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JOURNAL ONLINE OF PHYSICS
Published by Universitas Jambi
ISSN : -     EISSN : 25022016     DOI : -
Core Subject : Science,
Physics
Jurnal Online of Physics muncul sebagai wadah publikasi ilmiah dibidang fisika murni dan fisika terapan. Jurnal ini terbit secara online dua kali setahun yaitu pada bulan Juni dan Desember. Jurnal ini di terbitkan oleh program Studi Fisika Fakultas Sains dan Teknologi Universitas Jambi.
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Articles 271 Documents
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APPLICATION OF PIT HEAT METHOD IN SANGGAI MACHINE TECHNOLOGY AS A ORGANIC PRESERVATIVE OF FOOD Dede Martino; Ardiyaningsih Puji Lestari; Linda Handayani
JOURNAL ONLINE OF PHYSICS Vol. 5 No. 1 (2019): JOP (Journal Online of Physics) Vol 5 No 1
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v5i1.8268

Abstract

Indonesia is a country that has extraordinary natural resources, both biological and non-biological natural resources. Indonesia has a great opportunity in utilizing natural resources to improve the welfare of the people. Unfortunately, Indonesia has not been yet able to exploit all of that. The prices of agricultural products are quite high but ironically the welfare of farmers has not improved either. On the other hand, other natural resources from the marine and earth sector also have export potential, but in fact these potentials have not had a significant influence. One of the causes of the suboptimal use of natural resources in Indonesia is the lack of integration of technology in developing the potential of the biodiversity. One of the efforts made to optimize the potential for life is to apply the concept of physics, which uses the concept of pit heat in the “sanggai” engine technology. This machine can be used to optimize the potential of agriculture in Indonesia. Pit heat technology can dry food without damaging the vitamin content. This technology does not damage the protein structure of food substances so that the application of technology on this machine can be used to optimize the potential of agriculture in Indonesia.
SYNTHESIS, CHARACTERIZATION, AND APPLICATION OF Fe3O4 NANOPARTICLES AS A SIGNAL AMPLIFIER ELEMENT IN SURFACE PLASMON RESONANCE BIOSENSING I Putu Tedy Indrayana
JOURNAL ONLINE OF PHYSICS Vol. 5 No. 2 (2020): JOP (Journal Online of Physics) Vol 5 No 2
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v5i2.8259

Abstract

The Fe3O4 nanoparticle has potential applications to be active materials for biosensor. This research was aimed at synthesizing and applying Fe3O4 nanoparticles for signal amplification of Surface Plasmon Resonance (SPR)-based biosensor. The synthesis was carried out by using the coprecipitation method at a temperature of 80oC for 60 minutes. NaOH of 5 molars was used as a precipitating agent. The Fe3O4 nanoparticles were characterized for their microstructure by using X-Ray Diffraction (XRD) and Transmission Electron Microscopy (TEM) techniques. The crystallinity of nanoparticles is 87% and the crystallite size is 15.70 nm. The shape of Fe3O4 is nearly spherical. The optical properties were characterized by using Fourier Transform Infrared Spectroscopy (FTIR) and Specular Reflection UV-Vis Spectroscopy (SR UV-Vis). There were vibrations of Fe3+-O and Fe2+-O bonds at characteristic frequencies of 586.86 cm-1 and 422.64 cm-1. The direct and indirect optical gap energies were 3.43 eV and 3.10 eV. The magnetic properties measured by Vibrating Sample Magnetometer (VSM) confirmed that Fe3O4 was ferrimagnetic. The Fe3O4 was successful to be applied as a signal amplifier for SPR-based biosensors due to their optical and magnetic properties. The SPR angle shifted to a higher value and the change was 3.57o.
PRINSIP KETIDAKPASTIAN HEISENBERG DALAM TINJAUAN KEMAJUAN PENGUKURAN KUANTUM DI ABAD 21 Jesi Pebralia
JOURNAL ONLINE OF PHYSICS Vol. 5 No. 2 (2020): JOP (Journal Online of Physics) Vol 5 No 2
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v5i2.9049

Abstract

The Heisenberg uncertainty principle is the basic foundation of quantum physics that characterizes quantum physics with classical physics. The Heisenberg uncertainty principle provides boundaries where there are no absolute measurement results in any quantum measurement. Along with the development of increasingly sophisticated measurement instruments in the 21st century, presents the opportunity for the emergence of modifications from the Heisenberg uncertainty principle from the general form of existing formulations. This study aims to provide an overview of the opportunities for Heisenberg uncertainty formulation and provide a description of the stages of the Heisenberg uncertainty formulation's uncertainty formulations that have been reviewed by previous researchers. The research method used is the method of literature study that aims to find out the background and theories of the development of Heisenberg's uncertainty principle and to explain the formulation directly which aims to determine the technical sequence of modifications to the existing formulation. Through this research, the authors managed to get an opportunity for the emergence of new modifications to the Heisenberg uncertainty principle formulation.
ANALISIS KONDUKTIVITAS PANAS PADA MATERIAL ALTERNATIF SEBAGAI INSULASI DINDING RUANG AKOMODASI KAPAL BERBASIS LIMBAH AMPAS TEBU DAN SERBUK KAYU Aurista Miftahatul Ilmah Aurista
JOURNAL ONLINE OF PHYSICS Vol. 5 No. 2 (2020): JOP (Journal Online of Physics) Vol 5 No 2
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v5i2.9389

Abstract

The accommodation room on the ship is used as a resting place for the crew and as a storage place for goods on the ship so insulation is needed in each room to withstand the heat propagation on the ship. One type of insulation material on a ship is mineral wool which is made from polyurethane. Polyurethane is a plastic foam that is a mixture of polyol and isocynate and one of the ingredients is polymer which can be obtained from natural materials that contain lots of cellulose such as bagasse and sawdust. the addition of sawdust and bagasse that can be done is 40% of the total volume of the mixture. Then it is carried out to get the thermal conductivity value of each mixture of sawdust, bagasse, and polyurethane with various dosing ratios on the sawdust, to further calculate the cooling load. The test results show the best conductivity value is the mixing of wood powder 0.2 gr which is 2.65 w / mk which can withstand the rate of heat up to 311.59 KW.
ANALISIS TINGKAT KEBISINGAN DI LOKASI INDUSTRI RUMAH TANGGA PEMBUATAN TAHU DAN TEMPE KABUPATEN OGAN KOMERING ILIR Atina; Indah Safitri
JOURNAL ONLINE OF PHYSICS Vol. 5 No. 2 (2020): JOP (Journal Online of Physics) Vol 5 No 2
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v5i2.9393

Abstract

Kebisingan merupakan hal yang umum terjadi di lingkungan termasuk area industri. Melalui peraturan kementrian lingkungan hidup, pemerintah menetapkan Nilai Ambang Batas (NAB) kebisingan untuk tiap-tiap area. Penelitian ini bertujuan menganalisis nilai tingkat kebisingan di area industri tahu dan tempe Jalan Cokro Kota Kayu Agung, Ogan Komering Ilir. Metode yang diterapkan dalam penelitian ini adalah dengan pengukuran langsung di lapangan menggunakan Sound Level Meter. Pengukuran dilakukan pada satu titik yang sama selama 3 hari masing-masing pada waktu sibuk yaitu pagi, siang dan sore hari. Hasil pengukuran menunjukkan bahwa tingkat kebisingan di area ini pada pagi hari berada pada rentang 68,89 dB(A), 71,87 dB(A) dan 62,26 dB(A). Tingkat kebisingan pada siang hari yaitu 65,03 dB(A), 71,17 dB(A) dan 73,87 dB(A). Sedangkan tingkat kebisingan pada sore hari yaitu 67,19 dB(A), 59,44 dB(A) dan 68,09 dB(A). Perbedaan nilai ini disebabkan karena lokasi perindustrian ini berada di tepi jalan sehingga tingkat kebisingan selain disebabkan karena suara mesin produksi juga dipengaruhi oleh kendaraan yang lalu lalang. Dari penelitian dapat disimpulkan bahwa tingkat kebisingannya berada dibawah NAB yang ditetapkan pemerintah.
RANCANG BANGUN TRAINER KIT HTNSJR2018A SEBAGAI INOVASI ALAT BERBASIS LABORATORIUM Frastica Deswardani; Helga Dwi Fahyuan; Nurhidayah; M. Ficky Afrianto; Nelson; Nazarudin
JOURNAL ONLINE OF PHYSICS Vol. 5 No. 2 (2020): JOP (Journal Online of Physics) Vol 5 No 2
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v5i2.9396

Abstract

Telah dilakukan pengembangan media pendidikan berupa peralatan laboratorium berupa Trainer Kit HTNSJR2018A. Pada trainer kit ini terdapat sistem sensor gas SO2 dengan menggunakan sensor MQ136. Untuk sensor akustik, jenis sensor yang digunakan adalah sensor microphone. Sementara, sensor suhu dan kelembaban akan menggunakan sensor DHT22. Hasil yang diperoleh dari pengujian yang telah dilakukan adalah pada sensor suhu dan kelembaban dimana modul penunjang telah bekerja dengan baik untuk mencatat waktu dan menampilkan data dalam format DD/MM/YYYY dan HH:MM:SS. Sensor suhu dan kelembaban telah bekerja dengan baik ditunjukkan dengan adanya perubahan respon saat sensor dipaparkan pengaruh berupa hembusan nafas, udara dari hairdyer dan aliran panas dari korek api. Sedangkan untuk sensor gas MQ136 juga telah bekerja dengan baik ditunjukkan dengan adanya perubahan respon berupa tegangan dan rasio resistansi dari sensor saat dipaparkan gas SO2 yang dihasilkan dari belerang. Kemudian, untuk sensor akustik/microphone juga telah dapat bekerja dengan baik ditunjukkan dari perubahan tegangan saat diberi nada dengan volume rendah dan volume tinggi
ANALISIS GUGUS FUNGSI PADA TiO2/BIOCHAR DENGAN SPEKTROSKOPI FTIR (FOURIER TRANSFORM INFRARED) Frastica Deswardani; Nelson; Nurhidayah; Helga Dwi; M. Ficky Afrianto
JOURNAL ONLINE OF PHYSICS Vol. 5 No. 2 (2020): JOP (Journal Online of Physics) Vol 5 No 2
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v5i2.9397

Abstract

Pembuatan TiO2 didoping dengan biochar telah dilakukan, variasi doping yang diberikan adalah sebesar 0%, 1%, 2%, 3% dan 4%. Sampel TiO2/biochar kemudian dikarakterisasi dengan FTIR untuk dapat dianalisis gugus fungsi seluruh sampel. Berdasarkan spektrum FTIR yang diperoleh bahwa pada seluruh sampel muncul gugus fungsi khas TiO2 yaitu Ti-O pada puncak serapan sekitar 700 – 950 cm-1. Ikatan vibrasi O-H stretching dan O-H bending muncul pada seluruh sampel menunjukkan adanya molekul air. Selain itu ikatan vibrasi O-C-O dan C-H muncul menunjukkan adanya penggunaan bahan organik polimer PVA pada proses sintesis. Setelah proses doping dilakukan, muncul gugus fungsi C≡C pada sampel doping 1%, 2%, 3% dan 4% yang menunjukkan adanya ikatan karbon yang berasal dari biochar. Pada sampel 4% biochar muncul ikatan vibrasi Ti-O-C yang menunjukkan adanya interaksi antara TiO2 dengan karbon dari biochar.
EFEK SERETAN KERANGKA INERSIAL DI DALAM MEDAN BINTANG NEUTRON YANG BEROTASI DAN STASIONER Tika Restianingsih; Muhammad Farchani Rosyid
JOURNAL ONLINE OF PHYSICS Vol. 5 No. 2 (2020): JOP (Journal Online of Physics) Vol 5 No 2
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v5i2.9401

Abstract

The inertial frame dragging effect of rotating neutron star has been studied. Inertial frame dragging effect, also well known as Lense Thirring effect, has been predicted using general theory of relativity in 1918. When the neutron star rotates very quickly, the space time around it will be dragged to the direction of the rotation. The Lense Thirring effect is small enough for small objects so it will be clearly seen for massive objects like compact stars, especially neutron star. Later, we derive the equation of frame dragging rate () inside the rotating neutron star, which is axisymmetrik and stationary. Frame dragging rate is decreasing from the center to the surface of stars. It is also noted that is proportional to the angular velocity of star.
PENGARUH MILLING TERHADAP KARAKTERISTIK MOLECULARLY IMPRINTED POLYMER KARBARIL (C12H11NO2) Suci Aprilia
JOURNAL ONLINE OF PHYSICS Vol. 5 No. 2 (2020): JOP (Journal Online of Physics) Vol 5 No 2
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v5i2.9430

Abstract

Molecularly Imprinted Polymer (MIP) has been synthesized with carbaryl used as a template and forms complex bonds with Methacrylic Acid (MAA)through hydrogen bonds, followed by a cross-linking process using Ethylene Glycol Dimethacrylate (EGDMA) cross-linkers. The polymerization process begins with the thermal decomposition of Benzoyl Peroxide (BPO) as an initiator. Non-Imprinted Polymer (NIP) as a control polymer has also been synthesized using a similar procedure without using carbaryl templates. In this study, two variations of carbaryl are used, which are not milled carbamates, and carbaryl has been milled using High Energy Milling (HEM). The FTIR study was carried out to investigate the presence of carbaryl in polymers, MIP, and NIP. The spectrum shows that the concentration of carbaryl compound decreases after the extraction process. This result was also confirmed by the increase in the value of the percentage of transmittance in the MIP, especially the nano carbaryl MIP. This result is supported by the X-RD results, which showed a decrease in the size of the crystals in the carbaryl MIP from 10.07 Å while the nano carbaryl MIP was 9.16 Å.
NOISE CHARACTERISTICS OF SEA WAVES BASED ON ITS HEIGHT, PERIOD AND BREAKING WAVES Amron
JOURNAL ONLINE OF PHYSICS Vol. 5 No. 2 (2020): JOP (Journal Online of Physics) Vol 5 No 2
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v5i2.9509

Abstract

ABSTRACT Wave sound is one of the sources of ambient noise in the waters which causes the role of sound as a transmission medium of information and communication becomes disrupted. The characteristics of wave noise can be influenced by their parameters, such as height and period of the waves and breaking waves. The study aimed to determine the characteristics of noise (intensity, frequency, pulse duration and interval duration) of waves based on its height, periods and breaking waves. Data acquisition for sound wave is obtained by hydrophones, visual of wave from CCTV cameras, and wave parameters is determined from ADCP data. Sound characteristics based its height, period and breaking waves were analyzed by Kruskal-Wallis analysis. The intensity of noise is affected by all wave parameters, while the pulse duration is significantly influenced by the changes in height and wave period, and the breaking waves velocity. Frequency of noise is only impacted by the breaking wave height. Other noise characteristics, the interval duration is not significantly influenced by all wave parameters.

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