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All Journal SITEKIN: Jurnal Sains, Teknologi dan Industri Prosiding Semnastek Jurnal Teknologi dan Sistem Komputer Jurnal CoreIT Indonesian Journal of Artificial Intelligence and Data Mining Seminar Nasional Teknologi Informasi Komunikasi dan Industri Jurnal Informatika Universitas Pamulang JURIKOM (Jurnal Riset Komputer) Informatika : Jurnal Informatika, Manajemen dan Komputer Jurnal Tekinkom (Teknik Informasi dan Komputer) JOURNAL OF INFORMATION SYSTEM RESEARCH (JOSH) Journal of Computer System and Informatics (JoSYC) Jurnal Sistem Komputer dan Informatika (JSON) JUKI : Jurnal Komputer dan Informatika Bulletin of Computer Science Research KLIK: Kajian Ilmiah Informatika dan Komputer Jurnal Pengembangan Teknologi Informasi dan Komunikasi (JUPTIK)
Lestari Handayani
Fakultas Sains Dan Teknologi Universitas Islam Negeri (UIN) Sultan Syarif Kasim Riau
Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Library & Information Science Mathematics Other

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IMPLEMENTASI WEB SERVICE REST API UNTUK PENCARIAN RUJUKAN ISLAM MENGGUNAKAN ELASTICSEARCH Fachrul Hakim; Nazruddin Safaat H; Lestari Handayani; Liza Afriyanti
Jurnal Tekinkom (Teknik Informasi dan Komputer) Vol 7 No 1 (2024)
Publisher : Politeknik Bisnis Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37600/tekinkom.v7i1.1314

Abstract

This study aims to develop a web-based search system for Islamic references using Elasticsearch, ExpressJS, and VueJS technology to facilitate access to valid religious information. During the data collection stage, the researcher gathered data from the Qur'an and 9 Hadith books in SQL file format. In the analysis and design stage, Elasticsearch technology was used for data search, ExpressJS for the backend providing the API, and VueJS for the frontend. Implementation involved configuring Elasticsearch and Logstash to process data in real-time. Testing was conducted using Black Box Testing, User Acceptance Test (UAT), and Postman to ensure system functionality. The results showed that the system operated well and received a score of 83% in the UAT, indicating it is suitable for use. This system enables efficient and valid searches for Islamic references, supporting better religious practices.
Klasifikasi Tingkat Keberhasilan Produksi Ayam Broiler di Riau Menggunakan Algoritma K-Nearest Neighbor Beni Basuki; Alwis Nazir; Siska Kurnia Gusti; Lestari Handayani; Iwan Iskandar
Jurnal Sistem Komputer dan Informatika (JSON) Vol. 4 No. 3 (2023): Maret 2023
Publisher : Universitas Budi Darma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30865/json.v4i3.5800

Abstract

Livestock is a crucial component of the Indonesian agriculture sector. One of the most widely practiced types of livestock farming is broiler chicken farming. The production of broiler chickens continues to increase due to the increasing consumption of broiler chickens. Presently, companies are facing an urgent requirement to support farmers, regardless of their level of experience, whether they are newly entering the sector or have been established for some time. Core companies encounter challenges in modeling the success rate of broiler chicken farmer production because of the vast quantity of data coming from collaborating farmers, which makes it arduous for the company to establish the success rate of broiler chicken production. Establishing the level of production success is very helpful in selecting the appropriate farmers to be guided, thus enabling accurate decision-making. A classification procedure utilizing data mining and K-Nearest Neighbor (KNN) algorithm is necessary to manage the growing volume of data. The study examined 927 livestock production data from Riau, where the data was divided into two sets, with 80% allocated for training and the remaining 20% for testing purposes. The findings of the confusion matrix analysis showed that the optimal result was achieved at k = 3, with an accuracy rate of 86.49%, precision of 75.00%, and recall of 70.21%.
Klasifikasi Citra Daging Sapi dan Daging Babi Menggunakan CNN Arsitektur EfficientNet-B6 dan Augmentasi Data M. Fadil Martias; Jasril Jasril; Suwanto Sanjaya; Lestari Handayani; Febi Yanto
Jurnal Sistem Komputer dan Informatika (JSON) Vol. 4 No. 4 (2023): Juni 2023
Publisher : Universitas Budi Darma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30865/json.v4i4.6195

Abstract

In daily life, beef often serves as a staple food for humans. However, the high and expensive price of beef has prompted traders to adulterate it with pork for the sake of profit. Such adulteration has serious implications in the Islamic religion, where not all types of meat are considered halal (permissible for consumption), such as pork. As a result, consumers often remain unaware that the beef they purchase has been adulterated with pork. At a glance, both types of meat exhibit similar appearance and texture, making them difficult to differentiate. This research aims to classify beef and pork using a deep learning model with the Convolutional Neural Network (CNN) method, combined with data augmentation. The model used is EfficientNet-B6 with variations in the testing scenario. The variations include the ratio of training and testing data, learning rates, and optimizer for EfficientNet-B6. Data augmentation is performed using techniques such as random rotation, shifting, image scaling, vertical and horizontal flipping, and nearest pixel filling. Evaluation results using the confusion matrix show that the model with data augmentation achieves the highest accuracy for the classes of beef, pork, and adulterated samples at 92.00%, while the model without augmentation achieves an accuracy of 91.67%. However, from this experiment, the best scenario to avoid misclassifying pork and adulterated samples as beef can be obtained. This scenario involves a model with data augmentation, a 90:10 data split, SGD optimizer, and a learning rate of 0.01, which achieves the highest precision for the beef class at 96.05%. The research findings demonstrate that the use of data augmentation on images can improve the model's performance, and the model with data augmentation, a 90:10 data split, SGD optimizer, and a learning rate of 0.01 exhibits the best performance in classifying beef images.
Implementasi Regresi Linier Berganda Untuk Prediksi Harga Mobil Bekas Di Indonesia Berbasis Gradio M Ridho Alfani; Elvia Budianita; Lestari Handayani; Siti Ramadhani
Bulletin of Computer Science Research Vol. 6 No. 4 (2026): June 2026
Publisher : Forum Kerjasama Pendidikan Tinggi (FKPT)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47065/bulletincsr.v6i4.1097

Abstract

The price of a used vehicle depends on various aspects that cause changes in the selling value in the market, such as model, year, transmission, mileage, fuel, tax, mpg, and cc. A common problem in used car transactions is determining prices that are still not fully based on measurable data analysis. The purpose of this study is to design a model to estimate the price of a used car through the multiple linear regression method and implement it in the User Interface. The data used in this study is secondary data obtained from the Kaggle public repository, and collected from several used car buying and selling forums in Pekanbaru and social media platforms such as Facebook that contain vehicle price information. The dataset contains 400 rows of data with a range of car years from 2005 to 2025. The research stages include data preprocessing in the form of categorical variable encoding and data normalization. Data is divided into training data and testing data, followed by the process of model building and model performance assessment. Evaluation is carried out using the Mean Squared Error (MSE), Root Mean Squared Error (RMSE), Mean Absolute Error (MAE), and coefficient of determination (R²) metrics. The model was built using several independent variables, namely model, year, transmission, kilometer, fuel, tax, mpg, and cc, with vehicle price as the dependent variable. Based on the test results, the multiple linear regression method shows the ability to produce used car price estimates and has potential for application in decision support systems. The test results show that the MSE value on the training data is 0.004 and the testing data is 0.010, MAE on the training data is 0.046 and the testing data is 0.071, and RMSE on the training data is 0.062 and 0.100 on the testing data, the coefficient of determination (R²) on the training data is 0.985 and on the testing data is 0.955. The next model is implemented using the Python Gradio library so that users can predict vehicle prices through the User Interface.
A Support Vector Regression Approach for Predicting the Remaining Useful Life of Turbofan Engines Muhammad Vio Hardiansyah; Fitri Insani (Scopus ID: 57190404820); Lestari Handayani; Jasril Jasril; Suwanto Sanjaya
Jurnal CoreIT: Jurnal Hasil Penelitian Ilmu Komputer dan Teknologi Informasi Vol. 11 No. 2 (2025): December 2025
Publisher : Fakultas Sains dan Teknologi, Universitas Islam Negeri Sultan Syarif Kasim Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Turbofan engines are crucial components in the aviation and manufacturing industries, where estimating the Remaining Useful Life (RUL) has a significant impact on operational efficiency and safety. This study aims to predict the RUL of turbofan engines using the Support Vector Regression (SVR) method, a machine learning approach that has proven effective in modeling nonlinear relationships between variables. Operational data related to turbofan engines include operational parameters, sensors, and maintenance records. The initial stage of this research involves data analysis based on unit number, time, operational control, and sensor parameters. This process begins with preprocessing to initialize the initial data values, normalize, and select sensors that have stagnant values, as these sensors do not affect the machine learning system. Subsequently, regression calculations are performed to compare predicted values and actual values using the Support Vector Regression method optimized with Grid Search Optimization. In this study, testing was conducted with Parameters C [1, 10, 50, 100] and ε [1, 5, 10, 50], resulting in the best model with an RMSE error of 19.56 and MAE of 14.73.
Analisis Penerapan Flexmatch Pada Semi-Supervised Deep Learning Untuk Deteksi Penyakit Paru-Paru Berbasis Citra Chest X-Ray M. Aufaa Rahman; Benny Sukma Negara; Muhammad Irsyad; Lestari Handayani; Iis Afrianty
Jurnal Pengembangan Teknologi Informasi dan Komunikasi (JUPTIK) Vol. 4 No. 1 (2026): JURNAL PENGEMBANGAN TEKNOLOGI INFORMASI DAN KOMUNIAKSI (JUPTIK)
Publisher : Universitas Muhammadiyah Muara Bungo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52060/juptik.v4i1.4439

Abstract

Penyakit paru-paru seperti COVID-19 dan Pneumonia merupakan penyebab utama morbiditas dan mortalitas di dunia, sehingga diperlukan metode deteksi dini yang akurat dan efisien. Penelitian ini bertujuan menganalisis penerapan FlexMatch pada skema Semi-Supervised Deep Learning untuk klasifikasi penyakit paru-paru berbasis citra Chest X-ray (CXR), dengan memanfaatkan data berlabel dan tidak berlabel melalui mekanisme Curriculum Pseudo Labeling dan class-adaptive thresholding, serta DenseNet-169 sebagai ekstraktor fitur utama. Dataset yang digunakan terdiri dari 3.000 citra CXR yang mencakup tiga kelas, yaitu COVID-19, pneumonia, dan normal. Tahapan penelitian meliputi preprocessing data, augmentasi citra, pembagian data, pelatihan model, serta evaluasi menggunakan accuracy, precision, recall, F1-score, dan Grad-CAM. Hasil penelitian menunjukkan bahwa model mencapai akurasi validasi sebesar 96,65% dengan F1-score masing-masing sebesar 99,02% untuk COVID-19, 95,74% untuk Normal, dan 94,48% untuk Pneumonia. Visualisasi Grad-CAM membuktikan bahwa model mampu memfokuskan perhatian pada area paru yang relevan secara klinis, sehingga FlexMatch terbukti efektif meningkatkan performa klasifikasi pada kondisi data berlabel terbatas dan berpotensi mendukung sistem diagnosis penyakit paru-paru berbasis kecerdasan buatan.  
Co-Authors Agung Surya Maulana Ahmad Paisal Alfin Hernandes Alwis Nazir Alwis Nazir Alwis Nazir Anggi Vasella Angraini Angraini Beni Basuki Cut Lira Kabaatun Nisa Deny Ardianto Eka Lona Maulida Elvia Budianita Fachrul Hakim Fadhilah Syafria Febi Yanto Fitri Insani Fitriandini Fitriandini Gatot Suroto Gusti, Siska Kurnia Hafez Almirza Iis Afrianty Ikhwanul Akhmad DLY Indah Inzani Septa Iwan Iskandar Iwan Iskandar Jasril Jasril Liza Afriyanti M Ridho Alfani M. Aufaa Rahman M. Fadil Martias Meiky Surya Cahyana Mentari Aulia Putri Mohd. Ridho Zarkasih Rahim Muhammad Adri Muhammad Fikry Muhammad Irsyad Muhammad Rifaldo Al Magribi Muhammad Vio Hardiansyah Mustakim Mustakim Nazruddin Safaat H Negara, Benny Sukma Okfalisa Okfalisa Qurrata A'yuni Raja Indra Ramoza Rendra Arga Swaperi Risfi Ayu Sandika Rusnedy, Hidayati Shella Novi Siti Ramadhani Siti Ramadhani Suwanto Sanjaya Ulfah Adzkia