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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.
Arjuna Subject : -
Articles 271 Documents
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SEBARAN LINDI DI SEKITAR TPA BATU LAYANG PONTIANAK BERDASARKAN NILAI SELF-POTENTIAL Adriati Adriati; Muhardi Muhardi; Yuris Sutanto; Yoga Satria Putra; Radhitya Perdhana
JOURNAL ONLINE OF PHYSICS Vol. 8 No. 3 (2023): JOP (Journal Online of Physics) Vol 8 No 3
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v8i3.27087

Abstract

Sebaran lindi dapat menyebabkan pencemaran pada air tanah di sekitar Tempat Pembuangan Akhir (TPA). Penelitian ini bertujuan untuk memetakan sebaran lindi di sekitar TPA Batu Layang. Identifikasi sebaran lindi dilakukan berdasarkan sebaran nilai self-potential di permukaan. Pengukuran dilakukan menggunakan metode self potential (SP) dengan konfigurasi fixed base. Konfigurasi ini menggunakan 2 buah elektroda, 1 buah elektroda berada di titik referensi (base) dan elektroda lainnya berpindah-pindah di sepanjang lintasan (rover) untuk mengukur nilai self-potensial di titik pengukuran. Pengukuran di lapangan mengaplikasikan 4 lintasan dengan panjang masing-masing 110 m, jarak antar lintasan sebesar 5 m, dan jarak elektroda (porous pot) sebesar 5 m. Hasil penelitian menunjukkan bahwa nilai self-potential yang diperoleh sebesar 7,62 mV hingga -12,38 mV. Akumulasi aliran lindi diinterpretasi memiliki nilai self-potensial yang relatif lebih rendah dengan nilai anomali -8 mV hingga -14 mV. Nilai potensial tinggi terdapat di bagian selatan, sedangkan nilai potensial rendah terdapat di bagian utara lokasi penelitian. Dengan demikian, aliran lindi diduga terakumulasi pada arah barat yang berdekatan dengan tumpukan sampah TPA Batu Layang.
PEMODELAN SUMBER TEKANAN GUNUNG SINABUNG MENGGUNAKAN SKEMA INVERSI PARTICLE SWARM OPTIMIZATION (PSO) Ratih Kumalasari; Wahyu Srigutomo; Irwan Meilano; Hendra Gunawan
JOURNAL ONLINE OF PHYSICS Vol. 8 No. 3 (2023): JOP (Journal Online of Physics) Vol 8 No 3
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v8i3.27099

Abstract

Gunung Sinabung merupakan salah satu gunung aktif diindonesia yang masuk dalam gunungapi tipe A setelah erupsi pertama kali pada tahun 2010 setelah sebelumnya tidak ada aktivitas erupsi. Gunung sinabung terus erupsi hingga saat ini yang mejadikan Gunung Sinabung perlu diamati lebih lanjut terkait aktivitas yang terjadi serta dilakukan pemodelan untuk memprediksi kondisi bawah permukaan yang dapat membantu proses analisis. Pemodelan terhadap data permukaan Gunung Sinabung yang berasal dari data pergeseran permukaan dari GPS pada tahun 2015-2016 telah dimodelkan dengan skema inversi particle swarn optimization (PSO). Erupsi yang terus menerus pada tahun tersbut menghasilkan data yang sangat fluktuatif dengan hasil inversi menunjukan bahwa sumber tekanan pada tekanan pada Gunung Sinabung terletak pada kedalaman dangkal yaitu 0,5km hingga 1,0 km dibawah permukaan laut dibawah Gunung Sinabung, dengan sumber tekanan yang dangkal serta adanya inflasi pada tubuh gunung api maka memungkinkan adanya erupsi secara kontiyu dalam waktu yang singkat
PENERAPAN METODE RESISTIVITAS KONFIGURASI SCHLUMBERGER UNTUK MENDETEKSI PERSEBARAN AIR LINDI (STUDI KASUS TPA TERJUN MARELAN) Afniar Harahap; Ratni Sirait; Lailatul Husna Lubis
JOURNAL ONLINE OF PHYSICS Vol. 9 No. 1 (2023): JOP (Journal Online of Physics) Vol 9 No 1
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v9i1.27281

Abstract

Leachate has the potential to be used as organic fertilizer because it contains high levels of minerals and organic matter. In the leachate there are several compounds, namely heavy metal compounds, salts, nitrogen compounds and various types of other organic matter. Leachate leachate also contains very fine suspended matter from the decomposition of microbes, usually consisting of Ca, Mg, Na, K, Fe, Chloride, Sulfate, Phosphate, Zn, Ni, CO2, H2O, N2, NH3, H2S, Organic acids , and H2. This study aims to find out how the subsurface layer in the Medan Marelan Falls Landfill area, the distribution of leachate in the Medan Marelan Falls Landfill. 1D resistivity measurements were only carried out in the Medan Marelan Falls TPA area. The geophysical method used in this study is the Schlumberger configuration. This research was conducted at three points along the 200 meter track. on line I is at a depth of 6.92 m with a resistivity value of 3.16 Ωm with a North to South flow direction. On track II it is at a depth of 1.15 m, 4.53 m, and 22.1 m with a resistivity value of 1.5 Ωm, 2.25 Ωm, and 5.05 Ωm respectively with the North to West flow direction. On track III it is at a depth of 1.19 m, 20.8 m, and 53.9 m with resistivity values of 1.54 Ωm, 3.51 Ωm, and 1.13 Ωm respectively with North to West flow direction. The distribution of leachate at the Medan Marelan Falls TPA which dominates is on track III marked with black to bluish color images.
ANALISIS DOSIS PAPARAN RADIASI DARI PESAWAT PANORAMIK DI INSTALASI RADIOLOGI RUMAH SAKIT UMUM DAERAH RADEN MATTAHER JAMBI Chintiya Romarti; Jesi Pebralia; Rista Mutia Anggraini
JOURNAL ONLINE OF PHYSICS Vol. 9 No. 1 (2023): JOP (Journal Online of Physics) Vol 9 No 1
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v9i1.27310

Abstract

This research aims to analyze the influence of distance and direction on radiation exposure values, assess the doses received by radiation workers and the general public, and evaluate the effectiveness of radiation protection from panoramic aircraft. The research method used is an experimental research method, where the researcher directly measures the variables of the study and conducts data analysis. The study was conducted by measuring radiation doses in various directions at distances ranging from 0.5 meters to 2.5 meters forward and to the right, and 0.5 meters to 1.5 meters to the left. Dose data reception was taken at operator room, service area, corridor, and waiting room points, and radiation protection effectiveness measurements were taken at corridor entrance, waiting room, and operator room points using a survey meter. The research results indicate that the radiation exposure dose is inversely proportional to the measured distance. The dose received by radiographers in the operator room is 0.107 μSv/hour, in the employee corridor, it is 0.0856 μSv/hour, and in the public waiting room, it is 0.0856 μSv/hour. The radiation protection effectiveness value in the operator room is 94.40%, at the patient entrance from the panoramic aircraft waiting room, it is 92.12%, and at the radiographer entrance from the employee corridor, it is 94.62%. According to the Tenth Value Thickness (TVT) concept, this is considered safe because the existing protection capabilities can effectively absorb radiation.
STUDI PENDAHULUAN POTENSI LIKUEFAKSI MENGGUNAKAN PENDEKATAN GEOLOGI, HIDROGEOLOGI, DAN DATA VS30 PADA KECAMATAN KALIANDA, LAMPUNG SELATAN Restu Wildanu Ahadi; Sultan Al Ghifari; Kevin Bahy Taufiquds; M. Farhan Al Rasyid; M. Aditya Makki; Rahmi Mulyasari
JOURNAL ONLINE OF PHYSICS Vol. 8 No. 3 (2023): JOP (Journal Online of Physics) Vol 8 No 3
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v8i3.27351

Abstract

Likuefaksi merupakan kejadian setelah gempa yang menyebabkan hilangnya kekuatan tanah yang disebabkan tegangan air pori yang timbul akibat beban siklis. Tujuan penelitian ini adalah untuk melakukan studi pendahuluan dan memetakan daerah yang berpotensi terjadi likuefaksi di daerah Kalianda, Lampung. Metode yang digunakan pada penelitian ini didasarkan pada kajian geologi, hidrogeologi dan data Vs30. Litologi pada daerah penelitian merupakan formasi aluvium : bongkah, kerikil, pasir, lanau, lumpur, dan lempung (Qa), dan Endapan gunung api muda : Lava (andesit-basal), breksi, dan tuf (Qhvr), secara umum berupa batuan sedimen urai dan bersifat non-kohesif dengan kondisi air tanah yang cukup jenuh dengan kedalaman rata 2 - 10 meter. Berdasarkan stuktur geologi terdapat sesar aktif dan zona subduksi yang berpotensi menimbulkan gempa bumi. Hasil data Vs30 menunjukkan daerah penelitian memiliki dua klasifikasi tanah, yakni tanah sedang (175 < vs ≤ 350) pada bagian utara dan tanah keras batuan lunak (350 < vs ≤ 750) pada bagian selatan.
ANALISIS FUNGSI KORELASI KLASIK DAN KUANTUM UNTUK MODEL CINCIN: SEBUAH REVIEW Ayu Ningsih P. A. Sunaryo; Herry F. Lalus; Hartoyo Yudhawardana
JOURNAL ONLINE OF PHYSICS Vol. 9 No. 1 (2023): JOP (Journal Online of Physics) Vol 9 No 1
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v9i1.27501

Abstract

A review of the journal entitled 'Classical And Quantum Correlation Functions For A Ring Model' has been carried out which discusses the solutions of classical and quantum correlation functions for the ring model. Classical and quantum correlation functions are derived for systems of non-interacting particles moving in a circle. demonstrated that the decay behavior of the classical expression for the correlation function can be recovered from a strictly periodic quantum mechanical expression by taking the limit ℏ→0, after the appropriate transformation. The aim of this study is to present clearly and in detail how the position correlation function for a system of particles moving in a circle having a certain average energy and written in a form which shows the nature of the transformation. Next, we examine the use of Poisson addition to represent F(z), and how the correlation function becomes identical to the form given by classical statistical mechanics, which exhibits Gaussian decay. The results of this study indicate that the positional correlation function for a system of particles moving in a circle, and having a certain average energy, can be written in a form which shows the nature of the transformation. Then using the Poisson addition formula to represent F(z), the expression is rewritten to enable the limit ℏ→0 to be taken. It was finally found that the correlation function became identical to the form given by classical statistical mechanics, which exhibits a Gaussian decay.
DETEKSI KADAR ETANOL PADA MAKANAN TRADISIONAL LEMANG TAPAI MENGGUNAKAN MIKROBIAL BIOSENSOR Nadratul Hanifah; Rahmondia Nanda Setiadi; Yanuar Yanuar; Vira Annisa Rosandi; Lazuardi Umar
JOURNAL ONLINE OF PHYSICS Vol. 8 No. 3 (2023): JOP (Journal Online of Physics) Vol 8 No 3
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v8i3.27517

Abstract

Konsumsi etanol memiliki konsekuensi bagi kesehatan, dimana penentuan etanol sangat relevan dengan uji toksikologi klinis yang mempengaruhi sistem saraf, sistem peredaran darah, sistem pencernaan sehingga perlu dideteksi. Biosensor amperometris merupakan alternatif untuk deteksi etanol dalam makanan yang diamati melalui nilai tegangan output, diperoleh dari oksigen terlarut yang tertinggal dari hasil metabolisme sel. Pada penelitian ini dilakukan deteksi etanol secara kuantitatif memanfaatkan biosensor berbasis sel ragi Saccharomyces cerevisiae untuk mengetahui kadar etanol yang terdapat pada makanan tradisional Lemang Tapai dengan nilai <5%. Larutan etanol standar dengan konsentrasi 1.2%, 2.43%, 3.64% dan 4.86% v/v sebagai kalibrasi sensor yang menunjukkan korelasi (r) yang baik yaitu 0.9937. Hasil pengukuran Lemang Tapai yang dideteksi oleh biosensor menunjukkan konsentrasi etanol 2.79%. Pengolahan data konsentrasi yang dihasilkan kemudian diuji menggunakan metode statistik Analysis of Variance (ANOVA) untuk mengetahui signifikansi perbedaan data yang dihasilkan untuk tiap konsentrasi etanol yang diuji. Hasil penelitian ini diharapkan dapat meningkatkan kesadaran dan kewaspadaan masyarakat terhadap adanya etanol dalam makanan tradisional yang berbahaya ketika dikosumsi secara berlebih.
ANALISIS UJI TARIK KOMPOSIT SERAT BATANG KELAKAI DENGAN VARIASI KATALIS UNTUK PEMBUATAN MATERIAL BUMPER MOBIL Rusly, Muhammad; Sulistyowati, Rita; Lumban Toruan, Parmin
JOURNAL ONLINE OF PHYSICS Vol. 9 No. 1 (2023): JOP (Journal Online of Physics) Vol 9 No 1
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v9i1.27670

Abstract

A research was conducted to create car bumper materials using natural kelakai plant fibers combined with a catalyst and resin as a binding agent in the composite. The main goal of the study was to examine the tensile strength of the kelakai fiber composite with different catalyst variations and assess the impact of these catalyst changes on the bumper material's tensile strength. The composite materials were prepared in three test specimens with catalyst compositions of 2,5%, 5%, and 7,5%, respectively, based on a 20 mL resin composition. These samples underwent tensile testing using a Universal Testing Machine (UTM). The results revealed that the tensile strength of the kelakai fiber composite increased with higher catalyst percentages. At 2,5%, 5%, and 7,5% catalyst compositions, the tensile strengths were measured as 0,37 N/mm2, 0,41 N/mm2, and 0,47 N/mm2, respectively. Additionally, the elongation values for the catalyst portion are 1,11%, 2,22%, and 3,89% and the Young's modulus values are 0,33 N/mm2, 0,18 N/mm2, and 0,12 N/mm2, respectively. The study demonstrates the significant influence of catalyst variations on the tensile strength of the kelakai fiber composite.
PENGGUNAAN BIJI KELOR (Moringa oleifera L.) DAN BIJI ASAM JAWA (Tamarindus indica L.) PADA PENJERNIHAN AIR SUMUR BOR MELALUI PROSES KOAGULASI DAN FLOKULASI DENGAN METODE SENTRIFUGASI Annisa Aulia Pratiwi; Masthura Masthura; Miftahul Husnah
JOURNAL ONLINE OF PHYSICS Vol. 9 No. 1 (2023): JOP (Journal Online of Physics) Vol 9 No 1
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v9i1.27728

Abstract

Drilled well water at the Ar-Rahmat Mosque in Manunggal Village, Labuhan Deli District, Regency Deli Serdang, North Sumatra Province, has a color that tends to be yellow and cloudy. From the test results, it was found that the turbidity level in the drilled well water reached 35.3 NTU and the iron (Fe) content reached 1.679 mg/L. This shows that the borehole water does not meet clean water standards according to PERMENKES RI No.32 of 2017, namely with a maximum turbidity level of 25 NTU and a maximum iron (Fe) content of 1.0 mg/L. There is one way to purify borehole water by using moringa seeds and tamarind seeds in the coagulation and flocculation processes through the centrifugation method. This study aims to determine the most optimal seed composition in purifying well water. The mass variations used in this study were moringa seeds and tamarind seeds each with a mass of 0.08 grams and 0.09 grams. In this study, the results of the most optimal seed composition for purifying borehole water were tamarind seeds at a mass variation of 0.08 gram with a turbidity value of 0.53 NTU and a value of iron (Fe) content of 0.0087 mg/L. This shows that the drilled well water that has gone through the water purification process meets the PERMENKES RI standard No. 32 of 2017.
ANALISIS MEKANIK DAN TERMAL MATERIAL KOMPOSIT BERBASIS SERAT ECENG GONDOK SEBAGAI BAHAN KEMASAN RAMAH LINGKUNGAN Acep Musliman; Fitri Damayanti
JOURNAL ONLINE OF PHYSICS Vol. 9 No. 1 (2023): JOP (Journal Online of Physics) Vol 9 No 1
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v9i1.28125

Abstract

This study aims to analyze the mechanical and thermal properties of water hyacinth fiber-based composite materials as an alternative to environmentally friendly packaging materials. This composite material is produced by mixing water hyacinth fiber with a natural polymer matrix that can decompose easily. Manufacturing methods include mixing, pressing, and thermal treatment processes. The mechanical properties of composite materials, including tensile strength and resistance to deformation, are tested using tensile tests and hardness tests. Thermal analysis is carried out through thermogravimetric tests (TGA) to identify the thermal stability and decomposition of the material. The results showed that the water hyacinth fiber-based composite materials had fairly good mechanical properties in certain mixture compositions, although they were not as strong as composite materials using synthetic fibers. However, this material shows potential in packaging applications that do not require extreme mechanical strength. The mechanical properties of the water hyacinth fiber composite produced lead to the fulfillment of the need for use as packaging, which is light, flexible and not easily broken. The thermal properties of the composites show faster decomposition compared to synthetic fiber based composites, but are still within the acceptable range for single-use packaging. With its environmentally friendly properties, this composite material can be an attractive alternative to reduce the use of plastic in the packaging industry. Nonetheless, improvements in manufacturing processes and material formulations are still required to improve their mechanical and thermal properties and maintain packaging durability under diverse usage conditions.

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