bluuebunny/crossref_metadata_2025_split huggingface dataset:
Memory effects in colloidal motion under confinement and driving
Authors: Straube Arthur V , Höfling Felix 
Published: June 2024

Abstract
The transport of individual particles in inhomogeneous environments is complex and exhibits non-Markovian responses. The latter may be quantified by a memory function within the framework of the linear generalised Langevin equation (GLE). Here, we exemplify the implications of steady driving on the memory function of a colloidal model system for Brownian motion in a corrugated potential landscape, specifically, for one-dimensional motion in a sinusoidal potential. To this end, we consider the overdamped limit of the GLE, which is facilitated by separating the memory function into a singular (Markovian) and a regular (non-Markovian) part. Relying on exact solutions for the investigated model, we show that the random force entering the GLE must display a bias far from equilibrium, which corroborates a recent general prediction. Based on data for the mean-square displacement (MSD) obtained from Brownian dynamics simulations, we estimate the memory function for different driving strengths and show that already moderate driving accelerates the decay of the memory function by several orders of magnitude in time. We find that the memory may persist on much longer timescales than expected from the convergence of the MSD to its long-time asymptote. Furthermore, the functional form of the memory function changes from a monotonic decay to a non-monotonic, damped oscillatory behaviour, which can be understood from a competition of confined motion and depinning. Our analysis of the simulation data further reveals a pronounced non-Gaussianity, which questions the Gaussian approximation of the random force entering the GLE.
Unbiased density computation for stochastic resetting
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Authors: Kawai Reiichiro 
Published: June 2024

Abstract
We establish a practical means for unbiased computation of the marginal probability density function of the dynamics under stochastic resetting. In contrast to conventional dynamics devoid of resetting, the marginal probability density function under resetting may exhibit cusps and, in multi-dimensions, explosions at reset positions, arising from the compelled displacement of mass. Standard numerical techniques, such as kernel density estimation, fall short in accurately reproducing those characteristics due to their inherent smoothing effects. The proposed unbiased estimation formulas are derived using advanced stochastic calculus in their general formulations, yet their implementation in specific problem settings involves only elementary numerical operations, requiring minimal mathematical expertise and marking the very first instance of a numerical method free from bias in this context. We present numerical results throughout to validate the derived estimation formulas and, more broadly, to demonstrate the effectiveness of our approach in accurately capturing the irregularities of the marginal probability density function.
A Study on Usage of Treated Wastewater as Resource Management for the Sustainable Development of Al Amerat
Authors: Majid Salim Al Aamri Ahmed , Parameswari K , Gopalakrishnan K , Ihtesham Hussain Mohammed , Said Al Kaabi Khoula , Ali Said Al Alawi Aliya 
Published: June 2024

Abstract
Sustaining life on Earth is dependent upon water as an invaluable resource. Oman is in a semi-arid region where the majority of the water demand is satisfied by the desalination process. The government allocates a substantial budget for both desalination and wastewater treatment processes to develop an advanced infrastructure for water and wastewater treatment projects. One of the cutting-edge technologies that has been developed to treat water is SBR, for the removal of toxic elements, coarse particles, pollutants, etc before the treated wastewater eventually gets discharged into the sea. In the present study, Al-Amerat (Muscat Governorate) has been selected to assess the usage of treated wastewater for various purposes to evaluate the sustainability of the current water resources management. This research focuses on assessing the volume of wastewater produced in the study area to navigate the most sustainable approaches for the management of the treated wastewater such as gardening, agriculture, industrial activities, and groundwater recharge. Future generated wastewater has been quantified considering the forecasted population in 2040 in the study area. Various maps such as geomorphology, land use/land cover maps, and groundwater potential maps were generated using GIS in this study. The water demand for various sectors has been assessed with an estimation of 7%, 20%, and 63% of the total wastewater produced (per day) that can be utilized for groundwater recharge, gardening, and agriculture respectively. This study eases the burden on the desalination process by adopting alternative approaches to enhance the sustainability of the current measures.
Design Ship Fuel Level Prototype Based on LoRa Dragino 915 MHz
Authors: Yuda D P , Amrillah M A , Widjatmoko E N , Yulianto A , Lopulalan P M , Latuheru P M 
Published: June 2024

Abstract
The development of monitoring and control system technology in the shipping industry today is experiencing very rapid development, one of the developing technologies is the fuel monitoring system. The fuel monitoring system is very important in the shipping industry because it relates to shipping operational costs and controls fuel usage during the voyage. Currently, fuel level monitoring is carried out using a sensor that sends data using a cable this has a problem because sending data via cable will have noise which will affect the measurement results. In this study, it will be discussed sending data from sensor measurements without using cables using the LoRa Dragino 915 MHz module, where the LoRa module will be divided into two points, namely LoRa Client and LoRa Server. The results of this study, the ship’s fuel level reading system can function properly and according to the specifications expected. The results of this prototype can read the condition of the fuel level in the fuel tank in real-time. In addition, the communication range between LoRa Client and Lora Server tested in this study can work with a distance of 170 meters in an open space and has a communication distance of 63 meters in a closed room.
The Implementation of the Port Watch Keeping On MV. Striat Mas
Authors: Bustamin  , Djajasasana E E , Limbong S , Rahmatullah  
Published: June 2024

Abstract
Numerous marine casualties endanger the efficient operation of today’s maritime transport and safe maritime operations. This research aimed to analyze the effectiveness of the implementation of the port watch keeping in accordance with established procedures so that undesirable things do not happen. This type of research used a qualitative descriptive method. This research was carried out on board the MV. Strait Mas from January, 22, 2021 to August, 4, 2022. The research provided a theoretical explanation of the implementation of watch keeping in this research report and this was used as a basis for solve problems that exist during the research process. Understanding the implementation of port watch keeping was the main problem in this research. Qualitative research methods produce descriptive data. This data was obtained from direct interviews and supported by some literatures, which provided a clearer description of the information conveyed. Thus, this method allows a clear explanation of the implementation of watch keeping. The results found that the performance of the hourly service can be expected. When the ship is docked, MV Strait Mas is rendered ineffective. This is due to a lack of established monitoring processes, a lack of accountability for carrying out monitoring activities while the ship is in port, and a lack of good coordination and communication between monitoring officers and the ship’s personnel on duty. It can be concluded that the negligence, poor physical condition, lack of self-confidence, and lack of sense of responsibility made watch keeping on ships ineffective
Analysis of the Impact of Disposal of Oil-Contaminated Ballast Water on Marine Pollution in MT. Bull Kangean
Authors: Sukirno  , Susanti E 
Published: June 2024

Abstract
Ballast water refers to water containing substances, materials, or goods necessary for ship stability, trim control, list (tilt), or pressure. According to the shipping terms dictionary, ballast can also include waste or refuse stored on board. This study aims to analyze the environmental impact of oil-contaminated ballast water disposal on marine pollution in MT. Bull Kangean. Oil spills at sea typically occur due to two reasons: accidental leaks caused by damage to the ship hull or oil tanks (e.g., collisions with coral reefs or sunken objects), and deliberate discharge of used oil from manufacturing equipment, which can lead to environmental contamination and harm to areas designated for oil disposal. The research methodology involves collecting primary data through observations, interviews, and document reviews to understand the impact of oil-contaminated ballast water disposal on marine pollution. Qualitative descriptive methods are employed for data analysis. The findings of this research indicate that the disposal of oil-contaminated ballast water does result in marine pollution. Observations reveal that inadequate supervision by the deck crew regarding ballast water disposal leads to the mixing of oil with the water during the disposal process.
Analysis Of Increasing Lubricating Oil Temperature In Ship Diesel Generators
Authors: Suyuti  , Nurwahidah  , Tona T , Haerani  , Nurwahidah  
Published: June 2024

Abstract
Auxiliary aircraft is a vital part of a ship that is needed as a power plant or generator. In order to avoid more heat, lubricating oil is needed in the form of a chemical substance, in the form of a liquid given between two moving objects to reduce friction, as a protective layer separating the two surfaces in contact. This is due to the operation of the diesel generator which occurs continuously and can cause friction and erosion of the moving parts. So that friction causes changes in material structure which over time can cause heat. However, this condition makes the lubricating oil temperature increase every hour. This qualitative research uses Primary and secondary data collection methods, with observation (field survey), interviews and library research. Based on the results of the analysis, the cause of the increase in lubricating oil temperature is due to the condition of the electromotor of the seawater cooling pump through the bypass faucet not according to the desired pressure, pump bearings have wear and pump gears, then the heat absorption of the L.O Cooler shelf is not optimal due to blockages in the capillary pipes. That the increase in the temperature of the diesel generator lubricating oil above 700 C and the pressure of 2 kg/cm2 during the machinist’s duty hours 00.00-04.00 LT is caused by the diesel generator auxiliary motor having an ineffective Lo Cooler heat absorption capacity, sea water cooling pressure that is less than normal and the presence of pipe connections that leak cooling pipes
Analysis of Failure in The Fire System Alarm on The Ship KL.02 Sultan Hasanuddin
Authors: Basir A , Ansar I , Salim A , Hidayat M 
Published: June 2024

Abstract
International Maritime Organization (IMO) has set regulations governing the installation of fire alarm systems on ships. The basic principle of the control system is to control the system output by comparing the actual output with the desired output. This study aims to determine the causes of false alarms on the fire alarm system on ships and to describe recommendations and solutions for failures in the fire alarm system on ships. This type of research uses a mix of methods by utilizing primary and secondary data. The data is processed by quantitative analysis and qualitative research. The results of this study indicate that the cause of the False Alarm on the Fire Alarm System is caused by the MFCA, Smoke Detector, and Cable Installation. The case that occurred in KL. 02 Sultan Hasanuddin there is no correlation between false alarms on the Fire Alarm System. The Smoke Detector correlation data with the False Alarm Fire Alarm System shows that there is a correlation with the Pearson Correlation of 0.857 > 0.4973.
Analysis of Impacts Due to The Grounding Vessels around Raja Ampat Islands
Authors: Palayukan N , Parenden D , Widarbowo D 
Published: June 2024

Abstract
The author titled “Analysis of Impact Due to The Grounding Vessels around Raja Ampat Island” describes about the socio-economic and cultural impacts that arise as the result of human error in maritime sector. This writing aims to identify the impacts due to the grounding of vessels around Raja Ampat Islands. The author conducted research studies related to several incidents of vessels which crashed the coral reefs and aground around waters of Raja Ampat islands. The writer uses descriptive method and qualitative approach in collecting data by library research, observation, and interview. The data which were collected from various sources of both literatures and information from interview are analysed by qualitative analysis method. The result of this research shows some impacts identified as the result of the grounding vessels around Raja Ampat islands. The social impacts occurred in the form of reduction/loss of coral reef biodiversity and the damage to marine environmental ecosystem. Meanwhile, economically the grounding of these vessels results costs for resolving environmental disputes; environmental damage mitigation and restoration costs; as well as the value of social and cultural ecological benefits for the ecosystem and society of the Raja Ampat islands. Furthermore, economic impact also occur on the vessels which were aground such as costs for towing, repairing the vessel, and compensation for Raja Ampat government.
Assessment of adsorption efficiency of Kaoline-Chitosan composite beads for removal of Ca and As from aqueous solution in lab-scale
Authors: Ho Ngo Anh Dao , Tran Thi Kim Tuyen 
Published: June 2024

Abstract
In this study, Kaoline (CK) and Chitosan (CTS) including water-soluble CTS (WCTS) and acid-soluble CTS (ACTS), were synthesized from commercial materials to produce composite beads which were then employed as adsorbents to investigate the removal of Ca and As from aqueous solutions. Results showed that the adhesion and granular properties of CK-WCTS and CK-ACTS were different, which affected the adsorption efficiency. Specifically, when 0.3 g of adsorbent (i.e., CK-WCTS and CK-ACTS) was used to test with 30 ml aqueous solution containing 380 ± 50 mg/L Ca(II) during 2 hours, the CK-ACTS showed more effective (i.e., Ca(II) removal of 34.73%) as compared to CK-WCTS (i.e., only 2.08%). In the case of As(III) removal, 0.5 g of adsorbent (i.e., pure ACTS and CK-ACTS composite) was applied to test with 50 ml artificial aqueous As (III) solution of 500 ± 50 μg/L during 90 mins of operation. The CK-ACTS composite also showed better performance since the highest removal As efficiency of 72% could be obtained after a contacting time of 45 mins, as compared to that produced by pure ACTS (i.e. As removal of 42.42%). The SEM analysis was also conducted to compare the difference in morphology of pure ACTS and CK-ACTS composite.
Development of low-cost air particulate IoT measurement using HM-3301 sensor
Authors: Yu Kok Hwa , Yen Kin Sam , Leo Choe Peng , Ng Wei Lin , Nie Ying 
Published: June 2024

Abstract
Air quality measurement is essentially important to create a safe and healthier environment. In this study, the accuracy and precision of the Grove HM-3301 sensor were evaluated and compared with the data taken from a standard air quality monitoring meter. Using the low-cost air particulate measuring sensor, the measuring results of the PM1, PM2.5, and PM10 concentration was fairly accurate, with a relative bias smaller than 30 %. The accuracy of the HM-3301 sensor can be improved using single-point calibration, with relative bias reduced to the limit of 13 % as tested in the particle mass concentration limit within 500 μg/m3. With improved accuracy, the air particulate IoT system using the HM-3301 sensor can be employed in practical applications to assess air quality. With a development cost of 90 USD, the PM measurement IoT system is suitable to be applied in monitoring outdoor and indoor air quality.
Water-Energy Nexus Flow Analysis of a Wastewater Treatment Plant in Thailand
Authors: Sakti A Y N , Babel S , Laohhasurayotin K , Opaprakasit P 
Published: June 2024

Abstract
The Wastewater Treatment Plant in Thailand plays a vital role in treating raw domestic wastewater. As the demand for treating wastewater grows, the energy requirements associated with treatment processes become essential. This study aims to identify energy-intensive areas in wastewater treatment plants and provide inventory data for the indirect environmental impact. It also determines the suitable opportunities to recover energy from wastewater treatment plants. The water-energy nexus was examined through Material Flow Analysis (MFA) using Substance Flow Analysis (STAN) Software. The wastewater treatment plant is extended to produce water for reuse. System allocation is adopted to separate the treated wastewater and reuse water products. In Thailand, the aeration tank unit is the most energy-intensive. This condition can be explained by operating the aeration tank, which accounts for 33.87% of the total energy demand. The research found that around 0.155 kWh/m3 is needed for treating raw domestic wastewater to meet the effluent standard. The extended treatment for converting the raw wastewater into reuse water requires 0.3286 kWh/m3. Reuse water is beneficial for providing sustainable water resources but requires a 112% energy increase. The plant relies on Thailand’s EGAT Energy Mix (58.09% Natural Gas, 29.01% Lignite, 10.21% Hydropower, 2.52% Diesel, 0.16% Fuel Oil, 0.002% Geothermal Energy and 0.008% remain unidentified). Rather than fully relying on Thailand EGAT, the research suggests renewable energy installations and nutrient recovery options. Solar panels and micro-hydro power generation are promising ideas to install. Moreover, recovering the nutrients from wastewater can address environmental problems and offer valuable resources simultaneously. The findings of this Study provide profound benefits for developing sustainability in wastewater treatment plants.
Ergonomics assessment of loading and unloading bagged cargoes: Case study at Sai Gon Port
Authors: Nguyen P L 
Published: June 2024

Abstract
Musculoskeletal disorders (MSDs) are a prevalent global health issue, affecting workers in various industries, including port workers. The 28 labor postures are divided into independent manual loading and unloading, coordinated manual loading and unloading, and conveyor loading and unloading. Bagged loading and unloading personnel at Vietnam’s Saigon Port are assessed using OWAS, RULA, and REBA methods. 46.4% of unreasonable postures require further analysis, and 53.6% of exceptional inappropriate positions require adjustment. Replace manual and conveyor belt loading and unloading workgroups based on lifting weight and operational constraints, within a narrow range of recommendations. The chronic risk of MSDs in workers’ appearance is 43%, with an Orebro average score of 100.87±1.21 points, compared to 118,38±1,17 points in the disease group. The average pain location is 4.64±0.23 locations. The most painful positions in the workers were recorded: low back (58%), shoulder (57%), and neck (55%). The 8 main factors that affect the MSDs in objective workers are job satisfaction (10.71%); kneeling frequency (8.61%); positioning loads on the left shoulder (7.43%); hook usage frequency (5.86%); sex life frequency (3.79%); noise impact (3.11%); fatigue (3.02%); the number of working days per week (2.88%).
Traffic emissions before and after development based on traffic impact assessment
Authors: Leong L V , Mohd Shafie S A 
Published: June 2024

Abstract
Traffic impact assessment evaluates the traffic conditions in the vicinity before and after the completion of a new development as new development will generate additional vehicle trips on the road and contribute to a rise in traffic emission. Thus, this study aims to evaluate the impact of the proposed development in Nibong Tebal, Penang, on the existing road network and identify the necessary improvements to ensure all intersections perform satisfactorily. Additionally, the impact of the proposed intersection’s design on fuel consumption and traffic emissions will also be investigated. During morning and evening rush hours, six hours manual vehicle counts were conducted at ten intersections. The collected data is then analyzed to determine the performance of the intersection. The level of service, based on the delay and ratio of volume over capacity of a turning movement, is used as the performance indicator for intersections. This study revealed that the reduction of delay time of more than 100 seconds at signalized intersections can significantly reduce fuel consumption and traffic emissions. In conclusion, a well-designed intersection will facilitate traffic movement and reduce traffic emissions which will eventually reduce the quantity of greenhouse gases released into the atmosphere that contribute to global climate change.
Dynamical active particles in the overdamped limit
Authors: Fieguth Diego M 
Published: June 2024

Abstract
Mobile microscopic bodies, such as motile cells, can be modelled phenomenologically as ‘active particles’ which can move against external forces by depleting an internal energy depot. The microscopic mechanisms underlying such ‘active’ behaviour must ultimately obey fundamental physics: energy depots must actually consist of dynamical degrees of freedom, such as chemical reaction coordinates, which in some way couple to the particle’s motional degrees of freedom. As a step towards connecting phenomenological models with microscopic dynamical mechanisms, recent papers have studied the minimalistic dynamical mechanism of a ‘dynamical active particle’, and shown how nonlinear couplings can allow steady energy transfer from depot to motion, even in the presence of weak dissipation. Most real active particles move through viscous environments, however, and are strongly damped. Here we therefore generalize the dynamical active particle into the overdamped regime. We find that its mechanism still operates, and in particular allows the overdamped active particle to travel just as far against friction as the undamped model, by moving at a slower average speed. Our results suggest that active particle phenomenology can indeed be consistent with comprehensible dynamical mechanisms, even in strongly dissipative environments.