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All Journal Jurnal Penelitian Pendidikan IPA (JPPIPA) DWIJA CENDEKIA: Jurnal Riset Pedagogik Fullerene Journal of Chemistry SOSCIED Jurnal Fisika Indonesia Frontiers Sciening : Science Learning Journal Charm Sains : Jurnal Pendidikan Fisika Konstanta: Jurnal Matematika dan Ilmu Pengetahuan Alam Jurnal Arjuna : Publikasi Ilmu Pendidikan, Bahasa dan Matematika Jurnal FisTa : Fisika dan Terapannya
Alfrie Musa Rampengan
Universitas Negeri Manado
Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Other

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ANALISIS EKSERGI DAN OPTIMASI PEMBANGKIT LISTRIK TENAGA PANAS BUMI LAHENDONG UNIT-2 Armando Ariakta Aloanis; Heindrich Taunaumang; Alfrie Rampengan; Jeferson Polii
Jurnal FisTa : Fisika dan Terapannya Vol 2 No 2 (2021): OKTOBER
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.v2i2.131

Abstract

Geothermal development is carried out by increasing the efficiency of existing generators. In this study, geothermal development at the Lahendong Unit-2 geothermal power plant is carried out by conducting exergy analysis and optimizing geothermal plant efficiency using a genetic algorithm by adjusting the pressure on the separator. Exergy calculations and optimization of genetic algorithms, using the Python programming language with the help of libraries such as PyXSteam, Pandas, Numpy, matplotlib, random, and time. Exergy flow and efficiency are calculated on the components of the separator, turbine, condenser, cooling tower, and the entire plant. The amount of exergy that enters the generator from geothermal fluids is 28882.73 kW. The amount of exergy that comes in produces an output power of 13,000 kW with an overall efficiency of the generator is 45.010%, and the amount of exergy from brine is 1794.11 kW. Optimization using the genetic algorithm method produces the most optimal output power value of 13035,480445 kW at a separator pressure of 10.4025 bar. The increased quality of the steam generates this increase in power so that the mass flow rate of the steam that rotates the turbine becomes more than before.
PROFIL VERTIKAL DAN LUAS BIDANG DINAMIKA HARIAN GRADIEN SUHU UDARA DI ATAS PERMUKAAN AIR LAUT DAN DI DALAM AIR LAUT Erixio Mewoh; Patricia Silangen; Alfrie Rampengan; Christophil Medellu
Jurnal FisTa : Fisika dan Terapannya Vol 2 No 2 (2021): OKTOBER
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.v2i2.133

Abstract

The temperature in sea water varies at each depth. The temperature of sea water at the surface is higher and the temperature at a deeper point is decreasing slowly. This study aims to determine the model of the temporal, spatial function, and dynamic models of daily temperature gradients above sea level and in sea water. This type of research is included in the type of exploratory research that is quantitative in nature. The research is in Tulaun hamlet, Lalumpe Village, Kombi District, Minahasa Regency, North Sulawesi Province, Indonesia. The research was conducted for 24 hours at 9 points, ranging from 0 cm, 10 cm, 30 cm, 60 cm, 100 cm, 150 cm, 220 cm, 300cm, to 400cm. The research variables were temperature and light intensity. Data processing in this study is to enter existing data into the Matlab application. The results of the study of changes in the functional model above sea level and in seawater are influenced by the heat absorption process of air temperature.
PROFIL VERTIKAL DAN LUAS BIDANG DINAMIKA HARIAN GRADIEN SUHU UDARA DI ATAS PERMUKAAN LAHAN TERBUKA, LAHAN BERVEGETASI DAN PERMUKAAN ASPAL Givraldi Kumentas; Donny Wenas; Alfrie Rampengan; Christophil Medellu
Jurnal FisTa : Fisika dan Terapannya Vol 2 No 2 (2021): OKTOBER
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.v2i2.134

Abstract

This study aims to determine the temporal function model, spatial temperature and dynamic models of air temperature gradients over the surface of open land, vegetated land, and asphalt surface. The research location is at the State University of Manado in the hills of Tonsaru South Tondano, Minahasa Regency. The research methodology was carried out on three transects at nine altitude positions for 24 hours of measurement time, measuring positions ranging from the ground level to 0cm, 10cm, 30cm, 60cm, 100cm, 150cm, 220cm, 300cm, to 400cm. Data processing carried out in this study is by entering data on air temperature, the measured ground surface into the Matlab application. It can be shown that temporal changes and vertical spatial variations in air temperature show different but relatively the same curve shapes in hot weather conditions during the day, expressed by using a mathematical model of the Fourier function and daily dynamics of air temperature gradients on various land surfaces is influenced by the process of heat absorption and thermal emission processes from the soil in various lands.
PERBANDINGAN KARAKTERISTIK KARBON AKTIF ARANG TEMPURUNG KELAPA DAN ARANG TEMPURUNG KEMIRI MENGGUNAKAN SCANNING ELECTRON MICROSCOPIC DAN FOURIER TRANSFORM INFRA RED Lauri Leslie Mendame; Patricia Silangen; Alfrie Rampengan
Jurnal FisTa : Fisika dan Terapannya Vol 2 No 2 (2021): OKTOBER
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.v2i2.138

Abstract

Utilization of coconut shell and candlenut shell in Indonesia has not been used optimally as in North Sulawesi. The purpose of this research was to compare the characteristics of the pore size and functional groups of activated carbon, coconut shell charcoal and candlenut shell charcoal. The research method includes the activation stage and characterization of activated carbon using Scanning Electron Microscopic (SEM) and Fourier Transform Infra Red (FTIR). The results of this study are the characteristics of coconut shell charcoal activated carbon which has a larger pore size of 31.5 µm - 41.9 µm when compared to candlenut shell charcoal activated carbon which has a small pore size, namely 23.0 µm - 33.1 µm. . Both of these activated carbons have the same functional group, namely O-H, C=C, C-O, C-H which is an activated carbon composition.
Studi Struktur Mikro dan Jenis Mineral Batuan Tanah Beruap di Gunung Soputan Minahasa Jonathan J. Wuisan; Donny R. Wenas; Alfrie M. Rampengan; Cyrke A. N. Bujung
Jurnal FisTa : Fisika dan Terapannya Vol 3 No 2 (2022): OKTOBER
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.v3i2.209

Abstract

Geothermal is one of the natural resources that has great potential to be used as a renewable energy. The existence of geothermal sources is characterized by the presence of geothermal manifestations that appear on the earth's surface. North Sulawesi Province is one of the areas that have alteration rocks that are commonly found in geothermal manifestation areas. The purpose of this study was to determine the elemental composition and types of minerals in steaming ground at Mount Soputan in Minahasa, North Sulawesi Province. The method used is the electron beam method on SEM, and the energy dispersive X-ray spectroscopic method and FTIR spectroscopy. The results obtained indicate that the elemental composition of the steaming ground in Mount Soputan in Minahasa, North Sulawesi Province is Al, Si, and Fe with the percentage content of Al 8.53 percent, Si 87.13 percent, and Fe 4.34 percent. Types of rock minerals on the steaming ground at Mount Soputan, Minahasa Regency obtained quartz and magnetite minerals, which are dominated by quartz.
Studi Kimia Fisik Fluida pada Manifestasi Panas Bumi Danau Linow Vincensius Jamlean; Cyrke A. N. Bujung; Alfrie M. Rampengan
Jurnal FisTa : Fisika dan Terapannya Vol 3 No 2 (2022): OKTOBER
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.v3i2.211

Abstract

Lake Linow is one of the volcanic lakes that has geothermal activity characterized by geothermal manifestations in the form of hot springs that appear on the surface. The purpose of this research is to study the type of fluid and estimate the reservoir temperature. The methods used in this research are ion analysis of fluid content using spectrometry, pH, and physical analysis of fluids in the form of physical appearance manifestations of hot springs. The results showed that the hot springs in Lake Linow are immature water types with a high percentage of Mg concentration. It is interpreted that there is a process of dilution with other elements and mixing with meteoric water which is rich in Mg elements. Calculations using water geothermometer equations on hot spring samples in the area are estimated to have a reservoir temperature of 92.85°C-127.9°C
Pembuatan Karbon Aktif Bambu dengan Metode Termolisis dan Karakterisasinya Stefan Sindim; Heindrich Taunaumang; Alfrie Musa Rampengan
Jurnal FisTa : Fisika dan Terapannya Vol 4 No 2 (2023): OKTOBER
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.v4i2.285

Abstract

This study aims to determine the manufacture of bamboo activated carbon by the thermolysis method and to know how to characterize bamboo activated carbon after being activated by the thermolysis method and using an activating agent. The method used in this research is the experimental method. Bamboo is carbonized at 350°-400°C and immersed in a 20% phosphoric acid solution. Activated carbon was characterized by Fourier Transform InfraRed spectroscopy (FTIR), X-Ray Diffraction (XRD), and Scanning Electron Microsope-Energy Dispersive X-ray spectrometric (SEM-EDX). Characterization with XRD showed that the 2θ angle of the bamboo carbon after activation was 24°, 37.5°, and 44°. Characterization with FTIR showed that the functional groups detected on activated carbon were O-H, C-H alkane groups, C=O, C=C, C-C , and C-O. Characterization by SEM showed that the activated carbon from the shoots had a neat looking surface. EDX analysis showed that the elemental content of carbon electrodes colored by carbon elements was 78.38%.
Pemodelan Percepatan Tanah sebagai Parameter Hazard Gempabumi menggunakan Metode Deterministic Seismic Hazard Analysis di Kota Manado Lorensia Kainde; Cosmas Poluakan; Alfrie Musa Rampengan; Muhammad Zulkifli
Jurnal FisTa : Fisika dan Terapannya Vol 4 No 2 (2023): OKTOBER
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.v4i2.286

Abstract

Research has been carried out on modeling ground acceleration as an earthquake hazard parameter in Manado. This study aims to create an earthquake modeling scenario using Deterministic Seismic Hazard Analysis to determine the estimated PGA value and the intensity value of a significant earthquake. This study utilizes the BMKG SHAKEMAP software to determine the PGA value which is then converted into a modified Mercalli intensity value. A total of 13 modeling scenarios were built in this study. The results show that the scenario of significant earthquake modeling in Manado City and its surroundings using the 2018 BMKG catalog input shows varying results. This depends on the earthquake source parameters as well as the distance from the source to the site. Scenario model 10 is the most representative because it has the same intensity value as the June 20, 1991 earthquake. The resulting PGA value shows the area that has the highest PGA in Manado comes from the 3rd model (8.1% g) and the lowest from the model to 12 (1.4 % g). Due to the limited historical intensity data from the catalog, only 8 models out of 13 models were tested for root mean square error verification ranging values from 0 to 0.25.
Studi Struktur Mikro dan Jenis Mineral Batuan Mata Air Panas menggunakan SEM-EDX dan FTIR di Kelurahan Woloan Satu Utara Kota Tomohon Geraldi Saputera Kapoh; Donny Royke Wenas; Alfrie Musa Rampengan
Jurnal FisTa : Fisika dan Terapannya Vol 4 No 2 (2023): OKTOBER
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.v4i2.289

Abstract

Volcanoes around area there are usually geothermal manifestations, one of which is the hot springs manifestations in North Woloan Satu Tomohon City. The purpose of this study was to determine the microstructure and elemental composition of rocks as well as the types of rock minerals in the manifestation of hot springs in Woloan Satu Utara, Tomohon City, North Sulawesi Province. The research was carried out by analyzing the rock samples using SEM-EDX and FTIR. The results showed that the elemental composition of the rock 1 is O, Si, and Al with content percentage O 35,76%, Si 58,57%, and Al 5,67% and elemental composition of the rock 2 is O and Si with content percentage O 47,68% and Si 52,32%. From the results of FTIR characterization, for the rock 1 were obtained mineral types is Quartz (SiO2) and Kaolinite (2H2O Al2O3 2SiO2). And for the rock 2 were obtained mineral types is Quartz.
Penggunaan Aplikasi Tinkercad dalam Pembelajaran Elektronika Dasar 2: Persepsi dan Pemahaman Konseptual Mahasiswa Ishak Pawarangan; Alfrie Musa Rampengan; Jeane V. Tumangkeng; Silka Silka
SCIENING : Science Learning Journal Vol. 5 No. 1: Juni 2024
Publisher : Jurusan Pendidikan IPA FMIPA Universitas Negeri Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Elektronika Dasar 2 adalah salah satu mata kuliah wajib jurusan Fisika, Universitas Negeri Manado dan umumnya juga dibeberapa perguruan tinggi lain. Penelitian ini menyelidiki penggunaan aplikasi Tinkercad dalam mata kuliah Elektronika Dasar 2 dan dampaknya terhadap persepsi serta pemahaman mahasiswa. Jenis penelitian yang digunakan yaitu kajian deskriptif dengan dengan metode survei terhadap mahasiswa Jurusan Fisika, Universitas Negeri Manado yang mengambil mata kuliah Elektronika Dasar 2 sebanyak 20 orang. Data dikumpulkan melalui kuesioner berbasis google form dan tanya untuk mendapatkan pemahaman yang lebih mendalam mengenai pengalaman belajar menggunakan Tinkercad dan pemahaman mahasiswa terkait materi ajar. Hasil penelitian menunjukkan bahwa penggunaan Tinkercad memiliki pengaruh positif terhadap persepsi, memberikan media pembelajaran yang lebih visual dan interaktif dan membantu mahasiswa memahami konsep-konsep elektronika secara lebih baik. Meskipun begitu, penelitian ini juga mengidentifikasi beberapa tantangan yang dihadapi oleh mahasiswa, seperti masalah aksesibilitas dan kebutuhan akan panduan penggunaan aplikasi. Mahasiswa memberikan persepsi positif sekaligus telah dapat meningkatkan pemahaman konseptual terkait penggunaan aplikasi Tinkercad dalam pembelajaran Elektronika Dasar 2.
Co-Authors Angelika Kristi Nilahi Arik S. Nugroho Armando Ariakta Aloanis Awal Mulia Rejeki Tumanggor Byancha Priscilla Christophil Medellu Cosmas Poluakan Cyrke A N Bujung Dewi, Adiadna Chitra Donny Royke Wenas Edi Suharyadi Erixio Mewoh Farly Reynol Tumimomor Frindi L Morontong Geraldi Saputera Kapoh Givraldi Kumentas Heindrich Taunaumang Heru, Christine I Wayan Rikiawan Ishak Pawarangan Iwan Sixtus Umboh Jeane V. Tumangkeng Jeferson Polii Jeilen Gabriela Nikita Nusa Jonathan J. Wuisan Jutisya Putrih Senaen Kapantow, Khariezmathika Ester Kimbal, Ariel Javi Kristanto Gunawan Kumonong Lahope, Kenny Setiawan Lauri Leslie Mendame Lolowang , Jimmy Lombo, Riris Liliana Lorensia Kainde Mahulae, Parno Sumanro Marianus Ma’arif - Muhammad Zulkifli Paembonan, Tiara Lestari Parno Sumanro Mahulae Patricia Mardiana Silangen Rende, Jeane Cornelda Rizqie Emeninta Putri Rolles Nixon Palilingan Rondonuwu, Anneke T Salti, Oktavia Indri Satoshi Iwata Satyano W Mongan Seveny Nuzully silka Silka Silka Sindim, Excelcis Deo Christianto Stefan Sindim Takeshi Kato Tamara, Gersom Jeremia Tengker, Soenandar Millian Tompunu Tineke Makahinda Treesje K. Londa Tumimomor, Farly R. Varisky Abraham Dumanaw Vicky Mawuntu Vincensius Jamlean Watulingas, Aldo Nandito