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Jurnal Fisika FLUX
Published by Universitas Lambung Mangkurat
ISSN : 1829796X     EISSN : 25411713     DOI : -
Core Subject : Science, Education,
Earth & Planetary Sciences Education Materials Science & Nanotechnology Physics
Jurnal Fisika FLUX is a peer-reviewed, open access journal that publishes original research articles, review articles, as well as short communication in all areas of physics including applied physics, which includes: physics instrumentation and computation, biophysics, geophysics, physics materials, theoretical physics, and physics education. Journal use single peer reviewed to publish. This journal is published by Universitas Lambung Mangkurat Press. ISSN 1829-796X (print) and ISSN 2541-1713 (online) Jurnal Fisika FLUX is published twice a year. Articles will be peer reviewed first. Once ready to be published immediately on the current edition.
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Articles 555 Documents
 48   49   50   51   52 
Analysis of Seismicity Level and Coulomb Stress Changes in the Central Sulawesi Region in 1996-2022 Lailatul Husna Lubis; Ratni Sirait; Dhiau Rahman Fikri
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat Vol 20, No 1 (2023): Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/flux.v20i1.14273

Abstract

Central Sulawesi is an area that is prone to earthquakes. The movement of the Palu Koro Fault is the trigger for most of the destructive earthquakes in the Central Sulawesi region. This study aims to analyze seismicity based on the seismotectonic parameter b-value, analyze coulomb stress changes and based on the seismicity level analyze the risk of earthquakes in Central Sulawesi in the 1996-2022 range. This study uses data from the 1996-2022 earthquake catalog from the USGS catalog. Data from the USGS catalog was then processed using Zmap v6 based on MATLAB to obtain the b-value seismicity parameter using the maximum likelihood method. Data processing for coulomb stress is processed using MATLAB based Coulomb 3.4.2 software. Based on the results of the analysis, the b-value in zone 1 to zone 3 is 0.653 – 0.777. The results of the analysis of changes in coulomb stress obtained positive coulomb stress changes indicated by the red lobe with  a value of 1 to 8 bar and negative coulomb stress changes indicated by the blue lobe with a value of -1 to -8 bar. The results of the analysis of b-value and coulomb stress showed that the b-value obtained was relatively  low and correlated with a high level of change in coulomb stress. In general, earthquake-prone areas are located in the western and eastern parts of Central Sulawesi.
Analysis of Mechanical Properties of Bioplastics Based on Banana Peel Starch with Variations of Rice Straw Cellulose Ety Jumiati; Miftahul Husnah; Sri Ayu Lestari
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat Vol 20, No 1 (2023): Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/flux.v20i1.14067

Abstract

Plastic waste is a serious problem for society because it harms the environment. The manufacture of bioplastics as a substitute for conventional plastics is still being developed to produce healthy and safe plastic packaging. This study aims to see how the mechanical characteristics obtained from the manufacture of plastic from natural materials by utilizing waste plantain peels and rice straws which are commonly found in Indonesia. Variations in composition in the manufacture of bioplastics using a mass ratio of rice straw cellulose and plantain peel starch include sample A (0:2); sample B (0.25:1.75); sample C (0.5:1.5); sample D (0.75:1.25) and sample E (1:1) (w/w). The process of making bioplastics is carried out by heating all materials using a hot plate at 70℃ for 1 hour. The characterization carried out in this study was a test of tensile strength, percent elongation, and modulus of elasticity. The test results show that the bioplastic with the best composition variation is found in sample E with a tensile strength value of 114.51 kgf/cm2, an elongation test value of 3.99%, and a modulus of elasticity of 2873.97 kgf/cm2. The tensile strength test value in this study was by ASTM D882-12, which is 104.72 kgf/cm2, and the value of the modulus elasticity is close to the ASTM D882-12, which is 3163.81 kgf/cm2.KEYWORDS : bioplastic; banana peel starch; rice straw cellulose, mechanical characteristic.  
GIS Scoring and Overlay Methods for Mapping Landslide Vulnerability in Lebak Regency, Banten Sandri Erfani; Muhammad Naimullah; Denta Winardi
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat Vol 20, No 1 (2023): Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/flux.v20i1.15057

Abstract

Landslide hazard mapping using a geographic information system (GIS) is essential because it helps reduce disaster risks and protects communities from their impacts. In landslide hazard mapping, scoring and weighting methods and overlay analysis help determine the level of landslide vulnerability. The research data uses several parameters, including soil type, geology, rainfall, land cover, and slope. The slope was determined based on the Digital Elevation Model Shuttle Radar Topography Mission (DEM SRTM) data. The tools used are ArcGIS v10.8 software and Microsoft Office 2019. Lebak Regency has quite a lot of rainfall, especially during the rainy season, with moderate to dry intensity ranging from 1,501-2,000 mm/year and 2,001-2,500 mm/year. Stones that are easily worn and corroded are more vulnerable. Steep slopes can increase the risk of landslides, especially in areas with slippery soil types. Land cover converted to plantations or settlements tends to be more vulnerable than untouched land. Lebak Regency consists of 3 landslides: low, medium, and high. The area of low risk is 3,854.57 ha, the medium risk area is 160,884.09 ha, and the high-risk area is 164993.60 ha. Landslide-prone areas with a predominance of landslide vulnerability are shown in low level found in Wanasalam District, with an area of 2,800.91 ha or 0.08%; moderate level is found in Cileles District, with an area of 14,001.21 ha or 0.042%, and the high level is found in Cibeber District with an area of 32,501.61 ha or 0.098%.
Analysis of Liquefaction Potential Based on Seismic Wave Velocity in Bengkulu City Arif Setiawan; Della Zakia Sholeha; Alfata Kausari; Arif Ismul Hadi
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat Vol 20, No 1 (2023): Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/flux.v20i1.15243

Abstract

Bengkulu City has a high liquefaction rate, both geologically and geophysically. This is because Bengkulu City consists of rocks in the form of sand, silt, mud, clay, coral fragments and gravel in alluvial areas (Qa) and floodplains. Terrace formation (Qat). This study aims to analyze liquefaction potential using seismic waves in Bengkulu City, resulting in a layer profile (Vs) obtained from the Vs30 soil of Bengkulu City and a classification of areas with liquefaction potential. This study was conducted using a PASI 16S-24P seismograph, a set of seismic equipment used in the study area, which obtained Vs profiles derived from 24 geophones 4 m and 8 m away from each study location. Then, the RMS error and standard deviation values were generated. The result of MASW analysis data describes the Vs and Vs30 profiles in the Bengkulu City subsoil that can be classified into soil zones. Soil results at the study site show different site classes, namely B, C, D and E. Liquefaction potential can be analyzed with Vs profiles. It shows the existence of different layers in the Bengkulu city area. It can be seen that Bengkulu City is dominated by sand and gravel, causing very high liquefaction, especially in the Surabaya area, where the Vs and Vs30 soil values have soft soil values with sensitivity values of 134.0 to 171.0 m/s. Soil classification is highly sensitive to liquefaction. The study areas of Lempuing and Rawa Makmur sub-districts generally show medium liquefaction potential, and the Teluk Sepang sub-district area shows low liquefaction potential.
Utilization of Solar Panels as a Source of Electrical Energy in Alternating Current (AC) Water Pump Masthura Masthura; Armansyah Armansyah
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat Vol 20, No 1 (2023): Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/flux.v20i1.14421

Abstract

Solar panels are an alternative power generation system sourced from the absorption of solar energy. The solar energy absorbed will convert into a source of electricity. The solar panel's power drives an alternating current (AC) water pump. This study aims to determine the performance of the AC water pump by utilizing electrical energy sourced from solar panels. The parameters measured are voltage, current, and power generated by the AC water pump at varying times. The solar panels used with a capacity of 100 WP were connected to a solar charge controller (SCC), which was connected to a battery, and an inverter functions as a tool to convert DC  to AC. The results were obtained from solar panels that can optimally drive the AC water pump. At 10.00 WIB, the electric voltage was 17.68 volts, the electric current was 4.98 amperes, and the electric power was 88.04 Watts. At 15.00 WIB, with clear weather conditions,  an electric voltage of 18.90 volts, an electric current of 6.22 amperes, and an electric power of 117.55 Watts were obtained.
Recent Progress of ZnO-Based Nanoparticle: Synthesizing Methods of Various Dopant and Applications Nurlaela rauf
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat Vol 20, No 1 (2023): Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/flux.v20i1.16044

Abstract

This review focus on the effect of doping rare earth metals, transition metals, noble metals, poor metals, and non-metals on ZnO nanoparticles. ZnO is a semiconductor material with an average wide energy band gap of 3.2 eV. The doping is used to improve the properties of ZnO which strongly depend on their application. The concentration of doping, the type of doping and the process using sol-gel, hydrothermal and precipitation methods are affected in modifying the ZnO lattice parameters. The transition metal widely used for photocatalysts and sensors. The doped application of ZnO nanoparticles as a semiconductor material has proven advantageous in enabling various photocatalytic, glucose biosensors, VOC detection sensors, antibacterial, biomedical, and optoelectronic spintronic, LED, NLO, and silicon solar cells. This review provided information for scientist in choosing the synthesizing methods of ZnO with desired properties and application in future.
The Effect of Annual Apparent Motion of the Sun on the Early Oscillation of Shubuh Prayer Time (Case Study of Pontianak City) Asep Saefullah; Diana Ayu Rostikawati; Yuant Tiandho
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat Vol 20, No 2 (2023): Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/flux.v20i2.15899

Abstract

This Study aims to determine the effect of the Sun's annual apparent motion on the oscillations of the Subuh prayer time, especially in the city of Pontianak. The research method used is the literature review or reference method. In the literature review, the things that were done included: looking for the schedule of the dawn prayer in the city of Pontianak over one year, knowing the geographical position of the city of Pontianak, the apparent annual motion of the Sun, and the effect of the annual apparent motion of the Sun on the initial oscillation of the Subuh prayer time. Apart from that, another thing done in the literature review was to look for the influence of the earth-sun distance on the oscillations of the dawn prayer time. The results showed that there were similarities between the oscillations of the annual apparent motion of the Sun and the oscillations of the dawn prayer time in the city of Pontianak. However, there is a time difference with an average of 41 days between the oscillation of the Sun's annual apparent motion and the oscillation of the time of the Subuh prayer. The results of the Study also show that the distance from the Earth to the Sun (aphelion and perihelion) affects the initial oscillation of the dawn prayer time. When the Earth is at the aphelion point, the time for the Subuh prayer falls later than usual. Meanwhile, when the Earth is at perihelion, the time for the dawn prayer falls faster than usual.
Microzonation of Landslide Potential Areas Using the Microtremor Method in the North Bengkulu - Lebong Regency Ardika Pratama Panjaitan; Ronni Saragih; Anggiat Hutahuruk; Suhendra Suhendra
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat Vol 20, No 2 (2023): Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/flux.v20i2.14957

Abstract

The road crosses the North Bengkulu district to the Lebong district is one of the areas where landslides frequently occur in Bengkulu province. The occurrence of landslides can be caused by high rainfall, steep hillsides, high levels of soil vulnerability, and others. This study aims to map landslide-prone areas build on indicators of the natural frequency value (f0), the amplification value (A0), and the soil vulnerability value (Kg). Measurements from this study used the PASI Mod Gemini 2 Sn-1405 seismometer for ± 30 minutes at 25 measurement points. Geopsy software is used for microtremor data processing to obtain the H/V curve. The results obtained are dominant frequency values between 1.3 – 7.6 Hz, amplification factor values between 1.6 – 6.93, and seismic vulnerability index values 0,5 – 8. After getting the values of these parameters, a distribution map is made based on the values of each parameter, making distribution map using surfer software by merging the values of each parameter and the coordinates of the research location points. Based on the values of these parameters it can be concluded that the areas that have the potential for landslides are in the area of points T1, T6, and T25.
Briket Sabut Kelapa (Cocos nucifera L.) sebagai Bahan Bakar Alternatif Berbasis Sumber Daya Alam Lokal/Coconut (Cocos nucifera L.) Coir Briquettes as an Alternative Fuel Based on Local Natural Resources Yelfira Sari; Putri Ade Rahma Yulis
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat Vol 20, No 2 (2023): Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/flux.v20i2.15337

Abstract

One of the practical and efficient products of biomass processing is briquettes. Briquettes are densified products in the form of cubic, prism, or cylindrical shapes. One of the biomass produced from abundant agricultural waste in Riau Province is coconut coir. This is because Riau Province is one of the largest coconut-producing regions in Indonesia. The utilization of coconut coir waste is currently still limited to crafts, fuel, and planting media. This study aims to produce briquettes from a waste of old coconut coir and young coconut coir with the stages of the research process including cleaning, drying, grinding, adding adhesive, and densification. The resulting briquettes were then subjected to laboratory tests to determine the physical characteristics of the briquettes based on SNI No. 1/6235/2000 and structural characteristics using SEM and TG/DTG. The results showed that laboratory tests for old coconut coir briquettes and young coconut coir based on water content were 28.11% and 29.72%; based on ash content are 1.59% and 2.21%; based on the carbon content are 25.10% and 24.94%, and the heating value is 3019.54 cal/g and 3137.03 cal/g. For SEM analysis, the surface morphology of the briquettes looked smooth and there was no fragmentation indicating that the biomass was perfectly bonded with the binder used. Meanwhile, in the TG/DTG analysis, the results showed that there had been a mass decrease of around 90% for old coconut coir briquettes and 78% for young coconut coir briquettes at a temperature of around 450oC
Physical Test Results of Used Cooking Oil Using Mangrove Activated Carbon Ratni Sirait; Masthura Masthura; Wulandari Armaya Sembiring
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat Vol 20, No 2 (2023): Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/flux.v20i2.13960

Abstract

Cooking oil is a human need and has a close relationship with our physical health. Cooking oil is used repeatedly, the color and smell of the oil can change at high temperatures. In this study, used cooking oil can be reused by using adsorbents and materials used for mangrove-activated carbon. The purpose of this study was to determine the test results of used cooking oil before and after the adsorbent. This experiment uses the adsorption method with activation temperature variations of 500℃, 600℃, and 700℃. There are several test parameters, namely Odor, Color, and Moisture Content. The test results show the quality of used cooking oil at an activation temperature of 500℃ obtained Normal Odor, Color: Red 8.1, Yellow 14.0 and Blue 4.8, Water Content 0.07% according to SNI 7709.2019.

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