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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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Pemetaan Sebaran Air Lindi TPA Bakung Pada Air Tanah Menggunakan TDS dan Electro conductivity Ofik Taupik Purwadi; Alifah Risa Naprida; Ayu Dwi Cahyarani; Rustadi Rustadi
Jurnal Teori dan Aplikasi Fisika Vol. 13 No. 02 (2025): 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.v13i02.439

Abstract

Tempat Pembuangan Akhir (TPA) Bakung menjadi sarana penampungan sampah di Bandar Lampung, luas lahan mencapai 14,2 ha dan 90% telah tertutup oleh tumpukan sampah. Reaksi kimia berbagai jenis sampah dengan air hujan, telah menghasilkan fluida limbah cair (air lindi). Pengukuran TDS dan electro conductivity dilakukan pada air tanah di sembilan sumur yang terdistribusi secara random menggunakan alat Walfront EZ 9909SP. Air lindi dari TPA Bakung telah menghasilkan paparan cemaran pada air tanah dangkal dengan nilai TDS 332 - 516 Ppm melebihi ambang batas 300 Ppm. Paparan air lindi pada air tanah  menghasilkan peningkatan daya hantar kelistrikan pada air berkisar 660 – 1030 mS/cm. Air lindi dari TPA Bakung memiliki orientasi  penyebaran barat ke timur, dengan paparan telah mencapai radius 1,5 km. Diperlukan pemetaan lebih detil pada air tanah di TPA Bakung untuk mendapatkan posisi sumber kebocoran   Kata kunci: Air lindi Bakung, TDS dan electro conductivity mapping.
Sistem Monitoring Kualitas Air Tambak Budidaya Udang Litopanaeus vannamei Menggunakan NodeMCU ESP32 Berbasis IoT Eza Ariyani; Sri Wahyu Suciyati; Donni Kis Apriyanto; Amir Supriyanto
Jurnal Teori dan Aplikasi Fisika Vol. 14 No. 01 (2026): 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.v14i01.447

Abstract

Abstract. In this research a water quality monitoring system was designed that is capable of monitoring temperature, pH, and Total Dissolve Solid (TDS) using an Internet of Things (IoT)-based NodeMCU ESP32 in the water quality of Litopenaeaus vannamei shrimp ponds. In this study, E201-C BNC Kit version pH sensor, DFRobot TDS sensor and DS18B20 waterproof sensor controlled by ESP32 microcontroller were used. The working principle of this system is that when the sensor is inserted into the shrimp pond, the sensor will detect the water quality. The measurement result will be processed by ESP32 and displayed on LCD and telegram. The telegram application can receive data when measuring using the long poll method. The sensor test mechanism is carried out by comparing the sensor reading with a calibrated device. E201-C BNC version Kit pH sensor tests were conducted using an acid (vinegar) solution, a DFRobot TDS sensor with a TDS-3 meter, and a DS18B20 waterproof sensor using an HTC-2 thermometer. The results of the study show that the sensor can detect pH, TDS, and temperature values ​​with an accuracy of 98.87%, 98.33% and 98.73% for each parameter.   Keywords: ESP32, water quality, monitoring system, shrimp pond, telegram.
Identifikasi Cekungan Sedimen Lokasi Manifestasi Gas Alam Kampung Holtekamp Kota Jayapura Melalui Pemodelan Tiga Dimensi (3D) Berdasarkan Anomali Gravitasi GGMplus Bangkit Sudrajad; Tatang Sutarman
Jurnal Teori dan Aplikasi Fisika Vol. 13 No. 01 (2025): 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.v13i01.451

Abstract

Natural gas is one of the natural resources that are abundant in Indonesia. Papua is one of the regions in Indonesia that has large potential reserves of natural gas, including Jayapura City. The existence of natural gas potential in Jayapura City is indicated by the presence of natural gas bursts that came out during the drilling process of the wells of residents of Holtekamp Village, Muara Tami District, Jayapura City. The gas burst incident that appeared in the Holtekamp Village area was not the first to occur in the Muara Tami District area but the presence of natural gas manifestations has also been found in West Koya. In relation to this, the author took the initiative to conduct geophysical research using the gravity method. This gravity method is used to determine the condition of the subsurface structure regionally. Based on 3D modeling based on GGMplus gravity anomalies, it was obtained that the natural gas manifestation area of ​​Holtekamp Village is in a coastal sedimentary basin and swamp with a depth of 500 meters. In addition, the results of 3D modeling also identified 1 other sedimentary basin with a depth of 1200 meters in the shallow sea area on the Holtekamp coast and 2 other sedimentary basins with depths of 1500 meters and 2500 meters in Youtefa Bay. Keywords: 3D Modeling; GGMplus, Gravity Method; Natural Gas;Sedimentary Basin
Rancang Bangun Penambahan Agitasi pada Alat Pengolah Limbah Fixer dengan Metode Elektrolisis Efita Pratiwi Adi; R. Farzand Abdullatif; Zaroh Irayani; Hizas Azizi
Jurnal Teori dan Aplikasi Fisika Vol. 13 No. 01 (2025): 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.v13i01.452

Abstract

The bubble layer that appears on the electrode causes the surface area of ​​the electrode that interacts with the electrolyte to decrease. This inhomogeneous bubble layer and electrolyte will inhibit the rate of electrolysis. One of the actions to reduce the bubble layer on the electrode and keep the electrolyte homogeneous is by agitation. This study aims to make modifications by adding agitation to the fixer solution waste processing tool with the electrolysis method. The container used is made of plastic with a diameter of 17 cm and a height of 19 cm. The electrodes used are made of 0.8 mm stainless steel with a width of 5 cm and a total length of 18 cm and the length that enters the fixer waste is about 13 cm with a distance between electrodes of 3.5 cm. The tool testing was carried out without agitation and with agitation. Each test will be carried out with voltage variations of 4V, 6V, 8V and 10V. Each test will use 3 liters of fixer waste with a time of 1 hour. The results of this study obtained that the designed tool can work well at a voltage of 4V to 10V and a capacity of 3L, with agitation proven to increase silver mass recovery up to 87.38% with a silver recovery rate at a voltage of 4V of 1.93 g/hour, at a voltage of 6V the silver recovery rate is 2.08 g/hour, at a voltage of 8V the silver recovery rate is 2.24 g/hour and at a voltage of 10V the silver recovery rate is 3.44 g/hour. Adding agitation to the fixer waste processing equipment, it can reduce the sulfidation that occurs and increase the silver mass significantly compared to without agitation. Keywords: Fixer waste, agitation, electrolysis, silver.
Pengujian Material Absorpsi Bunyi dari Serbuk Kayu Menggunakan Tabung Impedansi Dua Mikrofon Felix Marcellino Henrikus; Adita Sutresno; Ferdy Semuel Rondonuwu
Jurnal Teori dan Aplikasi Fisika Vol. 13 No. 01 (2025): 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.v13i01.455

Abstract

A study was conducted to test sound-absorbing materials made from teak wood waste by comparing the effect of the number of holes in the material on its absorption coefficient. This research utilized a two-microphone impedance tube with a length of 1.82 m and a diameter of 0.07 m, where the sound propagation speed was determined by measuring the fundamental frequency based on the open organ pipe principle. By determining this propagation speed, the resonance frequency of the tube was used as the basis for measuring the absorption coefficient, and the microphones were positioned at the nodes and antinodes of the standing wave at each frequency to obtain the standing wave ratio. The results indicated that non-perforated and perforated materials exhibited different absorption patterns, with non-perforated material being more effective in absorbing sound at low frequencies, while perforated material showed a broader absorption effectiveness at medium to high frequencies. Thus, the design of sound-absorbing materials with holes offers a more flexible and adaptive solution for noise control in various environmental conditions, making it a potential innovation in acoustic technology and the development of environmentally friendly materials. Keywords: sound absorption coefficient, acoustic panels, impedance tube, standing waves.
Pencegahan Kejadian Stunting Melalui Analisis Faktor pH Kualitas Air Minum Rumah Tangga Tisar Dewi Pratiwi; Yunita Widia Putri; Dewi Rakhmatia Nur
Jurnal Teori dan Aplikasi Fisika Vol. 13 No. 01 (2025): 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.v13i01.459

Abstract

Stunting is a social urgency in Indonesia that affects the development of health and intelligence of children. Based on data from the Ministry of Home Affairs the percentage of stunted toddlers in Bandar Lampung City is 0.8% or 520 toddlers of the 63,998 toddlers in all Bandar Lampung City Districts. Clean water is one of the causes of stunting. To find out the level Cleanliness of drinking water can be done by measuring the pH value using litmus paper. However, pH measurements are more accurate using Primary standard for calibrating glass electrodes and pH meters. This research aims to map and analyze the pH factors of drinking water as well as the mineral content of the water, so it is hoped that it can be used as a reference or rejection measure against the Bandar Lampung City government and the local community planning health services and human resources. The method This research carried out a survey the pH and metal content of water used for drinking and cooking in households in 19 sub-districts. The results of pH and electrolysis testing showed that the pH and water content in Bandar Lampung City varied greatly from 3.61 to 8.5. On the map, 95 measurement points are spread across sub-districts throughout Bandar Lampung City, with data interpolation tending to be colored yellow, green and blue. This is predicted because several areas in Bandar Lampung City are well maintained so that water quality is maintained and several other areas have experienced pollution and the water in these areas contains dangerous chemicals and even heavy metals.   Keywords: Water, Toddlers, pH, Mineral content of water, Stunting.  
Interpretasi Lapisan Bawah Permukaan Dengan Metode Reduksi ke Kutub dan Pseudogravitasi Berdasarkan Data Geomagnetik Pada Daerah Sesar Lampung-Panjang (Gunung Sulah dan Gunung Banten) Syamsurijal Rasimeng; Muhammad Saipuddin; Annisa Vidia Agustin; Rahmi Mulyasari; Ida Bagus Suananda Yogi
Jurnal Teori dan Aplikasi Fisika Vol. 13 No. 02 (2025): 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.v13i02.460

Abstract

Abstract. Faults are areas where earthquakes and potential mass movement disasters are prone to occur. Mount Sulah and Mount Banten are located in the Lampung-Panjang fault area, which has the potential for mass movement due to this fault. This study aims to determine the subsurface rock arrangement using the magnetic method. Data processing begins with making corrections to obtain the total magnetic anomaly. The total magnetic anomaly is then subjected to upward continuation filtering, separation of residual anomalies, reduce-to-pole transformation, pseudogravity transformation, and 2D modeling. The pseudogravity filter results show similarities with the results of pole reduction. The use of RTP (reduce to pole) method correlated with pseudogravity transformation in processing magnetic anomaly data can interpret the subsurface of a research area. Pseudogravity transformation can be utilized as a supportive factor in making cross-sections on the RTP contour map in the 2D modeling process. The research results indicate that the study area of Mount Sulah and Mount Banten has low magnetic anomaly values, by observing the regional geological map of the research area, including the QTl formation, which has low magnetic susceptibility values and the presence of faults impacting mineral distribution and rock composition, ultimately affecting the magnetic susceptibility value in that area. Based on the 2D modeling, there are three subsurface layers. The first layer consists of clay rock with a susceptibility value of 0.025 SI, estimated to be part of the QTl formation. The second layer is composed of schist rock with a susceptibility value of 0.05 SI, estimated to be part of the Pzg formation. Finally, the last layer is the basement layer of basalt lava with a susceptibility value of 0.43 SI, estimated to be part of the Qhvp formation. Keywords: Pseudogravity, magnetic, fault, RTP. Abstrak. Sesar merupakan daerah dimana rawan akan terjadi bencana kegempaan maupun potensi gerakan massa. Gunung Sulah dan Gunung Banten terletak pada daerah sesar Lampung-Panjang yang berpotensi terjadi gerakan massa akibat sesar tersebut. Penelitian ini bertujuan untuk mengetahui susunan batuan bawah permukaan dengan metode magnetik. Pengolahan data diawali dengan melakukan koreksi-koreksi untuk mendapatkan anomali magnetik total. Anomali magnetik total tersebut selanjutnya dilakukan filter upward continuation, pemisahan anomali residual, reduce to pole, transformasi pseudogravitasi, dan pemodelan 2D. Hasil filter pseudogravitasi memiliki kesamaan dengan hasil dari reduksi ke kutub, penggunaan metode RTP yang dikorelasikan dengan transformasi pseudogravitasi pada pengolahan data anomali magnetik dapat menginterpretasikan bawah permukaan suatu daerah penelitian. Transformasi pseudogravitasi dapat dimanfaatkan sebagai faktor pendukung dalam melakukan sayatan pada peta kontur RTP dalam proses pemodelan 2D. Hasil penelitian menunjukkan bahwa daerah penelitian Gunung Sulah dan Gunung Banten memiliki nilai anomali magnetik yang rendah, dengan mengamati peta geologi regional daerah penelitian termasuk dalam formasi QTl yang mana memiliki nilai suseptibilitas magnetik yang rendah serta adanya sesar berdampak pada distribusi mineral dan komposisi batuan, yang akhirnya mampu mempengaruhi nilai suseptibilitas magnetik di area tersebut. Berdasarkan pemodelan 2D terdapat 3 lapisan bawah permukaan, pada lapisan pertama merupakan batu lempung dengan nilai suseptibilitas 0,025 SI yang diperkirakan bagian dari formasi QTl, lapisan kedua merupakan batu sekis dengan nilai suseptibilitas 0,05 SI yang diperkirakan bagian dari formasi Pzg. Kemudian lapisan terakhir yaitu lapisan basement lava basalt dengan nilai suseptibilitas 0,43 SI yang diperkirakan bagian dari formasi Qhvp. Kata kunci: pseudogravitasi, magnetik, sesar, RTP.
Analisis Kawasan Pembangunan Bandara Udara Internasional Yogyakarta dalam Kajian Seismik Refraksi Tisar Dewi Pratiwi; Mitranikasih Laia; Rohmawati Metaningrum
Jurnal Teori dan Aplikasi Fisika Vol. 13 No. 02 (2025): 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.v13i02.461

Abstract

Penelitian ini dilakukan untuk mengetahui studi awal dalam proses perencanaan pembangunan bandara udara internasional pada kawasan Yogyakarta khususnya di Kecamatan Temon, Kabupaten Kulon Progo. Pembangunan bandara udara seharus mempertimbangkan beban berat pada masing-masing pesawat terbang yang akan beroperasi dikawasan tersebut dan dapat mengkaji struktur lapisan bawah permukaan. Adapun tujuan dalam penelitian ini yaitu menentukan kondisi lapisan bawah permukaan berdasarkan analisis kecepatan gelombang (Vp) dengan menggunakan metode seismik refrkasi. Pengukuran diakukan sebanyak sebelas lintasan dengan panjang lintasan yang diambil sebesar 92 meter. Data dari penelitian ini diolah menggunakan metode Hagiwara. Hasil yang diperoleh dalam penelitian ini yaitu  pasir lepas dan endapan pasir. Sedangkan lapisan kedua yang diduga sebagai sand yang lebih kompak, lebih basah dan terdapat campuran lempung ditutupi oleh sand yang cukup tebal. Kondisi pembangunan bandara udara khususnya pada landasan pacu yang relatif datar dari aspek litologinya maka kondisi tersebut kurang medukung dalam segi pembangunan. Hal ini terjadi karena kondisi landasan pacu lebih dominan lapuk, lepas, sehingga diperlukan adanya proses pengerasan terlebih dahulu dengan kualitas yang    tinggi.   Kata kunci: Seismik Refraksi, Metode Hagiwara, Struktur Bawah Permukaan, Karakterisasi Geoteknik, Litologi
Analisis Gas Buang Insinerator dengan Filter Arang Aktif Berbasis Limbah Organik Fajriyah Rafidah; Fitriyanti; Kurniati Abidin
Jurnal Teori dan Aplikasi Fisika Vol. 13 No. 01 (2025): 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.v13i01.465

Abstract

This study aims to analyze the effectiveness of organic waste-based activated charcoal in filtering flue gas from incinetors. With the increasing volume of solid waste and the negative impact of harmful gas emissions, it is important to find sustainable and environmentally friendly solutions. The activated charcoal used in this study is produced from agricultural waste, namely corn cobs and candlenut shells, which are abundant and can be optimally utilized. The analytical method applied includes measuring exhaust gas levels before and after filtration using activated charcoal. Measurements were made to identify the concentration of various pollutants, including carbon monoxide (CO) and sulfur dioxide (SO2), which are known as harmful gases to human health and the environment. The data obtained shows that without a filter, the concentration of CO is 0 ppm and SO2 is 473 ppm, while after using the activated carbon filter, the concentration of CO increases to 2.775 ppm and SO2 decreases to 56 ppm. For nitrogen dioxide (NO2), the concentration remains 0 ppm both before and after filtration. The results indicated that the use of activated charcoal can significantly reduce the concentration of these harmful gases, with varying degrees of efficiency depending on the type waste used as raw material. This research provides valuable insights into the utilization of organic waste as a solution in air pollution control. In addition, the results are expected to encourage the development of more efficient filtration technologies utilizing local resources. Thus, this research not only contributes to waste management, but also to overall environmental protection. Keywords: incinerator, activated charcoal, organic waste, flue gas filtration, air pollution.
Penentuan Diagnostic Reference Level Pemeriksaan Thoraks Postero-anterior (PA) dengan Klinis Tuberkulosis Muhammad Irsal; Shinta Gunawati Sutoro; Saifudin; Rizki Amalia
Jurnal Teori dan Aplikasi Fisika Vol. 13 No. 01 (2025): 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.v13i01.467

Abstract

Diagnostic reference level (DRL) based on clinical indication of tuberculosis (TB) in chest postero-anterior (PA) examination is still rare. Therefore, this study is expected to be used as an indicator of radiation dose in the optimization protocol. The research method was retrospective, based on the data of chest PA examination exposure parameters of TB clinical and non-TB clinical patients. The study was conducted in June-October 2024 at Hospital A for clinical TB patients, Hospital B, and Hospital C for non-TB patients. Data on exposure parameters were collected and analyzed with descriptive statistics, determination of DRL values was based on the calculation of quartile-2 values, then the DRL value of PA thoracic examination for clinical indications of TB will be compared with the Indonesian national DRL value. The results showed that the DRL value for clinical indications of TB was 0.3 mGy, which is lower than the Indonesian national DRL value. In the future, the determination of the DRL value is based on clinical indications so that the optimization protocol is adjusted to the image quality and the required radiation dose so that the diagnosis will be more accurate and prevent patients from unnecessary exposure. Keywords: Diagnostic reference level (DRL), Chest postero-anterior (PA) examination, Tuberculosis (TB).

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