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31,456 Article Results

Enhanced matrix pencil method for robust and efficient direction of arrival estimation in sparse and multi-frequency environments

10.11591/ijece.v15i6.pp5380-5387
Ashraya A. N. , Punithkumar M. B.
Accurate direction of arrival (DOA) estimation is vital for applications in radar, sonar, wireless communication, and localization. This paper proposes an enhanced matrix pencil method (MPM) framework to overcome limitations of traditional methods such as noise sensitivity, computational inefficiency, and challenges with sparse arrays. The framework incorporates wavelet-based denoising for improved robustness in low signal-to-noise ratio (SNR) environments and employs particle swarm optimization (PSO) to optimize key parameters, achieving a balance between accuracy and efficiency. Extending MPM to two-dimensional (2D) DOA estimation, the method precisely determines azimuth and elevation angles. Comprehensive mathematical formulations and eigenvalue computations underlie the proposed enhancements. Simulation results validate its superiority over state-of-the-art techniques like MUSIC and ES-PRIT, achieving up to 30% improvement in root mean square error (RMSE) and reducing computational time by 20%–30%. Sensitivity analysis demonstrates robustness across varying noise levels, array geometries, and multi-frequency scenarios. This scalable and efficient framework addresses critical challenges in DOA estimation and offers promising directions for future advancements in real-time and resource-constrained environments.
Volume: 15
Issue: 6
Page: 5380-5387
Publish at: 2025-12-01

Autism virtual reality education media integration in applied behavior analysis training

10.11591/ijere.v14i6.34093
Yunxia Nie , Poonsri Vate-U-Lan , Panneepa Sivapirunthep
This study examined the impact of autism virtual reality education (autism VR-Ed) media in enhancing college student teachers’ skills in applied behavior analysis (ABA) for children with autism spectrum disorder (ASD). A total of 40 student teachers from Guangxi College for Preschool Education, China, participated in a three-month experiment using a 9-task autism VR-Ed media. Pre- and post-tests showed significant improvement in ABA skills, with scores rising from 18.05 (SD=3.00) to 41.10 (SD=2.25), t(39)=-48.394, p<.05. All participants achieved over 60 points, confirming effective skill acquisition. A perception survey revealed positive attitudes toward the media, highlighting its ease of use, engagement, and relevance to future professional needs. These results demonstrated the potential of VR technology to bridge the gap between theory and practice in special education by offering immersive learning experiences. Autism VR-Ed media enhanced ABA training beyond traditional methods, supporting the professional growth of special education teachers. This study contributed to integrating VR technology into special education curricula and improving teacher training quality, thereby effectively supporting the rehabilitation of children with ASD. Future research should explore the long-term benefits of VR-based training and its broader applications and assess its impact on the learning outcomes of children with ASD.
Volume: 14
Issue: 6
Page: 4677-4688
Publish at: 2025-12-01

The use of geographic information systems to measure the financial performance of micro enterprises

10.11591/ijai.v14.i6.pp5333-5343
Elfreda Aplonia Lau , Sri Endayani , Umi Kulsum , Andrew Stefano , Abdul Rokhim , Purbawati Purbawati
This study examines the application of geographic information systems (GIS) to measure and visualize the financial performance of micro enterprises in remote areas of East Kalimantan, Indonesia. Micro enterprises are crucial to local economies but often face barriers such as limited capital access, inadequate infrastructure, and insufficient business training. Using a mixed-method approach, the research combined surveys of 200 micro business owners, secondary economic data, and GIS-based spatial analysis. The results indicate clear spatial disparities: enterprises located closer to financial institutions and training programs achieved 25–30% higher profitability and stronger operational resilience. GIS mapping effectively identified performance clusters and underserved zones, providing actionable insights for targeted policy interventions. Key factors influencing financial outcomes include access to capital, training opportunities, and infrastructure quality. This study demonstrates the value of GIS as a decision-support tool for policymakers in designing spatially informed financial assistance, infrastructure planning, and mobile training deployment. The findings contribute to socio-economic planning discourse and propose a replicable GIS-based framework for strengthening microenterprise resilience in underdeveloped regions.
Volume: 14
Issue: 6
Page: 5333-5343
Publish at: 2025-12-01

Business intelligence through data visualization: a case study using marketing campaign dataset

10.12928/telkomnika.v23i6.27166
Aditi; Chandigarh College of Engineering and Technology Bansal , Ankit; Chandigarh College of Engineering and Technology Gupta
In today’s competitive business environment, data-driven marketing strategies are essential for successful campaign outcomes. This study presents a comprehensive analysis of marketing campaign data, emphasizing its role in enhancing customer engagement, improving decision-making, and increasing conversion rates. It explores the complexity of campaign dynamics and consumer behavior, demonstrating how business intelligence and data visualization techniques support informed marketing decisions and actionable insights. Advanced data science methods such as data cleaning, feature engineering, and cross-validation enhance predictive accuracy and campaign optimization. Visualization plays a central role in transforming raw data into interpretable insights, enabling businesses to identify trends in customer preferences and purchasing behavior. Key findings reveal that customers aged 51–70, particularly those with higher education and income levels, show the greatest purchasing power, especially for wine and meat products. These insights help align marketing strategies with data-driven understanding to design personalized campaigns that resonate with target audiences. By combining analytical methods with effective visualization, businesses can develop impactful campaigns that drive engagement, boost conversions, and foster revenue growth. The study concludes with directions for future research, including real-time data processing and automated decision-making systems to ensure continuous improvement in digital marketing strategies.
Volume: 23
Issue: 6
Page: 1466-1475
Publish at: 2025-12-01

Performance enhancement of PV generator using a sensor based dual axis solar tracking system in Algeria

10.12928/telkomnika.v23i6.26872
Sakina; Udes/Centre De Développement des Énergies Renouvelables (CDER) Atoui , Harb; University of Algiers 1 Benyoucef Benkhedda Hadjer , Belaïd; University of Algiers 1 Benyoucef Benkhedda Abdelghani
This article presents the implementation of a two-axis solar tracking system and its impacts to increase the performance of the photovoltaic system in northern Algeria. The system enhances the efficiency of solar systems by optimizing their exposure to sunlight making the sunbeam perpendicular to solar panel. The main objective of the study is to develop a technically proficient and economically viable solution to increase solar energy production. The design relies on integrating light sensors and motors controlled by an Arduino board, enabling automatic adjustment of solar panel positions. This approach offers dynamic and precise orientation, based on light dependent resistor (LDR) sensor design and threshold value, resulting in a significant increase in energy output. The results show that the dual-axis solar tracking system can capture 60.64% more solar energy, taking into account the power consumption of the two electric actuators. The findings of this study will positively influence the promotion of clean and sustainable energy sources while providing a practical solution for more efficient utilization of solar energy in Algeria.
Volume: 23
Issue: 6
Page: 1706-1717
Publish at: 2025-12-01

Object detection and tracking with decoupled DeepSORT based on αβ filter

10.12928/telkomnika.v23i6.27500
Lakhdar; University of Sciences and Technology of Oran (USTO-MB) Djelloul Mazouz , Abdessamad; University of Sciences and Technology of Oran (USTO-MB) Kaddour Trea , Tarek; University of Sciences and Technology of Oran (USTO-MB) Amiour , Abdelaziz; University of Sciences and Technology of Oran (USTO-MB) Ouamri
With the rapid growth of the population, the demand for autonomous video surveillance systems has substantially increased. Recently, artificial intelligence has played a key role in the development of these systems. In this paper, we present an enhanced autonomous system for object detection and tracking in video streams, tailored for transportation and video surveillance applications. The system comprises two main stages: detection stage; this stage employs you only look once (YOLO)v8m, trained on the KITTI dataset, and is configured to detect only pedestrians and cars. The model achieves an average precision of 97.3% and 87.1% for cars and pedestrians classes respectively, resulting a final mean average precision (mAP) of 92.2%. Tracking stage; the tracking component utilizes the DeepSORT algorithm, which originally incorporates a Kalman filter for motion prediction and performs data association using cosine and Mahalanobis distances to maintain consistent object identifiers across frames. To improve tracking performance, we introduce two key modifications to the original DeepSORT: architecture modification and Kalman filter replacement. The tracking tests are carried out on KITTI and MOTChallenge Benchmarks. The final order tracking accuracy (HOTA) scores achieve 77.645 and 54.019 for Cars and Pedestrians classes respectively in the KITTI-Benchmark and 45.436 for the Pedestrians class in the MOTChallenge-Benchmark.
Volume: 23
Issue: 6
Page: 1729-1742
Publish at: 2025-12-01

Novel fractional order sinusoidal oscillators using operational trans resistance amplifier

10.12928/telkomnika.v23i6.27250
Battula; University College of Engineering Kakinada Tirumala Krishna , Vanitha; GITAM University Kakollu , Manchala; Jawaharlal Nehru Technological University Kakinada Madhusudhan Prasad
The design of fractional order circuits in very large-scale integration (VLSI) domain is gaining the interest of many researchers. At the same time design of fractional circuits using the current mode devices is attracting the research community. In this paper, several possible fractional order sinusoidal oscillators using operational trans resistance amplifier (OTRA) as a basic building block is presented. The necessary condition for the frequency of oscillation and condi tion for oscillations is derived. Fractional order operator sα is the most crucial one to be approximated. In this paper, the fractional order element is approxi mated by the continued fraction expansion (CFE). The approximation is carried out up to fifth order. The circuits are tested with the simulation software named LTspice. The results agree with the theoretical one. The proposed circuits of fers a frequency of 15 MHz, 20 MHz, and 25 MHz which is higher in value as compared to the existing circuits. The proposed circuits finds applications in bio medical, communication circuits.
Volume: 23
Issue: 6
Page: 1635-1645
Publish at: 2025-12-01

Lightning studies on effects on distribution lines: a bibliometric analysis

10.12928/telkomnika.v23i6.26976
Vladimir; Universidad Católica de Manizales Henao - Céspedes , Luis Fernando; Universidad Nacional de Colombia Sede Manizales Díaz - Cadavid
The study of lightning effects on distribution lines is of vital importance for the reliability and safety of electrical systems, as lightning is one of the main causes of failures. The purpose of this study is to perform a bibliometric analysis to evaluate academic productivity trends and research trajectories in this field. The methodology was based on a comprehensive search of the Scopus database, from which a total of 545 articles published between 1932 and 2024 were analyzed. For the analysis, the VOSviewer tool and the Bibliometrix library in R were used. The results reveal a constant increase in productivity since the 1970s, with Japan and China emerging as the most prolific countries. The research has evolved from early theoretical and experimental studies toward the use of advanced computational models and, more recently, the application of machine learning techniques for fault detection. In conclusion, the findings of this study provide a consolidated view of the field, which is fundamental for engineers to be able to design more robust protection systems and to guide future research toward model validation and the integration of renewable energy technologies.
Volume: 23
Issue: 6
Page: 1687-1695
Publish at: 2025-12-01

Prospective classroom teachers’ views on instructional technologies and web-based digital educational tools

10.11591/ijere.v14i6.34918
Görkem Avcı , Elvan Subaşıoğlu
This study examined prospective classroom teachers’ perceptions of instructional technologies and the web-based digital tools they actively use. Using a case study design with semi-structured interviews, data were collected from 15 prospective teachers who had completed an instructional technology course. The findings show that participants strongly emphasized the necessity of technology integration in education. The most commonly used tools included assessment, visual–infographic design, coding, drawing–shaping, augmented and virtual reality, animation, interactive presentations, and artificial intelligence. These tools were found to significantly support effective and efficient learning, enhance motivation, and promote sustainable learning. Accordingly, the study recommends the systematic use of web-based digital tools to support digital transformation in education.
Volume: 14
Issue: 6
Page: 5219-5228
Publish at: 2025-12-01

AI-MG-LEACH: investigation of MG-LEACH in wireless sensor networks energy efficiency applied the advanced algorithm

10.11591/ijece.v15i6.pp5080-5090
Hicham Ouldzira , Alami Essaadoui , Mustapha EL Hanine , Ahmed Mouhsen , Hassane Mes-Adi
Wireless sensor networks (WSNs) play a crucial role in data collection across various fields like environmental monitoring and industrial automation. The energy efficiency of these networks, powered by limited-capacity batteries, is key to their performance. Clustering protocols such as low- energy adaptive clustering hierarchy (LEACH) are widely used to optimize energy consumption. To enhance LEACH’s performance, MG-LEACH was introduced, improving cluster head selection to extend network lifespan. This study compares MG-LEACH with AI-MG-LEACH, which incorporates artificial intelligence (AI) to further improve energy efficiency by selecting cluster heads based on factors like residual energy. Simulations show AI-MG-LEACH reduces energy consumption, extends network life, and enhances data reliability, outperforming MG-LEACH.
Volume: 15
Issue: 6
Page: 5080-5090
Publish at: 2025-12-01

Machine learning-based energy management system for electric vehicles with BLDC motor integration

10.11591/ijpeds.v16.i4.pp2400-2410
K. S. R. Vara Prasad , V. Usha Reddy
This paper proposes a machine learning-based energy management system for electric vehicles with BLDC motor integration. Efficient energy management is essential for improving the performance, range, and reliability of electric vehicles (EVs), particularly those powered by brushless DC (BLDC) motors. Traditional energy management systems (EMS), such as rule-based and fuzzy logic controllers, often lack the adaptability required for dynamic driving conditions and optimal energy distribution. This paper presents a machine learning (ML)-based EMS framework tailored for EVs equipped with BLDC motors, aiming to enhance system responsiveness and energy efficiency. ML algorithms, including decision trees, random forests, support vector machines (SVMs), and XGBoost, are trained on diverse datasets that reflect varying load demands, driving cycles, and battery state-of-charge (SOC) levels. The proposed EMS is modeled and validated in Python programming to simulate realistic EV operating scenarios. Simulation results indicate that the ML-based EMS outperforms conventional methods by achieving up to 15% energy savings, reducing battery stress, and maintaining smoother SOC transitions. These findings highlight the potential of ML-driven strategies for creating adaptive, intelligent EMS solutions in next-generation BLDC motor-based EVs.
Volume: 16
Issue: 4
Page: 2400-2410
Publish at: 2025-12-01

Effect of the angular offset of the stator windings on DSIM performance

10.11591/ijpeds.v16.i4.pp2234-2242
Fatma Lounnas , Salah Haddad
The study outlined in this paper aims to analyze the effect of the different displacement angles between the two stator windings on the performance of a dual stator induction motor, which is a squirrel cage induction motor with two identical windings in its stator. The rated power of each winding is 1.1 kW and fed by an inverter operating with the pulse width modulation technique. The analytical model of the machine is used to analyze its characteristics to investigate the impact of the displacement angles between the two stator windings. A simulation program for the system has been developed using MATLAB/Simulink. Simulation results characterizing the comportment of this machine for different displacement angles of the stator windings show that the torque pulsations are noticeably lower at 30° shift than in the other two scenarios of 0° and 60°, the model exhibits noteworthy performances at this shift. The torque pulsations are noticeably lower at 30° shift than in the other two scenarios of 0° and 60°, and the model exhibits noteworthy performance at this shift. In this case, there are also reduced rotor current ripples, which decrease rotor heating. Despite this, the harmonics increased the peak stator phase currents for a 30° electrical offset.
Volume: 16
Issue: 4
Page: 2234-2242
Publish at: 2025-12-01

The effectiveness of bentonite in reducing soil resistance in acidic water swampland

10.12928/telkomnika.v23i6.27094
Dian; Universitas Sriwijaya Eka Putra , Muhammad; Sriwijaya University Irfan Jambak , Zainuddin; Sriwijaya University Nawawi
This study aims to evaluate the effectiveness of bentonite mixtures in reducing grounding resistance in acidic swampy areas. The method used is an experiment comparing resistance before and after the addition of bentonite in various compositions (25%, 50%, 75%, and 100%), supplemented with linear regression analysis. The results showed that bentonite significantly reduced soil resistance in three types of electrodes: iron rebar, copper-coated iron, and galvanised iron. The highest reduction in resistance was achieved in iron rebar electrodes, from 35.93 Ω to 22.46 Ω (a 37% reduction) with the addition of 25% bentonite. Linear regression analysis showed a consistent negative relationship between the percentage of bentonite and grounding resistance, with a coefficient of determination (R²) varying between 26.40% and 73.39%. These findings indicate that bentonite is effective as a natural grounding material in acidic swampy areas. This research makes an important contribution to the development of more efficient and safer electrical systems in swampy areas and challenging environments, while also supporting the use of natural materials to reduce dependence on synthetic chemicals.
Volume: 23
Issue: 6
Page: 1657-1665
Publish at: 2025-12-01

Design and simulation of an electric vehicle charging system with battery arrangement and control parameters optimization

10.11591/ijpeds.v16.i4.pp2521-2537
Nurmiati Pasra , Faizal Arya Samman , Andani Achmad , Yusran Yusran
The development of electric vehicle (EV) charging technology requires efficient, reliable, and economical systems to address users' concerns about battery drain. This study presents a simplification of EV charger design with an isolated model and optimal battery mode setting. The research method integrates step-up Y-Δ transformers, AC-DC converters, boost DC-DC converters, integral proportional control, and battery configurations. Series (S) - parallel (P) - series (S) battery arrangement pattern to maximize system performance. The test results using a 130 mF capacitor with the S40-P2-S6 and S80-P2-S3 array patterns produced an output voltage of 946 V, while the S100-P2-S3 array pattern achieved an output voltage of 1,182 V. The system is capable of fast charging with a time of 0.2 to 2 hours for a battery capacity of 30 to 100 kWh at a charging power of 50 to 150 kW with an efficiency of up to 97%. The combination of the use of an isolated model on the charger array and the EV battery setting pattern is proven to produce stable voltage values with minimal overshoot levels, thus addressing the complex charger design challenges and battery setting needs in the 800 to 1,100 V voltage range.
Volume: 16
Issue: 4
Page: 2521-2537
Publish at: 2025-12-01

Dehydration of Moringa leaves using microcontroller and IoT controlled electrical dryer

10.11591/ijpeds.v16.i4.pp2688-2698
Saifuddin Muhammad Jalil , Abubakar Dabet , Syarifah Akmal , Selamat Meliala , Muhammad Muhammad
The dehydration of Moringa Oleifera leaves is crucial to preserving their high nutritional value and extending shelf life for use in food and pharmaceutical applications. Traditional drying methods often result in nutrient degradation and lack precise environmental control. This study presents the design and implementation of an internet of things (IoT)- enabled electrical dryer system controlled by a microcontroller for the efficient dehydration of Moringa leaves. The system integrates temperature and humidity sensors, an Arduino Mega microcontroller, and a web-based interface for real-time monitoring and control. The electrical dryer maintains optimal drying conditions, significantly reducing moisture content while preserving essential nutrients. Data is logged and visualized through IoT connectivity, allowing for remote access and performance analysis. The dehydration of Moringa leaves requires approximately one kg of electricity for batteries in dual-energy dryers, which are based on microcontrollers and the IoT. The results demonstrate that the proposed system offers a reliable, energy-efficient, and scalable solution for the controlled dehydration of Moringa leaves, with potential applications in smart agriculture and postharvest processing. The excellent drying time is achieved in a greenhouse dryer, which maintains a temperature of 45 °C within the drying chamber, resulting in a median drying time of 6 hours. The standard moisture percentage of clean and dry Moringa leaves is measured at 18.5% (wb) and 8% (wb), respectively.
Volume: 16
Issue: 4
Page: 2688-2698
Publish at: 2025-12-01
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