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Comparative Analysis of Denoising Techniques for Optimizing EEG Signal Processing I Putu Agus Eka Darma Udayana; Made Sudarma; I Ketut Gede Darma Putra; I Made Sukarsa; Minho Jo
Lontar Komputer : Jurnal Ilmiah Teknologi Informasi Vol. 15 No. 02 (2024): Vol. 15, No. 2 August 2024
Publisher : Institute for Research and Community Services, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/LKJITI.2024.v15.i02.p05

Abstract

Electroencephalogram (EEG) is a non-invasive technology widely used to record the brain's electrical activity. However, noise often contaminates the EEG signal, including ocular artifacts and muscle activity, which can interfere with accurate analysis and interpretation. This research aims to improve the quality of EEG signals related to concentration by comparing the effectiveness of two denoising methods: Independent Component Analysis (ICA) and Principal Component Analysis (PCA). Using commercial EEG headsets, this study recorded Alpha, Beta, Delta, and Theta signals from 20 participants while they performed tasks that required concentration. The effectiveness of the denoising technique is evaluated by focusing on changes in standard deviation and calculating the Percentage Residual Difference (PRD) value of the EEG signal before and after denoising. The results show that ICA provides better denoising performance than PCA, as reflected by a significant reduction in standard deviation and a lower PRD value. These results indicate that the ICA method can effectively reduce noise and preserve important information from the original signal.
Comparison of Gain Ratio and Chi-Square Feature Selection Methods in Improving SVM Performance on IDS Ricky Aurelius Nurtanto Diaz; I Ketut Gede Darma Putra; Made Sudarma; I Made Sukarsa; Naser Jawas
Lontar Komputer : Jurnal Ilmiah Teknologi Informasi Vol. 15 No. 01 (2024): Vol. 15, No. 01 April 2024
Publisher : Institute for Research and Community Services, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/LKJITI.2024.v15.i01.p06

Abstract

An intrusion detection system (IDS) is a security technology designed to identify and monitor suspicious activity in a computer network or system and detect potential attacks or security breaches. The importance of accuracy in IDS must be addressed, given that the response to any alert or activity generated by the system must be precise and measurable. However, achieving high accuracy in IDS requires a process that takes work. The complex network environment and the diversity of attacks led to significant challenges in developing IDS. The application of algorithms and optimization techniques needs to be considered to improve the accuracy of IDS. Support vector machine (SVM) is one data mining method with a high accuracy level in classifying network data packet patterns. A feature selection stage is needed for an optimal classification process, which can also be applied to SVM. Feature selection is an essential step in the data preprocessing phase; optimization of data input can improve the performance of the SVM algorithm, so this study compares the performance between feature selection algorithms, namely Information Gain Ratio and Chi-Square, and then classifies IDS data using the SVM algorithm. This outcome implies the importance of selecting the right features to develop an effective IDS.
Rancang Bangun Aplikasi Pencatatan Keuangan dan Simulasi Investasi Berbasis Web I Made Rian Suputra; I Made Sukarsa; Anak Agung Ketut Agung Cahyawan Wiranatha
Reslaj: Religion Education Social Laa Roiba Journal Vol. 7 No. 10 (2025): RESLAJ: Religion Education Social Laa Roiba Journal
Publisher : Intitut Agama Islam Nasional Laa Roiba Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47467/reslaj.v7i10.9443

Abstract

Accurate financial recording and effective investment management are essential for optimizing the use of financial resources, identifying spending patterns, and maximizing investment growth. The aim of this research is to assist users in managing daily income and expenses, as well as to support decision-making in financial investments. Therefore, it is necessary to develop an application that offers practical solutions for financial recording and investment management. The financial recording and investment simulation application is developed using the Laravel Framework with the waterfall development method. The programming language used is PHP, and the database is MySQL. Application testing was carried out using Black Box Testing to verify functionality and Stress Testing to evaluate system performance and resilience. The Stress Testing scenario involved 100 samples with a ramp-up period of 10 seconds and a loop count of 1, testing one of the API endpoints, namely the news endpoint. The results of the Black Box Testing indicate that the application successfully performs the expected scenarios, and the Stress Testing results show that the application demonstrates adequate resilience under high workload conditions.
Co-Authors A.A Primaningrat Gita Puspita A.A. Istri Alit Dwi Purnamaningrat Agus Aan Jiwa Permana Ahmad Budi Setiawan Ahmad Hanafi Anak Agung Ketut Agung Cahyawan Anak Agung Ketut Agung Cahyawan Wiranatha Anak Agung Kompiang Oka Sudana Anak Agung Ngurah Aditya Winata Anak Agung Ngurah Hary Susila Anastia petika Andreyana, Putu Veda Anindya Santika Devi Antara, I Kadek Ari Melinia Arsa, Dewa Made Sri Arya Utama, I Putu Juliarta Arynasta, I Putu Krisna Ayu Wirdiani Bambang Wahyudi Buana, I Putu Wira Candra, I Putu Wijaya Adi Christine Regilia Suwu Cristianto, Cevin Wahyu Defri Gentia Deria Dwi Antari Desak Made Novita Deshiwa Budilaksana Dewa Agung Krishna Arimbawa P Dewa Ayu Indah Cahya Dewi Dewa Komang Mahardika Dewi, Ni Putu Ari Sinta Dharma Krisna Putra, Kadek Dharmawan, K. Panji Dicky, Devtian Dina Wahyuni Puteri Duman Care Khrisne Dwi Putra Githa Dwi Rusjayanthi, Dwi Dwipayana, Ida Bagus Alit Fajar Firmansyah Fatmawati Fatmawati Febe Niken Damayanti G M Arya Sasmita Gede Anantaswarya Abhisena Gede Suryawan, Gede Gunawan, I Kadek Gunawan, I Putu Gus Arisna, I Wayan Gusti Agung Ayu Putri Hary Susila, Anak Agung Ngurah I Gede Aditya Nugraha I Gede Bagus Premana Putra I Gede Bagus Premana Putra I Gede Sugita Aryandana I Gede Sumiarta Adinata I Gede Wira Yudha Lesmana I Gusti Agung Oka Widiarsana I Gusti Made Satriya Wibawa I Gusti Ngurah Wira Dharma I Kadek Ari Melinia Antara I Kadek Gunawan I Kadek Owen Nirvana Kaskora I Kadek Teo Prayoga Kartika I Ketut Adi Purnawan I Ketut Gede Darma Putra I ketut Gede Darma Putra I Ketut Gede Darma Putra I Ketut Suweca, I Ketut I Komang Surya Nata Negara, I Komang Surya I Made Agus Dwi Suarjaya I Made Budi Sentana I Made Indrayana, I Made I Made Oka Widyantara I Made Rama Pradana I Made Rian Suputra I Made Sunia Raharja I Made Sunia Raharja, I Made Sunia I Made Suwija Putra I Made Wahyu Saputra I Nyoman Piarsa I Nyoman Satria Paliwahet I Putu Ade Ambara Putra I Putu Agastya Harta Pratama I Putu Agung Bayupati I Putu Agus Eka Darma Udayana I Putu Agus Eka Darma Udayana, I Putu Agus Eka I Putu Arya Dharmaadi I Putu Arya Dharmadi I Wayan Wahyu Gautama Ida Ayu Putu Wipra Astiti Ida Bagus Ananda Paramartha Indra Dwi Cahya Setyawan Jo, Minho Juli Astuti, Ni Putu Kadek Alit Sudiyana Kadek Ayu Fitri Aryanti Kadek Suar Wibawa Kadek Wahyu Mega Duta Kadek Yartono Ketut Gede Darma Putra, I Ketut Yudhi Mahartha Komang Budiarta Kristiani Br Munthe Kurniawan, Laurensius Adi Kusnanda, I Gede Ryoga Laurensius Adi Kurniawan Lie Jasa Linggar Sukarta, Erlangga Bayu Made Kembar Sri Budhi Made Sudarma Made Sudarma Made Sudarma Mahaputra, Pande Bagus Narendra Mahayasih, Ni Putu Putri Chintyadewi Mahendra, Wayan Dony Minho Jo Minho Jo Muhammad Febrian Rachmadhan Amri Naser Jawas Naser Jawas Ngakan Nyoman Pandika Pinata Ni Kadek Ayu Anggraeni Ni Kadek Yuliastin Ni Luh Gede Pivin Suwirmayanti, S.Kom, MT, Ni Luh Gede Pivin Ni Made Ayu Krisna Cahyadi Ni Made Ika Marini Mandenni Ni Made Suasti Wulanyani Ni Nyoman Yoni Try Jayanti, Ni Nyoman Ni Nyoman Yuliarmi Ni Putu Sutramiani Ni Wayan Wisswani Ni Wayan Wisswani Ni Wayan Wisswani Ni Wayan Wisswani Nugraha, Putu Tulus Nur, Adji Mochamad Nyoman Putra Sastra Pradipta, Oka Ananta Pranata, I Nyoman Krisna Prasetyo, Ryan Teguh PRAWIRA, I WAYAN KARANG YUDHA Puteri, Dina Wahyuni Putra Pinajeng, I Kadek Trio Putra, I Made Suwija Putra, Krishna Mahendra Putri Shinta Dewi Putu Gede Arya Sumertha Yasa Putu Gede Arya Sumertha Yasa Putu Oka Yudiantara Putu Putri Wrestra Saridewi Putu Satya Saputra Putu Wira Buana Redemta Bunga, Redemta Ricky Aurelius Nurtanto Diaz Ricky Aurelius Nutanto Diaz, Ricky Aurelius Rika Hari Wahyuni Riza Afriza Islami Rocky Oktaviano Rukmi Sari Hartati Rusjayanthi, Ni Kadek Dwi Sang Made Muryawan Santiari, Desak Made Saputra, Gede Rizky Chandra Saraswati, Ni Wayan Sumartini Sri Ambar Pratiwi Suarnata, I Gede Sudana, A.A. Kompiang Oka Sunia Raharja, I Made Susila, Anak Agung Ngurah Hary Sweta, I Nyoman Umbaraditha, Kadek Satria Utama, I Putu Juliarta Arya Wayan Dony Mahendra Wirayuda, I Made Bagus Surya Wisswani, Wayan Yudi Pratistha, Pande Made