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Vol. 6 No. 1 (2026): March-May 2026
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Indonesia (145)
Taiwan, Province of China (2)
Published:
2026-03-10
Articles
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Optimization of Services in Workshops Thanks to The Use of a Website-Based Information System
Novira Wahyuni, Safni Marwa, Hidayati RusnedyShow Abstract | Download PDF | DOI: 10.31004/jestm.v6i1.359 | Check in Google Scholar
The Berkat Yakin Workshop still implements a manual service and data recording system, causing various problems such as difficulties in managing service data, service history, and uncertainty in estimating time and costs for customers. This research aims to optimize services at the Yakin Blessing Workshop through the development of a website-based information system. The system development method used is the Framework for the Application of System Thinking (FAST) with stages of scope definition, problem analysis, requirements analysis, logical design, physical design, construction and testing, and installation and delivery. The system was developed using the Laravel framework with MySQL databases and Unified Modeling Language (UML) modeling. The system test was carried out using Blackbox Testing with the Equivalence Partitioning technique. The results of the study show that the website-based information system is able to improve the operational efficiency of the workshop, make it easier to manage service and customer data, and provide convenience for customers in booking services and obtaining information on estimated costs and processing time. Thus, the system developed is considered to be able to improve the quality of service at the Yakin Blessing Workshop.
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Adaptation and Validation of the Satisfaction With Life Scale (SWLS)
Ni Luh Hita Ekayanti, Muhammad Imanul Haq, Rendi Kurnia Pratma, Nadya Ali Suryani, Yudha Tri Prasetya, Alimatus Sahrah, Anwar AnwarShow Abstract | Download PDF | Check in Google Scholar
Life satisfaction is an individual's cognitive evaluation of their overall quality of life, which is becoming increasingly important to understand in the context of Generation Z working amidst the dynamics of rapid social and technological change. This study aims to adapt and test the psychometric quality of the Indonesian version of the Satisfaction With Life Scale (SWLS) in the working Generation Z population. The study population was Generation Z (born 1997–2012) who worked full- or part-time, with a sample of 301 subjects obtained through accidental sampling techniques. The adaptation process was carried out following the ITC Guidelines for Translating and Adapting Tests, including forward translation, back translation, expert review with an Aiken's V value of 0.70–0.85 for each item, and a readability test. Data analysis involved reliability testing and Confirmatory Factor Analysis (CFA). The results of the reliability test showed good internal consistency with a Cronbach's Alpha value of 0.805. The CFA results confirmed an excellent fit of the single factor OR unidimensional model, with all items loading significantly (Standardized Factor Loading 0.577–0.772), as well as strong model fit indices (CFI = 1.00; TLI = 1.01; RMSEA = 0.00)
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Community Empowerment Based on VCO Oil Production Training in Balamoa Village
Nasim Taha, Adinda Putri Damayanti, Karista Dewi, Nur Afni Syahbani, Fahmi BakirShow Abstract | Download PDF | DOI: 10.31004/jestm.v6i1.372 | Check in Google Scholar
The community service program (KKN) of Alkhairaat University (Unisa) Group 131 in Balamoa Village, Dolo Barat District, Sigi Regency, Central Sulawesi, focuses on the production of Virgin Coconut Oil (VCO). This flagship program was held over two sessions on October 20 and 24, 2025. The activity aimed to enhance the knowledge and skills of local residents, particularly housewives, in processing coconuts into high-economic-value products. The program was implemented using a lecture and hands-on practice method. The results show high enthusiasm among participants and improved understanding of hygienic and marketable VCO production techniques. This activity has the potential to serve as the foundation for sustainable home-based businesses using local coconut resources
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Implementation of a Hazard Reporting System for Work Risk Mitigation at MT. Al Daayen
Muhammad Daffa Maulana, Elise Dwi Lestari, Muh. Dahri, SutoyoShow Abstract | Download PDF | DOI: 10.31004/jestm.v6i1.384 | Check in Google Scholar
Work safety is a critical priority in maritime operations, particularly within the high-risk environment of tanker vessels. In accordance with International Maritime Organization (IMO) regulations, hazard reporting constitutes a fundamental pillar of the Safety Management System (SMS), designed to mitigate risks and foster a proactive safety culture. This study investigates the effectiveness of Hazard Report implementation on the MT. Al Daayen, specifically analyzing its impact on accident prevention behaviors and identifying the obstacles impeding consistent crew participation. Adopting a qualitative descriptive approach, this research utilizes Miles and Huberman’s interactive model to analyze data gathered through structured interviews, direct field observations, and longitudinal documentation reviews. The results demonstrate that the system has significantly enhanced safety culture, evidenced by heightened crew vigilance, consistent PPE adherence, and a measurable decline in near-miss incidents between 2021 and 2024. However, the study reveals that implementation remains suboptimal due to low participation from ratings. The analysis isolates critical barriers: human factors, including a lack of confidence and psychological fears of assigning blame; methodological constraints caused by lengthy, impractical forms; and environmental pressures, where the fast-paced operational tempo compels crew members to prioritize immediate rectification over formal documentation. The study concludes that simplifying reporting mechanisms is essential for ensuring inclusive safety engagement.
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Study of the Characteristics of CLC (Cellular Lightweight Concrete) with the Addition of Rice Husk Ash
Syahrul Ramadhan, Beny Setiawan, Hidayati RusnedyShow Abstract | Download PDF | DOI: 10.31004/jestm.v6i1.400 | Check in Google Scholar
This study aims to analyze the effect of adding rice husk ash on the compressive strength of Cellular Lightweight Concrete (CLC) blocks. The research background is based on the need for building materials that are lightweight, environmentally friendly, and possess adequate mechanical strength. Rice husk ash is used as an additive material due to its high silica content and its potential to enhance the bonding between particles in the lightweight concrete matrix. The research method employed is an experimental method with variations in the addition of rice husk ash of 0%, 2.5%, 5%, and 10% by weight of cement. The test specimens were cube-shaped and were tested at the ages of 7, 14, and 28 days in accordance with SNI 8640-2018. The results indicate that the compressive strength increases with both the concrete age and the percentage of rice husk ash addition up to an optimum limit. At the age of 28 days, the highest compressive strength was obtained at the 10% rice husk ash variation, reaching 3.63 MPa, while the 5% variation produced a compressive strength of 3.33 MPa. Compared to lightweight blocks without the addition of rice husk ash, all variations exhibited a significant increase in compressive strength. Based on these results, it can be concluded that the addition of rice husk ash up to 10% is effective in improving the compressive strength of CLC lightweight blocks and meets the requirements for non-structural lightweight blocks.
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The Effect of Ultrasonic Wave Frequency and Resolution on Image Quality in Ultrasonic Devices
Cinta Nada Cinta, Nani LasiyahShow Abstract | Download PDF | DOI: 10.31004/jestm.v6i1.317 | Check in Google Scholar
Ultrasonography (USG) is a non-invasive medical imaging tool that is widely used in clinical diagnosis due to its safety and ability to visualize internal body structures. This study aims to analyze the effect of ultrasonic wave frequency and resolution on image quality in ultrasound devices. The experiment was conducted at RSUD Petala Bumi, Riau Province, using ultrasound images of four organs, namely the abdomen, cubital joint, prostate gland, and femoral artery. The frequency variations displayed on the ultrasound device were 17, 28, 31, 48, and 93. These values represent internal system preset levels rather than the actual transmitted ultrasonic frequencies. In diagnostic ultrasonography, acoustic waves operate in the megahertz (MHz) range (typically 2–10 MHz). Therefore, in this study, frequency is interpreted as a relative parameter influencing imaging performance, particularly resolution and penetration depth. The images were analyzed using ImageJ software to obtain grayscale histograms as indicators of image quality. The results demonstrate that higher frequency settings improve image resolution but reduce tissue penetration, whereas lower frequency settings provide deeper penetration with reduced resolution. Histogram analysis shows that most images exhibit low brightness intensity with dominant gray-level distributions in darker regions, indicating suboptimal image quality for diagnostic purposes. Therefore, appropriate selection of frequency presets and ultrasound parameter settings is essential to support accurate medical diagnosis.
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Identification and Solutions for Cargo Loss on Self-Propelled Oil Barge (SPOB) Seroja V
Achmad Amin Firmansyah, Sutoyo, Arleiny, Teguh PribadiShow Abstract | Download PDF | DOI: 10.31004/jestm.v6i1.407 | Check in Google Scholar
This study aims to identify the primary causes of cargo loss and to formulate effective solutions to address such losses aboard the Self Propelled Oil Barge (SPOB) Seroja V. The research employs a qualitative method with a descriptive approach to analyze operational discrepancies in the transport of Fatty Acid Methyl Ester (FAME). Data were collected through direct observation during onboard training (PRALA), semi-structured interviews with ship officers and cargo surveyors, and a comprehensive review of loading and discharging documentation. The findings reveal that cargo loss is driven by two distinct but interconnected factors: physical loss, characterized by evaporation, structural leakage, and residue accumulation; and apparent loss, resulting from measurement errors, calculation inaccuracies, and the use of uncalibrated measuring instruments. The study concludes that the unique physicochemical properties of FAME, combined with the aging infrastructure of the barge and the absence of automated monitoring systems, necessitate a robust intervention strategy involving technical remediation of tank integrity, stringent equipment calibration protocols, and the standardization of manual gauging procedures.
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