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All Journal INFORMASI (Jurnal Informatika dan Sistem Informasi) Petro : Jurnal Ilmiah Teknik Perminyakan Prosiding Seminar Nasional Rekayasa Teknologi Industri dan Informasi ReTII
Riyadi, Hasan
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Estimasi Sumberdaya Skarn Logam Dasar Dengan Metode Geostatistik Ordinary Kriging Blok A Ruwai Kabupaten Lamandau Provinsi Kalimantan Tengah Riyadi, Hasan; I Wayan Warmada; Anastasia Dewi Titisari; Arifudin Idrus
Retii Vol 18 No 1 (2023): Prosiding Seminar Nasional ReTII ke-18 (Edisi Penelitian)
Publisher : Institut Teknologi Nasional Yogyakarta

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Abstract

This research aims to determine the shape of the block model and the distribution of ore deposits and to determine the results of the resource estimation of base metal skarn. Mineral resource estimation reflects the shape and distribution of a mineral deposit so that it can be used as a basis for estimating reserves or mining activities. The data used in this study are the results of exploration drilling, namely collar, assay, survey and lithology. The estimation of base metal skarn resources in this study uses the ordinary kriging method with a block model measuring 10m x 5m x 3m. The results of the estimation of metal skarn resources of Block A Ruwai using the method obtained tonnage for inferred resources of 19,452 tons, indicated 29,542 tons and measured 16,546 tons with an average Pb-Zn content of 10.71%, 10.85% and 11.51%. The estimation results of the ordinary kriging method were compared with the composite data of Pb-Zn content (raw initial data) to determine its accuracy based on cross validation parameters. From the cross validation results, the RMSE (root mean square error) value is 0.40 which is close to 0 (zero), the correlation coefficient (r) is 0.83 and the coefficient of determination (r2) is 0.7 which is close to 1, so the estimation results are considered good enough.
Analisis Pengaruh Kualitas Website PPDB Online Terhadap Kepuasan Operator Sekolah Dasar (Studi Kasus Disdikpora Kab. Penajam Paser Utara) Riyadi, Hasan; Robertus Ila Bakho; Joy Nashar Utamajaya
INFORMASI (Jurnal Informatika dan Sistem Informasi) Vol 16 No 2 (2024): INFORMASI (Jurnal Informatika dan Sistem Informasi)
Publisher : LPPM STMIK Indonesia Mandiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37424/informasi.v16i2.312

Abstract

Penelitian ini bertujuan untuk mengetahui hubungan kepuasan kepala sekolah dasar dengan kualitas website PPDB online (menggunakan studi kasus Disdikpora Kabupaten Penajam Paser Utara). Penelitian ini menggunakan metodologi kuantitatif. Pemilik SD Disdikpora Kabi dijadikan sebagai subjek penelitian. Penajam Paser Utara mengambil sampel sebanyak 39 responden. Kuesioner digunakan dalam proses pengumpulan data. Metode pengujiannya meliputi uji analisis regresi yang menggabungkan temuan uji t, uji F, dan koefisien determinasi, serta uji validitas, uji reliabilitas, dan uji hipotesis tradisional. Berdasarkan temuan uji t, variabel kualitas kegunaan (X1) mempunyai pengaruh yang signifikan terhadap kepuasan administrator sekolah (Y) dengan nilai signifikansi sebesar 0,001. Nilai t estimasi sebesar 2739 menunjukkan bahwa nilai signifikansi kurang dari 0,05 dan nilai t lebih besar dari t tabel (2,739 > 2,026). Kepuasan pengelola sekolah (Y) secara parsial dipengaruhi oleh kualitas informasi (X2), dengan nilai thitung sebesar 2,913 dan nilai signifikansi sebesar 0,006. Oleh karena itu, nilai signifikansi t-tabel adalah (2,913). > 2,026 maka Ho ditolak dan Ha disetujui. Hasil uji F menunjukkan bahwa variabel kualitas informasi (X2) dan kualitas kegunaan (X1) mempunyai pengaruh secara simultan terhadap kepuasan administrator sekolah (Y). Memiliki estimasi F-value sebesar 52,017 dan nilai signifikansi sebesar 0,000. Oleh karena itu, karena nilai signifikansi F tabel (52,017 > 3,250), maka Ho ditolak dan Ha disetujui. Selain itu, nilai 0,729 atau 72,9% ditunjukkan oleh uji koefisien determinasi R2 terkoreksi (R-squared). Hal ini menunjukkan bahwa kualitas informasi (X2) dan kualitas kegunaan (X1) mempunyai pengaruh persentase sebesar 72,9% terhadap ukuran kepuasan administrator sekolah (Y). Faktor lain yang tidak termasuk dalam penelitian ini berdampak pada sisanya sebesar 27,1%.
EVALUASI BATUAN INDUK FORMASI TALANG AKAR ATAS BERDASARKAN DATA GEOKIMIA DI DESA BUKIT SUBAN, KABUPATEN SAROLANGUN, SUB-CEKUNGAN JAMBI Alfayed, Muhammad Rus Dody; Riyadi, Hasan; Zelandi, Muhammad; Siregar, Yusmansyah; Syaifudin, M.
Petro : Jurnal Ilmiah Teknik Perminyakan Vol. 14 No. 4 (2025): Desember 2025
Publisher : Jurusan Teknik Perminyakan Fakultas Teknologi Kebumian dan Energi Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/petro.v14i4.24537

Abstract

Our oil and gas exploration must be able to understand the concept of the petroleum system. Source rock is one of the most important parameters in the petroleum system that functions as a hydrocarbon producer or source rock, even placing the bedrock as the number one priority that must be present in the petroleum system (Magoon and Dow, 1994). This study aims to determine the potential of parent rocks in the Upper Talang Akar Formation in the research area to produce hydrocarbons. The research method was carried out using surface samples, geochemical analysis of Total Organic Carbon, Rock-Eval Pyrolysis and Vitrinite Reflektance. Based on the results of geochemical analysis research that has been carried out on the source rock of the Upper Talang Akar Formation, the characteristics of the potential of the source rock in producing hydrocarbons have a rich organic material range (1.38 – 4.06), based on TOC data, the sample of the source rock of the Upper Talang Akar Formation has quite good potential. Analysis of organic material types in the study area's source rock samples yielded kerogen types II and III that have the potential to produce oil and gas hydrocarbons. The maturity level analysis is based on Tmax data of the Upper Talang Akar Formation source rock has an immature maturity level and based on Ro data, the upper Talang Akar of the source rock has an immature maturity level. Therefore, it can be concluded that the shale source rock of the Upper Talang Akar Formation in the research area has the potential to produce good to very good hydrocarbons and produce oil and natural gas in the immature phase.
Co-Authors Alfayed, Muhammad Rus Dody Anastasia Dewi Titisari Arifudin Idrus I Wayan Warmada M. Syaifudin Muhammad Zelandi Nashar Utamajaya, Joy Robertus Ila Bakho Siregar, Yusmansyah