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Shipping companies have an important role in providing services to ships visiting a port. Shipping companies appointed as agents are the parties that will be responsible for taking care of everything so that the ships they represent can dock properly, on time, and smoothly in carrying out their activities at the port. Ship agency services are needed to assist the process of clearance in and out of ships at a port in order to create conducive ship activities. This study was conducted to determine the role of agencies in serving the clearance in and out process and the factors that hinder the ship clearance process using a manual system at PT. Bama Putra Sukses Bogor. This study uses a qualitative approach with a descriptive type. Data collection for this study was carried out using observation, interview, and documentation techniques. The results of this study showed that the role of agencies in serving ship clearance in and out with a manual system at PT. Bama Putra Sukses Bogor is a series of ship clearance processes from ship entry to ship exit. Agents play a role in providing their services to ship owners in ship clearance services that are oriented towards managing ship documents in order to facilitate the loading and unloading process. Factors that hinder the clearance in and out process at PT. Bama Putra Sukses consist of expired documents and problems waiting for the destination port or called waiting next port.

This study aims to analyze the impact of overtime work on physical and mental fatigue of the crew of the MV ship. Manalagi Tisya, by identifying the causal factors and consequences that may arise due to additional working hours. In this study, the researcher will apply a qualitative research method with a descriptive approach. This research was conducted by the author on the MV ship. Manalagi Tisya owned by PT Pelayaran Manalagi which is a subsidiary of PT Salam Pacific Indonesia Lines, with the ship call sign "YBTL2" and a total load capacity of 52201 MT. Data collection techniques in this study used observation, interviews and documentation. Data analysis techniques used data reduction, data presentation, drawing conclusions. Testing the validity of this research data used source triangulation, technical triangulation, and time triangulation. Based on the results of the study, it explains that the Overtime Pattern: The crew of the MV ship. Manalagi Tisya experienced an average of 4.5 hours of overtime per day, with the Engine Department experiencing the highest overtime (an average of 5.2 hours). Overtime most often occurs during loading and unloading at the port (35%) and when facing bad weather (27%), Physical Impact: Continuous overtime causes significant physical impacts in the form of sleep disturbances (80%), back and waist pain (70%), and muscle pain (60%), Mental Impact: As many as 85% of crew experience moderate to severe mental fatigue due to overtime, with the main symptoms being difficulty concentrating (75%), irritability (65%), and decreased decision-making ability (60%). Safety: There is a strong positive correlation (r = 0.82) between the duration of overtime and the frequency of safety incidents. The risk of incidents increases by 28% for every additional 2 hours of overtime, Work Performance: Overtime has an impact on decreased work performance, especially in problem-solving skills (45%), compliance with procedures (41%), and effective communication (37%), Overtime Management: The most effective overtime management strategies are task rotation and fatigue management training, but their implementation is still not optimal. Limited number of personnel and operational demands are the main obstacles in minimizing overtime, Regulatory Compliance: Average working hours of MV ship crew. Keywords: Overtime Work, Physical Fatigue, Mental Crew.

Bridge infrastructure is a vital component of transportation systems that is vulnerable to structural damage caused by dynamic loads, environmental factors, and aging. Early crack detection is crucial to prevent structural failures that may lead to catastrophic consequences. This study aims to develop a non-destructive detection method based on acoustic sensors to identify cracks in bridge structures with higher sensitivity and accuracy compared to conventional visual inspections. The research was conducted through laboratory experiments and field tests using acoustic sensors, data acquisition devices, and signal analysis software. The procedure included sensor installation on a bridge model, simulation of artificial cracks with varying sizes and positions, recording of acoustic wave signals, and data analysis using frequency spectrum, amplitude, and waveform pattern approaches. The results show significant differences between normal and cracked conditions in the frequency spectrum, where cracks produced amplitude anomalies at specific frequencies. Amplitude analysis revealed a positive correlation between crack size and acoustic signal intensity, while waveform pattern analysis demonstrated the influence of crack position on distortion levels. Cracks located at the center generated the highest distortion, followed by joints and edges. These findings confirm that acoustic sensors, particularly fiber-optic-based ones, offer advantages such as high sensitivity, reliability under complex environmental conditions, and the ability to detect subsurface cracks. The implications of this research highlight the potential development of an acoustic sensor-based structural health monitoring system integrated with real-time analysis software, thereby supporting preventive maintenance, extending infrastructure lifespan, and enhancing transportation safety.

The Influence of Dry Bulk Cargo Discharge Activities on the Occurrence of Short Cargo at PT. Terminal Trluk Lamong Dry bulk unloading activities using grab ship unloaders (GSU) and conveyors often result in an unloading process that differs from the specified loading plan, resulting in a quantity of dry bulk cargo that is lower than stated in the document, known as short cargo.This research uses an associative quantitative method to determine the relationship between loading duration (X1), cargo volume (X2), and short cargo (Y), as well as the simultaneous influence of each factor on short cargo. Multiple linear regression data analysis techniques are used to test the hypothesis, and the data are processed using the SPSS version 27 program. The results showed that unloading duration and cargo volume have a significant, though partial, effect on short cargo. They have an influence of 176.5% and 0.6%, respectively. The variables of loading duration and cargo volume cause short cargo to occur simultaneously. Thus, each factor has an 85.2% simultaneous influence on short cargo, while the remaining 14.8% is influenced by factors outside the scope of the study.

Designing a user interface (UI) requires a deep understanding of how users think and interact with systems. This study explores the psychological and physiological aspects that influence user interaction with UI, such as perception, cognitive load, reaction time, and ergonomic factors. Through literature analysis and UI usability testing, this paper identifies design principles that enhance user experience by aligning interface structures with human capabilities. The results show that interfaces built with attention to psychological factors like user memory and attention span, as well as physiological aspects such as eye movement and hand positioning, significantly improve user satisfaction and efficiency.

This lesson is to construct a durable and efficient form rigid pavement by utilizing the structural analysis and material performance approach. Rigid pavement is the main choice in highway construction because of its ability to bear heavy loads and its relatively long service life. The research methodology involves structural analysis to determine the optimal thickness and type of material for rigid pavement. This structural analysis considers various factors, including the estimated traffic load, subgrade characteristics, and local environmental conditions. In addition, material performance evaluation is also carried out to select materials that are appropriate to environmental conditions and meet technical requirements. The results of this study are recommendations for rigid pavement planning that include the right thickness, optimal material type, and construction specifications that are in accordance with applicable technical standards. The results of Rigid Pavement Thickness Planning using the Bina Marga 2003 Method on the Sumbermiri - Gudo Jombang Road case study produced a concrete slab thickness of  20 cm with K-300 concrete quality. In addition, the reinforcement used has a diameter of Ø 12 mm with a distance between reinforcements of  8,5 cm.

This study aims to analyze the effect of port integration of PT Berlian Manyar Sejahtera with JIIPE Industrial Estate on logistics distribution efficiency. The background is the existence of distribution costs in Indonesia, which are relatively expensive. The integration of ports with industrial estates and other factors could cut distribution costs. The purpose of this research is to find out how many percent of the influence of proximity distance for distribution costs and also the time in the distribution process. In this research, a quantitative methods is used which is assisted by a software, namely SPSS version 27. Data collection techniques were carried out by interviews, documentation, and literature study. The data used includes the distance from the port to the warehouse receiving goods, distribution rates, and the length of time in the loading and unloading process. The results of the analysis show that there is an influence between distance, costs, and tariffs in the distribution process. And how this integration is significantly beneficial for service users

The advancement of technology within organizations supports companies in innovating their work systems more efficiently and effectively. Technological sophistication has transformed the organizational work environment by enabling hybrid models that combine remote and in-office work. This research aims to examine the influence of hybrid work arrangements and dual role conflict on employee performance in Indonesia’s pharmaceutical sector. Data were gathered through a questionnaire distributed via Google Forms to 185 employees working in the pharmaceutical industry across Indonesia. The data analysis was conducted using SPSS version 27. The research instruments were tested for validity and reliability; validity was assessed through Confirmatory Factor Analysis (CFA MSA), including Kaiser-Meyer-Olkin (KMO), Anti-Image, and Factor Loadings. Normality was examined using the one-sample Kolmogorov-Smirnov test. Hypothesis testing employed multiple linear regression and t-tests. The findings indicate that both hybrid work systems and dual role conflict have a positive and significant impact on employee performance.

Fuel consumption is a necessity in moving mechanical equipment, where fuel consumption is influenced by road conditions, horsepower, and load factors. PT. Mitra Indah Lestari uses Hyundai 480 and Sany750-H excavators. The transport equipment used is Wechai WT90, Tonly TLD90, and Quester CWE 330. This study uses a quantitative method and obtains fuel consumption results, where the fuel consumption of the Hyundai 480 and Sany 750-H excavators is 37.89 liters/hour and 59.91 liters/hour, respectively. The fuel consumption of the Wechai WT90, Tonly TLD90, and Quester CWE 330 transport equipment is 25.19 liters/hour; 27.53 liters/hour; and 10.66 liters/hour, respectively.

PLN as an electricity provider that serves all regions in Indonesia certainly always wants to provide the best service to its consumers, including PT. PLN Persero UP3 Gresik. Along with the increase in consumers, the company continues to develop distribution lines, however, because the addition of more and more lines makes the distribution cables longer and the load becomes greater, resulting in voltage drops and power factors decreasing in several feeders, including in the feeder network. LOWAYU, causing poor power quality.This research aims to find and obtain the magnitude of the power flow which includes active power, reactive power, apparent power and the magnitude of the power losses (losses) contained in the LOWAYU feeder network, the magnitude of the voltage and voltage drop on each bus on the network. LOWAYU feeder using the backward-forward method. And determine the value of reactive power required for the capacitor on each bus that experiences a voltage drop. Then a comparison will be made between the results of manual calculations using the backward-forward method and the results of simulation data using ETAP Power Station 19.0.1 software.From this research, it can be seen that the safe limit for the voltage drop value is still below 5% or above 5%, so it is necessary to add capacitor banks to improve the power factor and reduce the voltage drop value on distribution network buses that experience voltage drops.

Landslides or commonly called landslides are a disaster that often hits areas with tropical climates. The damage caused by landslides is most dominantly structural damage such as damaged road sections that are cut off. At the research location, there was a landslide that resulted in the obstruction of the road flow which was originally two lanes to one lane, it is feared that landslides will occur again, so one of the landslide prevention techniques is to use retaining walls. Based on this, this study is deemed necessary to determine the slope safety factor and to determine the safety of the slope after using retaining walls. The purpose of this study was to determine the level of slope safety without being given a load, the level of slope safety after being given a load of 25 Kpa and the level of slope safety after being given a load of 25 kpa and the addition of a retaining wall on the research slope using a Retaining Wall. In this study using the Finite Element Method in the calculation to find the level of safety of a slope, the researcher used the help of Plaxis 2D V20 Software, and the results of the calculation obtained a slope safety factor of 1.31, after being given a load of 25 kpa the slope safety factor was 1.14 and after being given a retaining wall the slope safety factor increased to 2.46.

This study aims to examine the effect of idle time on the productivity of dry bulk loading and unloading activities at the Java Integrated Industrial and Port Estate (JIIPE). The research employed a quantitative correlational approach, with data collection techniques including observation, documentation, and company records. The research sample consisted of 12 vessels engaged in loading and unloading at Java Integrated Industrial and Port Estate (JIIPE) port during the period from January to July 2024. The analysis revealed a correlation coefficient of -0.16, indicating a very weak negative relationship between idle time and productivity. The coefficient of determination, at 2.56%, suggests that idle time contributes only marginally to productivity, while the remainder is influenced by other factors. The factors affecting idle time include weather conditions, equipment failures, and truck delays. The conclusion indicates that while idle time does impact productivity, the effect is not statistically significant..    

The loading and unloading process involves moving goods from one place to another, often requiring specialized equipment such as a wire crane. In maritime operations, unexpected incidents like wire crane breakage can occur. Wire crane breakage refers to damage in the sling wire of a ship's crane, reducing its lifting capacity and causing the wire fibres to unravel. During sea-based fieldwork on the MV. Pacific Bulk, researchers observed a wire crane failure during loading and unloading operations, which caused delays and financial losses. This study aims to identify the causes of wire crane breakage on the MV. Pacific Bulk and examine its technical and operational impacts. Using a qualitative descriptive method and fishbone analysis for data interpretation, the study found several contributing factors: wire corrosion, crane age, lack of standard operating procedures (SOPs) for crane maintenance, insufficient crew, inadequate maintenance, lack of routine inspections, and challenging environmental conditions. The research also highlights the technical and operational consequences of such failures, including delays and economic loss. To address the issue, the study suggests implementing scheduled periodic inspections following SOPs, applying regular lubrication, and maintaining data records of the wire crane’s lifespan. These preventative measures aim to improve operational efficiency and avoid future wire crane failures.

Introduction: The integration of Digital Twin (DT) technology and the Internet of Things (IoT) into Building Energy Management Systems (BEMS) offers a transformative approach to optimizing energy consumption in buildings. This study explores the development of a Digital Twin based BEMS prototype, which leverages real time data collection, predictive analytics, and machine learning to enhance energy efficiency, reduce costs, and support sustainability goals in modern buildings. The research also addresses key gaps in current energy management systems, including real time adaptive control and integration with smart grid platforms. Literature Review: Previous research highlights the limitations of traditional BEMS, which often rely on static control strategies and lack real time adaptability. Recent advancements, including predictive maintenance and machine learning integration, have improved energy optimization. However, challenges such as data interoperability, scalability, and cybersecurity remain. This review consolidates current approaches and identifies opportunities for enhancing BEMS through the integration of DT technology, IoT, and machine learning. Materials and Method: The methodology employed involves the design of a Digital Twin based BEMS prototype, incorporating IoT sensors for real time data collection on variables such as HVAC load, occupancy, and environmental factors. The system uses time series forecasting and adaptive control strategies to optimize energy consumption. A case study building is used for validation, with performance metrics such as energy savings, CO₂ footprint reduction, and peak load reduction assessed to evaluate the system's effectiveness. Results and Discussion: The results demonstrate a significant reduction in energy consumption (up to 50%) compared to traditional BEMS, along with improved forecasting accuracy and sustainability performance. The prototype achieved a high R² score in predicting energy usage, validated through real world application in the case study building. The economic feasibility analysis showed substantial cost savings and a strong return on investment, making the system a financially viable solution for energy efficient building management.

Cargo safety on container ships is a crucial aspect of maritime operations, especially during voyages across open waters such as the Indian Ocean, which is characterized by extreme weather conditions and high waves. A common problem encountered is cargo damage or shifting due to non-compliance with proper stowage and securing procedures. This study aims to analyze the factors influencing cargo safety during container ship voyages in the Indian Ocean. The research employs a qualitative descriptive method using a case study approach. Data collection was conducted through historical document analysis related to cargo damage incidents and direct observation of the loading, stowage, and securing processes on board. The findings indicate that severe weather conditions, suboptimal cargo stowage techniques, and low compliance with safety procedures are the main factors contributing to cargo instability. Based on these findings, the study recommends enhanced training for crew members, the use of real-time cargo monitoring technologies, and stricter enforcement of regulations concerning container securing and stowage. These measures are expected to minimize the risk of incidents and improve overall cargo safety during maritime transport.

This study aims to analyze the suboptimal performance of hydraulic pump system on hatch cover performance on MV. Emerald Indah using USG (Urgency, Seriousness, Growth) method and data collection techniques in the form of observation, documents, and interview. The purpose of this study is to determine the causes, effect and efforts in solving the problems discussed. The results of the study indicate that several factors cause the hydraulic pump system to not function optimally , including dirty filters, leak in the hydraulic pump and pipe, and operation that is not in accordance with procedures. The effect of the suboptimal hydraulic pressure which ultimately becomes the main problem that inhibits the hatch cover opening process. To overcome this problem, improvements are needed such as periodic filter cleaning, replacement of leaking components, and increasing crew understanding of operational procedures. This research is expected to provide insight for related parties in improving the performanceof the hydraulic pump system and the efficiency of the loading and unloading process on ships.

The role of Cargo Handling on the Loading and Unloading Process at PT Terminal Teluk Lamong is very important for the loading and unloading process at the port. This research aims to identify various technical and non technical obstacles in the operation of cargo handling equipment such as ASC, forklift, and reach stacker. The interview results showed that there are four main factors that become obstacles in the loading and unloading process, namely machines, methods, facilities, and manpower. Further analysis using fishbone diagrams reinforced these findings by outlining the causes of each factor, ranging from machine interference, wrong container placement methods, limited technological facilities such as Container Scanner Reader (CSR), to the driver’s lack of understanding of the automation system. Quantitatively, the efficiency of cargo handling was evaluated through the 2023 container throughput, which showed a positive trend with a significant increase in load activity, especially in October which recorded the highest number of 39.106 Boxes. The analysis concluded that although there are various obstacles in cargo handling practices, the system implemented by PT Terminal Teluk Lamong has generally been able to improve the efficiency of the loading and unloading process, as evidenced by the volume of container handling.

Pressure vessels are critical components in the energy industry, used to store and process high-pressure fluids. The structural reliability of these vessels plays a pivotal role in ensuring operational safety and system efficiency. This study aims to analyze the design and reliability of pressure vessels using both numerical and experimental approaches to optimize performance and enhance safety factors. The numerical method was conducted through Finite Element Analysis (FEA) using ANSYS software to evaluate stress distribution, stress concentration, and potential failure modes under various operational load scenarios. Meanwhile, the experimental method involved hydrostatic pressure testing, strain measurements using strain gauges, and displacement analysis to validate the numerical simulation results. Data were collected from simulations and laboratory experiments, then analyzed quantitatively by comparing key parameters such as stress distribution, deformation patterns, and safety factors against industry standards. The results indicate that combining numerical and experimental approaches improves the accuracy of pressure vessel behavior predictions, enables more efficient design optimization, and enhances structural reliability. In conclusion, the methods applied in this study can serve as a reference for developing safer, more efficient pressure vessel designs that comply with industrial standards, thereby supporting improved safety and operational efficiency in the energy sector.

Public services today are additional needs whose role is very important in society because they can relieve the community and help national development which aims to realize a just and prosperous society in the era of economic democracy. However, public services are indeed loaded with various problems, what's more, the range itself is very wide, covering both the profit and non-profit sectors. One of the means of shipping goods that can be used is PT Pos Indonesia. Atambua Branch Post Office is one of the branches of PT Pos Indonesia which operates for the Belu Regency area, East Nusa Tenggara Province. The formulation of the problems in this study are (1) How is the responsibility given by PT. Pos Indonesia Atambua Branch for the delivery of lost or damaged goods? (2) How are the obstacles to the implementation of the responsibility for lost or damaged goods provided by PT. Pos Indonesia Atambua Branch? The type of research used by the author is Empirical Legal research, the type of data used in this research is qualitative data. The data used in the research based on the relevance of the source data, namely primary and secondary data. The results of the study suggest that: (1) Liability for lost shipments by PT Pos Indonesia Atambua Branch, namely by providing compensation of 1 (one) x shipping costs and plus one time compensation guarantee that has been included in the proof of delivery receipt. If the shipment is damaged but part of the shipment can still be functioned, PT Pos Indonesia Atambua Branch provides compensation of 1 (one) x shipping costs and plus half x the cost of the guarantee of compensation that has been included in the proof of delivery receipt, but if it is totally damaged and loses its function, it will be given compensation of 1 (one) x shipping costs and add 1 (one) x the cost of compensation that has been included in the proof of delivery receipt. (2) The inhibiting factors are the lack of communication between PT Pos Indonesia and service users, negligence from PT Pos Indonesia Atambua Branch (Courier) which still often closes communication with the Foreman related to these problems.

This research aims to identify the causes of delays in the loading and unloading process of Crude palm oil (CPO), the impact of delays, and the company's efforts to overcome these obstacles. The research method used is a qualitative method by looking directly at the facts in the field. The data collection technique is direct observation at Teluk Bagus Harbor, then interviewing several sources and corroborating with documentation. This research obtained results that the causes of delays in the loading and unloading process of Crude Palm Oil (CPO) occurred due to natural, human factors and the quality of palm fruit. The impact that arises is increasing operational costs. Efforts made by the company include adding a new fleet and recruiting competent loading and unloading workers.