bluuebunny/crossref_metadata_2025_split huggingface dataset:
Design of IoT-based portable digital wind speed and wind direction measuring tools
Authors: Soehartanto T , Setiantoro R Y 
Published: December 2023

Abstract
A wind speed meter currently can only read wind speed without knowing the type of wind, so a feature that can read the type of wind will be embedded, and a wind vane sensor will be added to detect wind direction. In this research, a wind speed measuring instrument was made using an anemometer cup mounted with an optocoupler sensor to convert rotary motion into wind speed, and wind direction using a wind vane mounted with a hall effect sensor to determine the wind’s direction. The test results of the wind vane sensor were correction of 0, 100% accuracy, measurement range of 0° – 315°, span of 315°, resolution of 45°, and sensitivity of 0.14. The anemometer sensor readings have an average error of 2.007%, an accuracy of 97.93%, a range of 0 – 40.72 m/s, a span of 40.72, a resolution of 0.01 m/s, and a sensitivity of 0.00024. On May 3 2023 at 13.35 – 14.00 WIB, database testing results were obtained in the form of sensor reading data. The data sending tests that have been carried out have resulted in real-time data sending with a sending speed of <1 second, and the GUI can display menus and data from sensors.
Synthesis of ZnO nanoparticle from Electric Arc Furnace (EAF) dust prepared by hydrothermal method via hydroxide precipitation
Authors: Nulhakim L , Zuryawan F , Rozana M , Astuti W 
Published: December 2023

Abstract
Electric Arc Furnace (EAF) dust is a type of metallurgical solid waste that is produced as a by-product of steel manufacturing and contains important metals such as zinc (Zn). Processing Zn from EAF dust into metal oxides such as zinc oxide (ZnO) is critical for a variety of applications. The hydrothermal technique of extracting Zn from EAF dust uses hydrochloric acid (HCl) as a leaching agent and sodium oxide (NaOH) as a precipitating reagent. In this study, the process begins with leaching using HCl 3 M at a temperature of 80 °C for 5 hours. The product is then filtered to separate the Zn and other components in the EAF dust. The method is then continuing for precipitation using NaOH 10% as a precipitating agent. Then, initiating the hydrothermal process with time variations of 1, 3, and 6 hours and temperatures of 120 °C, 150 °C, and 200 °C. The UV-Vis characterization result showed that the absorbance value was around 365 nm, which is typical of ZnO. The XRF analysis demonstrated an increase in the presence of ZnO compound. The XRD results showed that as the hydrothermal temperature and duration increased, so did the crystallinity in ZnO. The results shown that ZnO nanoparticles can be prepared from EAF dust as a raw material using the hydrothermal technique via hydroxide precipitation.
Synchronization and chaos control in coupled Non-identical systems: application in Wind Turbine-Grid coupled power systems
Authors: Ebobenow J , Itarngoh N P , Daoudi M , Arreyndip N A 
Published: December 2023

Abstract
The increasing number of renewable energy systems coupled to the grid can lead to electrical energy losses when the currents or voltages of the two systems are not synchronized. Many mathematical models have investigated the phenomenon of synchronization in coupled systems. Here, we mathematically model the dynamics of a wind turbine-grid coupled system as a periodically driven Duﬃng resonator coupled to a Van der Pol oscillator with both position and velocity coupling. We consider the fluctuating nature of the wind as the only external driving force. We integrate the coupled system of equations under different coupling strengths and driven frequencies using the Runge-Kutta method of order 4(RK4). The result suggests that synchronization can be achieved at higher coupling strengths even with small values of the driven frequencies than at lower coupling strengths. At higher values of the driven frequency, the system exhibits chaotic behavior for both strong and weak couplings but with synchronization maintained only for the strong coupling case. Our results suggest chaos and synchronization can be controlled in this system by turning appropriate parameters.
Measurement-based Auralisation to Predict Room Acoustics Quality of a Large Mosque with a Pyramid-Shaped Ceiling in Bandar Lampung
Authors: Ikhwanuddin R , Sherly AF , Sari EP , Drantantiyas NGD 
Published: December 2023

Abstract
Acoustic standards in mosques are available, but most people have a lack of understanding of these measures. Auralisation is an audio technology that uses impulse responses, dry sounds and convolution software to create authentic auditory experiences. In Indonesia, objective room acoustic parameters are still unknown and the potential of auralisation is underexplored. The study aims to predict acoustic quality and people’s preference for auralisation in a pyramid-shaped ceiling using field measurements and subjective ratings. The methodology includes pre-survey, RIR measurement, dry sound recording, auralisation, and subjective surveys. Background noise, T30, D50, and C80 were measured, while auralised samples of lectures and Quran recitations were evaluated. Respondents’ preferences generally correlated with T30, especially D50 (47%) for lectures and C80 (44%) for Quran recitations. In conclusion, the study demonstrates the interplay between subjective preferences and objective measurements and suggests that these parameters can predict acoustic quality in pyramid-shaped dome mosques, paving the way for better design practices and improved listening experiences.
Investigation on the effect of ZnO/PbO exchange on Physical and Optical Properties of Tellurite Sodium Bismuth Zinc doped Lead Oxide Glasses
Authors: Sutomo A D , Marzuki A , Harjana  , Purwanto H , Ramelan A H , Fausta D E , Wibowo K M , Astuti R W , Rahmawati A N , Alvyanti F A , Oktafiani R 
Published: December 2023

Abstract
New tellurite glasses having compositions: 60TeO2-(35-x)ZnO-3Bi2O3-2Na2O-x PbO and 55TeO2-(41-x)ZnO-2Bi2O3-2Na2O-x PbO where x = 0 and 0.5 mol% were fabricated and characterised in order to study the effect of substitution of PbO by ZnO. Density measurement was carried out by applying Archimides principle, that is by using pycnometer. Refractive index measurement was carried out by applying Brewster angle method, at which the intensity change in transversed magnetic light (λ = 632.5 nm) was recorded. From the experiment it can be shown that the glass density increses with the increse of PbO concentration, for the first glasses it change from 5.71 to 5.74 gr/cm3 while for the later it change from 5.85 to 5.87 cm3. Their molar volumes, however, behave inversely. Refractive index change due to this compostional change behave in same manner as density, refractive index increses with the increase of PbO content. Refractive indexes of the first pair are 1.89 and 1.93, respectively, while the later are 1.88 and 1.95, rspetively. Based on these findings, each pairs is a potential candidate for fabricating fiber optic at which the lower index is for cladding material while the higher index for core material.
Influence of B2O3/ZnO Exchange in Gamma Shielding Properties of TBTZ Glasses
Authors: Purwanto H , Marzuki A , Sutomo A D , Harjana  , Ramelan A H , Fausta D E , Astuti R W , Rahmawati A N , Alvyanti F A , Oktafiani R 
Published: December 2023

Abstract
A series of tellurite glass having compositions: 60 TeO2 – (30-x) B2O3 – 7 TiO2 – (3+x) ZnO where x = 0, 1, 2, 3, 4, and 5 mol% were successfully facbricated, i.e., by applying the melt-quenching method. Melting was carried out at 950˚C in 70 minutes. The density of all the investigated glasses were calculated using an empirical equation. The density of TBTZ increases from 4.005 to 4.197 g/cm3 with rising ZnO concentration. It can be understood that density enhancement is due to an improvement in glass molecular weight. Whereas, gamma shielding properties of the glasses was simulated using Phy-X/PSD software for photon energy in the range 0.005 – 15 MeV. Linear attenuation coefficient (LAC) and half-value layer (HVL) are obtained and discussed. It was shown that LAC increase and HVL decrease within all gamma photon energies within alteration of ZnO concentration. The increase and decreation vary and depend on gamma photon energy. Identify relevant articles in literature searches, great care should be taken in constructing both. (boro-tellurite glass, linear attenuation coefficients, Half Value Layer, Gamma Shielding, radiation shielding)
Assessments of Mean Reflectance Surface Exitance and Contrast in a Museum: Comparison Between Simulation, Calculation and Field Measurements
Authors: Nurhuda T , Monty A Z , Apriani S , Mangkuto R A 
Published: December 2023

Abstract
Museums are artistic centers that attract people as tourist destinations, allowing them to appreciate art, and learn about history, culture, society, and science. The visual presentation of museum spaces is crucial in enhancing the appeal to visitors. It is closely tied to visual appearance and ambient illumination of the space, which can be represented by Mean Room Surface Exitance (MRSE). The objectives of this research are to determine the lighting specifications in exhibition spaces by considering lighting metrics, including MRSE and contrast, and to compare the MRSE values obtained from the calculation, simulation, and measurements from field experiments. The findings of this research indicate that the type of luminaire that can be used is a spotlight with a TAIR (Target-to-Ambient Illuminance Ratio (TAIR) of 3:1 or higher, particularly if the object needs to appear brighter than its surroundings. The error between the experimental and simulated results with the DIALux evo simulation tool was relatively low at 1.4%. However, the error between the experimental results and the calculated results was relatively high, at 25.25%, which is caused by the TAIR factor. The lowest contrast error was obtained for the displayed statue, with a 4% error in the calculation method and 0% error in the simulation method. The highest contrast error was obtained for the wall, with a 66% error in the simulation method due to differences in the room size of the simulation model and the actual space.
Modeling and Optimizing Cellulose Extraction from Rice Straw using HCl
Authors: Krisnayana R , Biyanto T R , Nugroho G 
Published: December 2023

Abstract
Until now, the biggest energy supply has come from fossils. The use of energy sources derived from fossils is increasingly avoided because it causes the greenhouse effect. In addition, the availability of energy from fossil sources is dwindling, even far from being sufficient for needs. This is what causes the need for renewable energy sources. Indonesia has the greatest potential for renewable energy sources, namely biomass. In Indonesia, the biomass with the largest harvested area is rice, so rice straw has the potential to be a source of renewable energy. The process of forming liquid fuel derived from rice straw requires high temperatures. We propose a process of converting rice straw into liquid fuel under mild conditions. This process requires several stages. The first step is to extract cellulose from rice straw. This process uses HCl. Variations of HCl used in this study were 1%, 3%, 5%, 6% and 9%. The temperature variations used are 80°C, 90°C, 100°C, 110°C and 120°C. From the experiments, it is known that the extracted cellulose content is higher when using higher temperatures. In addition, from the experiment, the result was that the more HCl, the less cellulose content obtained. From this experiment, a model was made, namely cellulose content = 33.001 + 0.03738 x temperature – 0.2639 x HCl content. The model is verified and validated using Hysys and compares the output from Hysys with the experimental output which produces a maximum error of 4.74%. Then to get the maximum cellulose content, optimization is carried out. The optimization methods used are graphical, genetic algorithms, and PSO. These three methods gave corresponding results, namely a maximum 37% cellulose content at 120°C using 1% HCl.
Temperature Sensor Integration into the Node-RED Platform for Transformer Monitoring
Authors: Nugraha H , Hermawan A D , Mulya M A J , Firmansyah I , Suryadi  
Published: December 2023

Abstract
Transformers must be continuously monitored to guarantee dependable and effective performance. The combination of Internet of Things (IoT) technology and sophisticated data processing systems opens up new possibilities for improved transformer monitoring in this context. To enable real-time monitoring of transformer conditions, this study focuses on the integration of IoT temperature sensors into the Node-RED platform. The suggested method gathers temperature information from several locations inside the scale laboratory transformer using IoT temperature sensors. The Node-RED platform receives the collected data and processes, analyzes, and visualizes it in real time. Comprehensive monitoring is made possible by the platform, allowing operators to quickly identify any unusual temperature swings or potential problems inside the transformer. For older transformers built with normal Kraft paper, the rated hot spot temperature is either 90°C according to IEEE or 97°C according to IEC. The Node-RED platform’s incorporation of IoT devices not only provides real-time monitoring capabilities but also offers the flexibility to implement predictive maintenance strategies. By harnessing the power of data analytics and visualization, operators can make informed decisions to optimize transformer performance, extend its lifespan, and minimize downtime. The results of this study demonstrate the effectiveness of the IoT temperature sensor integration into the Node-RED platform for laboratory transformer monitoring. Based on the measurement winding temperature at the transformer has reached 90 ˚C at full load, and then the system starts to activate the blower to cool the transformer. The approach contributes to the advancement of transformer management practices, ensuring the reliability and efficiency of critical energy infrastructure.
Preliminary study on the man-made habitat of Utricularia gibba L. in the tropical peatland environment
Authors: Lovadi I , Ifadatin S , Andarisko B 
Published: December 2023

Abstract

Utricularia gibba L. is a free-floating aquatic carnivorous plant found in some parts of the world, including Asian tropical regions. However, data on water’s physical and chemical properties for the ecology of this species in Asian tropical peatland environments are underrepresented in the literature. Here, we reported water physical and chemical properties for the habitat of U. gibba occurring in the tropical peatland of Kalimantan Barat, Indonesia. The study site is on the man-made water canal in Jalan Parit Haji Muksin II, Kubu Raya Regency, Kalimantan Barat. We measured temperature, electrical conductivity (EC), Total Dissolved Solid (TDS), pH, Dissolved Oxygen (DO), total nitrogen, total phosphorus, nitrates, and nitrite of the waters at three points along the water canal where the bladderworts occur. The results showed that U. gibba inhabits waters with low conductivity (< 66 µS cm-1), low TDS (< 32 ppm), acidic (< pH 6), low DO (< 8 mg L-1), but higher total nitrogen (7.02 – 19.4 mg L-1), total phosphorus (0.86 – 1.71 mg L-1), nitrates (3.01 – 4.06 mg L-1) and nitrite (3.53 – 5.18 mg L-1). These findings demonstrate that U. gibba in tropical peatland environments reportedly occurs in acidic (pH 5.03 – 5.29) but relatively high nutrient habitats compared to its counterpart and other species found elsewhere.
Health impact reduction strategy design due to pesticide exposure
Authors: Muslim Azhari , Dadang  , Indrasti Nastiti Siswi , Syaukat Yusman 
Published: December 2023

Abstract
This study aims to formulate priority strategies for reducing health impacts due to pesticide exposure in red onion farmers. The research was conducted in Brebes District, Wanasari District, and Jatibarang District, Brebes Regency, Central Java Province. The collected data is analyzed for prioritization based on criteria and strategies set with a hierarchical and priority model. The process of completing the Analytical Hierarchy Process method in this study was carried out with the software Expert Choice 11. The results showed that the pairwise comparison assessment on alternatives was a technological improvement with a weight of 0.475; Improved regulation with a weight of 0.329 and increased knowledge, attitude, and practice with a weight of 0.196. This shows that technology related to reducing health impacts needs to be regulated separately considering the high number of health problems due to pesticide exposure.
Comparison of social capital of different community forest managements and their impact on community participation in the Social Forestry (SF) Program in Indonesia
Authors: Situmorang R O P 
Published: December 2023

Abstract
Social Forestry (SF) Program is a sustainable forest management implemented in different management types by community forest organizations (CFOs) in Indonesia, namely collective and individual management types. This study aimed (1) to compare the social capital of different management types of the SF program; and, (2) to evaluate the relationship between social capital and community participation. The study was carried out in four CFOs in four villages in North Sumatra Province from 2019 to 2020.The data were collected from 73 respondents from the collective type and 113 respondents from the individual type. T-test was used to evaluate the social capital of the different management types, while the relationship between social capital and participation was evaluated by multiple regression analysis. This study found that the CFOs that implement a collective management possess a better social capital compared to an individual management. The collective management has more intensive meetings that can increase social interactions. The collective management also possess the wider networks and the more varied community activities that improve the social capital of the CFOs. The community features such as the more homogenous communities and the smaller size of the collective type communities may cause the stronger social capital of SF groups. Furthermore, social capital significantly influences community participation in the SF program. For the collective type, social interaction, trust, reciprocity, and leadership are the determinant factors that can improve community participation. In contrast, for the collective type, they are only social interaction, trust, and reciprocity.
Strategies for improving community participation in Mangrove Ecosystem Conservation in Teluk Kupang Coastal Areas (A case study of Nunkurus and Oeteta Villages)
Authors: Koda Sari Hauliah Ahmad 
Published: December 2023

Abstract
The purpose of this research is to investigate the factors that influence the level of participation of coastal communities in the preservation of the mangrove ecosystem and to develop strategies to increase their involvement. Qualitative descriptive analysis was conducted using observation and direct observation of community behavior in the field to determine community participation and the factors affecting it. The SWOT method was also used to identify appropriate strategies for increasing community participation. The research found that income, education, and length of residence in the coastal area were the factors that influenced community participation. The level of participation varied between the two locations, with Nunkurus village exhibiting passive participation and Oeteta village showing self-mobilization participation. Based on the SWOT analysis, various strategies were identified to enhance community participation in Teluk Kupang, including increasing awareness and education on the importance of the mangrove ecosystem, providing economic incentives for community members to engage in sustainable activities, establishing a community-based management system for the mangrove forest, encouraging participation in regular monitoring and evaluation of the mangrove ecosystem, and forming partnerships between government agencies, NGOs, and local communities. By adopting these strategies, the participation of the coastal community in preserving the mangrove ecosystem can be improved and the conservation efforts will become more effective.
Design of sustainable electronic waste management business process transformation towards circular economy transition in Jakarta, Indonesia
Authors: Soesanto H , Maarif M S , Anwar S , Yurianto Y 
Published: December 2023

Abstract
E-waste or electronic waste management in developing countries still needs to catch up with developed countries. One of the challenges of electronic waste management in developing countries is its sustainability. Electronic waste management’s sustainability is essential for developing countries’ regional development. One of the promising concepts for developing sustainability for e-waste is the circular economy (CE). However, this requires mapping of e-waste management business processes. There needs to be more research on the business processes of e-waste management in developing countries toward CE transition, for example, Indonesia. Therefore, this research aims to design a business process transformation for sustainable e-waste management in Jakarta, Indonesia. We conducted this research using Business Process Modeling and Notation (BPMN). Our results give a new proposed business process for e-waste management. The new e-waste management business process is expected to improve efficiency and quality. This study will help policymakers and professionals to implement a better e-waste management system, especially in developing countries.
Spatio-temporal analysis of river water pollution levels in the Angke-Pesanggrahan watershed
Authors: Prayoga G , Zainalarifin J , Mufawwaz TA , Firmansyah FS , Rizal H , Mursalin  , Effendi H , Liyantono  , Panggabean GT , Supalal YA , Rahmawati  , Samputra NRAR 
Published: December 2023

AbstractRiver water is an important part of people’s lives, both in quantity and quality. Various utilizations will influence the decline in water quality, especially from household, industrial, and solid waste or garbage disposal. One of the watersheds affected by this anthropogenic influence is the Angke-Pesanggrahan watershed in Jakarta Province. The study was conducted at 31 observation points of several rivers, such as the Angke, Sekertaris, Sepak, Mookervart, Grogol, Cengkareng, Kamal, and Pesanggrahan Rivers. This study aims to analyze the water pollution level spatio-temporal for eight periods in 2021-2022. The dynamics of the pollution level are analyzed by the Pollution Index (PI) using water physical-chemical-biological parameters. The pollution level in each river was then mapped using ArcGIS software. The pollution level of this watershed was light to heavily polluted (PI value of 4.13-19.34). The status of river water quality in almost all rivers is likely to be worse in 2022 than in 2021. High pollution levels are generally found in almost all rivers, especially the Sekertaris and Sepak Rivers. Pesanggrahan River has a better status, with an average PI of 8.06 (moderately polluted). Parameters often do not meet quality standards: color, TSS, ammonia, free chlorine, H2S, BOD, COD, DO, nitrite, MBAS, fecal coliform, and total coliform. Pollution in the watershed needs to be resolved by involving local stakeholders, implementing communal WWTP, applying for stricter wastewater discharge permits, and continuously educating and empowering the community on sustainable river management.