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All Journal Fullerene Journal of Chemistry SOSCIED Studies in Learning and Teaching Sciening : Science Learning Journal Charm Sains : Jurnal Pendidikan Fisika Jurnal FisTa : Fisika dan Terapannya
Vicky Mawuntu
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Astronomy Chemistry Education Electrical & Electronics Engineering Energy Environmental Science Materials Science & Nanotechnology Physics Social Sciences Other

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FABRIKASI ARANG AKTIF TEMPURUNG KELAPA, ARANG AKTIF ALEURITES MOLUCCANA DAN KARAKTERISASINYA Alfrie Rampengan; Vicky Mawuntu
Jurnal Kimia Fullerene Vol 7 No 2 (2022): Fullerene Journal of Chemistry
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37033/fjc.v7i2.516

Abstract

Utilization of coconut and candlenut plants in Indonesia is still limited to the utilization of the fruit flesh, so that the waste resulting from the use of coconuts, namely the shell, has not been utilized optimally, especially in North Sulawesi. The aim of this study was to look at the functional groups in the activated carbon of coconut shell charcoal and aleirites moluccana (pecan shell) charcoal using Fourier Transform Infra Red (FTIR). The results of this study showed that the activated carbon of coconut shell charcoal and aleirites moluccana (pecan shell) charcoal had functional groups O-H, C=C, C-O, C-H. This group is an arrangement that belongs to an activated carbon.
Development of Thermodynamics Learning With Empirical Approach and Portfolio Assessment Techniques Tineke Makahinda; Vicky Julius Mawuntu
Studies in Learning and Teaching Vol. 4 No. 2 (2023): August
Publisher : Indonesia Approach Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46627/silet.v4i2.263

Abstract

Students face numerous challenges in comprehending thermodynamics concepts and principles. The empirical approach and portfolio assessment technique were used to encourage educators to determine good teaching strategies and motivate students. The purpose of carrying out this research was to develop thermodynamics teaching materials with an empirical approach and portfolio assessment techniques. This research uses a mix method, namely qualitative and quantitative with development research using the Borg and Gall models. This research was conducted on students majoring in Physics Education. Based on the validation results of material experts 91.9% and media expert validation 80.9% that this teaching material is feasible to use. The results of the one-party t-test were given treatment in the learning process, namely an empirical approach with a portfolio assessment technique. Then given a posttest or final test as evaluation material. The data obtained was then processed to test descriptive research data, data normality, hypothesis testing and N-Gain testing with the help of SPSS 22.0 for windows. With an average result 47.25 of pretest and 81.25 of posttest. The N-Gain results are in the medium and high categories and the average result is 0.64 which shows an increase in student results in thermodynamics courses. Students can get information through direct experience, making what they learn more tangible and learning more meaningful and exciting since it helps them to think critically.
Validasi Teorema Geometri pada kasus Titik Berat Segitiga secara Induktif Menggunakan Komputasi Simbolik Vicky Julius Mawuntu
Jurnal FisTa : Fisika dan Terapannya Vol 4 No 1 (2023): 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.v4i1.236

Abstract

Symbolic computing emphasizes the exact processing of data representations. The exact representative states that even though the output is small, the data generated using processing can produce larger mathematical expressions. To overcome this problem, a method needs to be used in representing data. This process is carried out to solve a physical problem in the case of the center of gravity on a triangle. Symbolic programming languages can convert rational numbers, so that this symbolic processing can be applied to inductively validate geometric theorems in the case of triangular center.
Identifikasi Prinsip Fisika Pada Rumah Adat Minahasa di Woloan Untuk Pembelajaran Fisika Ishak Pawarangan; Jeilen Gabriela Nikita Nusa; Vicky Julius Mawuntu; Bergita Gela Saka; Wilson Jefriyanto
SCIENING : Science Learning Journal Vol. 4 No. 2: Desember 2023
Publisher : Jurusan Pendidikan IPA FMIPA Universitas Negeri Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53682/slj.v4i2.7955

Abstract

Rumah adat termasuk rumah adat Minahasa di Woloan adalah bagian dari warisan budaya. Rumah adat ini memiliki perpaduan unik antara kearifan lokal dan penerapan prinsip-prinsip fisika pada struktur bangunannya. Penelitian ini bertujuan untuk mengidentifikasi prinsip-prinsip fisika yang terdapat dalam konstruksi Rumah Adat Minahasa di Woloan sebagai salah satu sumber alternatif pembelajaran fisika. Metode penelitian ini menggunakan kajian literatur dan observasi langsung untuk mengeksplorasi keterkaitan antara konsep fisika dengan konstruksi Rumah Adat Minahasa dengan jenis penelitian yaitu kualitatif deskriktif. Analisis dilakukan terhadap data yang dikumpulkan untuk memperoleh pemahaman tentang bagaimana prinsip-prinsip fisika dapat diintegrasikan ke dalam pembelajaran fisika yang terdapat pada rumah adat. Hasil penelitian menunjukkan bahwa terdapat prinsip fisika pada rumah adat di Woloan seperti prinsip gaya, kesetimbangan benda tegar dan kalor. Hasil penelitian ini menunjukkan bahwa rumah adat Minahasa di Woloan dapat dijadikan sebagai sumber pembelajaran fisika yang diharapkan dapat menjadi landasan untuk pengembangan materi pembelajaran fisika yang kontekstual dan berbasis kearifan lokal yang juga merupakan upaya untuk memperkaya pengetahuan dan melestarikan warisan budaya bangsa.
PENGARUH KONSENTRASI MOLARITAS KOH TERHADAP SIFAT KELISTRIKAN BIO BATERAI AMPAS KOPI Pawarangan, Ishak; Tumewu, Widya Anjelia; Mawuntu, Vicky Julius; Kumendong, Igreya Mitchel; Pungus, Sayenne Givenshe
SOSCIED Vol 7 No 2 (2024): SOSCIED - November 2024
Publisher : LPPM Politeknik Saint Paul Sorong

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32531/jsoscied.v7i2.891

Abstract

Spent coffee grounds are an abundant organic waste material. Spent coffee grounds have significant potential as an environmentally friendly alternative energy source in bio-battery technology. This study aims to analyze the effect of KOH molarity concentration on the electrical properties of coffee ground-based bio-batteries. Variations in KOH molarity solutions of 1M, 3M, and 5M, each mixed with 50 grams of spent coffee grounds, were utilized to evaluate their effect on the electrical properties, including current, voltage, and power output. The results indicate that increasing the molarity concentration significantly enhances the bio-battery's performance, as evidenced by increased voltage and maximum power output. The highest electrical power output, 97.2 mW, was achieved at a 5M KOH concentration. The study concludes that selecting the appropriate molarity concentration is a key factor in optimizing the performance of coffee ground-based bio-batteries. This research contributes to the advancement of renewable energy development from organic waste.
PERSEPSI SISWA TERHADAP PENGGUNAAN MODUL PRAKTIKUM BIO BATERAI DALAM PEMBELAJARAN FISIKA SMA MATERI ENERGI TERBARUKAN Pawarangan, Ishak; Tumewu, Widya Anjelia; Mawuntu, Vicky Julius; Kumendong, Igreya Mitchell
Charm Sains: Jurnal Pendidikan Fisika Vol 5 No 3 (2024): OKTOBER
Publisher : Program Studi Pendidikan Fisika Jurusan Fisika Fakultas Matematika, Ilmu Pengetahuan Alam, dan Kebumian (FMIPAK), Universitas Negeri Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53682/charmsains.v5i3.402

Abstract

This study aims to examine students' perceptions of the use of a bio-battery practicum module utilizing coffee grounds in physics education on the topic of renewable energy. The research involved 12 students from SMA Negeri 2 Tomohon as participants. The evaluation instrument consisted of a questionnaire with 11 questions grouped into three primary indicators: module appearance, material presentation, and module benefits. The findings revealed that the module appearance indicator was rated as excellent on three questions (100%, 83.33%, and 100%) and good on one question (66.67%). The material presentation indicator received excellent ratings across all questions, ranging from 83.33% to 100%. Similarly, the module benefits indicator achieved excellent ratings for all questions (100%). Despite these positive results, a few neutral responses were observed on questions concerning the module’s design and illustrations (33.33% and 16.67%) and material clarity (16.67%). Overall, the module demonstrated a high level of effectiveness, with the majority of scores exceeding 76%, placing it in the "excellent" category. These results underscore the significant potential of the bio-battery practicum module as an innovative educational tool to enhance students' understanding of renewable energy concepts at the high school level.
Co-Authors Alfrie Musa Rampengan Bergita Gela Saka Ishak Pawarangan Jeilen Gabriela Nikita Nusa Kumendong, Igreya Mitchel Kumendong, Igreya Mitchell Pungus, Sayenne Givenshe Tineke Makahinda Widya Anjelia Tumewu Wilson Jefriyanto