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31,456 Article Results

Three-phase hybrid active power filter: an overview

10.11591/ijece.v15i2.pp1361-1371
Le Quang Binh , Chau Minh Thuyen
Hybrid active power filter (HAPF) is considered an effective solution for filtering harmonics and compensating reactive power in power systems. It is a combination of passive power filters and an active power filter to form many different structures depending on the system voltage and load characteristics. This paper aims to introduce an overall picture of the results of research on three-phase HAPF systems, such as: HAPF models, advantages, disadvantages, and scope of application of each model; methods for determining parameters of passive power filters; structure, response time, resonance, power loss and cost of types of output filters; inverter structure and commonly used pulse width modulation methods in HAPF; control strategies and used controllers are also listed and compared; the DC Link voltage stabilization is also summarized and analyzed. Finally, the existing problems and the development trends of HAPF.
Volume: 15
Issue: 2
Page: 1361-1371
Publish at: 2025-04-01

A comparative analysis of transfer learning models on suicide and non-suicide textual data

10.12928/telkomnika.v23i2.25654
Merinda; Universitas Muhammadiyah Malang Lestandy , Abdurrahim; Islamic University of Indonesia Abdurrahim , Amrul; Universitas Muhammadiyah Malang Faruq , Muhammad; Universitas Muhammadiyah Malang Irfan
The rise of social media has allowed individuals to express themselves freely, increasing the visibility of mental health concerns, including suicidal tendencies. This issue is particularly significant, as suicide is one of the leading causes of death globally. The objective of this study is to develop a model capable of accurately detecting suicide-related textual data using advanced natural language processing techniques. To achieve this, we applied transfer learning models, including bidirectional encoder representations from transformers (BERT), robustly optimized bidirectional encoder representations from transformers (RoBERT), a lite BERT (ALBERT), and decoding-enhanced BERT with disentangled attention (DeBERTa). the dataset used in this research includes 232,074 posts from Reddit, categorized into suicide and non-suicide labels. Preprocessing steps such as removing HTML tags, special characters, and punctuation were applied, followed by stopword removal and lemmatization. The models were trained and evaluated using accuracy, precision, recall, and F1-score metrics. Among the models tested, DeBERTa demonstrated superior performance, achieving an accuracy of 98.70% and an F1-score of 98.70%. These findings suggest that transfer learning models, particularly DeBERTa, are effective in identifying suicidal ideation in textual data.
Volume: 23
Issue: 2
Page: 426-434
Publish at: 2025-04-01

Modelling and validation of hybrid series active filter for power quality enhancement using OPAL-RT simulator

10.11591/ijece.v15i2.pp1274-1288
Nitisha Shrivastava , Arjun Baliyan
It is a known fact that the quality of power is degrading at a very fast rate. The reason behind this is harmonics in the power supply. The main motive is to reduce the harmonic pollution in the system for various combinations of the load. The method proposed in this paper consists of hybrid series active power filter (HSAPF) which is a combination of an active power filter connected in series and the passive filter in parallel with the load. In order to generate the compensating signals, synchronous reference method has been used and the tuning of the proportional integral (PI) controller is performed with grey wolf optimization technique. It provides the optimized values of controller parameters that are very much necessary to improve not only the transient but also the steady state characteristics of the system. For comparison purposes the tuning of PI controller is also done using the well- known particle swarm optimization technique. A comparative simulation analysis is done in MATLAB as well as the results are verified by using OPAL-RT 4510 real time simulator which proves that the suggested topology gives better results in terms of total harmonic distortion (THD) reduction.
Volume: 15
Issue: 2
Page: 1274-1288
Publish at: 2025-04-01

Managing cyber resilience literacy for consumers

10.11591/ijict.v14i1.pp122-131
Tatiana Antipova , Simona Riurean
It seems inevitable that digitalization will have a profound and irreversible impact on our lives, and it seems reasonable to suppose that our world will never be the same again. Objectives of this study is to gain insight into consumers’ understanding of cyber security threats and their willingness to enhance their cyber resilience. To achieve this, a survey was conducted using AI tools such as Open ChatGPT, Copilot and PI. The survey was distributed selectively among consumers via Google Form. The results of the survey conducted during the study indicated that the majority of respondents (72%) expressed interest in attending online interactive seminars to gain more knowledge about managing cybersecurity threats. However, respondents with the lowest cyber resilience knowledge did not express the same level of interest. With technology becoming an increasingly important aspect in our everyday lives, it is becoming ever clearer that cybersecurity posture relies on the behavior consumers and organizations. Based on the rule that ‘never trust, always verify’ we designed ‘cybersecurity zero-trust framework model’ for consumers that allows them to protect themselves against cybersecurity threats. In an ever-shifting landscape of cybersecurity, it is important to recognize the value of continuous education as a necessity, not just an option.
Volume: 14
Issue: 1
Page: 122-131
Publish at: 2025-04-01

Radionuclide identification system using convolution neural network for environmental radiation monitoring

10.11591/ijece.v15i2.pp2282-2290
Istofa Istofa , Gina Kusuma , Firliyani Rahmatia Ningsih , Joko Triyanto , I Putu Susila , Prawito Prajitno
Radionuclide identification is an important task for nuclear safety and security aspects, especially to environmental radiation monitoring systems. This study aims to build an automatic radionuclide identification system that can be applied in environmental radiation monitoring stations. The gamma energy spectrum was obtained by varying radionuclide types, measurement time and source distance using a scintillation detector. The dataset was collected by converting gamma energy spectrum into images, data pre-processing by removing background noise and normalizing the gamma spectrum. Automatic identification is demonstrated as a development method based on convolutional neural network (CNN) algorithm, where the images come from gamma-ray spectrum in the form of photoelectric peak characteristic. Three CNN architectures are used to train the model, which are VGG-16, AlexNet and Xception. The performance of each model is evaluated using accuracy, precision and recall to find the appropriate architecture. The most optimum results are shown by VGG-16 with an accuracy of 97.72%, a precision of 97.75% and a recall of 97.71%. The models are critically reviewed and it is concluded that the developed models can be further implemented on embedded devices utilizing the tiny machine learning (TinyML) platform in environmental radiation monitoring systems.
Volume: 15
Issue: 2
Page: 2282-2290
Publish at: 2025-04-01

Embedded systems and artificial intelligence for enhanced humanoid robotics applications

10.11591/ijece.v15i2.pp1912-1923
Jalal Hdid , Oussama Lamsellak , Ahmad Benlghazi , Abdelhamid Benali , Ouafae El Melhaoui
This paper presents a method for collecting precise hand gesture (HG) data using a low-cost embedded device for an embedded artificial intelligence (EAI)-based humanoid robotics (HR) application. Despite advancements in the field, challenges remain in deploying cost-effective methods for accurately capturing and recognizing body gesture data. The ultimate objective is to develop humanoid robots (HRS) capable of better understanding human activities and providing optimal daily life support. In this regard, our approach utilizes a Raspberry Pi Pico microcontroller with a 3-axis accelerometer and a 3-axis gyroscope motion sensor to capture real- time HG data, describing ten distinct real-world tasks performed by the hand in experimental scenarios. Collected data is stored on a personal computer (PC) via a micro-python program, forming a dataset where tasks are classified using ten supervised machine learning (SML) models. Two classification experiments were conducted: the first involved predicting raw data, and the second applied normalization and feature extraction (FE) techniques to improve prediction performance. The results showed promising accuracy in the first phase (89% max), with further improvements achieved in the second phase (94% max). Finally, by employing similar methods, we can integrate highly trained machine learning (ML) models into embedded humanoid robotic systems, enabling real-time human assistance.
Volume: 15
Issue: 2
Page: 1912-1923
Publish at: 2025-04-01

Boosting industrial internet of things intrusion detection: leveraging machine learning and feature selection techniques

10.11591/ijai.v14.i2.pp1232-1241
Lahcen Idouglid , Said Tkatek , Khalid Elfayq
The rapid integration of industrial internet of things (IIoT) technologies into Industry 4.0 has revolutionized industrial efficiency and automation, but it has also exposed critical vulnerabilities to cyber threats. This paper delves into a comprehensive evaluation of machine learning (ML) classifiers for detecting anomalies in IIoT environments. By strategically applying feature selection techniques, we demonstrate significant enhancements in both the accuracy and efficiency of these classifiers. Our findings reveal that feature selection not only boosts detection rates but also minimizes computational demands, making it a cornerstone for developing resilient intrusion detection systems (IDS) tailored for Industry 4.0. The insights garnered from this study pave the way for deploying more robust security frameworks, safeguarding the integrity and reliability of IIoT infrastructures in modern industrial settings.
Volume: 14
Issue: 2
Page: 1232-1241
Publish at: 2025-04-01

Computer science and educational games to enhancing students’ Islamic content learning

10.11591/ijere.v14i2.29459
Ahmed Tlili , Salim Chikhi
Learning in all humanities content branch such as Islamic sciences is declared to be boring, tiring and very dry plain content because the educational level of learners becomes low and worrying. This statement is justified by the result of our statistical study which reveals that learning of Islamic content is not attractive and needs to be revolutionized in order to make it more attractive and interesting for the new generation called digital generation. In this paper, we have used the gamification concept with learning analytics (LA) approach to design an educational game to improve Islamic content learning. However, and due to the lake of works and the knowledge about teaching Islamic contents using education games look insufficient and at their begins. The obtained results, in this study, with proposed approach, shows that the students had remarkably higher motivation and performance to learn than before. The main objective of this investigation is, firstly, allows managers and teachers easily incorporate LA approaches to help student improves their learning; and secondly, future work benefits from these results to define an appropriate dashboard for the Islamic content learning and teaching.
Volume: 14
Issue: 2
Page: 995-1003
Publish at: 2025-04-01

IC-CGAN: Imbalanced class-conditional generative adversarial network with weighted loss function

10.11591/ijece.v15i2.pp1632-1646
Chaitra Ravi , Siddesh Gaddadevara Matt
This research proposes an advanced deep learning model that deals with the over-distribution of plant leaf disease classes by using an imbalanced class-conditional generative adversarial network (IC-CGAN) that is coupled with a weighted loss function. IC-CGAN model provides a solution to class imbalance through the synthesis of tomato leaf disease images and adding them to the dataset which as a consequence, improves the accuracy of disease detection. The weighted loss function essentially does a crucial job of solving the problem of imbalance in class during the training stage. Mixing of these models leads to the generation of realistic leaf disease synthetic images and balancing class distribution in the dataset, hence improving of tomato disease detection model’s accuracy. This study is another step toward the development of effective disease detection systems for agricultural purposes by addressing the concern of class imbalance with IC-CGAN through the vector-weighted loss function. The proposed IC-CGAN has a high chance of enhancing the disease detection at its early stage with a much higher level of accuracy (99.95%), precision (99.98%), recall (99.98%) and F1-score (99.98%) in tomato plant leaf disease detection.
Volume: 15
Issue: 2
Page: 1632-1646
Publish at: 2025-04-01

Design and implementation of an internet of things enabled stress level detection system using fuzzy logic method for enhanced accuracy and real-time monitoring

10.11591/ijece.v15i2.pp2499-2512
Nurhayati Nurhayati , Nur Hidayah , Muh. Ahyar , Asriyadi Asriyadi , Yuniarti Yuniarti , Muhira Dzar Faraby , Mustika Mustika , Asmah Akhriana , Mukhlisin Mukhlisin
Stress can affect individuals of all ages, from the young to the elderly, leading to a compromised immune system and increased susceptibility to illness. This study addresses this issue by developing an internet of things (IoT) based stress level detection system utilizing fuzzy logic methods. The device measures multiple physiological parameters and processes the data using an ESP32 microcontroller. This allows individuals to monitor and understand their stress levels efficiently and automatically through a liquid crystal display (LCD) display and Android devices. The system integrates various sensors to capture vital signs such as heart rate (HR), respiration rate, and body temperature. These readings are then analyzed using its algorithms to determine the stress level, which is displayed on both the onboard LCD and the connected Android device via an IoT interface. This real-time feedback mechanism empowers users to take proactive measures in stress management. Testing and validation of the device were conducted by comparing its readings with the depression anxiety stress scales (DASS-42) test results. The comparison showed an 80% correlation, demonstrating the device’s accuracy and reliability in detecting stress levels. This innovative approach leverages the advantages of IoT and fuzzy logic to provide a practical and effective solution for stress monitoring and management.
Volume: 15
Issue: 2
Page: 2499-2512
Publish at: 2025-04-01

Efficient blockchain based solution for secure medical record management

10.11591/ijict.v14i1.pp59-67
Debani Prasad Mishra , B Rajeev , Soubhagya Ranjan Mallick , Rakesh Kumar Lenka , Surender Reddy Salkuti
Electronic medical records (EMRs) have become a key player in the healthcare ecosystem contributing to the assessment of ailments, the choice of the treatment avenue, and the delivery of services. However, there is consideration of EMR storage whereby centralized storage leads to increased security and privacy issues in the patient’s record. In this paper, we proposed a blockchain and interplanetary file system (IPFS) based prototype model for EMR management. It provides a smart contract-enabled decentralized storage platform where healthcare data security, availability, and access management are prioritized. This model also employs cryptographic techniques to protect sensitive healthcare data. Finally, the model is evaluated in a realistic scenario. The experimental results demonstrate that compared to the current systems, the proposed prototype model outperforms them in terms of efficiency, privacy, and security.
Volume: 14
Issue: 1
Page: 59-67
Publish at: 2025-04-01

Principal instructional leadership practice and its relationship with teacher job performance

10.11591/ijere.v14i2.31127
Xiang Yuanyuan , Bity Salwana Alias
Excellent principal leadership actions will be guidance for teachers’ high-quality teaching performance. However, the role of instructional principal is not fully utilized, and principals lack the highly effective leadership qualities necessary to promote teachers in improving teacher job performance. This study was conducted in Shenzhen, China to investigate the effect of principal instructional leadership practices on teachers’ job performance. This study employed a quantitative approach. The sample of the study was all private secondary school teachers in Shenzhen China, consisting of 297 teachers selected from 1,300 populations. To figure out the research questions, SPSS software was used with the help of descriptive and inferential analysis. The findings of this study show that both principal instructional leadership practice and teachers’ job performance are at a high level. Moreover, there was a very strong positive relationship between two variables (r=0.974). In conclusion, the findings underscore the significance of principals’ instructional leadership attributes on teacher job performance and provide implications for the government and the school principals regarding the implementation of principal training system or the improvement of educational management policy in private schools throughout Shenzhen, China.
Volume: 14
Issue: 2
Page: 1097-1104
Publish at: 2025-04-01

Low complexity rate control for versatile video coding with hybrid Lagrange multiplier

10.11591/ijece.v15i2.pp1686-1695
Alexander Victor Bukit , Suwadi Suwadi , Wirawan Wirawan
Versatile video coding (VVC) has a notable increase in encoding efficiency over high efficiency video coding (HEVC) but bandwidth and storage are limited in real-world video applications, so rate control is crucial. Even if VVC shows a notable increase in encoding capacity over HEVC, the rate control may create fluctuations in video quality and computational complexity. This fluctuation can have a significant impact on the watching experience, particularly in low-bitrate settings. The rate control variables of the consistent resolution and the decreased resolution are proposed in order to make the rate control method hybrid to consistent resolutions and reduce computational complexity. To achieve optimal coding parameters, the frames with varying resolutions Lagrange multiplier (λ), skip coding tree unit (CTU) and quantization parameter (QP) are combined. After evaluation, the average encoding time savings (𝑇𝑠𝑎𝑣𝑖𝑛𝑔) were found to be 19.49%, with a Bjontegaard delta bit rate (BDBR) of -0.44% indicating insignificant quality loss.
Volume: 15
Issue: 2
Page: 1686-1695
Publish at: 2025-04-01

Modeling and enhancing inverse kinematics algorithms for real-time target tracking in inertial stabilization systems

10.11591/ijece.v15i2.pp1544-1556
Abderahman Kriouile , Soufiane Hamida , Abdoul Latif Abdou Moussa
This study develops a two-axis gimbal system designed to maintain a target within its field of view by compensating for motion of either the target or the platform. The focus is on inertial stabilization platforms (ISPs), where accurate, real-time tracking is essential for applications such as surveillance, navigation, and scientific observation. The research prioritizes the design and optimization of inverse kinematics algorithms to enhance system performance. A detailed analysis of mathematical models underpins the development, addressing challenges in real-time processing with advanced optimization techniques to minimize latency and maximize accuracy. The proposed algorithms achieve a mean tracking error of 0.002 m and a mean convergence time of 2.12 seconds, surpassing traditional methods in precision and efficiency. Performance is evaluated within a simulation framework using Simscape Multibody, testing the algorithms under various conditions. Validation extends to real-world scenarios to ensure robustness and practical applicability. The results demonstrate significant improvements in tracking accuracy and responsiveness, offering a reliable solution for dynamic environments. This work paves the way for more efficient gimbal systems, contributing to advancements in technologies requiring stable and precise tracking in dynamic and challenging settings.
Volume: 15
Issue: 2
Page: 1544-1556
Publish at: 2025-04-01

Tilted fiber Bragg grating based optical sensor for simultaneous measurement of vital signs: a novel approach

10.11591/ijece.v15i2.pp1434-1445
Ramya Arumugam , Ramamoorthy Kumar , Samiappan Dhanalakshmi
Vital signal monitoring acts as a highly significant diagnostic method. Continuous monitoring of vital signs like temperature, heart rate, and blood pressure aids in easy and fast disease diagnosis. Existing methods that enable continuous monitoring, such as smart watches, are not accurate enough to be used as a benchmark for diagnosing diseases. In this paper, we propose simultaneous temperature and heart rate measurement using tilted fiber Bragg grating (TFBG) which enables concurrent measurement of measurands due to its intrinsic optical property. Temperature and heart rate were considered for measurement. The proposed TFBG-based optical sensor has a sensitivity of 11.81 pm/°C and 1.73 pm/µε towards variation in temperature and strain, respectively. The sensitivity was determined by a shift in the wavelength of core mode resonance for temperature and a differential change in the wavelength of cladding mode resonance for heart rate. The average response time of the proposed TFBG sensor was found to be 3 seconds. Accuracy of 99.68% and 98.42% were achieved in temperature and heart rate measurements by the proposed TFBG sensor. The acceptability of the proposed TFBG sensor was analyzed using the Bland- Altman plot.
Volume: 15
Issue: 2
Page: 1434-1445
Publish at: 2025-04-01
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