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All Journal Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil Jurnal SOLMA PERENNIAL Jurnal Kecerdasan Buatan dan Teknologi Informasi De Facto: Journal of international multidisciplinary sciences
Tahrir, Muhammad
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Religion Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Engineering Environmental Science Languange, Linguistic, Communication & Media Social Sciences Transportation Other

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Rancang Bangun Mesin Press Serbuk Kayu Pembuatan Papan Partikel Sebagai Sarana Penunjang Kegiatan Praktikum: Design and Construction of a Wood Powder Press Machine For Making Particle Board as a Supporting Means For Practical Activities SUKMA, DODI; Tahrir, Muhammad; Santosa; Kurniawan, Dedy; Suryadi; Astuti, Soleha; Famela, Vidya
PERENNIAL Vol 20 No 1 (2024): Vol. 20 No. 1, April 2024
Publisher : Forestry Faculty of Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24259/perennial.v20i1.30787

Abstract

This research activity studies the design of particle board press machines using iron plate materials and manual labor-based hydraulic presses. This research aims to produce a work tool that can facilitate the continuity of processing sawdust into particle boards so that practical activities can be carried out effectively and efficiently while still paying attention to the values determined in the practicum. The research method is carried out using the study of existing tools and will be made another tool with more straightforward work by analyzing the factors of weakness in existing tools. The working mechanism of the sawdust press machine to be made is manual, using human power, and the sawdust press machine is intended for practical student activities in the laboratory.
PEMANFAATAN SURVEI GEOLISTRIK DAN GEOTEKNIK UNTUK IDENTIFIKASI STRUKTUR BAWAH PERMUKAAN RENCANA JALAN LINGKAR POLITEKNIK PERTANIAN NEGERI SAMARINDA SM, A. Arifin Itsnani; Tahrir, Muhammad; Ridwan, Ridwan; Akshar, Muhammad; Barus, Mika Debora Br; Sutadji, Ahmad Aris Mundir
Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil Vol. 29 No. 2 (2024): Wahana Teknik Sipil
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/wahanats.v29i2.6162

Abstract

Soil conditions with weak zone points can cause damage to road structures such asland subsidence. Geoelectric surveys can identify subsurface structures based onvariations in rock resistivity. Road infrastructure crash due to weak zones of soilbearing capacity can be identified by geoelectric surveys and geotechnical tests assupporting analysis. Based on the master plan of Politani Samarinda 2025-2029 inthe southern area, a ring road of ± 1.5 km will be built, so geoelectric andgeotechnical support data are first needed as a basis for road planning. The mainobjective of this study is to mapping subsurface structure and identify the stability ofthe strong and weak zones of the soil in the planned area of the ring roadconstruction. The geoelectric resistivity survey uses the Wenner Schlumbergerconfiguration with 2 longitudinal tracks of ± 100 m per track with a spacing (a) of 5m which can identify the distribution of subsurface resistivity values laterallymapping.The resistivity value obtained from 2D geoelectric inversion is the lowestvalue of 2.62 ohm.m which is suspected as clay, medium 78.5 ohm.m which issuspected as sand, and the highest 7716 ohm.m which is suspected as sandstoneand used as a reference in the strong zone of the road building foundation.Furthermore, the USCS classification geotechnical test at 2 track points resulted insand (SM) and silt clay (MH) soil types based on mechanical laboratory tests. Theresults of the identification of geoelectric surveys and geotechnical tests have asignificant correlation with road construction that has a potential strong zonebearing capacity because the top soil is in the form of silt, clay, sand which isunderneath in the form of sandstone which is strong enough to withstand the load ofroad construction.
MACHINE LEARNING-BASED CLASSIFICATION OF SPACE TRAVEL ELIGIBILITY USING SUPPORT VECTOR MACHINE, RANDOM FOREST, AND XGBOOST Zahroni, Teguh Rizali; Imran, Bahtiar; Tahrir, Muhammad; Muh. Akshar; Marroh, Zahrotul Isti’anah
Jurnal Kecerdasan Buatan dan Teknologi Informasi Vol. 4 No. 2 (2025): May 2025
Publisher : Ninety Media Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69916/jkbti.v4i2.310

Abstract

This study applies machine learning classification techniques to predict passenger displacement events based on corrupted data retrieved from a hypothetical interstellar spacecraft mission. Using a cleaned and preprocessed dataset containing demographic, behavioral, and exposure-related features, we compare the performance of three classification models: Random Forest, Support Vector Machine (SVM), and XGBoost. Each model is trained on 80% of the data and evaluated on the remaining 20% using precision, recall, f1-score, and accuracy metrics. The SVM model shows the most notable improvement after feature selection, achieving a balanced performance across metrics. Meanwhile, Random Forest and XGBoost models maintain consistent and robust accuracy above 80% on both training and testing sets. Feature importance analysis also supports the interpretability of the models, particularly in Random Forest and XGBoost. The comparative analysis demonstrates that ensemble-based methods such as Random Forest and XGBoost are more effective in handling the complexity of the dataset, making them suitable for predictive tasks in high-dimensional, partially incomplete data scenarios.
Peningkatan Produksi Kompos Biochar Pembenah Tanah melalui Rekayasa Konstruksi Mesin Pencacah Bahan Organik dalam Mendukung Adaptasi dan Mitigasi Perubahan Iklim Pertanian bagi Masyarakat Kampung Belimau-Kelurahan Lempake, Kelurahan Sempaja Utara, Kota Samarinda Syafii, Syafii; Zarta, Abdul Rasyid; Akshar, Muh; Marroh, Zahrotul Isti'anah; Nurmarini, Eva; Patulak, Ita Merni; Alex, Taman; Tahrir, Muhammad; Zahroni, Teguh Rizali; Yusdiansyah, Yusdiansyah; Ridwan, Ridwan; Azzahrah, Nadia Fatimah
Jurnal SOLMA Vol. 14 No. 2 (2025)
Publisher : Universitas Muhammadiyah Prof. DR. Hamka (UHAMKA Press)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22236/solma.v14i2.17412

Abstract

Background: Berkuranganya lahan subur, cekaman alam dan biotik terhadap lahan pertanian di Kalimantan Timur menuntut tindakan adaptasi yang bermuara pada peningkatan produktivitas dan keberlanjutan usaha pertanian. Adaptasi dan keberlanjutan menuntut inovasi kreativitas yang didasarkan riset, dengan adanya kegiatan produksi kompos biochar menggunakan mesin pencacah maka kuantitas hasil produksi akan semakin bertambah yang akan berpengaruh pada jumlah dan kualitas hasil pertanian. Tujuan dari kegiatan pengabdian ini adalah untuk memberikan pemahaman kepada masyarakat mengenai upaya peningkatan produksi kompos biochar pembenah tanah melalui rekayasa konstruksi mesin pencacah bahan organik. Mitra pada kegiatan pengabdian ini adalah Lembaga Swadaya Masyarakat (LSM) P4S Puri Leisa. Metode: Untuk mengatasi permasalahan maka diadakan penyuluhan dan pelatihan terhadap 15 – 20 orang petani dan mahasiswa, dengan materi teori dan praktek pembuatan kompos biochar selama 1 hari (4 jam) antara lain Penyiapan Alat Pirolysis, Pemilihan Bahan Biochar, Proses Pembakaran, Pemantauan Suhu dan Pemadaman, Penjemuran, Aktivasi dan Penepungan, Analisis dan Distribusi.  Hasil: Pada tahap awal kegiatan pengabdian, para peserta pelatihan mendapatkan kulsponsi penjelasan prosedur cara membuat kompos biochar dari instruktur. Tahap kedua adalah praktik dengan memasukkan bahan-bahan organik yang berasal dari limbah pertanian dan serasah kehutanan ke mesin pencacah untuk menghasilkan serbuk yang seragam sebelum akhirnya diproses menjadi biochar.  Limbah pertanian serta limbah kehutanan atau limbah alami organik lainnya tidak membutuhkan perlakuan khusus maupun perlakuan pendahuluan seperti dengan menjemurnya atau membuatnya menjadi bagian-bagian dengan ukuran lebih kecil. Kesimpulan: Melalui penggunaan mesin pencacah bahan alami, produktivitas kompos meningkat menjadi 800 kg per hari dibandingkan sebelumnya hanya berkisar 100-200 jika menggunakan tenaga manual. 
COST PERFORMANCE ANALYSIS OF INTEGRATED LABORATORY BUILDING CONSTRUCTION BASED ON BUDGET VARIANCE ANALYSIS Tahrir, Muhammad; Teguh Rizali Zahroni; Muh. Akshar; Risna Nona
DE FACTO : Journal Of International Multidisciplinary Science Vol 3 No 02 (2025): DE FACTO : Journal Of International Multidisciplinary Science
Publisher : Pusat Studi Ekonomi, Publikasi Ilmiah dan Pengembangan SDM

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62668/defacto.v3i02.2399

Abstract

This study examines the cost performance of the Integrated Laboratory Building construction project by comparing the 2023 and 2025 Cost Budget Plans (Rencana Anggaran Biaya/RAB). The objective is to identify cost variances in each major work category and evaluate the efficiency of budget utilization. A descriptive quantitative approach was employed using official RAB documents from both periods as the primary data source. Variance analysis was conducted by calculating absolute and percentage differences between the estimated and contract values. The results indicate that the total budget in 2025 decreased by IDR 1.35 billion (2.91%) compared with the 2023 estimate. Significant cost increases occurred in electrical panel works (430.3%) and plumbing systems (152.7%), while the greatest efficiencies were achieved in façade works (13.6%) and air-conditioning systems (13.8%). Overall, the 2025 contract value achieved an efficiency level of 97.09% relative to the estimated budget, indicating good and efficient cost performance in project implementation.
Co-Authors Akshar, Muh Akshar, Muhammad Alex, Taman Astuti, Soleha Azzahrah, Nadia Fatimah Famela, Vidya Imran, Bahtiar Ita Merni Patulak MARIA BINTANG Marroh, Zahrotul Isti'anah Marroh, Zahrotul Isti’anah Mika Debora Br Barus Muh. Akshar Nurmarini, Eva Ridwan, Ridwan Risna Nona Santosa SM, A. Arifin Itsnani Sukma R.A, Dodi Suryadi Sutadji, Ahmad Aris Mundir Syafii . Teguh Rizali Zahroni Yusdiansyah, Yusdiansyah Zahroni, Teguh Rizali Zarta, Abdul Rasyid