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All Journal Jurnal Edukasi dan Penelitian Informatika (JEPIN) Journal of Information Systems Engineering and Business Intelligence Indonesia Symposium on Computing Indonesian Journal on Computing (Indo-JC) IJoICT (International Journal on Information and Communication Technology) JOIN (Jurnal Online Informatika) International Journal of Artificial Intelligence Research JURNAL MEDIA INFORMATIKA BUDIDARMA JITTER (Jurnal Ilmiah Teknologi Informasi Terapan) eProceedings of Engineering
Rita Rismala
Universitas Telkom
Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Journal : Indonesian Journal on Computing (Indo-JC)

 1 
Implementation of Evolution Strategies for Classifier Model Optimization Mahmud Dwi Sulistiyo; Rita Rismala
Indonesia Journal on Computing (Indo-JC) Vol. 1 No. 2 (2016): September, 2016
Publisher : School of Computing, Telkom University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21108/INDOJC.2016.1.2.43

Abstract

Classification becomes one of the classic problems that are often encountered in the field of artificial intelligence and data mining. The problem in classification is how to build a classifier model through training or learning process. Process in building the classifier model can be seen as an optimization problem. Therefore, optimization algorithms can be used as an alternative way to generate the classifier models. In this study, the process of learning is done by utilizing one of Evolutionary Algorithms (EAs), namely Evolution Strategies (ES). Observation and analysis conducted on several parameters that influence the ES, as well as how far the general classifier model used in this study solve the problem. The experiments and analyze results show that ES is pretty good in optimizing the linear classification model used. For Fisher’s Iris dataset, as the easiest to be classified, the test accuracy is best achieved by 94.4%; KK Selection dataset is 84%; and for SMK Major Election datasets which is the hardest to be classified reach only 49.2%.
Analisis dan Implementasi Imputation-Boosted Neighborhood-Based Collaborative Filtering Menggunakan Genre Film Rita Rismala
Indonesia Journal on Computing (Indo-JC) Vol. 2 No. 1 (2017): Maret, 2017
Publisher : School of Computing, Telkom University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21108/INDOJC.2017.2.1.50

Abstract

Sistem rekomendasi adalah sebuah sistem yang mampu memberikan rekomendasi sejumlah item kepada user dengan memprediksi rating terhadap item berdasarkan minat user. Neighborhood-based collaborative filtering adalah salah satu metode pada Sistem Rekomendasi untuk melakukan perhitungan prediksi rating. Akan tetapi, neighborhood-based collaborative filtering tidak mampu memberikan prediksi rating yang akurat ketika data rating yang ada bersifat sparse atau memiliki banyak kekosongan. Kekosongan data mengakibatkan perhitungan similarity antar user atau item menjadi kurang tepat, yang berakibat pada pemilihan neighbor dan perhitungan prediksi yang tidak tepat pula. Salah satu solusi adalah melakukan imputasi yaitu proses pengisian awal terhadap data dengan metode tertentu. Dengan memanfaatkan feature item berupa genre, dilakukan imputasi terhadap data untuk selanjutnya digunakan oleh neighborhood-based collaborative filtering. Penelitian ini berfokus pada penerapan proses imputasi terhadap neighborhood-based collaborative filtering dan menganalisis pengaruhnya terhadap performansi. Hasil yang diperoleh adalah proses imputasi meningkatkan performansi akurasi prediksi rating pada dataset dengan sparsity 85%, dan peningkatan performansi yang terukur menjadi semakin besar seiring semakin sparse dataset yang ada.
Analisis dan Implementasi pendekatan Hybrid untuk Sistem Rekomendasi Pekerjaan dengan Metode Knowledge Based dan Collaborative Filtering Sari Rahmawati; Dade Nurjanah; Rita Rismala
Indonesia Journal on Computing (Indo-JC) Vol. 3 No. 2 (2018): September, 2018
Publisher : School of Computing, Telkom University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21108/INDOJC.2018.3.2.210

Abstract

Mencari pekerjaan secara online dapat menjadi kendala tersendiri baik pada pada pelamar pekerjaan maupun pada perusahaan yang mencari karyawan. Saat ini banyak pelamar dan perusahaan lebih memilih menggunakan situs rekruitasi online dibandingkan mencari dengan menggunakan mesin pencari. Recommender system menjadi salah satu kelebihan dari website rekruitasi karena website menyimpan informasi profil pekerja lalu memberikan rekomendasi sesuai dengan data yang mereka dapatkan. Pada penelitian ini penulis membuat hybrid recommender system dengan menggabungkan dua teknik yaitu knowledge based recommender system yang akan merekomendasikan pekerjaan berdasarkan profil user, kualifikasi pekerjaan dan pengaruh dari user lain yang akan memberikan rekomendasi pekerjaan berdasarkan user lain yang memiliki kesamaan. Hasil prediksi dari 2 metode itu akan digabungkan berdasarkan social aperture yang diberikan. Berdasarkan hasil pengujian hybrid recommender system memberikan hasil terbaik untuk memprediksi interaksi dan memberikan rekomendasi berdasarkan hasil RMSE dan f1 score.
Pairwise Preference Regression on Movie Recommendation System Rita Rismala; Rudy Prabowo; Agung Toto Wibowo
Indonesia Journal on Computing (Indo-JC) Vol. 4 No. 1 (2019): Maret, 2019
Publisher : School of Computing, Telkom University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21108/INDOJC.2019.4.1.255

Abstract

Recommendation System is able to help users to choose items, including movies, that match their interests. One of the problems faced by recommendation system is cold-start problem. Cold start problem can be categorized into three types, they are: recommending existed item for new user, recommending new item for existed user, and recommending new item for new user. Pairwise preference regression is a method that directly deals with cold-start problem. This method can suggest a recommendation, not only for users who have no historical rating, but also for those who only have less demographic info. From the experiment result, the best score of Normalized Discounted Cumulative Gain (nDGC) from the system is 0.8484. The standard deviation of rating resulted by the recommendation system is 1.24, the average is 3.82. Consequently, the distribution of recommendation result is around rating 5 to 3. Those results mean that this recommendation system is good to solving cold-start problem in movie recommendation system.
Eye State Prediction Based on EEG Signal Data Neural Network and Evolutionary Algorithm Optimization Untari Novia Wisesty; Hifzi Priabdi; Rita Rismala; Mahmud Dwi Sulistiyo
Indonesia Journal on Computing (Indo-JC) Vol. 5 No. 1 (2020): Maret, 2020
Publisher : School of Computing, Telkom University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34818/INDOJC.2020.5.1.372

Abstract

Eye state prediction is one study using EEG signals obtained to predict the state of the human eye several moments before. In its development, many researchers also have built eye states detection schemes, but the system built is only limited to classifying one record of input data obtained from the Emotive EPOC headset channel into the eye state. Therefore, this paper proposed eye state prediction system where the system can predict the state of the human eye some time previously based on the EEG signal series used. The proposed system consists of two parts, namely the prediction of the EEG signal value and eye state detection based on the value of the signal that has been obtained using Differential Evolution and Neural Network optimized by Evolution Strategies, respectively. The highest accuracy obtained from the eye state prediction system that has been built is 73.2%. These results are obtained by the best combination of parameters from the three methods used.
Apriori Association Rule for Course Recommender system Fakhri Fauzan; Dade Nurjanah; Rita Rismala
Indonesia Journal on Computing (Indo-JC) Vol. 5 No. 2 (2020): September, 2020
Publisher : School of Computing, Telkom University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34818/INDOJC.2020.5.2.434

Abstract

Until recently, recommender systems have been applied in learning, such as to recommend appropriate courses. They are based on users’ ratings, learning history, or curriculum that provide relationship between courses. The last approach, however, can’t be applied to Massive Open Online Courses (MOOCs) that don’t maintain such information. Hence, course recommender systems for MOOCs must be based on other learners’ experience. This paper discusses such recommender systems. We apply Apriori Association Rule and the case study used in this study is the Canvas Network dataset and the HarvardX-MITx dataset. The proposed recommender system consists of a pre-processing to normalize data and reduce anomalous data, data cleaning to handle empty data, K-Modes clustering to group users, grouping registration transactions for filtering user registration transaction, and finally, rule formation using the Apriori Association Rule. The performance of the association rules obtained, a lift ratio evaluation metric is used. The experiments results show the best parameters in this study are 0.01 for minimum support and 0.6 for minimum confidence. With these two parameters, the number of rules and the average lift ratio value on the Canvas Network dataset are 110 rules and 19.055, while the HarvardX-MITx dataset is 48 rules and 3.662.
Co-Authors Ade Romadhony Agung Toto Wibowo Al Faraby, Said Alfredo Alfredo Anditya Arifianto Arby Fahrizi Subiyanto Arief Hutauruk Bobby Brillian Yerikho Dade Nurjanah Dimitri Mahayana Eko Darwiyanto Fahrudin Julianto Fakhri Fauzan Febryanti Sthevanie Fikri Bahiransyah Hasna Haifa Zahrah Hifzi Priabdi Hilmi Eko Arianto Iqbal Dwihanandrio Jondri Jondri Kadek Byan Prihandana Jati Kadek Byan Prihandana Jati Kridanto Surendro Kurniawan Nur Ramadhani Ledya Novamizanti Lugina Muhammad Mahmud Dwi Sulistiyo Mohammad Fathurrahman Muhammad Hanif Oktavianto Nur Ulfa Maulidevi Parjuangan, Sabam Ramadhan, Sageri Fikri Retno Novi Dayawanti Retno Novi Dayawati Rudy Prabowo Sari Rahmawati Serli Fatriandini Serli Fatriandini Shendy Murty Siti Sa’adah Tjokorda Agung Budi Wirayuda Untari Novia Wisesty YUYUN SITI ROHMAH Zaki Mudzakir Hidayatullah ZK Abdurahman Baizal