bluuebunny/crossref_metadata_2025_split huggingface dataset:
Review of Cognitive Ergonomic Measurement Tools
Authors: Fista B , Azis H A , Aprilya T , Saidatul S , Sinaga M K , Pratama J , Syalfinaf F A , Steven  , Amalia S 
Published: September 2019

Abstract
In measurement and evaluation for a cognitive performance carried out on various tasks can use objective and subjective measurement tools. This study aims to review research on measuring instruments and provide its potential to be used in research related to cognitive ergonomics. The method that is used in this study is a review of article literature on studies that are subjective and objective measurement tools. the results of this study indicate that in each study usually does not only use one measuring instrument, to validate measurements, but another measurement tool is also used. And in research usually uses subjective and objective measurement tools for the same task.
Design and Implementation of Microstrip Patch Ultra-wide Band Antenna for Detection of UHF Partial Discharge
Authors: Nawawi Z , Sidik M A B , Jambak M I , Ahmad N , Ahmad M H , Kumar C L G P , Waldi E P , Aulia  
Published: September 2019

Abstract
Partial discharge (PD) is an electrical release or spark that occurs between two conducting electrodes that are not bridging, and it can occur at any points in the insulation system. PDs emit electromagnetic field radiation in the frequency range of 300 MHz to 1.5 GHz. Thus, it is more appropriate to detect and monitor partial discharge using an ultra-wideband antenna which offers more accuracy than the narrowband antenna. This paper proposes the design and implementation of a microstrip patch antenna which has been designed to possess wider detection performance of ultra-high frequency (UHF) PD signal. The PD spectra of the designed UWB antenna and the commercial whip antenna was compared and analyzed. The result shows that the UWB antenna can effectively detect the UHF PD signals that occur between two electrodes. As results, it is implied that PD measurement by using designed UWB antenna is found to suitable to detect the PD signals for online monitoring of high voltage equipment.
Design of poka-yoke system based on fuzzy neural network for rotary-machinery monitoring
Authors: Muharam M , Latif M 
Published: September 2019

Abstract
Early detection of machine failure will improve the performance of the production process. The Poka-Yoke device was developed to monitor the machine. The vibration signal is captured by sensors and inputted in Poka-yoke device for processing. Poka-Yoke device has two components, Fuzzy-Neural Network identification and decision maker. The first component, the time-domain signal is transformed into the frequency domain, magnitude and frequency are treated as Fuzzy membership functions by using the statistical parameters as mechanical harmonic distortion and then are trained by Neural Network. The second component, the decision is in the form of machine condition statements such as normal, alarm, and shutdown. Simulation’s results show that the method can be applied to identify the machine condition in term of bearing faults. Moreover, the Poka-yoke system that developed can be used to monitor machine condition automatically.
Parametric sensitivity analysis of SEL-421 distance relay algorithms used in compensated line
Authors: Rohadi N 
Published: September 2019

Abstract
This paper presents the use of Global Sensitivity Analysis (GSA) methods to analyze the sensitivity level of the performance of the impedance measurement algorithm of SEL-421 distance relay protection when used to perform transmission line protection with compensation circuit. This GSA technique was developed to see the dominance effect of system uncertainty (or factors). Two techniques that might be used for sensitivity analysis using GSA are Quasi-Monte Carlo (QMC) and data sampling with Sobol technique. Experimental is done with DIgSILENT software to do modeling of the power system, simulation, and calculation of impedance and algorithm error. The testing is carried out automatically with the help of the developed algorithm using DPL (DIgSILENT Programming Language). SIMLAB software, in this case, (with Sobol technique) is applied to generate some non-linear factor data and analyze the output of variations in impedance measurement errors.
The real-time condition monitoring system of gapless arrester based on ZigBee protocol and third harmonic leakage current as indicator parameters
Authors: Novizon  , Ulfiah S A , Malek Z A , Syafii  , Riska N , Aulia  , Darwison  
Published: September 2019

Abstract
Monitoring the condition of arrester in service have been presented in the past. Several methods of monitoring the condition of surge arrester were introduced by many researchers. Some and almost all the methods are based on measuring the leakage current. The goal of this study is to design a portable arrester condition monitoring system which is capable of performing arrester health analysis without the need for a voltage source reference — the design based on the previous research which introduces the new method to discriminant the resistive leakage current from total leakage current. The method for diagnosing arrester health is only with the leakage current waveform. The advantage of not needing the voltage reference is that the system can ultimately be used in the field where access a voltage reference about 150 kV is not practical. The design employs a ZigBee wireless protocol as well as a microprocessing based system utilizing an Arduino microcontroller. The ground side current from the arrester is fed through a resistor, which can then be used as a read voltage. The LabVIEW based graphical user interface was prepared to analyze an arrester’s data. The user connects the GUI to the Arduino via ZigBee, samples the waveform from an arrester and then additional data processing is executed. The main part of this processing involves the modified shifted current method on the sampled waveform. Upon conclusion, the user is left with only the resistive component of the arrester leakage current, which is displayed in both the time and frequency domains for analysis.
Condition based monitoring of gapless surge arrester using electrical and thermal parameters
Authors: Novizon  , Malek Z A , Syafii  , Ahmad M H , Aulia  , Ulfiah S A 
Published: September 2019

Abstract
A new method to assess the condition of metal-oxide surge arresters is presented. The thermal image and third harmonic leakage current are used as an indicator. The correlation between the leakage current and temperature of the arrester is processed using a neural network. The temperature profile of arrester, ambient temperature and humidity were as input to the neural network and the peak value of the third harmonic resistive current as a target. Results are presented with the training of neural network close to the target and testing result is 98% successfully.
Harmonic analysis in electrical system at Andalas University Hospital
Authors: Afni N , Nazir R , Waldi E P , Pawawoi A 
Published: September 2019

Abstract
In this paper, harmonic distortion in the electrical system at Andalas University Hospital is analyzed. The Total harmonic distortion (THD) was measured by The Fluke 430-II power analyzer for three days from 27th - 29th June 2018. The data were recorded every ten minutes. The THD of the current was from 3.09 % on Thursday at 08.40 (in phase L3) to 9.35 % on Thursday at 23.00 (in phase L1). The values of the THD show that high values of the THD occur at night from 18.00 to 08.00 at morning. The low values for the harmonic distortion of the installation occur during the day from 08.00 to 18.00 that occur for low active power. The harmonic distortion in the electrical system during the day was quite low. The current harmonic distortion was depending on the type of load. The non-sinusoidal current has harmonic content that interacts with the electrical system will create voltage distortion in the electrical system even if the supply is sinusoidal.
Performance analysis of error control coding and diversity in image transmission on wireless channels
Authors: Baharuddin  , Muharam M , Andre H , Angraini R 
Published: September 2019

Abstract
This paper discusses the performance of using error control coding that combines with diversity techniques in the transmission of images on wireless channels to get reliable communication on noise and fading. The performance of the transmission system is not only determined by the effectiveness of channel usage, but it is also determined by the reliability of the communication system that causes noise and fading. Error control coding used in this research is Reed Solomon (RS) code, while the diversity technique used in this research is Maximum ratio combining. RS code is used to correct errors that occur during wireless transmission, while Use of diversity Maximum Ratio techniques Combining expected can affect the number of errors so that the signal transmitted to the wireless channels becomes more robust against interference caused by transmission channels. By using error control coding and diversity, the quality of image transmission at the receiver is increased.
Performance evaluation of image transmission using diversity selection combining technique
Authors: Baharuddin  , Angraini R 
Published: September 2019

Abstract
This paper discussed a simulation of SPIHT image compression transmission on wireless channels by using RS code and diversity selection combining technique in wavelet domain to get better reconstruction image by minimizing errors that caused by fading and noise. RS Code and Diversity Selection Combining Method were used to combat errors during image transmission on wireless channels. When the bit stream data arrived at the receiver, the coding was used to recover the errors in the bitstream. Diversity was used to obtain multiple data streams corresponding to the transmitted image at the receiver. These individual image data streams were combined to form a composite image with the better quality. The results show both methods demonstrated quality improvement of the received image.
Characteristics of acoustic signals from lightning using a microphone array observation system
Authors: Hazmi A , Emeraldi P , Hamid M I 
Published: September 2019

Abstract
The acoustic signals of thunder provide information on the lightning channel, such as frequency, power spectra density, and images. In this study, to analyze the frequency variation in acoustic signals of thunder and to reconstruct the 3D lightning channel imaging, the short time Fourier transform (STFT) and differential time of arrival (DTOA) methods were used. The results showed that the frequency for four microphones varied from 4.88 Hz to 175.78 Hz. Furthermore, the range of power spectra density values for the four microphones was between -0.59 dB/Hz and -28.31 dB/Hz. This system can reconstruct 3D lightning channel imaging.
Robot mobile control based on three EMG signals using an artificial neural network
Authors: Rusydi M I , Aryeni I , Joefrinaldo  , Romadhon Z , Rusydi A 
Published: September 2019

Abstract
The EMG signals can be produced from the human muscle activity. This paper explains the control system of the robot mobile which uses the EMG signal from three muscles contraction such as the jaw muscles, the right arm muscles, and the left arm muscles. The peak values of the EMG signal was used as the input to the ANN system using the Backpropagation algorithm, and it produces the output which has nine target conditions; the forward, then turn right and then turn left where each of them has the variations such as the slow, the medium and the fast. The ANN has been trained with 270 of the training data, and it has been tested with 135 of the testing data from 15 respondents who performed muscle contraction activities. Based on the test result, there are only two unrecognizable data with the rate of the system accuracy is 98.52%. The movements of the robot mobile can be controlled based on the recognized movement patterns with the specified target conditions.
Development of rogowski coil sensor for partial discharge detection
Authors: Waldi E P , Frenzi A Y , Fernandez R , Darmawan  , Darwison  , Laksono H D , Aulia  , Hazmi A , Andre A , Abral H , Arief S , Nawawi Z , Ahmad M H , Hozumi N 
Published: September 2019

Abstract
This paper presents the development of Rogowski coil to detect the partial discharge. Rogowski coil sensor is composed of a ferrite core with a various number of turns which is 5, 10, 20 and 30 turns with a half circle and full circle configuration. The sensors need to be tested based on the number of the turns they have in reading the partial discharge signals. The sensor is connected to a digital measurement device such as a digital oscilloscope which has an input impedance of 50 ohms and 1 Mohm with a time frame duration greater than or equal to 20 ms. The reading comparison is not only between the proposed sensors but also with a commercial partial discharge sensor. The partial discharge signal is generated by a commercial charge calibrator. The measurement result shows that using low impedance lead to decreased noise but the reading is too small compared with using high impedance.
Formulation of optimization model of raw material composition to achieve clinker quality standards (Case study PT Semen Padang Plant IV)
Authors: Rijal S , Indrapriyatna A S , Adi A H B 
Published: September 2019

Abstract
Cement making process required four main raw materials, Lime Stone as a source of CaCO3, Silica Stone as a source of SiO2, Clay as a source of Al2O3 and Iron Sand as a source of Fe2O3. Proportion of raw materials approximately 80% CaCO3, 15% SiO2, 3% Al2O3 and the remaining 2% for Fe2O3. Due to operational constraints in the mine area, Indarung IV plant is experiencing a shortage of SiO2 source material that is Silica Stone, to anticipate this condition selected Pozzolan as alternative raw material because the SiO2 content in Pozzolan is above 60%. This research uses Linear Programming to get formulation model of optimization of raw material composition with Pozzolan as a substitute of Silica stone by minimizing cost. Ash composition factors and calories of fuel are not made into consideration. The results of this study obtained the most optimal raw material composition with minimal cost and meet the standard strength three days clinker min. 200 kg/cm2, by inputting the oxide composition of each raw material and the minimum and maximum constraint into the model formulation. The use of Pozzolan as a substitute raw material for Silica increases raw material costs 265.74 rp/ton.
Analysis of the application of quality management systems in the rubber industry based on ISO 9001:2015
Authors: Fajrah N , Putri N T , Amrina E 
Published: September 2019

Abstract
Increasing competition in the global market and high consumer expectations for quality products, encourage companies to produce quality products of international standards. The rubber industry is part of an industry group that is prioritized in its development in Indonesia. Based on these conditions, companies are always required to develop quality management systems that exist in the production process. The purpose of this study is to analyze the application of the quality management system of the crumb rubber industry to the ISO 9001: 2015 certification standard. The analysis was carried out on case studies and discussions with leaders of crumb rubber companies in Padang City. The success of the implementation is affected by indicators that influencing in ISO 9001: 2015 certification standards. Based on the results of the case study it can be seen that PT B has implemented an integrated quality management system in the company’s business processes. On the other hand, PT A still needs much improvement in implementing an integrated quality management system and integrated with the company’s business processes. It can be concluded that a strong top management commitment is not supported by the application of a quality management system. The implementation of a quality management system has not been optimally demonstrated by the company’s quality control documentation system is still incomplete and the company has not involved all aspects of the company in the implementation of quality management systems.
A framework to improve equipment effectiveness of manufacturing process - a case study of pressing station of crude palm oil production, Indonesia
Authors: Susilawati A , Tasri A , Arief D 
Published: September 2019

Abstract
Overall Equipment Effectiveness (OEE) has been widely used to measure the performance of the production process. A well-performing company is a company that has a high OEE score. Increased the OEE score can be done by minimizing six big losses that greatly affect the score of OEE. In this paper, a framework to determine the actions needed to minimize the six big losses is recommended. The framework was then used to determine the action to minimize the six big losses in palm oil mills. A total of 7 actions were required. The highest ranked action, the most important action, was the improvement of raw material quality while the lowest ranked action was to increase the number of workers.
Effect of pipe diameter changes on the properties of fluid in closed channels using Osborne Reynold Apparatus
Authors: Nur A , Afrianita R , Ramli R D T F 
Published: September 2019

Abstract
The flow profile in the channel will affect the velocity of fluid distribution. One factor that influences the flow profile in a closed channel is its diameter. Therefore, this study aims to analyze the effect of changes in pipe diameter on the nature of fluid flow in closed channels using Osborne Reynold Apparatus. This tool uses a vertical glass pipe with a diameter of 1 cm and 3 cm. The operation of the Osborne Reynolds Apparatus is carried out by flowing the fluid through a channel with a PVC type pipe pumped with a Submersible pump into an acrylic tub, then passing a vertical clear glass pipe. The Reynolds value obtained from each test equipment is 1,323-5,748 with friction factor 0,03-0,04 on Osborne Reynold Apparatus 3 cm diameter and 1,103-4,512 with friction factor value 0,03-0,05 at Osborne Reynold Apparatus 1 cm diameter. It is known that the greater the channel diameter, the greater the Reynolds value will be, while the friction factor will be smaller. Regression and correlation analysis are carried out with the aim to determine the relationship the values obtained and it is obtained that there is a very strong relationship among time, discharge, flow velocity, Reynolds number and friction factor in each test equipment. It is evidenced with the coefficient of determination and the correlation coefficient obtained (R2 = 0.994-1,000 and r = 0.981-1,000).
Synthesis and characterization of calcium precursor for hydroxyapatite synthesis from blood clam shell (Anadara antiquata) using planetary ball mill process
Authors: Gunawarman  , Affi J , Yetri Y , Ilhamdi  , Juliadmi D , Nuswantoro N F , Fajri H , Ahli A , Gundini R , Nur Hadi 
Published: September 2019

Abstract
Calcium precursor for synthesizing of hydroxyapatite can be obtained from natural material like A. antiquata (blood clamshell). Calcium synthesis was carried out through ball mill and calcinations process with high purity residues. Scanning Electron Microscopy (SEM), Energy Dispersive X-Ray Analysis (EDX), X-Ray Diffraction (XRD), and Fourier Transform Infrared Spectroscopy (FTIR) were used for characterization. Analysis for blood clam shell powders revealed a reduction of average size from 217μm to 76μm and size of powder crystal is 29,2nm. This powders contained calcium element about 49,67% as the effectiveness of calcination and ball mill process. In morphology, powders have fine needles-like shape but still in agglomerate that can be reduced with extended ball mill process. This powders had a reduction of weight powders from 35,5% to 17,7% and dominated Ca(OH)2 that could be used as calcium precursor in synthesishydroxyapatite.
Production of pig iron nugget from low-grade iron ore and pyrolyzed oil-palm-empty-fruit-bunch composites
Authors: Setiawan A , Suratha R P , Harjanto S , Kusrini E 
Published: September 2019

Abstract
Utilization of low-grade iron ore and pyrolyzed oil palm empty fruit bunch (EFB) is an effective way as the solution to deal with the depletion of iron reserves and administer of empty fruit bunch waste. This study was aimed to analyze the pig iron that is produced by carbothermic reduction of low-grade iron ore with pyrolyzed palm oil EFB as a reductant. The ore from Lampung was reduced at temperature 1400°C and 1450°C for holding time 40 minutes with inert condition (N2 atmosphere). The structures of pig iron were studied by using X-Ray diffraction (XRD), and the microstructures and chemical composition were analyzed by using Scanning Electron Microscopy-Energy Dispersive X-Ray Spectroscopy (SEM-EDS). It was found that iron nugget that was reduced at 1450°C for 40 minutes that was wholly separated from its slag, with reduction degree 98.5%, metallization degree 99.2%. The microstructure has metallic iron as a base with some pores. On the other hand, the other iron nuggets that are not separated from its slag consist of two prominent phases, metallic iron and lamellar fayalite (Fe2SiO4).
Experimental evaluation of tuned liquid column damper and tuned mass damper in a space structure model
Authors: Son L , Bur M , Andria A D 
Published: September 2019

Abstract
Vibrations in building structure due to external force can be minimalized by absorber installation. One technique in that regard is through the dynamic absorber. Previous reports have developed double dynamic vibration absorber namely Tuned Liquid Column Damper (TLCD) and spring-mass system. However, the conduct has been applied to reduce vibrations occurred on solely one-sided movement. This study investigated the double dynamics absorber utilization of Tuned Liquid Column Damper (TLCD) and spring-mass system that was designed to be capable of vibration reduction caused by interfering forces on two-sided structures hence the implementation can be more applicative.
Atmospheric corrosion map of structural steel in industrial area: a preliminary investigation
Authors: Huzni S , Affandi  , Tanjung I , Fonna S 
Published: September 2019

Abstract
This paper explains the results of the initial stage of investigation of atmospheric corrosion on structural steel in industrial zones. Investigation is carried out on two shape profile of low carbon steel that is widely used for the construction of structures, namely sheet, and elbow. Corrosion rate measurement process and preparation were carried out based on ASTM G-50 and ASTM G-1 standards, with a total exposure time of six months in Medan Deli District, Medan, North Sumatra. The results of this initial stage of the investigation show that the average corrosion rate of low carbon steel for each profile is different, but overall it is still in the “good” category. This investigation will be continued for up to twelve months to obtain more complete data.
Design of solid desiccant air conditioning system
Authors: Saputra D A , Saputra N A , Susanti L , Fithri P , Putra D I 
Published: September 2019

Abstract
Currently, solid desiccant air conditioning system (SDACS) is an alternative to utilize solar energy to resolve environmental and energy issues resulting from the use of conventional vapor compression of air conditioning systems. SDACS can maintain the thermal comfort of a room with optimization of solar thermal energy and minimal use of electrical power. Present work in this paper is to design a solid desiccant air conditioning system of a closed room with 18 m3 of total volume. The desiccant wheel is used to dehumidify air in the room, and evaporative cooling will be decreasing the temperature of the air. The result shows the lower temperature can be reached 24°C.