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Resy Kumala Sari
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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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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 196 Documents
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Analysis of the Implementation of the International Safety Management (ISM) Code During Tank Cleaning to Optimize Safety and Security on MT. Gandawati Daffani Tysa Lubis, Muhammad Naufal; Lestari, Elise Dwi; Eddi; Sitepu, Firdaus
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.v6i1.398

Abstract

Tank cleaning on chemical tankers constitutes a high-risk maritime operation necessitating rigorous safety protocols to mitigate asphyxiation, toxicity, and explosion hazards. This study analyzes the implementation of the International Safety Management (ISM) Code during tank cleaning operations on board MT. Gandawati 1 to optimize occupational safety and security. Utilizing a descriptive qualitative approach, data were gathered through twelve months of direct participant observation, document analysis, and in-depth interviews with the ship’s command and crew. The results demonstrate a high level of structural compliance (88%), characterized by the systematic execution of risk assessments, enclosed space entry permits, and continuous atmospheric monitoring. However, a critical gap persists between regulatory requirements and operational reality, primarily driven by human factors. The study identified a 38.5% non-compliance rate regarding Personal Protective Equipment (PPE) usage, attributed to thermal discomfort and commercial time pressures. While the vessel achieved a zero-fatality record, the prevalence of near-miss incidents indicates that safety management has yet to be fully internalized into the onboard culture. The research concludes that optimizing safety requires transcending administrative compliance through enhanced behavioral supervision, ergonomic equipment upgrades, and the cultivation of a resilient safety culture.
Analysis of the Realization and Contribution of Non-Tax State Revenue (PNBP) by Service Type at the Karangantu Class III Port Authority Unit in 2024 Claudia Ode, Chintya Putri; Nugraha, Bugi; Eddi; Dahri, Muh.
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.v6i1.404

Abstract

This study aims to analyze the realization and contribution of Non-Tax State Revenue (PNBP) based on service types at the Class III Port Authority Unit (UPP) Karangantu in 2024. The research focuses on: (1) revenue realization by service groups, (2) monthly realization trends and factors influencing fluctuations, (3) the contribution of each service type, and (4) the level of achievement of the 2024 Non-Tax State Revenue target. The study employs a quantitative descriptive method using secondary data obtained from official 2024 Non-Tax State Revenue reports. Data collection techniques include documentation, observations conducted during onshore practice, and informal interviews. Data analysis covers the calculation of realization percentages, contribution levels, monthly trends, and comparisons between revenue targets and actual achievements. The results indicate that the total realization of Non-Tax State Revenue in 2024 amounted to Rp 4,716,520,673, with revenue trends fluctuating throughout the year. The highest realization occurred in April, while the lowest was recorded in July. Contribution analysis shows that navigation aids services contributed the largest share (47.3%), followed by port services (45.8%). The achievement level of Non-Tax State Revenue reached 207.90% of the target, categorizing the performance as highly effective. This study concludes that the Class III Port Authority Unit Karangantu successfully managed Non-Tax State Revenue throughout 2024. The findings are expected to serve as evaluation material and support strategic planning for revenue improvement in the following year.
Identification and Solutions for Cargo Loss on Self-Propelled Oil Barge (SPOB) Seroja V Firmansyah, Achmad Amin; Sutoyo; Arleiny; Pribadi, Teguh
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.v6i1.407

Abstract

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.
Thermal Performance Improvement of a Counter-Flow Double-Pipe Heat Exchanger Using a Twisted Turbulator Eric Maspaitella; Nicolas Titahelu; Cendy Sophia Edwina Tupamahu
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.v6i1.387

Abstract

Internal combustion systems, such as 5 KVA generators, convert only part of fossil fuel energy into useful work, while the remaining energy is released as waste heat through exhaust gas, cooling systems, and mechanical losses. This study aims to improve the thermal performance of a double-pipe heat exchanger using a twisted turbulator by varying the pitch-to-diameter ratio, p/d, from 0.8 to 3.9. The experiment was conducted at the Thermodynamics and Heat Transfer Laboratory, Faculty of Engineering, Pattimura University, using five p/d variations, namely 0.8, 1.6, 2.4, 3.2, and 3.9. The operating conditions were maintained constant, with a hot fluid inlet temperature of 523.2 K, a cold fluid inlet temperature of 308.2 K, a cold fluid velocity of 1.0 m/s, and a hot fluid velocity of 5.0 m/s. The main components included a copper tube bank, steel pipe casing, thermocouples, flowmeter, pipe system, and valves. The performance parameters were evaluated using Reynolds number, Prandtl number, friction factor, Nusselt number, overall heat transfer coefficient, actual heat transfer rate, maximum heat transfer rate, and effectiveness. The results show that the best performance was obtained at p/d = 0.8, producing a cold fluid outlet temperature of 425.84 K, Nusselt number of 7.569, overall heat transfer coefficient of 0.2029 W/m²·K, and effectiveness of 39.95%. The lower p/d ratio enhanced swirl flow, turbulence intensity, fluid mixing, and thermal boundary layer disruption. Therefore, p/d = 0.8 is recommended for improving the tested heat exchanger performance in small-scale waste heat recovery applications under laboratory operating conditions and design.
Evaluation of Fire Safety System Implementation in the Rectorate and Lecture Buildings of Universitas Pahlawan Aniisya, Khairun; Adeswastoto, Hanantatur; Gusman, Deddy
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.v6i1.441

Abstract

The results of this study show that the implementation of the fire safety system at Universitas Pahlawan Tuanku Tambusai buildings is considered poor based on the standards of quantity, size, site completeness, means of rescue, and active protection systems. Furthermore, the fire safety reliability system has partially followed applicable SNI (Indonesian National Standard), but some systems have not yet complied with the required safety standards. The methods used in this study include a descriptive method to determine the implementation of rescue facilities and passive protection systems against fire hazards, and a quantitative descriptive method to assess the reliability of building safety systems against fire hazards. Construction in major cities is currently increasing. The construction of various buildings aims to achieve urban success in improving public welfare. One of the safety aspects that must be considered in building construction is safety from fire hazards. The purpose of this study is to determine the implementation of the fire safety system in lecture buildings and to assess the level of fire safety reliability in accordance with the Indonesian National Standard (SNI) in lecture buildings.
Kinetic Absorption of CO₂ from Motor Vehicle Exhaust Gas Using K₂CO₃ (Potassium Carbonate) Absorbent in a Bubble Column Reactor Raihan Nur Awwabin; Muhammad Yerizam; Erwana Dewi
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.v6i1.304

Abstract

This study investigates the kinetics of CO₂ absorption from motor vehicle exhaust using potassium carbonate (K₂CO₃) as an absorbent in a jet bubble column reactor. The research aims to analyze the effect of process variables on reaction rate constants and CO₂ conversion efficiency. Employing a pure experimental method, the study was conducted at the Chemical Engineering Laboratory, Sriwijaya State Polytechnic, from August to July 2024. The population comprised all absorption processes using K₂CO₃, with purposive sampling applied to select experimental conditions. Key instruments included a jet bubble column reactor, gas analyzer, and supporting equipment. Data analysis utilized descriptive statistics and quantitative comparison across variable treatments. Results revealed that optimal CO₂ absorption occurred at a gas flow rate of 0.3–0.4 L/min, liquid flow rate of 0.6–0.7 L/min, temperature of 40°C, and K₂CO₃ concentration of 0.04 M, yielding the highest reaction rate constant and CO₂ conversion. The study concludes that optimizing process variables is crucial for enhancing reactor performance, while further research is recommended to address scale-up and equipment limitations.
Molecular Docking Approach to Curcumin Compounds and Its Derivatives as Anticancer Agents: A Literature Review Rani Putri Luthfiani; Nadya Nasywa Saputri; Saeful Amin
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.v6i1.308

Abstract

Cancer remains a major global health challenge, with increasing incidence and mortality rates. This study aims to regularly review the potential of curcumin and its derivatives as anticancer agents using molecular docking approaches. A Systematic Literature Review (SLR) was conducted, analyzing ten original articles published between 2020 and 2025 from PubMed and Google Scholar. The population encompassed all full-text studies on molecular docking of curcumin and its derivatives against cancer protein targets, with purposive sampling based on inclusion and exclusion criteria. Data were extracted on ligands, protein targets, docking software, validation parameters, and binding energies, then analyzed using narrative synthesis and comparative methods. The results show that curcumin and its derivatives interact with multiple cancer-related proteins, such as EGFR, HER2, CDK2, and androgen receptors, with derivatives exhibiting more stable binding energies (−6 to −9 kcal/mol) than natural curcumin. These findings indicate that curcumin derivatives have higher anticancer activity and overcome bioavailability limitations. The conclusion highlights the need for standardized molecular docking protocols and integration with biological assays to support clinical development of curcumin-based therapies.
Bit Error Rate (BER) Performance Analysis on ASK, FSK, and PSK Digital Modulation in AWGN Channels Muhammad Ferdinand Putra Mulyadi; Rhaya Prayoga; Muhammad Rifqi Sardono; Rustamaji
Journal of Engineering Science and Technology Management (JES-TM) Vol. 6 No. 2 (2026): JES-TM 2026
Publisher : Journal of Engineering Science and Technology Management

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jestm.v6i2.364

Abstract

Digital communication systems face the challenge of Additive White Gaussian Noise (AWGN), which causes signal distortion and increases the Bit Error Rate (BER). This study aims to analyze and compare the BER performance of Amplitude Shift Keying (ASK), Frequency Shift Keying (FSK), and Phase Shift Keying (PSK) modulation techniques on AWGN channels through MATLAB simulations over an SNR range of 0–14 dB. A quantitative experimental approach was employed using Monte Carlo analysis with 100,000 bits sampled per SNR test point, validated against theoretical error probability using the Q function. The results demonstrate that PSK (BPSK) achieves the best performance, reaching a BER of  at an SNR of approximately 7 dB, while FSK requires approximately 10 dB to achieve the same BER threshold — a difference of ≈3 dB — and ASK remains at a BER of approximately  even at 14 dB SNR, reflecting its inherent vulnerability to additive amplitude noise. These findings confirm that PSK modulation offers the greatest power efficiency and noise robustness among the three techniques. The study recommends PSK for high-noise wireless applications such as IoT sensor networks and communication satellites where optimal power efficiency and transmission reliability are critical.
Implementation of a Decision Support System Using the Simple Additive Weighting (SAW) Method in the New Student Admission Selection Process Maya Oktarina; Nazori Suhandi; Indah Permatasari
Journal of Engineering Science and Technology Management (JES-TM) Vol. 6 No. 2 (2026): JES-TM 2026
Publisher : Journal of Engineering Science and Technology Management

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jestm.v6i2.385

Abstract

The selection process for new student admissions in secondary schools is often manual and error-prone, so a web-based decision support system (DSS) is needed to improve objectivity and efficiency. This study aims to design and implement a DSS using the Simple Additive Weighting (SAW) method at SMK Negeri 1 Tanjung Lubuk. An applied quantitative approach with the Waterfall model was used; the population was all prospective students through three admission pathways, a sample of 23 purposive applicants. Instruments included academic data documents, interviews, and web input; data analysis via SAW (matrix normalization, criteria weighting, preference values). The results showed an accurate ranking with the highest score of 1.84 (Muhamad Angga Prayitno) based on five criteria (exam scores, report cards, KIP, achievement, distance). The conclusion states that the system increases transparency and speed of selection, and replication in other schools with broader testing is recommended.
Analysis of Performance Degradation of the Refrigeration System on MT Nolowati III Sahrul Romadon; Moejiono; Mochammad Zainuddin; Agus Prawoto; Prima Yudha Yudianto
Journal of Engineering Science and Technology Management (JES-TM) Vol. 6 No. 2 (2026): JES-TM 2026
Publisher : Journal of Engineering Science and Technology Management

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jestm.v6i2.408

Abstract

The refrigeration unit, also known as the refrigerator, is a crucial auxiliary machine on board the MT Nolowati III, as it is responsible for ensuring the crew remains healthy and refreshed. A common operational issue is the refrigeration unit's inability to reach its designated operating temperature. This includes the meat compartment (-10°C to -12°C) and the vegetable/fruit compartment (+4°C to +10°C). Suboptimal supporting components such as the compressor and thermostat, as well as a lack of standard maintenance, contribute to this issue. Analysis shows that the decline in performance is mostly caused by technical factors, such as dirt covering the condenser or thermostat errors, which disrupt the refrigeration cycle and cause temperature increases. To prevent this, preventative measures focus on regular maintenance, routine condenser cleaning, and performing maintenance work according to the manual's instructions.

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