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Empirical Analysis of the Impact of Labor Coefficients on Column Reinforcement Productivity in Construction Projects
Advance Sustainable Science, Engineering and Technology (ASSET)
Vol 7
, No 4
(2025)
Construction productivity, particularly in column reinforcement, is significantly influenced by labor as a key project component. Variations in labor coefficients determine efficiency in time, cost, and work quality, necessitating empirical analysis of their impact on productivity. This study examines the relationship between labor coefficients and column reinforcement productivity to improve construction project management efficiency. Using a quantitative approach with purposive sampling, 33 ob...
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Systemic Model of Driver Fatigue on Extreme Routes: PLS-SEM Analysis of Supervisor Support and Organizational Justice
Advance Sustainable Science, Engineering and Technology (ASSET)
Vol 7
, No 4
(2025)
Driver fatigue is a critical safety concern for long-distance bus operations, particularly on the extreme route of Bima–Mataram. The study examines the impact of supervisor support and perceived penalty fairness on drivers' compliance with rest periods and levels of fatigue. Data from 114 drivers were analyzed using Partial Least Squares Structural Equation Modeling (PLS-SEM) and Importance–Performance Map Analysis (IPMA). The results indicate that supervisor support positively affects rest comp...
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The Effect of Working Hours of The Ship's Main Engine on The Temperature of The Fresh Water Cylinder Cooling System In Diesel Engines
Majalah Ilmiah Momentum
Vol 21
, No 2
(2025)
Main propulsion engines on commercial ships are generally of the diesel type, necessitating precise and stable thermal conditions for efficient operation. To ensure this thermal stability, the engine's cylinders are equipped with a dedicated freshwater cooling system. The primary objective of this study was to ascertain the correlation between fluctuating operating hours and temperature variations within the engine's cylinder cooling system. The resulting data will inform the establishment of a...
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Sistem Pengendalian Suhu Otomatis pada Modul Termoelektrik Generator untuk Pembangkit Listrik Berbasis Panas Kompor Oli Bekas dengan Motor Stepper
Majalah Ilmiah Momentum
Vol 21
, No 2
(2025)
Pemanfaatan energi alternatif penting untuk mengurangi ketergantungan pada fosil. Panas dari kompor oli bekas dapat dikonversi menjadi listrik melalui Thermoelectric Generator (TEG). Namun, suhu berlebih pada sisi panas TEG menurunkan efisiensi dan mempercepat kerusakan modul. Karena itu, diperlukan sistem pengendalian suhu agar kinerja dan umur pakai TEG tetap optimal. Penelitian ini bertujuan untuk merancang dan mengimplementasikan sistem pengendalian suhu otomatis pada modul TEG berbasis mikr...
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Penerapan Decission Support Sistem menggunakan Metode Multi Objective Optimization On The Basis Of Ratio Analysis pada Seleksi Penerimaan Taruna di UNIMAR AMNI Semarang
Jurnal Universal Technic (UNITECH)
Vol 4
, No 2
(2025)
The selection process for prospective cadets at a maritime college is routinely carried out every year. In the current system, the processing and calculation of prospective cadet scores uses Microsoft Excel tools, but this takes a long time and can lead to errors in the calculation of scores and the recapitulation of selection results. In addition, unintegrated data can lead to data duplication, resulting in inaccurate selection results that can be detrimental to prospective cadets. A fast, prec...
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SINTESIS MEMBRAN AKRILONITRIL BUTADIENA STIRENA TERMODIFIKASI FILLER SULFONASI GRAFENA OKSIDA TEREDUKSI DAN CERIUM OKSIDA
Iskandar, Riska Listiarini
; Dampang, Sarah
; Hakim, Muhammad Fahmi
; Perdani, Meka Saima
; Siswantito, Firgi
; Widianto, Eri
; Fauji, Najmudin
Jurnal Inovasi Teknik Kimia
Vol 10
, No 4
(2025)
The utilization of Acrylonitrile Butadiene Styrene (ABS) polymer as an alternative membrane for Direct Methanol Fuel Cell (DMFC) applications has been investigated. This study aims to evaluate the effect of sulfonation temperature on the performance of ABS membranes modified with reduced graphene oxide/cerium oxide (s-rGO/CeO₂). The membranes were synthesized via sulfonation at 65 °C, 75 °C, and 85 °C, with a filler composition of 3% v/v. The results indicate that the addition of filler signific...
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STUDI EKSPERIMEN PENGARUH JENIS DAN ARAH PENEMPATAN SERAT MATERIAL KOMPOSIT BERMATRIKS UNSATURATED POLYMER RESIN (UPR) TERHADAP NILAI IMPAK DAN SIFAT FISIK
Jurnal Inovasi Teknik Kimia
Vol 10
, No 4
(2025)
Biokomposit merupakan salah satu upaya untuk isu global lingkungan saat ini, dimana jenis material ini berasal dari bahan dasar organik dan lebih mudah terurai saat menjadi limbah. Penelitian ini berfokus pada pembuatan biokomposit dengan serabut kelapa dan daun nanas sebagai penguat dan Unsaturated Polymer Resin (UPR) sebagai matriks. Biokomposit dibuat menjadi dua spesimen dengan perbedaan fraksi volume yakni 10% serat + 90% matriks dan 15% serat + 85% matriks dengan 2 jenis arah penempatan ya...
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PROSES PEMUCATAN CRUDE PALM OIL DENGAN RECOVERY REACTIVATED SPENT BLEACHING EARTH (RSBE)
Jurnal Inovasi Teknik Kimia
Vol 10
, No 4
(2025)
Spent Bleaching Earth (SBE) merupakan limbah besar dari industri minyak kelapa sawit yang terbentuk selama proses pemurnian di refinery plant dan dipisahkan melalui proses filtrasi di niagara filter. SBE masih mengandung minyak sebanyak 20-40%, yang dapat dimanfaatkan kembali. Penelitian ini bertujuan untuk mengetahui pengaruh aktivasi SBE, kualitas asam lemak bebas, bilangan peroksida dan warna pada Crude Palm Oil yang telah dilakukan bleaching menggunakan karbon aktif RSBE. SBE direndam denga...
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Unveiling the Link Between Numeracy Skills and Self-Efficacy: A Study on Physics Learning Through AKM Assessments
Jurnal Penelitian Pembelajaran Fisika
Vol 16
, No 4
(2025)
This study explores the relationship between numeracy skills and self-efficacy among grade 10 students within the context of the Minimum Competency Assessment (AKM) in physics, focusing on linear and parabolic motion. Employing a quantitative descriptive design, the research involved 140 students from a public high school in Bekasi, Indonesia. Instruments included a numeracy test comprising 17 AKM-based physics questions and a self-efficacy questionnaire adapted from Bandura's framework, coverin...
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Development of E-Worksheets Discovery Learning Model Assisted by Augmented Reality for Renewable Energy Topic
Jurnal Penelitian Pembelajaran Fisika
Vol 16
, No 4
(2025)
The poor motivation and interest of students in learning physics which is frequently viewed as challenging and less interesting led to the conduct of this study. As a result, creating cutting-edge educational materials that may facilitate interactive learning and foster a deeper conceptual grasp is essential. Building an Electronic Student Worksheet on the subject of renewable energy using the Discovery Learning methodology enhanced by Augmented Reality is the aim of this study. The research and...
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