3 December 2025
Published:
29 December 2025
Abstract: Breast cancer remains the most common cancer among African women, contributing to high mortality largely due to late-stage diagnosis. More than 70% of cases in many African countries are detected at advanced stages, when treatment options are limited and survival rates are significantly reduced. Barriers such as limited access to screening, a shortage of radiologists, and socio-economic constraints further delay early detection. Artificial intelligence (AI)-based diagnostic tools offer an opportunity to strengthen screening systems and improve timely diagnosis; however, the lack of publicly available African mammography datasets remains a major challenge. This study introduces MAMMOAI, an AI-driven framework designed to enhance early breast cancer detection with potential applicability to African contexts. Due to the scarcity of large-scale annotated African mammography datasets a critical barrier identified in current literature we adopted a pragmatic approach combining a multi-task deep learning model integrating convolutional neural networks (CNN) with Transformer layers to perform simultaneous risk assessment, cancer detection, staging, risk factor analysis, and differential diagnosis using mammograms. The model was trained using the King AbdulAziz University Breast Cancer Mammogram Dataset (KAU-BCMD) from Saudi Arabia, supplemented with preliminary data collected from Kenyan healthcare facilities. This multi-regional approach was necessitated by insufficient African data volume for robust deep learning model training. The framework employs a multi-task learning approach that integrates a ResNet50–Transformer backbone for spatial feature extraction, feeding five specialized branches for risk assessment, cancer detection, staging, risk factor analysis, and differential diagnosis. All images underwent standardized preprocessing, including resizing to 224×224 pixels, normalization, contrast enhancement, and extensive data augmentation. Weighted categorical cross-entropy losses supported joint optimization across tasks. Model interpretability was ensured using Grad-CAM–based heatmaps and uncertainty estimation, and predictions were compiled into automated, clinician-friendly HTML reports. The model achieved overall accuracy of 98% on the majority class (BI-RADS 1), with macro-averaged F1-scores of 0.61-0.62 across all branches, reflecting challenges in detecting minority classes. Critically, the model failed to identify any BI-RADS 5 (highly malignant) cases, misclassifying all as BI-RADS 4. Grad-CAM visualizations provided interpretable insights, supporting clinical decision-making. While these results demonstrate technical feasibility and the potential of hybrid architectures, they also underscore critical limitations: severe class imbalance, inadequate minority class performance, and unproven generalizability to diverse African populations. Future work must prioritize collection of larger, balanced, multi-center African datasets and external validation across diverse Sub-Saharan African healthcare settings before clinical deployment can be considered.
Abstract: Breast cancer remains the most common cancer among African women, contributing to high mortality largely due to late-stage diagnosis. More than 70% of cases in many African countries are detected at advanced stages, when treatment options are limited and survival rates are significantly reduced. Barriers such as limited access to screening, a short...
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Research Article
The Cekirge σ-Method in AI: Analysis and Broad Applications
Huseyin Murat Cekirge*
Issue:
Volume 10, Issue 1, June 2026
Pages:
14-33
Received:
19 December 2025
Accepted:
4 January 2026
Published:
19 January 2026
Abstract: Modern machine learning relies predominantly on iterative optimization, assuming that learning must progress by following gradients across a probabilistic loss landscape shaped by Gaussian noise. Such methods depend on learning rates, random initialization, batching strategies, and repeated parameter updates, and their outcomes vary with numerical precision, hardware behavior, and floating-point drift. As dimensionality increases or data matrices become ill-conditioned, these iterative procedures often require extensive tuning and may converge inconsistently or fail altogether. This work presents the Cekirge Global Deterministic σ-Method, a non-iterative learning framework in which model parameters are obtained through a single closed-form computation rather than through iterative descent. Learning is formulated as a deterministic equilibrium problem governed by a σ-regularized equilibrium functional. A behavioral analogy-Cekirge’s Dog-illustrates the operational distinction: a trained working dog runs directly to its target without scanning or correcting its path step by step, whereas iterative algorithms resemble a dog that repeatedly stops, senses, and adjusts direction. Throughout this work, the term equilibrium functional is used instead of energy, emphasizing deterministic balance rather than physical or variational interpretations. The proposed framework yields a unique, reproducible solution independent of initialization or hardware, remains stable for ill-conditioned systems, and scales deterministically to large problems through σ-regularized partitioning. A minimal overdetermined example demonstrates that the inefficiency of gradient-based learning is structural rather than dimensional, arising from trajectory-based optimization, while the proposed σ-regularized formulation computes the same equilibrium directly in a single closed-form step.
Abstract: Modern machine learning relies predominantly on iterative optimization, assuming that learning must progress by following gradients across a probabilistic loss landscape shaped by Gaussian noise. Such methods depend on learning rates, random initialization, batching strategies, and repeated parameter updates, and their outcomes vary with numerical ...
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Review Article
Thermal Management Optimization for Robotic Surgical Systems in Clinical Applications in Mongolia
Issue:
Volume 10, Issue 1, June 2026
Pages:
34-41
Received:
26 November 2025
Accepted:
31 December 2025
Published:
23 January 2026
DOI:
10.11648/j.ajai.20261001.13
Downloads:
Views:
Abstract: In the clinical application of robotic surgical systems, optimizing thermal management is crucial for improving surgical efficiency and ensuring system reliability. The rapid development of flexible robotics has introduced enhanced flexibility and adaptability in surgical procedures, opening new clinical possibilities while simultaneously imposing more stringent thermal management requirements. Furthermore, thermal management in implantable medical devices has become increasingly critical, demanding advanced optimization strategies to guarantee both safety and operational stability. This study conducted a systematic review and analysis of research indexed in major databases, including Web of Science (WoS), Scopus, and CNKI. The investigation focused on three key areas: (1) thermal management optimization in robotic surgical systems, (2) the design and clinical applications of flexible robotic technologies, and (3) thermal management strategies for implantable devices. By synthesizing findings from these domains, the study aimed to identify effective approaches to enhance thermal performance in surgical robotics. Thermal Management: Increasing heat dissipation surface area and optimizing thermal conduction pathways-such as using copper or aluminum materials under cryogenic conditions-significantly improved cooling efficiency. However, while iron/nickel-based alloys and ceramics demonstrated superior thermal stability in high-temperature environments, challenges related to corrosion resistance and long-term durability remained unresolved. Flexible Robotics: Magnetic actuation and smart material-based actuators enhanced reconfigurability, enabling more adaptable surgical interventions. Additionally, probability model-based online learning algorithms facilitated control optimization independent of specific robotic designs. Thermal Performance: Finite-state machine control combined with proportional-integral (PI) strategies effectively minimized temperature gradients to below 0.5°C. Liquid cooling systems proved highly efficient in battery thermal management, though integration complexities and control challenges persisted. The integration of multidisciplinary approaches-spanning materials science, thermodynamic modeling, and intelligent control-has significantly advanced thermal management in robotic surgical systems. Flexible robotics technologies offer safer and more precise surgical solutions, while thermal management strategies for implantable devices can be rigorously validated through computational simulations and experimental studies. Future research should explore novel nanomaterials, dynamic thermal management algorithms, and cross-disciplinary collaborations to further optimize the performance and reliability of robotic surgical systems. These advancements will be pivotal in meeting the growing demands of next-generation surgical robotics and implantable medical technologies.
Abstract: In the clinical application of robotic surgical systems, optimizing thermal management is crucial for improving surgical efficiency and ensuring system reliability. The rapid development of flexible robotics has introduced enhanced flexibility and adaptability in surgical procedures, opening new clinical possibilities while simultaneously imposing ...
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Research Article
A Dual-Pathway AI Architecture for Tourism Logistics and Support in Low-Resource Environments
Aashish Dhakal*,
Bibek Ropakheti
Issue:
Volume 10, Issue 1, June 2026
Pages:
42-47
Received:
19 December 2025
Accepted:
4 January 2026
Published:
23 January 2026
DOI:
10.11648/j.ajai.20261001.14
Downloads:
Views:
Abstract: The tourism industry in high-altitude regions, specifically the Himalayas, faces two critical and distinct challenges: ensuring operational safety amidst volatile weather and traffic conditions, and overcoming commercial inefficiency caused by a lack of 24/7 customer support. Traditional solutions have largely failed to address these issues simultaneously, often relying on fragmented manual processes or static chatbots that lack real-time capabilities. This paper presents a unified Artificial Intelligence (AI) platform designed to address these distinct problems using a novel ”Hybrid AI” architecture. A ”Two-Brain” system is proposed that integrates Retrieval Augmented Generation (RAG) for static, knowledge-intensive customer queries and Tool-Using Large Language Model (LLM) Agents for dynamic, real-time logistical support. By leveraging open source technologies, specifically Django for the backend framework and PostgreSQL with pgvector for high-dimensional vector storage, and implementing semantic caching, a cost-effective, maintainable solution is demonstrated for Small and Medium Enterprises (SMEs) in developing economies. The design mitigates hallucination risks through strict context faithfulness protocols and ensures data sovereignty via a self-hosted infrastructure. Performance metrics regarding average latency, token cost efficiency, and data freshness are analyzed, showing that the dual-pathway approach significantly optimizes resource usage compared to traditional methods. Specifically, the semantic caching mechanism reduces API costs by approximately 60 percent for repetitive queries, while the real-time agent ensures critical safety data is retrieved with a freshness of under 10 seconds. This study concludes that such a hybrid architecture provides a scalable, safe, and economically viable model for modernizing tourism operations in low-resource environments.
Abstract: The tourism industry in high-altitude regions, specifically the Himalayas, faces two critical and distinct challenges: ensuring operational safety amidst volatile weather and traffic conditions, and overcoming commercial inefficiency caused by a lack of 24/7 customer support. Traditional solutions have largely failed to address these issues simulta...
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