bluuebunny/crossref_metadata_2025_split huggingface dataset:
Using decision rule in calibration of long gauge block on the conformity assessment scheme
Authors: Habibie M H , Hedrony O 
Published: December 2019

Abstract
Conformity assessment is a process commonly used in calibration activities to ensure the validity of the results of measurements or calibrations which is compared with specific requirements or standards. In this research the use of conformity assessment was carried out on long gauge block calibration activities in National Metrology Institute of Indonesia by determining objective criterion called decision rule. Decision rules are made by referred to JCGM 106:2012 standard that using two-sided acceptance method. In the two-sided acceptance method is used the acceptance/rejection limits such as: tolerance interval, acceptance interval and guard band. Conformity assessment result is stated as “accepted” if the calibration results are within the criteria of the decision rule, and vice versa. From this research, it was found that in the calibration process of long gauge block, the guard band value is obtained from the expanded uncertainty (U) value of the long gauge block (UUT). The conformity assessment results will be “accepted” if the reduced tolerance value (t
e
reduced) is greater than the measured deviation value (lx).
Impact of road rehabilitation zone on travel time to road user cost
Authors: Kalimanto D , Hadiwardoyo S P 
Published: December 2019

Abstract
Traffic movements in the city of Jakarta are linked to the Jakarta Outer Ring Road (JORR) Toll Road. This road network has a high traffic volume because it is integrated with other toll roads that connect other cities to Jakarta. The heavy traffic volume during the road rehabilitation will cause travel obstacles such as the increasing travel time to the long delay in traffic flow at the window time. The travel delay causes losses to road users. Road management must draw attention to the impact of the road rehabilitation zone to losses time by road users, especially on toll roads. This study analyzes the impact of speed changes in the work zone with two work areas. Traffic surveys have been carried out on the Jakarta Outer Ring Road (JORR) Toll Road section S using the roadpod metrocount tool. The results of this study show the increase vehicle operation costs by 169% to 206% due to a decrease in speed due to work zone. The results of this study are expected to be the consideration of road operators in determining the time in choosing of rehabilitation by minimizing the losses of time from the road users.
Reduces blade shaft deflection with improved mount design to increase vertical hybrid wind turbine performance
Authors: Erwin E , Soemardi T P , N Ikhsan M Y , Nugraha K 
Published: December 2019

Abstract
In a vertical hybrid turbine with a shaft bearing holder on one side, it has a shaft deflection problem that interferes with turbine performance. This study aims to improve the design of the turbine holder. The methodology used in this study is to analyse the deflection behaviour of the turbine when rotating. Next in the turbine design review, and the result is to increase the distance of the shaft holder bearings and increase the bearing diameter in the triangular frame. Deflection testing with the help of tracker software that’s able to measure deflection distance in one field when the shaft rotates. The results of the deflection comparison before and after the design improvement show a significant deflection reduction.
Investigation of mechanical properties on composite materials by several of severe plastic deformation (SPD) methods
Authors: Pramono A , Dhoska K , Alhamidi A , Trenggono A , Milandia A 
Published: December 2019

Abstract
The technology of severe plastic deformation (SPD) is the process on forming metals of large plastic strain that is used for mass production in order to make ultrafine-grained (UFG). Through research on the characterization of aluminium-based composite materials with several SPD methods, the ideal variable will be obtained in producing high-strength materials. The development of a new SPD method driven by requirements simplifies the process, so that it can be applied for mass production, some of the development of SPD technology is able to produce high plastic strain. The market for nanostructured materials produced by SPD technology is in sectors where superior traits such as specific strength is needed. This research is focused on a comparison of several SPD methods; APB, MAF, ECAP-PC and RPRF, in the scope of mechanical characterization on aluminium based composites. Result of mechanical properties obtained, the RPRF method is the best that is able to produce higher mechanical characteristics than other methods. That produces 75.9 VH10 hardness on RPRF, while APB 45.82 VH10, ECAP-PC 66.12 and MAF of 42.9 VH10
Study on the making of corrosion resistant steel (ASTM A36 Steel) coatings from a mix of graphene oxide + waterborne paint
Authors: Tjahjanti P H , Hidayat A R , Firdaus R , Iswanto  , Nurcahyo R , Fitri G A N 
Published: December 2019

Abstract
Steel coating as long as including ASTM A36 steel is generally carried out by galvanizing or coating to provide corrosion resistance. However, the problems that occur with the commonly used layer will break and peel off when the steel is removed. The purpose of this study is to make of corrosion resistant steel coatings especially for ASTM A36 steel from a mix of graphene oxide + waterborne paint. Weight loss method for calculate Corrosion Penetration Rate (CPR). Corrosion testing by immersing ASTM A36 steel samples in seawater (NaCl), and corrosion test for room temperature and 500°C. Final results showed that CPR values for ASTM A36 steel samples with graphene oxide + waterborne paint coating obtained CPR value that did not exceeded the allowable standard rate (0.5 mm/yr).
The study on mechanical properties of pack carburized low carbon steel using BaCO3as energizer
Authors: Negara D N K P , Widiyarta I M 
Published: December 2019

AbstractMachine components such as crankshaft and gear require hard surface and ductile core characteristics. One method to obtained such characteristics is pack carburizing. This research concern to compare the mechanical properties of carburized low carbon steel under different carburizers; GBC (80% goat bone charcoal + 20% BaCO3) and BC (80% bamboo charcoal + 20% BaCO3) and derived from reference. Pack carburizing was carried out by heating up to a temperature of 950°C, holding for 4 hours and quenching in the oil. The results showed that hardness, yield strength, tensile strength and modulus elasticity of carburized steels increased significantly, however, there was a decrease in elongation. The closer to the core the lower of hardness obtained until reach a total case depth of 1.5 mm and 2 mm for carburized using BC and GBC, respectively. The use of carburizer GBC produces carburized steel with a higher yield strength (51.75 kg.mm−2), tensile strength (74.58 kg.mm−2), and elongation (5.78 %) than carburizer BC but lower in hardness (558.13 HV1), modulus elasticity (256.79 GPa), and effective case depth (0.33 mm). The mechanical properties of carburized low carbon steels have fulfilled requirements as the material of gear or shaft.
Forging process on gamelan bar tin bronze Cu-25wt.%Sn post casting deformation to changes in microstructure, density, hardness, and acoustic properties
Authors: Slamet S , Kusumaningtyas I , Suyitno  
Published: December 2019

Abstract
Casting and forging are a method of formation to produce gamelan instruments. This study aims to determine the effect of forging deformation on the as-cast gamelan bar to changes in the microstructure, hardness, density, porosity, and acoustical properties of the gamelan instrument. The research material was tin bronze Cu-25wt.%Sn. The casting process uses a sand casting method with a pouring temperature of 1100 °C. The forging deformation process was done by reheating the as-cast gamelan bar at a temperature of 600 °C. The thickness of the as-cast gamelan bar is reduced by 30% after the forging deformation process. The observations on the as-cast gamelan bar show coarse microstructure with large grains, inclusions, and increased porosity. The forged gamelan bar shows finer microstructure, elongated grain, α lamellar, α phase like a plate, and decreased porosity. The hardness of forged gamelan bar increased by an average of 30.3% VHN, density increased by 9,56% and porosity decreased by 95% compared to the as-cast gamelan bar. Acoustic properties show an increase in the natural frequency between the as-cast gamelan bar and the forged gamelan bar are 712.5 Hz and 1058 Hz.
Optimization of flotation columns to provide added value of local sphalerite ore
Authors: Oediyani S , Haryono D , Suwandana R F 
Published: December 2019

Abstract
Sphalerite is the most important mineral in the formation of zinc metal. According to regulation of Ministry ESDM No.5/2017 stated that the minimum grade of zinc concentrates to be exported is 51%. Therefore, it is necessary to do a beneficiation process for sphalerite ore to fulfil the requirements. Sphalerite is hydrophobic mineral, therefore it is the best way to processed sphalerite by flotation. Flotation is the process of concentrating valuable minerals from impurities based on the nature of the mineral surface. Column flotation is a flotation technology without an agitator as a producer of air bubbles like conventional flotation machines. Recovery is the most important factor in flotation and it shows the rate of acquisition of the flotation process. The purpose of this research was to determine the effect of air flow rates (2, 2.5, 3, 3.5, and 4 L / min.), percent solid (7.5%, 10%, 12.5%, and 15%), dose of reagent frother (10, 20, 30 and 40 ppm), and particle size of ore (-80 + 100 #, -100 + 140 #, -140 + 200 #, -200 #) on ZnS recovery. The research was carried out by using a laboratory scale flotation column with 4.6 cm in diameter and 150 cm column height. The flotation reagent used was activator (CuSO4), pH regulator (NaCO3), collector (PAX), and frother (dowfroth 1012). The highest recovery (90.29%) was achieved at a flow rate of 4.0 L/min, while on variation of particle size the highest recovery was 85.55% at (-100+140) #. The increase in percent solid or dilution of pulp is not always followed by an increase in recovery and the highest recovery ((71.26%) was achieved at 7.5% solid. In addition, recovery increases with increasing doses of frother, the highest recovery (86.04%) was achieved at 40 ppm doses of frother.
The characteristics of aluminum AC4B composites reinforced by the fraction volume variations of Boron Carbide through the stir casting process
Authors: Lestari A D D , Syahrial A Z 
Published: December 2019

Abstract
Aluminum AC4B composite reinforced with Boron Carbide (B4C) was made by stir casting. The characteristics such as toughness, impact strength, and tensile strength were determined. Aluminum AC4B acts as a matrix in the composite given the fraction volume variation of B4C reinforcing particulate of 1; 3; 5; 7; 10 %Vf followed by the addition of 5 %wt magnesium as a wetting agent, 0.04 wt-% of Strontium as modifier agent, and 0.15 %wt Al-5 Ti-1 B as a grain refinement agent through the stir casting process. The composites produced was charatcterised both microstructure by Optical Microscope (OM), Scanning Electron Microscope (SEM), link to Energy Dispersive Spectroscopy (EDS), and mechanical properties such as characterize each composite material such as tensile, hardness, and impact tests. The phases formed in the composite were α-Al, Eutectic Silicon, primary Mg2Si, binary Mg2Si, ternary Mg2Si, β-Al5FeSi, Al2Cu, Al3BC, dan AlB2. There is an increase in mechanical properties of AC4B/B4C compared to Aluminum AC4B base material, such as its tensile strength which reaches 149.032 MPa and its hardness reaches 49.3 HRB.
Development of biodegradable plastic made from recycling of polypropylene (PP) with corn stalks powder
Authors: Anggono A D , Darmawan A S , Wijianto  , Prasojo C 
Published: December 2019

Abstract
The objectives of the study are to develop biodegradable plastic composite and to investigate the mechanical characteristic and water absorption. It was made from polypropylene (PP) mixed with corn stalks powder. In this study, the weight fraction of polypropylene and powder was varied as 95% : 5%; 90% : 10%; 85% : 15%. For the water absorption test, the specimens were soaked in the water for 1, 7, and 14 days. The highest value of the tensile test was delivered from a specimen of 95% : 5% weight fraction. The tensile test of the soak specimen for 0, 1, 7, 14 days was obtained 17.41 MPa, 16.94 MPa, 16.11 MPa, 13.51 MPa respectively. The strain was 1.07, 1.19, 1.01, and 0.87%. The modulus of elasticity was 1686.74, 1500.42, 1712.1, and 1558.49 MPa. By adding the powder to the plastic, it was able to absorb water. The water absorption after 1, 7, and 14 days of water soak was 0.607, 1.468, and 4.651% respectively. The specimen of biodegradable plastic composites with a 95% : 5% ratio have compatible characteristics with commercial plastics and can be degraded easier than the origin plastic.
The effect of electrolyte concentration and electric current on the quality of surface colouring on anodized aluminium
Authors: Zulaida Y M , Ramadhanisa A H , Partuti T 
Published: December 2019

Abstract
The use of aluminium metal in daily life has widely used colouring techniques to enhance the aesthetic value of the metal. Aluminium anodizing process can produce porous on the metal surface. The formed porous can be used to store and hold the colouring agent to make them more durable. The research intends to observe the colouring characteristics on the aluminium surface influenced by several parameters of the anodizing process, including electrolyte concentration and electric current. In this study the current H2SO4 concentration was used as a variable to improve the quality of staining on anodised aluminium surfaces. The anodization process was carried out on H2SO4 electrolyte solution with variations in concentrations of 10% to 20% and the current density used was 3 A to 5 A. The tests were carried out using micro Vickers to observe the hardness value. The hardness was higher at lower concentration of electrolyte solution due to thinner layer of oxide film, scanning electron microscope to observe the structure and visual observations for anodised colour quality. From the results given, the tendency of the lower current density the size and density of porous lower. With the same condition, the colour was darker than higher current density.
Hardware and User Perspective Assessment on Application of Smart Door Access
Authors: Anshar Muh , Anas Nasri 
Published: December 2019

Abstract
Nowadays, applications of technology in various aspects of human life have been widely adopted. This increasing application relies on the degree of technology involvement, which supports an interconnected communication among resources available in the location. Smart room is a room equipped with technology where electronic devices contained in it can connect and communicate with each other so that it becomes a system that can be controlled thoroughly. One part of the smart room is the door. The door can be accessed using a variety of technologies. some of them are RFID tag technology, PIN code, Fingerprint technology, and Infrared sensor technology. This study discusses the satisfaction of smart room users about the time, distance and technology used. System 1 uses RFID tag technology, and Infrared sensor, and on system 2 uses RFID tag technology, PIN code, Fingerprint technology, and Infrared sensor technology. The time used is 10 seconds on system 1 and 3-6 seconds on system 2 is considered sufficient. The distance of around 3.5 -4.2 is also considered quite good and is also considered to be close. The use of RFID tag technology, PIN code, Fingerprint technology for incoming access and Infrared sensor technology for outgoing access is considered appropriate. Respondent satisfaction in system 1 was around 79% and in system 2 around 74%. System 1 is the most desirable technology, then system 2, then the door with conventional locking.
Influence of Tropical Environment on Electrical Properties of Electrical Insulation Materials
Authors: Manjang S , Kitta I , Gassing  , Sahali I R , Maricar F 
Published: December 2019

Abstract
The development of optimal electrical insulation materials in the tropics continues. One of the development models is to look for fillers that allow it to be mixed with insulating materials (polymers, ceramics, and glass). This study aims to obtain the properties of electrical insulation materials in the form of polymeric materials (silicon rubber) which are filled with fly ash (coal-fired power plant waste) so that it can be used as a high-voltage electrical insulator. The activity that has been carried out was testing the performance of electrical insulating materials filled with fly ash under conditions under high electric fields and tropical environments. The research was conducted at the Electrical Engineering Building, Hasanuddin University, Makassar City, Indonesia. The performance evaluation of electrical insulation materials (silicon rubber plus fly ash) refers to the results of measurements of water diffusion characteristics and relative permittivity characteristics. The results of the study were in the form of information about the feasibility of coal-fired power plants to be used as fillers for electrical insulators in tropical environments. The results of this study are Fly ash added to silicone rubber to improve the electrical properties of the insulating material.
Temperature and Salinity Gradients Analysis for a Solar Pond Prototype
Authors: Muslimin Z , Gunadin I C , Anshar Muh , Siswanto A 
Published: December 2019

Abstract
In this study, a solar pond prototype is used to analyze the temperature and salinity gradients of alternative energy source processes. The study used two types of solar pond to investigate the temperature and salinity of gradients from each solar pond. The first solar pond utilizes sunlight as a heat source that emitted directly on the solar pond and the second solar pond utilizes the spotlights as a direct heat source emitted on the solar pond. The first solar pond is made of a cylindrical plastic tank of 1.05 m tall, 0.8 m in diameter placed outdoors in direct sunlight and the second solar pond model is made of a trapezium plastic tank with a height of 0.9m, the upper diameter 0.54m and a bottom diameter of 0.49m placed indoors with floodlights. The gradient temperature salinity and temperature measurement in the fest solar pond are smaller than temperature in the second solar pond however, the T3 temperature in the outdoor solar pond is larger than the indoor solar pond. The observation results show that the first solar pond generates the mean value of temperature and salinity of successive gradients 32 (°C); 30 % and the second solar pond has the average value of temperature and salinity of successive gradients 31 (°C); 28 %.
Insertion of 275 kV Transmission Line for Improving the Voltage Profile and Efficiency of Electrical Power System
Authors: Kitta I , Manjang S , Sahali I R , Maricar F 
Published: December 2019

Abstract
The location of electricity generation generally lies in the centers of renewable energy sources which are generally far from urban centers, such as in the province of South Sulawesi, Indonesia. This condition becomes a separate issue related to the quality of the voltage and the efficiency of the electrical system that uses 150 kV transmission lines to transmitted electrical energy from the power plants. Therefore, to avoid waste and lack of quality electricity, it is necessary to insert a new transmission line from these power plants to the city of Makassar. Where the transmission line built is 275 kV transmission line because it increases the voltage profile and is efficient compared to 150 kV transmission line even though the network is added to the bank’s capacitor. Therefore, this paper shows the reasons why a 275 kV transmission line was chosen for the improvement of voltage and reduction of power losses in South Sulawesi system.
Environmental Sensor Design Prototype for Genset Backups Power at Ground Station and Data Centers Based on Internet of Things Devices
Authors: Hidayat A , Ramadhan P R , Zainuddin  , Zainuddin H 
Published: December 2019

Abstract
Earth station and data center devices require stable backup power. The remote sensing earth station has 2 generators that can operate simultaneously or alternately. This Generator Set has optimal ability to work at room temperature up to 50 degrees Celsius. This environmental sensor prototype consists of three main parts: temperature sensor, ESP wifi module and website to display updated information at any time. The generator set system is only able to work under room temperature 50 degrees Celsius, if the room temperature exceeds 50 degrees Celsius the system will turn off the generator. This sensor system is used to monitor the room temperature so that it is not more than 50 degrees Celsius. All of the above systems can be accessed through the Local Area Network within the Parepare Remote Sensing Earth Station. With this system is expected to natural disturbances that occur in the antenna can be minimized so that the antenna ability to track and data acquisition can be maximized. The end of this prototype sensor is expected to help extend the life of antennas operating in the remote earth station LAPAN Parepare.
Indonesian Sign Language Letter Interpreter Application Using Leap Motion Control based on Naïve Bayes Classifier
Authors: Ridwang  , Syafaruddin  , Ilham A A , Nurtanio I 
Published: December 2019

Abstract
Most deaf children are born into hearing families and the majority do not begin their Sign Language learning before age 3-6 in school. As children learning Sign Language from infancy show higher language proficiency than those who do not, it underlines the importance of hearing parents learning how to sign. The recent innovation in the technology and introduction of new gesture control based devices, like leap motion controller. Technology that can track finger and hand gestures accurately at very low cost. The research method in Naïve Bayes algorithm, in order to classify 26 alphabet letter of Indonesian sign language including letter J and Z which using gesture for describe it. The Leap Motion controller is a consumer gesture sensor aimed to augment a user’s interactive experience with their computer and it was utilized as an interface for hand motion tracking without the need of wearing any external instruments. It use for derive feature data from the deaf children gesture recording to set data in application. The accuracy level of the test result reached 96%.
Cloud Classification Based on Images Texture Features
Authors: Nurtanio I , Zainuddin Z , Setiadi B H 
Published: December 2019

Abstract
An identification of cloud imagery is part of the cloud observation process which is very important to know the potential for weather changes, especially in the Sultan Hasanuddin airport area. The purpose of this research is to build an artificial intelligence model to identify and classify texture patterns of cloud images. The research used 80 clouds images data contained in the Sultan Hasanuddin Airport area. The data consist of four types of clouds, Altocumulus, Cirrus, Cumulonimbus and Cumulus. In this research, a feature extraction process using Gray Level Co-occurrence Matrix (GLCM) algorithm and Support Vector Machine (SVM) is used for the classification process. We used a set of 4 GLCM features. The 4 selected features are contrast, correlation, energy and homogeneity. Training and testing data using cross validation method with three stages validation. The highest level of accuracy is found in the third stage validation with an accuracy value of 85%.