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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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Spektrofotometer UV-Vis Untuk Estimasi Ukuran Nanopartikel Perak J Junaidi
Jurnal Teori dan Aplikasi Fisika Vol. 5 No. 1 (2017): 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.v5i1.145

Abstract

Pengaruh Filler Terhadap Karakteristik Mekanik Dan Permeabilitas Uap Air Dari Edible Film Berbasis Low Methoxyl Pectin Rizka Aidila Fitriana; Rina Septiana; Yuli Darni
Jurnal Teori dan Aplikasi Fisika Vol. 5 No. 2 (2017): 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.v5i2.146

Abstract

Penelitian ini bertujuan untuk mensintesis dan karakterisasi edible film dengan bahan baku pektin metoksil rendah dari kulit kakao dengan sorbitol sebagai plasticizer. Pengaruh filler CaCO3 dengan variasi berat (0, 0,2, dan 0,4 gram) terhadap kekuatan tarik dan permeabilitas uap air (WVP) telah dievaluasi.. Isolasi pektin dari kulit kakao dilakukan dengan ekstraksi menggunakan ammonium oksalat pada suhu 85oC, pH 3,6 selama 60 menit. Edible film disintesis pada suhu 85oC dengan waktu pengadukan 50 menit. Bahan baku pektin yang digunakan berukuran 200 mesh dengan variasi konsentrasi plasticizer sorbitol (1,2, dan 3% volume). Edible film yang dihasilkan dikeringkan pada suhu 55oC selama 6 jam. Hasil penelitian diperoleh produk edible film dengan karakteristik nilai kuat tarik 6,511 MPa, persen pemanjangan 2,419%, modulus young 269,119 MPa, dan WVP 5,583 g/m2.day pada konsentrasi CaCO3 0,4 gram dan sorbitol 1%. Pengaruh penambahan filler mampu meningkatkan nilai kuat tarik dan permeabilitas uap air lebih tinggi dibandingkan tanpa filler.
Pengaruh Temperatur Austenisasi terhadap Struktur Mikro dan Nilai Kekerasan Material 14%Cr-3%Ni-2%Mo-2%C untuk Aplikasi Bola Gerus Imaniar Romaeni; Posman Manurung; Fajar Nurjaman
Jurnal Teori dan Aplikasi Fisika Vol. 5 No. 2 (2017): 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.v5i2.147

Abstract

Efektivitas Ekstrak Daun Gambir Sebagai Inhibitor Pada Baja Karbon API 5L dengan Perlakuan Panas Menggunakan Larutan NaCl 3% Ilwan Pusaka; Ediman Ginting Suka; Yanti Yulianti
Jurnal Teori dan Aplikasi Fisika Vol. 5 No. 2 (2017): 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.v5i2.148

Abstract

Abstract.The effectiveness of uncaria gambir leaves extract as inhibitor on carbon steel API 5L with heat treatment in NaCl 3% had been researched. The research was done by weight loss. Corrosion rate had been tested on carbon steel API 5L with heat treatment and carbon steel without heat treatment in NaCl 3% added by soursop leaves extract inhibitor for 168 hours with concentrations of 0%, 2%, 4%, and 6%. The result showed at carbon steel API 5L with and without heat treatment corrosion rate higher at concentration inhibitor 0% that is 0,051 mm/y. While corrosion rate lower at concentration inhibitor 2% that is 0,03%. Until, Efficiency higher at carbon steel API 5L with and without heat treatment in concentration inhibitor 2% that is 61,63% and 66,43%. The X-Ray Diffraction (XRD) characterization result showed at carbon steel API 5L with heat treatment that the phase formed is martensite. At carbon steel API 5L with heat treatment that the phase formed is pure Fe. Scanning Electron Microscopy (SEM) characterization at carbon steel API 5L with heat treatment showed even clusters and larger size, holes, cracks and grain boundary in the surface. At carbon steel API 5L without heat treatment showed uneven clusters and smaller size, holes, cracks, but grain boundary not showed in the surface. Energy Dispersive Spectroscopy (EDS) characterization on sample with inhibitor 0% obtained Cl element and Oxygen larger than inhibitor 2%. Key words:Carbon steel API 5L, soursop leaves extract, corrosion inhibitor, NaCl and heat treatment
Rancang Bangun Generator Sebagai Sumber Energi Listrik Nanohidro Abdan Sakura; Amir Supriyanto; Arif Surtono
Jurnal Teori dan Aplikasi Fisika Vol. 5 No. 2 (2017): 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.v5i2.149

Abstract

Generator design has been realized as a source of electricity energy nanohidro using 6 pairs of poles of permanent magnets and copper coils to 6 pairs of windings tool created to generate power nanohidro dam waterfall flows to the load 210 watt. Batu Putu designed tool able to work constantly for rotating turbines. Design to manufacture rotor and stator circuits mounted on prime mover induction motor. The test results showed that the greater the speed of the voltage and current produced water increases. Testing is done with a multimeter instrument and tachometer first appliance testing done in 1 day 5 hours produces the light on the data obtained average voltage - current average of 128,92V and was unchanged at 1.69 A.
Aplikasi IoT Sistem Monitoring Kualitas Air Tambak Udang Menggunakan Aplikasi Blynk Berbasis Arduino Uno Gurum Ahmad Pauzi; Mutiara Amalia Syafira; Arif Surtono; Amir Supriyanto
Jurnal Teori dan Aplikasi Fisika Vol. 5 No. 2 (2017): 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.v5i2.150

Abstract

The IoT Application in the Shrimp Pond Water Quality Monitoring System has been realized using Arduino Uno Application. This research was conducted to determine of the quality of shrimp pond water using an android smartphone. Sensor input (Temperature, pH and Dissolved Oxygen (DO)) from the sensor readings are processed on Arduino then sent to an android smartphone using ESP8266-01 and measurement result will be displayed on the Blynk Application. The Blynk application will receive water quality data to be displayed in the form of real values or chart. The result obtained that, the system can measure the quality of shrimp pond water using temperature sensor, pH sensor, and DO sensor based on Arduino Uno and control sensors when measuring received data displayed on Blynk application.
Pengaruh Aditif Ferro Boron (FeB) terhadap Karakteristik Serbuk Hematit (?-Fe2O3) Suci Pangestuti; Pulung Karo Karo; Parmadean Subayang; Candra Kurniawan
Jurnal Teori dan Aplikasi Fisika Vol. 5 No. 2 (2017): 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.v5i2.151

Abstract

Sistem Otomasi Kincir Air Untuk Respirasi Udang Tambak Menggunakan Sensor Dissolved Oxygen (DO) Ari Fiyanti; Warsito Warsito; Sri Wahyu Suciyati
Jurnal Teori dan Aplikasi Fisika Vol. 5 No. 2 (2017): 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.v5i2.152

Abstract

Automation system waterwheel for farmed shrimp respiration have realized using dissolved oxygen sensors (DO). The DO sensor used to detect the levels of dissolved oxygen in the water. Digital data output sensor DO is connected to the computer via the arduino uno, furthermore the output data are recorded and displayed on the LCD monitor and a television series. Automation system using relay with a range of dissolved oxygen levels <4,00 mg/L for the condition of the windmills ON and >5,50 mg/L for the condition of the windmills OFF.
Efektivitas Ekstrak Daun Belimbing Wuluh (Averrhoa Bilimbi L.) Sebagai Inhibitor Pada Baja St37 Dalam Medium Korosif NaCl 3% Nia Aprilliani; Ediman Ginting Suka; Suprihatin Suprihatin
Jurnal Teori dan Aplikasi Fisika Vol. 5 No. 2 (2017): 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.v5i2.153

Abstract

The effectiveness of starfruitleaves extract as an inhibitor of St37 carbon steel in a corrosive medium of 3% NaCl had been researched. The concentration of starfruit leaves extract inhibitor was used 0%. 3%. 5% and 7% with immersion time of 4 and 8 days. Corrosion rate testing was done by weight loss method. The results of the research at each immersion time, showed that the optimum concentration of leaves starfruit extract to inhibit corrosion is 5% and the longer time immersion resulted in decreasing corrosion rate on St37 carbon steel. The maximum effectiveness of inhibitor occurred at 5% concentration with 8 days immersion time which is 78.57%. Characterization using Scanning Electron Microscopy (SEM) showed that the surface of steel looks smoother with white on sampleSt37-8-5 and St37-4-5 showing that tannin in starfruit leaves extract has been adsorbed on the steel surface while St37 carbon steel on St37-8-0 and St37-4-5 has a black steel surface with holes and cracks. Characterization using Energy Dispersive Spectroscopy (EDS) obtained oxygen element on sample St37-8-0 St37-4-0 greater concentration and Fe element smaller on sample St37-8-5 and St37-4-5.
Rancang Bangun Alat Ukur Curah Hujan Dengan Metode Timbangan Menggunakan Sensor Fototransistor Berbasis Arduino Uno Maria Sova; Warsito Warsito; Amir Supriyanto
Jurnal Teori dan Aplikasi Fisika Vol. 5 No. 2 (2017): 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.v5i2.154

Abstract

Page 14 of 40 | Total Record : 395

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