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This Author published in this journals
All Journal Contemporary Mathematics and Applications (ConMathA) Indonesian Journal of Elt and Applied Linguistic The International Journal of Remote Sensing and Earth Sciences (IJReSES)
Kurnia Ulfa
Unknown Affiliation
Earth & Planetary Sciences Education Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics

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EFFECT OF ATMOSPHERIC CORRECTION ALGORITHM ON LANDSAT-8 AND SENTINEL-2 CLASSIFICATION ACCURACY IN PADDY FIELD AREA Fadila Muchsin; Kuncoro Adi Pradono; Indah Prasasti; Dianovita; Kurnia Ulfa; Kiki Winda Veronica; Dandy Aditya Novresiandi; Andi Ibrahim
International Journal of Remote Sensing and Earth Sciences Vol. 20 No. 1 (2023)
Publisher : BRIN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30536/j.ijreses.2023.v20.a3845

Abstract

Landsat-8 and Sentinel-2 satellite imageries are widely used for various remote sensing applications because they are easy to access and free to download. A precise atmospheric correction is necessary to be applied to the optical satellite imageries so that the derived information becomes more accurate and reliable. In this study, the performance of atmospheric correction algorithms (i.e., 6S, FLAASH, DOS, LaSRC, and Sen2Cor) was evaluated by comparing the object's spectral response, vegetation index, and classification accuracy in the paddy field area before and after the implementation of atmospheric correction. Overall, the results show that each algorithm has varying accuracy. Nevertheless, all atmospheric correction algorithms can improve the classification accuracy, whereby those derived by the 6S and FLAASH yielded the highest accuracy.
Utilization of GEE for Mapping Land Cover Changes in Settlements Before and After the 2018 Lombok Earthquake in North Lombok Regency Lia Fitta Pratiwi; Luzianawati; Nuzla Af'idatur Robbaniyyah; Kurnia Ulfa; Muhammad Rijal Alfian
Contemporary Mathematics and Applications (ConMathA) Vol. 8 No. 1 (2026)
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/conmatha.v8i1.76412

Abstract

A major earthquake struck Lombok, West Nusa Tenggara, in 2018, causing significant infrastructure damage, including in North Lombok Regency. This study aims to analyze land cover changes in North Lombok Regency before and after the earthquake using Sentinel-2 Level-1C satellite imagery. Through supervised classification using the Maximum Likelihood method, changes in the area of various land cover types, such as Bare Land, Paddy Field, Dense Vegetation, Water Bodies, and Built-up Areas, were identified and analyzed temporally in 2017, 2020, and 2023. The results show that the earthquake caused drastic changes in land cover in the study area, particularly a decrease in the area of dense vegetation and an increase in the area of bare land. These changes indicate significant ecosystem disruption caused by the earthquake. Subsequently, a recovery trend was observed in the 2020-2023 period. Changes in land cover, especially in built-up areas and bare land, are consistent with the earthquake's impact and subsequent reconstruction efforts.
THE EFFECTIVENESS OF PROJECT-BASED LEARNING IN RAISING TERTIARY STUDENTS' PROFICIENCY KURNIA ULFA
Indonesian Journal of ELT and Applied Linguistics Vol. 4 No. 2 (2024): INDONESIAN JOURNAL OF ELT AND APPLIED LINGUISTICS (IJEAL)
Publisher : Magister of English language Education study program, Universitas Muslim Nusantara Al Washliyah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32696/ijeal.v4i2.5095

Abstract

English speaking proficiency is a critical skill in both academic and professional contexts, especially for English as a Foreign Language (EFL) learners. Traditional language instruction, which often emphasizes grammar and writing, frequently fails to develop learners’ speaking fluency and confidence. This study investigates the effectiveness of Project-Based Learning (PBL) in enhancing English-speaking skills among first-semester Informatics students at the tertiary level. Grounded in constructivist and communicative language teaching theories, PBL emphasizes real-world communication, collaboration, and learner autonomy. Using a descriptive method, students participated in a one-month instructional project that culminated in video presentations, assessed across five key speaking indicators: comprehension, grammar, vocabulary, pronunciation, and fluency. After a one-month PBL intervention, it was shown that 20% of students reached the highest proficiency level (score 85-90), then 55% performed at an average level (score 75-80), and 25% remained at a lower proficiency level (score 60-70). 100% of students showed improvement: high and average performers improved by 15 points on average, and low performers improved by 10 points. Results showed significant improvement across all proficiency levels, particularly among high- and average-performing students. The findings indicate that PBL effectively improves learners’ speaking abilities by promoting engagement, authentic language use, and confidence. However, lower-performing students may require additional scaffolding and support. This study supports the integration of PBL into EFL curricula to promote more interactive and meaningful language learning experiences.
Co-Authors Andi Ibrahim Dandy Aditya Novresiandi Dianovita Fadila Muchsin Indah Prasasti Kiki Winda Veronica Kuncoro Adi Pradono Lia Fitta Pratiwi Luzianawati Muhammad Rijal Alfian Nuzla Af'idatur Robbaniyyah