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All Journal JSI: Jurnal Sistem Informasi (E-Journal) Telematika : Jurnal Informatika dan Teknologi Informasi
Helena Nurramdhani Irmanda
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Computer Science & IT Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Library & Information Science Other

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SPK BERBASIS WEB MENGGUNAKAN LOGIKA FUZZY UNTUK DIAGNOSA PENYAKIT JANTUNG Ria Astriratma; Mayanda Mega Santoni; Helena Nurramdhani Irmanda
Jurnal Sistem Informasi Vol 12, No 2 (2020)
Publisher : Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (439.705 KB) | DOI: 10.36706/jsi.v12i2.10788

Abstract

Penelitian ini dilakukan untuk membuat sebuah sistem pengambilan keputusan berbasis web menggunakan logika fuzzy untuk mendiagnosa penyakit jantung pada seseorang. Untuk membangun sistem ini digunakan Fuzzy Inference System dari pengetahuan yang ada pada dokter sehingga diperoleh aturan (rule) untuk melakukan diagnosa. Langkah pada Fuzzy Inference System yaitu Fuzzifier, Fuzzy Inference Engine dan Defuzzifier. Fungsi keanggotaan segitiga dan trapesium digunakan untuk mendapatkan nilai derajat keanggotaan pada setiap variabel. Root Sum Square (RSS) digunakan untuk mendapatkan nilai fuzzy dari aturan yang memenuhi kondisi suatu pasien. Nilai RSS yang diperoleh akan dipetakan ke nilai tunggal (crisp) dengan menggunakan teknik Centroid of Area (CoA) untuk mendapatkan hasil diagnosa penyakit jantung. Penelitian ini menggunakan dataset Cleveland dari Machine Learning Repository. Hasil diagnosa pada sistem ini menghasilkan akurasi 64% dengan tingkat sensitivitas sebesar 89.83% dan tingkat spesifisitas sebesar 73.17%. Kata kunci: SPK, Logika Fuzzy, Diagnosa Jantung
Sentiment Analysis of Cryptocurrency Exchange Application on Twitter Using Naïve Bayes Classifier Method Andhika Octa Indarso; Helena Nurramdhani Irmanda; Ria Astriatma
Telematika Vol 20, No 1 (2023): Edisi Februari 2023
Publisher : Jurusan Informatika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/telematika.v20i1.9044

Abstract

Purpose: The growth and development of the digital currency industry also presents a variety of applications for conducting transactions using these currencies, including utilizing cryptocurrency exchanges to make investments. InI ndonesia, there are two applications that fall into the category of the largest cryptocurrency exchange and are recognized by Bappebti (Commodity Futures Trading Regulatory Agency), namely TokoCrypto and Indodax. Both applications are analyzed based on the sentiments of their users on Twitter.Design/methodology/approach: In this study the data collected is data originating from social media Twitter and has the keywords "indodax" or "#indodax" and "tokocrypto" or "#tokocrypto". The data used is between January 2021 – January 2022. The data collected from Twitter is processed using the Naïve Bayes Classifier algorithm.Findings/result: From the results of the analysis, it was found that the Indodax application has a higher positive sentiment percentage value of 9% compared to TokoCrypto.Originality/value/state of the art: The use of the Naïve Bayes algorithm in this study supports sentiment analysis of cryptocurrency exchange application users to consider which application has better positive sentiment for investing in digital currency or cryptocurrency.
Co-Authors Andhika Octa Indarso Ria Astriatma Ria Astriratma Santoni, Mayanda Mega