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All Journal Applied Information System and Management Journal Social Science And Technology For Community Service Journal of Earth and Marine Technology (JEMT) Geoid - Journal of Geodesy and Geomatics
Rahayu, Ririn Wuri
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Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Physics Transportation

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Landslide Susceptibility Zonation Using Analytic Hierarchy Process Method in the Karangbolong Hills Area, Indonesia Susilowati, Susilowati; Radityo, Daniel; Aminulloh, Dzikru; Rahayu, Ririn Wuri
Journal of Earth and Marine Technology (JEMT) Vol 5, No 2 (2025)
Publisher : Lembaga Penelititan dan Pengabdian kepada Masyarakat - Institut Teknologi Adhi Tama Suraba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jemt.2025.v5i2.7346

Abstract

The highest frequency of landslides in Kebumen Regency is observed in the Ayah Subdistrict and Buayan Subdistrict, which are in the southern part of the Karangbolong Hills. This area are the targets for the construction of the 14.03 km Ayah-Jladri Southern Cross Road (JJLS). Consequently, the objective of this study is to create a landslide susceptibility map utilizing the Analytic Hierarchy Process (AHP) methodology. Some causative factors are used to develop landslide susceptibility maps i.e. elevation, slope gradient, aspect and curvature, lithology and lineament density, distance from streams, land use and distance from roads. A total number of 128 landslide events are considered in the study. This method identified five susceptibility zones based on LSI value: very low (141.79-241.74), low (241.75-293.73), moderate (293.74-334.52), high (334.53-374.89), and very high (374.90-460.50). The landslide susceptibility map was validated, with an AUC value of 0.749, suggesting that the map provides good results.
PENGARUH KOREKSI BIAS IONOSFER TERHADAP HASIL KOORDINAT PENGAMATAN GPS SINGLE FREQUENCY MENGGUNAKAN MODEL KLOBUCHAR Rahayu, Ririn Wuri; Cahyadi, Mokhamad Nur; Muslim, Buldan
GEOID Vol. 14 No. 1 (2018)
Publisher : Departemen Teknik Geomatika ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/geoid.v14i1.1587

Abstract

Sinyal satelit GPS dipengaruhi oleh beberapa jenis faktor kesalahan, di antaranya penundaan sinyal GPS oleh ionosfer. Pada GPS single frequency bias ini dapat dikoreksi menggunakan Model Klobuchar, yang memperkirakan penundaan waktu ionosfer hingga 50% atau lebih. Untuk menggunakan model Klobuchar membutuhkan delapan koefisien Klobuchar (  n,   n, untuk n = 1,2,3,4) dan disediakan melalui pesan navigasi. Koefisien Klobuchar didapatkan dari perhitungan data pengamatan GPS yang terdistribusi di seluruh dunia dengan metode yang tidak terpublikasi. Dalam penelitian  ini, satu set koefisien Klobuchar dihitung menggunakan data pengamatan GPS lokal sehari sebelumnya dan digunakan  sebagai parameter navigasi pada hari selanjutnya untuk menentukan koordinat titik pengamat. Penelitian  ini menggunakan perangkat lunak RTKLIB untuk mengolah hasil koordinat. Hasil tugas akhir ini didapatkan nilai koordinat meningkat sebesar 26,015% dengan menggunakan koefisien lokal.
Cocoa Land Suitability Analysis Using ID3 Spatial Algorithm Nurkholis, Andi; Rahayu, Ririn Wuri; Ferriyan, Andrey; Ni’mawati, Akfina
Applied Information System and Management (AISM) Vol. 8 No. 2 (2025): Applied Information System and Management (AISM)
Publisher : Depart. of Information Systems, FST, UIN Syarif Hidayatullah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/aism.v8i2.46681

Abstract

Cocoa production in Indonesia encounters ongoing challenges due to declining plantation areas and suboptimal land utilization. This study applies the ID3 Spatial algorithm to evaluate land suitability for cocoa cultivation in Bogor Regency, West Java Province. The methodology integrates nine basic land characteristics, including elevation, drainage, relief, base saturation, cation exchange capacity, soil texture, soil pH, and mineral soil depth, derived from field surveys conducted by BBSDLP. Two classification models were developed and tested using spatial data preprocessing techniques. Model M1 was the baseline approach without constraints, while Model M2 incorporated a minimum planted area threshold of ≥1 ha. The results show notable performance differences between models. Model M2 achieved a reasonable accuracy of 87.27% compared to Model M1’s 29.09%, with relief identified as the root node due to its higher gain value and reduced entropy. Classification results indicate that Bogor Regency’s cocoa cultivation potential comprises 16,443 ha of S2 (moderately suitable) land and 231,018 ha of S3 (marginally suitable) land. The generated land suitability map may provide stakeholders with helpful guidance for identifying potential cultivation areas. The result suggests that artificial intelligence integration, specifically the ID3 spatial algorithm, could improve land suitability evaluation processes, potentially supporting more informed agricultural development decisions.
Penerapan Aplikasi Mobile Company Profile Tambang Batu Andesit Pada CV Handika Karya Nurkholis, Andi; Sakti, Hakim Erlangga Bernado; Rahayu, Ririn Wuri; Firmansyah, Ilham
Journal of Social Sciences and Technology for Community Service (JSSTCS) Vol 6, No 1 (2025): Volume 6, Nomor 1, March 2025
Publisher : Universitas Teknokrat Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33365/jsstcs.v6i1.4909

Abstract

Di era digital saat ini, kehadiran teknologi mobile telah mengubah cara perusahaan berkomunikasi dengan pelanggan dan pemangku kepentingan. CV. Handika Karya, sebuah perusahaan penambangan batu andesit yang masih menjalankan sistem manajemen secara konvensional, dapat memanfaatkan aplikasi mobile company profile untuk meningkatkan visibilitas, mempromosikan praktik penambangan yang berkelanjutan, mengedukasi masyarakat, serta meningkatkan daya saing. Kegiatan pengabdian kepada masyarakat yang dilakukan oleh tim dosen Universitas Pembangunan Nasional "Veteran" Yogyakarta bertujuan untuk menerapkan aplikasi mobile company profile sebagai solusi strategis dalam menghadapi tantangan digitalisasi. Melalui tahapan observasi, pelaksanaan, dan pelaporan, tim PKM mengembangkan aplikasi yang memungkinkan CV. Handika Karya menampilkan informasi penting seperti profil perusahaan, produk batu andesit, proses penambangan ramah lingkungan, serta program tanggung jawab sosial secara digital. Implementasi aplikasi ini memberikan manfaat signifikan termasuk peningkatan transparansi, kemudahan akses informasi, partisipasi masyarakat dalam pengawasan, edukasi industri tambang, pengembangan ekonomi lokal, dan peningkatan kualitas komunikasi. Kegiatan ini mendapat respons sangat positif dari perusahaan, ditunjukkan dengan partisipasi aktif karyawan dan penyediaan fasilitas yang diperlukan, serta terbukti efektif berdasarkan hasil kuesioner kepuasan dan kemudahan penggunaan. Bagi tim dosen, program ini menjadi wadah untuk mengaplikasikan ilmu pengetahuan dan berkontribusi kepada masyarakat melalui pengembangan solusi teknologi informasi yang inovatif.
Co-Authors Aminulloh, Dzikru Andi Nurkholis Andrey Ferriyan, Andrey Buldan Muslim Firmansyah, Ilham Mokhamad Nur Cahyadi, Mokhamad Nur Ni’mawati, Akfina Radityo, Daniel Sakti, Hakim Erlangga Bernado Susilowati Susilowati