Articles

Access the latest knowledge in applied science, electrical engineering, computer science and information technology, education, and health.

Advanced Search
Filter Icon

Filters article

Years

FAQ Arrow
Single Year
Range Year
0
0

Source Title

FAQ Arrow

Authors

FAQ Arrow

31,456 Article Results

Optimization of renewable energy-based electrical systems on tourist ships in Labuan Bajo

10.11591/ijpeds.v16.i2.pp1306-1313
I Made Aditya Nugraha , I Gusti Made Ngurah Desnanjaya
The use of fossil fuels on tourist boats in Labuan Bajo poses challenges in the form of high operational costs and significant environmental impacts. This study aims to optimize the renewable energy-based electrical system by utilizing a hybrid photovoltaic and generator system on tourist boats. The methods used include simulation and technical, economic, and socio-cultural analysis to evaluate the feasibility and efficiency of the system. The results of the study show that technically, the hybrid photovoltaic (PV)-generator system is able to improve energy efficiency and reliability of electricity supply, especially in dealing with fluctuations in power needs. From an economic aspect, this system has been proven to reduce fossil fuel consumption by up to 40%, which has an impact on long-term operational cost savings, even though the initial investment is quite high. Socio-culturally, the implementation of this system supports sustainability values and provides a positive image for the tourism industry in Labuan Bajo as an environmentally friendly destination. The use of a hybrid PV-generator system is an innovative and sustainable solution for tourist boats in Labuan Bajo, which not only improves technical efficiency and economic benefits but also supports environmental conservation and sustainability-based tourism.
Volume: 16
Issue: 2
Page: 1306-1313
Publish at: 2025-06-01

E-waste management in higher education institutions: insights and policy recommendations

10.11591/ijphs.v14i2.25020
Fredelino A. Galleto Jr. , Maricel G. Dayaday , Frediezel G. De Leon
Electronic waste disposal is a primary concern both on a national and global spectrum. The increased usage of information and communication technology and electronic devices among higher education institutions (HEIs) contributes to the annual generation of e-waste. HEIs are called to implement a sustainable scheme to curtail the environmental and public health threats brought by e-waste. Against this background, the recycling strategies of HEIs for discarded electronics were examined and evaluated as to its effectiveness and used as basis to develop policy recommendations for e-waste management. The interventions developed were met with general approval and positive response. The innovative products were perceived to be useful in serving their new purposes and reducing the problems of e-waste in HEIs. These findings provide valuable input for HEIs seeking to enhance their e-waste recycling practices. Existing legislation concerning e-waste was looked into, and policy recommendations that encouraged cooperation and shared accountability among key players and stakeholders were drawn up.
Volume: 14
Issue: 2
Page: 919-926
Publish at: 2025-06-01

Harmonic reduction in power grids: implementing a four-legged multilevel inverter as an active power filter using model predictive control

10.11591/ijpeds.v16.i2.pp922-935
Asep Andang , Firmansyah Maulana Nursuwars , Andri Ulus Rahayu , Imam Taufiqurrahman , Ervan Paryono
This study explores the implementation of a five-level cascaded three-phase four-wire inverter as an active power filter to mitigate harmonics in power grids. Harmonic components in the load current are transformed and filtered to create a reference current, which serves as the foundation for designing the inverter’s switching pattern. The predicted current, generated through circuit modeling, is compared with the reference current using the model predictive control (MPC) method. The accuracy of this approach is evaluated using a cost function that measures the difference between the predicted and reference currents. Simulation results reveal that the application of the hybrid power filter can effectively suppress harmonics, reducing the total harmonic distortion (THD) to below 5%, thereby meeting power quality standards. Furthermore, it addresses load imbalances, ensuring that the phase currents at the source remain nearly equal. Additionally, the hybrid power filter significantly decreases the neutral current, reducing it to just one-tenth of its original value. While MPC has demonstrated its effectiveness in controlling power converters and multilevel inverters, its application to active power filters remains underexplored. This study investigates the potential of a four-legged multilevel inverter with MPC to enhance power quality by reducing harmonics in three-phase four wire systems.
Volume: 16
Issue: 2
Page: 922-935
Publish at: 2025-06-01

A single-stage constant-power and optimal-efficiency double-sided LCC wireless battery charger

10.11591/ijpeds.v16.i2.pp1409-1416
Jiabo Yan , Mohd Junaidi Bin Abdul Aziz , Nik Rumzi Nik Idris , Tole Sutikno
This article proposes a novel single-stage double-sided LCC (DS-LCC) constant power (CP) wireless battery charger. The proposed CP charger uses a closedloop control in the secondary side with the active rectifier to make the DS-LCC charger achieve CP charging and optimal efficiency. Compared to previous work, the proposed CP wireless power transfer system does not involve any switch-controlled capacitor (SCC), does not require wireless communication, and can achieve optimal efficiency throughout the charging process. The proposed charger reduces cost and system complexity while improving efficiency. The proposed wireless charger is validated by simulation, and the efficiency remains between 94.44% and 94.52%, surpassing the previous work.
Volume: 16
Issue: 2
Page: 1409-1416
Publish at: 2025-06-01

Energy saving of variable frequency drive in dust collector fan motors in the smelting process at the steel industry

10.11591/ijpeds.v16.i2.pp1399-1408
Sarwo Turinno , Mochammad Facta , Cahyadi Cahyadi
The dust removal system is a crucial component in the steel industry, designed to eliminate dust and gas generated during the smelting process. Its primary purpose is to prevent personnel in the surrounding area from inhaling harmful dust particles. A dust collector system is used to carry out this process before being removed from the chimney to the outside air. In the operation of the dust collector, there is still limited attention given to optimizing its operation to meet the needs of its load, where the dust collector still operates at maximum capacity continuously when the dust load decreases due to the smelting process, in an idle state. Setting the rotational speed of the fan motor to produce an airflow rate as required using a variable frequency drive (VFD). The Motor speed was varied in low and high conditions at 322 rpm and 879 rpm. The research results showed that the average airflow rate for the speed of 322 rpm was 150,326 m³/h, and it has 384.193 m³/h at the speed of 879 rpm. The energy savings obtained from the application of VFD to control the airflow rate value are 1,253,544 kWh/year, and the cost savings obtained are IDR 1,249,457,447 per year.
Volume: 16
Issue: 2
Page: 1399-1408
Publish at: 2025-06-01

Optimizing chest X-rays as a leading diagnostic modality for handling COVID-19: a diagnostic study

10.11591/ijphs.v14i2.24653
Utami Purbasari , Nurhayati Adnan Prihartono , Helda Helda , Budhi Antariksa , Fatira R. Audita
Recent studies have highlighted that chest CT scans are crucial for accurately diagnosing COVID-19. However, in rural areas of Indonesia, people may have difficulty assessing CT scans, leading to increased undetected cases. To address this issue, we investigated whether chest X-rays (CXR) could replace CT scans in diagnosing COVID-19 patients. A diagnostic cross-sectional-based study was conducted at Fatmawati General Hospital from January to September 2021. The study included suspected COVID-19 patients in isolation wards and ICU who were over 18, with or without comorbidities, and had complete clinical data and laboratory tests. We analyzed imaging data through reverse transcription-polymerase chain reaction (RT-PCR) tests, CXR, and chest CT scans. This study enrolled 150 eligible patients. With RT-PCR as the gold standard, we found that CXR had a sensitivity of 86.6% (95% CI: 78.9-92.3%) and chest CT scan had a sensitivity of 91.1% (95% CI: 84.2-95.6%). Similar performance was observed when detecting ground glass opacities (GGO), bilateral laterobasal, and influenza-like syndrome and dyspnea (ILI) between CXR and CT scans. Receiver operating characteristic (ROC) curves demonstrated that CXR is comparable to CT scan, especially in ground glass opacity (GGO) and consolidation (AUC=0.72; 95% CI: 0.61-0.83 and AUC=0.710; 95% CI: 0.64-0.78). The proposed CXR method can be a reliable primary imaging tool for diagnosing COVID-19 by considering ILI. However, chest CT scans remain the most effective diagnostic method for COVID-19. These findings may be useful for the utilization of CXR for diagnosing COVID-19 in areas with limited access to CT scans.
Volume: 14
Issue: 2
Page: 799-807
Publish at: 2025-06-01

The influence of social media on Greek mothers’ attitudes and knowledge on breastfeeding

10.11591/ijphs.v14i2.24707
Katerina Mila , Eleni Tympa , Vasiliki Karavida
Recently, maternal breastfeeding in Greece has shown a positive trend. However, breastfeeding rates in Greece still lag behind those of other European countries. The participants of this quantitative study were recruited via social media and by personal connections. Data were gathered through questionnaire and analyzed utilizing descriptive statistics with SPSS 20. The study investigates: i) Trust levels among Greek mothers in social groups and their awareness of breastfeeding issues. ii) The impact of active participation in Greek parenting and breastfeeding support groups on Facebook on choosing and sustaining exclusive breastfeeding. iii) Whether engagement in social media groups positively influences the duration of exclusive breastfeeding and extends the overall breastfeeding period for infants. Out of the 776 participants, 727 were part of social media parenting groups. About 27.9% credited these groups for influencing their decision to breastfeed. Moreover, they perceived significant assistance from social media in staying well-informed about breastfeeding. The data collected confirms social media parenting groups positively influence breastfeeding mothers, enhancing knowledge, self-confidence, and deterring negative attitudes. This factor increases the likelihood of sustaining exclusive breastfeeding up to the recommended six months.
Volume: 14
Issue: 2
Page: 652-660
Publish at: 2025-06-01

System-on-chip design for improved switching angle driven 35-level LUO progression-based multi-level inverter

10.11591/ijpeds.v16.i2.pp974-981
Joseph Anthony Prathap , J. Kanti Prasad , Vivekananda Reddy , Chinthapalli Suheil
This article concentrates on the development of the IC layout for the driving switches of the inverter with improved switching control. This work uses the improved non-carrier switching pattern algorithms to have precise control of inverter switches with twin objectives of i) reducing the total harmonic distortion (THD)% and ii) developing a dedicated system on chip for the improved switching control of the 35-level switched ladder multi-level inverter. The DC voltage of the inputs to the inverter is designated based on the LUO progression, which consists of an improved mathematical formula for deriving its values. Conventionally, the multi-level inverter circuits are driven by the pulse width modulation signals by overlapping the modulating sine wave with different levels of triangle waves, such as phase disposition, phase opposite disposition, and alternate phase opposite disposition, utilized to drive various voltage source inverter topologies. Although the MLI design concentrates on minimal THD%, factors like accuracy, minimum number of switches, and cost demands for advanced switching strategy algorithms. This paper compares the improved switching angle method to the existing algorithm by considering VPEAK, VRMS, and %THD for the 35-level LUO progression-based switched ladder inverter. The IC layout for the improved switching control is developed using the hardware description language code in the Cadence tool and validated by cross-compiling in Simulink MATLAB.
Volume: 16
Issue: 2
Page: 974-981
Publish at: 2025-06-01

Stress, stressors, and stress management practices among public-school teachers

10.11591/ijphs.v14i2.24869
Jonathan Lapuz Mañas , Roel Sanchez Ang
Stress manifests differently among individuals in various circumstances, stemming from multiple sources. Teachers, in particular, encounter many stressors from personal and work-related domains. This study examines the stress levels of elementary, junior high school, and senior high school public school teachers within Congressional District IV of the Division Office of Nueva Ecija, focusing on everyday life stressors. Additionally, it investigates the stress management practices they employ for coping. The personal metrics of these teachers were analyzed to ascertain their significant relationship with stress levels. Data were randomly collected from 273 respondents through a questionnaire developed by Villamayor. The study unveils that public-school teacher experience slight stress levels and utilize diverse stress management techniques to tackle these stressors. However, the personal metrics of respondents were found to have an insignificant relationship with their stress levels. Nevertheless, the findings of this study pave the way for developing a comprehensive stress management plan to assist public school teachers.
Volume: 14
Issue: 2
Page: 818-826
Publish at: 2025-06-01

Electricity generation and multi-purpose applications from biogas and biomethane

10.11591/ijpeds.v16.i2.pp1325-1340
Moses Jeremiah Barasa Kabeyi , Joseph Akpan , Oludolapo Akanni Olanrewaju
Biogas produced from biomass is a renewable energy resource with high value potential to support sustainable development. This study presents abridged advances and pathways from biogas and biomethane to electricity with opportunities and challenges in generation, conversion, and storage needed for use in many areas like transportation, power generation and storage, building, and industrial heat production sectors. A high knock resistance, making it suitable for use in thermal systems with high compression rate, characterizes biogas combustion. Various prime movers using biogas as fuel can be used for electricity generation, including direct conversion through fuel cells, which is a significant pathway to sustainable energy storage. Biogas to electricity conversion by a generator set is much more practical today. Turbines, micro turbines, Stirling engines, diesel engines, and petrol engines are only some of the viable possibilities for converting biogas to electricity. Biomethane can be used as a substitute for natural gas in all its applications with little or no modifications to the fuel infrastructure. Finally, this study discusses biogas and biomethane’s limits and contribution to the Sustainable Development Goals 2, 6, 7, 8, 9, 11, 13, 14, and 17.
Volume: 16
Issue: 2
Page: 1325-1340
Publish at: 2025-06-01

Assessment of thermal characteristics in diverse lithium-ion battery enclosures and their influence on battery performance

10.11591/ijape.v14.i2.pp275-281
Mahiban Lindsay , M. Emimal
Battery technology is an emerging research domain within the automotive sector, with a focus on various battery chemistries such as Li-ion, LiFePO4, NMC, and NaCl, as well as specialized cells like LiSOCl2. These chemistries are crucial in advancing electric vehicle (EV) battery technology. Batteries are available in different packaging formats, including prismatic, cylindrical, and pouch designs, each tailored to diverse operational environments. This study investigates the impact of these various battery packages on overall battery performance. Additionally, it assesses the influence of temperature on battery efficiency, aiming to identify the optimal temperature range for maximum performance. A significant part of the research focuses on the development of efficient battery thermal management (BTM) systems, which are designed to control and maintain battery temperature within the desired range, thereby enhancing efficiency. The outcomes of this study provide valuable insights for improving the reliability and efficiency of EV batteries. These findings are crucial for ensuring optimal battery performance and safety across different field conditions. Automotive manufacturers and battery suppliers can leverage these insights to refine their product designs, ensuring the dependability and safety of EV batteries. By enhancing battery performance through improved packaging and effective thermal management, this research contributes significantly to the advancement of EV technology, making electric vehicles more reliable and efficient for consumers.
Volume: 14
Issue: 2
Page: 275-281
Publish at: 2025-06-01

Torque ripples reduction and speed control of a switched reluctance motor based on artificial intelligence techniques

10.11591/ijpeds.v16.i2.pp936-948
Rady Farouk Soliman , Mahmoud Ramadan Ahmed , Soliman Mabrouk Sharaf
This paper proposes a technique for reducing torque ripples and speed control of switched reluctance motor (SRM) using artificial intelligence. The controller of SRM is developed based on a fuzzy logic controller using MATLAB/Simulink software. Fuzzy logic controller overcomes the nonlinearity and uncertainty of the SRM. The proposed controller is used for predicting torque ripples and speed control profiles. The machine performance using the proposed controller is compared with using a traditional PI controller. In addition, comparison of motor performance with and without the use of proposed controllers is highlighted. The motor performance is evaluated using the suggested different controllers. The simulation results show that the proposed method indicates a 65% to 75% reduction in torque ripples compared to the traditional PI method.
Volume: 16
Issue: 2
Page: 936-948
Publish at: 2025-06-01

Voltage profile enhancement in grid system using expert system

10.11591/ijape.v14.i2.pp449-458
G. Sathish Goud , R. Senthil Kumar
Frequent and severe blackouts are been attributed to insufficient voltage stability, resulting in voltage collapse. To mitigate this issue and ensure adequate voltage stability and damping in power systems, this study explores smart grid solutions. The proposed control strategies are applied to a distribution static synchronous compensator (DSTATCOM) within a multi-machine system. The recommended approach, radial basis function neural network (RBFNN)-DSTATCOM with support vector machine (SVM), incorporates a PI controller to minimize system deviations. The damping performance of the RBFNN-DSTATCOM controller is analyzed against a fixed-parameter proportional-integral (PI)-DSTATCOM controller. Simulation analysis indicates that the proposed RBFNN-DSTATCOM controller effectively enhances power system stability under various disturbances and operating conditions. Critical bus graphs are provided for scenarios both with and without the DSTATCOM. A parametric evaluation is conducted using the 'powergui' toolbox based on the system's standard ratings. Finally, a comparative analysis is presented, utilizing the results from both systems, with all graphs plotted against time using the power system analysis toolbox (PSAT) in MATLAB.
Volume: 14
Issue: 2
Page: 449-458
Publish at: 2025-06-01

Optimal placement of DGs in a multi-feed radial distribution system using actor-critic learning algorithm

10.11591/ijape.v14.i2.pp319-327
Neelakanteshwar Rao Battu , Surender Reddy Salkuti
Multi-feed radial distribution systems are used to reduce the losses in the system using reconfiguration techniques. Reconfiguration can reduce the losses in the system only to a certain extent. Introduction of distributed generators has vastly improved the performance of distribution systems. Distributed generators can be used for reduction of loss, the improvement of the voltage profile, and reliability enhancement. Distribution generators play a vital role in reducing the losses in the distribution system. Placement of distributed generators in a multifeed system is a complex task to be solved using classical optimization methods. Classical optimization techniques may sometimes fail to provide a converged solution. Installation of distributed generators at suitable locations in a multi-feed system is found in this paper using the actor-critic learning algorithm. Actorcritic learning approach uses temporal difference error as a signal in making judgements regarding actions to be taken for future states in accordance with rewards that have been obtained by applying the present policy. The approach is applied to a standard 16-bus distribution system for reduction of system losses, and the results are discussed.
Volume: 14
Issue: 2
Page: 319-327
Publish at: 2025-06-01

Design a novel SSSC based FOPID controller for the hybrid PV-DFIG-based system to enhance transient stability and dampen power oscillations

10.11591/ijpeds.v16.i2.pp1368-1375
Chethan Hiremarali Ramalingegowda , Mageshvaran Rudramoorthy , K. M. Mahesh Kumar
The integration of photovoltaic (PV) and wind energy systems is becoming increasingly significant in the modern energy sector. Among various technologies, doubly fed induction generator (DFIG)-based wind power systems are extensively utilized due to their superior power control capabilities. Conventional control strategies, such as proportional-integral (PI) controllers, are commonly implemented to stabilize system waveforms. However, recent advancements highlight the potential for improved oscillation damping through optimized controller designs. This paper introduces an optimal fractional-order proportionalintegral-derivative (FOPID) controller integrated with a static synchronous series compensator (SSSC) to enhance power system stability. The proposed approach incorporates the dynamic characteristics of a wind energy conversion system (WECS) connected to an infinite grid. A detailed WECS model is developed to assess the effectiveness and robustness of the proposed controller in mitigating power oscillations, particularly under varying wind conditions. The proposed FOPID controller offers enhanced flexibility for parameter tuning, enabling precise damping of power oscillations, and presents a significant advancement over traditional wind turbine systems based on permanent magnet synchronous machines (PMSM).
Volume: 16
Issue: 2
Page: 1368-1375
Publish at: 2025-06-01
1 2 3
...
2097 2098
Show 303 of 2098

Discover Our Library

Embark on a journey through our expansive collection of articles and let curiosity lead your path to innovation.

Explore Now
Library 3D Ilustration