bluuebunny/crossref_metadata_2025_split huggingface dataset:
Land aspects of environmental aspects in using space in Kotamobagu city, North Sulawesi province
Authors: Bagaya D I , Barkey R A , Solle M S 
Published: May 2020

Abstract
The land is an important resource for human survival. Its utilization must be following the capacity of the environment, the resources owned and the ability of the land, or the other words according to the carrying capacity of the environment. This study aims to determine the conditions of actual land use and investigate the class of land capacity in Kotamobagu City of North Sulawesi Province, so the suitability between the class of land capacity and the plan of actual land use and the plan of land use of RTRW can be known, determine whether the environmental carrying capacity is already overcapacity or not, and arrange the land use directive based on the carrying capacity of the land resources environment in Kotamobagu City of North Sulawesi Province. The research method uses a combination of qualitative methods and quantitative methods. The results of the research indicate that the actual use in Kotamobagu City of North Sulawesi Province, in general, 20.38% of the total area is built up, and the rest has not been built. The class of land capacity in Kotamobagu City consist of Class II (75.93%), Class III (11.57%), Class IV (5.33%), Class VI (5.7%), Class VII (0, 59%), and Class VIII (0.91%). The suitability between the class of land capacity and the actual land use is 90.13%. The suitability between the class of land capacity and the plan of land development of RTRW is 95.85%. The status of the environmental carrying capacity of land resources in Kotamobagu City at present is not exceeded since the amount of land availability is still greater than the land needs. Thus, it is recommended that the land use direction be divided into three functions namely, protected area, cultivated area, and limited cultivated area.
Potential of palm fatty acid distillate as a feedstock in the synthesis of ethyl esters using solid SO4
2-/TiO2-SiO2 catalysts
Authors: Manga J , Ahmad A , Taba P , Firdaus  
Published: May 2020

Abstract
Utilization of by-products from the cooking oil industry, such as palm oil fatty acid distillates (PFAD) can reduce the cost of producing ethyl ester/biodiesel. This PFAD is processed into biodiesel using SO4
2
−/TiO2-SiO2 solid catalyst and ethanol reagent. The central composite design in Response Surface Methodology is applied in optimizing the effect of process variables such as the amount of catalyst, ethanol to PFAD molar ratio and reaction time. The results of the study show that the best-operating conditions with 98.89% ethyl ester conversion were achieved with the catalyst amount of 5% w, a molar ratio of 13 in reaction time of 2.25 hours. The presence of SO4
2
−/TiO2-SiO2 catalyst components can be characterized using SEM-EDX. A functional group showing the presence of ethyl ester in biodiesel products has been identified using FTIR. Ethyl ester properties related to biodiesel properties can be shown as saponification value: 583.8446 mg/g, iodine value: 8.8714 mg/g and cetane value: 49-54.
Voltage stability assessment of the Southern Sulawesi power system in Indonesia for 2020 by using modal analysis
Authors: Nappu M B , Arief A , Alam N , Zulfachri M 
Published: May 2020

Abstract
This paper presents the voltage stability analysis assessment of the Southern Sulawesi power system in Indonesia for the year 2020, considering the load increase every year, the addition of new power plants as well as the large additional load of smelter industries in the Bantaeng Regency. The voltage stability method used in this paper is the modal analysis method. Modal analysis method uses the Jacobian reduction matrix resulting from the Newton-Raphson power flow analysis. Modal analysis produces eigenvalues for each load bus in the system. The bus with the smallest eigenvalue becomes the focus in determining the stability of the system. Then bus participation factor is determined to obtain the most influential bus to improve the stability. The results of this study confirm that by 2020, the Southern Sulawesi power system will be in a stable condition, with the smallest eigenvalue of 5.8 in bus Pare-Pare while bus Barru has the highest bus participation factor.
Characteristics and performance of charcoal briquette from the sawdust of Sungkai (Peronema canescens jack)
Authors: Nugroho A , Padil  , Udiantoro  , Istikowati W T 
Published: May 2020

AbstractSungkai wood (Peronema canescensJack) is one of the prominent materials used for the production of furniture and other decorative elements in Kalimantan and Sumatra due to its beautiful fiber and colour, and also fairly smooth texture. Since massive production, the waste resulted from the processing of sungkai wood is very abundant. The utilization of sawdust or wood shavings of sungkai still generates a relatively low value. In order to increase the value of sawdust of sungkai, this research was aimed to identify the characteristics and performance of bio-briquette produced from the sawdust of sungkai. This research was performed by evaluating the characteristics and performance of bio-briquettes produced from three concentrations (10%, 15%, and 20%) of glue material made from tapioca starch. The results show that, except for the volatile matter, all parameters of the characteristics and performance of the tested briquettes comply with the Indonesian National Standard (SNI) of briquette products. The characteristics and performance of the tested briquettes at the lowest levels are follows: water content (4.52%; SNI: max 8%), ash content (4.36%; SNI: max: 8%), volatile matter (42%; SNI max: 15%), density (0.46 g/cm3; SNI: 0.45-0.85 g/cm3), combustion time (0.14 g/min), ignition time (2.5 second/g), and calorific value (5.889 kcal/kg; SNI: min 5000 kcal/kg). It requires the optimization of the carbonization process in order to reduce the volatile matter.
Waste power plant based on methane gas at Tamangapa Landfill Makassar: a potential study
Authors: Yusran  , Misbahuddin A F , Akil Y S 
Published: May 2020

Abstract
Tamangapa landfill is main landfill in Makassar city. Some of significant problems arise from the Tamangapa landfil. One of them is environmental pollution caused by waste production. On the other side, the methane gas produced by organic waste can be used for electrical generation via waste power plant. This research examined the potential of methane gas production. It also studied the potential of electrical power generation based on sanitary landfill model. The prediction of waste amount had been done using linear regression method with SPSS software. Based on calculation, the cumulative methane gas production is 134,889.96 m3 in 2029. The cumulative electrical energy and power that can be generated are 1,065.63 GWh and 121.647 MW, respectively.
Initial prototype of power plant based on river currents prime mover: design and testing
Authors: Yusran  , Fatahuddin I , Yohannes C 
Published: May 2020

Abstract
The river currents is one of renewable energy types. It can be utilized for electrical generation. This study discusses about design and testing of initial prototype of power plants based on river currents prime mover. The working principle of this prototype is to convert kinetic energy from water current into electrical energy. The prototype testing were carried out at several variations of river currents velocity: 0.6, 0.8, 0.9, 1.2 and 1.3 m/s. The testing at 1.3 m/s velocity produced 1300 rpm of generator rotational speed, 0.22 A of electrical current, 5.2 V of electrical output voltage and 1.14 Watt of electrical power output.
Beneficiation of canary shell as a mixture of coal briquette
Authors: Asmiani N , Nawir A , Jafar N , Rinaldi A J , Widodo S 
Published: May 2020

Abstract
Now days, renewable energy is always being the interest thing to be studied, one of the examples of friendly environment renewable energy is briquette. In this study canary shell and coal were being the main materials for briquetting that would be made because canary shell assessed has high calorific value and not much cultivated and suitable to combine with coal to increase the calorific value, thus the beneficiation of canary shell as a mixture of coal briquette is being the purpose of this study. Research methods of this study were coal and canary shell carbonation grinded being the size 28 mesh, 65 mesh and 80 mesh, then conducted briquetting process with the starch and water as glue with the composition 125 gr: 25 gr: 50 ml and every size consist of four kinds of briquettes that are 100% canary shell, 100% coal, 50% canary: 50% coal and 75% canary: 25% coal. Those samples were analyzed the proximate contents, sulfur content and calorific value to find their quality. The result of this study shows that on proximate analysis, the concentrations of moisture, ash, volatile matter and fixed carbon of briquettes are varies greatly while on total sulfur analysis, the highest concentrations are dominated by 100% coal and the lowest are 100% canary in all sizes. Meanwhile on the calorific analysis, the briquettes with the size 65 mesh in all compositions are having higher concentrations than size 28 and 80 mesh which is from four kinds of those briquettes, the highest calorific value is 100% canary with a concentration is 6354 cal/gr and the lowest is 100% coal with a concentration is 5539 cal/gr) while for the mixing of canary and coal 50:50% is 6020 cal/gr and 75:25% is 6096 cal/gr.
Analysis of induced voltage impacts of the Southern Sulawesi power system with integration of industrial load and wind power plant
Authors: Widyaningsih D , Nappu M B , Arief A 
Published: May 2020

Abstract
Lightning strikes are one of the main causes of power outages that can result in dangerous conditions because of the high lightning strike current that may damage the electrical equipment. This study investigated the transient voltage of the Southern Sulawesi electricity system by considering the integration of 150 kV substations of Sengkang LNG and one wind power plant. Because of the integration plan, therefore it is necessary to analyse the impact of lightning strikes since it changes the network’s structure. This research will simulate lightning strikes by modelling and analysing fluctuations during interference.
Application of Error Correction Model (ECM) in stabilizing financial inclusion
Authors: Anwar A I , Kurniaty  , Wulandari N R S , Fitrianti R 
Published: May 2020

Abstract
The study aims to analyze the effect of financial inclusion and macroeconomic indicators on financial system stability in Indonesia. The study uses secondary data obtained from Bank Indonesia, World Bank, International Monetary Fund (IMF) and other sources. The data used is a quarterly time series data from 2007Q1 to 2017Q4 in Indonesia. The method of data analysis is done by building an index to obtain the value of the index, a descriptive analysis of the movement of the index to describe the condition of Indonesia’s financial system stability during the evaluation period based the index value obtained. Econometric validation of index by analyzing the effect of financial inclusion and macroeconomicindicators on the stability of the Indonesia’s financial system using Error Correction Model (ECM). The movement of the index is fluctuating shows that in general financial system stability in Indonesia during the observation period is in the corridor of unstable conditions. The results show that financial inclusion in the short term does not affect financial system stability, but in the long run has a significant influence. GDP, IHSG and nominal exchange rate has a positive and significant influence in creating good financial system stability. The growth of the money supply (M2) has a negative and significant influence on the stability of the Indonesian financial system.
Experimental study on stability of (ac-bc) made with asbuton modification (retona)
Authors: Omer M T A , Tjaronge M W , Passra M 
Published: May 2020

Abstract
Using of asbuton modification asphalt is another alternative to increase mixing quality. Usually, asphalt the aim of asbuton modification to decrease asphalt penetration. For that, it is needed to see the benefit of using asbuton modification as the natural asphalt. In this research mix using 5 asphalt content variation that was 4.5%, 5%, 5.5%, 6%, 6.5%. 15 specimens made using asphalt penetration 60/80 with each asphalt content three specimen. Using asbuton modification (Retona) asphalt mix which was Marshall characteristic to determine the optimum asphalt content, VMA, VFA, VIM, stability, flow and Marshall Quotient. The experiment for optimum asphalt content result of asbuton modification (Retona) asphalts it was 5.5% the test result value in accordance with specifications of the effective asphalt content determination by the Department of Public Works 2006. According to optimum asphalt content for asbuton modification (Retona) asphalt obtained stability 2251.01kg, for the result above it can be stated that asbuton modification asphalt retona mix it can use to develop the quality of pavement course and increasing the stability of the asphalt that used in road pavement.
Greenway model as a support of Makassar smart city
Authors: Cahyani  , Hamzah B , Syarif E 
Published: May 2020

Abstract
The problems that occur in Makassar City explain that the existing open green space does not meet the standards of the Ministry of Public Works PUPR, manipulated for urban scale, the proportion of green open space is 30% while Makassar City only has green open space of 13%. One of which is part of the green space is the greenway. The purpose of this study is to determine how the greenway model to support Makassar City as a Smart City. This research method uses quantitative methods proposed in the greenway model where data is collected by questionnaire and processed by statistical analysis techniques. The data is quoted using statistical analysis, namely Structural Equational Modeling or abbreviated SEM. The results of this study indicate that the Model Greenway as a support of Makassar Smart City has an elongated pattern to follow along the road, diverse vegetation, shady and neatly arranged, as well as land cover that is able to connect the air, maximize the aesthetics and constraints of roads and buildings, the availability of waiting places and bicycle paths and pedestrians, being a link to a larger, more comfortable and pleasant green space, the availability of street furniture and disability-friendly facilities, having good drainage channels and a well-organized electricity network, and providing road and pedestrian connections so as to provide security for pedestrians. This research can be made as a consideration in the planning and design of Makassar City to meet the needs of green space that can support Makassar City as a Smart City in terms of a Smart Environment.
Remediation of mine acid water using mangrove sediment
Authors: Tandiarrang J , Mustari K , Nafie N L 
Published: May 2020

Abstract
The handling of acid mine drainage has so far been carried out chemically and physically so it is inefficient because it can cause new pollutants. Therefore, biologically, AAT countermeasures can use bioremediation techniques by utilizing sulfate-reducing bacteria (BPS) which are abundant naturally in sediments. This study aims to analyze the ability of sediments of mangroves in neutralists acid mine water, for analyze the optimum pH resulting from the sediments of mangroves in the neutralization of acid mine water, for analyze how reduced levels of sulfates, heavy metals mangan and iron produced, for analyze the type of mangrove sediments of the most good in the neutralization of acid mine drainage. Acid mine water samples were taken at PT. Walanae Sand, Lamuru Bone, mangrove sediments taken in the mangrove tourism area of Tongke-Tongke Sinjai. This type of research is an analysis using descriptive methods in the form of field data collection, sampling in the field and testing in the laboratory. The results showed that mangrove sediments are able to increase pH and reduce sulfate levels, can increase the pH value from 2.24 to 7.02, the optimum pH can be achieved by using sand mangrove sediments that are 7.02 on day 10. Reducing sulfate levels from 1,171 ppm to 0.625 ppm with using sand mangrove sediments on the 10th day, but can not reduce the content of manganese (Mn) and iron (Fe) by using sand or mud mangrove sediments because the metal content in these sediments is higher than acid mine water. The best mangrove sediments in the neutralization of acid mine drainage are sand sediments because the time needed is faster in neutralizing the pH and reducing sulfate levels.
Strength performance of sodium hydroxide-activated fly ash, rice straw ash, and laterite soil geopolymer mortar
Authors: Rangan P R , Irmawaty R , Amiruddin A A , Bakri B 
Published: May 2020

Abstract
The geopolymer of fly ash (FA), rice straw ash (RSA) and laterite soil (LS) was prepared. The strength of the geopolymer mortar with the FA/RSA/LS percentage ratio of 41.67/16.67/41.67 was tested. The geopolymer was activated with sodium hydroxide (NaOH). Effect on air curing on compressive strength as well as the optimum mix proportion of geopolymer mortar was investigated. It is possible to achieve compressive strengths of 1.64 N/mm2, 1.72 N/mm2, and 3.22 N/mm2, respectively for the 12 M sodium hydroxide-activated geopolymer mortar after 3, 7 and 28 days of casting when air cured. Results indicated that the increase in the curing period increased the compressive strength.
Removal of brilliant scarlet by MCM-48 materials
Authors: Taba P , Shintadewi N , Zakir M , Budi P 
Published: May 2020

Abstract
Wastewater resulted from textile dyeing is an enormous pollutant around the world. Therefore, the existence of dyes, such as brilliant scarlet (BS), in the water environment, has to be removed. Mesoporous silica (MCM-48) was used to remove BS through the adsorption process. MCM-48 was hydrothermally prepared using co-surfactant of CTAB and Triton X-100 as a template. After being synthesized, the material was washed once and twice with HCl-ethanol to remove surfactants used. Fourier Transform Infra-Red (FT-IR) and X-ray Diffraction (XRD) were methods utilized to characterize MCM-48 materials. We studied the ability of washed MCM-48 materials (washed once, MCM-48-W1 and washed twice, MCM-48-W2) to remove BS from aqueous media with a variation of contact time, pH, and concentration. A UV-Vis Spectrophotometer was an instrument used for measuring the concentration of BS after adsorption at a wavelength of 505 nm. The adsorption isotherms of BS by washed MCM-48 materials were studied using Langmuir and Freundlich models. The result showed that the optimum time of BS by MCM-48-W1 and MCM-48-W2 was 60 min. The optimum pH adsorption of the dye by MCM-48-W1 was 6, whereas those by MCM-48-W2 was 5. The adsorption of BS by MCM-48-W1 and MCM-48-W2 obeyed the Langmuir and Freundlich models. The adsorption capacity of the former was higher than that of the later. This result showed that mesoporous materials that still had some surfactants are promising to be used as adsorbent of dye.
Comparative of the application of combine harvester with the traditional harvest at Tanah Miring District, Merauke Regency
Authors: Yasin  , Darmal R , Nixiatenriawaru A 
Published: May 2020

Abstract
Harvesting rice conventionally is generally done using traditional tools. Many obstacles on harvesting using traditional tools such as fecal contamination, reduced the harvest. This research aimed to analyze the use difference between the Combined Harvester-CH and sickles, either from the cost side or labors and efficiency. The research was a case study of the paddy farmers who used CH with ten informants consisting of the chairman of farmer union, agricultural extension agent, operator of Combined Harvester, and farmers. The research results indicated that the use of Combine Harvester provided additional rice production of 275 kg rice/ha and an additional income of Rp.3,570,000. The efficiency level of rice harvest using human power was 5.27 kg rice/ha, while the efficiency of CH rice was 11,29. The CH machines were suitable to operate on tidal land and in brackish water. Harvester traditionally needed high waged workers, while some workers were no interested in working in the fields. Cultivating farmers preferred to use CH machines on their paddy farming. Meanwhile, the formers worked as the waged laborers in order to supplement their family income. The cost of the harvest using Ch machine was Rp. 1,800,000/ha while the cost of the conventional harvesting was 4,000, 000/h. However, the presence combine harvester machine could not take the position of the workers as paid workers or the labor power in the agriculture sector.
Experimental study of rubber particles from recycle tires as concrete aggregates
Authors: Irmawaty R , Parung H , Md Noor N 
Published: May 2020

Abstract
The Waste tire is one of the largest waste contributors. Due to the abundant amount of waste tires that would require the proper way to utilize waste tires as an aggregate replacement in concrete. Crumb rubber is a fiber-shaped material, which is produced from shred or scrap of post-used tires from trucks. Tire Chips is a material that consists of small pieces of waste rubber tires. This study explores the ameliorative effects of rubber particles on some properties of concrete. The objectives of this work is to present the mechanical properties of concrete (compressive strength, modulus of elasticity and split tensile strength) with variations of crumb rubber + tire chips 0%, 10%, 20% and 30% on fine and coarse aggregate volumes. Two types of rubber particles (crumb rubber and tire chips) have been used in the rubberized concrete mixtures replacing partially natural aggregates. Cylinder-shaped test object with 100 mm in diameter and 200 mm in length. Compressive strength testing was conducted at 3, 14 and 28 days. While the modulus of elasticity and split tensile strength were tested at 28 days. The results showed that the weight of the concrete volume decreased by 3.5% in each addition of 10% crumb rubber + tire chips. Compressive strength and split tensile strength decreased with increasing the number of crumb rubber + tire chips in concrete. The decrease in compressive strength was 24% on the addition of up to 10% crumb rubber + tire chips, while the split tensile strength decreased by 16%. Adding more than 10% of crumb rubber + tire chips to fine and coarse aggregate volumes is not recommended.
Study of the relationship of asphalt modulus to the height of the laboratory LWD
Authors: Azis A , Parung H , Amiruddin A A 
Published: May 2020

Abstract
In the construction of the transportation network, road infrastructure is being developed intensively. Quality assurance is needed to prevent failure and ensure long performance. To measure the quality of road works, especially asphalt, can now use the laboratory version of the Lightweight deflectometer (LWD) tool developed by DGH. Lightweight deflectometer (LWD); which has been developed for evaluation of surface stiffness can be used to estimate the degree of compaction and produce modulus of elasticity. This a laboratory-based study aims to analyze the effect of asphalt mixture density (AC-WC) on deflection values and modulus of elasticity using laboratory version of the LWD and find the correlation between the modulus of elasticity of asphalt against variations in the height of the mashing load.