bluuebunny/crossref_metadata_2025_split huggingface dataset:
Development review of Sieverts-type equipment for studying adsorption and desorption measurements of hydrogen storage in solids
Authors: Kurniawan  , Pranoto H , Darsono N , Budiman A H , Khaerudini D S 
Published: February 2025

Abstract
Hydrogen is a promising medium for energy storage and a viable alternative fuel source. Despite extensive research in its production, storage, distribution, and utilization, achieving safe and efficient hydrogen storage remains a significant challenge. This review examines recent advancements in Sieverts-type apparatus used for measuring solid-state hydrogen storage, focusing on various designs and configurations to determine optimal setups for precise hydrogen adsorption and desorption measurements. The use of metal-organic frameworks (MOFs) for hydrogen storage has garnered considerable interest in recent years. Advances in solid-state hydrogen storage, particularly through the use of nanomaterials, have demonstrated potential to meet the economic and application-specific targets. This review discusses several volumetric measurement designs, highlighting an optimal configuration that includes Cooling System (A3), Cost (B1), Valve Configuration (C3), and identified difficulties (D1) in the development of devices for hydrogen adsorption and desorption. Furthermore, conducting experimental studies will be crucial in verifying the accuracy and reliability of these simulated results, ensuring that theoretical predictions are applicable to real-world scenarios.
Prototype for Detecting Rhodamine B Levels in Syrup Using Filter Paper Test Media
Authors: Rosdiana E , Kusumaningtyas V A , Purbowati E , Andini R I , Rahman F 
Published: February 2025

Abstract
Rhodamine B is a synthetic dye commonly utilized in the textile, paper, paint, cosmetics, and soap industries. However, it is sometimes found in food and beverages to enhance their visual appeal to consumers. Long-term consumption of Rhodamine B can lead to liver and kidney disorders and may even result in liver cancer. One of the challenges consumers face in monitoring Rhodamine B consumption is the lack of simple tools that enable the general public to perform such testing. A prototype has been designed to detect Rhodamine B dye levels in syrup using filter paper as the testing medium, with the output displayed in terms of Rhodamine B concentration in parts per million (ppm). The device is intended to be user-friendly for the general public. It operates by reading sensor data from the test medium after it has been dipped into the sample. The current detected by the sensor is converted into a frequency by a microcontroller, which then displays the concentration in ppm on an LCD screen according to predetermined RGB value ranges coded into the microcontroller. Testing was conducted on 25 samples with concentration variations of 0 ppm, 30 ppm, 60 ppm, 90 ppm, and 210 ppm. The results showed a decreasing range of RGB values with increasing Rhodamine B concentration, specifically 0 ppm (R=219-220, G=223-225, B=220-222); 30 ppm (R=218-219, G=207-208, B=208-209); 60 ppm (R=215-218, G=197-204, B=203-206); 90 ppm (R=212-214, G=181-182, B=193-196); and 210 ppm (R=210-211, G=162-163, B=188-191). Additionally, UV-VIS spectrometer testing indicated an increase in absorbance values with higher ppm concentrations: 0 ppm (0), 90 ppm (0.529), 240 ppm (1.088), and 360 ppm (1.574). Based on this data, the prototype for detecting Rhodamine B in syrup using filter paper as a medium has been successfully developed. This study established an optimal working distance range for the sensor, positioning the sample medium between 1.25 and 1.5 cm to achieve accurate RGB value readings. The instrument effectively detects Rhodamine B concentrations in test samples based on RGB values read by the sensor, covering a concentration range of 0 to 210 ppm. UV-Vis absorbance testing of Rhodamine B in syrup further validated and confirmed the accuracy of the developed system.
Use of Multinode Sensors in an Internet of Things (Iot) Based Temperature Monitoring System for a Ball Tea Machine
Authors: Ramadhan M R S , Akbar I N , Suyatna S F , Octaviani Y , Suhendi A , Fitriyanti N 
Published: February 2025

Abstract
Green Tea is a widely consumed globally and is especially popular in regions where it is cultivated. The final stage of green tea processing is drying, commonly performed with ia Ball Tea machine. The drying process typically lasts between 8 to 15 hours at an ideal temperature range of 100 to 130 degrees Celsius. It is crucial to monitor the temperature of the Ball Tea machine throughout the drying process to ensure that it remains within the optimal range. This study aims to develop an IoT-based multinode sensor temperature monitoring system capable of real-time monitoring both on-site and remotely. The system utilizes an RTD PT-100 temperature sensor, which has a measurement range from -50°C to 400°C. In addition, remote monitoring can be conducted via a website and mobile applications. The system provides temperature data in both numerical and graphical formats on these platforms and includes features such as notifications for when the temperature deviates from the optimal range. The system was tested on spray drying machine, which shares similar functionalities with a Ball Tea machine, to validate its efficacy. Performance evaluations included testing device communication as well as the performance of the website and mobile applications. The devices are interconnected through a Wireless Sensor Network (WSN). The Quality of Service (QoS) analysis indicated a satisfactory QoS Index of 3 under both line-of-sight (LOS) and non-line-of-sight (NLOS) conditions. User feedback on the website and mobile applications was generally positive, though performance may vary depending on the user’s device.
Dynamic response analysis of natural gas boilers under seismic loads
Authors: Chunxiang Gan , Pan Li , Jianrun Zhang , Xi Lu 
Published: February 2025

Abstract
This paper establishes a dynamic response analysis model of natural gas boilers composed of shell elements and beam elements. Stress, and deformation under the effects of self-weight, temperature loads, and seismic loads are used as evaluation indicators. The strength of natural gas boilers under two working conditions: hot state with low load, and full load, is analyzed. The results indicate that the boiler has high stiffness in the vertical direction, while the lower part of the rear wall is a relatively weak point in terms of stiffness. This provides a reference for further optimization of the boiler structure. Additionally, it was found that the first natural frequency of the boiler decreased by 36.7% and 38.1% compared to the static and free modes, respectively, after applying thermal loads, indicating a significant reduction in the stiffness of the boiler when heated.
Structural design and LCF lifetime prediction of simulating specimen for the tenon tooth of nickel-based single crystal turbine blade
Authors: Li M R , Wang R Q , Zhang B , Zhao Y , Hu D Y , Mao J X 
Published: February 2025

Abstract
In this study, the structural design, low-cycle fatigue (LCF) experiments and lifetime prediction of simulating specimens for the tenon tooth chamfer of a nicked-based single crystal turbine blade were conducted. Firstly, a crystal plasticity constitutive analysis of the turbine blade was performed to identify hotspots under in-service operating conditions. Then, ensuring consistency in geometric structure and lifetime-related parameter, a simulating specimen was designed. Comparing the finite element simulation results of the stress concentration area of the simulating specimen and the tenon tooth chamfer of the turbine blade, the error in the lifetime-related parameter was less than 4.75%, demonstrating that the designed simulating specimen achieved lifetime equivalence for the tenon tooth chamfer. Moreover, a modified method for determining critical distance that considers the influence of notch size was established based on the theory of critical distance (TCD). By combining this method with the slip-based damage model, the LCF lifetime of notched specimens and simulating specimens was accurately predicted.
Design of a Hydraulic Turbine Based in a Pressure Swirl Chamber using Ansys CFD
Authors: Calzada D , Uribe A , Ronceros J , Namay W , Zapata G , Raymundo C 
Published: February 2025

Abstract
This study presents the simulation of internal flow of a hydraulic turbine using CFD based on pressure-swirl atomizer technology, typically used in combustion chambers of rocket engines. The proposed model is equipped with a swirl chamber with stabilizer included, dual manifold system and a rotor, each of these elements will be simulated to validate its functionality, prior to implementation and subsequent experimental testing. The results show that it is possible to produce the spray output jet even if there are interferences within the swirl chamber such as the rotor itself and the stabilizer. In addition, due to the tangential speeds produced within the atomizer may be viable to place a rotor to produce mechanical power. This study serves as a starting point to carry out future experimental tests to validate the generated power and efficiency of the proposed system. The results presented in the document were validated using mathematical equations and numerical simulations using the Ansys Fluent software.
Neutron spectrometry with DIAMON detector for characterisation of a newly built neutron calibration facility at SCK CEN
Authors: Pinasti Sita Gandes , Hoey Olivier Van , Mihailescu Liviu-Cristian , Vanhavere Filip , Pauly Nicolas 
Published: February 2025

Abstract
Personal neutron dosimeters often experience significant
overestimation or underestimation when used in neutron fields that
differ from those in which they were calibrated. This discrepancy
highlights the highly field-dependent nature of these dosimeters and
the necessity for precise neutron field characterisation to ensure
accurate calibration and reliable dosimetry. In this study, we
conducted a comprehensive neutron field characterisation at the
newly constructed neutron room of the Secondary Standard Dosimetry
Laboratory (SSDL) of SCK CEN, Belgium, using 252Cf and
241Am-Be sources. The DIAMON neutron spectrometer and Bonner
Sphere Spectrometer (BSS) were employed, alongside Monte Carlo
simulations. The primary objectives were to evaluate the performance
of the DIAMON spectrometer against the BSS, which serve as the gold
standard, and to validate the simulation model of the neutron
room. The shadow cone method was utilised to separate direct and
scattered neutron components. Monte Carlo simulations using the
PHITS code, which mimicked the actual neutron room geometry,
materials, and sources, were conducted to develop the neutron room
model which is validated by the measurements. Analysis of neutron
ambient dose equivalent rates from both sources, in terms of direct
neutron under controlled scatter conditions (in this case, below 3
m), revealed that DIAMON measurements agreed with LNK reference
values within a 16% margin. The deviations of BSS measurements and
PHITS simulations from the LNK reference values were kept within
19% and 10%, respectively. These findings demonstrate the
reliability of the DIAMON spectrometer and the robustness of the
PHITS simulation model.
Participatory Mapping of Mangrove Ecosystem in Tengin Baru Village, Indonesia Capital City
Authors: Annisa Choiriatun Nur , Kusuma Fitria Dewi , Hapsari Marya Tiara , Diana Rita , Sofyan Fenny Putri Mariani 
Published: February 2025

Abstract
Tengin Baru is located in the development area of Indonesia Capital City (Ibu Kota Nusantara, IKN). The village covers a small part of the mangrove ecosystem in the region which currently utilised for other uses by the people. In order to implement a sustainable approach of the mangrove management, the involvement of the locals in mapping the land use of the village could produce a more aligned mapping with the latest social conditions and helps identify field issues. The mapping could also be used as the basis for the village development planning considering its strategic and important situation in the IKN area. The objectives of the study were to identify the mangrove cover and other land use in Tengin Baru Village and its issues. The results showed that most of the land is forest and mangrove covered around 134.17 hectares (2.2% of the village area) at the southern part of the village. The mangrove was dense and in good condition with one of the species (Nypa fruticans) harvested for making roofs. The issues regarding the village land use included the development of Sepaku Semoi Dam to supply water to IKN and the masterplan of the village as the centre for tourism and economic growth of the region. The village planned to protect mangrove and build fishing ponds for mangrove tourism attraction.
Insectivorous birds in the Sungai Wain Protection Forest of East Kalimantan, Indonesia
Authors: Sarwani Ahmad , Rustam  , Boer Chandradewana , Sutedjo  , Rahman Yusril Bagus Taufiku , Agusdin  , Suba Rachmat Budiwijaya 
Published: February 2025

Abstract
Birds are one of the objects of biodiversity conservation because they function to maintain the stability of the ecosystem, one of which is insectivorous birds. Research on this group of birds was conducted in the Sungai Wain Protection Forest (SWPF). The data collection was conducted by point observation on two ecotourism trails in SWPF, starting from the entrance of the trail and every 100 m to ± 1 km. Observations at each point were carried out from 11 pm to 9 am GMT and repeated for 6 days. We also observed the perch height and the height of the pole or tree where the object was perched. The presence frequency ranged from 8.33-75.00%, Dicrurus paradiseus is the highest (frequent), followed by Rhipidura javanica (58.33%), Stachyris erythroptera (50.00%), Hirundo rustica (50.00%), H. tahitica (50.00%), Mixornis gularis (41.67%), and Meiglyptes tukki (41.67%). About 61.76% of the insectivorous birds were categorized as rare, including Pityriasis gymnocephala which is endemic to Borneo. The observed occupancy proportion ranged from 5-30%, R. javanica is the highest (30%), followed by D. paradiseus (25%), S. erythroptera and M. gularis (20.00%). The diversity index (H’) was 3.085 (categorized as high). Insectivorous bird perch height is positively correlated with the height of the habitus utilized, reflecting the consistency of stratum utilization by insectivorous bird species in SWPF. Although the main function of SWPF is related to hidrological regulation, by maintaining forest cover, the function of preserving biodiversity will also have a real impact.
Effectiveness of Nature-Based Solution Implementation for Flood Disaster Mitigation in Jakarta, Indonesia
Authors: Shindi Mohammad Firzat , Wijaya Nurrohman , Ikhsan Muhamad 
Published: February 2025

Abstract
Climate change exacerbates the risk of urban disasters globally, particularly in cities of the Global South like Jakarta, Indonesia, undergoing rapid urbanization. Among Jakarta’s significant challenges are recurrent floods stemming from climate change and swift land use development. Nature-based Solutions (NbS) coupled with hybrid infrastructure approaches emerge as imperative, adaptive measures for the city. This study employs a mixed-method research framework, combining qualitative and quantitative methodologies. Qualitative techniques are utilized to delineate parameters for assessing the efficacy of NbS implementation and formulating flood disaster management strategies. Conversely, quantitative methods are applied to gauge the effectiveness of Jakarta’s existing and planned flood disaster management initiatives. The assessment of NbS implementation effectiveness in Jakarta revolves around three primary parameters: evaluation of green, grey, hybrid infrastructure, and policy/social dimensions. According to analysis outcomes, grey-based solutions are prioritized by the Jakarta local government for flood disaster mitigation. Flood disaster mitigation strategies in Jakarta encompass various approaches, including fortifying green and hybrid infrastructure, bolstering social and institutional dimensions, enhancing institutional capacity, and conducting periodic assessments. These endeavours aim to enhance urban sustainability and mitigate flood disasters in Jakarta effectively.
Realizing ecological justice in Urban Development Laws: Indonesian experiences and challenges to protect biodiversity in its new capital city
Authors: Safitri Myrna A. , Adiwijaya Achmad Jaka Santos 
Published: February 2025

Abstract
The new capital city of Indonesia, Nusantara, is being developed with the goal of creating a liveable city that is in harmony with nature. Nusantara is planned as a sustainable forest city, with 65% of the area designated as a protected zone. The forest city development strategy includes measures to control deforestation, promote reforestation, protect biodiversity, involve local and indigenous communities, and impose a moratorium on mining and plantation licenses. One of the main challenges in implementing these strategies is the condition of the forest ecosystems in the last decades, which have been damaged due to resource extraction and conversion of primary forests for various land uses. This has led to a threat to biodiversity and the habitat of endemic flora and fauna. Efforts are being made to establish a robust regulatory framework to achieve ecological justice goals by protecting biodiversity and local wisdom. This paper will present data, information, and analysis on existing land use, biodiversity potential, regulations, and policy rules aimed at protecting biodiversity and local wisdom. The special authority of Nusantara provides an opportunity to achieve ecological justice in development, but there are still challenges that need to be addressed, such as resolving socio-ecological problems due to past policy issues.
Antioxidant Activity of Mahang Leaves from Post-Coal Mining Revegetated Areas in East Kalimantan
Authors: Fikriah I , Masruhim M A , Marliana E , Panggabean A S , Ismail S , Kusuma I W , Paramita S 
Published: February 2025

Abstract
Coal is of great importance to Indonesia’s foreign exchange and the income sharing of East Kalimantan. However, its environmental effects, such as soil acidification, are causing problems. Reclamation measures entail using pioneer plants like Mahang trees or Macaranga tanarius, renowned for their therapeutic benefits in restoring vegetation. Nevertheless, the pharmacological characteristics of these plants are contingent upon soil factors. This study aimed to assess the antioxidant properties of Mahang leaves extracts obtained from a forest that has undergone post-coal mining, in addition to analyzing the soil characteristics. The antioxidant activity was evaluated using the DPPH radical scavenging test. Post-coal mining soil contained elevated levels of heavy metal concentrations. However, the DPPH radical scavenging test of Mahang leaves extract indicated significant antioxidant activity. Overall, non-toxic soils in forests that have undergone post-coal mining indicate an abundance of soil nutrients available for the growth of medicinal plants such as Mahang. The revegetation demonstrates the effectiveness of the land recovery process, which has resulted in thriving vegetation after ten years of revegetation.
The Role of Monitoring Carbon Storage and Sequestration in Advancing the Vision of Forest City: Lesson Learned from Urban Forest Assessment in Bandung, West Java
Authors: Akbar Indria Zhafirah , Afrianti Chairunnisa , Kaswanto Regan , Wiyoga Harityas , Mosyaftiani Amarizni 
Published: February 2025

Abstract
The conceptualization of Nusantara Capital City or Ibu Kota Nusantara (IKN) as a forest city represents a visionary approach towards sustainable urban development, wherein the city is designed to protect and preserve the ecological functions of the tropical ecosystem as an inspiration of living in harmony with nature. Mandated by Law of Republic of Indonesia Number 3 of 2022 on National Capital, the development of IKN must adhere to several guiding principles that are meant to support the reduction of greenhouse gas emissions and leveraging green spaces or forests in carbon absorption of the city. Within this context, urban forests serve as highly efficient carbon sinks that need to be managed properly based on scientific approaches. The experience of assessing urban forests using i-Tree Eco in Bandung City, West Java, can serve as a pilot-model and provide valuable insights into assessing carbon storage and sequestration, also greenspace monitoring for the IKN. This process demonstrates the ecological values of the vegetation in urban forests, with case study in Babakan Siliwangi Urban Forest. This case study plays a crucial role in mitigating carbon emissions, serving as an integral facet of urban landscapes that helps offset the carbon footprint associated with urban activities. Understanding the values of urban forests through tree monitoring is essential to provide valid data for urban forest management to make an informed decision towards achieving the IKN’s sustainability vision. In conclusion, the i-Tree Eco assessment could support city managers and policy makers in developing science-based strategies to achieve net zero emissions and envision a forest city.
Cost-Benefit Analysis of Corporate Investments in Tropical Forest Restoration
Authors: Andaru F Mario 
Published: February 2025

Abstract
This study conducts a cost-benefit analysis (CBA) of corporate investments in tropical forest restoration. As environmental and sustainability concerns rise, corporations increasingly recognize the importance of contributing to tropical forest restoration as part of their corporate social responsibility and sustainability strategies. However, decisions to invest in tropical forest restoration often involve complex economic considerations. Therefore, using a CBA approach, this research aims to evaluate whether the economic benefits of such investments outweigh the associated costs. The study identifies the benefits of investing in tropical forest restoration, including carbon sequestration, biodiversity protection, and enhanced well-being of local communities, alongside measuring implementation costs such as planting, maintenance, and administrative expenses. Through empirical data and relevant economic analysis tools, we calculate the net benefits of these investments. The findings provide insights into the economic effects of corporate investments in tropical forest restoration. By demonstrating that the economic benefits can outweigh implementation costs, this study offers a strong rationale for corporations to consider tropical forest restoration as an integral part of their business and sustainability strategies. Additionally, it identifies key factors influencing the economic returns of such investments, aiding corporations in optimizing the positive impacts of their initiatives.
1,000 HP Rig for Indonesia Geothermal Drilling
Authors: Hartono Yudi , Chandra Roni , Sae Simangunsong Sahat , Monikha Wulandari Abilati , Tiffany Mandagi Charlotte , Bhawika Putra Redha , Wisnuwardhana Reksalegora Sentanu , Ashadi  , Arianto Subur 
Published: February 2025

Abstract
Rig rental and service cost accounts for 40-45% of the drilling cost – the largest drilling cost component. Choosing the right rig size will potentially reduce well costs – enhancing a geothermal project’s overall economic value. Despite rig manufacturers providing maximum rated drilling depth capabilities, drilling team often opt for larger than necessary rig sizes based on past experiences. Statistical data for geothermal drilling in Indonesia with depths between 1,200-3,280 mMD indicates common usage of 1,500-2,000 HP rigs, which was found to be excessive. The study in this paper shows that a 1,000 HP rig is sufficient to drill a geothermal well in Indonesia down to 3,300 mMD. This will potentially enable significant drilling cost savings of around USD 25,000/day.