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All Journal Journal of Degraded and Mining Lands Management Journal of English Language and Education
Sonya, Putri
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Languange, Linguistic, Communication & Media Other

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Assessing land subsidence from anthropogenic activity in Northern Sumatra, Indonesia revealed using SAR interferometry Perdana, Redho Surya; Anggara, Ongky; Suhadha, Argo Galih; Pangestika, Dita Mulia; Atmojo, Aulia Try; Al Attar, Muhammad Nabil; Sonya, Putri; Alif, Satrio Muhammad
Journal of Degraded and Mining Lands Management Vol. 12 No. 2 (2025)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2025.122.7235

Abstract

Land subsidence is a significant issue in urban areas globally, including several cities with a growing population in Northern Sumatra, Indonesia. This study employs Sentinel-1 SAR data and the Small Baseline Subset (SBAS) InSAR technique to monitor land subsidence in Medan, Deli Serdang, Dumai, North Aceh, and Lhokseumawe from 2015 to 2023. The SBAS algorithm was implemented in LiCSBAS with an unwrapped interferogram. Then corrected for atmospheric effects using GACOS, was employed to increase the results of the land subsidence. The analysis was enhanced using GRACE satellite data to assess the impact of groundwater depletion on subsidence. Results indicate significant subsidence across all study regions, particularly in Medan and Dumai, with rates ranging from -48.6 mm/year to +54.1 mm/year. The findings highlight the critical role of rapid urbanization, excessive groundwater extraction, and oil and gas exploration in driving subsidence. This study underscores the need for sustainable urban planning and aquifer management to mitigate future environmental and infrastructural risks.
The Role of Sharing Phase in Think-Pair-Share Technique in Promoting Deep Learning and Student’s Speaking Confidence: A Qualitative Study Sonya, Putri; Seinsiani, Izzati Gemi
Journal of English Language and Education Vol 11, No 1 (2026)
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jele.v11i1.2061

Abstract

In the context of global communication, student’s speaking confidence and deep learning have become essential competencies in the  EFL classroom. However, many Indonesia students still experience high affective barriers during speaking activities, while previous studies have largely focused on the overall effectiveness of cooperative strategies rather than specific instructional stages. This study aims to explore the role of the Sharing phase in the Think-Pair-Share technique in promoting deep learning and students’ speaking confidence. Employing a descriptive qualitative design, data were collected through classroom observations, learning experience questionnaires, and semi-structured interviews. The findings reveal that the Sharing phase reduces speaking anxiety through social validation, enhances students’ confidence, and supports deep learning by encouraging idea reconstruction and reflective communication. The study concludes that the Sharing phase functions as a critical pedagogical stage that integrates emotional safety with cognitive development in the EFL speaking classrooms.
Co-Authors Al Attar, Muhammad Nabil Atmojo, Aulia Try Pangestika, Dita Mulia Perdana, Redho Surya Satrio Muhammad Alif Seinsiani, Izzati Gemi Suhadha, Argo Galih