bluuebunny/crossref_metadata_2025 huggingface dataset:
Youth participation in the creative economy and community empowerment
Authors: Rachman A , Bulkis S , Hasbi
Published: May 2020

The development of creative economy in Indonesia is characterized by the participation of youth in the craft subsector, one of which is the city of Makassar, it can be reviewed based on the involvement of youth in the creative craft sector and also the series of creative economy activities both organized by the government and the private sector. This research aims to analyze the form of youth participation in the creative economy of craft subsector in Makassar City. This research used a descriptive qualitative approach, the data were obtained through interviews, observation and documentation. The Informants were determined purposively scattered in three sub-districts of Makassar: Manggala District, Biringkanaya District and Tamalanrea District. The techniques of data analysis were reduction, data display and verification / conclusion. The results of the research indicate that the form of youth participation in the creative economy of craft subsector in Makassar City involves: Planning Participation, youth participating in craft business planning, vision-mission design, recruitment or addition of human resources, product development and innovation , increased production, marketing management, financial statements, job desk distribution, and community empowerment. Implementation Participation, youth participation in carrying out creative business activities, running programs and business targets, initiate education and training services, be directly involved in creative economic activities, control the production and marketing processes, and conduct discussions in decision making. Utilization Participation , young people participate in utilizing the creative economy by developing creative business brands and products, expanding branding and business networks to maintain facilities and infrastructure, management evaluation and production activities, increasing individual insight, economic income and entrepreneurship experience, then community empowerment or social activities through creative economic activities.
The development strategy of coastal area potential based entrepreneurship skills education
Authors: Jaya A S A , Barkey R A , Zubair H
Published: May 2020

The entrepreneurship skill education program is a program of the non-formal education carried out by PKBM to provide knowledge, skills, and entrepreneurship attitudes for residents based on the potential resources and business field needs in the citizens. The research is aimed to (1) analyze the factors that are influencing the development of the entrepreneurship skill education program (2) formulate the development strategy of the coastal area potential based on the entrepreneurship skill education program. The research used the qualitative descriptive method, and it was conducted in four districts with the characteristics of the coastal area at North Luwu Regency namely: Malangke District, West Malangke District, Bone-Bone District, and Tana Lili District. Data were collected using the documentary, questionnaire, and in-depth interview. The data were analyzed using the descriptive, principal component, and SWOT analyses. The research results indicated that: (1) influencing significantly in the development of the entrepreneurship skill education program at North Luwu Regency are: (1) natural resource potential (2) business field needs (3) partnership cooperation (4) institutional assistance in business pioneering ( 5) skills-based curriculum development based on work and business needs; (6) education level (qualifications) and tutor competence (7) access (distance) to PKBM (8) motivation and mindset of learning citizens (9) permanent work of learning residents, and (10) health conditions of learning residents. The development strategies of the entrepreneurship skill education program are the aggressive strategies through; (1) the development policies of the entrepreneurship skill education program based on regional potential and business opportunities (2) the standardized skill-based curriculum compilation based on competence and commodity types (3) the accompaniment policies of the entrepreneurship skill education program (4) the cooperation development with related stakeholders to carry out the improvement of the tutors competence based on regional potential and business opportunities, and (5) the program partnership establishment between IKM/DUDI and PKBM institutions in an effort to ensure the labour availability and absorption.
Land value city of Makassar based on rent-bid curve
Authors: Rasyid A R , Ihsan  , Arifin M , Sari D T A , L M A , G L , Yanti S A
Published: May 2020

This study uses a library approach and field research. The library approach is carried out by reading theories related to land values from the literature study and used to obtain secondary data. Meanwhile, field research was carried out by observation to find out and document land use in the city of Makassar. The analytical method used is descriptive quantitative and qualitative to describe the land value of the distance between Makassar City and land use. Besides, spatial analysis is also used to interpret the land value of Makassar City based on the Bid-Rent Curve in the form of maps of distance and land use. Moreover, correlation analysis is used to determine the relationship between distance and land use to land value. The results of the study through the analysis stages above show the value of land in Makassar City is influenced by distance, where the closer to the city center the higher the land value and the farther from the city center, the lower the land value. Also, land use also affects the land value of Makassar City, wherein this study, the most critical land use is commercial land. This shows that there are conditions in accordance with the theory of Rent-Bid Curve.
The implementation of law number 6 the year 2014 concerning with villages in gender-responsive development planning in Uluere District, Bantaeng Regency
Authors: Iswandi S , Yunus R , Agussalim
Published: May 2020

The urgency of gender-responsive development planning in the implementation of village legislation is needed to facilitate the results of development that can be carried out by both men and women. This research aims to determine the efforts to increase gender mainstreaming in village development planning for the implementation of Number 6 the Year 2014 concerning Villages. This research was an evaluative descriptive study conducted in Uluere District, Bantaeng Regency. The method used was a sequential mixed method, including secondary data, i.e., the identification of data and the review of documentation relevant to the research and primary data, i.e. the data collected through focus group discussion and questionnaire with Likert Scale. The sample was selected purposively from six villages. The data were analyzed by transforming qualitative data into quantitative data using basic internal measurements. The results of the research indicate that the implementation of Law Number 6 Year 2014 concerning with Villages in gender-responsive development planning in Uluere District, Bantaeng Regency has not been fully integrated properly. This by gender-responsive indicators, which are still in the moderate category. The contents of the village RPJM documents do not fully represent the integration of gender issues. The representation of women in the village in village government organizational structure and village community organizations is still in low category. The availability of human resources that understand gender and mainstreaming and regulations/policies in the village level are still relatively moderate even though budget support has been in high category. In such a condition, full commitment from village government is needed in ensuring gender-responsive development planning in the village level through continuous and gradual capacity building, information dissemination, social media and innovative in developing a policy program in accordance with village authority at the local scale as well as building cooperation with various parties related to gender-responsive development planning
Youth participation in the informal sector in subsector Tamalanrea Indah, Makassar
Authors: Ashabulkahpi  , Munir A , Salam M
Published: May 2020

Indonesia is currently experiencing youth employment problems that are absorbed into the informal sector. This study aims to analyze the employment of youth in the informal sector. From the results of this study, it was found that young people who participated in the informal sector were motivated by the enthusiasm to try independently, be free, and not under pressure from others. Besides, the informal sector is also in demand by youth because the informal sector is very easy to enter and flexible. To start a business in the informal sector also does not require large capital so that in the informal sector, the use of capital from personal savings is becoming increasingly common. The informal sector, which has been categorized as a lower-class economic sector and the poor are now being cultivated and managed by a middle-to-high-educated middle class indicating a shift in the informal sector, where the informal sector is associated with poor and uneducated people or low education. The sector which was once filled with uneducated residents is currently filled with middle-to-high-educated residents as a result of the development of education, which is not balanced by the development of employment.
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

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

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

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

Sungkai 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

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

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

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

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

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

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

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

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

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

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

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

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

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.
The development of infrastructure and the level of poverty in the eastern part of Indonesia
Authors: Meilvidiri Wayrohi , Jafar Rizka , Asrudi  , Syahruddin  , Nahumury M A I , Akbar M
Published: May 2020

This research aimed to figure out the infrastructure effect on the poverty level in the Eastern Part of Indonesia. The developed research model applies an econometric approach i.e. simultaneous equation model using data panel of 16 provinces. The variables of the energy, housing, transportation, clean water, education, health, and telecommunication were used to measure the effects of the infrastructure whereas the growth and income inequality were used as the intervening variables. The result indicates that housing, clean water, and telecommunication have a negative and significant effect, while energy has a positive and significant effect on the poverty level. Indirectly, housing, clean water, education, and telecommunication variables have a negative and significant effect on the poverty level. In addition, energy and transportation have positive and significant effects on the poverty level. Another finding is improving economic growth in the Eastern Part of Indonesia causing more equal income distribution. However, it is not accompanied by poverty reduction.
Heat exchanger in process of making sagu sep as papua’s contextual science learning media
Authors: Supriyadi S , Palittin I D , Reski A , Fadlih A M , Rahayu Mitra , Abdullah N
Published: May 2020

This paper aimed to examine the indigenous culture of the Kanume tribe in the process of making Sagu sep as a medium for Papuan contextual science learning. This research was conducted in the Sota district of the Merauke Regency. The method used is descriptive qualitative research. The data collection technique is done through observation, literature study and in-depth interviews. The data obtained is then represented and interpreted in the concept of the heat exchanger. The results of the study show that there are scientific concepts that exist in the process of making Sagu sep and can be implemented in science learning.
Effect of ocean acidification and temperature on growth, survival, and shell performance of fluted giant clams (Tridacna squamosa)
Authors: Syazili A , Syafiuddin  , Niartiningsih A , Jompa J
Published: May 2020

This study aims to determine the effect of ocean acidification and temperature on growth, survival, and shell performance of fluted giant clam (Tridacna squamosa). Juvenile fluted giant clam put into an aquarium which is given a combination of CO2pressure treatment (415, 1000 and 1800 ppm) and temperature (30, 32, and 34°C). Measuring the length, width and height of the shell perform in every two weeks for five times. CaCO3content and shell strength was test at the end of the study. The best growth of shell length, shell width, and shell height in the treatment of CO2concentrations of 415 ppm and temperatures of 30°C were 23.28 mm, 11.51 mm and 0.69 mm respectively. Survival live also obtained in the treatment of CO2concentrations of 415 ppm and temperatures of 30°C and CO2concentrations of 415 ppm and temperatures of 32°C each of 100%. The strength of the shell and CaCO3content decreased in the treatment of CO2concentration and high temperatures. Higher concentration of CO2and increased temperature negatively affected the growth of length, width, survival of scales, reduced strength and the CaCO3content of shell.
Analysis of open spaces in flood-prone areas in small-medium cities: a Case study of Palangkaraya City
Authors: Permana I , Ludang Y
Published: May 2020

City open space is an open space within a city, commonly used for parks, green spaces, and other open areas. The landscape of the city’s open space can range from playing fields to highly maintained environments to relatively natural landscapes. In Palangkaraya city, there are many vacant open spaces located in flood-prone areas near a river stream. It has a significant function for the city environment, however, most of them are occupied illegally for settlements. Palangkaraya city is a small-medium city located in Central Kalimantan Province, Indonesia. The city is surrounded by forest 285,349.28 hectares while the size of the city itself is 168,000 hectares with a population of 376,647 people. According to Burgess, a small-medium city is a city with a population of more than 100,000 people but a little bit less than the minimum number of the population categorized as a medium city which is 500,000 people. The use of the vacant open spaces in flood-prone areas in such a small-medium city like Palangkaraya city is mainly for environmental function. This research will measure scientifically the use of the vacant open spaces in flood-prone areas for environmental function, hence city policy on the development of city open spaces can be formulated to increase benefits from the existence of city open spaces within a small-medium city.
Mode of Production and Sustainability of Torani Fishermen Household Livelihoods in Takalar District
Authors: Halik H A , Salman D , Darma R , Arief A A , Rahmadanih
Published: May 2020

A livelihood strategy is fundamental in the lives of residents, including torani fishermen as an effort to survive or improve their standard of living. The sustainability of the torani fishermen’s livelihood pattern is related to the social formation in the mode of production (production power and production relations) that takes place. This research aims to analyze the relationship between the mode of production with a livelihood strategy that is carried out for the sustainability of torani fishermen in Takalar district. This research develops a pospositivistic paradigm of descriptive research through a qualitative method using a case study design. Data was collected and analyzed according to the instructions of qualitative research through three stages of activities, namely 1). Data reduction 2). Data exposure and 3). Conclusion and verification. The results of the study indicate that the mode of production that takes place in the torani fishing community is the capitalist mode of production and the non-capitalist mode of production, where the capitalist mode of production dominates the non-capitalist mode of production. The two modes of production provide different income results and become the basis for making a choice of livelihood strategies. Some choices of livelihood strategies that have been carried out are survival strategies, consolidation strategies, accumulation strategies and diversification strategy
Effect of Cyclic Heat Treatment Process on the Localized Corrosion Resistance of 409 Ferritic, 430 Ferritic, 3163 Austenitic and 444 Ferritic Stainless Steels for High Temperature Applications
Authors: Loto Roland T.
Published: May 2020

The corrosion resistance of as-received 409 ferritic, 430 ferritic, 444 ferritic and 316 austenitic stainless steels was studied in 0.05M H2SO4/3.5% NaCl solution by potentiodynamic polarization and potentiostatic measurement and compared to their counterparts subjected to repetitive temperature variation at 1000°C. As-received 409 ferritic steel exhibited the highest corrosion rate at 8.406 mm/y compared to as-received 316 austenitic steel with the lowest corrosion rate at 3.130 mm/y. Corrosion rate of heat treated 409, 430 and 444 ferritic stainless steels significantly increased to 10.766 mm/y, 5.694 mm/y and 6.096mm/y while the corrosion rate of as-received 316 austenitic steel decreased to decreased to 0.409 mm/y. As-received 444 ferritic steel exhibited the weakest resistance to pitting corrosion while as-received 409 ferritic steel exhibited the most significant metastable pitting activity. Pitting corrosion susceptibility of heat treated 409 ferritic, 316 austenitic and 444 ferritic steel decreased significantly to 0.137 V, 0.384 V and 0.096 V while heat treated 430 ferritic steel exhibited significant improvement in pitting corrosion resistance.
Thermogravimetric Analysis and Pyrolysis Kinetics of Malaysian Wood Species
Authors: Ali Sulaiha , Hussain Siti Aslina , Mohd Tohir Mohd. Zahirasri , Nuruddin Ahmad Ainuddin
Published: May 2020

The mass loss of three wood species in Malaysia, Shorea laevis, Koompassia malaccensis, and Shorea parvifolia were measured against time and temperature at three different heating rates (5, 10 and 20 °C/min) in nitrogen environment, through thermogravimetry analysis (TGA) technique. This measurement revealed that the decomposition of these wood generally occurred in three stages, the dehydration stage, the active stage, and; the passive stage. The maximum decomposition peak in derivative thermogravimetric (DTG) analysis curve shifted towards higher temperature range with the expedition in heating rate. The kinetic decomposition parameters of the timbers were determined by adopting thermal kinetic method of Coats and Redfern. Principally, the density and moisture content of timber does not influence the kinetic parameters studied in this work. Overall, the thermal decomposition in the second-stage (active stage) was dominated by the hemicellulose and cellulose while the decomposition of lignin was apparent in the third-stage (passive stage) of pyrolysis. The higher activation energy in the second-stage indicates that more cellulose is contained in the sample. The activation energy of lignin is observed to be much lesser compared to the activation energy of the hemicellulose and cellulose for two species tested except for the Shorea parvifolia.
A Method of Selection the Textile Materials for Virtual Reconstruction
Authors: Zhang S C , Kuzmichev V E
Published: May 2020

A reconstruction of historical costume can be applied to the movies, theatres, and online museums. Additionally, in the contemporary fashion and industry, the historical European costume has been one of the most essential inspiration for new design. This article developed a method of selection the analogues of textile materials which have been used in European men’s suits from 1850s to the 1920s based on published books and real historical male coat. This investigation will be useful to reconstruct historical men costume in virtual reality with high-precision.
Silica Aerogel Thermal Insulation Coating as Commodity Usage
Authors: Sanpo Noppakun , Jitputti Jaturong , Prakulpawong Peeranut , Srikamut Chadapon , Yodyingyong Supan , Triampo Darapond
Published: May 2020

Silica aerogel-based thermal insulation coating (SA-coating) was prepared from a commercial acrylic binder. The purpose of this investigation is to determine the effectiveness of SA-coating with the application in energy-efficient home design for temperature insulation purposes. The weather acceleration test and thermal insulation property of SA-coating were investigated and compared to the original commercial binder. The weather acceleration test of SA-coating showed equivalent weathering stability and robustness compared to the original binder. The thermal insulation property was performed from an in-lab setup, called temperature difference (TD) measurement. In a closed chamber, without air circulation, the surface temperature with SA-coating was reduced by as much as 26 degrees from 90°C to ∼64°C. More so, if TD measurement was performed in a ventilated area, the temperature can be reduced from 50°C to 36°C (room temperature was 31 °C). The thermal conductivity of the coating at different temperatures was also measured. The water contact angle measurements and the scanning electron micrographs showed that SA-coating can be made hydrophilic to hydrophobic by simple abrasion.
Copper-Zinc Oxide Synergistic Approach as Low-Emissivity Material for Energy-Saving Windows
Authors: Termkleebbuppa Sireethorn , Yodyingyong Supan , Leelawattanachai Jeerapond , Triampo Wannapong , Sanpo Noppakun , Jitputti Jaturong , Triampo Darapond
Published: May 2020

In luxurious glass buildings and constructions, heat gain (or heat loss) mostly comes through the windows. Infrared (IR) radiation is an important factor that causes the entry of heat into the buildings. To save energy consumption of air conditioners, low-emissivity (Low-E) glass coating applications are focused. In the energy-saving field, transparent conductive oxide (TCOs) are used as coatings to minimized IR entry. In this work, copper-doped zinc oxide (CZO) is synthesized for thermal reflective material. Cu(II) ions are doped to ZnO by a sol-gel method to obtain CZO nanoparticles and is coated on a glass substrate. The morphology of CZO is investigated with scanning electron microscopy (SEM); phase crystallinity is determined by X-ray diffraction (XRD); and UV-Vis-NIR spectroscopy is used to characterize UV/IR-shielding and also the optical transparency. IR cameras and in-lab thermal insulation setup are used to test the heat insulation properties. The result shows that 15% copper-doped zinc oxide has the best insulation from IR rays with the lowest temperature in the interior (T3) of 50.6°C while the outer temperature (T2) was at 85.5°C the lowering of the temperature by 34.9°C (cooler by 59%). CZO synthesized from the sol-gel method has promising properties for Low-E glass coating applications.
Damage Mode of Long Tube Structure at Different Water Depths under Strong Impact
Authors: Teng Xiaoyan , Sun Yuxin , Wang Zhikai , Shi Dongyan , Tian Xuanxin
Published: May 2020

In order to study the damage mode of the structure under strong impact, the finite element analysis software ABAQUS acoustic-coupling method is used to calculate and analyze the strong impact of the long tube structure under different water depths and different impact factors. The study obtained damage patterns influenced by impact factors and water depth conditions. It provides a reference for the calculation and impact design of underwater structures under strong impact.
The Study on Effect of Lightweight Concrete Block by Water Hyacinth Adding
Authors: Subpa-Asa Prang , Laokongthavorn Laemthong , Date Shigeyuki
Published: May 2020

The objective of this study is to examine the pattern of water hyacinths which is a plant that is suitable for making lightweight concrete and can be used to replace sand in lightweight concrete production. The proportion of cement: sand: water: foam is 1: 1: 0.65: 44.08 and the proportion of water hyacinths that will replace the sand by the cement’s weight is 0%, 2.5%, 5%, 7.5% and 10%. The density, water absorption, compressive strength (by the standard of TIS 1505-2541) and heat conduction of the lightweight concrete at 14 days will be studied. The results of the compressive strength of the lightweight concrete (LC) and the cellular lightweight concrete (CLC) are 167.56 ksc and 284.94 ksc, respectively. Both the compressive strength of the cellular lightweight concrete mixed water hyacinth (CLCH) and the lightweight concrete mixed water hyacinth (LCH) were investigated. The compressive strength of the CLCH and the LCH are 156.37 ksc and 172.45 ksc, respectively. The results are that the percentage loss of the CLC and the LC compressive strength are 6.68% and 39.83%. As for the physical properties, which are density and thermal conductivity, decreased. In contrast, water absorption increased by the percentage of water hyacinth by sand replacement. The optimal water hyacinth ratio in this study is 5%. Moreover, the CLC block is specified by the Thai Industrial Standards Institute 1505-2541 and is classified as C16 of the CLC block.