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All Journal Journal of Physics: Theories and Applications Indonesian Journal of Community Empowerment
Fausta, Devara Ega
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Humanities Decision Sciences, Operations Research & Management Education Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Physics Social Sciences Other

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Strengthening Ngledoksari Village, Tawangmangu, Karanganyar as a Disaster-Resilient Village Through a Landslide Early Warning System Marzuki, Ahmad; Munandar, Choirul Singgih; Ekaputra, Muhammad Raihanriza; Nisya, Saidatul; Pratiwi, Isnaini Intan; Rafi, Muhammad; Desandi, Akmal; Rizqy, Miftahul; Wang, Jasson Franklyn; Hidayah, Maulina Nurul; Al Mutawakil, Hana Syahidah; Meili, Sunti Nur; Neineza, Nania Riswanda; Faruq, Alfan Umar; Fausta, Devara Ega
Indonesian Journal of Community Empowerment (IJCE) Vol 7 No 2 (2026): Indonesian Journal of Community Empowerment (May)
Publisher : Fakultas Kewirausahaan Universitas Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35899/ijce.v7i2.1198

Abstract

Ngledoksari Village is one of the landslide-prone areas in Karanganyar Regency due to its hilly geographical location, many steep slopes, and high rainfall. This community service activity aims to strengthen community preparedness in facing landslide disasters through the implementation of Early Warning System (EWS) technology. The method used is Participatory Action Research which includes location surveys, installation, socialization and training on the use of tools to the community. The results of the activity are the installation of EWS tools at several strategic points, namely in Tegalsari Village & Nglurah Village Border. In addition, the socialization process shows an increase in community understanding regarding disaster mitigation and the ability to respond to early warnings independently. It is hoped that the installed EWS tools can be an effective solution to strengthen community-based disaster warning systems in landslide-prone areas
Impact of Nd2O3 on physical properties of lead borate glass system Marzuki, Ahmad; Astuti, Retno Willy; Fausta, Devara Ega; Kasy, Fransisca Indraningsih; Mahasindi, Melya Ayu
Journal of Physics: Theories and Applications Vol 7, No 2 (2023): Journal of Physics: Theories and Applications
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jphystheor-appl.v7i2.71762

Abstract

The Nd2O3 doped lead borate glass with composition 45B2O3-(40-x)PbO-11ZnO-4Na2O-xNd2O3 (x=0; 0.5; 1.0; 1.5; 2.0; 2.5) mol% were fabricated using melt quenching method at 950oC for 35 minutes. The characterization of physical properties of glasses doped Nd2O3 were measured by density (ρ) based on the Archimedes principle. The other physical parameters such as molar volume (Vm), oxygen packing density (OPD), polaron radius (rp), ionic radius (ri), field strength (F), molar refraction (Rm), and metallization (Mn) were calculated using equation which derived from density. According to the measurement, the density of glasses decreased from 5.774 to 4.527 gr/cm3 while molar volume oppositely increased from 23.17 to 30.18 cm3/mol due to  atomic mass of Nd (144.24) smaller than Pb (207.2). Along with the increase of molar volume, there were decreasing of the OPD, the polar radius (1.731 －1.095) Å and the ion radius (4.296－2.717) Å iof glasses Meanwhile, the field strength and metallization properties of the glasses  increased as a result of the reduction rp and ri. The investigation of molar refractive shows an increasing trend because the addition of the concentration Nd2O3.
Effect of sodium oxide (Na2O) glass modifier on physical properties and gamma shielding in tellurite glass systems TeO2-ZnO-PbO-Bi2O3 (TZPB) Marzuki, Ahmad; Ariyanti, Selvina; Alvyanti, Frisca Aulia; Kasy, Fransisca Indraningsih; Fausta, Devara Ega; Riyatun, Riyatun; Sari, Arum Luvita
Journal of Physics: Theories and Applications Vol 7, No 1 (2023): Journal of Physics: Theories and Applications
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jphystheor-appl.v7i1.71795

Abstract

TZPB glasses with the composition 55TeO2-(41-x)ZnO-2Bi2O3-2PbO-xNa2O (x= 2; 2.5; 3; 3.5 mol%) have been fabricated and characterized to determine the physical properties and gamma radiation shielding parameters. The method of glass fabrication is melt quenching with the holding temperature at 900˚C for 30 minutes and the annealing temperature at 256˚C for 6 hours. The result of the characterization of the density and gamma shielding parameters was calculated using Phy-X PSD software. The glass density was measured using Archimedes's principle and showed a decrease from 5.79 to 5.73 g/cm3. The molar volume increased from 23.3 to 23.6 g/mol with the addition of Na2O concentration. Gamma radiation shielding parameters, LAC, MAC, MFP, HVL, and TVL simulated with the energy range were 10-3-105 MeV. The results of Phy-X/PSD software showed an increasing MAC, MFP, HVL, and TVL and decreasing in LAC with an increase in Na2O concentration.
Co-Authors Ahmad Marzuki Al Mutawakil, Hana Syahidah Alvyanti, Frisca Aulia Ariyanti, Selvina Astuti, Retno Willy Desandi, Akmal Ekaputra, Muhammad Raihanriza Faruq, Alfan Umar Hidayah, Maulina Nurul Kasy, Fransisca Indraningsih M. Rafi Mahasindi, Melya Ayu Meili, Sunti Nur Munandar, Choirul Singgih Neineza, Nania Riswanda Nisya, Saidatul Pratiwi, Isnaini Intan Riyatun, Riyatun Rizqy, Miftahul Sari, Arum Luvita Wang, Jasson Franklyn