bluuebunny/crossref_metadata_2025_split huggingface dataset:
The effect of land use change to surface runoff discharge in the POMPONG watershed at Bangka regency
Authors: Pertiwi P C , Hisyam E S , Yofianti D 
Published: November 2020

Abstract
Changes in land use cause a reduction in water infiltration, and can cause environmental damage such as floods and inundation. Flood inundation occured freuently every year. In addition, other environment damage is a change in morphological characteristics around the river. This happened in the Pompong watershed with an area of 7,701.192 hectares located in Bangka Regency. The purpose of this study was to determine the effect of runoff coefficient (C) and total surface runoff discharge (Qp). The method used in this study is the Nakayasu HSS method with a return periode of 50 years. Land use changes were analyzed from 2009 to 2018. The result of the analysis showed that the amount of surface runoff discharge (Qp) in the Pompong watershed was strongly influenced by land use changes. The change occurred from 2012-2013 with a decrease in C value of 0.001 resulting in a Qp values of 0.943 m3/second, a C value in 2014-2015 decreased by 0.007 resulting in a Qp value of 5.395 m3/second, in 2015-2018 there was an increase a C value of 0.116 results in a Qp values of 100.512 m3/second.
The effectiveness of detention basin in Soursoup (Annona muricata L.) farming land of Selopamioro village – Bantul, Yogyakarta
Authors: Kurniawan R , Ngadisih  , Murtiningrum  , Gupitakingkin A , Dhiyaurrohman H 
Published: November 2020

Abstract
Soursop fruit is rich in health benefits. The soursop plants (Annona muricata L.) have a great potential to be cultivated in Indonesia. It requires an enough water availability in the land to optimize biomass production through photosynthesis. Soursoup farming in dry land Selopamioro Village – Bantul, Yogyakarta needs irrigation. Due to geomorphological condition, water resources for irrigation mainly from harvested rainfall in detention basin (local name “rorak’”). This study was aimed to determine the effectiveness of detention basin Soursop farming land in storing the rainfall which later used them for irrigation. The material includes the coordinates of the research location, Soursop farming land boundaries, and detention basins. Furthermore, the daily climate data in the form of rainfall, temperature, net solar radiation, wind speed, atmospheric pressure and relative humidity were used to calculate reference evapotranspiration. The reference evapotranspiration (ETo) was computed by Penman-Monteith approach. Later, it was used to determine plant evapotranspiration (ETc) using the soursop plant coefficient (Kc) from previous study. The effectiveness of detention basins was evaluated from water balance analysis. It was applied to assign annual irrigation water requirement in Soursop farming land. This study defined average ETo of Soursop farming land in Nawungan orchard was 5.0 mm/day, while the average ETc was 3.0 mm/day. There were three detention basins in Soursop farming land, laid on the upper slope and two on the middle slope. Annual irrigation water requirement was 4287 m3;. During this period, three detention basins could meet the water need of plant for 84 days. So, more detention basin should be built in Soursop farming land - Nawungan orchard.
Citrus x microcarpa bunge fruit extract as antibacterial against staphylococcus aureus
Authors: Roanisca O , Mahardika R G 
Published: November 2020

Abstract

Citrus x microcarpa Bunge is a plant that is used optimally by the people of Bangka Belitung known as the ‘Jeruk Kunci’. Utilization of this plant in the fruit is used as an acid enhancer in food and is made in the form of syrup. So that the jeruk kunci fruit waste is widely available and has not been utilized.based on literature, Citrus x microcarpa contains flavonoids and a monoterpeneshydrocarbon. Bioactivity which belongs asantimicrobial, antibacterial and antioxidant. Therefore, jeruk kunci fruit waste has the potential to be developed as an antibacterial herbal medicine based on literature studies. Citrus x microcarpa Bunge extract was obtained by maceration for 3 x 24 hours using ethanol solvent. Then phytochemical testing was conducted qualitatively using several reagents and quantitative phytochemical testing was carried out using functional group analysis contained in the extract uses the Fourier Transform Infrared (FT-IR) at the wavenumber region 4000-400 cm-1. Then, determination of antibacterial activity using the disk diffusion method. Based on FT-IR spectrum data analysis Citrus x microcarpa extract contains tannins. The results of antibacterial testing of Citrus x microcarpa Bunge extract obtained concentration of 20%, 40% and 60% has a relatively strong antibacterial inhibition. whereas for 80% and 100% concentrations the ability to inhibit is very strong.
Optimization of maize (Zea mays L) cultivation in post tin mining land
Authors: Lestari T , Apriyadi R , Hartina  
Published: November 2020

Abstract
Post tin mining land can be used as agriculture land with ameliorant application and plant spacing modification. This research aimed to study the ameliorant type and plant spacing that affects the growth and yield of maize in post tin mining land. This research was conducted in Post-Tin mining land, Bangka, from February to May 2020. This research used Factorial Randomized Block Design with two factors and three replications. The first factor was ameliorant application consisted of Topsoil (K1), N, P, K + Topsoil (K2), Block compost of cassava peel waste + Topsoil (K3). The second factor was plant spacing (30cm x80 cm (J1); 50 cmx60 cm (J2); 70 cmx40 cm(J3)). The result showed that ameliorant application gave a significant effect on the growth and yield of maize parameters in post tin mining land. Plant spacing gave the best effect on cop production/ha, dry seed weight, and dry seed production/ha. NPK + Topsoil ameliorant with 30 cm x 80 cm plant spacing gave the best interaction on leaves number, cop diameter, and dry seed weight of maize in post tin mining land.
The amelioration of tin tailings with arbuscular mychorrizal fungi and liquid biofertilizer for pepper cultivation
Authors: Inonu Ismed , Nurtjahya Eddy , Sumalia  
Published: November 2020

Abstract
The sand tailings from tin mining activities, which is low productivity, could be improved for plant cultivation by ameliorating with materials which contains mutual microorganisms. The aims of this research were to investigate the influences of arbuscular mychorriza dosages and liquid biofertilizer concentration on the growth of pepper in tin tailings media. This research was conducted to determine the effect of mycorrhizal dosages and biofertilizer concentration on the growth of pepper at sand tailings media in polybags. It was conducted at the Experimental and Research Station of Bangka Belitung University, Bangka. This study used Completely Randomized Design with two factors and three replications. The first factor was mycorrhizal dosages (0; 10; 20 g/plant), and the second one was liquid biofertilizer concentration (0;1;2;3 mL/L). The pepper growth variables were observed at 16th weeks after planting. The results showed the treatment of arbuscular mycorrhizae dosage was significantly influences on plant’s height, stem diameter, number of internode, number of leaf, total leaf area, and percentage of infected root. Amelioration of 20 g/plant arbuscular mycorrhizae was the most effective for pepper growth. Biofertilizer concentration was no significantly influences on all of the variables. Combination of 10 g/plant arbuscular mycorrhizae and 2 mL/L of biofertilizer gave the highest pepper stem height, and combination of 20 g/polybag of mycorrhizae and 2 mL/L of biofertilizer showed the widest of pepper leaf area on sand tailings media.
Hydroxyapatite from natural sources: methods and its characteristics
Authors: Afriani F , Siswoyo  , Amelia R , Hudatwi M , Zaitun  , Tiandho Y 
Published: November 2020

Abstract
Hydroxyapatite is widely known as bioceramics with excellent biocompatibility. Also, hydroxyapatite has biodegradable properties that can support the bone therapy process and can be applied as a bone scaffolds. In recent years, the preparation of hydroxyapatite from natural sources is exciting to be developed. This is because, natural resources, especially in the form of waste, are very abundant and can produce hydroxyapatite with good osteoconductive properties. In this review article, we conducted a study related to the comparative preparation methods and characteristics of hydroxyapatite derived from natural waste such as eggshells, animal bones, and cockle shells. Some of the main characteristics reviewed include crystal characteristics, particle size, and morphology of hydroxyapatite particles.
Development of Work Breakdown Structure (WBS) dictionary and checklist for safety planning on dam construction project
Authors: Pradika P A , Latief Y , Muslim F , Riantini L S 
Published: November 2020

Abstract
As one of the essential infrastructures needed for water resources, dam construction project requires comprehensive planning and effective standardization to accommodate the needs during the construction process. Also, the construction plan should be developed to minimize failures that can cause work accidents or other safety issues. Therefore, the development of WBS (Work Breakdown Structure) is a vital component in the planning process. In supporting these, a WBS dictionary and checklist are also needed to support the planning and control process of the project. Studies have found that these documents provide the details of deliverable, activity, and schedule information of each WBS components of the project. Also, these can be used for safety planning due to the hierarchy structure of each work package, hence making it easier for safety planning in each activities. This study was conducted by expert validation method through a semi-open questionnaire and analyzed using a descriptive statistical analysis method. The results of the study are the WBS dictionary and checklist for dam construction project, that can be the guideline for its safety planning. The study had also found the details of the construction method and resources for every work package in the dam construction project.
Geostatistical Modeling of Cassiterite in Merawang District, Bangka Regency
Authors: Amelia R , Guskarnali  
Published: November 2020

Abstract
The impact of tin mining not only removes soil fertility but changes existing landscapes and ecosystems. It also produces tailings and large openings (pit) in the post-mining land. As shown by the visualization of land tones and topography in Merawang District, Bangka Regency, which was damaged by active mining. Based on the visualization of the baseline, this area has unique sand characteristics and contains cassiterite minerals and is of economic value. For this reason, this study aimed to look at the distribution patterns of cassiterite minerals that existed at six post-mining land sites in Merawang District based on the sand characteristics at these locations. In this case, the sand sample is tested using XRF Portable, so that it produces cassiterite content, namely Tin (Sn), Zircon (Zr), Titanium (Ti), and Sulfur (S). Based on the geostatistical method the best model of anisotropic semivariogram, there is a relationship between post-mining locations and the distribution of the cassiterite mineral content is more to the northwest of Merawang District. The estimated pattern of distribution of these four minerals provides an overview that can minimize environmental damage due to mining activities in Merawang District, Bangka Regency, Bangka Belitung Islands, Indonesia.
Characterization of chemical content tailings sand and water from the tin post-mining in Merawang Subdistrict, Bangka Regency
Authors: Guskarnali  , Mahardika R G , Sandy B D A 
Published: November 2020

Abstract
The characteristics of the six sand samples taken from the location of the former tin mining land on average contain heavy metals such as Ti, Sn, Mn, Pb, Cu, Zn, Cu, and As. Nb rare earth metal contains all sand samples except PDTF 1. The highest content is in the PDTF 2 sample which is 103 ppm. While the Y metal content is found in samples of PDTF 2A, 3, 3A, and 4. The highest content for Y metal is in the sand sample PDTF 3A with levels of 59 ppm. The largest metal content of the six samples is generally iron (Fe) and followed by sulfur (S). There are only a few samples that contain element V, namely in samples 2A, 3A and 4. The highest Fe content is in the water sample PDTF 2A which is 0.953 mg / L. This value is not much different from the Fe content in the PDTF 1 sample (0.923 mg / L). Sand samples in PDTF 3 A have the highest Fe content but water close to the PDTF 3A sampling location has the lowest Fe content compared to the other five samples.
An alternative policy of livestock farmers’ empowerment towards environmental vision
Authors: Yulia  , Bahtera N I , Herdiyanti  , Hayati L 
Published: November 2020

Abstract
Livestock is one out of five agricultural sub-sectors. The livestock farmers in South Bangka face the difficulty in ensuring the availability of skilled manpower in livestock farming. The objective of the study is to understand the socio-economic of livestock farmers and to analyse the alternative policy related to the environmental vision through livestock farmers’ empowerment. A qualitative descriptive approach was used to analyse the data using SWOT analysis in determining the alternative policy on the livestock farmers’ empowerment in visioning the sustainable environment. The study discovered that although multi-ethnic society remained, the horizontal conflict was never revealed. The majority of livestock farmers were at low socio-economic status households. It suggested that the policymaker should design the livestock farmers’ empowerment towards the environmental vision by providing environmentally friendly livestock production. The program can vary such as modernizing the livestock breeding system, increasing the added value, creating ecotourism in grassland conservation, and forming the ecotourism guide.
Framework of life cycle assessment on nutmeg syrup processing
Authors: Trisna  , Muhammad  , Saptari M A 
Published: November 2020

Abstract
This study aimed to design the life cycle assessment (LCA) framework on two methods of the nutmeg syrup production process. The difference between those two ways based on how to eliminate tannin in nutmeg flesh, namely: using a salt solvent and albumin. There are three environmental impacts considered in the framework: gas emissions, noise levels, and human energy consumptions. Nutmeg syrup processing has a long process that each step consists of several activities which require resources, including humans, raw materials, water, energy, machine, and tools. The environmental impact needs to be measured for the sustainability of the industry. The stages carried out in this study, including field observations, data collections, establishing LCA framework based on ISO 14044 involving defining goal and scope, identifying inventory analysis, assessing environmental impacts, recommendations for reducing environmental impacts. This LCA framework can be used as the basic to carry out LCA on nutmeg syrup production. A decision-maker can use that LCA result to choose the best production process to reduce environmental impact so they can produce an environmentally sustainable industry.
An analysis on the impacts of load types, load capacities installed and power generated by the inverter towards disturbance on an on-grid solar power plant
Authors: Gusdhi R R , Sudiarto B 
Published: November 2020

Abstract
Research regarding 9-150 kHz disturbance keeps increasing in the last few years, there are numerous reasons for this occurrence, including: the rise of the usage of electronic device that can generate high frequent disturbance such as fluorescent lights and solar inverters, PLC utilization used for communication on 9-150 kHz frequencies, and lastly the emergence of reports on disturbance impacts. In consideration of the rise of solar inverter usage in the last few years, this paper focuses research accounting impacts of load type, capacity, and power supplied by the inverter to disturbance in the 9-150 kHz frequencies. The system is connected with PLN, hence its categorization as ON-Grid. For power measurement facilitated with the PQA, and disturbance with the picoscope, which results are turned to frequency domain to ease the analysis. The results of the research show that the linear load of incandescent light bulb and nonlinear CFL bulb have similar trends. When the load capacity is increased, generated disturbance also increases linearly, a corresponding thing happening to power increase supplied from the inverter. The higher the power supplied from the inverter, the bigger the disturbance generated in the system. Both trends ensue on incandescent light bulb loads and fluorescent bulbs.
Application of energy management system in auxiliary power consumption at combined cycle power plant
Authors: Pratama M A , Sudiarto B 
Published: November 2020

Abstract
Reliability and efficiency are a power-plant’s commitment to the government in anticipating and overcoming the threat of energy crisis and the environmental impact of energy consumption. The demand for a highly-efficient operation has sparked competitions among power generation industries. The Energy Management System was adopted to evaluate the energy consumption for powering-up electrical equipment in a power plant operation. It is also defined as in-house usage. This study was conducted to analyse Energy Management System compatibility in combined-cycle power plants, utilising Pareto Diagram to discover the most significant consumption of electrical equipment, resulting in the likelihoods of energy and cost savings. This study proposed a mathematical opportunity of saving 342 MWh energy and boosting revenue by 410 million Rupiahs or 28 thousand US Dollars in one year.
Particulate air pollution in Indonesia: quality index, characteristic, and source identification
Authors: Istiqomah N A , Marleni N N N 
Published: November 2020

Abstract
The growth of urbanization, industrialization, and economic development in many areas in Indonesia contributes to the rise of particulate matter (PM) in the atmosphere. PM is strongly correlated with the severe air pollution that can lead to several health problems and early mortality. Other than continuous concentration monitoring, a good understanding of chemical characteristics and sources of PM is important for effective management and mitigation of air pollution. The aim of this study was to summarize the spatial distribution of the PM (PM2.5 and PM10) concentration level, chemical characteristics, and sources apportionment in several cities in Indonesia based on systematic Scopus and Google searches for the period of publication year between 2008 to 2019. The studies of 10 cities showed most of the cities’ PM2.5 and PM10 average concentration have exceeded the annual average standard of both Indonesian regulation and WHO standards. Generally, traffic emissions were the majority sources, followed by biomass burning and dust emission. Forest and peat fires did contribute to high biomass burning emission in the downwind cities. The findings help to give the image of the status and the nature of particulate air pollution problems in Indonesia. Current issues and future research needs were also discussed.
Politics of environmental law in relation to mining in Bangka Belitung: A mapping
Authors: Haryadi D , Ibrahim  , Darwance  
Published: November 2020

Abstract
Legal policy is an official policy that is enforced by either adding new laws or by replacing old laws with new ones in order for a country to accomplish its goals. In environmental context, attention to legal policy becomes crucial, especially when associated with massive mining that takes place in some areas. In other words, mining activity in all its forms and operational methods is bound to be influenced by government’s environmental policies, including those in the form of laws and regulations. Since environment and mining affect each other, they are inseparable. The substances of environmental policies affect policies in the mining sector. Hence this normative study aims to do a mapping of environmental policies in regards to tin mining in Bangka Belitung. The data collection technique employed in this qualitative study was literature review, with laws and regulations as its primary data. This study used two approaches, namely statute approach and conceptual approach.
Acceleration model for tourism industry recovery based on environment post COVID-19
Authors: Zukhri N , Rosalina E 
Published: November 2020

Abstract
The Covid-19 pandemic has hit the tourism industry globally. Bangka Belitung Islands Province, which has established the tourism sector as one of the leading sectors in moving the regional economy. It felt a significant impact due to the Covid-19 pandemic. This study aims to create a model of acceleration. When the condition of the recovery of the post-COVID-based environment tourism industry. in the Bangka Belitung Islands Province. The study used in this paper is qualitative. By using three data collection techniques, interviews, observation, and documentation. The selection of studies is based on the consideration to be able to dig up information in more detail. So that a model can be produced. It can acceleration the environment-based tourism industry in the Bangka Belitung Islands Province. The findings of this study have produced a model that is used in two stages when surviving and actuating. The model that can be used when surviving is the “New Normal” health protocol. In this concept, the promotion used is online and offline. By using the services of influencers, travelers. At the time of actuating a sustainable tourism model. It uses IT that is connected to all parts involved in the tourism industry.
Impact of adoption of agricultural extension services on farm households food security in Cameroon
Authors: Ngomi C S T , Fadikpe A A A , Ngaba M J Y , Chen QP , Nfonbeu M F M , Yang JZ 
Published: November 2020

Abstract
Improving farmers’ welfare has been the concern of the government and international donors in sub-Saharan Africa and particularly in Cameroon. Encouraging farmers to adopt agricultural extension services is one of the most important measures implemented to improve the rural farmers’ welfare situation. Thus, the main aim of our study is to assess the impact of the adoption of agricultural extension services on the welfare (food security) of smallholder rural farmers in the Centre region of Cameroon. Our study employs the endogenous switching regression model to account for both selection and endogeneity bias on survey data obtained from two divisions in the Centre region of Cameroon. Using Household Dietary Diversity Score (HDDS) as a measure of our food security access indicator, results suggest that adoption of agricultural extension services significantly reduces the HDDS of farmers’ households by 0.267 points at 5 percent significance level. This result demonstrates that adopting agricultural extension services doesn’t improve the diversity of nutritional intake by rural farm households thereby suggesting the benefits obtained from income does not always lead to the consumption of diverse nutritional food. Given that food security has no standard measurement, extension services adoption could, however, improve other aspects of food security.