bluuebunny/crossref_metadata_2025 huggingface dataset:
Evaluation of water consumption at district scale by analyzing smart water meter data
Authors: Obaid S , Hosoi K , Ngoc N M , Inoue T , Yokota K
Published: December 2024

In urbanization, understanding of water consumption is necessary for water supply infrastructure development. We have been studying water consumption at Iride-Chibata District in the development of water supply management in Kosai City, Shizuoka Prefecture, Japan. Here the water consumption has been managed by reading water meter at each household every two months. Meanwhile, with the provision of smart metering for electricity, the district has installed the smart meters, which can hourly monitor water consumption, at all of 1,871 households. This study analysed the smart water meter data of all households to evaluate the water consumption at district scale. The average daily water consumption per household was higher on weekends than on weekdays. The hourly consumption showed two peaks at the hours of 7:00 – 11:00, and 18:00 – 22:00, respectively corresponding to morning and evening activities in a household. Either morning or evening, the peaks of weekdays occurred one hour earlier than those of weekends. The evening peaks were higher than the morning ones, that might come from Japanese evening bathing culture. These findings may help for timeframe water supply planning.
Sustainable resilient communities: Strengthening tourism village institutions in disaster prone villages, central Bengkulu Regency, Bengkulu Province, Indonesia.
Authors: Darmi T , Mujtahid I M
Published: December 2024

This study aims to identify the institutional capacity of tourist villages in terms of preparedness, safety, and sustainable community resilience to manage tourist villages in disaster-prone areas. This study develops a theoretical framework based on institutional and socio-ecological resilience. Using qualitative research methods, the object of the study was the Rindu Hati tourist village, Central Bengkulu Regency, Bengkulu Province, Indonesia, which was identified as a disaster-prone village but is included in the top 10 tourist villages in Bengkulu Province. Data collection techniques included participant observation, in-depth interviews, and document studies. The results of the study confirmed that the Rindu Hati village has a natural landscape, socio-culture, and tourist attractions that are potential tourist villages worthy of development. Community resilience requires assistance from the local government, academic support, and the private sector. Strengthening the institutional capacity of tourist villages so that community resilience in dealing with natural disasters becomes important. The implications of the study emphasize that the development of sustainable disaster-prone tourist villages requires adaptive community resilience to all changes, but this process takes time and strong and well-organized institutions.
Regional development sustainability based on the typology of ecological and built environments: A case study of the Surakarta-Karanganyar-Magetan tourism corridor
Authors: Rini E F
Published: December 2024

Regions share common characteristics and have the ability to influence each other. Surakarta, Karanganyar, and Magetan City, possess tourist attractions that are interconnected and have a mutual influence. The rapid growth and changes in land use along the border of Karanganyar and Magetan especially, align with the development of these tourist attractions, making it essential to study the sustainability of this regional development. Tourism in natural landscapes is influenced by both built capital, such as infrastructure, and natural capital, such as mountains or protected areas. This study aims to assess the sustainability of regional development by analyzing the ecological and built environment typology. The research will identify the spatial typology of tourist attractions in the study area and utilize satellite imagery data to examine the characteristics of tourism corridors. Kernel density analysis used to identify the built environment density over the ecological environment and tourist attractions. The results of the study indicate that tourist attractions and the built environment that supports them have the potential to threaten the sustainability of regional development because they are located in protected forest areas. The findings of this typology will contribute to the sustainable development of tourism in the Surakarta-Karanganyar-Magetan corridor, focusing on the interventions that need to be carried out by relevant stakeholders.
Study of community participation in community-based clean water distribution movement in Semarang City
Authors: Nugroho W D , Samadikun B P , Putera I B P A S , Azzaimi M T F , Purba Y R S
Published: December 2024

This study evaluates the involvement of residents in the community-driven clean water distribution initiative in RW 07 Srondol Wetan Urban Village, Banyumanik Sub-district, Semarang City. The study aims to determine the level of resident participation in the clean water distribution program, evaluate the program’s effectiveness, and identify factors influencing community engagement. The research methodology encompasses questionnaire surveys, in-depth interviews, and participatory observation. The results show that community participation in the program has not been very high, due to the creation of the new PAMSIMAS program in 2022. The program is considered effective in improving access to clean water and the quality of life in the community. Factors influencing participation include awareness of the importance of clean water, strong local leadership, and support from government and non-government organizations. This research concludes that resident participation is pivotal for the success of community-based clean water delivery programs and recommends bolstering community capacity and fostering ongoing collaboration among various stakeholders.
Rapid mapping of land cover changes in tropical watershed in Indonesia using Google Earth Engine
Authors: Fariz Trida Ridho , Suhardono Sapta , Fadhilla Suri
Published: December 2024

Besitang watershed is one of the tropical watersheds in Indonesia. In the upstream area, Besitang watershed is part of the Gunung Leuser National Park, a conservation forest abundant with diverse wildlife, including primates and terrestrial mammals. Studying land cover changes in Besitang watershed is crucial. A challenge in studying land cover changes in tropical watersheds is cloud cover, thus necessitating land cover mapping studies in Besitang watershed using Google Earth Engine (GEE). GEE is a platform for processing geo-big data, providing extensive and cloud-free satellite image data. Therefore, this study aims to map land cover in Besitang watershed using machine learning-based classification on GEE. The land cover mapping process in Besitang watershed utilizes Landsat 8 satellite imagery. The input data includes bands 1 to 7 of Landsat 8 imagery and image transformations such as NDVI, NDWI, NDBI, BSI, EVI, NDTI, SATVI. The years selected for analysis are 2001 and 2021, with machine learning techniques tested including CART and Random Forest (RF). The results of this study indicate that RF is the best machine learning method for mapping land cover in Besitang watershed, using an image combination consisting of Band 2, Band 3, Band 4, Band 5, Band 6, Band, NDVI, NDWI, NDBI, BSI. The mapping results show a forest area change of approximately 352326.29 hectares, with the majority of changes to plantation.
Grassroots innovation in waste management: Transforming Bendhung Lepen into a sustainable tourism
Authors: Fajri H , Saputra B , Halawa H S , Pegi A L , Renaldi I , Wahyuni N
Published: December 2024

Bendhung Lepen, once a rundown irrigation canal and neglected village park, has become a clean and attractive tourist destination thanks to youth awareness of environmental cleanliness. This research aims to reveal how local innovation can improve the effectiveness of waste management and contribute to a sustainable environment. The research method used is qualitative, with a case study approach involving in-depth interviews, participatory observation, and document analysis to collect data. Data analysis was conducted using MAXQDA to process coding abstractions from interview transcripts. The results of this study show that Local innovation carried out by the Bendhung Lepen community succeeded in transforming the slum area into a clean and attractive tourist destination. In addition, the active participation of youth in waste management plays a vital role in the success of this transformation.
The role of waste management policy on the efficiency of concrete material waste in dam projects
Authors: Hermawan F , Yuliastuti I , Sumiyati S , Saptodewo A
Published: December 2024

Concreting in construction often generates significant waste, but effective waste management can mitigate this. This study examines the impact of management policies on waste efficiency in the concrete pouring work of the Logung Dam project in Kudus. Using both quantitative and qualitative methods, the research analysis empirical data to understand observed phenomena. The quantitative analysis employs a statistical compare-mean test to assess concrete work efficiency, while qualitative analysis involves interviews with project stakeholders about waste management policies. Findings show that inadequate waste control and management systems lead to resource and budget wastage. In response, a new policy was implemented to improve concrete waste management. This policy includes procedures for managing leftover materials, work instructions for controlling the volume and weight of ready-mix concrete delivery and receipt, and detailed oversight of concreting work. Implementation led to positive changes, such as organizational structure modifications, a transparent and controlled ordering system, and Joint Inspections (JI). Following the policy implementation, waste management efficiency improved significantly, with the waste inefficiency level decreasing from 0.527% to -0.225%, reflecting a 0.752% efficiency increase. Although the correlation between policy changes and waste volume efficiency was positive, it was relatively weak.
Willingness to Pay Analysis for The Conservation of Edupark Mangrove
Authors: Agustin Dilla , Suliantoro Hery
Published: December 2024

The increase in the number of visitors to Edupark Mangrove Camar has caused environmental degradation and damage to the mangrove ecosystem. Efforts to develop management and conservation strategies at Edupark Mangrove Camar need to be implemented. An important aspect of implementing these strategies is the participation of visitors as users of public goods to provide economic value for the use of mangrove forest tourism services. Willingness to Pay (WTP) is an approach to measure the economic value that visitors are willing to pay for development efforts at Edupark Mangrove Camar. The contingent valuation method (CVM), using the double bounded dichotomous choice (DBDC) bidding technique, is used to determine the amount of visitors’ bid value. The non-parametric estimation models Kaplan-Meier-Turnbull (KMT) and Spearman-Karber (SK) are used to estimate the average WTP value of visitors. To determine the factors influencing visitors’ WTP, binary logistic regression analysis is used. Based on WTPKMT and WTPSK, the average WTP values are obtained at Rp. 21,529 and Rp. 25,820, respectively. Based on the binary logistic regression analysis, it is found that the variables gender (female), high local ecological knowledge, and high awareness have a significant influence on WTP.
Initiation Of PT Pupuk Iskandar Muda To Carry Out Sustainable Development Through Sustainable, Peaceful, And Empowered Paya Nie
Authors: Nugraheni I F , Aka H A , Azhar A , Ismi N , Milna  , Zufina R , Makmur S , Jufri  , Alfriyanto M B , Choirunnisa M I , Purnama F
Published: December 2024

Paya Nie Swamp currently faces a decrease in peatland area from 306 hectares in 2013 to 262 hectares in 2023. This occurred due to community activities that converted it into oil palm and rice fields. Whereas, peatlands hold carbon stocks three times higher than forests, and have major environmental values as water reservoirs. In Paya Nie, there are several illegal activities of the community taking endemic fish, namely snakehead fish using electric shocks, and lack of public awareness of local wisdom to weave purun and protect peatlands. Based on these problems, PT Pupuk Iskandar Muda took the initiative to develop the Paya Nie Lestari, Damai, and Berdaya programs in Blang Me Village, Bireuen Regency. The program is a concrete contribution to the company’s empowerment of the community and conservation of peatlands. The initiation of Paya Nie Lestari, Peaceful, and Empowered is in line with the goals of sustainable development, where the program’s implementation supports the fulfillment of the 10 SDGs. The three sub-programs in it have an integrated goal, which is to conserve peatlands by growing economic value, and implementing green lifestyle ecosystems to support sustainable development.
Analysis of Heavy Metal Content of Mn, Cu, Fe, Zn, Pb in Agricultural Irrigation Water and Soil After Tin Mining
Authors: Budianto T H , Syafrudin  , Hartoko A
Published: December 2024

The content of heavy metals Mn, Cu, Fe, Zn, and Pb in agricultural irrigation water and precast tin mining soil revealed that heavy metal concentration levels had exceeded the safe limit according to health standards. The concentration of these heavy metal coils affects plant growth and the quality of agricultural products. Analysis methods used include atomic absorption spectrophotometer and flame emission spectrometry. Data collection from various literature sources that discussed the content of heavy metals in the former tin mine area. The study revealed Mn, Cu, Fe, and Zn in water and agricultural rice field soil according to the quality standard, and the Pb level in irrigated water and soil was quite high, more than 0.1 mg/L, exceeding the limit set by the quality standard. High heavy metal concentrations in post-tin mining areas can endanger human health and the environment. Comprehensive recovery efforts are needed to reduce the content of heavy metals in post-tin mining farmland so that water and soil quality can be improved.
DNA barcoding of Pelawan Kepuh (Tristaniopsis obovata Benn) utilizing the rbcL Gene
Authors: Saputri R , Arsyadi A
Published: December 2024

This research proposed the first DNA barcoding of Tristaniopsis obovata Benn. collected from Bangka Belitung through the analysis of the rbcL gene. The DNA sequences have been submitted to the GenBank, establishing a primary reference for Pelawan Kepuh (Tristaniopsis obovata Benn) from Bangka Island, based on rbcL region. Sample collection was carried out in Pelawan Forest, within the Biodiversity Park in Namang, Bangka Tengah Regency. The DNA extraction, PCR amplification, and DNA sequencing were performed as molecular analysis. Total 483 bp sequence length were obtained and has a 99.4% similarity with Tristaniopsis sp. according to BLASTN analysis. Furthermore, evolutionary history analysis exhibited that Pelawan Kepuh, is grouped with other species within the Tristaniopsis genus. The rbcL barcode analysis highlights its less effectiveness in species identification within the Tristaniopsis genus at both genetic and broader taxonomic levels. Further studies were essential to identify Tristaniopsis obovata Benn using other DNA barcoding regions, including ITS for a comprehensive identification of Pelawan Kepuh.
Geological study of granite rocks in Badau Village and Air Mesu Timur Village, Bangka Belitung Islands Province
Authors: Franto  , Mardiah  , Pitulima J
Published: December 2024

The large number of granite mining locations in the Bangka Belitung Islands Province is to meet the needs of building materials to support the construction of facilities. The study was conducted to examine the physical properties of rocks that have been mined and to see the factors that influence both endogenously and exogenously. The methods in this study are geological mapping carried out using mapping methods and sounding methods, geophysical measurements using multichannel S-Fields geoelectric tools, rock sampling, and report preparation. Based on the results of thin sections and megascopic observations, the granite rocks in Badau Village that will be mined have undergone an intensive weathering process with a percentage of 25%, the landform has been eroded from the low surface at a contour of 75 meters above sea level - 200 meters above sea level with a continuous direction from south to north. Meanwhile, granite rocks in Air Mesu Timur Village are classified as granite with moderate resistance or are in a condition of almost experiencing moderate to intensive weathering which dominates along the measurement path interpreted from the granite resistivity cross-section below the ground surface and are classified as strong granite resistance (fresh condition) located above the surface.
Designing information system for sea transportation website in South Bangka Regency to support smart city
Authors: Arkan F , Putra G B , Atmaja E J J
Published: December 2024

South Bangka is city that located in Province of Bangka Belitung Islands which using ship for support transportation because have a lot of island. The various ship is using because South Bangka have a lot of islands from small until a big island. South Bangka is experiencing difficulties in managing existing sea transportation due to the large number of ships operating without being recorded by the South Bangka transportation service. Therefore, an information system is needed that is able to manage data and information related to sea transportation in South Bangka. This ship transportation system is using the programming PhP and MySQL for the ship database used. This information system is designed to support smart city features for South Bangka Regency, because the management of sea transportation for the islands of South Bangka is centralized, digital also electronic. This information system also accessed easily by the public using smartphones and the internet to give easiness for information about ship transportation.
Memorable experiential reality tech as an environmentally friendly technology: reducing energy consumption from consumer perspectives
Authors: Christianingrum  , Hurriyati R , Wibowo L A , Hendrayati H , Gunawan A I , Afifah N , Rosalina E
Published: December 2024

The marketing paradigm shift towards 6.0 encourages industry players to focus more on green retail technology. Memorable Experiential Reality Technology (MERT) is receiving great attention for its ability to bring users into a virtual environment. MERT includes mixed reality (MR) which consists of virtual reality (VR) and augmented reality (AR). Using this technology is considered to reduce energy consumption from the consumer side, because with technology consumers can experience the experience directly without having to visit the retail industry or shopping centers that apply MERT. This study aims to determine the impact of technology on saving energy consumption from the consumer side and identify barriers to its application. Literature studies, case studies and consumer surveys were used to obtain data information in the field. The research findings are that experiential reality can significantly reduce energy consumption by offering experiences that encourage sustainable behavior among consumers. Through interactive simulations and virtual environments, consumers gain a deeper understanding of their energy savings and make informed decisions to minimize energy wastage. Barriers to technology adoption are limited infrastructure, high costs and lack of user awareness of the benefits of MERT in reducing energy consumption. Users need to be convinced that the investment of time and resources in using MERT will have a positive impact on the environment and overall energy consumption. Education and socialization on the positive effects of technology implementation are needed to help increase community adoption.
Utilization of fly ash and bottom ash (faba) and oil palm empty fruit bunch on the characteristics of red bricks
Authors: Putri F D , Sandy B D A
Published: December 2024

Fly Ash and Bottom Ash (FABA) is waste from coal combustion originating from Steam Power Plants. This waste has chemical content in the form of silica, aluminum oxide, and lime. Previous research stated that Oil Palm Empty Fruit Bunch can increase the mechanical strength of the building material and prevent the propagation of cracks due to loads. The use of additional ingredients FABA and Oil Palm Empty Fruit Bunch in the red brick mixture aims to determine the characteristics of red brick in the form of compressive strength and water absorption values. The test was carried out at the Civil Engineering Laboratory at Bangka Belitung University using 100 red brick samples. The percentage of FABA used in this research is 10% (5% fly ash and 5% bottom ash) calculated from the weight of the clay, while the percentage of Oil Palm Empty Fruit Bunch used is 0%, 5%, 10%, and 15% is calculated from the weight of the clay. The results of this test show that red bricks with the addition of 10% (5% fly ash and 5% bottom ash) FABA and 0% Oil Palm Empty Fruit Bunch increased the compressive strength value of normal red bricks and can reduce water absorption.
Study of the Connection Between Yogyakarta – Sleman Groundwater Basin and Pajangan Hill (as a Non-Groundwater Basin Area) Using Groundwater Geochemistry and Isotope
Authors: Hadameon Y , Hendrayana H , Dirgantoro M F
Published: December 2024

This study investigates the hydrological connectivity between the Yogyakarta-Sleman Groundwater Basin (GWB) and the non-groundwater basin (non-GWB) area of Pajangan Hill using geochemical and isotopic methods. A total of 28 groundwater samples were analyzed for major ion content and isotopic composition, sampled from shallow wells, deep wells, and springs. Ion chromatography and cavity ring-down spectrometry were employed for analysis. The findings reveal that groundwater in Pajangan Hill predominantly consists of calcium bicarbonate, while Yogyakarta-Sleman GWB includes calcium bicarbonate, calcium nitrate, and sodium bicarbonate. Isotopic analysis indicates that water samples close to the Local Meteoric Water Line (LMWL) likely originate from local rainwater infiltration, maintaining their original isotopic composition. Despite some geochemical similarities, based on classification and composition analysis, significant differences in major ion concentration values suggest no hydrogeological connection between the two regions. The distinct lithologies, limestone in Pajangan Hill, and young volcanic deposits of Merapi in Yogyakarta-Sleman GWB further support this conclusion, indicating no hydrological connectivity between these areas.
Exploring environmental vulnerabilities of small islands through a bibliometric analysis: threats and adaptation strategies
Authors: Henri H , Retnaningdyah C , Rahardi B , Hakim L
Published: December 2024

The article delves into the environmental vulnerability of small islands through a bibliometric analysis, focusing on the threats they face and their adaptation strategies. The study utilizes data from academic journals published between 2014 and 2023 to discern research trends, key topics, and prominent authors in this field. The analysis revealed that small islands are primarily threatened by climate change, rising sea levels, and natural disasters. Furthermore, it highlighted an increasing emphasis on community-based adaptation strategies, mitigation policies, and green technologies as responses to these challenges. The study also identified research gaps in specific case studies and practical, on-the-ground solutions. Its conclusions underscore the importance of interdisciplinary and collaborative approaches to address small islands’ environmental vulnerability and the necessity of robust policy support to underpin effective adaptation and mitigation efforts. This article contributes to the literature by providing a comprehensive overview of the current state of research and offering recommendations for future research directions.
Identification of volatile compounds in kelulut honey (trigona sp.) from the nectar of pelawan trees in the pelawan forest, central Bangka regency, Indonesia
Authors: Evahelda  , Kusmiadi R , Helmi H , Sumarwan A
Published: December 2024

Kelulut honey, produced by stingless bee (Trigona sp), is extensively cultivated in the Bangka Belitung Islands due to its ease of cultivation. This honey typically exhibits a slightly sour flavor whereas honey derived from the nectar of pelawan tree is noted for its slightly bitter flavor. One of the components that can significantly influence the nutritional properties of honey is the presence of volatile active compounds. This study aimed to identify the active volatile compounds in kelulut honey derived from pelawan tree nectar collected in the Pelawan Forest, Central Bangka Regency. The identification of these compounds was performed using gas chromatography mass spectrophotometry (GC-MS). The findings revealed that the dominant volatile compound in kelulut honey belong to alcohol group appeared at a retention time of 15.74 minutes and real area 43.73, compound is suspected to be 2-Furanmethanol, 5-ethenyltetrahydro-a, a, 5-trimethyl-, cis-.
Design model augmented reality of digital tourism education for reduce paper use
Authors: Juniawan F P , Hendrik M , Putra Y Y , Sylfania D Y
Published: December 2024

Tourism learning as a form of education currently still uses conventional methods, such as using books as learning media. This method has an impact on the large number of papers needs to print into the books so that all students have them and learning by the book. The usage of this papers, that we know comes from trees, can be reduced, by using Augmented Reality (AR) Technology. In addition, with AR we can include learning materials according to the curriculum into the AR application. This paper proposed the design model of AR prototype that can be used as a learning medium with tourism objects. The use of the proposed AR model aimed to enhancing user education in tourism education, learning literacy, numeracy, and psycholiteracy, while promoting environmental sustainability by reducing paper usage. The proposed model has several steps, such as developing the AR Eduwisata application, disseminating the app for the user, namely elementary school students, so becomes a learning stimulus for students and produces learning responses, and has an impact on student habits in each of their learning activities. We also proposed a software development model namely prototyping model. Future research will focus on implementing AR, expanding the 3D object tourism, and performing evaluations to various users in elementary schools in Bangka Belitung.
Controlling factors decreased of granite rock masses quality on Bangka island
Authors: Irvani  , Soemintadiredja P , Sadisun I A
Published: December 2024

The Granite rock covered almost one-fifth of the land on Bangka Island. The construction of settlements and various infrastructures on granite formations has increased. This research intended to analyze the parameters controlling the granite quality (S-type and I-type), which are widespread on Bangka Island. The Rock Mass Rating (RMR) and Geological Strength Index (GSI) methods measure the rock quality and their controlling factors. As a result, granite has RMR and GSI variation quality from fair to very good. Granite at the coastline tends to be of lower quality than those further from the coastline. Geological structure and weathering are the main factors causing a decreasing rock mass quality. The sea water entering the rock fractures is thought to have accelerated the weathering along the coastline.
Identification of groundwater flow on ex-mining area using the self potential method as an initial stage of post-mining site reclamation at Red Hill, Bangka
Authors: Kusmita T , Ambarwati J , Indriawati A , Triani
Published: December 2024

The Red Hill area in Bangka Regency, one of the largest former mining sites on Bangka Island, remains largely unreclaimed, presenting opportunities for sustainable rehabilitation. This study utilizes the Self-Potential (SP) method to map groundwater flow patterns as a foundation for post-mining reclamation efforts. SP data were collected along eight survey lines, covering 150-250 meters each, in the Ampar Lake area. The analysis reveals SP anomalies ranging from -117 mV to 86,696 mV, indicating significant variations in electric potential linked to groundwater movement. High-potential zones were identified as recharge areas, while low-potential zones indicate discharge areas, suggesting a regional groundwater flow from northeast to southwest. These findings establish a preliminary understanding of groundwater behavior in the Red Hill area, providing a basis for targeted reclamation to support agricultural, educational, and ecotourism initiatives.
Extraction of silica from Bangka quartz sand using the alkaline digestion method
Authors: Aldila H , Andini D E
Published: December 2024

Bangka quartz sand is a strategic mineral that contains relatively high levels of silicon compared to other sources of silicon minerals. The silicon content in a mineral greatly determines the feasibility of processing its derivative products, one of which is very well known, namely silica. Silica is a functional material that is widely applied in various fields including energy, environment, food and medicine. In this research, the silica extraction process has been carried out from Bangka quartz sand using the alkaline digestion method. The main extraction process stages include preparation, digestion using NaOH, water leaching, and calcination. The effect of varying calcination temperatures: 600, 800, and 1000°C on the silica phase and content of Si element was studied comprehensively. Based on the research results, it shows that at a temperature of 600°C, amorphous silica is formed, while at temperatures of 800 and 1000°C, crystalline silica with a quartz phase is formed with the element content of Si at 800°C reaching 98.87%.
Sexual dimorphism based on geometric morphometric and body shape for domestication broodstock of osteochilus spilurus (cyprinidae: labeoninae) from Belitung island, Indonesia
Authors: Kurniawan A , Risdayanto J , Syarif A F , Fabiani V A , Robin  , Kurniawan A , Anjani T P
Published: December 2024

Osteochilus spilurus (Bleeker, 1851) is a consumption fish with important economic value for the people of Belitung Island. The exploitation of their capture from river has the potential to disrupt their natural population. The domestication of this fish has reached the first level and continues towards artificial spawning. The main problem in selecting broodstock is the difficulty in sorting male and female fish based on their morphology. Geometric morphometric is used to describe the morphometric and body shape of male and female of O. spilurus. In terms of morphometrics and body shape, O. spilurus exhibits a little amount of sexual dimorphism between males and females. The differ are on morphometrically of pre-anal length and body shape of the anal and caudal penducts. Due to their close resemblance, O. spilurus males and females cannot be chosen using secondary sexual characters for spawning and domestication of broodstock. Instead, primary features must be observed.
Estimation of carbon stock, biomass and CO2 sequestration at mangrove forest in Batu Rusa River and Serata Pasir Padi, Bangka Island
Authors: Akhrianti I , Ningsih T , Wahidin L O , Hudatwi M , Nurhadini  , Gustomi A
Published: December 2024

The aim of this research is to determine the total biomass, carbon stock and CO2 sequestration above ground in mangrove forests in the Baturusa and Pasir Padi River Basins. This research was carried out in October-September 2023-2024, using a non-destructive sampling method based on species-specific allometric equations to find the biomass value of mangrove stands. Data collections were determined using the random purposive sampling method. The result shows that Rhizophora apiculata is the mangrove species that dominates in the Baturusa River, while the Excoecaria agallocha dominates in the Pasir Padi River mangrove forest. The total biomass reserves above ground in the Baturusa River and Pasir Padi River mangrove forests are quite high, namely 195310.4 tonnes/ha, with 188172.2 tonnes/ha for the biomass of the Baturusa River mangrove stands while the mangrove stands in Pasir Padi are 7138.2 tonnes. /Ha. The total above-ground (standing) carbon stock in the Baturusa River mangrove forest is 88440.9 tonnes/ha while in the Pasir Padi River it is 3354.9 tonnes/ha with a total reaching 91795.9 tonnes/ha. The total uptake of CO2 sequestration in mangrove stands in the Baturusa River was 324283.4 tonnes/ha, the Pasir Padi River was 122301.5 tonnes/ha with a total reaching 336585.0 tonnes/ha. Sonneratia alba is a mangrove species that has the highest biomass reserves, carbon stock and CO2 sequestration, namely biomass of 0.701 tonnes/tree, carbon stock of 0.330 tonnes/tree and CO2 uptake of 1.208 tonnes/tree, because it has a fairly large trunk diameter compared to other mangrove species.
Synthesis of nasicon solid electrolyte from tin tailing sand for sodium batteries applications
Authors: Nurhadini  , Harsiga E
Published: December 2024

The use of sodium ion batteries in electrochemical applications is gaining increasing attention due to decreasing lithium reserves. One of the battery component is a solid electrolyte. NASICON electrolyte is a solid electrolyte with the composition Na1+xZr2SixP3-xO12 which has a three-dimensional structure consist of various precursor. Silica is one of the NASICON precursors which can come from tin tailing sand. Therefore, this research aims to synthesis NASICON with a composition ratio (x = 1 and x = 1.5) derived from tin tailing sand by solid state route. Those NASICON is analysed its characteristic by XRD, SEM and EIS. NASICON in x=1 has fewer impurities and void than x=1.5. Moreover, NASICON with composition x=1 has higher conductivity than x=1.5 reaching 1.76 × 10−4 S/cm. Therefore, x =1 ratio in NASICON better than x=1.5 and it can be candidate as a solid electrolyte for sodium batteries.
Environmental sustainability behavior model with responsible consumption: study of Indonesian young household consumers
Authors: Gunawan A I , Februadi A , Hurriyati R , Wibowo L A , Monoarfa H , Christianingrum  , Huda M
Published: December 2024

One of the ecological crisis triggers is unethical behavior in the form of irresponsible consumption, which leads to resource wastage, energy leakage, and a high carbon footprint. Excessive consumption is the beginning of environmental problems as it generates large amounts of waste. Households are the economic sector that contributes the most waste, and demographically, young households tend to be active and have high consumption rates. The consumption behavior of this segment raises concerns as it puts pressure on the environment and sustainable development, which needs to be clarified in this study. This study tests a model of pro-environmental behavior, including environmental concerns and activism in shaping responsible consumption behavior. The model initiated in this research is by the actual phenomena that occur, so it is expected to produce essential insights for environmental planning and management based on aspects of consumer behavior as the main actors in the natural ecosystem.
Green diplomacy through integrated environmental management of small islands in Bintan and Tanjung Pinang Riau Islands Province
Authors: Saeri M , Erawan E , Takwa T K
Published: December 2024

Environmentally based management of island areas is part of forming national power, which is very important to support green diplomacy and an environmentally sound approach. Small islands and Outermost Small Islands (PPKT) in the waters surrounding Bintan and Tanjung Pinang, Riau Archipelago Province, have generally not been managed using an environmental approach, which has prevented them from functioning optimally as national assets. This research aims to explain the importance of managing Small Islands and PPKT in Bintan and Tanjung Pinang and their contribution to the practice of green diplomacy.
Environmental management through tourism development based on communal intellectual property (case in the Bangka Belitung islands)
Authors: Darwance  , Haryadi D , Sari R , Pratama S
Published: December 2024

The tourism industry is currently one of the industries that has an important role in the national development of various countries. The Bangka Belitung Islands, with their natural beauty, have an attraction as a tourist destination. On the other hand, environmental damage is still a major problem in this area, especially due to tin mining. Tin mining, which has been going on for a long time and is massive, has also been destructive and will continue to threaten the survival of local plants and animals. In the context of intellectual property, this is what is called communal intellectual property, which in the tourism industry is one of the attractions, and this has not been developed in this area. This research uses empirical judicial methods, conducting a study of environmental regulations and management efforts through the development of the tourism sector based on communal intellectual property, namely those that are directly related to the local environment. From the results of studies that have been carried out, there has been no direct effort to make environmentally based communal intellectual property a major part of the development of the tourism sector in the Bangka Belitung Islands. The environment, in some cases, is indeed one of the bases, but no one has truly made communal intellectual property the epicenter, such as presenting local flora and fauna. In fact, apart from being attractive, this is also an effort to enforce law from an environmental aspect.
Relationship between soil conditions and road quality degradation
Authors: Yofianti D , Wardanti A , Fahriani F
Published: December 2024

Roads are one of the infrastructures that are greatly needed by the community. One component of the road pavement structure is the subgrade. Road damage may be caused by a decrease in the quality of the subgrade. Therefore, this study aims to explain the relationship between soil conditions and the decline in road quality. The location of the study is on Jalan Lampur-Munggu, Lampur Village, Sungai Selan District, Central Bangka Regency. This study was conducted at STA 0+000 to STA 1+285 which were divided into 52 segments where the length of each segment was 25 m. Soil condition data was taken at 10 points. The results of the study showed that the road pavement condition index value obtained was 44.7, which is in the poor category. Furthermore, the California Bearing Ratio value for the soil conditions obtained was 8.08%, which is classified as quite good. It can be concluded for this case that the degradation in road quality is not affected by the California Bearing Ratio value of the subgrade. However, it is better to still consider other factors of soil conditions that can accelerate road damage.
Land and forest fire control strategy through inter-organizational network in efforts to implement disaster management in Riau province, Indonesia
Authors: Yuliani Febri , Zulkarnaini
Published: December 2024

In addition to harming ecosystems that provide clean air and water, forest and land fires have an effect on human health. The foundation of the network theory is the interconnection of actors. To be effective and efficient, land and forest fire control organizations that involve numerous government agencies or organizations at the national, province, district, sub-district, and village levels need an organizational structure that functions harmoniously and cohesively. This study aims to execute disaster management in Riau Province by analyzing and describing methods for preventing land and forest fires through inter-organizational networks. This study was conducted in the province of Riau, specifically in the Rokan Hilir Regency. The approach is qualitative. Primary and secondary sources of data are needed for this investigation. People who are thought to be knowledgeable about the use of inter-organizational networks in the management of land and forest fires in Rokan Hilir Regency serve as the study’s unit of analysis. The study’s findings include improving organizational structure strategy, coordinating programs across companies, and planning and operations for managing land and forest fires. The study’s recommendations include drafting regional legislation, offering technical assistance for managing land fires and forests, and altering the organizational structure of the Land and Forest Emergency Alert Post Team in Riau Province.
Technical study of blasting geometry to reduce the level of fragmentation at the Air Laya mine site pt. Bukit Asam, Tbk.
Authors: Harsiga E , Tono E P S B T
Published: December 2024

Research was conducted at the PT. Bukit Asam Air Laya Mine Site. The aim of the blasting activity is to explode the B2-C interburden layer in order to obtain Seam C coal. The drilling pattern used is a staggered pattern with a vertical drilling direction. The actual blasting geometry used is with a burden of 7 m, spacing of 8 m, hole depth of 8 m, stemming of 4 m, and powder column of 4 m. The level of blasting fragmentation for sizes greater than 160 cm based on theoretical calculations is 26.49 %, while the target set by the company for boulder fragmentation is no more than 20%. To reduce the level of fragmentation, changes were made to the actual geometry by conducting studies using the RL Ash, CJ Konya, and ICI Explosive theories. From this study, recommendations for the proposed blasting geometry were obtained with a burden of 6 m, spacing of 9 m, hole depth of 11.66 m, stemming of 5.14 m, and powder column of 6.52 m. With these changes in geometry, fragmentation measuring more than 160 cm was obtained at 17.15%, or it can be said to achieve the fragmentation target of less than 20%.
Opportunities and challenges of establishing a nuclear power plant in the Bangka Belitung islands province: juridical and sociological perspectives
Authors: Permatasari B , Situmorang A A C , Ferianda S
Published: December 2024

This study aims to analyze the legal aspects of using nuclear power in Indonesia and the challenges of developing nuclear power plants in the Bangka Belitung Islands Province from a legal and sociological perspective. The research method uses an empirical juridical method. Indonesia already has several regulations governing nuclear energy. However, existing rules cannot yet enable Indonesia to have its nuclear power plant. Apart from that, there are four primary keys to the nuclear legal framework—safety, security, safeguards, and liability for atomic losses. Indonesia must still improve its safeguard and security framework in regulating nuclear energy law. So, the law needs to be amended or replaced. Meanwhile, the opportunity to build a nuclear power plant is due to a regional regulation regulating the Bangka Belitung Islands Province Regional Regulation Number 13 of 2019 concerning the General Regional Energy Plan for 2019-2050 and the abundant potential for thorium. Meanwhile, the challenges are due to resistance from the WALHI community organization and several communities and the lack of regulations at the central level.
Impact of Maxwell–Cattaneo effect on thermal convection instability in vertical porous layer saturated with an Oldroyd-B fluid
Authors: Jia Beinan , Jian Yongjun
Published: December 2024

The investigation focuses on the Maxwell–Cattaneo (MC) effect on the thermal convection instability in a vertical porous layer saturated with an Oldroyd-B fluid. The MC effect modifies the conventional Fourier’s law for temperature by incorporating the upper convective Oldroyd derivative. The flow through the porous layer is modeled by the Darcy‒Oldroyd model. Using the Chebyshev collocation method addresses an Orr-Sommerfeld eigenvalue problem. Analysis of temporal growth rates reveals that the MC effect causes the originally stable flow to become unstable. Furthermore, the study finds double impacts of the MC effect on convection instability depending on whether it is primarily influenced by the fluid or the solid phase. Neutral stability curves highlight a critical threshold for the averaged Cattaneo number (Ca
) of both solid and fluid. When Ca
falls below this critical value, instability is suppressed, but when it exceeds this value, instability is magnified. The analysis also reveals that viscoelasticity parameters can impact the system by either stabilizing or destabilizing it. A rise in the retardation time parameter (λ
2) exerts a stabilizing influence, whereas an increase in the relaxation time parameter (λ
1) exhibits a destabilizing effect.
Dynamic feature separation domain generalization for bearing fault diagnosis
Authors: Cai Haichao , Yang Bo , Xue Yujun , Li Jubo , Xu Yanwei , Yang Xiaokang , Ye Jun
Published: December 2024

Domain adaptation is a research hotspot in the field of bearing fault diagnosis; however, extremely scarce bearing fault sample information limits the development of domain adaptation techniques. Thus, improving the generalization ability of fault diagnosis models is an urgent problem to be solved. Thus, this study proposed a dynamic feature separation domain generalization method for bearing fault diagnosis. The proposed method facilitated the dynamic adjustment of the influence of internal and mutual invariant features on the domain generalization process by learning the relationship between internal invariant features within the domain and mutual invariant features between the domains. This ensured the maximum utilization of invariant information in the features and obtainment of a domain-invariant bearing fault diagnostic model. Consequently, the fault diagnosis capability of the model was improved and the shortcomings of the poor generalization capability of existing models were alleviated. Finally, the effectiveness of the method was verified by comparing several bearing-fault datasets.