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Resy Kumala Sari
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resy.sari13@gmail.com
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resykumalasari@jes-tm.org
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LPPM Universitas Pahlawan Tuanku Tambusai Jalan Tuanku Tambusai 23 Bangkinang, Kampar, Riau, Indonesia Kode Pos: 28411
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INDONESIA
Journal of Engineering Science and Technology Management
Published by Universitas Pahlawan Tuanku Tambusai
ISSN : -     EISSN : 28287886     DOI : 10.31004/jestm
Core Subject : Engineering,
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering
Journal of Engineering Science and Technology Management is Jurnal Electronic that aims at the publication and dissemination of original research articles on the latest developments in all fields of engineering science and technology, including; Industrial Engineering, Mechanical Engineering, Material Engineering, Electrical and Electronics Engineering, Environmental Engineering, Civil Engineering, Management, Science, and Technology. Journal of Engineering Science and Technology Management is a International peer-reviewed journal dedicated to interchange for the results of high-quality research in all aspects of education and teaching. The journal publishes state-of-art papers in fundamental theory, experiments, and simulation, as well as applications, with a systematic proposed method, good review of previous works, expanded discussion, and concise conclusion. As our commitment to advancing education and teaching, the Journal of Engineering Science and Technology Management follows the open access policy that allows the published articles to be freely available online without any subscription.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 164 Documents
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Adaptation and Validation of the Satisfaction With Life Scale (SWLS) Ekayanti, Ni Luh Hita; Haq, Muhammad Imanul; Pratma, Rendi Kurnia; Suryani, Nadya Ali; Prasetya, Yudha Tri; Sahrah, Alimatus; Anwar, Anwar
Journal of Engineering Science and Technology Management (JES-TM) Vol. 6 No. 1 (2026): Maret 2026
Publisher : Journal of Engineering Science and Technology Management

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Abstract

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)
Prototype of Water Rise Detection Tool in Kampar River Fish Cages Based on Internet of Things (IoT) Setiawan, Muhammad Bayu; Azriadi, Emon; Musridho, Joko
Journal of Engineering Science and Technology Management (JES-TM) Vol. 6 No. 1 (2026): Maret 2026
Publisher : Journal of Engineering Science and Technology Management

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Abstract

Fish cages, classified as vessels under the Indonesian Shipping Law Number 17 of 2008, must consider safety aspects due to risks such as sinking and drifting. Increasing river discharge causes damage to the cage structures, potentially worsening fish health and causing economic losses for fish farmers. This study aims to develop a water level detection device for fish cages in the Kampar River using Internet of Things (IoT) technology based on waterproof ultrasonic sensors and the ESP32 microcontroller. The device can automatically monitor water levels and provide real-time alerts to cage owners via wireless Wi-Fi or Bluetooth connections. The research uses a Research and Development (R&D) approach. This innovation is expected to help fish cage owners anticipate risks from changes in water levels and improve the management of fish farming operations
Smart Adaptive Traffic Light Prototype Using Ultrasonic Sensors and Arduino Hamdi, Firman; Musridho, Joko; Adeswastoto, Hanantatur
Journal of Engineering Science and Technology Management (JES-TM) Vol. 6 No. 1 (2026): Maret 2026
Publisher : Journal of Engineering Science and Technology Management

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Abstract

Traffic congestion at intersections is often caused by traffic light systems that still rely on fixed timing without taking into account the number of vehicles. The purpose of this study is to create a prototype of a smart traffic light that can adapt automatically using ultrasonic sensors and Arduino. The method applied is Research and Development (RnD) with a prototype approach through the stages of design, assembly, and using a scaled prototype simulation. The results of the testing show that this system is capable of regulating the duration of the green light based on vehicle density, thereby improving the smooth flow of traffic at intersections.
Implementation of a Hazard Reporting System for Work Risk Mitigation at MT. Al Daayen Maulana, Muhammad Daffa; Lestari, Elise Dwi; Dahri, Muh.; Sutoyo
Journal of Engineering Science and Technology Management (JES-TM) Vol. 6 No. 1 (2026): Maret 2026
Publisher : Journal of Engineering Science and Technology Management

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jestm.v6i1.384

Abstract

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.
Operational Performance Analysis of the Talud Tegak Wharf at the Public Port Owned by PT. Pelabuhan Indonesia (PELINDO) Gresik Dwi Surya, Akbar; Dahri, Muhammad; Yudianto, Prima Yudha; Rakhman, Rizqi Aini
Journal of Engineering Science and Technology Management (JES-TM) Vol. 6 No. 1 (2026): Maret 2026
Publisher : Journal of Engineering Science and Technology Management

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jestm.v6i1.405

Abstract

The Public Port of PELINDO Gresik is one of the strategic ports in East Java that functions as a major hub for regional cargo and logistics movement. Talud Tegak Wharf is one of the operational facilities that plays an important role in supporting cargo handling activities, particularly log timber commodities. This study aims to analyze the operational performance of Talud Tegak Wharf in supporting the smooth provision of port services. This research was conducted at Talud Tegak Wharf of the Public Port owned by PT Pelabuhan Indonesia (PELINDO) Gresik over a one-year observation period. The research employed a quantitative method using an operational performance analysis approach. Data were obtained through field observations and port operational records, analyzed then based on operational performance indicators, including vessel arrival trends, berthing time, cargo handling productivity, and berth utilization rate or Berth Occupancy Ratio (BOR). The analysis results were subsequently compared with port operational performance standards specified in the technical regulations of the Directorate General of Sea Transportation. The results indicate that the operational performance of Talud Tegak Wharf is in a good category. The average productivity of log timber cargo handling reached 63.52 m³/hour, exceeding the minimum operational performance standard. Meanwhile, the average BOR value of 82.04 percent indicates a high level of berth utilization while still remaining within safe limits. Overall, the analyzed operational performance indicators demonstrate that Talud Tegak Wharf has met the applicable port operational service performance standards at the Public Port of PELINDO Gresik
Comparison Of LCL Handling Charges At The Container Freight Station (CFS) Line 1 And Line 2 Depots Prasasti, Naiya; Dahri, Muhammad; Yudianto, Prima Yudha; Rakhman, Rizqi Aini
Journal of Engineering Science and Technology Management (JES-TM) Vol. 6 No. 1 (2026): Maret 2026
Publisher : Journal of Engineering Science and Technology Management

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jestm.v6i1.406

Abstract

Less than Container Load (LCL) is defined as cargo whose volume does not fill a full container and its movement requires allocation of LCL handling charges. This study aims to conduct a comparative study of LCL handling charges between Line 1 Container Freight Station (CFS) facilities and Line 2 depot facilities. Differences in operational locations and customs status between Line 1 CFS and Line 2 depots are predicted to cause variations in cost structures that directly affect the efficiency of the logistics supply chain. This study has three main objectives: identifying LCL service procedures, analyzing the development of LCL throughput volume for the period 2021–2024, and comparing LCL handling charges between the two locations. The methodology used is quantitative with a descriptive approach. Data were obtained through observation, interviews, and document studies at the Commercial and Business Development Department. Data analysis involved calculating the Compound Annual Growth Rate (CAGR) to measure volume trends and descriptive comparative analysis to evaluate cost structures. The results show that LCL services are implemented through three main Job Orders: Receiving Service LCL (RSL), MIM, and Delivery Cargo. The LCL throughput trend shows a positive increase with a CAGR of 17.996%. Furthermore, the cost analysis results show that the Line 2 depot charges a higher LCL handling charge, which is around 26%–30% compared to the Line 1 CFS. Thus, the Line 1 CFS is proven to provide a competitive advantage for service users through a more efficient LCL charge handling structure.
The Effect of Variations in the Concentration of Added Butyrum (milk fat) on the Making of Paper Soap and Organoleptic Properties: Sensory Tests and Product Stability Rahmawati, Sri Tria; Haryanto, Haryanto
Journal of Engineering Science and Technology Management (JES-TM) Vol. 6 No. 1 (2026): Maret 2026
Publisher : Journal of Engineering Science and Technology Management

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jestm.v6i1.419

Abstract

This study aims to determine the effect of variations in the concentration of butyrum (milk fat) addition on the quality of paper soap, including organoleptic properties, pH, free alkali, and solubility. Paper soap is made by the hot process method using the main ingredients of VCO, NaOH, distilled water, HPMC, camperlan, 96% ethanol, citric acid, and butyrum with 25 formulation variations. Organoleptic tests are carried out based on observations of color, aroma, texture, and foam volume. The pH test aims to ensure the acidity level of the soap is safe for the skin, the free alkali test is carried out by the titration method, and the solubility test measures the dissolving time of the soap in water. The results show that variations in butyrum concentration affect the physical properties of paper soap, especially the texture and foam produced. The pH value of the soap is in the range of 8–9 with an average of 8.5, thus meeting SNI standards. The free alkali test shows that all formulas are below the maximum limit of 0.1%, so it is safe to use. The dissolution time of the paper soap is in the range of 1–3 minutes, indicating good solubility. Overall, the addition of butyrum has a positive effect on the organoleptic quality and stability of paper soap.
Design Modeling and Aerodynamic Optimization of a Micro-Scale 3-Blade HAWT Wind Turbine at Tip Speed Ratio (λ= 6) Saidah, Andi; Darman, Yahadi
Journal of Engineering Science and Technology Management (JES-TM) Vol. 6 No. 1 (2026): Maret 2026
Publisher : Journal of Engineering Science and Technology Management

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jestm.v6i1.430

Abstract

This study investigates the geometric design and performance estimation of a micro-scale three-blade Horizontal Axis Wind Turbine (HAWT) using a Computer Aided Design (CAD) approach operating at a tip speed ratio (TSR) of λ = 6. The study focuses on low wind speed characteristics obtained from field measurements in the range of 3–8 m/s with an average speed of approximately 5–6 m/s. Micro wind turbines operating under these conditions often experience low aerodynamic efficiency due to low Reynolds numbers and fluctuating airflow. The research methodology includes determining initial turbine parameters with a rotor diameter of 1.5 m, parametric blade modeling using CAD software, and performance estimation using theoretical wind energy equations involving wind power, tip speed ratio, and power coefficient (Cp). Design adjustments were conducted by modifying blade chord distribution, twist angle, and pitch angle to achieve stable performance at TSR = 6. The results indicate that the estimated power coefficient increases from approximately 0.28 in the initial configuration to about 0.35–0.38 after geometric adjustment. The turbine is estimated to produce theoretical power in the range of 90–150 W under moderate wind conditions. The three-blade configuration with gradual twist distribution and moderate pitch angle improves aerodynamic stability and energy conversion efficiency. This study provides a CAD-based design framework for micro-scale HAWT turbines intended for low wind speed environments, particularly in urban coastal areas where wind potential is limited.
Impact of Thresher Drum Rotation in Removing Palm Fruit from Boiled Fruit Bunches (TBR) Tri Astina Pangaribuan; Winfronstein Naibaho
Journal of Engineering Science and Technology Management (JES-TM) Vol. 6 No. 1 (2026): Maret 2026
Publisher : Journal of Engineering Science and Technology Management

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jestm.v6i1.366

Abstract

The effectiveness of palm fruit release at the Thresher station is greatly influenced by the stability of the drum rotation speed. However, operational conditions at PTPN IV Kebun Mayanng indicate instability of rotation due to variations in fruit size and fluctuations in the energy supply from the Boiler, so that the threshing process does not always occur optimally. This study aims to analyze the effect of the Thresher drum rotation speed on the ability to release palm fruit from the bunch and its impact on fruit damage under field conditions. The research method uses a mixed approach through direct observation at the Thresher station and quantitative measurements at three rotation variations, namely 20, 23, and 26 RPM. The measurement results are then analyzed qualitatively based on actual operational conditions. The results show that a speed of 23 RPM is the most stable rotation, resulting in effective fruit release with an acceptable level of fruit damage. A rotation of 20 RPM provides lower fruit damage, but causes less optimal fruit release and increases the number of fruit left on empty bunches. Meanwhile, a rotation of 26 RPM is able to increase the effectiveness of release, but causes very high fruit damage due to the influence of excessive centrifugal force. Overall, this study demonstrates a trade-off between release efficiency and fruit damage. Too high a rotation speed increases release efficiency but increases fruit damage, while too low a rotation speed decreases release efficiency and increases loss, albeit with less damage
Analysis of the Effect of Boiling Time on Oil Yield Palm oil at PTPN IV Mayang Plantation Luat Surya Napitupulu; Tambos August Sianturi
Journal of Engineering Science and Technology Management (JES-TM) Vol. 6 No. 1 (2026): Maret 2026
Publisher : Journal of Engineering Science and Technology Management

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jestm.v6i1.371

Abstract

The boiling process of fresh fruit bunches (FFB) at PTPN IV Kebun Mayang is carried out using a semi-automatic system using a horizontal steam pressure sterilizer. This study analyzed three boiling time programs, namely 85 minutes, 90 minutes, and 95 minutes, with a triple peak pressure system. The purpose of the study was to determine the most optimal boiling time to obtain the potential palm oil yield. The method used was a direct experiment with quantitative and qualitative observations of the potential of fresh fruit bunches (FFB) and oil yield. The results showed that the average RMS of the 85-minute experiment was 16.98%, the average RMS of the 90-minute experiment was 23.76%, and the average RMS of the 95-minute experiment was 19.44%. In conclusion, the 90-minute boiling time appears to provide the most balanced results. Boiling that is too short results in low yields while boiling that exceeds the optimum limit also tends to reduce the quality or amount of extractable yield.

Page 16 of 17 | Total Record : 164

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