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Supiyati .
Universitas Bengkulu
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Journal : Jurnal Fisika FLUX

 1 
Analisis Tingkat Kecepatan Korosi Besi dengan Menggunakan Sinar Gamma Lubis, Ashar Muda; Supiyati, Supiyati
Jurnal Fisika FLUX Vol 6, No 2 (2009): Jurnal Fisika Flux Edisi Agustus 2009
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/flux.v6i2.3058

Abstract

In order to examinate rate of iron corrosion, we have conducted aresearch using apparatus Geiger-Muller Tube with sources radiation standardCo-60 as a source of Gamma ray. The samples, iron plate with diameter 2 cmand thichness 0.13 cm, were corroded by various media of corrosion i.e. water(H2O), solution of salt (NaCl) and sulphuric acid (H2SO4) with interval timecorrosion ± 5 days, 10 days, 15 days, 20 days, and 25 days. Firstly, weestimated intensity of Gamma ray before (Io) and after (I) passing through thesamples, and then we evaluated the absorption coefficient of samples. Weobtained that equation of absorption coefficient is A (water) = 0.0014t – 0.4608;R2 = 0.9184, A (salt solution) = 0.0015t – 0.4589; R2 = 0.8886 and A (sulphuricacid) = 0.0017t – 0.4532; R2 = 0.780. We calculated that the rate of corrosion forwater, salt solution and sulphuric acid is 0.0014 gr/cm2/day, 0.0015 gr/cm2/dayand 0.0017 gr/cm2/day respectively. The result shows the rate of corrosioncaused by sulphuric acid larger than corroded by salt and water. In addition, therates of corrosion of iron depend on interval time of corroding iron plate andmedia of corrosion. Another factor which may be related to rate of iron corrosionsuch as temperature, humidity and concentration of media of corrosion should beconsidered for next future.
Prediksi Jangka Pendek Debit Aliran Irigasi Seluma dengan Menggunakan Jaringan Syaraf Tiruan Supiyati, Supiyati; Bahri, Syamsul; Erdi, Iwan
Jurnal Fisika FLUX Vol 6, No 2 (2009): Jurnal Fisika Flux Edisi Agustus 2009
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/flux.v6i2.3057

Abstract

Penelitian mengenai prediksi jangka pendek debit aliran irigasiSeluma dengan menggunakan jaringan syaraf tiruan telah dilakukan. Perangkatlunak dibuat dengan Matlab, dan untuk arsitektur jaringannya menggunakanmetode propagasi balik. Penelitian ini bertujuan untuk memperkirakan debitaliran irigasi jangka pendek, debit bulan atau tahun yang akan datang yangnantinya bisa diolah sebagai acuan peningkatan daerah irigasi tersebut. Darihasil penelitian debit aliran irigasi terbesar terjadi pada bulan Desember denganketinggian 72,75 m3/s sedangkan untuk debit paling kecil terjadi pada bulan Junidengan besar debit 24,71 m3/s. Perbedaan hasil prediksi dengan data lapanganmemiliki keakuratan data 82,80%.
Analisis Tingkat Kecepatan Korosi Besi dengan Menggunakan Sinar Gamma Ashar Muda Lubis; Supiyati Supiyati
Jurnal Fisika FLUX Vol 6, No 2 (2009): Jurnal Fisika Flux Edisi Agustus 2009
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (69.003 KB) | DOI: 10.20527/flux.v6i2.3058

Abstract

In order to examinate rate of iron corrosion, we have conducted aresearch using apparatus Geiger-Muller Tube with sources radiation standardCo-60 as a source of Gamma ray. The samples, iron plate with diameter 2 cmand thichness 0.13 cm, were corroded by various media of corrosion i.e. water(H2O), solution of salt (NaCl) and sulphuric acid (H2SO4) with interval timecorrosion ± 5 days, 10 days, 15 days, 20 days, and 25 days. Firstly, weestimated intensity of Gamma ray before (Io) and after (I) passing through thesamples, and then we evaluated the absorption coefficient of samples. Weobtained that equation of absorption coefficient is A (water) = 0.0014t – 0.4608;R2 = 0.9184, A (salt solution) = 0.0015t – 0.4589; R2 = 0.8886 and A (sulphuricacid) = 0.0017t – 0.4532; R2 = 0.780. We calculated that the rate of corrosion forwater, salt solution and sulphuric acid is 0.0014 gr/cm2/day, 0.0015 gr/cm2/dayand 0.0017 gr/cm2/day respectively. The result shows the rate of corrosioncaused by sulphuric acid larger than corroded by salt and water. In addition, therates of corrosion of iron depend on interval time of corroding iron plate andmedia of corrosion. Another factor which may be related to rate of iron corrosionsuch as temperature, humidity and concentration of media of corrosion should beconsidered for next future.
Prediksi Jangka Pendek Debit Aliran Irigasi Seluma dengan Menggunakan Jaringan Syaraf Tiruan Supiyati Supiyati; Syamsul Bahri; Iwan Erdi
Jurnal Fisika FLUX Vol 6, No 2 (2009): Jurnal Fisika Flux Edisi Agustus 2009
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (50.553 KB) | DOI: 10.20527/flux.v6i2.3057

Abstract

Penelitian mengenai prediksi jangka pendek debit aliran irigasiSeluma dengan menggunakan jaringan syaraf tiruan telah dilakukan. Perangkatlunak dibuat dengan Matlab, dan untuk arsitektur jaringannya menggunakanmetode propagasi balik. Penelitian ini bertujuan untuk memperkirakan debitaliran irigasi jangka pendek, debit bulan atau tahun yang akan datang yangnantinya bisa diolah sebagai acuan peningkatan daerah irigasi tersebut. Darihasil penelitian debit aliran irigasi terbesar terjadi pada bulan Desember denganketinggian 72,75 m3/s sedangkan untuk debit paling kecil terjadi pada bulan Junidengan besar debit 24,71 m3/s. Perbedaan hasil prediksi dengan data lapanganmemiliki keakuratan data 82,80%.
Co-Authors Agustin, Rika Amelia Alfan Sukmana Praja Alfando, Andre anjasman, anjasman Anwar, Anang Ari Anggoro Ashar Muda Lubis Asteriqa, Mica Astuti, Nissa Azhari, M Fikri Bambang Sulistyo Baringin, Rolando Berliani, Riska Chandra Kurniawan, Chandra Dari, Evita Sri Wulan Deddy Bakhtiar Deddy Bakhtiar, Deddy Desrina Saragih, Rika Devi Permata Sari Elfi Yuliza Elisa, Imania Elmiati Elmiati Erdi, Iwan Erwina, Yuyun Gita Rahma Sari Gunawan, Nur Aini Hairunnisa Norfahmi, Siti Halauddin Halauddin Halauddin Halauddin Halauddin Harlianto, Budi Helfi Eka Saputra Henny Johan Hestyna Eka Putri Ichsan Setiawan Ima Maisaroh Irkhos Irkhos Iwan Erdi Johan, Septi Lestari, Wina Ayu Lizalidiawati M Syarifuddin Mehmed, Muhammad Umar Melisa, Wery Mhd Ikhwanuddin Abdullah Mihardja, D. K. Mihardja, D. K. Nanang Sugianto Nasya, Angel Pauline Nissa Astuti Norfahmi, Siti Hairunnisa Ompusunggu, Yordan A Permatasari, Deah Putri, Hestyna Eka Ratmo, Edy Rida Samdara Riska Ekawita Risky Oktami Safitri, Oktari Elha Saputra, Rahmat Setya Pagestu Siregar, Anjeli Agustina Siti Fatimah Soleh Hidayat, Soleh Sudirman Sudirman Suhendra - Suhendra Suhendra Sujanah, Nanah Suprijo, T. Suprijo, T. Suwardi Suwardi Suwardi Suwardi Suwarsono Suwarsono Suwarsono Suwarsono Suwarsono Suwarsono Suwarsono Suwarsono Suwarsono Suwarsono Suwarsono Syamsul Bahri Syamsul Bahri Syaputri, Adinda Hija XXX, SATURN Yosia Pandu S