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Jurnal Teori dan Aplikasi Fisika
Published by Universitas Lampung
ISSN : 2303016X     EISSN : 25491156     DOI : https://doi.org/10.23960/jtaf.v14i01
Core Subject : Science, Engineering,
Astronomy Electrical & Electronics Engineering Materials Science & Nanotechnology Physics
We invite authors to submit manuscripts of up to 10 pages, prepared in accordance with the author guidelines. The scope of this journal includes, but is not limited to, the following fields: 1. Theoretical Physics Classical Mechanics Electromagnetics Thermodynamics Statistical Mechanics Quantum Mechanics Theory of Relativity Quantum Gravity Astrophysics Cosmology 2. Earth Physics (Geophysics) Geothermal Geoelectrics Seismics Geomagnetics 3. Materials Physics Nanomaterials Metals and Corrosion Magnetic Materials Thin Films Photocatalysts/Catalysts Semiconductors Superconductors Ceramics Polymers 4. Electronics and Instrumentation Sensors Biomedical Instrumentation Agricultural Instrumentation Environmental Instrumentation Biophysics Computational Physics Lasers 5. Nuclear Physics Reactor Safety Neutronic Analysis Fuel and Waste Management
Arjuna Subject : Fisika dan Astronomi - Fisika dan Astronomi (Lain-Lain)
Articles 395 Documents
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Desain dan Karakterisasi Penggunaan Sensor Efek Hall UGN3503 untuk Mengukur Arus Listrik pada Kumparan Johan Wahyudi, Gurum Ahmad Pauzi, Warsito
Jurnal Teori dan Aplikasi Fisika Vol. 1 No. 2 (2013): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v1i2.47

Abstract

Hall effect is a deflection of electricity phenomena (electrons) in the conductor plate because of the magnetic fields effect. UGN3503 is a sensor with Hall effect principle, In this study UGN3503 sensor used to measure the electric current in the coil Leybold P6271 with non destructive method. Microcontroller processing results is an electric current measured by system and displayed on a LCD 20x4 in Amperes. Research data were taken 40 times with variations of the electric current ranging from 1 Amperes to 4,9 Amperes. calculated based on these data the average error that occurred in the measurement gauge amounted to 1,44%. Keywords: Hall Effect, UGN3503, ATMega8535.
Analisa Rugi-Rugi Serat Optik Sebagai Potensi Aplikasi Sensor Weigh In Motion (WIM) Lima Lekukan Deajeng Wulandari, Mohtar Yunianto, Hery Purwanto
Jurnal Teori dan Aplikasi Fisika Vol. 1 No. 2 (2013): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v1i2.48

Abstract

Fiber optic loss yielded from macrobending with fivebending model prototype. The purpose this study is to determine the influence of scratches variation toward the loss as a potential Weigh In Motion (WIM) sensor applications to plastic optical fiber (POF) diameter 0,5mm.. Pressure influence toward POF loss done up to 2 mm shift. LED, as light source, transmits the light through the fiber and received by LDR as detector. The output is voltage displayed on the computer. Pressure caused by a shift made the fiber is depressed and formed fivebending so that the loss is greater. Two scratch, three scratch, without a scratch have applied. The study result show that the more scratches, the loss was greater . Every the loss value caused by giving certain mass. The highest sensitivity when three scratches was applied which has correlation coefficient R2 0,99744 with gradient 1,2264 so this model have has the potential in Weigh In Motion (WIM) sensor applications. Keyword: POF, scratches, five bending, WIM
Penerapan Metode Dinamika Molekul untuk Pembelajaran: Konsep Titik Leleh dan Perubahan Wujud Widiasih, Herawati, Heni Safitri, Artoto Arkundato
Jurnal Teori dan Aplikasi Fisika Vol. 1 No. 2 (2013): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v1i2.49

Abstract

Molecular dynamics method has been applied to model the phase transition of the aluminium (Al). We used the LAMMPS molecular dynamics code to simulate the physical process of the phase transition and observing the dynamics of atoms by using Jmol vizualitation code. From the simulation data we found that the phase transition where the melting point of the material is, can be observed at temperature T = 1059,75 K. In this view we may use the molecular dynamics method as an innovative model of physical learning model in senior high school level, as an alternative of dry lab. Keywords: Molecular dynamics method, Phase transition, Melting point, LAMMPS.
Pengaruh Penambahan MgO Pada SiO2 Berbasis Silika Sekam Padi Terhadap Karakteristik Komposit MgO-SiO2 Dan Kesesuaiannya Sebagai Bahan Pendukung Katalis Reza Pahlepi, Simon Sembiring, Kamisah D. Pandiangan
Jurnal Teori dan Aplikasi Fisika Vol. 1 No. 2 (2013): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v1i2.50

Abstract

Kajian Pengaruh Ketebalan Lapisan P3HT Pada Sel Surya Organik Berbasis Bahan Organik Dan Polimer Fredicha Arya N., Agus Supriyanto, Fahru Nur Rosyid
Jurnal Teori dan Aplikasi Fisika Vol. 1 No. 2 (2013): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v1i2.51

Abstract

Organic solar cells with structure of FTO / PEDOT: PSS/P3HT/Klorofil/Al has been made. Fabrication of the active layer organic solar cells using spin coating method, while the counter electrode fabricated using evaporator method. Variations performed on P3HT layer with thickness variation is 1 layer, 3 layers, 5 layers and 7 layers. Characterization of optical properties in the visible conducted using UV-VIS spectrometer, while the electrical properties characterictics using the IV Meter El Kahfi in the dark and under irradiation. Characterization of organic solar cells was measured by using a Keithley 2602. Organic solar cell I-V characteristics measured tested under illumination with an intensity of 1000 Watt/m using xenon light in the area of 10 mm. Based on the results obtained organic solar cells with 7 layers of P3HT shows the I-V characteristics of the best results compared to other P3HT layer thickness. Keywords: organic solar cell, P3HT, klorofil, spin coating
Pengaruh Adsorben Terhadap Pembentukan Na2CO Berbasis CO23 Hasil Pembakaran Tempurung Kelapa Weny Eka Rosaline, Simon Sembiring, Wasinton Simanjuntak
Jurnal Teori dan Aplikasi Fisika Vol. 1 No. 2 (2013): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v1i2.52

Abstract

A research synthesis of sodium carbonate (Na2 CO) using NaOH solution of technical and combustion CO2 from burning coconut shell with adsorbent rice husk, activated carbon, zeolite. Na2CO3 precipitate obtained from a mixture of technical solution of NaOH and CO2 from burning coconut shells. Na2CO3 precipitated cleaned with 70% alcohol. Precipitate was filtered and vacuumed. Heating is then performed at a temperature of 110oC for 6 hours to remove moisture content. Once dried, crushed and weighed samples. Precipitated of adsorbent rice husk, activated carbon, zeolite respectively 24 grams, 17.5 grams, and 5.5 grams. The samples were characterized using FTIR and showed a group CO3 2- Groups CO3 2- in the sample of adsorbent rice husk is at number 1448.74 cm -1 and 866.06 cm -1. Group CO3 2- in the sample of adsorbent activated carbon is at 881.25 cm-1 numbers. Cluster CO3 2- in the sample of adsorbent zeolite is at number 866.35 cm -1. Keyword: Sodium Carbonate, Adsorbent, Carbondioxide, Coconut Shell.
Sifat Optik Kaca Tellurite yang Terdadah PbO Evi Nurliana; Kusnanto Mukti W; Ahmad Marzuki
Jurnal Teori dan Aplikasi Fisika Vol. 2 No. 2 (2014): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v2i2.53

Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh dadah PbO terhadap sifat optis kaca tellurite. Komposisi kaca yang digunakan yaitu 55TeO2-(43-x)ZnO-2Bi2O3-xPbO dengan variasi x = 0, 6, 7, 8, 9, 10.Fabrikasi kaca telluritetelah dilakukan dengan metode melt-quenching. Karakterisasi yang dilakukan yaitu pengukuran densitas, indeks bias, dan absorbsi kaca. Pengukuran densitas dilakukan dengan piknometer, indeks bias dengan metode sudut Brewster pada panjang gelombang 640 nm. Pengukuran spektrum absorbsi dilakukan menggunakan UV-Vis spektrofotometer pada panjang gelombang 200-800 nm dan FTIR spektrofotometer pada panjang gelombang 2500-6500 nm. Dari hasil penelitian diketahui bahwa penambahan PbO pada komposisi kaca mengakibatkan kenaikan indeks bias, densitas, serta kenaikan energi band gap optis pada kaca tellurite.
Sintesis dan Karakterisasi ZrO2-CuO Sebagai Fungsi Perbandingan Mol Windhini Anggraeni; Posman Manurung
Jurnal Teori dan Aplikasi Fisika Vol. 2 No. 2 (2014): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v2i2.54

Abstract

Sintesis dan Karakterisasi Biokeramik Hidroksiapatit Bahan Tulang Sapi pada Suhu 800-1100 Ketut Adi Puspa; Dwi Asmi
Jurnal Teori dan Aplikasi Fisika Vol. 2 No. 2 (2014): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v2i2.55

Abstract

Telah disintesis dan karakterisasi biokeramik hidroksiapatit dari bahan tulang sapi dengan metode pengabuan. Bubuk tulang sapi dikalsinasi dengan variasi suhu 800 , 900 , 1000 , dan 1100 . Untuk mengevaluasi HA yang terbentuk selama proses sintesis maka dilakukan karakterisasi beberapa parameter seperti sifat termal dengan DTA/TG, pengukuran gugus fungsi menggunakan FTIR, struktur kristal melalui XRD, dan analisis mikrostruktur dengan SEM. Analisis TG menunjukkan penurunan massa sebesar 32,765% dari massa total. Hasil pengukuran gugus fungsi dengan FTIR menunjukkan serapan pada bilangan gelombang (wave number) 1029, 602, dan 571 cm-1 yang merupakan gugus fosfat ( ); bilangan gelombang 1437 dan 1415 cm-1 yang merupakan gugus karbonat ( ); dan bilangan gelombang 3698 dan 3572 cm-1 yang merupakan gugus hidroksil (OH-). Berdasarkan hasil analisis uji SEM menunjukkan bahwa sintesis dengan metode pengabuan menghasilkan senyawa hidroksiapatit dengan tingkat kemurnian yang sangat baik dan membentuk butiran yang semakin baik serta pori-pori semakin kecil. Hasil XRD menunjukkan bahwa struktur kristal hidroksiapatit sudah terbentuk pada suhu 800 dan sempurna pada suhu 1100 . Hasil analisis XRD menunjukkan bahwa fasa yang terbentuk adalah hidroksiapatit.
Preparasi Alumina Dengan Metode Elektrokimia Sebagai Bahan Baku Pembuatan Zeolit Sintetik dan Karakterisasinya Dengan Transmission Electron Microscopy (TEM) Putri Hanifah Liani; Simon Sembiring; Wasinton Simanjuntak
Jurnal Teori dan Aplikasi Fisika Vol. 2 No. 2 (2014): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v2i2.56

Abstract

Pada penelitian ini, dilakukan preparasi alumina menggunakan metode elektrokimia dengan bahan baku batang alumunium dan aquades yang diasamkan hingga pH = 5, dengan HNO3 10% sebagai elektrolit. Proses elektrokimia dilakukan pada potensial 22 Volt selama 24 jam untuk mendapatkan alumina dalam jumlah yang cukup. Alumina selanjutnya disaring lalu dikeringkan dalam oven pada suhu 100 oC selama 6 jam. Alumina kering digerus hingga menjadi bubuk dan dikarakterisasi menggunakan Transmission Electron Microscopy (TEM) untuk mengetahui ukuran partikelnya. Hasil karakterisasi menunjukkan bahwa partikel alumina memiliki ukuran yang berbeda, dengan rentang dari 59 hingga 230 nm, dan ukuran rata-rata partikel sebesar 137 nm.

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