bluuebunny/crossref_metadata_2025_split huggingface dataset:
Transformation of function, form, zoning, circulation and material of Rumoh Aceh “Study of Aceh traditional architecture in Montasik sub-district, Aceh Besar”
Authors: Azzahra F , Sahriyadi  
Published: May 2020

Abstract
Along with the time running, traditional architecture starts to be limited by time. While traditional architecture is a self-identity of a region. The location of research is Province of Aceh, namely in Sub-district of Montasik, District of Aceh Besar. The objects of study are traditional house buildings called as Rumoh Aceh. Because, principally, all buildings have similarity; thus, samples were taken randomly from each village. The formulation of questions is to identify transformation of function, form, zoning, circulation and materials of Rumoh Aceh found in the Sub-district of Montasik. The objectives of this study are to understand transformation occurring in Rumoh Aceh in the Sub-district of Montasik over time in order to know causal factors; moreover, it is expected to be reference to the Rumoh Aceh itself. This study used descriptive-qualitative method to adopt phenomena directly (what, who, and where the research location is). This method can interpret and associate data, important situation, attitude, point of view, conflict, and others. Because this study is direct, the techniques of observation and survey (primary data) keep to be choice, such as, interview and documentation. Relevant references to data can be analyzed and developed (secondary data). The results of study indicate that Rumoh Aceh found in Sub-district of Montasik, in terms of functional transformation, is still ideal, but there are changes in function in lower parts of building, that previously functioned as animal breeding area, rice storage and rest area, now it changes into permanent space functioning as room, storage area, bathroom, and cloth drying area. Moreover, we seldom find terrace and gate areas in front of building. While form transformation in Rumoh Aceh tend to be unchanged. Rectangular and triangular form keep to be choice. Transformation of zoning and circulation only occur in lower parts of building because there are additional rooms and functional change of rooms so that automatically circulation system also changes according to needs. Along with time running, transformations of building materials are found in roofs. Before, Rumoh Aceh used local materials, such as, rumbiah leaf plait; now, iron sheets dominate the Rumoh Aceh. Moreover, use of brick materials is widely found in lower parts of building. Current materials, such as, plywood and acrylic, are found in nearly each Rumoh Aceh, especially in door and window blades.
Preparation of suppressor column for capillary ion chromatography with conductivity detection
Authors: Rahayu A , Fajri J A , Lim L W , Takeuchi T 
Published: May 2020

Abstract
A capillary suppressor column was prepared by packed column and monolith columns. The packed column prepared using HyperSep SCX as packing material. The sulfonate group was introduced from benzenesulfunic acid that could be used as a suppressor material. The slurry of packing material was packed to capillary fused silica 0.53 mm I.D x 0.66 mm O.D with 30 mm of length. Monolith suppressor column was prepared from methacrylate based modified with Na2SO3 for strong cation exchanger and iminodiacetic acid for weak cation exchanger. A suppressor column was connected to a capillary chromatography system for separating 5 inorganic anions (Cl−, NO2
−, Br−, NO3
− and SO4
2-) using conductivity detection. The suppression system could reduce the background conductivity of the mobile phase sodium bicarbonate and sodium carbonate properly up to 67.72% using packed suppressor column with size 0.53 mm I.D x 0.66 mm O.D with 30 mm length. It column could be used about 1.5 hours before breakthrough.
Biomass Gasification of Sengon Sawdust to Produce Gas Fuel
Authors: Maryudi  , Aktawan A , Sunardi  , Indarsi K , Handayani E S 
Published: May 2020

Abstract
Indonesia is a country with extensive agricultural and plantation areas that produce abundant biomass, some of which are rice husks, coconut shells, corn cobs, and wood waste. Wood waste itself has a very large number of species, for example, Sengon sawdust, Teakwood, Mahogany wood, Lamtoro wood and so on. Sengon wood is usually used as material for craftsmen and furniture, but with advanced technology, it can be done using sengon sawdust to produce syngas with the gasification process. The gasification process uses a gasifier tool. In this study, an independent variable was used in the form of sengon sawdust. While the dependent variable that will be obtained is in the form of syngas output, gasification temperature and time needed to produce syngas. The results showed that the more bait sengon sawdust, the more syngas was produced and the longer the time needed. Based on syngas analysis, CO results were obtained 17.235%; CH4 3.446%; H2 5.089%. It can be concluded that sengon wood powder waste is one of the biomass that can be used as a gasification raw material to meet energy needs.
Biodiesel from microalgae Nannochloropsis oculata and Tetraselmis chuii by sonication technique and K2CO3 catalyst
Authors: Purnama H , Harland  , Hidayati N 
Published: May 2020

Abstract
The way out of the energy crisis is to divert national energy needs with the use of new and renewable energy. Bioenergy such as biodiesel is the expected one of those. Algae which has the potential to be used as raw material for making biodiesel is microalgae because it is easier in its cultivation. The microalgae used in this study were Nannochloropsis oculata and Tetraselmis chuii. Microalgae that have been harvested in the pasta form are extracted to obtain the oil then processed into biodiesel with an ultrasonic device. The transesterification reaction ran at 65oC with a 1% K2CO3 catalyst. The variables applied were the ratio of oil: methanol (1:5; 1:10; 1:15) and reaction time (1 and 3 hours). The biodiesel produced was then tested for acid numbers, %FFA, density, viscosity, and GC-MS analysis. The amount of N. oculata and T. chuii obtained from harvesting was 591.75 and 460.11 grams, respectively. The yield of oil extracted from N. oculata and T. chuii was 46.47% and 39.31%. Biodiesel yield obtained from N. oculata between 72.19-74.33% with the highest yield for N3 sample, meanwhile in T. chuii between 69-72.95% with the highest gain for T3 sample. In general, biodiesel samples meet national standard SNI for Biodiesel in density, viscosity and acid number. The methyl ester content of the GC-MS test in the best biodiesel samples is N1 sample at 68.4% and T6 sample at 79.49%.
Financial feasibility study of batching plant investment on Sigli -Banda Aceh highway construction project
Authors: Rani H A , Bonenehu R S , Mubarak M H 
Published: May 2020

Abstract
The construction of the Sigli - Banda Aceh highway project as long as 74 km stretches across two Regencies namely Pidie and Aceh Besar, generating the large demand for ready mix concrete. It is required the investors in providing ready mix concrete service and wishing adequate mutual exchange from each capital invested. The problem in this study is to investigate how the feasibility and business opportunity of a batching plant investment from its financial aspects. This study aims to determine the financial feasibility and business opportunities on batching plant investment of ready mix concrete at Sigli - Banda Aceh highway project. In this research data was collected and processed to obtain cash flow and Depreciation. The method used to determine the financial feasibility is by obtaining its investment valuation analysis from data processing. Those are Net Present Value (NPV), Annual Equivalent (AE), Internal Rate of Return (IRR), Benefit-cost ratio (BCR) and Payback Period (PBP). From the calculation, it is obtained that the profit obtained from NPV is IDR 12,145,111,515.27, the profit obtained from AE is IDR 3,818,104,138.07, IRR is above 40%, BCR is > 1 as 1,10, PBP is IDR 15,104,717,354.22 in the second year or equal to the investment period. It can be concluded that batching plant investment on Sigli - Banda Aceh highway construction project is feasible to be constructed and become a business opportunity for the investors.
Laterite Soil Behavior - Geotextile (Study of Laterite Soil, Tanah Laut District)
Authors: Setiawan I , Muzaidi I , Fitriansyah M 
Published: May 2020

Abstract
Land has different specifications and characters from each type. The land has the main function is as a support of a building construction be it buildings, roads, etc. Seeing from the function is inseparable from the mechanical properties of the soil such as cohesion (c) and soil shear angle (¢) where the higher the carrying capacity of the soil the better. The contact force (interface) between the soil surface and the surface of the soil reinforcement material is very dependent on the type of soil. Soil-geotextile contact will influence the carrying capacity of the soil, especially shear strength and soil cohesion. At present research on contact style interface (5) of laterite-geotextile soil. The method used in this research is to use laboratory-scale experimental methods. This research was conducted with the condition of the soil sample not submerged in water (unsaturated). The test results may be known laterite in Tanah Laut has value ratio 5/|) of 0.89 for the type of woven geotextile (HRX250), while the value of the ratio 5/(|) of 0.86 for the type of nonwoven geotextile (TS600).
Laboratory study: durability characteristics of Asphalt concrete binder course utilizing Bantak and Clereng as aggregate and Asbuton Lawele as fine aggregate (using Marshall Methods)
Authors: Ruhaidani E , Hardiani D P , Anggarini E , Perdana Y 
Published: May 2020

Abstract
Construction of roads and will continue and growing, while on the other side of the raw material reserves for the road less. Given this, the researchers tried to use the mining waste material at the bottom of Sabo Dam from Merapi which is bantak to substituted coarse aggregate and asbuton is substituted fine aggregate to tackle the lack of asphalt and to utilise local’s natural resources. This research carried out by using a mixture of 40% Bantak and 60% Clereng and substitute fine aggregate (substitution) with asbuton Lawele type 20/25 with the same amount. The asbuton concentrate variation that used in the test are (100%:0), (75%:25%), (50%:50%), (25%:75%), (0%:100%). All the specimens tested and analysed using Marshall Method as Public Work Department specification (2007), determined the optimum asphalt value of each specimen. All specimens with optimum value will immersed in water during half hour, 24 hours and 48 hours before Marshall test. Result of the test is used to know the asbuton substitution variation effects based on stability value, and residual strength index. The result shows that optimum asphalt value of asbuton specimens with percentage asbuton 0%, 25%, 50%, 75% and 100% are 6.2%; 5.6%; 5.25%; 5.1% and 5%. On standardise immersion asbuton variation of 0%, 25%, 50%, 75% and 100% the mix stability value are of 1498 kg, 1629 kg, 1405 kg, 1264 kg and 1258 kg respectively. While on 48 hour immersion, the residual strength indexs are 97.97%, 88.86%; 71.06%; 64.41% and 57%. In the conclusion optimum utilisation asbuton is 25% with optimum asphalt value 56% because has high stability, but has low durability.
Feasibility test on the performance of LoRa technology incorporated in the wireless sensor network
Authors: Astutik R P , Winarno H A 
Published: May 2020

Abstract
Wireless Sensor Network (WSN) and Internet of Things (IoT) technologies are developed rapidly in many implementations such as smart cities, smart offices, and smart transportations. They are closely related to communication technology which requires efficient power and covered long distance. To overcome these two problems, this paper proposes the design of a communication system for WSN using LoRa technology that has the ability to receiving lower power and wider area coverage. In this research, the implementation of this communication design is just a prototype that contains two nodes that communicate with each other by using LoRa technology as a communication system. The experiment which was based on measurement had the maximum distance of a point to point communication that reached about 200 m while the lowest received power was accounted at -98 dB. The use of the best spreading factor based on simulation was recorded at 7 using a bandwidth of 250 kbps and 10 using a bandwidth of 125 kbps. Showing the result, it can be concluded that 200 m was the longest distance which can be achieved by this prototype and this was useful for a small system.
Water content analysis effect on dielectric breakdown voltage in 500 kv transformer oil using coefficient correlation method
Authors: Auliq M A , Nugroho A B 
Published: May 2020

Abstract
Transformer is a vital component in distributing electrical power. The use of transformer oil which is continuously for a long time and not monitored can cause fatal damage to the transformer. This condition triggered by high water content in the transformer oil which causes breakdown voltage failure and electrical short circuit on the transformer. Therefore this study aims to analyze the influence of water content and breakdown voltage on 500 kV transformer oil type Kunlun Ki25x using the coefficient correlation method. The coefficient correlation method is statistical analysis technique used to look for relationships between variables that are quantitative. Two variables are said to be correlated if the changes in one variable will be followed by changes in the other variables regularly in the same direction (positive correlation) or opposite direction (negative correlation). For material testing and analysis data researcher using Megger OTS100AF instrument. This experiment conduct in paiton 9 power plant East Java for 36 month. Based on experimental data result researcher obtained a strong negative correlation value on the relationship of water content and breakdown voltage with the coefficient R = -0.88 on the function y = 0.7692x + 85.733 and it has characteristic that the increase in water content (x) is inversely proportional to increase the dielectric breakdown voltage (y). In addition, it is also known that the increase in transformer oil temperature is directly proportional to the increase in water content with a positive correlation of R = 0.92 at the function y = 0.4208x + 50.155. From the results above, it can be concluded that the parameters of water content and temperature have an impact on the value of the breakdown voltage and the performance of the transformer
Harmonisa in defibrillator equipment (DC Shock)using simulink Matlab
Authors: Harahap P , Oktrialdi B 
Published: May 2020

Abstract
The quality of electric power is a combination of voltage quality and current quality. Voltage disturbances often occur from the electricity network which can affect end users. Whereas, current interruption originates from end users which will affect the network. Electrical power quality problems in hospitals often occur due to non-linear loads, harmonic injection, and interaction between medical devices. Because the electrical power quality problem is cumulative, the detected minor event must be taken seriously. The nonlinear load distorts the current waveform and creates a harmonic current to the current system. The nonlinear load distorts the current waveform and creates a harmonic current to the current system. After the simulation, it can be concluded that DC Shock/Defibrillator equipment has Total Harmonic Current Distortion (THDi) equal to 76.1% and Total Harmonic Voltage (THDv) 3.5% with 330Watt power.
Stator slotted design of axial flux permanent magnet generator for low-speed turbine
Authors: Irfan M , Ariyanto R F , Syafaah L , Faruq A , Nurhadi  , Subeki N 
Published: May 2020

Abstract
The wind power plant has an important component, namely a generator which is an electrical engine that converts mechanical energy into electrical energy. This paper discusses the design of the permanent rotor axial flux generator (Single Rotor Single Stator) using a slotted stator and using a slotted stator reference design. To find out more in detail, this work was conducted by comparing four different generator designs, the number of slots and tooth widths. Testing the width of the teeth and the number of slots varied, including 12 slots width of teeth 23 mm, 15 slots width of teeth 18 mm, and 18 slots width of teeth 15 mm. The permanent magnet used in this study is neodymium iron boron, NdFeB 48/11 with a total of 10 poles. The desired reference power is 100 Watt with a speed of 500 Rpm. The outputs of each design in the form of voltage, current, power, and efficiency are discussed. The conclusion obtained that the additional teeth to the stator and increasing the number of axial flux slots affect the specified output parameters. The result of using teeth is that the voltage, current, and power are getting bigger and the more number of slots the smaller the voltage, current, and power.
The comparison of ergonomic risk assessment results using job strain index and OCRA methods
Authors: Restuputri D P , Masudin I , Putri A R C 
Published: May 2020

Abstract
Musculoskeletal Disorder (MDSs) is a real problem in terms of ergonomics. MSD is a muscle/pain disorder which is frequently undergone by operators after doing work, e.g. in the press line of a printing company. Some activities in press line are lifting books, reaching out the engine levers, and turning the engine levers. Many MSDs are undergone by operators, such as aches in the upper arms, hands, feet, and back. This is caused by excessive burdens and wrong posture when doing work. This study is aimed to compare the assessment results of operators’ body posture by using OCRA and JSI methods. OCRA (Occupational Repetitive Action) Index is a method used to evaluate and analyze a job. Meanwhile, Job Strain Index (JSI) is a method used to estimate the risk of pain in the upper body. Evaluation is carried out on repetitive activities. Based on the calculation results, the OCRA values obtained are 3.35 for the right hand and 1.13 for the left hand. Meanwhile, JSI value for the right hand is 9 and the left hand is 4.5. The results of the assessment indicate that these activities are categorized as high-risk so and need to be corrected. The author’s recommendation is by adding the number of operators on the press line.
Predictions of new students interest in entering the XXX University with statistic modeling
Authors: Priyana E D 
Published: May 2020

Abstract

Abstract. XXX is the establishment of one of Muhammadiyah’s charitable businesses in the field of education. From the beginning of its formation on May 25, 1980 until now XXX has been able to open 18 study programs plus other study programs at the Faculty of Health and the Faculty of Engineering which are planned to be opened. The addition of the study program is expected to filter the number of new student interests to become XXX residents. But unfortunately, the many universities in Gresik were opened, making XXX have to work extra in attracting new students. This research will only be focused on single forecasting on the number of new student interests in several study programs and one university. In the descriptive statistical results, it was obtained the results that Management Study Program contributed the most interest in entering students and as Study Programs which were not new, Fisheries Cultivation Study Program contributed the least interest of students entering. The results of cluster analysis were formed by 8 groups. Group 5 consisting of Management Study Program, Industrial Engineering and PGSD contributed the most interest in terms of the average count per study program. Forecast with Moving Average also proves that this group has a tendency to rise. ARIMA results (1 0 0) for one University produces a value that falls smoothly with a less significant value, but if left unchecked it can also harm the campus.
Consumable Fish Classification Using k-Nearest Neighbor
Authors: Winiarti S , Indikawati F I , Oktaviana A , Yuliansyah H 
Published: May 2020

Abstract
Fish is beneficial for the human body because it has high protein content. Consuming fish is necessary and expert knowledge is needed to identify fresh fish that are suitable for consumption. In this study, we developed a classification system to identify four classes of consumable fish by grouping fish images based on texture extraction and color features. We use fish meat and fish scale as identification parameters. Fish meat image is measured using the HSV colors model (Hue, Saturation, and Value) and GLCM (Gray Level Co-occurrence Matrix) method. We use these values for texture feature extraction of scales. Then we use k-Nearest Neighbor (kNN) as the classifier. The test results from 320 sample images show that the identification accuracy of tilapia meat is 90% and 97.5% for mackerel meat. Meanwhile for the scales, the accuracy up to 87.5% for tilapia scales and 95% for mackerel scales.
Workability of coconut fiber concrete with rice husk ash as a sand replacement
Authors: Riza F V , Karnelia D , Hadipramana J 
Published: May 2020

Abstract
Fiber concrete has been widely known for its ability to prevent cracks especially micro crack. Natural fiber concrete was one way to accommodate the use of waste natural fibers and at the same time producing sustainable materials. This research tried to examine the workability of Coconut Fiber Concrete (CFC) that incorporated 2% of Coconut Fiber (CF) with Rice Husk Ash (RHA) as a sand replacement with ratio 10, 20 and 30% respectively. Three types of water-cement ratios were used 0.38, 0.41 and 0.44. The result showed that slump value ranging from 3.5 cm and 4 cm. The addition of 20% of RHA resulted in the steady slump value for all water-cement ratio. The CFC is on the same par compare to the steel fiber concrete which incorporated 1.28% fiber.
Workspace Analysis and Dynamics Simulation of Manipulator based on MATLAB
Authors: Guoxian Niu , Liang Li 
Published: May 2020

Abstract
Workspace analysis and joint moment calculation are the main contents of manipulator’s design and calculation. According to the joint layout characteristics of the light cooperative manipulator, the workspace of the manipulator is divided into two parts: the arm workspace and the wrist workspace. The geometric method and Monte Carlo method are used to calculate the workspace of the manipulator and to guide the determination of the structural parameters of the manipulator. Based on Simulink/Simmechanics library, the dynamics model of six-axis serial manipulator is built and the joint rotational moment is calculated. The simulation results are in good agreement with the results of Newton Euler method. The simulation model can be used to replace Newton Euler method in the design process of the manipulator to improve the design efficiency.