bluuebunny/crossref_metadata_2025_split huggingface dataset:
Rice husk-based biochar for carbon dioxide adsorption in biogas
Authors: Pertiwiningrum A , Besari R N , Wuri M A , Harto A W , Fitriyanto N A , Yanuari A A S 
Published: November 2020

Abstract
Rice husk-based biochar has been prepared by pyrolysis process for carbon dioxide adsorption in biogas. Biochar is considered as porous material for carbon dioxide adsorption. In this study, the adsorption of carbon dioxide, the largest impurity in biogas, was evaluated. The adsorptions were conducted in five treatments (mass variation): 80 grams of biochar (RB1), 60 grams of biochar and 20 grams of zeolite (RB2), 40 grams of biochar and 40 grams of zeolite (RB3), 20 grams of biochar and 60 grams of zeolite (RB4), 80 grams of zeolite (RB5). The best performance of carbon dioxide adsorption showed by RB1 with the decrease in carbon dioxide up to 31.59%. Characterization of adsorbents were also investigated by surface area analyzer to know relation between surface area and adsorption capability. It was found that the larger surface areas are favorable to adsorb carbon dioxide.
Dynamic simulation of a hybrid PV/Wind/Diesel system using power factory
Authors: Renaldhy Z R , Hutajulu A R , Husnayain F , Aryani D R , utomo A R 
Published: November 2020

Abstract
Economic growth is one factors driving the need for expansion of the electricity system. However, power systems in some isolated areas are found to be unreliable because of some issues such as the transportation of components of the power system and fuel. The potential of local renewable energies can be the alternative for the development of power plants in these areas. However, most renewable energy sources produce relatively unstable voltage and power due to fluctuating primary energy sources conditions. This study proposes a hybrid generation system that utilizes the potential of local RES such as a PV system and a wind turbine generator, combined with existing diesel generators and equipped with a battery energy storage system. Simulations are carried out to observe and study the dynamic response of each component in response to the system frequency using PowerFactory software. The result shows the proposed hybrid system still operate well and stably due to the dynamic performance and coordination control between diesel generators and the battery energy storage system.
Sensitivity analysis of using unreliable rain gauge stations for evaluating the accuracy of radar rainfall estimates
Authors: Hambali R , Legono D , Jayadi R 
Published: November 2020

Abstract
Providing reliable rainfall information through the integration of all possible data sources such as rain gauge and radar can make a valuable contribution to the development of the lahar flow warning system. However, the reliability of radar rainfall (R) data still needs to be evaluated based on ground rainfall (G) given the estimated value of radar rainfall depth is not so precise compared to ground rainfall. The selection of which ground rainfall data can be used as an evaluation reference is based on the assessment of the variance analysis. Through the Scheffe test, the unreliable rain gauge stations can be known. The use of unreliable rain gauge stations for evaluating the accuracy of radar rainfall estimates affecting the parameter values of radar rainfall and ground rainfall conformity. This paper discusses sensitivity analysis of using unreliable rain gauge stations for evaluating the accuracy of radar rainfall estimates. Based on the Scheffe test, several scenarios are set to assess the change of conformity parameter values. The conformity between radar rainfall and ground rainfall are evaluated by using Log (G/R), FSE, and RMSE index. A number of 10-minute rainfall intensity data during 2016-2018 from 21 automatic rain gauge and X-band MP radar stations in the Merapi volcano region are used in the analysis. The result show that the less unreliable rain gauge stations used to assess the radar rainfall accuracy, the better the conformity parameter values.
Application of artificial neural network with backpropagation algorithm for estimating leaf area
Authors: Asriani E , Robika  
Published: November 2020

Abstract
Leaf area plays an important rules in plant growth and production. There are some methods used to measure leaf area with different approach namely regression equation, grid count, gravimetric, planimeter, image processing, adaptive neural based fuzzy inference system, and other. In this research, the excellencies of Artificial Neural Network (ANN) with backpropagation algorithm will be inspected to estimate leaf area of seven plants species. Two parameter, leaf length and leaf width, used as an input variables and leaf area as output variable. The result indicated that ANN with 2-50-1 architecture has a good performance in predicting leaf area of seven plants species at 99.99% degree of accuracy.
Design of system for setting the temperature and monitoring bees in and out the hive
Authors: Supandi  , Arkan F , Gusa R F , Jumnahdi M , Kurniawan R 
Published: November 2020

Abstract
Trigona bee is one genus of bee without the sting producing honey and propolis. Activities in and out of the nest are activities to protect the nest from enemy attacks, remove dirt from the nest and most importantly forage. Foraging activities will affect the weight of the bee colony and its products, namely honey, bee pollen, and propolis. Temperature and humidity around the hive are important factors for trigona bees to move. This study aims to monitor temperature, humidity, light intensity, the volume of propolis, and the activity of bees in and out of the hive via a smartphone, to determine the effect of temperature, humidity, and light intensity on the activity of bees in and out of the hive. The average yield of bee activity in and out of the hive by controlling the temperature of the activity of bees in and out of the hive was 155 bees, a temperature of 29.64°C, and humidity of 89.15%. Nest temperature regulation has a significant effect on the activity of bees in and out of the hive. The activity of bees in and out of the hive is high in the morning around 07:00-10:00 at lower temperatures and higher humidity than the time of day or evening. The light intensity around the hive did not significantly affect the activity of bees in and out of the hive.
Economic feasibility analysis of Gintung Dam
Authors: Kalsum A U , Sutjiningsih D , Anggraheni E , Murniningsih S 
Published: November 2020

Abstract
Gintung Dam is a dam resulting from the post-disaster reconstruction and rehabilitation in 2009. In this study, economic feasibility analysis post reconstruction and rehabilitation is carried out. The feasibility analysis is reviewed based on economic value of the benefits of Gintung Dam and investment cost as well as Operational and Maintenance (O&M) costs. Economic valuation, which is an attempt to provide quantitative value to the goods and services produced by natural resources and the environment, is carried out for the benefits of dam. The method used is the investment criteria method which uses NPV, BCR, PBP, and IRR as parameters in determining the feasibility of project. Based on the results, for Gintung Dam with its function as a flood control was obtained NPV = Rp.14,023,230,130.29, BCR = 1.88, PBP = 27 years, and IRR = 12% and as groundwater conservation was obtained, NPV = Rp. 87,704,518,835.06, BCR = 6.51, PBP = 2.7 years, and IRR = 46.25%. The results of the analysis shows that the Gintung Dam reconstruction and rehabilitation project is economically feasible with the value results NPV > 0, BCR > 1, PBP < project life span (100 years), and IRR > interest rate used (10%).
Analysis of parking needs for sustainable parking lots in commercial area of Pangkalpinang City
Authors: Safitri R , Amelia R , Sujarwanto D 
Published: November 2020

Abstract
Pangkalpinang Plaza-Bangka Trade Center (BTC) Area is the largest commercial area in Pangkalpinang City. As the largest commercial area, this area causes a large pull of vehicle trips that needs a large number of parking spaces. Therefore, parking needs must be analyzed to provide sustainable parking lots in this area. This study aims to analyze parking needs for sustainable parking in Pangkalpinang Plaza-Bangka Trade Center (BTC) Area. In this research, the parking survey methods used are an inventory survey and a vehicle license plate survey. Parking needs analysis is reviewed based on parking volume and parking accumulation. Then, parking needs are determined based on the biggest interval between vehicle arrivals and departures from parking accumulation. The research finds that the amount of parking needs of on-street parking is 540 SRP for motorcycles and 120 SRP for passenger cars. Meanwhile, the amount of parking needs of off-street parking is 208 SRP for motorcycles in front of Ramayana and 238 SRP for motorcycles in basement Ramayana. Furthermore, these results will be useful for providing sustainable parking lots in Pangkalpinang Plaza – Bangka Trade Center (BTC) Area.
Kelubi Fruit (Eleiodoxa conferta) extract as a Green Catalyst Synthesis of 3,4-dihydropyrimidin-2 (1H)-ones
Authors: Mahardika R G , Sari R P , Nazrun  , Roanisca O , Abdussalam M 
Published: November 2020

Abstract
The use of synthetic strong acid catalysts or lewis acid catalysts from metals often causes environmental problems at the end of a chemical reaction. In this research offers an alternative solution using kelubi fruit extract (Eleiodoxa conferta) as a green catalyst, especially in the synthesis of 3,4-dihydropyrimidin-2 (1H)-ones derivatives which are reported to be active as therapeutic and bioorganic chemistry. So the purpose of this research was to develop a green catalyst from natural fruit for the synthesis of 3,4-dihydropyrimidin-2 (1H)-ones using kelubi fruit. The Green catalysts are obtained from water extracts of kelubi fruit that are ripe. Then the catalyst is added to the reagent for the synthesis of pyrimidine derivatives that consist of urea, benzaldehyde, and ethyl acetoacetate (equivalent). As a comparison, HCl is used as an acid catalyst. The result is the highest yield (67,7%) at the use of 0,2 ml green catalyst and reaction time 180 minutes. Spectrum UV-Vis of characteristics compound has a maximum wavelength of 306 nm.
Dynamic interaction between tidal current and upstream discharge at the Kapuas River mouth
Authors: Danial M M , Herawati H , Budiman F , Ramdani  
Published: November 2020

AbstractThis paper explores the dynamic interaction between tidal current and upstream discharge at the Kapuas River mouth. Long term time series data of tidal current and river discharge obtained from software Windwave 05 and hydrograph data, respectively. Three prominent parameters, i.e., river discharge, tides, and tidal current were analyzed using the wavelet method, Hilbert function, and low pass filter to evaluate the tidal characteristics and phase difference of M2, M4, K1, O1. The relationship between the tidal current and water level shows a mimic standing wave with the phase difference around ∼ -180 – 900, indicating the tidal current leads the water level. The low-pass filter results indicate that the increasing river discharge hampers the tides and reduces the tidal current at the mouth. The Hilbert function result reveals the asymmetric tide and flood dominant flow which has the opposite direction with the seaward direction of the current. Moreover, the subtidal water level flows in a seaward direction. This happened because the net seaward current modulated by the river discharge. The currents at the mouth are affected significantly by the swell wave.
The role of mangrove ecotourism towards the environmental sustainability in Bangka Regency
Authors: Hayati L , Bahtera N I 
Published: November 2020

Abstract
The exploitation of natural resources becomes an undeniable reality to fulfil the need and to improve economic growth. Excessive exploitation has threatened environmental sustainability. Creating ecotourism related to sustainability, education, economy and participative movement of society becomes solution to tackle the issue. The study aims to analyse the role of mangrove ecotourism towards environmental sustainability. Qualitative descriptive with interactive analyses was used as the method of the study. Observation and in-depth interviews were employed as the data collection technique. The study discovered that ecotourism mangrove played a vital role in ensuring environmental sustainability. It showed that tourism awareness groups built the tourist attraction by utilizing the 40 ha of mangrove forest. It implied that the livelihoods of society had altered from tin mining into the brackish water aquaculture. This had decreased the number of natural resource exploitation of tin mining
Local Wisdom of Jerieng Tribe in Utilizing Biological Resources
Authors: Afriyansyah B , Novalia  , Camelia A , Nukraheni Y N , Juairiah L , Ihsan M 
Published: November 2020

Abstract
Jerieng Tribe is one of the ethnic groups found in Bangka, precisely in Simpang Teritip District, West Bangka Regency. The Jerieng ethnic group is included in the Malay tribe of Bangka, in addition to the Lom ethnic group and the Sawang ethnic group on Belitung Island. Biodiversity of plants and animals has been widely utilized by the Jerieng Ethnics in fulfilling the needs of life, such as food, medicine, customs and cultural rituals. This study aims to examine the use and local knowledge of Jerieng Ethnics in utilizing and protecting biodiversity. The method used is Ethnodirect Sampling and Open-ended Interview. The Jerieng people have local wisdom in utilizing plant biological resources, such as traditional home and clothing, folk weapons, musical instruments, herbal medicine, and alternative food. For animal biological resources, such as the implementation of existing rituals, clothing. Traditional medicine and musical instruments. The utilization of biological resources must have a conservation strategy involving indigenous institutions, indigenous peoples, local Governments (Regents and village heads), and the central government (Ministry of Environment and Forestry). In conclusion, the Jerieng people kept their customary values and traditions and implemented a conservation strategy in the utilization of biological resources.
Managing social media in development program of sustainable region
Authors: Budiarto R , Novitasari D , Arif Z , Aliyah F , Salis F R 
Published: November 2020

Abstract
The Centre for Development of Sustainable Region (CDSR) is a collaborative centre of research and development led by Universitas Gadjah Mada. In its first phase of development, this centre comprises seven Indonesian universities and one US university. Two of three targeted outcomes of the CDSR are 1) strengthening institutional environment for research and management in involved higher education institutions and 2) development of sustainable archipelago region. During July 2017 – June 2020 CDSR has conducted more than a hundred activities. As a part of strategic tools in achieving the targets, CDSR systematically manages five social medias to share the news, research and activities using Facebook, Instagram, Twitter, YouTube and Website. This paper explains strategy to manage the social media platforms. Besides to share information and activities, social media is also managed as a tool to engage with people and institutions outside CDSR. During period started from February 2018 to June 2020 CDSR conducted intensive monitoring and evaluation on performance of CDSR information in the social media. The impression gained from Facebook, Twitter, Instagram, YouTube and Website are 90,387, 210,013, 45,454, 15,264 and 7,581 respectively. These impressions provide important information to evaluate continuous improvement in the program to develop sustainable archipelago region.
Nature-based solutions and similar concepts on water management
Authors: Woo H 
Published: November 2020

Abstract
Nature-based solutions (NbS’s) refer to the sustainable management and use of nature for tackling socio-environmental challenges such as, focusing on water issues, water security, flood protection, and water pollutions. This newly emerging concept is conceptually compared, in the aspect of water management, to existing similar solutions with different naming, all of which are based on ecosystem functions. NbS seems significant and meaningful both educationally and understandably, since that it can comprehensively cover and include the existing methodologies and solutions using the services of the natural ecosystem to socio-environmental challenges. However, it seems not entirely different from the broad-meaning of green infra, including Eco-DRR, in the aspect of approaching methodologies in water management. The conceptual and spatial hierarchy of each practice can be expressed in the narrowing order of NbS - (Ecological engineering) - BGI (Blue-green infra) - (CRT, Close-to-river techniques) - GI (Green infra) - LID (Low-impact development).
Correlation complexation constants of Ce4+ and F−
Authors: Jiang Ying , Wang Xuemei , Chen Yunzhu , Nengzi Lichao 
Published: November 2020

Abstract
Measured CeFn (n=1, 2, 3) complexation constant and solubility product constant of CeF4 and Na2CeF6 by ICP-AES and UV spectrophotometer, when Ce4+ and F− complexation reaction in water medium and nitric acid medium respectively, and the effects of Re3+and nitric acid concentration on Ce4+ and F− complexation reaction were studied. The experimental results show that the first-order complexation constant of Ce4+ and F− is CeF3
+=6.94*106, the second-order complexation constant is CeF2
2+=4.541*1011, and the third-order complexation constant is CeF3
+=6.232*1014. Compared with the complexation reaction of Ce4+ and F− in water medium and nitric acid medium, the complexation reaction of Ce4+ and F− in nitric acid medium is better. Re3+ appears, which affects the complexation reaction between Ce4+ and F−. When in nitric acid medium, the higher the concentration of nitric acid, the more unfavorable the complexation of Ce4+ and F−. The study of the relevant physical constants of Ce4+ and F− in this paper can be helpful for the separation of Ce4+ and F−, enrich the physical and chemical information of rare earth elements, and provide the basic theoretical basis for the rare earth fluoride that is difficult to be separated and recovered from the tailings, so as to reduce the harm to the soil environment.
Drought and flood characteristics evolution in peninsular region of Shandong Province based on standardized precipitation index
Authors: Zhao Weijun , Yan Tingting , Peng Shuzhen , Ding Min , Lai Xiaodan 
Published: November 2020

Abstract
Data research in recent decades shows that drought and flood disasters occur frequently in China due to the uneven spatial and temporal distribution of rainfall. Taking Shandong Peninsula as an example, this work selected the standard precipitation index (SPI) as the precipitation characteristic analysis index, calculated the SPI values at 4 different time scales in multiple meteorological stations from 1961 to 2013, and analysed the inter annual and seasonal variation characteristics of drought and flood. The results show that: (1) the standardized precipitation index can better reflect the characteristics of inter annual and seasonal drought and flood changes in the study area on a long time series scale. (2) The most flood period occurred in 1964 and 2007, and the most drought period occurred in 1981, 1991 and 1998, and all reached the severity of extreme drought. (3) The intensity of drought and flood varied in different time scales. In spring, autumn and winter, the drought intensity and affected area showed a decreasing trend. However, the flood intensity and its affected area were on the rise in summer, and the rainfall intensity was on the rise in time scale.
Measures, methods and cases of river ecological restoration
Authors: Zhang Xinmin , Zhang Xingliang , Zhang Zihao , Zhang Jingshen , Fan Pengyu 
Published: November 2020

Abstract
This work analyzed the main causes of river ecosystem degradation by summarizing the problems of river ecological environment. Second, it formulated measures and methods of river ecological restoration aiming at all kinds of ecological environment problems. In order to strengthen the pollution control and ecological environment protection, it then put forward management measures of administrative functional departments from the aspects of carrying out pipe network pollution interception, strengthening water law enforcement, pollution control of non-point sources of living and farmland, and river system control. In order to restore the degraded river ecosystem, the technical measures of ecological restoration in terms of water quantity, water quality, habitat and biodiversity were summarized. Finally, it clarified principles, steps and objectives of river ecosystem restoration, which has certain reference significance for the comprehensive and systematic restoration of river ecosystem.
Research on spatial resilience characteristics and response mechanism of Chengdu-Chongqing urban agglomeration based on power-law
Authors: Cao Qi , Shi Manjiang 
Published: November 2020

Abstract
Urban agglomeration is the spatial organization form of urban development and the main carrier of population, economy and information gathering to promote regional coordinated development. Therefore, it is important to research the sustainable development of urban agglomeration. Focus on the scientific issue of the relationship between power-law distribution structure of spatial elements and spatial resilience of urban agglomeration; using the number of urban permanent population and urban built-up area size as the key spatial elements of Chengdu-Chongqing urban agglomeration, firstly, we discussed the spatial-temporal evolution law of power-law characteristics of key spatial elements of Chengdu-Chongqing urban agglomeration. Secondly, we revealed the response mechanism of spatial resilience to power-law distribution of key spatial elements of Chengdu-Chongqing urban agglomeration. The conclusions as following: (1) The spatial resilience of Chengdu-Chongqing urban agglomeration characterized as “concentration” dominated by large cities. (2) The spatial resilience and Pareto distribution of Chengdu-Chongqing urban agglomeration have a remarkable and stable response relationship. (3) In order to maximize the spatial resilience of Chengdu-Chongqing urban agglomeration, it is urgent to control the number of urban permanent population and built-up area scale of large cities.