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Donny R. Wenas
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PROGRAM STUDI FISIKA FAKULTAS MATEMATIKA ILMU PENGETAHUAN ALAM DAN KEBUMIAN UNIVERSITAS NEGERI MANADO Jl. Kampus Unima, Kel. Koya, Kec. Tondano Selatan, Minahasa, Indonesia
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Kab. minahasa,
Sulawesi utara
INDONESIA
Jurnal FisTa : Fisika dan Terapannya
Published by Universitas Negeri Manado
ISSN : -     EISSN : 27471691     DOI : https://doi.org/10.53682/fista.xxxx.xxx
Core Subject : Science, Engineering,
Astronomy Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics
Jurnal FisTa : Fisika dan Terapannya merupakan salah satu Jurnal Nasional dalam bidang Ilmu Fisika dan Terapannya di bawah pengelolaan Program Studi Fisika Fakultas Matematika Ilmu Pengetahuan Alam dan Kebumian, Universitas Negeri Manado. Jurnal FisTa : Fisika dan Terapannya memiliki nomor eISSN 2747-1691. Jurnal FisTa : Fisika dan Terapannya diterbitkan pertama kali pada tahun 2020. Hal ini dilakukan, untuk merespon para mahasiswa, dosen dan juga peneliti di bidang Fisika dan Terapannya untuk dapat membagi hasil penelitiannya dalam bentuk artikel ilmiah. Ruang lingkup artikel dalam Jurnal FISTA Fisika dan Terapannya adalah Ilmu Fisika dan Terapannya, diantaranya terkait dengan topik : Fisika Material; Fisika Teori; Fisika Material Lunak; Fisika Komputasi; Fisika Instrumentasi; Astronomi; Fisika Koloid; Geofisika; Elektronika: Fisika terapan terkait lainnya.
Arjuna Subject : Fisika dan Astronomi - Fisika dan Astronomi (Lain-Lain)
Articles 5 Documents
 1 
Search results for , issue "Vol 1 No 1 (2020): APRIL" : 5 Documents clear
STUDI DENSITAS LINEAMENT DAN POLA ALIRAN PERMUKAAN DAERAH MANIFESTASI GEOTERMAL DI SEKITAR DANAU Cyrke A. Bujung
Jurnal FisTa : Fisika dan Terapannya Vol 1 No 1 (2020): APRIL
Publisher : Fakultas Matematika Ilmu Pengetahuan Alam dan Kebumian, Universitas Negeri Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53682/fista.v1i1.55

Abstract

North Sulawesi is an area with a complex geological structure because North Sulawesi is located in a collision zone of three plates at once. Therefore, North Sulawesi has geothermal potential which can be used as a power plant. Surface manifestations associated with surface geological structures can be identified based on lineament analysis on remote sensing images. This study aims to identify the geological structure of the surface of the geothermal area based on its lineament density, flow patterns, and surface manifestations. The surface structure was analyzed by lineament density at the surface by the FFD method. This lineament is assumed to be associated with a fracture or fault which in the geothermal area is generally covered by surface manifestations so that it is difficult to identify. These faults and fractures are assumed to be weak areas where the thermal fluid moves so that they can be a clue to the location of the permeable area or reservoir. The results showed that the high density of surface geological structures is associated with the presence of geothermal manifestations on the surface of the Tondano caldera and its surroundings. The manifested area is an area with a dense flow pattern and is a young volcanic rock.
ANALISIS PANDU GELOMBANG MENGGUNAKAN BRAGG RELECTOR SEBAGAI CLADDING Donny R. Wenas
Jurnal FisTa : Fisika dan Terapannya Vol 1 No 1 (2020): APRIL
Publisher : Fakultas Matematika Ilmu Pengetahuan Alam dan Kebumian, Universitas Negeri Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53682/fista.v1i1.56

Abstract

This study aims to examine the mode that can pass through the waveguide and calculate the filling factor and efficiency of the Bragg Reflector. For that purpose in this research, a program using Matlab has been created to analyze the propagation data of the waves in the material, cylindrical waveguides, and Bragg reflectors. From the results of this study, it has been found that a cylindrical perforated waveguide with a Bragg Reflector as a cladding, is one way to overcome the chromic dispersion of optical fiber materials. This is because the electromagnetic waves traveling through the air (n=1) do not experience dispersion. The replacement of the core material with air requires a sheath that acts as a reflector at a certain wavelength, this sheath is known as a Bragg Reflector. The calculation of the band structure of the Bragg Reflector shows the presence of a bandgap in the coordinates. This pair in the bandgap area experiences the reflection required for the waveguide. From the continuity requirement, the forbidden bandgap shows the mode that can propagate in the optical fiber, the efficiency is calculated and the amplitude and power profile graphs are plotted. From the results of the calculations performed, it is found that each mode has an efficiency of more than 60% and increases for wider cores, both for single-mode and multi-mode.
IDENTIFIKASI MINERAL BATUAN PADA DAERAH MANIFESTASI MATA AIR PANAS DI KOYA KECAMATAN TONDANO SELATAN KABUPATEN MINAHASA MENGGUNAKAN SEM-EDX DAN FTIR Ronaldo B. rey; Cosmas Poluakan
Jurnal FisTa : Fisika dan Terapannya Vol 1 No 1 (2020): APRIL
Publisher : Fakultas Matematika Ilmu Pengetahuan Alam dan Kebumian, Universitas Negeri Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53682/fista.v1i1.57

Abstract

Indonesia's geological conditions make a real contribution to the availability of geothermal energy in Indonesia, the types of rocks that exist in the area of ​​manifestation vary in metal and mineral content. North Sulawesi Province is one of the regions that has alteration rocks which are found in many areas of manifestation of geothermal. The purpose of this study was to determine the composition of elements and types of minerals in altered rocks in the manifestation area of ​​Koya Hot Springs, South Tondano District, North Sulawesi Province. The method used is the electron beam method on SEM, and EDX uses the energy dispersive X-ray and FTIR methods. The results of the analysis on SEM-EDX showed that in sample-1 the rocks in the hot springs had elements containing 30.51% silica (Si) minerals and 69.49% oxygen (O) while in sample-2 oxygen-O 71,89 %, silica (Si) 15.28 % and aluminum (Al) 12.83%. The FTIR spectra of sample-1 with 778 cm-1 and sample-2 779 cm-1 wavenumber are quartz. This result is consistent with SEM-EDX analysis with the mineral composition is Silica (Si) and Oxygen (O).
HILANG PANAS ALAMIAH MANIFESTASI PANAS BUMI DI DAERAH MINAHASA SULAWESI UTARA Satyano Mongan
Jurnal FisTa : Fisika dan Terapannya Vol 1 No 1 (2020): APRIL
Publisher : Fakultas Matematika Ilmu Pengetahuan Alam dan Kebumian, Universitas Negeri Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53682/fista.v1i1.58

Abstract

The area of Minahasa ​​North Sulawesi has potential subsurface geothermal resources. This is evidenced by the appearance of geothermal manifestations on the surface which are scattered in many places. According to the law of energy balance, the heat stored in a reservoir is equal to the heat that escapes to the surface through the discharge area. Therefore, to estimate the amount of heat stored in the geothermal reservoir below the surface, measurement and calculation of the amount of heat that naturally comes out of the surface will be carried out. This study aims to determine the amount of natural heat loss from geothermal manifestations in the Minahasa area, especially in Leilem Village and its surroundings, as well as to determine the amount of geothermal speculative resources below the surface. The method used is a combination of geological and geochemical methods with measurement of physical parameters in the geothermal manifestation. The results showed that the total natural heat loss of geothermal manifestations in Minahasa Regency, especially in Leilem Village, Sonder District was 684,399 KW, while the large speculative resources of the geothermal potential were 6843.99 KW or 6.84 MW.
SIMULASI ALIRAN KONVEKSI FLUIDA DI DAERAH RESERVOIR PANAS BUMI Alamta Singarimbun; Famelia Nurlela
Jurnal FisTa : Fisika dan Terapannya Vol 1 No 1 (2020): APRIL
Publisher : Fakultas Matematika Ilmu Pengetahuan Alam dan Kebumian, Universitas Negeri Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53682/fista.v1i1.59

Abstract

The potential of geothermal energy can be determined by the potential classification based on performed simulation. The simulation results show the quality of geothermal energy utilization can be optimized. Under natural conditions, a geothermal system consists of a heat source, the bedrock layer, reservoir layer, and caprock layers. The process of conduction heat transfer occurs when a heat source to transfer heat to the bedrock and bedrock is heat transfer by convection to the reservoir. The heat transfer process makes the temperature at any depth is different and will change with time. Numerical simulation and modeling of two-dimensional sebara done to simulate the fluid temperature in the geothermal reservoir which satisfies equations of fluid flow in a porous medium for single-phase flow (Darcy's law). The observed parameters are the temperature distribution, pressure, and direction of fluid flow in a reservoir. Didiskritisasi mathematical equations using finite difference or difference-up. The computational process is done by using Matlab software

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