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All Journal JURNAL INSTEK (Informatika Sains dan Teknologi) Jurnal Fisika dan Terapannya
FITRIYANTI FITRIYANTI
UIN Alauddin Makassar
Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Engineering Physics

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APLIKASI JARINGAN SYARAF TIRUAN PADA PENGENALAN POLA LARIK SENSOR GAS (IDENTIFIKASI KEASLIAN MINYAK ATSIRI) FITRIYANTI FITRIYANTI; NURUL FUADI; HERNAWATI HERNAWATI
Jurnal INSTEK (Informatika Sains dan Teknologi) Vol 4 No 2 (2019)
Publisher : Department of informatics engineering Faculty of Science and Technology Universitas Islam Negeri Alauddin, Makassar, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2440.974 KB) | DOI: 10.24252/instek.v4i2.11585

Abstract

Penelitian ini dilakukan untuk mempelajari Jaringan Syaraf tiruan (JST) dengan metode Backpropagation. Data yang digunakan adalah data sekunder yang berupa senyawa volatile minyak atsiri dengan berbagai kosentrasi, yang merupakan hasil dari keluaran larik sensor gas. Penelitian dilakukan dengan mencari arsitektur dari Backpropagation yang terbaik. Hasil pengujian yang terbaik yaitu menggunakan fungsi aktivasi Sigmoid Bipolar, laju pembelajaran (learning rate) = 0.03, menggunakan 5 hidden layer dengan fungsi pelatihan Gradient descent, untuk bobot dan bias digunakan nilai acak. Iterasi terhenti saat sistem JST telah memenuhi error terkecil yaitu sebanyak 1000 iterasi. Tingkat akurasi dari JST Backpropagation yang telah dibangun yaitu sebesar 91.76% dalam mengenali data latih, dan mengidentifikasi setiap data uji dengan tingkat akurasi rata-rata sebesar 97.86% Kata kunci : , Backpropagation, Jaringan Syaraf Tiruan, Sensor Gas
ANALISIS NILAI ABSORBANSI UNTUK MENENTUKAN KADAR FLAVONOID DAUN JARAK MERAH (JATROPHA GOSSYPIFOLIA L.) MENGGUNAKAN SPEKTROFOTOMETER UV-VIS Ahriani Ahriani; Sri Zelviani; Hernawati Hernawati; Fitriyanti Fitriyanti
JFT : Jurnal Fisika dan Terapannya Vol 8 No 2 (2021): DESEMBER
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v8i2.23379

Abstract

Research on Absorbance Value Analysis on Determination of Flavonoid Levels in Red Jatropha Leaves (Jatropha Gossypifolia L.) using UV-Vis Spectrophotometer has been conducted. This study aimed to determine the absorbance of red jatropha (Jatropha Gossypifolia L.) leaves on young and old leaves and to determine the flavonoid content of red jatropha (Jatropha Gossypifolia L.) leaves on young and old leaves. The sample used in this study was 200 g of red jatropha leaf powder (Jatropha Gossypifolia L.) with the addition of 2000 ml of 70% ethanol as solvent in a ratio of 1:10. The extraction method used in this study is the MAE (Microwave Assisted Extraction) method to measure the absorbance value of the sample at a wavelength of 436 nm using a UV-Vis spectrophotometer. The results showed that the absorbance value of red jatropha (Jatropha Gossypifolia L.) leaves on young leaves was smaller than on old leaves. Where the absorbance value in young leaves is 0.355 while the absorbance value in old leaves is 0.616. The resulting absorbance value has complied with Lambert-Beer's law (0.2 ≤ A < 0.8). The flavonoid content of red jatropha (Jatropha Gossypifolia L.) leaves in young leaves was lower than in old leaves. Where the levels of flavonoids in young leaves is 2.71% while the levels of flavonoids in old leaves is 4.90%. This shows that the greater the absorbance value, the greater the flavonoid content produced.
Co-Authors Ahriani Ahriani HERNAWATI HERNAWATI Nurul Fuadi Sri Zelviani