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29,922 Article Results

Alzheimer’s disease stage prediction using a novel transfer learning-Alzheimer’s network architecture

10.11591/ijeecs.v40.i1.pp518-529
Pothala Ramya , Chappa Ramesh , Odugu Srinivasa Rao
The root cause of Alzheimer’s disease (AD) is unknown except for a very tiny number of family instances caused by a genetic mutation. A thorough examination of particular brain disorders’ tissues is necessary to correctly identify the circumstances using scans of magnetic resonance imaging (MRI), and specific non-brain tissues, like the neck, skin, muscle, and fat, make further investigation challenging and can be seen in MRI scans. This work aims to use the FSL-BET skull stripping tool to remove non-brain tissues and extract the significant region of the brain- deep learning (DL) techniques rather than machine learning (ML) models helpful in classification and predictions. The most frequent issue with DL models is which needs a lot of training data, causes to problems with class imbalance. To avoid imbalance issues, we used data augmentation to ensure that the samples were distributed equally among the classes. A novel transfer learning Alzheimer’s disease network (TL-AzNet) based visual geometry group-19 (VGG19) technique was developed in this study. Conducted a comparison study using the base and suggested models, comparing over data with oversampling versus non-oversampling. The novel model predicted AD with a 95% accuracy rate.
Volume: 40
Issue: 1
Page: 518-529
Publish at: 2025-10-01

DDoS attack detection using optimal scrutiny boosted graph convolutional and bidirectional long short-term memory

10.12928/telkomnika.v23i5.27046
Huda Mohammed; Urmia University Ibadi , Asghar Asgharian; Urmia University Sardroud
The distributed denial of service (DDoS) attack occurs when massive traffic from numerous computers is directed to a server or network, causing crashes and disrupting functionality. Such attacks often shut down websites or applications temporarily and remain among the most critical cybersecurity challenges. Detecting DDoS is difficult and must occur before mitigation. Recently, machine learning and deep learning (ML/DL) have been employed for detection; however, architectural limitations restrict their effectiveness against evolving attack methods. This paper presents a novel framework, scrutiny boosted graph convolutional–bidirectional long short-term memory and vision transformer (SBGC-BiLSTM-ViT), which integrates graph convolutional, BiLSTM, and ViT models with machine learning classifiers such as support vector machine (SVM), Naïve Bayes (NB), random forest (RF), and K-nearest neighbors (KNN). The integration enables autonomous extraction of critical features, enhancing precision in detecting and classifying DDoS attacks. To further boost performance, a Bayesian optimization algorithm (BOA) is applied for hyperparameter tuning of SBGC and ML methods. Evaluation on benchmark datasets UNSW-NB15 and CICDDoS2019 demonstrates that the proposed approach achieves higher accuracy and effectively identifies new DDoS variants, outperforming conventional methods.
Volume: 23
Issue: 5
Page: 1212-1227
Publish at: 2025-10-01

Lexicon-based comparison for suicide sentiment analysis on Twitter (X)

10.12928/telkomnika.v23i5.25711
Munawar; Esa Unggul University Munawar , Dwi; Universitas Esa Unggul Sartika , Fathinatul; Esa Unggul University Husnah
Suicidal individuals frequently share their desires on social media. As a result, it was determined that a learning machine for early detection of suicide issues on social media was required. This study aims to examine Twitter (X) users’ suicide-related sentiment expressions. The results of searching X for the keywords ‘suicide’, ‘wish to die’, and ‘want to commit suicide’ for 4 months yielded 5,535 tweets. Following the cleaning process, 2,425 tweets were collected. The findings of labeling with the lexicon-based valence aware dictionary and sentiment reasoner (VADER) and Indonesia sentiment (INSET) lexicon, which psychologists confirmed, revealed that VADER was more accurate (92.1%) than INSET (81.6%). Sentiment research reveals negative (86.4%), positive (11.1%), and neutral (2.5%) sentiment. Support vector machine (SVM), K-nearest neighbor (KNN), and Naïve Bayes modeling results show accuracy above 86%, with SVM having the best accuracy (87.65%). Because of its great accuracy, this model can be used to identify and analyze suspicious behavior relating to suicide on X. Further research is still required, despite the excellent identification of early indicators of suicide ideation from social media posts.
Volume: 23
Issue: 5
Page: 1314-1322
Publish at: 2025-10-01

Advanced image processing techniques for intelligent building environments using pattern recognition

10.12928/telkomnika.v23i5.26800
Mohanad A.; University of Anbar Al Askari , Iehab Abdul Jabbar; University of Anbar Kamil
The use of smart building environments, along with high-technology image processing and pattern recognition, is discussed within this paper. The study shows that the Canny edge detection algorithm is better than the Sobel operator in the edge clarity, continuity and accuracy in segmenting those edges, posting 92.7% of edge detection accuracy. Incorporating fuzzy logic, the hybrid Hough transform, and sophisticated segmentation techniques, like adaptive simple linear iterative clustering (SLIC) superpixel division, the study advances line detection and feature identification in the images of buildings. The variational autoencoder (VAE) and principal component analysis (PCA) help optimise the feature extraction substantially by retaining more than 93% variance at a lower dimension. In addition, adaptive Otsu thresholding and region-growing segmentation allow improving the segmentation accuracy, resulting in a significant increase in building detection F1 score from 77.3% to 89.6%. Irrespective of the Hough transform issues like noise sensitivity and over-joining, the results suggest computing process ideas that are computationally effective, scalable, and applicable in smart building systems. This study suggests extending the current advancement of hybrid models and incorporating them with the urban planning procedures, energy control, and building security systems.
Volume: 23
Issue: 5
Page: 1258-1270
Publish at: 2025-10-01

An architecture to build high performance infrastructures on cloud computing for telecommunications organizations

10.12928/telkomnika.v23i5.26732
Omar Antonio Hernández; Technological University of Havana Duany , Caridad Anías; Technological University of Havana Calderón , Roberto Sepúlveda; Technological University of Havana Lima , Fernando de la Nuez; Technological University of Havana García , Cornelio; Instituto Politécnico Nacional Yáñez-Márquez
Nowadays, many small and medium organizations of the telecommunication sector must solve intrinsic heterogeneous problems in their own environments that have been associated with high computational complexities of their algorithms. These class of problems require to use high performance computing (HPC) infrastructures for their executions. Therefore, these must be accelerated to reduce significantly the execution times, included many problems that should be solved in real time: like the processing of multiples video streams, the pattern recognition in big volumes of data, the traffic analysis in cybersecurity solutions and among others. The building of HPC infrastructure permits to organize the technological platform to increase the productive and business indicators of the organizations. This paper describes an architecture as reference model and ecosystem for the building and systematic improvement of HPC infrastructures based on practical experiences from successive process of HPC infrastructure building on cloud deployment. That’s processes have been useful for the organizations permitting the integration of emergent hardware and software components launched to the international market. This landscape vision is pertinent for academics, scientifics and business organizations compelled to implement scientific and engineering applications to diverse fields that have a high impact in the society digital transformation.
Volume: 23
Issue: 5
Page: 1228-1246
Publish at: 2025-10-01

A proposed scheduling algorithm for real time application in 5G networks

10.12928/telkomnika.v23i5.26511
Moaath Saleh; University of Baghdad Abdulrahman , Buthaina Mosa; University of Baghdad Omran
The third-generation partnership developed the fifth-generation specifications to satisfy the expansion of mobile applications and the grown demand for extra data flow. As the real time services in 5G networks are widespread, professional scheduling algorithms are necessary to deal with the assignment of the scarce frequency resources among different categories of applications, ensuring the quality of service and improving the user experience. This paper proposes a real time flow scheduling algorithm by enhancing the scheduling metric to prioritize real time flows such as voice and video, particularly as the packet delay approaches its threshold time. The performance metrics of the proposed algorithm were evaluated and compared to three well-known algorithms, which are the modified largest weighted delay first, the exponential proportional fair, and the logarithmic rule. The simulation results, which was conducted by a dedicated software, showed that the proposed algorithm achieved up to 1.5 times the throughput of the other algorithms and resulted in less than half the video packets loss ratio compared to others, moreover, it offered a higher fairness index between users than other algorithms for video packets.
Volume: 23
Issue: 5
Page: 1155-1165
Publish at: 2025-10-01

Optimal active disturbance rejection control with applications in electric vehicles

10.12928/telkomnika.v23i5.26867
Juan; Universidad Nacional de Colombia Quecan-Herrera , Sergio; Universidad Nacional de Colombia Rivera , Jorge; Purdue Univerity Neira-Garcia , John; Universidad Nacional de Colombia Cortés-Romero
This work proposes an optimal control strategy based on a modified active disturbance rejection control (ADRC) that considers disturbance weighting for a three-phase induction motor under rotor field-oriented control (FOC) to enhance energy efficiency. Induction motors (IMs) are widely used in electric vehicles (EVs) due to their cost-effectiveness and technological maturity. However, improving energy efficiency remains a key challenge, as it directly impacts vehicle range. The proposed approach employs ADRC, where part of the disturbance rejection task is handled offline by a hybrid optimization algorithm combining particle swarm optimization (PSO), tabu search (TS), and simulated annealing (SA) to tune a state-feedback controller. The controller parameters are optimized using a composite cost function that balances energy consumption and performance. Simulation and experimental results indicate that disturbance weighting has a significant impact on both problem complexity and performance. Optimal weighting improves the overall system response compared to conventional disturbance rejection methods. Energy and performance analyses show that disturbance weighting enhances energy usage compared to the traditional ADRC method, suggesting a novel efficiency control strategy for electric machines.
Volume: 23
Issue: 5
Page: 1427-1438
Publish at: 2025-10-01

Hybrid Kolmogorov-Arnold and convolutional neural network model for single-lead electrocardiogram classification

10.12928/telkomnika.v23i5.26735
Marlin Ramadhan; National Research and Innovation Agency Baidillah , Pratondo; National Research and Innovation Agency Busono , I Made; National Research and Innovation Agency Astawa , Syaeful; National Research and Innovation Agency Karim , Ronny; National Research and Innovation Agency Febryarto , I Putu Ananta; National Research and Innovation Agency Yogiswara , Chaerul; Padjadjaran University Achmad , Nashrullah; National Research and Innovation Agency Taufik
This study proposes a hybrid Kolmogorov-Arnold networks (KANs) and convolutional neural networks (CNN) to classify electrocardiogram (ECG) signal abnormalities in one lead ECG data of wearable telemedicine. The hybrid model combines CNN to extract hierarchical features from sequential data and KANs to model non-linear relationships with fewer parameters as an efficient classification. The study explores the model’s capacity to balance accuracy, computational efficiency, and memory usage as critical factors for real-time health monitoring in resource-constrained environments on the single-lead MIT-Beth Israel hospital (MIT-BIH) Supraventricular Arrhythmia database with five different class labels. For comparison, standalone CNN and KAN models were also trained on the same balanced dataset. The CNN model achieved an accuracy of 96.62%, precision of 96.81%, and recall of 96.53%. The KAN model, while computationally efficient, performed less effectively, with an accuracy of 94.15%, precision of 95.01%, and recall of 92.57%. In contrast, our hybrid KAN-CNN model outperformed both, attaining an accuracy of 97.53%, precision of 97.66%, recall of 97.40%, and a low loss of 0.0840. The study also explores the impact of quantization and compression on model performance, revealing that both CNN and Hybrid KAN-CNN models retained high accuracy post-quantization, whereas the KAN model exhibited a more significant drop in performance.
Volume: 23
Issue: 5
Page: 1342-1352
Publish at: 2025-10-01

Cost-effective long-range secure speech communication system for internet of things-enabled applications

10.12928/telkomnika.v23i5.26884
Samer; German Jordanian University Alabed , Mohammad; American University of the Middle East Al-Rabayah , Bahaa; Yarmouk University Al-Sheikh , Lama Bou; Lebanese German University Farah
A new communication framework has been developed that allows voice transmission over long distances for internet of things (IoT) applications such as healthcare, smart cities, and remote monitoring in the least costly way and most secure manner. The system is based on long range (LoRa) technology and takes advantage of its spread spectrum technique, to provide long range transmission without the high-power requirements. The main limitation is LoRa’s bandwidth with a maximum throughput of 22 kbps for data. This presents a challenge for voice transmission communications. To address this shortened bandwidth issue, researchers developed an innovative compression solution that compresses voice data to less than 8 kbps to fit into LoRa’s capabilities. The compression allows for real practical voice communications and possibly can provide even greater distance than an uncompressed voice transmission update. The voice communications transmissions have cryptographic protection in place to protect the transmitted voice messages from unauthorized access.
Volume: 23
Issue: 5
Page: 1415-1426
Publish at: 2025-10-01

Regulation of glucose insulin metabolism using feedback linearization

10.12928/telkomnika.v23i5.26408
Meriem; University of Sétif Samai , Ghedjati; University of Sétif Keltoum , Abdelaziz; University of Sétif Mourad
Diabetes is a chronic disease that occurs when the pancreas does not produce enough insulin, or when the body is not able to effectively use the insulin it produces. Insulin is a hormone that regulates blood sugar levels, this regulation is done by the pancreas. When this organ is damaged, the patient will have to regulate its blood sugar level themselves. This task is really painful and we will have to resort to an artificial pancreas or we will have to design a regulator which stabilizes blood sugar at its basal value. Several controls have been developed and the objective of this paper is to use input output linearization technique to regulate blood glucose levels by injecting an adequate quantity of insulin. The glucose insulin metabolism is a non-linear system whose input is the quantity of insulin to be injected and the output is the blood glucose measured in the blood. Simulations examples are given to demonstrate the usefulness of the command developed.
Volume: 23
Issue: 5
Page: 1385-1394
Publish at: 2025-10-01

Optimized human detection in NLOS scenarios using hybrid dimensionality reduction and SVM with UWB signals

10.12928/telkomnika.v23i5.26738
Enoch Adama; Landmark University Jiya , Ilesanmi Banjo; Ekiti State University Oluwafemi , Emmanuel Sunday Akin; Landmark University Ajisegiri
Trapped victim localization in search and rescue (SAR) operations is especially difficult in non-line-of-sight (NLOS) conditions, where traditional techniques fail due to debris and signal distortion. Ultra-wideband (UWB) NLOS signal datasets offer a promising alternative but are often high-dimensional and noisy. This study proposes an optimized dimensionality reduction framework combining an adaptive human presence detector (AHPD) with genetic algorithms (GA) and independent component analysis (ICA), followed by support vector machine (SVM) classification. The approach is tested on a public NLOS dataset comprising 23,522 dynamic instances, each with 256 signal samples per attribute, simulating complex SAR scenarios including rubble and dynamic obstacles. The results indicate that the AHPD+GA+SVM model reached an accuracy of 85.78%, sensitivity of 80.00%, and specificity of 96.46%, which is better than the AHPD+ICA +SVM model that had an accuracy of 79.20%, sensitivity of 73.07%, and specificity of 81.05%. These findings demonstrate the framework’s robustness and scalability, making it a strong candidate for real-time human detection in disaster recovery missions.
Volume: 23
Issue: 5
Page: 1291-1303
Publish at: 2025-10-01

Enhanced torque control for horizontal-axis wind turbines via disturbance observer assistance

10.12928/telkomnika.v23i5.26805
Edwin; Fundación Universitaria Los Libertadores Villarreal-Lopez , Horacio; Universidad de San Buenaventura Coral-Enriquez , Sergio; Samara National Research University Tamayo-Leon
This paper presents an enhanced control strategy for optimizing energy capture in horizontal axis wind turbines operating in the partial-load region (region 2). The proposed approach builds upon conventional standard torque control (STC) by incorporating a generalized extended state observer (GESO) that follows the active-disturbance-rejection paradigm. Although traditional torque control methods have proven effective under steady wind conditions, they often lack robustness against disturbances, system faults, and model uncertainties inherent in wind energy systems. The proposed observer-assisted control scheme addresses these limitations by estimating and compensating for total disturbance signals, including non-modeled dynamics, parameter uncertainties, and actuator faults. The effectiveness of the proposed control strategy is validated through comprehensive simulations using a 5 MW wind turbine model subjected to realistic operational conditions. Simulation scenarios include turbulent wind speed profiles and actuator degradation to assess controller performance. The results demonstrate improved robustness and energy capture efficiency compared to the conventional control approach, while maintaining the simplicity of the implementation. This work contributes to the development of more reliable wind energy conversion systems (WECSs) by offering a practical solution that improves both performance and fault tolerance in partial load operation.
Volume: 23
Issue: 5
Page: 1395-1403
Publish at: 2025-10-01

Deep transfer learning based disease detection and classification of tomato leaves - a comparative analysis

10.12928/telkomnika.v23i5.26887
Munira Akter; University of Frontier Technology Lata , Marjia; Begum Rokeya University Sultana , Iffat Ara; Begum Rokeya University Badhan , Mastura Jahan; University of Frontier Technology Maria , Fariha Tasnim; University of Frontier Technology Nuha
A wide variety of diseases have a significant impact on tomato plants. To avoid crop quality issues, a prompt and precise diagnosis is crucial. Classifying plant diseases is one of the numerous applications where deep transfer learning models have recently produced remarkable results. This study dealt with fine-tuning by contrasting the most advanced architectures, including Inception V3, ResNet-18, ResNet-50, VGG-16, VGG-19, GoogLeNet, and AlexNet. In the end, a comparison evaluation is conducted. Nine distinct tomato disease classes and one healthy class from PlantVillage make up the dataset used in this study. Precision, recall, F1-score, and accuracy were the basis for a multiclass statistical analysis that assessed the models. The ResNet-50 approach yielded significant results with precision: 82%, recall: 81%, F1-score: 81%, and accuracy: 85%. With this high success rate, it is reasonable to say that mobile applications or IoT-compatible gadgets implemented with the ResNet-50 model can assist farmers in identifying and safeguarding tomatoes against the aforementioned diseases.
Volume: 23
Issue: 5
Page: 1353-1362
Publish at: 2025-10-01

The comparison of underwater source localization between Riemannian MFP and blind channel equalizer

10.12928/telkomnika.v23i5.27115
Tran Cao; University of Engineering and Technology Quyen , Tran Linh Huong; University of Language and International Studies Giang
Blind channel equalization (BCE) has been widely used in underwater communications due to its strong robustness against multipath propagation and its suitability for rapidly varying environments. However, there has been little research on the application of BCE for underwater source localization. On the other hand, conventional matched field processing (MFP), and particularly Riemannian MFP (RMFP), have been regarded as highly effective for this problem. In this paper, based on the statistical characterization of the signal-to-noise ratio (SNR) in underwater acoustic channels, we propose a method for estimating the channel transfer function, which is then used to construct a blind channel equalizer. A source localization approach using the proposed BCE is also presented. The localization performance using BCE is comparable to that of RMFP, achieving a depth error of 10 meters and a range error of 100 meters, while requiring significantly lower computational complexity.
Volume: 23
Issue: 5
Page: 1201-1211
Publish at: 2025-10-01

A dual-band modified-rectangular patch with parasitic antenna for 2.4/5 GHz wireless local area network applications

10.12928/telkomnika.v23i5.27055
Suthasinee; Rajamangala University of Technology Isan Khonkaen Campus Lamultree , Sakolkorn; Rajamangala University of Technology Isan Khonkaen Campus Ungprasutr , Charinsak; Rajamangala University of Technology Isan Khonkaen Campus Saetiaw , Chuwong; King Mongkut’s Institute of Technology Ladkrabang Phongcharoenpanich
This research presents the design and implementation of a dual-band patch antenna (DBPA) optimized for 2.4 GHz and 5 GHz wireless local area network (WLAN) applications. The antenna features a modified rectangular patch with a cut corner and two parasitic rectangular patches, enabling dual-band operation with enhanced gain. The DBPA is fed by a 50-Ohm coplanar waveguide and fabricated on a single-layer copper circuit board using a flame-retardant 4 substrate with a relative permittivity of 4.3 and a thickness of 1.6 mm. A prototype with compact dimensions of 0.040×0.040×0.0009 λ³ was constructed and experimentally evaluated. Measurements reveal a nearly omnidirectional radiation pattern, achieving peak gains of 2.92 dBi at 2.4 GHz and 4.25 dBi at 5 GHz. The antenna demonstrates a wide 10 dB return loss bandwidth of 67.7% (1.7–3.44 GHz) for the lower band and 56% (4.59–8.16 GHz) for the upper band. The strong agreement between simulated and measured results validates the design’s potential for practical and scalable implementation. This DBPA design offers a simpler, more compact, and wider-bandwidth alternative to conventional antennas, making it ideal for modern WLAN systems.
Volume: 23
Issue: 5
Page: 1177-1187
Publish at: 2025-10-01
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