Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat

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ISSN / EISSN : 1829-796X / 2541-1713
Total articles ≅ 112
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Muhammad Faizal Zakaria
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat, Volume 18, pp 75-82; doi:10.20527/flux.v18i1.8526

Abstract:
Depth analysis of the gravity anomaly source using Spectral Statistical Technique has been carried out in the Godean area, Yogyakarta. This research was conducted to determine the depth of the formation in the study area. This study used 56 gravity acquisition points spread over 2 lines along 12 km east-west direction. Depth analysis is carried out from the Complete Bouguer Anomaly profile. Spectral Statistical Technique is used as a method of determining depth by calculating the slope of the graph Ln (PS) vs k. The results of these calculations are obtained slope of 2 types of anomalies, namely deep anomalies and shallow anomalies. The deep anomaly has a slope of -9704, while the shallow anomaly has a slope of -279. The depth of the anomalous source in the study area has a value of 770 m for deep anomalies interpreted as Nanggulan formations, and 22 m for shallow anomalies interpreted as the Merapi Muda Volcano Deposition.
Kasum Kasum, Fajar Mulyana, Mohamad Zaenudin, Adhes Gamayel, M. N. Mohammed
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat, Volume 18, pp 67-74; doi:10.20527/flux.v18i1.8548

Abstract:
Creep mechanism is an essential mechanism for material when subjected to a high temperature and high pressure. It shows material ability during an extreme application to maintain its structure and properties, especially high pressure and temperature. This test is already done experimentally in many materials such as metallic alloys, various stainless steel, and composites. However, understanding the creep mechanism at the atomic level is challenging due to the instruments limitation. Still, the improvement of mechanical properties is expected can be done in such a group. In this work, the creep mechanism of the nanocrystalline Cu-Ni alloy is demonstrated in terms of molecular dynamics simulation. The result shows a significant impact on both temperature and pressure. The deformation supports the mechanisms as a result of the grain boundary diffusion. Quantitative analysis shows a more substantial difference in creep-rate at a higher temperature and pressure parameters. This study has successfully demonstrated the mechanism of creep at the atomic scale and may be used for improving the mechanical properties of the material.
Nurlaela Rauf, Heryanto Haeruddin, Roni Rahmat, Dahlang Tahir
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat, Volume 18, pp 56-66; doi:10.20527/flux.v18i1.10128

Abstract:
Technological processes for modification of materials, deposition, and prevented fumes in the pyrolysis processes are used gases materials in the medium with vacuum pressure or atmospheric air pressure. Therefore, it is essential to understand heat flow transport for designing an efficient reactor or find the substrate's excellent position in the reactor or furnace for growing materials. We evaluated the energy transfer phenomena in the form of temperature distribution and heat flow for various heating sources for the gases and solid materials by Gauss-Seidel equation. The thermal conductivity coefficient (k), number of heating sources, and position of heating sources show an essential parameter for transmitting the distribution of the heat. For high k value shows efficiently for heat transfer at low temperature due to the atom's position close each other. The heat also affects to the phonon and lattice vibration like a wave which successfully shows these phenomena in this study.
Rahma Hi. Manrulu, Esse Esse, Hasmarita Hasmarita, Husnia Musda Mulia, Aryadi Nurfalaq
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat, Volume 18, pp 9-15; doi:10.20527/flux.v18i1.6799

Abstract:
Telah dilakukan penelitian bidang Geofisika dengan metode geolistrik tahanan jenis di Dusun Kelapa Dua Kecamatan Burau Kabupaten Luwu Timur, bertujuan untuk mengetahui kedalaman akuifer air tanah berdasarkan peta litologi menggunakan metode geolistrik tahanan jenis konfigurasi Schlumberger. Jumlah lintasan pada penelitian ini yaitu sebanyak 2 lintasan dengan panjang lintasan masing-masing 200 meter. Pengolahan data geolistrik dilakukan dengan menggunakan software IP2WIN, pemodelan 3D menggunakan software Surfer dan pembuatan peta litologi menggunakan software ArcGIS. Hasil interpretasi data dicocokkan dengan kondisi geologi daerah penelitian dan tabel resistivitas tiap batuan. Batuan yang merupakan akuifer adalah material pasir dengan rentang nilai resistivitas 10-100 Ωm. Hasil yang diperoleh pada lintasan 1 akuifer berada pada kedalaman 9-27,88 meter dengan nilai resistivitas 57,25-60,19 Ωm, pada lintasan 2 letak akuifer berada pada kedalaman 3-25,08 meter dengan nilai resistivitas 14,71- 57,84 Ωm.
Sudarningih Sudarningsih
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat, Volume 18, pp 1-8; doi:10.20527/flux.v17i2.7089

Abstract:
Telah dilakukan penelitian untuk mengetahui konsentrasi logam berat pada sedimen permukaan Sungai Martapura, Kalimantan Selatan. Penelitian ini penting dilakukan, mengingat Sungai Martapura merupakan sumber air bersih untuk PDAM Bandarmasih (Perusahaan Daerah Air Minum Banjarmasin), namun saat ini sungai Martapura sudah menunjukkan adanya pencemaran. Sampel sedimen permukaan diambil dari sepanjang Sungai Martapura yang dimulai dari daerah Bincau Muara, Kabupaten Banjar sampai Basirih, Kota Banjarmasin. Kandungan logam berat (Cu, Zn, Mn, Fe, dan Hg) dalam sampel sedimen Sungai Martapura diukur menggunakan instrumen Spektroskopi Serapan Atom (SSA). Hasil analisis menunjukkan konsentrasi logam berat tertinggi sampai terendah adalah Fe (48.00068.800 ppm), Mn (494-22,142 ppm), Zn (79-161 ppm), Cu (4082 ppm) dan Hg (0,0925,775 ppm). Hasil analisis juga menunjukkan bahwa sedimen permukaan Sungai Martapura ini tidak mengandung Cu dan Zn.
Rahmat Basuki, Ninis Hadi Haryanti, Suryajaya Suryajaya, Sadang Husain
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat, Volume 18, pp 42-49; doi:10.20527/flux.v18i1.8386

Abstract:
Synthetic polymer polyethylene LDPE has been grafted with natural polymers of banana talas (Musa paradisiacal Var sapientum L.) peels flour. The aim of this research is to make compossed plastic of the thermoplastic banana peels flour with LDPE resins plastic based on mechanic and degradation behaviours. Low Density Polyethylene (LDPE) resins, glycerol, banana peels, humus soil, xylene p.a as the raw materials. Thermoplastic banana peels flour produced by added 30% glycerol concentration and then by aging for 2 weeks. The mixing of the thermoplastic banana peels flour with LDPE resins using a ratio of 1:3, 2:3 and 3:3. Xylene (coupling agent) 6 times of the total mass were added to increase compatibility between thermoplastic banana peels flour and LDPE. The mechanical properties of composite were analyzed using ASTM D638 method and the biodegradation capability composite were charactherized using soil burial test method. The results show that tensile strength in the ratio of 1:3, 2:3, 3:3 respectively were 28.94 kg/cm2, 36.16 kg/cm2, 29.94 kg/cm2. The percentage of residual weight show the biodegradation capability in the ratio of 1:3, 2:3, 3:3 was 98.46%, 97.67%, 98.24%. Mixing ratio of 2:3 thermoplastic banana peels flour and LDPE has the best value of tensile strength and degradation capability. Mixing ratio of 2:3 thermoplastic banana peels flour and LDPE has the best value of tensile strength and degradation capability.
Uswatun Chasanah, Siti Diah Ayu Febriani, Eko Minarto
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat, Volume 18, pp 25-34; doi:10.20527/flux.v18i1.8456

Abstract:
-Merapi Mount (2978 msl) is the higher active volcanoes in Indonesia, which is located between Sleman district, DI. Yogyakarta, and Magelang district, Boyolali district, Klaten district, Central Java. The eruption center of Merapi Mount is controlled by weak or unstable zone. This weak or unstable zone can be known from several lithologies of rock, which lies below Merapi Mount's surfaces through the density differences. One of the methods for determining the subsurface density in geophysics science is the gravity method. The gravity method is based on the difference in mass below the surface. This research aims to determine the distribution pattern lithology of Merapi Mount based on the density differences. Data processing in this research covers the entire process begins with a reading tool in field to obtain Bouguer anomaly's values at every point. To know the appearance below the Merapi Mount surface, creating some structure lithology modeling using software surfer 10 and Grav2DC. The result obtained in this research indicated that lithology below the surface of Merapi Mount. The variant of rocks density is between 2,256- 3,298 g.cm-3. Most of them are sedimentary rock such as sandstone, granite, and basalt. Where the whole rocks an abundance of cold lava of Merapi Mount.
Rhizal Alfian Abdul Gani, Yohanes David Sokoy, Derlin Lena Samolo,
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat, Volume 18, pp 50-55; doi:10.20527/flux.v18i1.6933

Abstract:
Activated carbon is a carbon with an amorphous structure arranged in a parallel hexagonal ring. In this research, activated carbon has been synthesized from sago waste. The purpose of this research was to synthesize activated carbon with ZnCl2 activator and investigate the effect of ZnCl2 activator concentration on the characteristics of activated carbon. Synthesis of activated carbon was carried out with the following stages: dehydration, carbonization, silica extraction with NaOH and ZnCl2 activation with variations in concentrations of 5, 15 and 20%. The characterization of activated carbon was carried out by analyzing the crystal structure and morphology, which was conducted using a scanning electron microscope and x-ray diffractometer. The characterization results showed that the best activated carbon was synthesized from 15% ZnCl2 activator due to its amorphous structure with a relatively small pore size of 2 µm.
Muhajir Muhajir, Nazli Ismail, Saumi Syahreza, Andrean V H Simanjuntak
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat, Volume 18, pp 35-41; doi:10.20527/flux.v18i1.8746

Abstract:
Climatologically, Aceh is influenced by global, regional, and local phenomena strongly influenced by the hilly mountain topography. Aceh is also surrounded by Indian Ocean in the west, Malacca Strait in the east and Andaman Sea in the north that making climate conditions more varied. The old season zone is not compatible to explain this condition. This paper makes an updated analysis by combining the observational and satellite data for rainfall activity explanation. We use k-means clustering based on the analysis of blending data between observation data and satellite imaging that produces more specific and updated season zone (ZOM). The clusters obtained are newly season zones that provide more specific mapping for dry and rainy season information. The updated season zone of 15 ZOM clusters based on k-means can figure a clear variation that means the accuracy of difference rainfall value can be more precise. From this research, the updated season zone can provide effective planning about strengthened from various government sectors in the future that can give a better policy to the public community.
Marjuni Marjuni, Ori Minarto, Sri Cahyo Wahyono
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat, Volume 18, pp 16-24; doi:10.20527/flux.v18i1.8888

Abstract:
Distilled water in the laboratory is highly important since it is a basic requirement in the lab work and/or research. The large use of distilled water in the Faculty of Mathematics and Natural Sciences University of Lambung Mangkurat (FMIPA ULM) obliged to depend on its own by providing the equipment to produce distilled water. The efficiency of water is low during producing one liter distilled water due to 35 liters is needed. Several studies have conducted focusing on the energy efficiency and the use of alternative energy in the distilled water production. Efficiency is not only limited on the heating energy sources, but also the cooling component. One of the attempts is modifying the cooling water circulation in the distillation equipment. It aimed that the cooling water is not wasted but is returned to the circuit. In this study, a cooling water circulation modification was carried out by adding a radiator set, submersible pump and storage tank. The distilled water produced from this circuit will be compared with distilled water from distillation equipment without modification. The parameters compared which are: temperature, volume, electrical conductivity and pH. Our research results show that the modified distillation equipment series is feasible to apply since the electrical conductivity of the resulting distilled water is lower than before modification process and also the sediment attached to the boiler wall is formed slower than the distillation equipment without modification. With the need for a lower volume of raw water, a series of modified distillation equipment is also suitable for use in the dry season or during water distribution is not smooth.
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