Article Per Year (5 Year)
p-Index From 2021 - 2026
1.829
P-Index
This Author published in this journals
All Journal International Journal of Advances in Applied Sciences Jurnal MIPA PHARMACON Journal of Mathematical and Fundamental Sciences JURNAL LPPM BIDANG SAINS DAN TEKNOLOGI Indonesian Physical Review The Studies of Social Sciences PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Jurnal Natural Scientiae
Gerald Tamuntuan
Jurusan Fisika FMIPA Universitas Sam Ratulangi, Jl. Kampus Unsrat, Manado - 95114
Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Environmental Science Immunology & microbiology Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Physics Social Sciences Other

Published : 16 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 16 Documents
Search

 1   2 
Edukasi Mitigasi Bencana Hidrometeorologis Bagi Masyarakat Terdampak Banjir di Kelurahan Tumumpa Satu dan Tumumpa Dua Pandara, Dolfie P; Ferdy, Ferdy; Bobanto, Maria D; Tamuntuan, Gerald H; Kolibu, Hesky S; Mosey, Handy I R; Ponumbol, Yuki; Unso, Kristina
The Studies of Social Sciences Vol. 5 No. 2 (2023): The Studies of Social Sciences
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35801/tsss.v5i2.51608

Abstract

Bencana banjir adalah bencana hidrometeorologis yang sering melanda Indonesia termasuk Kota Manado. Potensi banjir dan tingkat kerentanan resiko banjir di beberapa wilayah Kota Manado cukup tinggi seperti di Kelurahan Tumumpa Satu dan Tumumpa Dua. Kegiatan PKM ini dilakukan untuk memperkuat pemahaman mitigasi banjir dari aparat kelurahan dan kader masyakarat sehingga memiliki kemampuan untuk memberi edukasi kepada masyarakat lainnya dan menjadi penggerak dalam upaya-upaya mitigasi banjir. Edukasi diberikan dalam kegiatan PKM ini melalui sosialisasi dan diskusi (FGD: focus group discussion). Materi sosialisasi dan FGD meliputi aspek-aspek hidrometeorologis, kondisi faktual bencana banjir Kota Manado, mitigasi dan manajemen bencana banjir, sistem peringatan dini, dan kampung tangguh bencana. Tingkat ketercapaian pelaksanaan sosialisasi dan FGD diukur dari lima aspek mitigasi bencana banjir meliputi perencanaan penanggulangan bencana, pengurangan resiko bencana, persyaratan analisis resiko bencana, persyaratan analisis resiko bencana, dan edukasi melalui pendidikan dan pelatihan. Hasil PKM menunjukkan bahwa persepsi perangkat kelurahan, kepala-kepala lingkungan dan kader masyarakat tentang mitigasi bencana sangat baik. Hasil ini menunjukkan adanya kesiapan dalam menghadapi bencana banjir. Kegiatan PKM ini merekomendasikan perlu dikembangkannya sistem peringatan dini berbasis IOT di DAS Bailang, penegakkan aturan tata ruang secara bijaksana dan penggalakkan pembuatan biopori di pekarangan warga.
Pemetaan Bawah Permukaan Melalui Pemodelan 3D Data Geolistrik Resistivitas Daerah Pra TPA Ilo-Ilo Endekan, Ririn Amma; Tamuntuan, Gerald Hendrik; Tongkukut, Seni H. J.; As'ari
JURNAL LPPM BIDANG SAINS DAN TEKNOLOGI Vol. 8 No. 2 (2023): JLPPM SAINTEK 8(2), 2023
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35801/jlppmsains.8.2.2023.48972

Abstract

Telah dilakukan penelitian untuk memvisualisasikan dan memperkirakan kondisi bawah permukaan di daerah lahan pembangunan TPA kawasan Ilo-Ilo Kecamatan Wori Kabupaten Minahasa Utara. Data sekunder resistivitas hasil pengukuran metode geolistrik konfigurasi Wenner-Alpha yang sudah diinversi menggunakan software Res2dinv dimasukkan pada software voxler yang menghasilkan bentuk visual kondisi bawah permukaan didaerah lahan pembangunan TPA kawasan Ilo-Ilo dalam bentuk 3 dimensi. Diperoleh hasil bahwa dalam pemodelan secara 3 dimensi teridentifikasi keberadaan tiga potensi akuifer dengan nilai resistivitas ≤15 Ωm. Keberadaan akuifer pertama dan akuifer kedua berada pada kedalaman 10 hingga 65 meter dan akuifer ketiga terletak pada kedalaman 10-30 meter, dengan jumlah volume total ketiga akuifer sebesar 156.013,8m³.
PEMODELAN PENJALARAN GELOMBANG TSUNAMI DAN INUNDASI DI DAERAH BOLAANG MONGONDOW SELATAN SEBAGAI AKIBAT GEMPA PADA ZONA SELATAN SUBDUKSI GANDA LAUT MALUKU (STUDI KASUS : DESA SALONGO DAN DESA PINOLOSIAN) Popoji, Risnawati M.; Tamuntuan, Gerald Hendrik; Pasau, Guntur
JURNAL LPPM BIDANG SAINS DAN TEKNOLOGI Vol. 9 No. 2 (2024): JLPPM SAINTEK
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35801/jlppmsains.9.2.2024.56994

Abstract

Abstrak Telah dilakukan penelitian untuk mengestimasikan waktu penjalaran gelombang tsunami dan tinggi gelombang tsunami serta pembuatan peta penjalaran gelombang tsunami yang dapat menerjang Desa Salongo dan Desa Pinolosian dengan menggunakan software TUNAMI-N2. Simulasi menggunakan skenario gempabumi yang berkekuatan pada 2 lokasi penelitian dengan titik koordinat Desa Salongo dan dan Desa Pinolosian dan diberikan 4 titik pengamatan atau tide gauge pada setiap lokasi penelitian untuk mendapatkan waktu penjalaran dan tinggi gelombang tsunami. Hasilnya menunjukkan bahwa tsunami dengan perkiraan kekuatan gempabumi pada lokasi penelitian memiliki ketinggian maksimum penjalaran gelombang tsunami mencapai ketinggian 0,74 m pada Desa Salongo yang di kategorikan rendah dan ketinggian 1,15 m pada Desa Pinolosian di kategorikan sedang. Kata kunci: Gelombang Tsunami, Inundasi, TUNAMI-N2.
Carbonized mangrove wood as photothermal material for solar water desalination Pandara, Dolfie Paulus; Unso, Kristina; Bobanto, Maria Daurina; Tamuntuan, Gerald Hendrik; Angmalisang, Ping Astony; Ferdy, Ferdy; Tiwow, Vistarani Arini; Kumaunang, Maureen
International Journal of Advances in Applied Sciences Vol 14, No 2: June 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijaas.v14.i2.pp542-551

Abstract

The investigation into the physical properties of carbonized mangrove wood (CMW) is essential for its development as an efficient solar heat absorber. This study explores the physical characteristics of CMW and its potential application in solar desalination. Initially, the mangrove wood was cleaned with running water, followed by ultrasonication at a frequency of 42 kHz in 96% ethanol for 5 minutes, and then heated at 125 °C for 2 hours. The carbonization process was conducted in a furnace for 1 hour at temperatures of 400, 500, and 600 °C. The physical properties of CMW were analyzed using an X-ray diffractometer (XRD), Fourier transform infrared spectroscopy (FTIR), energy dispersive spectroscopy, and scanning electron microscopy (SEM). The findings revealed the formation of a carbon structure at 2 theta angles of approximately 24.08, 23.26, and 23.16°, with carbon contents of 45.05, 36.86, and 39.37%, respectively. CMW was identified as a porous material, making it highly effective for sunlight absorption in seawater evaporation. The hydroxyl content within the CMW structure enhanced its water evaporation capabilities. In experimental investigations aimed at desalinating seawater, a 300-watt halogen lamp was positioned 15 centimeters above the CMW's surface, resulting in an evaporation rate of 5.33 kg.m-2.h-1. CMW shows significant promise as a solar evaporator.
ASSESSING CISANTI LAKE SEDIMENTS AS ENVIRONMENTAL QUALITY INDICATORS IN THE UPSTREAM OF THE CITARUM RIVER Fitriani, Dini; Agustine, Eleonora; Hajar Kirana, Kartika; Meliani, Tiara Ayu; Rofifah, Sinthia Anis; Chicilia, Novia; Muhammad, Irfan Handi; Rostika Noviyanti, Atiek; Tamuntuan, Gerald Hendrik
Indonesian Physical Review Vol. 8 No. 3 (2025)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v8i3.490

Abstract

Environmental conditions in aquatic ecosystems could change due to the entry of additional materials, such as heavy metals and magnetic minerals. These materials, referred to as anthropogenic materials, could be derived from human activities. The presence of the materials could affect the magnetic properties and heavy metals content of river water and sediments. We have analyzed magnetic susceptibility and heavy metal concentration in sediments collected from Cisanti Lake. Cisanti Lake is known as “zero kilometers” of the Citarum River. Using the level of heavy metals in sediments, we calculated and evaluated pollution indices in the form of Contamination Factor (CF), Geoaccumulation Index (Igeo), and Pollution Load Index (PLI). The results showed that the magnetic susceptibility of sediments (𝜒𝐿𝐹) was in the range of 317.2 - 2274.9 (× 10-8) m3kg-1, inferring the dominance of ferrimagnetic minerals in sediments. Based on bivariate analysis of 𝜒𝐿𝐹 and the calculated frequency-dependent magnetic susceptibility or cFD (%), domain states of magnetic minerals are clustered at stable single domain (SSD)/multidomain (MD). Pollution indices of CF and Igeo showed that all sample points were contaminated by Cu at a considerable level.  Moderate to significant contamination occurred in the studied area according to the PLI analysis. The positive strong correlation between 𝜒𝐿𝐹 and PLI suggests that magnetic susceptibility serves as a proxy indicator of contamination. 
Green conversion of red snapper fish scale-derived carbon dots and its absorption properties for solar thermal desalination Pandara, Dolfie Paulus; Tamuntuan, Gerald Hendrik; Bobanto, Maria Daurina; Ferdy, Ferdy
International Journal of Advances in Applied Sciences Vol 13, No 1: March 2024
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijaas.v13.i1.pp84-92

Abstract

Fisheries wastes have been used as precursors for the synthesis of carbon dots (CDs). These wastes are often converted using hydrothermal methods which require high temperature and pressure, leading to high production costs, especially for large-scale production. This study aims to innovate a low-cost synthesis method with the potential for large-scale production. Green conversion of CDs from red snapper fish scale waste was carried out using a combination of immersion method and ultrasonic wave treatment. The results showed that the products had an absorption peak at a wavelength of 404 nm and an energy bandgap of 2.7 eV. Excitation at 404 nm was associated with non-bonding n orbital to antibonding orbital ?* electronic transitions due to the presence of free electron pairs and related with carbon-nitrogen (C-N) bonds. The 2.7 eV energy bandgap was associated with the state of amine groups containing free electron pairs located on the surface of CDs as well as blue light emission at a wavelength of 460 nm when CDs were illuminated with ultraviolet light. Red snapper fish scale-derived CDs showed fluorescence characteristics and the presence of nitrogen elements, making them potential photothermal materials for solar-powered seawater desalination processes.
Co-Authors -, Ferdy Abidjulu, Gilbert Angmalisang, Ping Astony Arikalang, Gregorio As'ari As'Ari As'Ari As'ari, As'ari Atiek Rostika Noviyanti Bobanto, Maria D Bobanto, Maria D. Chicilia, Novia Dini Fitriani, Dini Edy Gaffar Eleonora Agustine Endekan, Ririn Amma Estevanus Kristian Huliselan Ferdy . Friska Datunsolang Gani, Sintia N. Guntur Pasau Hajar Kirana, Kartika Hanny F. Sangian Hesky S Kolibu, Hesky S Hesky Stevy Kolibu James Russell Kaindeh, Gloria R la Ode Safiuddin Mans Mananohas, Mans Maramis, Clarita Maureen Kumaunang Meilan Demulawa Meliani, Tiara Ayu Mosey, Handy I R Muhammad, Irfan Handi Nono’o, Sandra Pandara, Dolfie Paulus Pani, Sutaryono Ponumbol, Yuki Popoji, Risnawati M. Rawung, Novena Rofifah, Sinthia Anis Sagai, Fingken Stevanus Satria Bijaksana Seni H. J. Tongkukut Supu, Idawati Telleng, R Tongkukut, Seni H Tongkukut, Seni Herlina Juita Unso, Kristina Vistarani Arini Tiwow