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31,456 Article Results

Single observer speed sensorless field weakening control of two parallel motors

10.11591/ijpeds.v15.i4.pp2058-2067
Agus Suprajitno , Feri Yusivar , Abdul Halim
Two induction motors with parallel connected stator windings supplied by a single inverter (single observer) with a field weakening control system. The objective of this study is to propose a torque production speed sensorless vector control technique for each parallel connected rotor by adding field weakening control to improve the performance of each motor and reducing the number of adaptive observers on each motor to a single observer. Design of a rotor flux-oriented control (RFOC) system. Simulation results with the C-MEX S-function of MATLAB/Simulink 2015b show that the proposed method works better and can be operated at speeds that exceed the nominal speed of the motor.
Volume: 15
Issue: 4
Page: 2058-2067
Publish at: 2024-12-01

Unsupervised hindi word sense disambiguation using graph based centrality measures

10.11591/ijai.v13.i4.pp4957-4964
Prajna Jha , Shreya Agarwal , Ali Abbas , Satyendr Singh , Tanveer Jahan Siddiqui
The task of word sense disambiguation (WSD) plays a key role in multiple applications of natural language processing. In this paper, we propose a novel unsupervised method for targeted Hindi WSD task. First, we create a weighted graph where the nodes correspond to various synsets of the target word and the neighboring context words. The edges in the graph represent the semantic relations between these synsets in the Hindi WordNet hierarchy. A path-based similarity measure, namely Leacock-Chodorow similarity measure, is used to assign weights to edges. An unsupervised weighted graph-based centrality algorithm is used to identify the correct sense of a target word in a given context. The performance of the proposed algorithm is measured on 20 ambiguous Hindi nouns using four different graph-based centrality measures. We observed a maximum accuracy of 66.92% using PageRank centrality measure which is significantly better than earlier reported graph-based Hindi WSD algorithmsevaluated on the same dataset.
Volume: 13
Issue: 4
Page: 4957-4964
Publish at: 2024-12-01

Development of image extraction using the centerline method in the identification of appendicitis in ultrasonography

10.11591/ijeecs.v36.i3.pp1750-1758
Syafrika Deni Rizki , Yuhandri Yuhandri , Iskandar Fitri
Appendicitis is a disease that refers to inflammation of the appendix caused by obstruction, or blockage, in the lumen of the appendix. We investigated that this disease can be detected early through medical imaging such as ultrasonography (USG). However, the role of ultrasound in these cases is still limited due to the low visualization rate of the visible appendix. Based on this, this research aims to develop an image extraction process using the Centerline method in the process of identifying appendicitis in ultrasound images. The development of the extraction process is presented in the performance of the centerline and boundary extraction (CBE) algorithm which can represent image objects as boundaries that limit and separate one area from other areas. The research dataset used was 2097 ultrasound images sourced from 90 patients at the West Sumatra Lung Hospital. Based on the tests that have been carried out, it has been proven that it can reduce the width of the image object iteratively until the object is represented as a center line or the thinnest representation. The performance of the CBE algorithm in the identification process is sufficient to provide accuracy results of 92%. These results can be a new extraction concept that can provide accuracy in the identification process.
Volume: 36
Issue: 3
Page: 1750-1758
Publish at: 2024-12-01

Artificial intelligence detection of refractive eye diseases using certainty factor and image processing

10.11591/ijeecs.v36.i3.pp1787-1797
Rizal Rachman , Sari Susanti , Hendi Suhendi , Adi Karawinata Satyanegara
Refractive errors are defined as an impairment in the eye’s capacity to focus light, resulting in the formation of blurred or unfocused images. These issues arise from alterations in the shape of the cornea, the length of the eyeball, or the aging of the crystalline lens. It is anticipated that the prevalence of visual impairment will increase in conjunction with global population growth. At present, a significant number of countries have not yet accorded sufficient priority to eye health within their healthcare systems. This has resulted in insufficient awareness and reluctance to seek costly specialized care. This study proposes the development of an advanced refractive eye disease detection system with the objective of improving diagnostic accuracy, disseminating disease information, and reducing financial barriers to specialist consultation. The research employs certainty factor (CF) methods and image processing with feature extraction. The initial results demonstrate the potential for identifying specific refractive eye diseases with high certainty through the analysis of symptoms and the examination of photographs of the eye. The proposed approach provides an alternative method for diagnosing refractive eye diseases, which could enhance access to refractive eye care services and reduce the economic burden on patients.
Volume: 36
Issue: 3
Page: 1787-1797
Publish at: 2024-12-01

Blockout 2024: digital mobilization movements’ role in raising global awareness and fostering change

10.11591/ijict.v13i3.pp436-444
Tole Sutikno , Lina Handayani
Blockout 2024, a social media mobilization campaign, gained traction in response to celebrities’ and powerful people’s silence following the Met Gala in New York. Users who have remained silent or unconcerned about the humanitarian situation in Gaza are encouraged to block influencers’ accounts. The review seeks to investigate the Blockout 2024 phenomenon and how it affects celebrities’ social media. This review examines the impact of social media on power dynamics. On social media platforms such as TikTok, Instagram, and X, users have blocked the accounts (especially celebrities’ account) of those who have not responded to the humanitarian disaster. The movement emphasizes the importance of implementing change and making underrepresented voices heard in digital environments. While some celebrities have expressed their support, others have chosen to remain silent, which has resulted in criticism and lost followers. Finally, the Blockout 2024 campaign has gained significant traction on social media platforms such as X, Instagram, and TikTok. Users of social media are becoming more aware of their responsibility to denounce crimes and fight for justice, as evidenced by this group effort. The Blockout 2024 movement has highlighted the potential of digital mobilization to raise global awareness, address humanitarian crises, and hold influencers accountable.
Volume: 13
Issue: 3
Page: 436-444
Publish at: 2024-12-01

Enhanced driving assistance: automated day and night vehicle detection system utilizing convolutional neural networks

10.11591/ijeecs.v36.i3.pp1532-1542
Abdelmoghit Zaarane , Ibtissam Slimani , Mourad Elhabchi , Issam Atouf
This paper presents an enhanced real-time vehicle detection system using convolutional neural networks (CNNs) for both daytime and night-time conditions. Initially, the system determines the time of capture by analyzing the upper part of input images. For daytime detection, it uses normalized cross-correlation and two-dimensional discrete wavelet transform (2D-DWT) techniques. Night-time detection involves identifying vehicle lamps through color thresholding and connected component techniques, followed by symmetry analysis and CNN classification. The dataset for training includes images from the Caltech Cars, AOLP, KITTI Vision, and night-time vehicle detection datasets, ensuring robust performance across various lighting conditions. Experiments demonstrate the system's high accuracy, achieving 99.2% during the day and 98.27% at night, meeting real-time requirements and enhancing driving assistance systems' reliability.
Volume: 36
Issue: 3
Page: 1532-1542
Publish at: 2024-12-01

Plant disease classification using novel integration of deep learning CNN and graph convolutional networks

10.11591/ijeecs.v36.i3.pp1721-1730
Saka Uma Maheswara Rao , Keshetti Sreekala , Pulluri Srinivas Rao , Nalla Shirisha , Gunnam Srinivas , Erry Sreedevi
Plant diseases present substantial challenges to global agriculture, significantly affecting crop yields and jeopardizing food security. Accurate and timely detection of these diseases is paramount for mitigating their adverse effects. This paper proposes a novel approach for plant disease classification by integrating convolutional neural networks (CNNs) and graph convolutional networks (GCNs). The model aims to enhance classification accuracy by leveraging both visual features extracted by CNNs and relational information captured by GCNs. Using a Kaggle dataset containing images of diseased and healthy plant leaves from 31 classes, including apple, corn, grape, peach, pepper bell, potato, strawberry, and tomato. Standalone CNN models were trained on image data from each plant type, while standalone GCN models utilized graph-structured data representing plant relationships within each subset. The proposed integrated CNN-GCN model capitalizes on the complementary strengths of CNNs and GCNs to achieve improved classification performance. Through rigorous experimentation and comparative analysis, the effectiveness of the integrated CNN-GCN approach was evaluated alongside standalone CNN and GCN models across all plant types. Results demonstrated the superiority of the integrated model, highlighting its potential for enhancing plant disease classification accuracy.
Volume: 36
Issue: 3
Page: 1721-1730
Publish at: 2024-12-01

Developed improved lion optimization for breast cancer classification using histopathology images

10.11591/ijeecs.v36.i3.pp1613-1619
Pattan M. D. Ali Khan , Xavier Arputha Rathina
Breast cancer, a prevalent kind of cancer, is a major health problem among women. Researchers recently achieved categorization effectiveness of breast cancer (BC) detection in histopathology picture database using convolutional neural networks (CNNs) of medical image processing. Although CNN method parameter settings were complex, employing breast cancer histopathological database (BCHD) data for categorization was valued as expensive. This research used uniform experimental design (UED) to solve these issues and improved lion optimization (ILO) breast cancer histopathology image categorization. To optimize the variables at UED-ILO, a regression method was employed. According to the experimental data, the proposed approach of UED-ILO (uniform experimental design based improved lion optimization) variable optimization provided a categorization accuracy rate of 84.41%. Finally, the proposed approach can effectively increase classification accuracy, with results that outperform others of an equivalent nature.
Volume: 36
Issue: 3
Page: 1613-1619
Publish at: 2024-12-01

Bayes estimation of a two-parameter exponential distribution and its implementation

10.12928/telkomnika.v22i6.26015
Ardi; Universitas Airlangga Kurniawan , Johanna Tania; Universitas Airlangga Victory , Toha; Universitas Airlangga Saifudin
Life test data analysis is a statistical method used to analyze time data until a certain event occurs. If the life test data is produced after the experiment has been running for a set amount of time, the life time data may be type I censored data. When conducting observations for survival analysis, it is anticipated that the data would conform to a specific probability distribution. Meanwhile, to determine the characteristics of a population, parameter estimation is carried out. The purpose of this study is to use the linear exponential loss function method to derive parameter estimators from the exponential distribution of two parameters on type I censored data. The prior distribution used is a non-informative prior with the determination technique using the Jeffrey’s method. Based on the research results that have been obtained, application is carried out on real data. This data is data on the length of time employees have worked before they experienced attrition with a censorship limit based on age, namely 58 years, obtained from the Kaggle.com website. Based on the estimation results, the average length of work for employees is 6.29427 years. This shows that employees tend to experience attrition after working for a relatively long period of time.
Volume: 22
Issue: 6
Page: 1443-1449
Publish at: 2024-12-01

Information system architecture for healthcare company based on TOGAF

10.11591/ijaas.v13.i4.pp810-817
Vania Christy , Johanes Fernandes Andry , Ahya Radiatul Kamila , Francka Sakti Lee
In 2020 COVID-19 cases have entered Indonesia causing public health problems and millions of deaths. To prevent transmission of COVID-19, an air purifier is needed whose function is to remove small droplets that can carry the virus. One of them is a medical device company located in Jakarta. The purpose of this research is to produce a design that can improve business processes in the health sector and achieve company goals. The current business process is not very optimal because it is still done conventionally and the existing system has not been integrated with other divisions. To achieve business goals, it is necessary to integrate business processes with information technology (IT) and technology development that will be proposed based on the design of information system architecture that will produce a blueprint and assisted by the open group architecture framework (TOGAF) framework which is very helpful in the process of analyzing company needs. In this research, data collection through interviews with directors and direct observation of health service companies. The results of this study are recommendations given to help health.
Volume: 13
Issue: 4
Page: 810-817
Publish at: 2024-12-01

A new hybrid LED driver

10.11591/ijpeds.v15.i4.pp2367-2375
Orazbayev Sagi , Dzhunusbekov Erlan
The ongoing challenge in light-emitting diode (LED) lighting is to integrate power and control circuits into a single chip to reduce the number and cost of components, minimize size, and enhance reliability. This integration requires a reduction in power dissipation on the chip, improved efficiency, and smaller magnetic components. Recently, hybrid LED drivers have been proposed to address this integration challenge. Unlike traditional transformerless single-stage LED drivers, which implement boost or buck topologies, hybrid drivers reduce pulsed voltage on power semiconductors. The proposed hybrid LED driver aims to prevent power switches from hard switching, which in turn reduces metal–oxide semiconductor field-effect transistor or MOSFETs' overheating in the integrated circuit body, increases the reliability of the chip, and alleviates electromagnetic interference or EMI issues. The proposed improvement to the hybrid driver is analyzed. The control method was suggested. Computer modelling was provided to confirm the feasibility, controllability and resulting advantages of the proposal. The proposed hybrid LED driver is attractive for circuit integration to reduce size and cost compared to the achievements of previous art.
Volume: 15
Issue: 4
Page: 2367-2375
Publish at: 2024-12-01

Nonlinear robust control applied to the six-phase induction machine

10.11591/ijpeds.v15.i4.pp2089-2096
Yarba Ahmed , Aichetoune Oumar , Mohamed Cherkaoui
This paper proposes a nonlinear robust control for the six-phase induction machine (SPIM). It is based on the super twisting sliding mode (STSM) to ensure good decoupling and robust performance. This paper proposes also a comparative study between STSM and active disturbance rejection control (ADRC). We apply the rotor field-oriented control to ensure the decoupling between the magnitudes of the SPIM. Then we study the STSM control to regulate the rotor speed, the stator currents, and the rotor flux of the machine. The STSM ensures the same performance as the classical sliding mode control with the advantage of reducing the phenomenon of chattering. At the same time, the STSM command is compared to the ADRC command. The ADRC is one of the robust commands that makes it possible to estimate and eliminate internal or external disturbances. To test the robustness of the STSM and the ADRC, we implanted them in Simulink/MATLAB and the simulation results show the effectiveness of the STSM control compared to the ADRC control.
Volume: 15
Issue: 4
Page: 2089-2096
Publish at: 2024-12-01

Risk disclosure and financial performance of Islamic banks in Jordan: the moderating role of financial technology

10.11591/ijeecs.v36.i3.pp1711-1720
Mohammed Abd-Akarim Almomani , Adai Al-Momani
Risk disclosure (RD) is important to inform investors. However, few studies examined this variable in developing countries and in Islamic bank context. This research investigates how RD affect financial performance (FP) of Islamic banks in Jordan. It also examines the moderating role of financial technology (FinTech). We use a quantitative method to examine how mandatory risk disclosure (MRD) and voluntary risk disclosure (VRD) impact return on assets (ROA) and return on equity (ROE) in Islamic banks operating in Jordan. Our results show that both MRD and VRD have a significant effect on FP of Islamic banks. Moreover, FinTech acts as a moderator in the connection between risk disclosure (MRD and VRD) and FP performance. The effect was compared before and after coronaviruses disease 2019 (COVID-19) and it shows that the COVID-19 has increased the effect of MRD and VRD on FP of Islamic banks. More focus on VRD and MRD will enhance the FP of Islamic banks in Jordan.
Volume: 36
Issue: 3
Page: 1711-1720
Publish at: 2024-12-01

Leveraging transformer models for enhanced temperature forecasting: a comparative analysis in the Beni Mellal region

10.11591/ijeecs.v36.i3.pp1694-1700
Hamza Jdi , Noureddine Falih
The remarkable impact of transformers in artificial intelligence, exemplified by applications like GPT-3 in language processing, has sparked interest in their potential for time series analysis. This study aims to explore whether transformers, specifically temporal fusion transformers (TFT), can outperform conventional methods in this domain. The research question is whether TFT exhibits superior performance compared to conventional recurrent neural network (RNN) methods, specifically gated recurrent unit (GRU), and traditional machine learning approaches, notably autoregressive integrated moving average (ARIMA), in the context of time series analysis and temperature prediction. A comparative analysis is conducted among three models: ARIMA, GRU, and TFT. The study utilizes time series data spanning from 1984 to the end of 2022. The models’ performances are evaluated using multiple metrics: mean absolute error (MAE), root mean square error (RMSE), mean absolute percentage error (MAPE), and the coefficient of determination (R2). The TFT model achieves the lowest MAE, indicating high accuracy in its predictions. It outperforms both the RNN and traditional machine learning in temperature prediction tasks. Integrating the TFT model with the FAO penman-monteith method could improve irrigation scheduling due to more accurate temperature predictions, potentially enhancing water efficiency and crop yields.
Volume: 36
Issue: 3
Page: 1694-1700
Publish at: 2024-12-01

Improve fractal interpolation function with Sierspinski triangle

10.11591/ijeecs.v36.i3.pp1485-1492
Eka Susanti , Fitri Maya Puspita , Siti Suzlin Supadi , Evi Yuliza , Redina An Fadhila Chaniago
Interpolation techniques can be used to determine the approximate value of a parameter if it is known that two values are bound to a certain interval. Interpolation can be done numerically or fractal. The fractal interpolation value is influenced by the vertical scale factor and the fractal interpolation function (FIF). This research introduces fractal interpolation technique with FIF which is constructed from Sierspinski triangles. As an example of application, the interpolation technique is applied to determine the approximate value of the rice demand parameter in the inventory model. The accuracy of the interpolation results is determined using the mean absolute percentage error (MAPE). The number of triangles obtained and the interpolation values for each successive iteration are 3𝑛 and 3𝑛+1. MAPE values from 6 to 9 iteration were 24.603%, 24.603%, 23.858%, 23.772% respectively. There is a decrease in the value of MAPE, this indicates an increase in the value of the accuracy of the interpolation results. It can be concluded that the MAPE value is also influenced by the number of iterations of the interpolation technique.
Volume: 36
Issue: 3
Page: 1485-1492
Publish at: 2024-12-01
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