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Hendi Santoso
Universitas OSO
Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Mathematics Mechanical Engineering Social Sciences Other

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Exploration of ethnomathematics in the coastal areas of West Kalimantan Dodi; Zan Zibar; Robin Saputra; Hendi Santoso; Rizqan Khairan Munandar
Ethnomathematics Journal Vol. 7 No. 1 (2026): March
Publisher : Ethnomath Association in cooperation with Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/ej.v7i1.89451

Abstract

This study explores the ethnomathematical practices of coastal communities in West Kalimantan, Indonesia, revealing how traditional knowledge systems contain rich mathematical concepts embedded in daily life activities. Utilizing qualitative methods, field observations, interviews, and documentation, the research highlights how local practices such as maritime navigation, time estimation, fishing tool construction, trade measurements, and traditional crafts reflect applied mathematics. Although these concepts are not formally expressed in academic terms, they demonstrate a deep understanding of geometry, arithmetic, estimation, and patterns. The study underscores the potential of integrating ethnomathematics into formal education to create a more contextual, inclusive, and culturally relevant mathematics curriculum. These findings support of mathematics education by recognizing and legitimizing indigenous knowledge systems as valuable learning resources. By incorporating local mathematical practices into teaching, educators can bridge the gap between abstract concepts and students’ lived experiences, fostering deeper engagement, enhancing critical thinking, and strengthening cultural identity.
Analisis Spasial Kerapatan dan Kondisi Ekologis Mangrove Menggunakan Citra Sentinel-2A di Desa Dusun Kecil Kabupaten Kayong Utara Saputra, Robin; Zibar, Zan; Khairan Munandar, Rizqan; Santoso, Hendi; Dodi, Dodi
Jurnal Kelautan, Lingkungan, dan Perikanan Vol 7 No 1 (2026): MANFISH JOUNAL
Publisher : Jurusan Ilmu Kelautan dan Perikanan Politeknik Negeri Pontianak

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31573/manfish.v7i1.1167

Abstract

Penelitian ini bertujuan untuk menganalisis kondisi kesehatan ekosistem mangrove di Desa Dusun Kecil, Kabupaten Kayong Utara, melalui integrasi data penginderaan jauh Sentinel-2A, indeks vegetasi NDVI, klasifikasi berbasis piksel, serta pengukuran kualitas air. Pengolahan citra meliputi koreksi atmosferik dan geometrik, perhitungan NDVI, serta klasifikasi (SVM) untuk membedakan mangrove, non-mangrove, dan perairan. Data lapangan digunakan sebagai sampel validasi untuk menilai akurasi hasil klasifikasi. Hasil penelitian menunjukkan bahwa mangrove di wilayah kajian mencakup luas ±5.708,53 ha dengan delapan spesies utama, didominasi oleh Rhizophora apiculata yang mencerminkan kondisi substrat berlumpur dan dinamika pasang surut yang mendukung. Analisis NDVI mengidentifikasi tiga kelas kerapatan mangrove, yaitu rapat (3.357,59 ha), sedang (2.164,76 ha), dan jarang (186,18 ha), dengan dominasi kelas rapat yang menunjukkan kondisi ekologi yang relatif baik. Kualitas air di sekitar mangrove juga berada pada kisaran optimal untuk pertumbuhan, dengan suhu 29,72–32,69°C, DO 3,50–6,68 mg/L, salinitas 11,21–29,04 ppt, dan pH 7,69–8,29. Klasifikasi SVM menghasilkan nilai Akurasi Keseluruhan 75,73% dan Kappa 0,6579, sehingga dapat dikategorikan cukup baik untuk pemetaan tutupan lahan menggunakan citra resolusi menengah. Secara keseluruhan, integrasi NDVI, klasifikasi SVM, dan data kualitas air mengenai kondisi ekosistem mangrove yang masih relatif stabil, serta mengidentifikasi area berkerapatan rendah yang memerlukan perhatian konservasi dan pemantauan lebih lanjut.
Co-Authors Adityo Raynaldo Al-Fikri, Shihab Hidayat Andrew Joewono Asep Priatna Danuarti, Dini Dodi Dodi Dodi, Dodi ELPE BIBAS, ELPE Fitriyan Kurnia Hestirianoto, Totok Indra Jaya Indra Jaya Irma Ramadhani Febriaty Kamsiah Kamsiah Khairan Munandar, Rizqan Lestari, Fikanti Putri Muhammad Hafidz, Muhammad Naniek Tri Utami Ramadhani, Hendri Riza Linda Rizqan Khairan Munandar Rizqan Khairan Munandar Robin Saputra Samsul Bahri Sandy Kurnia Christmas Sitepu, Rasional Siti Shofiyah, Sofi Sri Pujiyati Zalianti, Martela Zibar, Zan