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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 (ASSET)
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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Entrepreneurship Training as well as Environmental Conservation for Junior High School Students through Ecoprint
Indonesian Journal of Empowerment and Community Service
Vol 6
, No 2
(2025)
One of the P5 projects on the theme of entrepreneurship is Ecoprint, which is a natural batik art using plant parts as the basic material, and if done seriously, this batik art can generate income for its maker. The purpose of this service is to provide understanding through ecoprint training to students of SMP Muhammadiyah 1 Kartasura because of its relevance to the P5 subject on the theme of entrepreneurship. The method of this service is through lectures and direct practice of making ecoprint...
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Hybrid Expert System for Academic Stress Diagnosis Using Forward Chaining and Score Weighting
Advance Sustainable Science, Engineering and Technology (ASSET)
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 (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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AI-Enabled CTAS and Digital Tax-Fraud Detection: A PLS-SEM Study in Indonesia
Advance Sustainable Science, Engineering and Technology (ASSET)
Vol 7
, No 4
(2025)
This study investigates the factors determining digital tax fraud based on the New Fraud Star Theory, with great emphasis on the moderating role of AI-empowered CTAS. Data were collected from 107 corporate taxpayers in Indonesia through a structured survey and analyzed using Partial Least Squares Structural Equation Modeling. The results indicated that System Pressure, Technological Capability, and External Digital Pressure significantly heightened fraud attempts, while Digital Opportunity, AI R...
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Empowerment Strategy of Farmers through Biogas Utilization to Achieve Energy Self-Sufficiency Village
Bantara Journal of Animal Science
Vol 7
, No 2
(2025)
The empowerment of livestock farmers through the utilization of cow manure biogas plays a crucial role in addressing environmental pollution and enhancing rural energy self-sufficiency. This study aims to analyze the empowerment strategy of farmer groups (KTT) in Sruni Village, Musuk District, Boyolali Regency, Central Java, Indonesia, through a participatory biogas utilization program. A survey method using Participatory Rural Appraisal (PRA) was employed with 45 respondents determined by censu...
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The Effect of Young Timor Deer (Rusa timorensis) Hornbill Flour Supplementation on the Testicular Size of Male Wistar Rats (Rattus norvegicus)
Kartika, Nur Hafidzah Devi
; Samsudewa, Daud
; Prasetya, Nor Basid Adiwibawa
; Nandhirabrata, Raditya
Bantara Journal of Animal Science
Vol 7
, No 2
(2025)
The processing of young deer antlers exemplifies the use of deer as wildlife, guided by the principle of continuity and without harming them. The purpose of this study was to determine the effect of young Timor deer antler meal and to determine the impact of its supplementation on the size of the testes of male Wistar rats. Twenty male Wistar rats with a body weight of 200–250 g and an age of 90 days were used. The samples were divided into four groups: a control group and three treatment groups...
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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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Rancang Bangun Sistem Kemudi Rack And Pinion dan Suspensi Independent Double Wishbone Mobil Listrik Formula E Politeknik Baja Tegal
Majalah Ilmiah Momentum
Vol 21
, No 2
(2025)
Sistem Kemudi dan Suspensi merupakan komponen terpenting dalam sebuah kendaraan untuk menselaraskan, menyeimbangkan dan memaksimalkan kinerja mobil tersebut agar dapat berjalan dengan baik, aman dan nyaman. Meskupin sistem kemudi rack and pinion dan suspensi independent double wishbone sudah ada sejak lama, namun masih masih banyak yang perlu diatasi dan diinovasikan, seperti tingkat kenyamanan, responsifitas, keamanan, keterbatasan kontrol pengguna dan kesulitan untuk mengatasi rintangan yang l...
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HUMIC ACID FILTRATION EFFICIENCY OF POLYPROPYLENE-BASED ULTRAFILTRATION MEMBRANES
Jurnal Inovasi Teknik Kimia
Vol 10
, No 4
(2025)
Polypropylene (PP) membranes exhibit advantageous characteristics for filtration processes, including chemical resistance, thermal stability, hydrophobicity, low cost, and mechanical durability, making them well-suited for long-term applications in water treatment, particularly for removing organic compounds. This study aims to evaluate the performance of hollow fiber PP membranes in the ultrafiltration of humic acid solutions, serving as a model organic contaminant. The experimental setup invol...
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