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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
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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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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PENGOLAHAN LIMBAH TEKSTIL (METHYLENE BLUE) MENGGUNAKAN ADSORBEN KARBON AKTIF KULIT MANGGIS (GARCINIA MANGOSTANA) TERAKTIVASI HIDROGEN PEROXIDE
Jurnal Inovasi Teknik Kimia
Vol 10
, No 4
(2025)
Textile wastewater is a major contributor to aquatic pollution because synthetic dyes such as Methylene Blue (MB) are toxic, persistent, and resistant to biodegradation. This study investigates the adsorption performance of activated carbon derived from mangosteen peel (Garcinia mangostana) activated with hydrogen peroxide (H₂O₂) for MB removal from aqueous solution. Activated carbon was prepared by carbonization at 850 °C, followed by chemical activation with diluted 50% H₂O₂. Adsorption tests...
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SYNERGISTIC INTERFACIAL CHEMISTRY OF HUMIC ACID AND ACTIVATED FLY ASH FOR HIGH-PERFORMANCE Mn²⁺ ADSORPTION
Susparini, Ninik Triayu
; Ramadhan, Alamsyah Sultan
; Aferta, Lusi
; Benu, Marlon Jusak Renaldy
; Wijayanti, Sri
; Tantowi, Ali
Jurnal Inovasi Teknik Kimia
Vol 11
, No 1
(2025)
This study developed a hybrid adsorbent derived from activated fly ash (FA) and humic acid (HA) for effective Mn²⁺ removal from aqueous solutions. Fly ash was activated using 1 M NaOH to increase its surface hydroxyl groups (≡Si–OH and ≡Al–OH) and enhance reactivity. The activated FA was then composited with HA, which contains abundant –COOH and –OH groups, forming an inorganic–organic hybrid with improved adsorption capability. The HA–FA composite with a 1:3 mass ratio exhibited the highest Mn²...
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Development of A Multidimensional Assessment Instrument on the Topic of Torque
Jurnal Penelitian Pembelajaran Fisika
Vol 16
, No 4
(2025)
This research focuses on the development of a multidimensional assessment instrument aimed at evaluating high school students’ learning outcomes in the topic of torque within physics education. The instrument integrates cognitive, affective, and psychomotor domains through a combination of multiple-choice questions for conceptual understanding and Likert-scale questionnaires for assessing students’ interest and communication skills. The development process followed a systematic model consisting...
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Pengaruh Partisipasi Penyusunan Anggaran dan Motivasi Kerja Terhadap Kinerja Manajerial dengan Gaya Kepemimpinan sebagai Variabel Moderating
EBISNIS : JURNAL ILMIAH EKONOMI DAN BISNIS
Vol 18
, No 2
(2025)
The Karanganyar Regency Government functions as an autonomous region comprising various work units, including offices, agencies, and departments. This study aims to examine the influence of budget participation and work motivation on managerial performance, and to analyze the moderating role of leadership style within this relationship in the Regional Government Work Units (SKPD) of Karanganyar Regency.
This research employed a quantitative approach, utilizing primary data as its main source. Th...
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Analisis Penerapan Social Media Marketing di Lafera Space Pekanbaru
EBISNIS : JURNAL ILMIAH EKONOMI DAN BISNIS
Vol 18
, No 2
(2025)
Lafera Space is a coffee shop located in Bangau Sakti, Pekanbaru. This study aims to obtain clear information and insights into the implementation of social media marketing strategies at Lafera Space Pekanbaru. The research approach used is a descriptive qualitative method that describes how Lafera Space conducts social media marketing. Data collection was conducted through interviews with seven informants, documentation study, literature review, and data source triangulation. The research findi...
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Empowerment of the Sanggang Village Community Through Training on Coconut Sap Processing and Making Ant Sugar-Based Sponge
Indonesian Journal of Empowerment and Community Service
Vol 6
, No 2
(2025)
Sanggang Village is one of the areas where dwarf coconuts are widely planted, managed by the Karya Makmur farmer group (gapoktan). The young coconut trees can be tapped for sap, which can then be processed into palm sugar as an alternative to granulated sugar. However, the farmer group in Sanggang Village still does not understand the potential of coconut sap and its processing. Therefore, the purpose of this community service is to provide understanding and competency to the farmer group in San...
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