bluuebunny/crossref_metadata_2025_split huggingface dataset:
Geodiversity Assessment of Widodaren Spring: A Treasure Trove Site for Bromo Tengger Volcano’s Future Geopark
Authors: Haris Miftakhul Fajar M. , Budi Santoso Eko , Ulumuddin Faqih , Kusuma Rahayu Helda , Wirayudhatama Mahendra , Khairia Alfany Marsha , Erfand Dzulfiqar Rafi Muhammad , Zakiyyah Zukhrufah Syabibah 
Published: December 2024

Abstract
The Bromo Tengger Volcano in Indonesia, a prominent geotourism spot, features the notable Widodaren Spring within its caldera, originating from the inactive Widodaren Vulcanic Cone. This study evaluated the geodiversity of Widodaren Spring through field and laboratory analyses and identified geodiversity elements by assessing their potential educational utility (PEU), potential touristic utility (PTU), and degradation risk (DR). Widodaren Spring is unique, showcasing rocks, hydrogeology, and landscape elements. This location is composed of pyroclastic fall deposits and pyroclastic surges, which characterize the products of volcanic activity on this volcano and provide a Sea of Sand Caldera landscape. Field and laboratory data indicate that this spring is genetically topographic-stratigraphic and hydrochemically calcium-chloride-type. The high levels of sulfate-chloride in the groundwater samples suggest the influence of volcanic gases from the nearby Bromo Volcanic Cone. Rainwater infiltration at the upper cone (2400-2560 meters) flows through lapilli layers serving as aquifers, with tuff and lapilli tuff layers below being impermeable to semi-permeable. Geodiversity assessments revealed a high educational utility potential (PEU) of 310 points, medium tourist utility potential (PTU) of 260 points, and low degradation risk (DR) of 135 points. The high PEU score was attributed to the site’s unique geological elements, making it valuable for education and science. The medium PTU score reflects its location in a national park, limiting accessibility but protecting it from human-caused damage. Potential natural damage may arise from weathering and volcanic eruptions on Mount Bromo. In conclusion, Widodaren Spring possesses significant geodiversity value with great potential for education and tourism, alongside a minimal risk of degradation. This site is a treasure trove for the future Bromo-Tengger Volcano geopark.
A Study of Lineament Density and Correlation Residual Gravity Anomalies to Identify Pacul Fault in Mount Pandan, East Java
Authors: Naufal Muhammad Z. , Pandu Gya Nur Rochman Juan , Triahadini Agnis , Achsan Faiz M. , Dewi Maulida K. , Ashari Dwiska Calvin , Erick Asyari M. 
Published: December 2024

Abstract
This study analyzes the identified Pacul Fault using lineament density and residual gravity anomalies in Mount Pandan, East Java. The study utilizes DEMNAS data, geological data, and gravity satellites. The research process includes creating hill shades from DEM data, extracting lineaments using PCI Geomatica software, and interpolating data to create a lineament density map. Further analysis correlates lineament density and residual anomaly with the fault zone around the Pacul Fault. The results show that fault zones are located in areas with moderate to high lineament density and at anomaly contrast from residual anomaly. The complete Bouguer anomaly map indicates low anomalies likely representing fault planes. This study confirms a positive correlation between lineament density and contrast anomaly according to the pacul fault presence of Mount Pandan.
Comparison of multitemporal multifrequency multibeam echosounder norbit iwbms: depth and sedimentation rate analysis of selorejo reservoir 2022-2023
Authors: Khomsin  , Nuradi Ikhsan 
Published: December 2024

Abstract
Selorejo Reservoir is a reservoir constructed and located in Pandansari Village, Ngantang District, Malang Regency, East Java. The Indonesian Government built this reservoir to accommodate the water flow from several rivers, including the Konto River, Kletak Lahar, Kwayangan River, and several other small rivers. The biggest challenge for a reservoir, where the primary clean water source comes directly from rivers, is siltation caused by sediment accumulation at the bottom of the water body. Therefore, severe and continuous control in the reservoir area is necessary to prevent damage and overflow and ensure the community’s safety by engaging in activities around the Selorejo Reservoir. Bathymetric surveys are essential in obtaining information related to marine fields and precise depth values with spatial references. When using a multibeam echosounder, surveyors must consider several aspects regarding the specifications of the equipment before data acquisition, one of which is the frequency used. Different frequencies result in different penetration abilities and data quality. This study aims to estimate the sedimentation rate in the Selorejo Reservoir using multitemporal data and investigate the effect of using multifrequency on the depth measurement results obtained. The results of this study indicate that the higher the frequency used, the shallower the depth value obtained. Higher frequencies provide better representation in object detection capabilities. At the same time, the sedimentation rate was relatively high, from 3.2 to 5.3 centimetres per month.
Advanced Detection of Underwater Gas Seep Sites Through Multibeam Echosounder Water Column Data and Numerical Analysis
Authors: Eka Adriyanti Syalsabila , Hana Hariyanto Irena 
Published: December 2024

Abstract
Water column imaging of multibeam echosounder systems (MBES) are sensitive and potential devices for investigating free gas bubbles release and their ascent up the water column. These data could demonstrate previously undetected characteristics on the water’s surface and seabed which are related to Sustainable Development Goal 14 about life below water. The research utilizes a MBES to map the volume of seabed gas emission bubbles in the Adriatic Sea, Italy, using water column data. The survey covered 1.5 km2 around a four-legged gas platform at a depth of 77 meters. To achieve a 50% overlap, ten parallel transects of 1.5 km each were used, with a vessel speed range of 2-2.6 m/s and a transect spacing of 100 m. Acoustic waves from seabed seepage were visualized using water column data, with reflection intensities ranging from −63.5 dB to 29 dB, reflecting the acoustic reflectance of various suspended materials. More precise thresholds were obtained by filtering and clustering the gas bubbles using the point weight approach to separate them from the noise and water bubbles. The uneven Digital Terrain Model (DTM) indicates gas emissions through water column data. The volume of gas bubbles was determined by visualizing the points in a 3D format using XYZ coordinates. Through interpolation techniques and 3D volumetric analysis, six bubble locations were obtained with volumes of 651.12 m3, 108.30 m3, 42.00 m3, 167.20 m3, 186.00 m3, 287.81 m3, and 45.00 m3. This study is crucial because it questions the methods of Carbon Capture and Storage (CCS) by investigating the discharge of carbon into the sea. Furthermore, this study helps to identify emission sources, measure the volume of released gas, and explain the depth distribution of emissions, providing essential data for marine CCS assessment.
Integration of WebODM Platform as Photogrammetry Cloud Processing and GeoNode as Corporate Spatial Data Infrastructure to Support the Acceleration of Geospatial Data Communication Flow in PT. Waskita Karya Tbk.
Authors: Yudha Wahyu Saputra Galih , Amirrudin Ahmad Ali , Lyhardo Sidabutar Yosevel , Shelvira Herwieany Agnes 
Published: December 2024

Abstract
This research explores the integration of two platforms, namely WebODM and GeoNode, with Geoserver as its connecting platform. This platform integration is a solution to support the acceleration of geospatial data communication flow in PT. Waskita Karya Tbk. The main objective of the research is to combine the advantages of Photogrammetry Cloud Processing owned by WebODM with the Spatial Data Infrastructure features owned by GeoNode, thus creating an efficient and integrated system for processing and storing geospatial data. The research methodology involves user needs analysis, system integration development, as well as testing and performance evaluation of the implemented system. The research results indicate that the integration of WebODM and GeoNode has successfully created an environment that allows users to easily perform cloud-based photogrammetry processes and efficiently store and share geospatial data. With this system, PT. Waskita Karya can improve its operational performance in terms of geospatial data processing and distribution, as well as accelerate communication flow between various involved units. The implication of this research is that platform integration like this can be an effective solution for companies managing geospatial data on a large scale.
Evaluation of an automated vessel recognition system: case study in Port of Cristo
Authors: Maglić Livia , Maglić Lovro , Blažina Antonio , Ognjanović Ivana 
Published: December 2024

Abstract
An automated vessel recognition system is a sophisticated technological solution for the automatic detection, identification, and classification of vessels in a maritime environment. This paper presents the evaluation of an automatic vessel recognition system implemented in the Port of Cristo on the island of Mallorca in Spain. The system employs PTZ camera and algorithm for image analysis and object recognition to accurately detect, classify and track different types of small vessels entering or departing from the port. The results revealed that the system successfully detected the event of the arrival and departure of vessels in 95% of the cases. In addition, the system was able to identify the vessel by recognizing the registration number in 75.81% of the cases and classifying the vessel type in 89.07% of the cases. The paper presents the SWOT analysis based on the knowledge and experience gained during the testing period.
System Theory and Human Factors Hazard Identification Approach for Marine Survey Operation
Authors: Waskito Dwitya Harits , Faishal Muhammad , Handoyo Tris , Kurniawan Indra , Hamonangan Julianto Saut 
Published: December 2024

Abstract
Marine survey operation is one of the most frequent and essential activities in enhancing ocean knowledge. Some dangerous tasks and activities involve scientists, marine crews, survey equipment, and sensors, such as deploying equipment near the seabed, collecting the sediment sample, and towing the equipment with the ship’s movement. Since it consists of several controllers and components, the comprehensive system theory must be applied to analyse the risk, and the effect of human error must be incorporated as the equipment’s controller within the system. This study provides a holistic hazard identiMication of marine survey operation by using System Theory Process and Analysis (STPA) and integrating it with the Human Factors ClassiMication System (HFACS) to deMine the unsafe control actions (UCA) and failure scenarios. According to the STPA, 194 UCAs could occur. The main causal factors of the UCAs are human and followed by technical errors. The STPA-HFACS analysis indicated that additional human and equipment actions would have a detrimental effect on the failures of the operation. This study will beneMit stakeholders in marine survey operations with an alternative method for risk analysis.
Identification of Ship Domain Shape to Degree of Ship Collision Risk on Head-on Encounter Situation
Authors: Hermawan Yuda Apri , Pratama Fernanda Wahyu , Nugroho Setyo , Widjaja Sjarief , Yulianto Totok , Purwanto Dedi Budi 
Published: December 2024

Abstract
Ship collisions are one of the marine accidents that can occur at any time, causing significant material and cargo losses. Lack of awareness of collision impacts and human factors are primary issues for ship collisions. Consequently, ship captains and technology have devised an imaginary area known as the ship domain. This ship domain is an imagined region used to define safe conditions around the ship. With the presence of a ship domain, collision risk can be reduced. This paper investigates the influence of ship domains on collision risk assessment during head-on encounters. To simulate realistic ship movement conditions, the manoeuvring mathematical group (MMG) model is used to predict ship movements. Additionally, fuzzy logic calculations and the closest point of approach (CPA) are employed to help identify the effectiveness of ship domains. Numerical simulations are conducted using three different ship domain shapes: egg, circle, and ellipse. The results indicate that the shape of the ship domain does not significantly influence collision risk assessment in head-on encounters. Instead, the division of the ship domain plays a more crucial role in evaluating ship collision risk.
Formal Safety Assessment (FSA) for ship collision in Musi River
Authors: Nugroho TF , Artana KB , Dinariyana AAB , Gurning S , Mas’ud MAA 
Published: December 2024

Abstract
Accident data from the Palembang Port Authority Of6ice Class II shows that the level of traf6ic accidents in the waters of the Musi River in Palembang is relatively high. Hazard identi6ication was conducted on the Musi River, resulting in 25 ship accidents caused by collisions and 4 ship accidents due to grounding. Subsequently, risk assessment was performed by analysing the collision frequency and its consequences on human casualties. The collision frequency was calculated using IWRAP, yielding results of 8.18 x 10-2, 9.74 x 10-3, and 8.18 x 10-4 for the head-on, overtaking, and crossing scenarios, respectively. An analysis of the consequences in terms of human casualties estimated an average of 11 victims. Six options were proposed as risk control options (RCOs): public awareness and regulation implementation, Automatic Identi6ication System (AIS) installation, crew education and training, standardization of safety equipment, utilization of pilotage services, and channel widening. Each RCO will be evaluated based on its cost and bene6its. The 6inal stage of the FSA involves recommendations aimed at selecting the best RCOs, considering the cost-bene6it analysis (CBA). The optimal choice to minimize ship collisions and human casualties in the waters of the Musi River is to conduct crew education and training. This option is the most cost-effective due to its lowest Gross Cost value. The bene6its gained amount to USD 890,273.02 with a 68% reduction in risk value.
Air quality monitoring and assessment based on AIS data
Authors: Maulidi A , Sambodho K , Dinariyana A A B , Ilmah A M 
Published: December 2024

Abstract
Indonesia is an archipelagic country, where sea transportation is highly needed to connect the islands among Indonesian regions. Indonesian waters are also passed by international shipping passing through the Indonesia Archipelagic Sea Lane. Number of ships tends to increase by increasing the economic activities in Indonesia. The increasing number of ships will potentially cause the increase of air pollution in Indonesia waters. AIS consortium has been established since 2020 focusing on conducting join research and development on several issues that can be solved using Automatic Identification System (AIS) data gathered from AIS devices that have been installed in several universities as members of the consortium. One potential use of AIS data is the estimation of capacity and spreading of air pollution caused by shipping activities in Indonesia waters. As AIS can provide ship’s navigation status time-to-time, the estimation of fuel consumption as well as the emission can be estimated in real time. For highly accusation fuel oil consumption prediction is done by using the Random Forest Model and ship emissions including CO2, NO2, SO2, PM2.5, and PM10 are estimated based on emission factors from ships. This analysis is mapping the contribution of air pollution based on ship type in the Tanjung Perak port area. Later, it is expected to become the basis for Indonesia’s maritime operation policy in order to monitor and control the emission contributed by the ships in Indonesian waters.
Risk Analysis of Coral Reef Damage Area due to Grounding Incidents in Karimunjawa National Park
Authors: Prastyasari F I , Dinariyana Dwi Putranta AAB , Arifah E B Z 
Published: December 2024

Abstract
The designation of Karimunjawa as a National Park in 1999 does not prevent any shipping activities performed by barges, passenger ship, LCT, or even tanker from entering Karimunjawa waters. Such condition can cause damages to coral reefs if the ship run aground. In addition, the possibility of coral reefs contamination due to tourists activities such as diving that requires vessels to transport them. Based on the historical data from 2017 until 2023, fourteen cases of vessel grounding in Karimunjawa were recorded. This study comprises of hazard identiLication, frequency analysis, severity analysis, and risk representation. The simulation result of IWRAP Mk2 shows that the grounding incident in Karimunjawa is 3.736 incidents/year. Meanwhile the projected coral reefs area that affected by the grounding incident reached 0.55% from the total coverage. Based on Risk Management Australia AS/NZS 4360 (2004), the results showed that support vessels have high risk of grounding, followed by passenger ships with a moderate risk level. Tankers and other types of vessels were found to have a low risk of grounding.
Assessing the Proposed Designation of Nusa Penida and Gili Matra in the Lombok Strait as a Particularly Sensitive Sea Area (PSSA)
Authors: Pratiwi Emmy , Prastyasari Fadilla I. , Wijayanto Danuja , Dinariyana AAB , Saptarini Dian 
Published: December 2024

Abstract
The Lombok Strait, located in the Indonesian Archipelagic Sea Lane (IASL) II, serves as an international shipping route and is also crossed by ferries between Bali and Lombok Islands. The potential increase in international shipping trafBic could pose a threat of marine pollution due to shipping activities, such as ship accidents and operational discharges from ships. There are two areas in the Lombok Strait that have been designated as national marine conservation areas by the Indonesia government, namely Nusa Penida Island and Gili Matra Island. The rich marine biodiversity of the Lombok Strait, especially in Nusa Penida and the Gili Islands, should be protected from the threats posed by international shipping activities. This study aims to assess the necessity of designating the Lombok Strait as a Particularly Sensitive Sea Area (PSSA). The newly established routing systems, TrafBic Separation Schemes (TSS) in the Lombok Strait, can be adopted as Associated Protective Measures (APMs) within the designation of a PSSA. Risk assessment was implemented to demonstrate the exposed risks of international shipping activities that could threaten the marine ecosystem and evaluate the effectiveness of the TSS as an associated protective measure. Based on reviews to meet at least one of the criteria for designation as a PSSA, Nusa Penida and Gili Matra have its the signiBicance of its ecological, socio-economic & culture, and marine trafBic characteristics. The total annual frequency of ship collision is 3.32E-03. In conclusion, the implementation of TSS as the existing APM has proven effective in reducing the risk of ship collision in Lombok Straits by 60.3% compared to frequency ship collision before TSS.
Analysis of camber ratio variation on B-Series propeller performance by using combined panel-vortex method and blade-element theory
Authors: Indiaryanto M , Suastika I K , Setyanto T A 
Published: December 2024

Abstract
The camber ratio of a propeller significantly affects its hydrodynamic performance. The camber ratio particularly affects the lift force generated by the propeller blades, which ultimately affects the propeller thrust and torque. In this study, effects of camber ratio variations are investigated by using a combined method of panel vortex method and blade element theory. The camber ratios considered in this study are as follows: 0% (0.00, original foil), 1.6% (0.016), 2.2% (0.022), and 2.8% (0.028). A larger camber ratio results in a more convex propeller blade surface. Calculation results show that the larger the camber ratio, the higher the thrust and torque coefficients. The camber ratio of 2.2% (0.022) gives the highest propeller efficiency of 58.5% at the advance coefficient J = 0.7.
Integration of Hand Motion Sensor, Artificial Intelligence, and QR Code for Real-Time Monitoring of Welder’s Performance and Welding Quality: A Conceptual Framework
Authors: Aji Adi Sasmito , Pribadi Triwilaswandio Wuruk , Baihaqi Imam 
Published: December 2024

Abstract
The welding quality, as the product of manual or semi-automatic welding process, is highly affected by the hand motion of the welders. In the shipbuilding industry, the welding inspection process is commonly performed after the welding process is finished by the welding inspectors. The research aims to develop a realtime monitoring system for welder’s performance by recording their hand motion. The hand motion sensors and QR codes are integrated through the Internet of Things (IoT) to monitor the welder’s performance and weldment quality. The realtime monitoring concept was developed by designing the monitoring concept utilising the QR code and Android mobile smartphone. The welder’s hands are equipped with the Inertial Measurement Unit (IMU) sensor to record their hand motion. The motion data are transferred directly from the IMU sensor to the smartphone storage through a Bluetooth connection. The data then are uploaded to the cloud storage through the internet connection. The stored recorded data was then analysed and compared with the qualified welders’ hand motions. After welding ends, the welder reports the visual appearance of the weldment and its location as identified by the QR code through the Android system. Finally, the functionality of the application prototype is tested, and the results show that the system can be used practically for real-time monitoring of welder performance and welding quality.
Deep Learning CNN-LSTM Approach for Identifying Welder’s Hand Motion Gestures Using Wearable Sensors
Authors: Virmansyah Vialdo Muhammad , Pribadi Triwilaswandio Wuruk , Baihaqi Imam 
Published: December 2024

Abstract
A welder plays a crucial role in the construction of a new ship. Monitoring the performance of welders involved in the construction of a ship is particularly important for controlling dimensions. he competency and consistency of welders play a vital role, with specific hand movement patterns contributing to welding quality. This study aims to identify individual welders’ hand movement patterns using Deep Learning with CNN-LSTM configurations. Data was collected through IMU motion sensors attached to welders’ wrists, capturing acceleration, angular speed, magnetic force, and electric current changes. The data was classified using CNN-LSTM, which showed higher accuracy than SVM methods. Experimental results indicated an overall classification accuracy of 99.73% for identifying individual welders and 97.07% for determining welding positions.