bluuebunny/crossref_metadata_2025_split huggingface dataset:
Utilization of styrofoam in lightweight concrete as a soundproof wall
Authors: Ngudi H C , Sudharto P H , Ernie S 
Published: December 2024

Abstract
Lightweight concrete panel walls are an innovation in concrete used for building walls. Since conventional concrete has a specific gravity of about 2400 kg/m3, it is quite heavy, creating a need for new, lighter, and soundproof materials. A new alternative to achieve lightweight materials is the combination of normal concrete and Styrofoam. In lightweight concrete construction that has compressive strength according to needs, it is one of the desired alternatives. This research aims to evaluate the utilization of the properties of Styrofoam as the main material in making lightweight concrete which has a volume weight of less than 1900 kg/m3 and adequate compressive strength. The method is carried out by making a cylindrical test object with a diameter of 15-30 cm which is tested with a concrete press to measure the compressive strength of the wall. Identify the quality of compressive strength of lightweight concrete by adding material Styrofoam with a Styrofoam material ratio of 1Pc: 2Pc: 3 styrofoam, 1 Pc: 1.5 Sand: 2.5 Styrofoam, and composition 1 Pc: 1.25 Sand: 2.75 Styrofoam. The literature review regarding lightweight concrete made from Styrofoam is on mechanical performance, durability and soundproofing capabilities compared with laboratory research. The results of this research on lightweight concrete mixed with styrofoam have the potential to reduce the specific gravity of concrete so that it affects the weight of walls as a building material.
Evaluation on implementing green stormwater infrastructure to reduce runoff and conserve water in Banyumanik, Semarang
Authors: Sarminingsih A , Nugraha W D , Shafanisa A A 
Published: December 2024

Abstract
Flood problems do not always occur identically in areas with low-lying topography or coastal areas. Floods also often occur in areas with relatively high topography, for example in the Jalan Dr. Setiabudi Banyumanik Semarang. In some places the area is concave, the drainage system is inadequate so flooding often occurs. The aim of this study is to evaluate the existing drainage capacity and to analyse efforts to plan a sustainable urban drainage system by implementing Green Stormwater Infrastructure (GSI). The GSI type is adjusted to land availability and soil characteristics. Hydrology and hydraulics analysis methods are used is SWMM 5.2. Based on a combination of spatial, hydrological and hydraulic analysis of existing conditions, 55 overflows were obtained. Efforts to reduce runoff are planned by placing GSI in locations where the land is available. The area that allows GSI to be implemented is around 28.4 Ha of 67.9 Ha total drainage catchment area, with GSI in the form of 343 infiltration wells, 1.0 m in diameter with a depth of 5.0 m. Implementing infiltration wells can reduce the total runoff upto 23.32%. To deal with excess runoff, the channel dimensions have been enlarged, especially at the outlet in the downstream area.
Improving Eco-efficiency of crude palm oil production process using life cycle assessment
Authors: Hartini S , Saptadi S , Nurmilatina  , Sari D P , Wicaksono P A 
Published: December 2024

Abstract
Previous research in Crude Palm Oil (CPO) industry in Indonesia focused on added value of waste from CPO production and assessment of environmental impacts caused by CPO production. There has been no research that analyzes environmental impact from CPO production waste processing and eco-efficiency analysis of CPO production. CPO production waste can be palm oil mill liquid waste (POME) and palm oil fuel ash (POFA). Purpose of this study are to examine the potential for reducing environmental impacts and increasing the eco-efficiency index (EEI) from waste processing in the CPO production. This study used life cycle assessment (LCA) method. From LCA analysis, its known that there are 3 largest impacts categories from this study, namely carbon footprint, ecotoxicity-freshwater and eutrophication. The gate-to-gate process from the existing conditions of CPO processing has an EEI of 0.95. This value is included in the affordable and not sustainable category. The scenario of processing POME waste into liquid organic fertilizer can increase the EEI to 5.10, this score included in the affordable and sustainable category.
Environmental Sensitivity Firm, Environment Performance Rating, Profitability, and Carbon Disclosure – Does Firm Size Matter?
Authors: Mukhibad Hasan , Wahyuningrum Indah Fajarini Sri , Pertiwi Meilani Intan , Gymnastiar Hamzah Fahreza , Lestari Tiara Dwi 
Published: December 2024

Abstract
The study aims to examine how Indonesian manufacturing sector companies’ carbon disclosure is influenced by their environmental sensitivity firm profile, environment performance rating, and profitability. The study also analyses whether firm size has a moderating role in the environment sensitivity firm profile, environment performance rating, and profitability–carbon disclosure association. The study includes 38 manufacturing sector companies listed in Indonesia with 152 firm-year observations. System Generalized Method of Moment (Sys-GMM) analysis using data for four years, from 2019 to 2022, is carried out. The study reveals a negative influence of environmental performance rating on carbon disclosure. The environment sensitivity firm profile and profitability do not influence carbon disclosure. Additionally, firm size has a positive moderating effect on environmental performance rating on carbon disclosure.
Harmonizing tourism and nature conservation: a governance model for sustainable tourism villages in Indonesia
Authors: Kristanti Dwi , Purnaweni Hartuti , Dwimawanti Ida Hayu , Yuwono Teguh 
Published: December 2024

Abstract
Developing tourism in villages often grapples with the challenge of balancing growth with conservation. Poor management may lead to harm and the depletion of resources. This study uses case studies from Pentingsari, Nglanggeran, and Candirejo to examine governance models for fostering tourism in villages. The research adopts an approach through field observations in in-depth interviews and document analysis to explore this issue. Findings reveal that these villages have implemented a governance structure involving collaboration among government bodies, private enterprises, and residents. The active involvement of the community emerges as a factor in preserving the environment and indigenous knowledge. Furthermore integrating ecotourism principles and empowering communities contribute to striking a balance, between tourism development and nature preservation. The study presents a governance model that can be replicated in tourist villages to promote sustainable growth.
Analysis of Community-Based Sanitation Implementation in Pariaman City
Authors: Frinaldi Aldri , Mubarak Adil , Afdalisma  , Rezeki Angga Putra Tri , Rista Mia , Helmi Rahmadhona Fitri , Wilis Ratna 
Published: December 2024

Abstract
Proper sanitation can have health impacts and social environmental impacts if it is not implemented with optimal community-based governance in Pariaman City. This research aims to analyze the implementation of a proper Community-Based Sanitation Program in Pariaman City. This type of research is qualitative with a policy research approach. The results show that the implementation of the Community Based Sanitation Program has not reached the Universal Access target of 100-0-100, so it is categorized as not yet feasible. This is also because 100% coverage of clean water access has not been achieved, so the 0% target has not been achieved. This area is not a Underresourced neighbourhood, so it appears that the 100% adequate sanitation target has not been achieved. However, based on data in the field, there are still many infrastructure facilities that are not functioning and have not been repaired for sustainability. Beside that, there are also problems such as the development of drinking water and sanitation that is not yet sustainable, community participation is still low, and management institutions that are not yet well integrated due to the lack of capacity of Community Level Management Organizations to manage.
Community involvement in the development of nagari-based sustainable waste management
Authors: Mubarak A , Frinaldi A , Syamsir  , Syolendra D F , Fitriyanti W , Rezeki A P T 
Published: December 2024

Abstract
Effective and sustainable waste management is a significant challenge for many communities, especially in Nagari (Village), which has local wisdom and a solid social structure. This research aims to analyze community involvement in the development of Nagari-based sustainable waste management, focusing on the active participation of the community in every stage of waste management, from collection sorting to final processing. The research method used is qualitative, with data collection techniques through in-depth interviews, participatory observation, and document analysis. The research was conducted in Nagari Sikabau, Dharmasraya Regency, West Sumatra Province, Indonesia. The results show that community involvement in Nagari-based sustainable waste management improves waste management efficiency and strengthens social and cultural relations between residents. Community participation in waste management education and training programs and the formation of Nagari-based working groups proved effective in creating behavioral changes and environmental awareness. In addition, support from the local government (Nagari) and synergy between various stakeholders (universities) are determining factors for the success of this program. This research concludes that Nagari-based sustainable waste management can be a practical and applicable model in other areas with similar characteristics.
Analysis of environmental impact on the production process of packaged drinking water using the life cycle assessment method
Authors: Sari D P , Nugraeni A R , Hartini S. , Azzahra F , Wicaksono P A 
Published: December 2024

Abstract
PT X is a company engaged in the bottled drinking water industry. In order to carry out its activities, the company strives to create a better future through a healthy lifestyle, earth, and ecosystem. Therefore, this factory needs to conduct a Life Cycle Assessment (LCA) as part of the company’s commitment to environmental conservation. Based on the LCA results assessment using the SimaPro software version 9.1.1.7 with the eco-cost 2024 V1.0 method, it can be seen that the three stages of the production process that are hotspots are the process of making preform bottles with a contribution of 53.85% or IDR 29,303,310,488, followed by the packing process with a contribution of 25.24% or IDR 13,733,242,930, and the distribution process with a contribution of 9.75% or IDR 5,307,391,210. The improvement recommendations given include the implementation of an air recovery system to reuse residual air in the process of blowing preform into bottles, improvement of road infrastructure in the distribution area, implementation of truck use policies, enforcement of regulations with certification and testing motorized vehicles transporting goods and the implementation of a hybrid solar PV system to improve energy efficiency and reliability as well as optimize space for PV installation.
Evaluating the Performance and Waste Reduction Strategies of Temporary Waste Disposal Site 3R Facilities in Sukoharjo: A Case Study of Anugrah Palur
Authors: Kisworo Wahyu , Suhardono Sapta , Wayan Koko Suryawan I 
Published: December 2024

Abstract
In 2023, the Temporary Waste Disposal Site 3R facilities in Sukoharjo have shown varied performance, with 4 out of the 12 facilities operating at optimal levels. Among these, Temporary Waste Disposal Site 3R Anugrah Palur stands out as one of the facilities functioning efficiently. This research aims to investigate the waste management mechanisms and strategies for waste reduction implemented at Temporary Waste Disposal Site 3R Anugrah Palur. To achieve this, a mixed-methods approach was employed, encompassing load count analysis, as well as observations and interviews with key stakeholders. The findings of the study revealed that over a span of eight days, Temporary Waste Disposal Site 3R recorded an average daily waste generation of 724.76 kg. This equates to an average household waste production rate of 2.07 kg per family per day, or 0.69 kg per individual. The facility demonstrated a high recovery factor of 89.11%, successfully managing to process and reduce 645.86 kg of waste each day. These results highlight the effectiveness of the waste management practices at Temporary Waste Disposal Site 3R Anugrah Palur and provide valuable insights into efficient waste reduction strategies that can be applied in similar contexts.
The first initiative of dna barcoding of palaquium rostratum (miq.) burck from Bangka, Indonesia
Authors: Arsyadi A , Saputri R 
Published: December 2024

Abstract

Palaquium rostratum (Miq.) Burck with a local name Nyatoh, is the floral identity of Bangka Belitung Islands and has widely potential uses, making conservation efforts for this species important. However, there is still insufficient data about Nyatoh including information on its genetic diversity. In this study we used the chloroplast DNA (rbcL) as gene markers to identify P. rostratum in Bangka Island. The method included DNA extraction, PCR amplification, and DNA sequence analysis. Total 606 bp of rbcL sequences was obtained from Nyatoh leaves. When comparing to other DNA references using BLASTn, the barcode region of P. rostratum in this study showed up to 99% similarity with Palaquium sp. collected from Temburong, Brunei Darussalam. Further, phylogenetic analysis revealed the DNA barcode marker used were able to assign correctly to genus level while they showed a lower or no success in assigning taxa to species. For future, we recommend other DNA barcode or combination (e.g. ITS, rbcL + matK) to have a higher level of discriminatory power.
Bioplastics based on waste paper cellulose, glycerol, and chitosan: the evaluation of mechanical properties
Authors: Puspita I , Sari P , Roehafi F , Novita  , Junaidi  , Latupapua F C 
Published: December 2024

Abstract
Bioplastics are an alternative to conventional plastics to overcome environmental problems due to the accumulation of plastic waste. Cellulose is one of the materials that can be used as reinforcement for natural polymer-based bioplastics. One material that has a very high cellulose content is waste paper. This study was conducted to make bioplastics based on waste paper cellulose, glycerol, and chitosan. The mass of waste paper cellulose was the variable that varied in this study. The parameters of mechanical properties evaluated in this study include tensile strength, elongation, degradation rate, and water absorption. The results showed that increasing the mass of added cellulose increased the tensile strength value of bioplastics but decreased the elongation value. The results also show that increasing cellulose mass can reduce the water absorption of bioplastics produced. The sample with the highest tensile strength value is the addition of 3 grams of waste paper cellulose, with a tensile strength value of 1.99 MPa and an elongation of 4.4%.
Implementation of Supervised Learning Algorithm to Predict Climate Factors in Pangkalpinang
Authors: Wahyuni D , Amelia R , Halim N 
Published: December 2024

Abstract
Currently, the world is experiencing erratic climate conditions, characterized by an increase in frequency and intensity of extreme weather, as well as significant climate changes such as an increase in global temperatures. Pangkalpinang city is one of cities with the highest population density in Bangka Belitung Islands. This population density contributes to climate change through increased greenhouse gas emissions from transportation activities, industry, and high energy consumption. Conversely, climate change also has an impact on environmental conditions and the quality of life, making it important to predict climate factors to effectively manage their impact. The purpose of this research is to determine the prediction of climate factors in Pangkalpinang City. In this research, three Supervised Learning algorithm research methods were used, including Linear Regression, ANN (Artificial Neural Network), and XGBoost Regressor (Extreme Gradient Boosting Regressor). Based on the results of the research that has been conducted, it shows that the XGBoost Regressor model provides the best performance with an MSE value of 79.304 and the smallest MAPE value of 16.912. Beside it, the R-squared value is 0.654. This model shows a good ability to predict climate variables compared to other methods. This finding can be the basis for more appropriate policy making in anticipating and managing the impacts of climate change in Pangkalpinang.
Life cycle analysis of a solar photovoltaic system in a Philippine university
Authors: Lunag M N , Tandoc R E , Camat R K S , Capito R C , Castañeda L M F , Cobarrubias E P P , Dela Cruz J J N , Focasan J N M , Perez K I Q , Rung J T H M 
Published: December 2024

Abstract
Renewable energy sources have been growing in popularity because of the Republic Act 9513, also known as the Renewable Energy Act 2008. With these, various universities in the Philippines have already installed solar photovoltaic (PV) systems. However, details such as carbon emissions reduction and the efficiency of PV systems in Philippine universities still need to be included as baseline data for policy formulation and sustainability. This study aims to evaluate the solar PVs installed at Saint Louis University as part of its climate change advocacy. The environmental Life Cycle Assessment (LCA) approach was conducted through the OpenLCA software with the Ecoinvent database. Results showed that the PV panels installed in the university are economically and environmentally beneficial, wherein the installed panels’ break-even point and cost-benefit ratio are 7 years and 4.5, respectively. Through the cradle-to-grave analysis from manufacturing, transportation, installation, operation, and recycling, the solar PV system yielded an annual emission savings of 278,369 kg of CO2 equivalent. Moreover, the GHG emission payback period was only 2.22 years, with a 93% GHG reduction from utilizing solar PV systems instead of coal-fired power plants. With the summarized results of LCA, this paper hopes to contribute to the solar energy data on Energy Payback Time (EPBT) and GHG emission rates.
Evaluation of fuel deposit and smoke emissions of Indonesian palm biodiesel B100 enhanced by BHT additive in a stationary diesel engine
Authors: Ma’ruf M , Wijayanti S P , Soewono R T , Haryono I 
Published: December 2024

Abstract
As a tropical country, Indonesia has various plants that can be used as alternative energy sources, including palm oil as a biodiesel material. The use of biodiesel at a relatively high ratio continues to be encouraged by the government through various policies. The application of high concentrations of biodiesel in diesel engines needs to be supported by a series of studies to solve some of the problems that may occur and to ensure that no negative impacts occur. Oxidation stability and deposit formation are the main concerns in biodiesel use. In this study, an evaluation of B100 and B100+1000 ppm BHT fuel was carried out to determine its oxidation stability and its effect on the formation of deposits in the combustion chamber. Deposit evaluation is carried out on a stationary engine running for 70 hours (10 hours per day) with a constant load of 70% for each fuel. The addition of 1000 ppm BHT to B100 increased the oxidation stability by 171%, reduced smoke emissions by 24%, and lowered total deposit formation in the combustion chamber by 25%. A decrease in deposits was observed on the piston (32%), cylinder head (8%), and exhaust valve (23%). However, a slight increase in deposits was noted on the intake valve (11%) and injector tip, as seen from the photographic comparison. Importantly, the increase in injector tip deposits did not affect engine performance during the 70 hours of testing.
The yield and economic potential of local robusta coffee in Bangka Belitung
Authors: Zasari M , Kartika  , Evahelda  
Published: December 2024

Abstract
Coffee is an important commodity for the economy of the Bangka Belitung people. The development of people’s coffee plants becomes more efficient by utilizing local genetic sources. The description of the yield and economic potential of local coffee plants is useful for determining strategies for developing coffee plants in Bangka Belitung. The research was aimed to identify the yield and economic potential of local robusta coffee in Bangka Belitung. The research was conducted using the purposive sampling method on three healthy and vigorous coffee plants in people’s coffee plantation located in several villages in Bangka Tengah Regency, namely Lampur, Celuak, Pading; Bangka Regency, namely Petaling Banjar, Mengkubung; and Belitung Timur Regency, namely Jangkang and Limbongan. The yield potential b “Descriptors for Coffee (Coffea spp. and Psilanthus spp.)” by the International Plant Genetic Resources Institute (IPGRI). The observations of yield characteristics are displayed tabularly and descriptively. Phenotype variability were analyzed using the formula suggested by Singh & Chaudari (1979). The feasibility of coffee farming was analyzed using the Benefit Cost Ratio (net B/C ratio) and Internal rate of return (IRR) equation. The results of the study showed that the yield characteristics of local robusta coffee in Bangka Belitung were diverse with narrow phenotypic variability. Based on the number of productive branches, number of internodes, number of bunches, number of fruits per bunch, and weight of 100 dry bean, the Petaling Banjar accession has the highest yield. Financially, coffee farming is feasible as a plantation crop business for coffee farmers in Bangka Belitung.
Comparative downdraft gasification performance using falcata wood pellets and chips
Authors: Simpao F T , Espina R U , Zamora R M 
Published: December 2024

Abstract
Tropical off-grid regions are rich in biomass resources like Falcata, a fast-growing tree species. This study examines the optimal form of Falcata wood, comparing pellets (FWP) and chips (FWC) for community-based gasification systems using a downdraft gasifier. Key methods included feedstock uniformity assessment, syngas composition analysis, and efficiency calculations. Results showed FWP provided better uniformity and consistent feeding, while FWC may need further processing for improved efficiency. FWC had a higher heating value (17.92 MJ/kg) and volatile matter (84.29%) than FWP, which had more fixed carbon (18.20%) but also higher ash content (1.98%). FWP produced syngas with higher CO and H2 concentrations, leading to better overall syngas quality, while FWC yielded more non-combustible CO2. Energy Conversion Efficiency (ECE) and Gas Efficiency (GE) indicated that FWP is four times more effective and twice as efficient for gasification compared to FWC. The study concludes that both forms can produce high-quality syngas, but further research is needed to assess the economic viability and optimize gasification parameters for improved efficiency.