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Alfrie Musa Rampengan
Universitas Negeri Manado
Agriculture, Biological Sciences & Forestry 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

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Analisis Keberadaan Manifestasi Panas Bumi Terhadap Keseimbangan Lingkungan Sekitar Desa Talawaan Bantik Angelika Kristi Nilahi; Cyrke Adfie Netty Bujung; Jeilen Gabriela Nikita Nusa; Alfrie Musa Rampengan
Jurnal FisTa : Fisika dan Terapannya Vol 5 No 2 (2024): 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.v5i2.356

Abstract

Energy is very important for humans, apart from that the environment also has the same important role, in other words energy and the environment are inseparably linked. This research aims to see the differences in the chemical content and physical properties of geothermal manifestation water and residents’ well water, as well as to find outh whether the manifestation water content affects local residents’ well water. The research samples consisted of hot springs and local well water, where the physical and chemical properties observed were: Temperature, pH, DHL, CL, Fe, H2S,SO4. The results of measurement and sample testing obtained were then analyzed descriptively. The result obtained from this research are that for the physical properties and chemical content of Cl, Fe, H2S, and SO4 there is not much difference in the content analysis results, while for the DHL, Temperature and pH values there are quite large differences, but still is below the standard value for clen water quality.
KARAKTERISTIK KARBON AKTIF BERBASIS LIMBAH PELEPAH KELAPA DENGAN VARIASI KONSENTRASI KOH SEBAGAI MATERIAL ELEKTRODA SUPERKAPASITOR Kimbal, Ariel Javi; Taunaumang, Heindrich; Tumimomor, Farly R.; Rampengan, Alfrie M.; Pawarangan, Ishak
SOSCIED Vol 8 No 1 (2025): SOSCIED - Juli 2025
Publisher : LPPM Politeknik Saint Paul Sorong

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32531/jsoscied.v8i1.913

Abstract

The current energy needs are increasing due to technological advances and the increasing number of technology users. So, to solve this problem, it is necessary to make major changes and energy renewal by using alternative energy. One of the utilization of alternative energy is energy storage devices such as supercapacitors. In this study, a test was carried out on the activation of coconut stem waste as a supercapacitor electrode with variations in KOH electrolyte, namely 6M, 7M, 8M which produced voltages of 1.254 V, 1.187 V, 1.105 V and produced currents of 87.2 mA, 46.52 mA, 25.38 mA respectively. Based on the results of the study, it showed a decrease in the concentration of electrolytes 6M, 7M, 8M. So it can be concluded that different electrolytes have a significant effect on the voltage and electric current values ​​produced by the supercapacitor electrodes.
IMPLEMENTASI MODEL PEMBELAJARAN KOOPERATIF TIPE TWO STAY TWO STRAY (TSTS) PADA MATERI SUHU DAN KALOR UNTUK MENINGKATKAN HASIL BELAJAR SISWA DI SMA NEGERI 2 TONDANO Lombo, Riris Liliana; Marianus; Rampengan, Alfrie Musa; Rende, Jeane Cornelda; Mahulae, Parno Sumanro
Charm Sains: Jurnal Pendidikan Fisika Vol 6 No 3 (2025): OKTOBER
Publisher : Program Studi Pendidikan Fisika Jurusan Fisika Fakultas Matematika, Ilmu Pengetahuan Alam, dan Kebumian (FMIPAK), Universitas Negeri Manado

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Abstract

The Two Stay Two Stray (TSTS) cooperative learning model is an approach that focuses on active interaction between students through discussion activities and information exchange between groups. This study was conducted with the aim of determining the effect of the TSTS model on the learning outcomes of students at Tondano 2Public High School on the subject of temperature and heat. The method applied in this study was a quasi-experiment with a non-equivalent pretest-posttest control group design,involving two classes, namely the experimental class and the controlclass. In the experimental class, the pretest results showed an average of 34 and increased to 83.05 in the posttest, while the control class experienced an increase from an average of 33.52 to 73.81. Furthermore, a statistical analysis in the form of an independent t-test was conducted, which yielded a sig. value of 0.0002 (<0.05), indicating that there was a significant difference in learning outcomes between the two groups. The application of the TSTS cooperative learning model proved to be effective in improving learning outcomes because it encouraged students to be more active, responsible, and directly participate in learning activities. From these results, it can be concluded that the application of the TSTS cooperative learning model has a positive effect on improving student learning outcomes on the topic of temperature and heat.
Penggunaan Aplikasi Tinkercad dalam Pembelajaran Elektronika Dasar 2: Persepsi dan Pemahaman Konseptual Mahasiswa Pawarangan, Ishak; Rampengan, Alfrie Musa; Tumangkeng, Jeane V.; Silka, Silka
SCIENING : Science Learning Journal Vol. 5 No. 1: Juni 2024
Publisher : Jurusan Pendidikan IPA FMIPAK Universitas Negeri Manado

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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.
Penggunaan Aplikasi Tinkercad dalam Pembelajaran Elektronika Dasar 2: Persepsi dan Pemahaman Konseptual Mahasiswa Pawarangan, Ishak; Rampengan, Alfrie Musa; Tumangkeng, Jeane V.; Silka, Silka
SCIENING : Science Learning Journal Vol. 5 No. 1: Juni 2024
Publisher : Jurusan Pendidikan IPA FMIPAK 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< em> 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 < p>
Karakterisasi Gugus Fungsi Arang Aktif Sabut Kelapa dengan Metode Pirolisis Talubun, Anthoni; Taunaumang, Heindrich; Rampengan, Alfrie Musa
Jurnal FisTa Fisika dan Terapannya Vol 7 No 1 (2026): APRIL
Publisher : Fakultas Matematika Ilmu Pengetahuan Alam dan Kebumian, Universitas Negeri Manado

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Abstract

Activated charcoal can be produced from carbon-containing materials or from activated charcoal to get a wider surface area. Coconut coir is a part of coconut waste that is rarely forgiven. The researcher discussed the functional groups of activated charcoal from coconut coir with 10 ml of KOH activator. The purpose of this study was to determine the active charcoal content contained in coconut coir. The method used is the pyrolysis method in which combustion occurs in a furnace without oxygen at a temperature of 4000C. The analysis carried out by the researchers included a wave number spectrum analysis using the FTIR tool for coconut coir activated carbon. The identification results using the FTIR spectrophotometer showed that the activated charcoal in this study contained functional groups O-H, -O-, C-O, C=C, C-H
Effectiveness of Project Based Learning Model in Learning Evaluation Course in Physics Education Study Programme Parno Sumanro Mahulae; Tineke Makahinda; Patricia Mardiana Silangen; Alfrie Musa Rampengan
Jurnal Penelitian Pendidikan IPA Vol 9 No SpecialIssue (2023): UNRAM journals and research based on science education, science applic
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9iSpecialIssue.5891

Abstract

The use of project-based learning model in learning can improve the quality of learning and students' learning outcomes. The purpose of this study was to determine how effective the project-based learning model is on learning outcomes.  The method used in this research is quasi-experiment with one group pretest-posttest design. This research instrument is in the form of a student learning outcomes test in the form of descriptions, from the test results the n-gain test is carried out. The results showed an increase in student learning outcomes with an average pretest score of 45.73 and an average posttest score of 82.08. The result of the n-gain analysis is 0.57 which shows a moderate effectiveness category. Therefore, learning evaluation courses using project-based learning models is effective on student learning outcomes
Pemanfaatan Karbon Aktif dari Limbah Kulit Pisang Kepok (Musa Paradisiaca L) sebagai Elektroda Superkapasitor Khariezmathika Ester Kapantow; Alfrie Musa Rampengan; Farly Reynol Tumimomor; Heindrich Taunaumang; Sixtus Iwan Umboh
Jurnal FisTa Fisika dan Terapannya Vol 6 No 2 (2025): OKTOBER
Publisher : Fakultas Matematika Ilmu Pengetahuan Alam dan Kebumian, Universitas Negeri Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.67006/fista.v6i2.473

Abstract

In recent years, attention to renewable energy has increased, especially in electrical energy. One of the emerging technologies in supporting electrical energy storage is supercapacitors. This study aims to determine the effect of variations in the concentration of KOH solution on the current and voltage characteristics produced by supercapacitor electrodes made from activated carbon from kepok banana peel waste (Musa Paradisiaca L). By using dehydration method 80°C, carbonization at 400°C, chemical activation with 5M, 6M, and 7M KOH solution, and physical activation at 750°C. The results showed that the concentration of KOH activator from 5M, 6M, to 7M increased the electric voltage to 0.641 V, 1.078 V, and 1.448 V and electric current to 10.3 mA, 11.6 mA, and 28.5 mA, respectively. However, the density and conductivity values showed different patterns, with density values of 1.2446 A/
Effect of Phosphoric Acid (H3PO4) Activation on the Preparation of Activated Carbon from Gymnostoma Rumphianum Wood Tengker, Soenandar Milian Tompunu; Lumingas, Pamela; Tuerah, Jeanne Maria; Jannah, Miftahul; Rampengan, Alfrie Musa
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 10, No 2 (2025): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v10i2.107623

Abstract

The utilization of Roya wood branches (RWB) as raw material for activated charcoal production has not yet been optimized in North Sulawesi, specifically in Wulauan Village, North Tondano District. This study aims to present the results of the analysis of the physical and chemical properties, X-Ray Diffraction (XRD), and Transmission Electron Microscope (TEM) of RWB-based activated charcoal. The production of activated charcoal was conducted in three stages: sample preparation, pyrolysis of RWB at a temperature of 365°C for approximately 3 hours, and activation of RWB charcoal using phosphoric acid (H₃PO₄) at concentrations of 1%, 2%, and 3% for 24 hours. The analysis of physical and chemical properties of both non-activated and H₃PO₄-activated RWB activated charcoal showed that the best quality was obtained at a 3% activator concentration, with a moisture content of 0.1683%, ash content of 2.3321%, volatile matter content (VMC) of 0.9429%, fixed carbon (FC) content of 96.7250%, and iodine adsorption capacity (IAC) of 10,535 mg/g, all of which meet the SNI 06-3037-1995 for activated charcoal. XRD analysis showed that non-activated RWB charcoal had three broad diffraction peaks in the ranges of 9–14°, 20–25°, and 35–50°, along with one sharp peak in the range of 25–30°. After activation with H₃PO₄, only three broad diffraction peaks were observed at 9–14°, 20–25°, and 35–50° for all three H₃PO₄ concentration variations.TEM analysis indicated that non-activated RWB charcoal had particle sizes ranging from 20–33 nm, while after activation with 1% H₃PO₄, the particle sizes ranged from 41–51 nm..
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 Farly Reynol Tumimomor Frindi L Morontong Geraldi Saputera Kapoh Givraldi Kumentas Heindrich Taunaumang Heindrich Taunaumang 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 Khariezmathika Ester Kapantow Kimbal, Ariel Javi Kristanto Gunawan Kumonong Lahope, Kenny Setiawan Lauri Leslie Mendame Lolowang , Jimmy Lombo, Riris Liliana Lorensia Kainde Lumingas, Pamela Mahulae, Parno Sumanro Marianus Ma’arif - Miftahul Jannah 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 Talubun, Anthoni Tamara, Gersom Jeremia Tengker, Soenandar Millian Tompunu Tineke Makahinda Treesje K. Londa Tuerah, Jeanne Maria Tumimomor, Farly R. Varisky Abraham Dumanaw Vicky Mawuntu Vincensius Jamlean Watulingas, Aldo Nandito