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All Journal Jurnal Nasional Pendidikan Teknik Informatika (JANAPATI) JOURNAL OF INFORMATION SYSTEM RESEARCH (JOSH) Jurnal Teknik Informatika (JUTIF) Jurnal Algoritma
Amril Mutoi Siregar
Informatic Departement, Faculty Of Computer Science, Universitas Buana Perjuangan Karawang, Indonesia
Computer Science & IT Decision Sciences, Operations Research & Management Education Engineering

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OPTIMIZATION OF MACHINE LEARNING MODEL ACCURACY FOR BRAIN TUMOR CLASSIFICATION WITH PRINCIPAL COMPONENT ANALYSIS Indra Maulana; Amril Mutoi Siregar; Rahmat Rahmat; Ahmad Fauzi
Jurnal Teknik Informatika (Jutif) Vol. 5 No. 3 (2024): JUTIF Volume 5, Number 3, June 2024
Publisher : Informatika, Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52436/1.jutif.2024.5.3.2058

Abstract

The main issue in brain tumor classification is the accuracy and speed of diagnosis through medical imaging. This study aims to improve the accuracy of machine learning models for brain tumor classification by using Principal Component Analysis (PCA) for dimensionality reduction. The research methods include image preprocessing, feature scaling, PCA application, and the implementation of machine learning algorithms such as Logistic Regression, Random Forest, Support Vector Machine (SVM), K-Nearest Neighbor (KNN), and Naive Bayes. The dataset consists of 3,264 images divided into training and testing sets. The results show that the use of PCA has varying impacts on different algorithms. PCA increases the accuracy of the SVM algorithm from 81% to 83% and KNN from 68% to 71%, but decreases the accuracy of Logistic Regression from 77% to 69% and Naive Bayes from 49% to 42%. Evaluation is performed using the Confusion Matrix and AUC-ROC to measure model performance. In conclusion, selecting the appropriate algorithm and preprocessing method is crucial in medical image classification, and the use of PCA should be considered based on the characteristics of the data and the algorithms used. This study also encourages the exploration of alternative dimensionality reduction methods for medical image analysis.
Penerapan Algoritma K-means Clustering dan Hierarchical Clustering dalam Mengelompokkan Data Pengangguran di Karawang Mulyana, Assyifa Alif Rahayu; Juwita, Ayu Ratna; Siregar, Amril Mutoi; Fauzi, Ahmad
Jurnal Algoritma Vol 21 No 2 (2024): Jurnal Algoritma
Publisher : Institut Teknologi Garut

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

Abstract

The existence of various new industrial areas in Karawang can trigger residents from outside the area to migrate so that this will increase the number of residents in Karawang. The increase in population can affect the unemployment rate in an area. To group data, you can use data mining techniques. The K-Means Clustering and Hierarchical Clustering algorithms have not been used to group unemployment data, so this research aims to group unemployment data with these two algorithms. The results are that the K-Means Clustering and Hierarchical Clustering algorithms can group data based on similar characteristics with the same number of clusters but have differences in data distribution within the clusters. The evaluation method with Silhouette Score shows that the two algorithms have the same performance in the analysis in this study.
Classification of Dog Emotions Using Convolutional Neural Network Method Hermawan, Slamet; Siregar, Amril Mutoi; Faisal, Sutan; Mudzakir, Tohirin Al
Jurnal Nasional Pendidikan Teknik Informatika : JANAPATI Vol. 13 No. 2 (2024)
Publisher : Prodi Pendidikan Teknik Informatika Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/janapati.v13i2.74340

Abstract

The utilization of neural networks in dog emotion classification has great potential to improve the understanding of pet emotions. The goal is to develop a dog emotion classification system. This is important due to the lack of public ability to recognize and understand dog emotions. Neural networks able to create learning models can be used for decision-making, thus helping to reduce the risk of dangerous dog attacks. CNN itself is part of neural networks, where the CNN model has a higher accuracy rate of 74.75% compared to ResNet 65.10% and VGG 68.67%. Modeling using ROC-AUC shows the model's ability to distinguish emotion classes well. Angry has the highest AUC of 0.97, happy 0.93 and sad 0.96. While relaxed has the lowest AUC of 0.92. Classification report results show model has the highest precision and F1-Score values in angry class, while the highest recall value is in sad class.
Model Klasifikasi Nominal Mata Uang Kertas Republik Indonesia Menggunakan Convolutional Neural Network Saputra, Arbi Niandi; Handayani, Hanny Hikmayanti; Sukmawati, Cici Emilia; Siregar, Amril Mutoi
Journal of Information System Research (JOSH) Vol 6 No 1 (2024): Oktober 2024
Publisher : Forum Kerjasama Pendidikan Tinggi (FKPT)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47065/josh.v6i1.5927

Abstract

Uang kertas adalah alat pembayaran umum di seluruh dunia saat ini karena digunakan dalam transaksi jual beli barang dan jasa. Nilai uang kertas Rupiah di Indonesia memiliki variasi yang mencakup ukuran, warna, dan pola yang berbeda. Identifikasi manual dapat menyebabkan kesalahan, sehingga diperlukan sistem pengenalan uang kertas yang efisien dan akurat. Permasalahan dalam mata uang terbaru menekankan pentingnya sistem pendeteksi yang selalu memperbarui data referensinya agar tetap akurat. Mata uang baru dengan desain atau fitur keamanan yang berbeda dapat menantang kemampuan sistem dalam mengenali keasliannya. Sistem harus mampu dengan cepat mengidentifikasi elemen baru dan memperbarui database referensi untuk menghindari risiko kesalahan atau penipuan. Oleh karena itu, penelitian perlu difokuskan pada pengembangan mekanisme pembaruan data secara real-time untuk menjaga responsivitas sistem terhadap perubahan mata uang. Maka dari itu, dilakukan klasifikasi nominal mata uang kertas Republik Indonesia Tahun Emisi 2022 menggunakan Convolutional Neural Network. Tahapan yang dilakukan yaitu proses akuisisi citra, preprocessing, pelatihan model, dan evaluasi. Dengan teknik pengenalan berdasarkan pola bunga yang terdapat pada uang kertas Republik Indonesia. Hasil yang peroleh yaitu akurasi sebesar 99% dengan 694 data berhasil diklasifikasi dari 700 data pengujian.
Co-Authors AA Sudharmawan, AA Ahmad Fauzi Faisal, Sutan Hanny Hikmayanti Handayani Hermawan, Slamet Indra Maulana Juwita, Ayu Ratna Mudzakir, Tohirin Al Mulyana, Assyifa Alif Rahayu Rahmat Rahmat Saputra, Arbi Niandi Sukmawati, Cici Emilia