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29,939 Article Results

Internet of things based seasonal auto regression integrated moving average model for hydroponic water quality prediction

10.11591/ijaas.v14.i1.pp123-131
April Firman Daru , Susanto Susanto , Whisnumurti Adhiwibowo , Alauddin Maulana Hirzan
Technological progress significantly impacts agriculture, with the rapid expansion of industrial and residential areas leading to a scarcity of agricultural land. Modern farming techniques like hydroponics have emerged as a solution, allowing plant growth with water as a medium. Real-time monitoring of water quality is crucial for hydroponic systems. Lettuce (Lactuca sativa) is particularly compatible with hydroponics due to its short growth cycle and nutritional value. Key factors for successful cultivation include maintaining pH, temperature, and nutrient levels within optimal ranges. To address water quality monitoring complexities, internet of things (IoT) technology offers a promising solution. IoT devices autonomously gather environmental metrics such as temperature, pH, humidity, and nutrient concentrations. This study integrates an IoT-driven hydroponic water quality monitoring system using the seasonal auto-regressive integrated moving average (SARIMA) algorithm and the ESP32 microcontroller. This approach allows real-time water quality management, enhancing lettuce cultivation efficiency and productivity. The proposed model achieved 98.6% accuracy, effectively predicting water quality.
Volume: 14
Issue: 1
Page: 123-131
Publish at: 2025-03-01

Performance analysis of conventional multilevel inverter driven PMSM drive in EV applications

10.11591/ijape.v14.i1.pp37-45
Rakesh G. Shriwastava , Pravin B. Pokle , Ajay M. Mendhe , Nitin Dhote , Rajendra M. Rewatkar , Rahul Mapari , Ranjit Dhunde , Hemant R. Bhagat Patil , Ramesh Pawase
This paper describes the simulation and hardware analysis of a two-level inverter-driven permanent magnet synchronous motor (PMSM) drive in EV applications. The design of various sections of PMSM Drive is discussed in detail. This proposed work is based on the voltage source converter (VSC) fed four-pole, 373 W. This paper highlights the design and implementation using a microcontroller of (PMSM) drive for various operating conditions. The experimental results show that the control and power circuit used in the design can achieve excellent and consistent speed performance. The performance along with test results of the speed and load variation of the PMSM drive is studied for steady-state conditions. The performance of the motor has been checked by increasing the inverter frequency with the speed of the motor and also keeping the frequency remains constant by varying the load and speed. Hardware analysis indicates the improved performance of the motor and the drive. It has good speed and torque responses and is suitable for EPS applications.
Volume: 14
Issue: 1
Page: 37-45
Publish at: 2025-03-01

Kinetic study of biogas production from anaerobically digested rice straw

10.11591/ijaas.v14.i1.pp247-254
Maninder Kaur , Sandeep Dhundhara
Rising concern about environmental protection has demanded prompt researchers’ attention towards alternative renewable energy sources. Thus, biofuel production with biodegradation of crop straws through anaerobic digestion has attracted the attention of the scientific community. However, the lignocellulosic nature of rice straw poses resistance to its disintegration through anaerobic digestion. Aiming to optimize the concentration of sodium hydroxide pretreatment of rice straw for efficient biogas production this study was conducted. For this purpose, the pretreatment was done on rice straw with different concentrations of sodium hydroxide at about 25 °C temperature for 24 hours before subjecting it to anaerobic digestion for biogas production. The 6% sodium hydroxide pretreated rice straw was observed to be resulting in the highest cumulative biogas production which was found to be 56.3% higher than untreated rice straw. In the kinetic study of biogas production, 6% NaOH pretreated rice straw shows the highest biogas production potential at the highest rate of 15.8496 ml/day with a minimum lag period of 0.6758. The experimental study and kinetic study results represent that 6% NaOH pretreated rice straw has the highest biogas production.
Volume: 14
Issue: 1
Page: 247-254
Publish at: 2025-03-01

Technological readiness and business performance: the mediating effect of social media marketing

10.11591/ijaas.v14.i1.pp143-150
Sabri Shaker Ashoor Bin-Obaidellah , Noor Fadhiha Mokhtar , Safiek Mokhlis , Nur Aishah Awi
Understanding employee readiness towards adopting online marketing platforms is paramount in today’s digital economy, as it directly influences the effectiveness and competitiveness of businesses. This study investigates the relationship between employee technological readiness (ETR) and the business performance of micro and small enterprises (MSEs) in developing economies, focusing on data from Yemen. Drawing on the resource-based view theory, the study examined how adopting social media marketing (SMM) mediates this relationship. Data was collected from 362 managers/owners of MSEs in Yemen. The relationship between ETR, SMM, and business performance was examined using partial least squares structural equation modeling. The results show that ETR significantly influences SMM adoption, which impacts the business performance of MSEs. In addition, the study reveals that the relationship between ETR and business performance is partially mediated by SMM adoption. This finding highlights the critical role of employees’ readiness for technological advancements in facilitating effective SMM adoption, thereby contributing to the sustainability and success of MSEs.
Volume: 14
Issue: 1
Page: 143-150
Publish at: 2025-03-01

Earthquake epicenter prediction from the Java-Bali radon gas telemonitoring station using machine learning

10.11591/ijaas.v14.i1.pp39-45
Christophorus Arga Putranto , Sunarno Sunarno , Faridah Faridah , Thomas Oka Pratama
Predicting the location of earthquake epicenters is a critical aspect of earthquake forecasting, as it complements efforts to determine the time and magnitude of seismic events. This research addresses the challenge posed by the uncertainty in epicenter locations, particularly along the extensive plate faults of Indo-Australia and Eurasia. In these regions, effective earthquake prediction is compromised without accurate epicenter information, impeding mitigation strategies and complicating disaster impact estimation. The primary objective of this study is to devise an algorithm for forecasting earthquake epicenter locations by harnessing variations in radon gas concentrations on southern Java Island, Indonesia, as a predictive precursor. Using a supervised machine learning approach, this study integrates radon gas concentration data to predict the distance between a radon gas telemonitoring station and the impending earthquake epicenter. Three distinct machine learning algorithms were evaluated using data from six Java-Bali radon gas telemonitoring stations within an early warning system. The random forest algorithm emerged as the most effective, yielding an average root mean square error of 453.10 kilometers. The findings of this research significantly contribute to earthquake risk mitigation efforts. This work enhances our capability to anticipate seismic events, and more effective disaster preparedness and response strategies in earthquake-prone regions.
Volume: 14
Issue: 1
Page: 39-45
Publish at: 2025-03-01

Characterization fine grained low alloy steel 22 NiMoCr 3 7 by magnetic Barkhausen noise analysis

10.11591/ijaas.v14.i1.pp209-217
May Isnan , Gilang Cempaka Kusuma , Hamdani Hamdani , Imam Sudasri , Asep Kurnia , Hanif Muzhaffar Rafi , Andhika Putra
To ensure the quality of mass-produced products, non-destructive material testing (NDT) is required with a method that has high testing speed and accuracy. Products that have undergone heat treatment such as automotive components to obtain a specific hardness value need to be tested to ensure the desired quality. Some parameters such as coercivity and permeability of the ferromagnetic materials, can be used to characterize the shape of the hysteresis curve. The hysteresis curve geometry is related to mechanical hardness, hot working record, and the presence of residual stresses. This paper will present how the coercivity value measurement can be done using the Barkhausen effect, as well as a study of the correlation between the coercivity value and the hardness of a ferromagnetic material using the regression analysis method. Indentation testing has also been done to verify different approaches to obtain hardness value by Barkhausen noise analysis. The research shows that this technique was sufficiently accurate with superior rapid testing and no indentation mark.
Volume: 14
Issue: 1
Page: 209-217
Publish at: 2025-03-01

Development of antioxidative edible film from red dragon fruit peel extract with the addition of CMC and soy protein isolate

10.11591/ijaas.v14.i1.pp164-174
Triana Lindriati , Sih Yuwanti , Asmak Afriliana , Aji Sukoco , Ivan Rivaldy Budianto , Wafiq Azizah , Umrotus Shofiyatul Fadhiyah
The red dragon fruit peels (RDFP) have a high content of pectin and total phenolic compounds. This research studied the development of RDFP be an antioxidative edible film. The RDFP was extracted by microwave to obtain high pectin and polyphenol content, and then the red dragon fruit peel extract (RDFPE) was used as a based material. The RDFPE was added with 5% (w/v) of carboxymethyl cellulose (CMC) and 10% (w/v) of soy protein isolate (SPI) to increase their tensile strength. The result showed that RDFPE potential to develop as an antioxidative edible film. There are different effects of CMC and SPI. The addition of CMC had a positive effect on total polyphenol and antioxidant properties but SPI had a negative effect. Against the peroxide number of peanut oils, all RDFPE films can inhibit. The effect of CMC and SPI on physical and mechanical properties were increasing thickness, and tensile strength decreasing transparency, solubility, also elongation. The FTIR showed a difference in macromolecule interaction between RDFPE with CMC and SPI. The interaction between RDFPE with CMC occurred with pectin while SPI interacted both with pectin and polyphenol. Thus, macromolecule interaction affected on physical, mechanical, and antioxidative properties of RDFPE edible films, and revealed that CMC was more suitable to add to RDFPE edible film.
Volume: 14
Issue: 1
Page: 164-174
Publish at: 2025-03-01

Design and control of a grid-connected solar-wind hybrid sustainable energy generation systems using DFIG

10.11591/ijape.v14.i1.pp188-201
G. B. Arjun Kumar , M. Balamurugan , K. N. Sunil Kumar , Ravi Gatti
An optimal control of a grid-connected solar-wind hybrid scheme for the electricity generation system by utilizing both wind and solar renewable energy in a remote region that is inaccessible to the electricity grid. The control and assessment of a hybrid sustainable energy generation system power system that supplies three-phase, four-line loads as well as a battery array are presented in this research work. Wind energy conversion system (WECS) is comprised of a doubly-fed induction generator (DFIG) and two pulse width modulation (PWM) voltage source converters, namely the grid side converter (GSC) and the rotor side converter (RSC), which are linked together via a DC-link and are equipped with a technique for maximum power point tracking (MPPT). The grid voltage-oriented control strategy is employed to provide a consistent DC-bus voltage for the GSC and to regulate the reactive power on the power grid. Even the difference in voltage and frequency can be controlled with this novel strategy. The stator voltage-oriented vector technique is designed in the RSC control strategy, resulting in effective regulation of reactive and active power at the stator as well as an MPPT obtained by controlling the optimal torque. The hybrid sustainable energy generating system (HSEGS) simulation model is designed to have a capacity of 5 kW, and its efficiency is evaluated using the MATLAB/ Simulink platform and demonstrated in a variety of circumstances.
Volume: 14
Issue: 1
Page: 188-201
Publish at: 2025-03-01

High order sliding mode control for grid integration of photovoltaic systems

10.11591/ijape.v14.i1.pp118-126
Noureddine Ech-cherki , Oumaima Echab , Youssef Errami , Abdellatif Obbadi , Smail Sahnoun , Mohssin Aoutoul
The article suggests employing second-order sliding mode control (SOSMC) to manage photovoltaic systems (PVS) connected to the electrical grid. These systems face complexities due to non-linearities, variability, uncertainties, disturbances, and climate changes. The proposed control strategy utilizes two converters: one at the photovoltaic generator (PVG) side for maximum power point tracking (MPPT) to optimize energy generation and another at the grid connection point to regulate power injection into the grid and maintain the DC bus voltage (Vdc) while achieving unit power factor (UPF). Both converters are equipped with SOSMC controllers, enabling independent adjustment of active (P) and reactive (Q) power. This approach aims to enhance the energy efficiency and robustness of PVS under varying climatic conditions. The performance of the system is evaluated under standard and variable irradiation conditions using the MATLAB/Simulink environment. Simulation results indicate that SOSMC significantly improves system performance and efficiency compared to conventional vector control (CVC). Notably, it reduces active power overshoot by 100%, decreases Vdc response time, and lowers total harmonic distortion (THD) of the current to 1.19%, demonstrating its effectiveness across different irradiation levels.
Volume: 14
Issue: 1
Page: 118-126
Publish at: 2025-03-01

Domestic wastewater treatment system using waste plastic bottle caps as biofilter media

10.11591/ijaas.v14.i1.pp235-246
Muliyadi Muliyadi , Purwanto Purwanto , Sri Sumiyati , Budiyono Budiyono , Sudarno Utomo , Budi Warsito
The increasing lack of clean water has created a paradigm for treating wastewater directly from the source. This study aimed to determine the effectiveness of processing domestic waste using plastic bottle caps in the anaerobe and aerobe reactor system by measuring several key parameters in wastewater. Experimental study on on-site wastewater treatment system using two bioreactors, a biodegradation made from fruit and vegetable peel waste, and local microorganisms. Domestic wastewater was used in this study. The wastewater treatment system's performance was monitored using parameters like pH, temperature, total suspended solids (TSS), chemical oxygen demand (COD), and biochemical oxygen demand (BOD), collected daily at 9 am during peak wastewater generation. The wastewater treatment system using aerobe and anaerobic reactors with plastic bottle cap media and microorganism biodegradation effectively reduced the TSS, COD, and BOD. The anaerobe reactors were more effective at removing these pollutants, with a maximum TSS reduction of 81.1%, COD removal efficiency of 90.1%, and BOD removal efficiency of 80.2%. The longer acclimatization time of the anaerobe reactor may make it more efficient after acclimatization compared to the aerobe reactor. Although the anaerobe reactor may require a longer acclimatization time, it ultimately results in a higher efficiency in terms of TSS, COD, and BOD reduction compared to the aerobe reactor.
Volume: 14
Issue: 1
Page: 235-246
Publish at: 2025-03-01

Betta fish species classification using light weight deep learning algorithm

10.11591/ijaas.v14.i1.pp28-38
Danishah Hana Muhammad Muhaimin Lim , Norizan Mat Diah , Zaidah Ibrahim , Zolidah Kasiran
Betta fish sellers and breeders often face challenges in accurately identifying Betta fish species due to variations in colors, patterns, and shapes, leading to potential financial losses and deceptive transactions. To address this issue, we developed a mobile application that employs MobileNet, a deep learning (DL) technique, to classify Betta fish species. The dataset, acquired from online stores, comprises 400 images, with 100 images representing each of the four studied Betta fish species: comb tail, delta tail, spade tail, and veil tail. Prior to model implementation, the dataset undergoes pre-processing with data augmentation techniques, including rotation, shear, zoom-in, horizontal flip, and brightness adjustments, enhancing the model performance. Training utilizes 80% of the data, with the remaining 20% allocated for testing. Three distinct MobileNet models are developed for males, females, and both genders combined, achieving accuracies of 70, 83.75, and 65%, respectively. These trained models are the foundation for a mobile application developed for the Android platform that enables users, particularly Betta fish sellers, and breeders, to efficiently classify Betta fish species, empowering them to set accurate prices based on the identified species.
Volume: 14
Issue: 1
Page: 28-38
Publish at: 2025-03-01

Designing business architecture for machinery distribution company using the open group architecture framework method

10.11591/ijaas.v14.i1.pp185-192
Vincent Ray Ananda , Francka Sakti Lee , Ririn Breliastiti
Machinery distribution company plays a crucial role in supporting various industries by providing the necessary machines and spare parts. This research focuses on the challenges faced by machine distribution companies in Jakarta, which have branches in Surabaya and Medan, Indonesia, especially in the management of warehouse data. The manual inspection process of stored goods for a long period of time results in operational inefficiencies and increased costs. To address this issue, this research proposes the application of enterprise architecture, specifically business architecture, using the open group architecture framework (TOGAF). This method to design optimal business processes that can improve productivity, reduce human errors, and enhance service quality. Through the analysis of current business processes and the planning of enterprise model interactions, this research identifies gaps in business architecture and designs business architecture to support the company's goals. The research results are expected to help companies improve operational efficiency and competitiveness in a constantly changing market.
Volume: 14
Issue: 1
Page: 185-192
Publish at: 2025-03-01

Identification and antioxidant activity test of β-tocopherol from Dompu corn oil as anti-aging

10.11591/ijaas.v14.i1.pp175-184
Adi Permadi , Pramudita Budiastuti , Barry Nur Setyanto , Rachmadian Wulandana , Fatma Nuraisyah , Putri Rachma Novitasari , Arief Syamsuddin , Muhammad Kaisar Sutomo Ramadhan , Andi Rifki Rosandy
Corn is a well-cultivated food crop that is grown extensively worldwide. The used portion of corn is its seeds, which are rich in oil. The objective of this study is to separate and characterize tocopherol from corn oil in Dompu, Sumbawa by employing spectroscopic techniques such as ultraviolet (UV) spectrophotometry, ultra-performance liquid chromatography (UPLC), nuclear magnetic resonance (NMR), and liquid chromatography-mass spectrometry (LC-MS). Subsequently, the in-vitro antioxidant activity of the tocopherol was assessed. 1 kilogram of dry maize kernels subjected to 70% ethanol extraction yielded 30 grams (35 ml) of corn oil. The purified isolate obtained from the fractionated extract, using radial chromatography, demonstrated the presence of tocopherol. The isolated sample exhibited the presence of beta-tocopherol. Beta-tocopherol's anti-aging properties were assessed by conducting an in-vitro antioxidant activity test utilizing the tyrosinase enzyme. The IC50 value obtained was 83.954±2.849 ppm. The IC50 value indicates that beta-tocopherol possesses significant antioxidant activity, making it suitable for usage as a primary ingredient in cosmetics and pharmaceutical products.
Volume: 14
Issue: 1
Page: 175-184
Publish at: 2025-03-01

Digital twin software provider: key players, rankings and trends

10.11591/ijaas.v14.i1.pp1-10
Lutz Sommer
Current studies about digital twins (DT) generally provide little support to interested parties in selecting suitable providers. The aim of the present study is, on the one hand, to ask whether existing rankings could be used to derive a quick, cost-efficient decision. On the other hand, it is to be questioned how the provider market is developing. Therefore, the study based on the one hand on 10 provider rankings of DT and the other hand on detailed research of n=153 providers was included for a detailed analysis of trends. The following findings were obtained: i) The selected top 10 rankings can serve as a fast, cost-efficient selection approach for providers; ii) the DT market is dominated by established, large top providers with North American locations; and iii) Since 2010 there has been a trend in the form of a disproportionately large number of new providers.
Volume: 14
Issue: 1
Page: 1-10
Publish at: 2025-03-01

Investigation on OMYA with single superstrate layer

10.11591/ijeecs.v37.i3.pp2087-2095
Kamelia Quzwain , Oki Ardiansyah , Levy Olivia Nur , Sevierda Raniprima , Alyani Ismail
The need for wireless communication technology is increasing rapidly. Many people are already using internet data services offered by providers or using wireless fidelity (Wi-Fi) services. One of the things that must be considered in Wi-Fi technology is that it requires antenna characteristics that have a relatively small shape and light mass. This paper aimed to improve gain and to analyze the performance of octagon microstrip Yagi antenna (OMYA) with a single superstrate layer. The antenna was designed, simulated, and measured. The experimental result presents that this concept is capable to produce a gain of 11.80 dB, a return loss of -23.24 dB, and the bandwidth is up to 800 MHz with total dimensions of 70×75 mm.
Volume: 37
Issue: 3
Page: 2087-2095
Publish at: 2025-03-01
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