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Effect of Biomass Feedstock Granulometry on Thermophysical Characteristics of Charcoal Briquettes via Screw Extrusion
Samsudin Anis
; Jefri Bale
; Septian Eko Cahyanto
; Ninda Kurniadi
; Fitriyana, Deni Fajar
; M. Thooriq Anwar
; Januar Parlaungan Siregar
; Natalino Fonseca Da Silva Guterres
Advance Sustainable Science, Engineering and Technology
Vol 7
, No 4
(2025)
The present study investigates the impact of particle size variation (10, 18, 20, and 35 mesh) on the physical and thermal properties of charcoal briquettes from coconut shells manufactured with a screw-based extruder machine. The briquette manufacturing process involves crushing, mixing, molding, and drying. Assessments were conducted to ascertain friability, compressive strength, density, calorific value, volatile matter, ash content, fixed carbon, and water content. Comparable assessments wer...
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Hybrid Expert System for Academic Stress Diagnosis Using Forward Chaining and Score Weighting
Advance Sustainable Science, Engineering and Technology
Vol 7
, No 4
(2025)
Academic stress classification is a significant challenge in education, as previous approaches often rely on opaque models or require large training datasets. This study develops a hybrid expert system for academic stress classification using forward chaining and Certainty Factor (CF) score fallback. The system was tested on 100 student cases with the following label distributions: Mild (48), Moderate (37), and High (13), classified independently by three experts. Label validity was tested using...
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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
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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Adaptation and Validation of the Indonesian Version of R.I.G.H.T. Leadership Scale
Advance Sustainable Science, Engineering and Technology
Vol 7
, No 4
(2025)
Leadership has a significant impact on organizational resilience and employee well-being. In accordance with International Test Commission guidelines, this study translated and validated the R.I.G.H.T. Leadership Scale for Indonesian employees. Online information was gathered from 302 workers from various industries (162 men and 140 women, ages 19–41). Psychometric testing, expert review, and forward-backward translation were all part of the adaptation. With over 90% expert agreement, the conten...
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Studi Perencanaan Sistem Kelistrikan pada Gedung Data Center Mmr 4 Deltamas Cikarang Pusat
Majalah Ilmiah Momentum
Vol 21
, No 2
(2025)
Studi ini menata ulang sistem perencanaan kelistrikan gedung Pusat Data MMR 4 Deltamas Cikarang, dengan fokus pada keselamatan dan kenyamanan operasional sesuai SNI, PUIL, dan peraturan kelistrikan. Penelitian diawali dengan wawancara dengan konsultan perencana untuk mendapatkan dimensi bangunan (panjang, lebar, tinggi) serta kebutuhan daya server dan sistem pendingin, dilanjutkan dengan penyesuaian desain instalasi pencahayaan dan kelistrikan. Peralatan pencahayaan terdiri dari berbagai jenis l...
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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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Analisis Kualitas Sambungan Las Kampuh V dan Double V Menggunakan Self Shielded Fcaw pada Baja Karbon Rendah Astm A36 Uji Dpt, Tarik dan Bending
Jurnal Universal Technic (UNITECH)
Vol 4
, No 2
(2025)
This research was conducted to evaluate the weld joint quality of V-groove and double V-groove configurations on ASTM A36 low carbon steel using the Self Shielded Flux-Cored Arc Welding (FCAW-SS) method. ASTM A36 was selected as the base material due to its favorable mechanical properties, excellent weldability, and wide application in construction and manufacturing. The welding process was carried out on steel plates with a thickness of 10 mm using E71T-1C wire, under controlled parameters of 1...
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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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Web-Based Sales Promotion Information System for Subsidized Housing at Mutiara Garden Housing Complex
Fajrina, Isra
; Putra, Firmansyah
; Yusran, Yusran
; Fajrina, Isra
; Putra, Firmansyah
; Yusran, Yusran
JUISI : Jurnal Ilmiah Sistem Informasi
Vol 4
, No 1
(2025)
Promotion and provision of information on subsidized housing for low-income communities (MBR) is still carried out conventionally, such as throught brochures, banners or exhibitions. This method is considered less effective in reaching the wider community, especially the younger generation who are more familiar with digital technology. This research aims to design and create a web-based information system for sales promotion of subsidized housing at Mutiara Gerden Housing. This system is expecte...
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SINTESIS DAN KARAKTERISASI FOTOKATALIS NANO TIO2-MEMBRAN POLIURETAN BERBASIS MINYAK ALPUKAT, HDI, DAN POLYETHYLENE GLYCOL (PEG) PADA FOTODEGRADASI METIL JINGGA
Jurnal Inovasi Teknik Kimia
Vol 10
, No 4
(2025)
Synthetic dyes such as methyl orange are classified as persistent pollutants that are difficult to degrade biologically, thus requiring effective and sustainable treatment technologies. This study develops a photocatalytic membrane based on polyurethane (PU) synthesized from avocado seed oil, hexamethylene diisocyanate (HDI), and polyethylene glycol (PEG) for immobilizing TiO₂ nanoparticles. PEG was used as a dispersing additive to prevent TiO₂ agglomeration and enhance the membrane's hydrophili...
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