Penelitian ini bertujuan memodelkan dan menginterpretasikan komponen sistem panas bumi di daerah Danau Ranau dan sekitarnya menggunakan data gravitasi GGMPlus sebagai pendekatan geofisika nonseismik beresolusi tinggi. Pengolahan dilakukan melalui reduksi medan gravitasi hingga diperoleh anomali Bouguer lengkap, kemudian komponen regional dan residual dipisahkan dengan metode kontinuasi ke atas …
The implementation of the MyPertamina application as a means of distributing subsidized fuel has triggered various responses from the public. User reviews on the Google Play Store platform serve as a vital data source that can be utilized to analyze public satisfaction. This study aims to classify the sentiment of MyPertamina application user reviews into positive and negative classes using the…
Land preparation activities in Industrial Plantation Forests (HTI) require heavy equipment to improve the effectiveness and efficiency of soil processing. The Komatsu D85E-SS Bullripper is used to loosen the soil and prepare planting rows. This study aimed to determine the operational costs and financial feasibility of using the Bullripper at PT Musi Hutan Persada. The research method used was …
Land preparation in the Industrial Forest Plantation (HTI) sector demands high mechanization efficiency to overcome challenges posed by complex topography and extreme soil compaction. PT Musi Hutan Persada utilizes a bullripper unit as a primary support for disc plow operations during primary tillage. This study aims to evaluate the work efficiency of such plowing operations through the analysi…
Scientific digital documents often contain crucial information presented in the form of isolated mathematical expressions. Conventional Convolutional Neural Network (CNN)-based object detection methods, such as Faster R-CNN and YOLO, generally rely on manual components like anchor boxes and Non-Maximum Suppression (NMS) processes, which limit the model's flexibility regarding complex visual str…
Repetitive manual work activities performed without ergonomic consideration have the potential to cause musculoskeletal disorders among workers, particularly in the food micro-enterprise sector where traditional production methods are still widely practiced. This study analyzed the working posture of three experienced workers in the kerupuk forming process at UMKM Tiga Saudara using the Kinovea…
The structure of a current aircraft is composed of 80% aluminum and 20% composites. Aluminum is a non-ferrous metal known for its corrosion resistance and light weight. Furthermore, aluminum alloys are easy to manufacture and have a high strength-to-weight ratio (GMF, 2018). An aircraft requires lightweight materials to reduce weight and improve fuel efficiency. Structural corrosion that occurs…
Air tanah merupakan sumber daya vital, khususnya di daerah yang berada di luar sistem Cekungan Air Tanah (CAT) utama. Daerah Sukomoro dan sekitarnya di Kabupaten Banyuasin, Provinsi Sumatera Selatan merupakan wilayah non-CAT dengan kondisi hidrogeologi yang kompleks, didominasi akuifer bebas hingga semi-tertekan yang terbentuk pada Formasi Talangakar, Formasi Gumai, Formasi Airbenakat, dan Enda…
Daerah penelitian berada di Bumi Genap dan sekitarnya, Kabupaten Ogan Komering Ulu Selatan, Sumatera Selatan, yang termasuk dalam Formasi Garba (Kjg). Wilayah ini didominasi oleh batuan beku vulkanik berupa basalt yang belum banyak dikaji terkait petrogenesis dan lingkungan tektoniknya. Penelitian ini bertujuan untuk mengidentifikasi karakteristik petrografi, menentukan afinitas magma melalui a…
Penelitian ini membahas kerawanan banjir bandang pada Sub-DAS Way Komering dan Air Gilas di Kabupaten Ogan Komering Ulu Selatan, Sumatera Selatan. Kajian ini dilakukan karena daerah penelitian memiliki kondisi fisik yang mendukung terjadinya banjir bandang, seperti topografi perbukitan, jaringan sungai yang berkembang, variasi litologi, kondisi geomorfologi yang beragam, serta potensi bahaya ta…
This study is motivated by the presence of igneous intrusions within the coal mining area of Pit A, PT Bukit Asam Tbk., Tanjung Enim, South Sumatra, which potentially affect coal quality and rank within the Muara Enim Formation. Intrusions such as sills and dikes can alter the physical and chemical characteristics of coal through thermal metamorphism, making it important to understand their imp…
Pabrik pembuatan bahan asam sulfat dengan kapasitas 270.000 ton/tahun direncanakan untuk berdiri pada tahun 2028 di Desa Sumber Arum, Kecamatan Kerek, Kabupaten Tuban, Jawa Timur, dengan perkiraan luas area pabrik seluas 5 ha. Proses pembuatan senyawa ini mengacu kepada paten dengan nomor WO2023097389. Bahan baku yang digunakan yaitu flue gas dengan bantuan katalis Vanadium Pentaoksida (V2O5). …
Pabrik pembuatan Butil Asetat dengan kapasitas produksi 45.000 ton/tahun direncanakan akan berdiri pada tahun 2032 di kawasan industri JIIPE, Gresik, Jawa Timur dengan luas 2,4347 ha. Butil Asetat pada pabrik ini disintesis dari bahan baku Butanol dan Asam Asetat dengan katalis Amberlyst-15 di dalam fixed bed reactor berdasarkan Patent CN 117843478 A. Reaksi berlangsung pada temperatur 130 oC d…
Honkai Star Rail adalah sebuah game populer yang dikembangkan oleh Hoyoverse dengan sistem pertarungan turn-based RPG. Turn-based RPG dijalankan dengan penentuan giliran dilakukan setelah karakter menyelesaikan aksinya dan pemain harus memilih aksi disetiap giliran. Fuzzy logic merupakan salah satu dari metode pengambilan keputusan yang menggunakan nilai linguistik sebagai input dan memberikan …
Kuningan merupakan paduan tembaga dan seng yang banyak digunakan dalam industri otomotif, kelistrikan, dan manufaktur karena memiliki sifat mekanik yang baik serta ketahanan terhadap korosi. Namun, material ini rentan mengalami kegagalan akibat beban berulang atau fatik. Penelitian ini bertujuan menganalisis pengaruh perlakuan panas Uji Fatik Lengkung dari Material Kuningan yang Mendapatkan ter…
Automatic classification of eye diseases (cataract, glaucoma, and diabetic retinopathy) is often constrained by low contrast and illumination bias in retinal fundus images. This research aims to analyze the effect of the Contrast Limited Adaptive Histogram Equalization (CLAHE) method on color space variations to improve the accuracy of the EfficientNet-B0 deep learning architecture. The evaluat…
Drying is an important stage in the processing of snakehead fish crackers because it affects moisture content, product quality, and shelf life. Traditional drying methods are still widely used; however, they have limitations due to dependence on weather conditions and the risk of contamination. Therefore, the use of a rack-type dryer with an electric heater can be an alternative to provide a mo…
Sleep disorders negatively impact rest quality and daily productivity. This study develops a classification model for sleep disorders using Machine Learning based on physiological conditions and lifestyle factors. The dataset consists of 15,000 records from Kaggle with balanced distribution across three categories: Healthy, Insomnia, and Sleep Apnea. Four algorithms were tested: Decision Tree, …
Suboptimal land in South Sumatra has great potential for agricultural development, but its utilization is still constrained by water management and soil fertility, so adaptive cultivation technology is needed. The Arduino Uno R3 based floating raft system is an alternative cultivation that is able to maintain the stability of the growing environment by monitoring the temperature and humidity of…
ANANDA VARISSA AULIYA ANANTA. Performance Test of Coconut Husk Decomposer Blade on Semi-Automatic Machine Type G50-BRT (Supervised by TAMARIA PANGGABEAN). The performance test of the coconut husk decomposer blade on the semi-automatic machine type G50-BRT has been conducted. Coconut husk is an agricultural waste that can be utilized into valuable products such as Cocopeat, Cocofiber, and cocobr…
Peat soil has low bearing capacity, high compressibility, and low shear strength, requiring soil improvement before being used as a construction foundation. One of the methods used is the Geosynthetic Encased Stone Column (GESC), which is a stone column wrapped with geosynthetic material to increase soil bearing capacity. This study aims to analyze the effect of GESC group formation variations …
The increasing demand for electrical energy encourages the utilization of renewable energy, particularly solar energy; however, the performance of solar panels often decreases due to variations in solar radiation intensity and rising surface temperature. This study aims to evaluate the performance of a 10 Wp polycrystalline solar panel with the addition of a flat mirror reflector and a cooling …
Disertasi ini berfokus pada pengembangan aluminium matrix composite (AMC) berbasis paduan aa6063 dengan penguat hibrida Palm kernel shell ash (PKSA) dan Silikon karbida (sic) menggunakan metode stir–squeeze casting. Amc dipilih karena memiliki bobot ringan, ketahanan korosi baik, serta dapat ditingkatkan sifat mekaniknya melalui penambahan partikel penguat. Penguat keramik sintetis seperti Si…
Pertumbuhan eksponensial publikasi ilmiah menuntut adanya sistem temu kembali informasi yang efisien. Ekstraksi Frasa Kunci memegang peran fundamental dalam meringkas isi dokumen untuk keperluan pengindeksan dan peringkasan. Metode unsupervised berbasis embedding yang ada saat ini, seperti MDERank, memanfaatkan perturbasi semantik untuk mengidentifikasi frasa kunci namun sering kali mengabaika…
Work posture refers to the position or stance of a worker while performing work activities; in the application of ergonomics, assessing work posture is crucial to determine efficiency and the level of risk associated with a job. This study aims to analyze the risk level associated with work postures during the cracker production process at the Tiga Saudara cracker MSME. Work posture analysis wa…
The limitations of the physical properties of ultisol soil, particularly porosity and low water-holding capacity, are one of the main constraints in cultivating vegetable crops, such as spinach (Amaranthus sp.). Efforts to improve these conditions can be carried out through the application of rice husk Biochar as an ameliorant material and by regulating the appropriate watering frequency to inc…
Air merupakan sumber daya vital yang ketersediaannya semakin terancam oleh polusi limbah domestik dan industri. Oleh karena itu, diperlukan teknologi pengolahan yang efektif dan efisien. Studi ini bertujuan untuk menganalisis karakteristik membran Polyethersulfone (PES) yang diinkorporasi dengan perak nitrat (AgNO₃) untuk aplikasi pengolahan air bersih. Membran disiapkan menggunakan 15 wt% PE…
Pabrik pembuatan etil asetat dengan kapasitas produksi 73.000 ton/tahun direncanakan pembangunannya pada tahun 2032 yang berlokasi di Kabupaten Gresik, Jawa timur seluas 4,833 Ha. Operasi pabrik berjalan selama 24 jam/hari dalam 300 hari/tahun. Komoditi etil asetat yang diproduksi mengacu pada Patent WO No. 2024/081921 A2 yang menggunakan proses dehidrogenasi dan hidrogenasi dengan etanol sebag…
PT Bukit Asam (Persero) Tbk., manages a Mining Business License (IUP) covering an area of 40,347 hectares through the Tanjung Enim Mining Unit (UPTE), which encompasses four operational blocks: Banko Barat, Banko Tengah, Muara Tiga Besar, and Tambang Air Laya. This study was conducted at Pit 2, Banko Barat, at the Livestock Dump Hopper 4 (LSDH 4) unit, using an open-pit mining system that invol…
This research was conducted at the Pit Quarry of PT Bukit Asam (Persero) Tbk, specifically in the andesite mining area of Bukit Tapuan, with the objective of analyzing the influence of discontinuity plane orientation on the throw direction and fragmentation size distribution resulting from blasting activities. The research method included field observations using scanline mapping to obtain disc…