Vol 22, No 3 (2025)

Table of Contents

Articles

Design and electromagnetic simulation of rhombus-shaped split ring resonator metamaterials for telecommunication antenna applications
Saktioto Saktioto, Yan Fatma Rizwan, Yan Soerbakti, Ari Sulistyo Rini, Syamsudhuha Syamsudhuha, Sofia Anita
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179-184
Preparation and characterization of α-Fe2O3/TiO2 nanocomposite derived from Logas natural sand as photocatalyst for degradation of methylene blue
Muhammad Deri Noferdi, Erwin Amiruddin
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185-190
Illegal logging detection technology based on sound pressure level in mangrove forests in Meranti Islands Regency
Nurfi Hikma, Murazhaki Hendri, Deco Amanahsyah Sutardi, Ahsanul Maarif Aresty
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191-196
Effect of voltage variation on the performance of carbon electrode supercapacitor cell from saba banana bunch biomass
Bintang Pamungkas, Awitdrus Awitdrus
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197-206
Effect of variations in current collectors types on the performance of supercapacitor cell carbon electrode from biomass stalk of curly chili
Reny Hidayati, Awitdrus Awitdrus
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207-212
Electromagnetic characterization of diamond-shaped metamaterial structures using a 4×4 array at ultra-wideband frequencies
Defrianto Defrianto, Erwin Kurnia, Saktioto Saktioto, Tengku Emrinaldi, Feby Nur Sakinah, M Ikhsan, Yan Soerbakti
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213-220
Biomass-derived activated carbon from acacia pods as a green electrode material for supercapacitors
Nadja Melika Putri, Nursyafni Nursyafni, Apriwandi Apriwandi, Vira Friska, Pharada Kresna, Julnaidi Julnaidi, Muhammad Nasir, Minarni Shiddiq, Erwin Amiruddin, Awaludin Martin, Rika Taslim, Erman Taer
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221-226
Manufacturing of supercapacitor carbon electrodes based on a mixture of acacia bark and nutmeg leaf waste for environmentally friendly energy storage
Titin Hartini, Novi Yanti, Erman Taer, Apriwandi Apriwandi, Vira Friska, Pharada Kresna, Julnaidi Julnaidi, Muhammad Nasir, Minarni Shiddiq, Erwin Amiruddin, Awaludin Martin, Rika Taslim
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227-232
Physical and structure properties of QS-P2O5-CaO-BaO-Gd2O3/GdF3 glasses medium doped with europium (III)
Adella Patrisia Lubis, Elyzabeth Simanullang, Jonny H Panggabean, Juniar Hutahaean, Howard Situmorang, Zulkarnain Zulkarnain, Juniastel Rajagukguk
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233-240
Physical properties and structure of glass medium QS-P2O5-CaO-BaO-Gd2O3/GdF3 doped Dy3+
Maranata Sri Rejeki Simanjuntak, Elyzabeth Simanullang, Juniar Hutahaean, Zulkarnain Zulkarnain, Juniastel Rajagukguk
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241-248

Review

Correlation of surface area and ID/IG ratio of coconut shell graphene carbon synthesized using Hummers method: A review
Yana Fitri Anggreni, Rita Lestari, Seftri Harika, Yurike Fatmawati, Delovita Ginting, Romi Fadli Syahputra
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249-258
Zinc- and strontium-doped hydroxyapatite: A comparative review of synthesis, characterization, and biomedical applications
Elvina Putri
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259-266
Review of raman spectral characteristics of graphene derived from 10 types of biomass
Rita Lestari, Yana Fitri Anggreni, Seftri Harika, Yurike Fatmawati, Delovita Ginting, Romi Fadli Syahputra
267-272