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Landslide Surface Prediction with Combined HVSR and VES Geophysical Techniques: Case Study in Semarang City, Indonesia Fadlan, Andi; Hartono, Hartono; Saregar, Antomi; Panse, Vishal R.; Rahate, Gaurav; Shukla, Anita
International Journal of Hydrological and Environmental for Sustainability Vol. 3 No. 2 (2024): International Journal of Hydrological and Environmental for Sustainability
Publisher : CV FOUNDAE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58524/ijhes.v3i2.442

Abstract

Abstract. There are settlements in Tambakaji, Semarang City, which are threatened with landslides because they are located right at the foot of the slope, so research is needed to determine the potential for landslides on the slope. Landslide potential can be identified by identifying the presence of slip planes on the slopes and knowing the soil classification. The prediction of the presence of slip planes is done using the resistivity method while the soil classification uses the HVSR method. The HVSR method is also used to determine the depth of the sediment layer to strengthen the suspicion of the existence of a slip plane in the resistivity method. Based on the results of research using the resistivity method, it shows that the slope has the potential for landslides because it is suspected to have a slip plane at a depth of 20-23 meters (reinforced by the results of the HVSR method which obtains a sediment thickness value of about 23.4 -23.8 meters), but the rate of landslides falls into in the low category because the layer of sediment above it is classified as hard soil.
High-Resolution Resistivity Analysis of Andesite Rock Distribution in Kulon Progo’s Mineral-Rich Terrain Prastowo, Rizqi; Sugarbo, Oky; Setiawan, Nanda Juli; Pambudi, Setyo; Murkute, Yogesh; Panse, Vishal R.
International Journal of Hydrological and Environmental for Sustainability Vol. 4 No. 2 (2025): International Journal of Hydrological and Environmental for Sustainability
Publisher : CV FOUNDAE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58524/ijhes.v4i2.707

Abstract

This study employs integrated geophysical methods to analyze the spatial distribution and subsurface geometry of andesitic rock formations in the Mujil Hill area, Kulon Progo, Yogyakarta. Electrical resistivity imaging (ERI), using a dipole-dipole configuration, was conducted to identify high-resistivity zones (>1000 Ωm), which are interpreted as fresh andesitic intrusions. These zones are consistently found at an average depth of 10 meters, embedded within moderately resistive volcanic breccia. Near-surface layers with low resistivity values (<100 Ωm) are associated with weathered volcanic deposits or unconsolidated soil. To enhance subsurface structural interpretation, resistivity data were complemented with gravity modeling, providing a more comprehensive geological assessment. The results confirm the lateral continuity and shallow emplacement of andesite bodies, highlighting their potential as a local source of construction material. This integrated geophysical approach supports sustainable mineral resource development and aligns with the objectives of the regional economic empowerment program, contributing to the responsible utilization of local geological resources.
Enhancing Third Grade Students’ Learning Outcomes in Science and Social Studies Through Game-Based Learning: A Classroom Action Research Sari, Meirita; Yunilarosi, Elvida Sari; Ula, Siti Mubarokatul; Panse, Vishal R.; Shukla, Alok; Omanwar, Shreeniwas
Islamic Journal of Integrated Science Education (IJISE) Vol. 4 No. 3 (2025): November
Publisher : Program Studi Tadris IPA, Fakultas Tarbiyah (IAIN) Kediri, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30762/ijise.v4i3.6655

Abstract

The low learning outcomes of third-grade students at SDN 2 Rambang in Science learning. Therefore, innovation through game-based learning is needed. This research aims to improve the learning outcomes of third-grade students at SDN 2 Rambang on the topic of the life cycle of living things in Science learning using the game-based learning method. The subjects of this research were 19 third-grade students at SDN 2 Rambang. The method used in this research was Classroom Action Research which was carried out in 2 cycles. The instruments used included observation sheets, learning outcome tests, and documentation. The results of the research showed that the application of the game-based learning method could improve student learning outcomes. In the pre-cycle, only 6 out of 19 students (31.6%) achieved scores above the Minimum Completeness Criteria. In the first cycle, this increased to 12 students (63.2%), and in the second cycle, it further increased to 19 students 100%). In addition to the increase in learning outcome scores, students also showed increased motivation, activeness, and understanding of the material. Thus, it can be concluded that the game-based learning method is effective in improving student learning outcomes in Science learning, especially on the topic of the life cycle of living things.
Fabrication and Characterization of Environmentally Friendly Bioplastic Film Based on Chitosan from Cassava Peel Starch Reza, Muhammad Fahmi; Irfan, Akhmad; Hakim, M Furqon; Wicaksono, Kristya Hadi; Panse, Vishal R.; Shukla, Alok
International Journal of Hydrological and Environmental for Sustainability Vol. 4 No. 3 (2025): International Journal of Hydrological and Environmental for Sustainability
Publisher : CV FOUNDAE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58524/ijhes.v4i3.791

Abstract

Bioplastics are renewable materials capable of natural degradation and can be synthesized using bio-organic compounds such as cellulose, chitosan, carboxymethyl cellulose (CMC), and glycerol. Cassava peels, an agricultural byproduct, are a rich source of starch and cellulose, making them a promising raw material for bioplastic production. This study aims to fabricate and characterize chitosan-based bioplastic films using cassava peel starch, with a focus on optimizing their mechanical and biodegradation properties. Bioplastic films were prepared by combining cassava peel starch, chitosan, CMC, and glycerol, with chitosan concentrations varied at 45% and 75%. The films were evaluated for surface morphology using Scanning Electron Microscopy (SEM), tensile strength, elongation at break, water absorption capacity, and biodegradability. SEM analysis revealed that chitosan concentration significantly influenced the film morphology, which in turn affected mechanical and swelling properties. The highest tensile strength (0.07 MPa) and elongation (22.5%) were observed in films with 75% chitosan. Water absorption peaked at 93.32% for the same formulation. Biodegradability tests showed complete degradation (100%) within 12 days for films with 45% chitosan. These findings demonstrate that cassava peel starch combined with chitosan can produce biodegradable films with tunable properties, offering a sustainable alternative for packaging and other applications.