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All Journal Spektra: Jurnal Fisika dan Aplikasinya PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL)
Selsa Sururiyah Sya’baniah
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Aerospace Engineering Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics Other

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DENTIFICATION AND CLASSIFICATION OF SOIL TYPES IN THE SERANG REGION USING Vs30 GEOMORPHOLOGICAL DATA: IDENTIFIKASI KLASIFIKASI JENIS TANAH DI WILAYAH SERANG MENGGUNAKAN DATA Vs 30 GEOMORFOLOGI Selsa Sururiyah Sya’baniah; Agus Setyo Budi; Nur Fani Habibah
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol. 13 (2025): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2024
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/03.1301.FA34

Abstract

This study aims to identify and classify soil types in the Serang area using geomorphology-based Vs30 data as the main parameter. The geomorphological method analyzes the physical characteristics and morphology of soils, while Vs30 measures shear wave velocity to a depth of 30 meters to evaluate soil strength and stability. The geomorphology map and Vs30 map are interconnected to comprehensively present soil distribution and properties. The Indonesian Local Footprint Atlas (Vs30) prepared by PVMBG, using engineering geomorphology classification, is the main reference in this study to create seismic/earthquake hazard maps in Serang. The results show a close relationship between Vs30 and geomorphology, which includes variations in soil texture, structure and geotechnical conditions in Serang. This information is critical for land use planning, disaster mitigation and resource management. The research highlights the importance of Vs30 data in producing accurate data, where soil class affects earthquake acceleration and intensity. Determination of soil class using geological and morphological parameters and Vs30, classified according to SNI standards, is an important step in earthquake risk management in this region.
Analysis of the Effect of ZnO, FeO, MnO, and MgO Dopants on the Optical Properties of P2O5-CaO Glass System and Comparison With P2O5-Eggshell Glass System Haifany; Eka Laela Nun Karina; Selsa Sururiyah Sya’baniah; Zahra Sajidah Hariyawan; Haryanto; Agus Setyo Budi; Anggara Budi Susila; Hadi Nasbey
Spektra: Jurnal Fisika dan Aplikasinya Vol. 10 No. 2 (2025): SPEKTRA: Jurnal Fisika dan Aplikasinya, Volume 10 Issue 2, August 2025
Publisher : Program Studi Fisika Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/SPEKTRA.102.06

Abstract

This study investigates the effect of ZnO, FeO, MnO, and MgO dopants on the optical properties of phosphate-based glass within the P₂O₅–CaO system and compares the results with glasses using eggshell-derived CaO as an alternative calcium source. The glass samples were synthesized using the melt quenching method, followed by characterization using Energy Dispersive X-ray (EDX) and UV-Visible spectroscopy. EDX analysis confirmed that phosphorus and oxygen were the dominant elements in all samples, with successful incorporation of each dopant as a network modifier. UV-Vis analysis revealed that the optical properties of the glass were significantly affected by both dopant type and concentration. The addition of ZnO decreases absorbance and widens the band gap up to 10 mol%, indicating improved structural regularity of the glass network. MnO exhibits a non-linear trend, with the highest absorbance observed at 5 mol% and decreasing at higher concentrations. The band gap varies from 3.37 eV to 3.59 eV, suggesting a transition from a disordered to a more stable and compact glass structure. In contrast, FeO and MgO doping reduced the band gap energy due to increased formation of non-bridging oxygen and network disruption. Additionally, comparison with eggshell-derived CaO showed higher UV absorbance compared to glass made with pure CaO, especially in the wavelength range below 400 nm, indicating that the raw material source influences the optical performance of the glass. Overall, this research highlights the potential of tuning dopant concentration and utilizing sustainable raw materials to enhance the optical characteristics of phosphate glass for use in UV-blocking, optoelectronic, and sensor applications.
Co-Authors Agus Setyo Budi Anggara Budi Susila Eka Laela Nun Karina Hadi Nasbey Haifany HARYANTO Nur Fani Habibah Zahra Sajidah Hariyawan