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Jurnal Ilmu Fisika
Published by Universitas Andalas
ISSN : 19794657     EISSN : 26147386     DOI : -
Core Subject : Science,
Astronomy Earth & Planetary Sciences Materials Science & Nanotechnology Physics
Jurnal Ilmu Fisika (JIF) is a peer-reviewed open access journal on interdisciplinary studies of physics, and is published twice a year (March and September) by Department of Physics, Andalas University Padang.
Arjuna Subject : -
Articles 449 Documents
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Identification of Sand Mineral Content at Beach Tourist Attractions in Sampang Regency through X-Ray Fluorescence and X-Ray Diffraction Testing Joni, Idon; Ariyanto, Sandi Vikki
Jurnal Ilmu Fisika Vol 13, No 1 (2021): Published in March 2021
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jif.13.1.26-33.2021

Abstract

Research on the natural mineral content in Sampang Regency has been conducted, namely Camplong Beach, Nepa Beach, and Mandangin Island. The XRF results show that the silica mineral content in Camplong sand at a depth of 0.5 m, 1 m, and 1.5 m are 54.6%, 53.2%, and 57.0%, respectively. Nepa sand shows the highest mineral content is calcium. The calcium content at a depth of 0.5 m, 1 m, and 1.5 m are 51.7%, 58.3%, and 63.0%, respectively. Mandangin Island sand shows the highest calcium content that are 94.69%, 94.65%, and 94.98%, at a depth of 0.5 m, 1 m, and 1.5 m, respectively. XRD test results show that in Camplong sand at a depth of 0.5 m, 1 m, and 1.5 m, SiO2 phase < 94% is formed. In Nepa sand at a depth of 0.5 m, 1 m, and 1.5 m, the SiO2 phase < 80% is formed. For Mandangin Island beach sand with a depth of 0.5 m, 1 m, and 1.5 m, the CaCO3 phase > 90% is formed. This study's results can determine the mineral content of sand, which can be used as a high-tech material to minimize illegal mining.
Penerapan Gelombang Plasma dalam Mengurangi Kadar Chemical Oxygen Demand (COD) pada Limbah Batik Melalui Corona Plasma dan Elektrokoagulasi dengan Metode Variasi Putra, Valentinus Galih Vidia; Mohamad, Juliany Ningsih; Yusuf, Yusril
Jurnal Ilmu Fisika Vol 12, No 2 (2020): Published in September 2020
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jif.12.2.60-69.2020

Abstract

Proses pengolahan limbah tekstil umumnya dapat berupa limbah dari proses penghilangan kanji (Desizing), penggelantangan (Scouring), pemutihan (Bleaching), dan pencelupan kain (Dyeing) serta proses pewarnaan dan pembilasan yang menghasilkan air limbah berwarna dengan COD yang tinggi. Dikarenakan kompleksitas jenis limbah tekstil, maka pemilihan metode pengolahan limbah merupakan suatu tantangan tersendiri dalam penelitian oleh beberapa peneliti. Artikel ini memperlihatkan beberapa metode pengolahan limbah dengan menggunakan metode elektrokoagulan (EC), metode plasma dan gabungan metode plasma dan elektrokoagulan. Hasil riset memperlihatkan bahwa pengabungan metode plasma dan elektrokoagulan akan lebih baik dalam penguraian air limbah dengan indikator menurunnya COD pada limbah (sebesar 240mgO2/L hingga 250 mgO2/L). Efisiensi pada metode plasma-elektrokoagulasi sebesar 42,5% - 44,8%.
Effect of Citric Acid on Electrochemical Properties of Liquid Electrolytes Noor, Nur Farah Izzati Mohd; Saidin, Saiyidah Nafisah; Ra’il, Nur Hani; Mobarak, Nadhratun Naiim
Jurnal Ilmu Fisika Vol 13, No 2 (2021): Published in September 2021 (COMING ISSUE)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jif.13.2.80-91.2021

Abstract

Effect of citric acid as plasticizer on the electrochemical properties of liquid electrolyte has been studied. Liquid electrolyte was prepared by dissolving citric acid in 1% acetic acid with presence of lithium nitrate salt. Liquid electrolyte is characterized using a conductivity meter to measure the ionic conductivity value. Computer simulation of Density Functional Theory (DFT) with B3LYP/6-31G ++ (d, p) basic set was performed to identify the dominant functional group of citric acid when interact with lithium salt. Increasing the weight of citric acid has increased the ionic conductivity up to 44.89 mS/cm with an optimum weight of 4 g, while the ionic conductivity increases up to 43.00 mS/cm when the percentage of lithium nitrate salt increases up to 30%. The ionic conductivity increases as the salt percentage increases due the interaction between salt and functional group of citric acid. Based on computer simulation of DFT,  the dominant functional group in citric acid that interact with lithium salt are carboxylic acid group which is located in the middle of the citric acid chain causing lithium ions to be more likely interact with citric acid.
Analisis Pelemahan Multipel pada Data 2D Seismik Laut “IS” dengan Metode Transformasi Radon Permatasari, Indah; Hedriana, Oki
Jurnal Ilmu Fisika Vol 12, No 2 (2020): Published in September 2020
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jif.12.2.79-88.2020

Abstract

Multipel termasuk noise pada data seismik laut yang mengganggu dalam interpretasi sehingga perlu untuk diminimalisir keberadaannya. Multipel dapat menimbulkan ambiguitas pada data seismik laut sehingga tidak dapat menggambarkan kondisi bawah permukaan yang sebenarnya. Salah satu metode yang digunakan untuk penelitian ini adalah metode transformasi radon yang bertujuan untuk melemahkan multipel. Pada penelitian ini diperoleh data seismik laut “IS” terdapat  water bottom multiple  pada time 600 - 1400 ms dengan waktu tempuh dua kali lipat dari waktu seabed.  Hasil yang diperoleh setelah diterapkan metode transformasi radon menunjukkan multipel dapat terlemahkan dengan baik sehingga penampang seismik dapat menggambarkan kondisi bawah permukaan yang sebenarnya.
Application of Complementary Split Ring Resonator for Hyperthermia Yusri, Rahmawati; Muldarisnur, Muldarisnur
Jurnal Ilmu Fisika Vol 13, No 1 (2021): Published in March 2021
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jif.13.1.34-40.2021

Abstract

One of the most promising research for cancer therapy with less side effects is hyperthermia treatment using metamaterial. This treatment may stand independently or adjunct to other cancer treatments such as chemotherapy, radiotherapy, and others. Metamaterial may control the heating process needed and also the depth of metamaterial itself from the skin surface. In this simulation, complementary split-ring resonator (cSRR) metamaterial with gaps from 0.5 to 3.5 mm can be used for the hyperthermia treatment. In the simulation of the cSRR metamaterial as hyperthermia therapy for cancer cells, the heat generated from each cSRR model was not significantly different. All cSRR models can reach hyperthermal temperatures under 5 minutes. The highest temperature achievement after 60 minutes can be seen in the use of single gap cSRR (58.9 ℃), dual gaps cSRR (58.1 oC), triple gaps cSRR (57.5 ℃), and quad gaps cSRR (57.2 ℃). The cSRR metamaterial structure can be used for hyperthermia therapy by adjusting the treatment duration treatment on cancer cells.
Tingkat Energi Pada Osilator Anharmonik 1 Dimensi Menggunakan Metode Perturbasi Orde 2 Zen, Nur Afifah; Nuraini, Rany
Jurnal Ilmu Fisika Vol 12, No 2 (2020): Published in September 2020
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jif.12.2.70-78.2020

Abstract

Penentuan tingkat energi dari potensial osilator anharmonik dapat diperoleh dengan berbagai metode pendekatan. Penelitian ini bertujuan untuk menentukan koreksi tingkat energi osilator anharmonik 1 dimensi menggunakan metode perturbasi hingga orde 2 dimana potensial gangguan dianggap berbentuk kuartik . Metode perhitungan orde 2 dilakukan menggunakan gambaran Heseinberg dengan mendefinisikan operator kreasi dan anihilasi untuk mendapatkan koreksi energi pada tingkat tersebut. Berdasarkan perhitungan yang dilakukan, potensial gangguan harus memiliki nilai pada rentang agar metode yang digunakan valid. Perbandingan hasil koreksi tingkat energi perturbasi orde 2 dengan metode numerik dan WKB menunjukkan bahwa semakin tinggi tingkat energi semakin besar persentase error, sehingga metode perturbasi hanya sesuai jika digunakan pada tingkat energi rendah.
Effect of Monosaccharides and Disaccharides Type on Ionic Conductivity of Liquid Electrolyte Based Lithium Iodide Ra'il, Nur Hani; Mobarak, Nadhratun Naiim
Jurnal Ilmu Fisika Vol 13, No 2 (2021): Published in September 2021 (COMING ISSUE)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jif.13.2.70-79.2021

Abstract

Liquid electrolyte was prepared by dissolving glucose, fructose, sucrose and lactose separately with different percentage of lithium iodide (10 – 35%) in aqueous solution of 1% acetic acid. Liquid electrolyte is characterized using conductivity meter to determine ionic conductivity. Computer simulations of Density Functional Theory (DFT) was used to identify the dominant functional groups on monomers such as glucose, sucrose, fructose and lactose when interact with the lithium salt by using B3LYP/6-31G ++ (d, p) basis set. The highest ionic conductivity for monosaccharide is glucose at 28.20 mS/cm while for disaccharide is lactose at 28.00 mS/cm with percentage of salt at 35 wt.%. Ionic conductivity increases when concentration of salt increase because there is an interaction between salt with functional groups of compounds. Based on computer simulations of DFT, interaction between lithium with compounds can be occurred due to negative electrostatic potential on the molecule. Electronegativity value of oxygen atom in glucose (-0.562e) and lactose (-0.567e) higher than fructose (-0.559e) and sucrose (-0.515e). Functional groups that are dominant to interact when interact with lithium salt are O-15 for glucose and O-17 for lactose due to the shorter bond length, the stronger energy attraction between functional groups with lithium.
Characterization of Multiple-bend Optical Fiber Extensometer Design for Landslide Sensor Costrada, Aldo Novaznursyah; Deswilan, Sixtinah; Kemal, Badrul Mustafa; Harmadi, Harmadi
Jurnal Ilmu Fisika Vol 13, No 1 (2021): Published in March 2021
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jif.13.1.1-7.2021

Abstract

Design of multiple-bend extensometer based on optical fiber as landslide sensor has been characterized. Multiple-bending characterization has been done by varying the winding number of optical fiber FD-620-10 to obtain the photodiode's effective light intensity.  The light intensity in the extensometer was set by varying the laser diode resistance in the range (150 – 250) Ω.  The optimum sensitivity of 0.03984 V/cm was obtained for triple winding of optical fiber. The designed optical extensometer is able to monitor the displacement with an error of 0.59%. This result indicates that the designed extensometer is the more bending on optical fiber, the more its sensitivity and the bending loss.
Long-Term Change in Characteristics of Cloud Vertical Structures Over Sumatra from Radiosonde Observations Lismalini, Lismalini; Marzuki, Marzuki; Shafii, Mohammad Ali
Jurnal Ilmu Fisika Vol 13, No 1 (2021): Published in March 2021
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jif.13.1.41-53.2021

Abstract

Study on the vertical structure of cloud in Indonesia in terms of climate change is still very limited. We investigated the long-term change in characteristics of cloud vertical structures over Sumatra from three radiosonde observation stations in this work. The cloud base height (CBH), cloud top height (CT), and the number of cloud layers were retrieved using relative humidity (RH) profiles from radiosonde observation. The height of the cloud base is determined by taking the height of the layer with relative humidity (RH) value > 84% with at least a 3% jump in the RH from the ground level. Sumatra’s most frequently observed cloud layer is a one-layer cloud with an average occurrence rate of > 60%, which is slightly larger than the one-layer cloud globally. The percentage of appearance values at the Padang station, Pangkal Pinang, and Medan are 63.58%, 69.50% and 66.05%. The appearance of low-level clouds also dominates in Sumatra compared to other cloud types. CT and CBH increase with the number of years including all seasons. This is in line with the increase in temperature in Indonesia reported by previous researchers. On the other hand, the clouds’ thickness, especially for the cloud with one layer, varies from one location to another. The thickness of clouds decreases at Padang station and does not change at Pangkal Pinang and Medan stations.
Studi Awal Implementasi Transduser Piezoelektrik sebagai Piranti Pemanen Energi pada Lantai Arimurti, Yesiana; Radiyono, Y; Surantoro, Surantoro
Jurnal Ilmu Fisika Vol 12, No 2 (2020): Published in September 2020
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jif.12.2.89-97.2020

Abstract

Penelitian ini merupakan studi awal implementasi transduser piezoelektrik pada sebuah piranti pemanen energi berupa lantai piezo. Studi awal yang dilakukan yaitu dengan mengukur tegangan yang dihasilkan dari transduser ketika diterapkan tekanan dengan variasi frekuensi dan material piezoelektrik yang digunakan. Pada penelitian ini, transduser piezoelektrik yang digunakan yaitu elemen piezo dari material keramik polikristal dan piezo vibration sensordari meterial PVDF (polyvinylidenfluoride). Tekanan yang diberikan secara periodik divarisi pada 60 bpm (beat per minute), 80 bpm, 100 bpm, 120 bpm, dan 140 bpm dengan bantuan aplikasi metronome. Tegangan diukur dengan menggunakan multimeter digital. Berdasarkan hasil pengamatan, diperoleh nilai tegangan tertinggi pada frekuensi 60 bpm. Sedangkan untuk perbandingan tegangan yang dihasilkan oleh dua material transduser yang berbeda,bahan keramik polikristalin menghasilkan rerata tegangan yang lebih besar daripada material pvdf.Rerata tegangan yang dihasilkan oleh transduser piezoelektrik keramik sebesar 974,4 mV pada frekuensi 60 bpm dan 707,3 mV pada frekuensi 80 bpm

Page 16 of 45 | Total Record : 449

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