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All Journal Jurnal TIMES Scientific Journal of Informatics
Morina, Irene Sri
STMIK TIME
Computer Science & IT

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Klusterisasi Pola Penyebaran Penyakit Pasien Berdasarkan Usia Pasien Dengan Menggunakan K-Means Clustering Silitonga, Parasian; Morina, Irene Sri
Jurnal TIMES Vol 6, No 2 (2017)
Publisher : STMIK TIME

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (193.536 KB)

Abstract

Data mining merupakan suatu proses yang dapat digunakan untuk menemukan hubungan yang berarti dari sekumpulan data dengan memeriksa data yang tersimpan dalam media penyimpanan dengan menggunakan teknik pengenalan pola seperti teknik statistik dan matematika. Salah satu teknik pada data mining adalah teknik clustering. Teknik clustering merupakan teknik pengelompokkan record pada basis data berdasarkan kriteria tertentu. Tujuan dari penelitian ini adalah untuk menemukan pola kecenderungan penyakit pasien berdasarkan kelompok usia pasien. Penelitian ini dilakukan dengan menggunkan metode K-Means Clustering yang diimplementasikan pada data pasien pada suatu periode tertentu.
Compression and Decompression of Audio Files Using the Arithmetic Coding Method Silitonga, Parasian D. P; Morina, Irene Sri
Scientific Journal of Informatics Vol 6, No 1 (2019): Mei 2019
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/sji.v6i1.17839

Abstract

Audio file size is relatively larger when compared to files with text format. Large files can cause various obstacles in the form of large space requirements for storage and a long enough time in the shipping process. File compression is one solution that can be done to overcome the problem of large file sizes. Arithmetic coding is one algorithm that can be used to compress audio files. The arithmetic coding algorithm encodes the audio file and changes one row of input symbols with a floating point number and obtains the output of the encoding in the form of a number of values greater than 0 and smaller than 1. The process of compression and decompression of audio files in this study is done against several wave files. Wave files are standard audio file formats developed by Microsoft and IBM that are stored using PCM (Pulse Code Modulation) coding. The wave file compression ratio obtained in this study was 16.12 percent with an average compression process time of 45.89 seconds, while the average decompression time was 0.32 seconds.
Co-Authors Parasian D.P Silitonga Silitonga, Parasian D. P