bluuebunny/crossref_metadata_2025_split huggingface dataset:
Group decision support system for employee performance evaluation using combined simple additive weighting and Borda
Authors: Aziz T F A , Sulistiyono S , Harsiti H , Setyawan A , Suhendar A , Munandar T A 
Published: May 2020

Abstract
Subjectivity in performance appraisal is almost inevitable. Subjectivity is defined as a perspective based on personal views or feelings about a thing. Eliminate subjectivity factors so that assessing objectively based on certain criteria is difficult to implement, whereas subjectivity causes unfair competition and giving rise to an uncompetitive environment. This research was conducted to reduce subjectivity in a performance appraisal using the Group Decision Support System with Simple Additive Weighting and Borda methods. Employee performance appraisal at PT. Krakatau Osaka Steel was the object of this research. The Group Decision Support System has selected the best employees from 59 employee samples taken by the Purposive Sampling method resulted the 7 best employees according to the assessors with a Decision Support System, these results are then reselected to become the 3 best employees provided by the Group Decision Support System. The results of Group Decision Support System were found that A2 was in the first place with a Borda score of 0.218336, followed by 2 other employees, namely A52 and A1, with a Borda score of 0.206507 and 0.205753, respectively.
Moodle mobile development in enjoyable learning in computer system subjects
Authors: Wibawa S C , Sulistiyo E , Martiningsih N G A G E , Handoyo E , Johan A 
Published: May 2020

Abstract
The mobility of students in the world of education is displaced by social media which is a concern for educators to utilize, create or innovate in the world of Education. This study aims to utilize moodle mobile in the development of learning material as an online learning media that approaches social media platforms. The media application development method uses Waterfall, consisting of (1) requirements, (2) analysis, (3) system design, (4) Coding, (5) Testing system, (6) Acceptance Test. Sample testing on media experts, Acceptance Test uses a response assessment consisting of 5 aspects namely Perceived ease of use (PEOU), Perceived usefulness (PU), Perceived Enjoyment (PE), and Intention to use (INT). From the analysis of the Acceptance Test study for 130 students Perceived ease of use (PEOU) of 92.30%, Perceived usefulness (PU) of 86.34, Perceived Enjoyment (PE) of 88%, and Intention to use (INT) of 87, 10% Then from the two classes using independent T-Test two samples showed that the value of the T-test reached 0.046 where the value was below the significance value of 0.05, indicating that H0 was rejected and accepted H1, and so the result was a difference between learning outcomes using the method conventional and learning using Moodle Mobile.
Simulation and modeling of aircraft movements passing through VOR
Authors: Rachmanto A D , Iswanto I , Hernawati H 
Published: May 2020

Abstract
VOR/DME is an air navigation equipment, in flight navigation equipment is needed by the pilot as the direction to fly to the destination airport. The pilot tunes the destination VOR/DME frequency, the HSI on the aircraft will display the heading, bearing, deviation, course data, taking into account these data the pilot will arrive at the destination airport. The research objective is to make aircraft simulation software pass VOR/DME. The software is developed using the prototype method, which is by making a display model first, then comparing the display models that have been made with the existing VOR/DME simulation device. Simulation modeling are developed by placing VOR/DME at the appropriate latitude longitude, map modeling using MapX4.5, the plane is conditioned by selecting at a predetermined point, HSI instrument is modeling using GL Studio, the programming language used is C #. Calculation results obtained are visualized on the HSI instrument kit so that the user can see the flight direction of the aircraft on the map and visualization of the instrument. The calculation results are compared with the Garmin Integrated Flight Deck Trainer. With this software it is expected to be used in flight schools in Indonesia in the pilot learning process.
Speed control of DC motor based on wireless networked control system with time delay and saturation parameters
Authors: Tahtawi A R A , Baisrum B , Jadmiko S W 
Published: May 2020

Abstract
The integration of a wireless network in a closed-loop control system can provide several benefits such as flexibility, installation, and maintenance. However, the presence of time delay in the network system can reduce the control performance. On the other hand, control signal saturation is also the problem that must be overcome in designing a controller. This study aims to design a DC motor speed control by integrating wireless network in its closed-loop system. This concept is known as the Wireless Networked Control System (WNCS). The network parameter used in this study is focused on the time delay. In the controller side, we use a saturation parameter which usually occurs due to limitations of the input signal. The PI-AW controller is used due to having the ability to overcome the saturation of the control signal. The simulation results show that the PI-AW controller can produce the best responses if compared with PI linear and PI saturated with settling time under 1.5 seconds and overshoot less than 8% for three constant values of time delay. The control signal generated also does not exceed the maximum limit of 12 V.
Identification of object characteristics using the fusion sensor method in wireless sensor network environments
Authors: Hudaya R , Isdaryani F 
Published: May 2020

Abstract
This paper contains an explanation of the research results to solve the problem of selecting the category of mangosteen fruit in a grading process using method image processing through geometry measurements of flat areas, color measurements, shape and texture characteristics. The aim is to implement the selection process through a grading machine to be able to sort two categories of mangosteen fruit based on the characteristics that are trained using the Linear Discriminant Analysis method. The proposed method is the use of four image sensors which are perpendicular to each other in the grading process line. Each sensor provides a decision on the group of objects it identifies, “accepted” if it meets all the requirements or “rejected” if one of the requirements is not met. The results of each sensor decision are sent to the sink node in the wireless sensor network environment to be jointly decided using the method of redundant cooperative sensor whether the objects identified together can be “accepted” or “rejected”. The results of grouping give an error rate of ± 9.8%. The biggest identification error comes from the measurement of colors caused by light noise.
Simulation of source current harmonic elimination technique using phase shifting transformer
Authors: Kastawan I M W , Yusuf E , Fadhilah A 
Published: May 2020

Abstract
This paper presents design of phase shifting transformer to reduce source current harmonic generated by using of variable speed drive (VSD) in textile industry. Nine VSDs are used in a stenter machine of a selected textile industry. Each of these VSD generates source current total harmonic distortion (THD) in range of 43.91% to 50.34%, which contains all odd order harmonics except the triplen ones. The first method to reduce this source current harmonic is by using arrangement of three phase shifting transformers, which requires one Yy three-phase winding connection to produce 0° phase shifting, one Yz(+) three-phase winding connection to produce 20° phase shifting and one Yz(-) three-phase winding connection to produce –20° phase shifting. The second method is by using arrangement of nine phase shifting transformers, which requires one Yy three-phase winding connection with 0° phase shifting, four Yz(+) three-phase winding connections with 6.67°, 13.34°, 20° and 26.67° phase shifting respectively and four Yz(-) three-phase winding connections with –6.67°, –13.34°, –20° and –26.67° phase shifting respectively. Simulation results using MATLAB SIMULINK show that source current THD successfully reduced to 1.99% and 1.74% respectively when arrangements of three phase shifting transformers and nine phase shifting transformers are used.
The vibration monitoring system on the belt using neural network and interface with Labview and android apps
Authors: Akhinov I A , Kunarto W , Handaya D 
Published: May 2020

Abstract
Detection of belt conditions as a connector on the AC motor can be done by knowing how characteristics vibration signals. All vibration signals are processed by using Fast Fourier Transform (FFT) to the frequency domain. The vibration signal spectrums are collected and processed by the Neural Network method so that conditions of the belt can be grouped. The cause of the actual condition can be monitored on Labview and Android apps. The proposed method is based on analyzing frequency-domain features with the Neural Network. On this paper, it uses two hidden layers on the Neural Network. The Result of the experiment based on three grouped of the condition can get accurate by 94.03% to 96.52%.
Reactive power compensation in squirrel cage rotor type of three-phase induction motors
Authors: Tjahjono G , Ray F G , Fahmi I , Tamal C P , Modok R H , Setiawaty T 
Published: May 2020

Abstract
The purpose of this study is to produce: (1) The average real power in squirrel-cage rotor type of three-phase induction motor load. (2) The average reactive power in squirrel-cage rotor type of three-phase induction motor load. (3) The best capacitor value for saving reactive power in squirrel-cage rotor type of three-phase induction motor load. The research method used is a quantitative description approach by applying measurement methods in the Laboratory of Department of Electrical Engineering Education, Nusa Cendana University, Kupang. The study population was the entire squirrel-cage rotor type of three-phase induction motor controller using the star to delta method. The sample is a number of measurements of voltage, current, and power ion n a three-phase induction motor using the star to delta method. The conclusions of the research are: (1) The average real-power for delta-connection load without capacitor obtained a value of 24.4 [Watt]. The average reactive power for delta-connection load without capacitor obtained a value of 205 [VAR]. (2) The average-real power for delta-connection load with the capacitor of 11.57 [µF] obtained a value of 9,9 [Watt]. The average reactive power for delta-connection load with the capacitor of 11.57 [µF] obtained a value of 9,4 [VAR]. (3) Capacitor value 11.57 [µF] is the best value for reactive power savings in squirrel-cage rotor type of three-phase induction motor.
Utilization photovoltaic for electrical energy needs in Kelapan island, Indonesia
Authors: Pansuri I , Sunanda W , Gusa R F 
Published: May 2020

Abstract
Kelapan Island is one of the outermost islands in the Bangka Belitung Province. With a total of 30 households consisting of 120 people, electricity is currently from diesel generators. The dominant electrical equipment used on Kelapan Island are lights, televisions, fans, irons also several units of refrigerators and washing machines. For reducing the use of fossil energy, electrical energy sources are modeled for supply using a photovoltaic system. The average amount of electricity needed per house is 290.9 W, so the amount of power required for 4 hours at night is 34.908 kWh. The photovoltaic system will be modeled in 2 stages, centralized photovoltaic and photovoltaic at each resident’s house. The photovoltaic system that is installing in each residential house requires four units of 100 Wp solar panels, six units of 100 Ah batteries, 1 unit of a 400-watt inverter, and four units of solar charger controllers. Whereas for the centralized photovoltaic system model requires 97 units of 100 Wp solar panels, 160 units of 100 Ah batteries, 25 units of 400-watt inverters and 108 units of solar charger controllers.
Internet of Things (IoT): Web learning for smart school system
Authors: Rukmana A A , Mulyanti B 
Published: May 2020

Abstract
The Internet of Things (IoT) which is known today has grown rapidly, the integration of each object can be connected via the internet. With the sophistication of the IoT system also has an impact on the world of education which is currently still using manual systems, smart technology owned by IoT has changed the existing system. The purpose of this paper is to analyze and collect data about IoT that is currently developing at school. IoT can be used as a learning management system where web-based learning is the main focus. The method used is a literature review from journals related to IoT, web learning for smart school systems. The findings obtained are the integration of IoT with web-based learning, namely administrative services, service management, data analysis and learning services. These results can be used in education.
A technical and economic analysis of solar PV with local tariff policy in Indonesia
Authors: Adam K B , Ramdhani M , Suhartono E 
Published: May 2020

Abstract
Indonesia is still struggling to attract investors in developing the solar photovoltaic (PV) project. The government issued the first regulation on solar PV, announced in 2016. A revision on the local tariff regulation is conducted to reduce the rapid development of the solar PV investment. The major revision is made to change the contract scheme from a build-operate-own (BOO) to a build-operate-own-transfer (BOOT) scheme. This paper investigates how the new local tariff will drive investors and developers to invest in solar PV. This analysis is conducted to know the effectiveness of the policy and the risk of PV investment in Indonesia. Local tariff policy regulation targets PV developers to invest in the solar PV system areas. In the local tariff policy, each area has its PV energy tariff determined by the government. This research proposes a method for deciding demand by considering population data in selected regions to calculate the maximum PV demand of each area. The Levelized Cost of Energy LCOE is used to calculate the economic viability of the PV projects in selected areas in Indonesia. The results show that more than half of the selected areas are profitable for the PV project. The average profit of the projects of the selected areas is 3.21 cent USD per kWh. Most of the areas that have high PV demand have lower local tariffs. Therefore, these areas may not be profitable for developers. The new regulation also cuts the revenue significantly due to the new scheme contract.
A prototype of solar panel position control system based on image processing
Authors: Rahmawati D , Priharti W , Mardiana M I Y 
Published: May 2020

Abstract
The position of the solar panel towards sunlight is very influential on the electrical energy production. The solar panel orthogonal to the sunlight is the best position to produce electrical energy. The aim of this research is creating a prototype of the solar panel position control system. The expected position of the system is solar panels are always perpendicular to the sun. In this research, we used image processing to control the solar panel position. We used a webcam to capture a shadow image of a 4cm bolt that placed on a flat plane. Then, the image from the shadow is processed to get the angle of the sun. We use trigonometric formulas to convert bolt shadows into angles. After that, the angle used as input for the solar panel drive motor. Thus, the solar panel can be adjusted to follow the angle of the sun. So that the positions are orthogonal to each other. The research finding discovered that the prototype can always follow the direction of incoming sunlight with an accuracy rate towards the center point is 95% for azimuth (X-axis) and 96% for altitude (Y-axis).
Methods of determining safety boundary and PPE by analysing arc-flash incident energy in medium voltage panels
Authors: Mashar A , Mulyadi A D , Gifari D 
Published: May 2020

Abstract
Arc-flash events still occur frequently in industries especially in Indonesia and there are many operators and technicians have got burn injuries caused by it. To avoid this accident, this paper discus about arc flash and its incident energy as well as personal protective equipment (PPE) should be worn by those working with electric panels (switchgears). To demonstrate how incident energy is calculated and the protection boundaries are determined, a 6 kV, 3750 kVA utility panel in a geothermal power plant (60 MW) is used as object. The steps have to be done in this research are bolted fault current and arc fault current calculations, calculation of incident energy and determining both protection boundaries and the relevant PPE. As result, it is found that with protection setting clearing time of 0,12, the incident energy is 4,418 J/cm2 and the protection boundary is 1.4 m. The danger will increase with longer clearing time of relay or closer distance to the panel. This paper will hopefully be very help full for the responsible engineers to analyse the danger of any kind of panels and to determine PPE for workers.
Gene mutation detection for breast cancer disease: A review
Authors: Wisesty U N , Mengko T R , Purwarianti A 
Published: May 2020

Abstract
Breast cancer is one of the most common diseases suffered, especially by women, in the world, and about two billion new cases of patients with breast cancer in 2018. Therefore, it is very important to detect cancer early. Early detection of cancer can be done through the analysis of DNA abnormalities from blood cell samples, where the sampling does not require surgery, non-invasive and painless, and can reduce the sampling cost. DNA abnormalities can occur due to heredity or gene mutation. This paper presents a systematic review that includes an explanation of DNA sequences, gene mutations that occur in breast cancer, and bioinformatics techniques for detecting breast cancer. From several studies that have been conducted in the medical field there are mutations in the BRCA1, BRCA2, and PALB2 genes, where mutations in these genes can cause an increased risk of breast cancer. Other gene mutations associated with cancer risk are ATM, BARD1, CDH1, CHEK2, MRE11A, NBN, TP53, PTEN, RAD50, RECQL, RINT1. In bioinformatics, breast cancer detection based on DNA sequence data is carried out in three phases namely data mapping, feature extraction, and prediction / classification. The methods that can be used are Voss mapping and its variations for data mapping, statistical feature representation approach and Wavelet analysis for feature extraction, and regression approaches, probability models, Support Vector Machines, Neural Networks and Deep Learning for classification.
Biomechanical analysis on human gait and posture for development of floating backpack
Authors: Putra N K , Khagi H , Sriwarno A B , Suprijanto S 
Published: May 2020

Abstract
Floating backpack system or also known as suspended-load backpack has been known as a new type of backpack which able to reduce the effect of impact force from the loads carried in the backpack while walking or running. Particularly on the application for military or rescue team, this new backpack design claimed to improve the comfort and reduce the burden on the skeletal muscle as well as the risk of injury. In this research, we try to assess the biomechanics performance of our novel floating backpack design on reducing the impact force on the wearer by firstly analyzing the human gait cycle and posture adjustment. This analysis conducted by motion analysis method which able to track the change of position of certain points while walking and running. We tracked several points on the volunteer’s lower extremity and analyze its kinematics information throughout the walk and running cycle with a different pace and velocity. From this data, we try to get the standard gait model as a mechanical input force for the floating backpack system. Furthermore, with this 3D analysis we can also analyze the posture adjustment as the balancing mechanism of human body to compensate the different forces from the different state of walking-running cycle. A sinusoidal pattern with a frequency of 2-3 Hz are measured on the transition phase of walking and running, while the maximum amplitude was varying on throughout each cycle phase
Preliminary design of the implementation of automatic antenna radiation pattern measurement: Study of Yagi antenna radiation pattern
Authors: Simanjuntak A B , Mulyanti B , Juanda E A , Abdullah A G , Supriyadi T , Nurhakim A , Ramdhani M 
Published: May 2020

Abstract
The radiation pattern is an important parameter of the antenna performance. This parameter needs to be measured not only accurately but also as fast as possible. For this purpose, the automatic measurement system has been developed. In this research, the system is implemented to analyze the radiation characteristic of a Yagi antenna by measuring its radiation pattern. The measurement result of the patterns is compared to those of the table characteristics of the Yagi antenna as well as a computer simulation. For this purpose, a Yagi antenna is designed and realized as the radiation pattern measurement object. Then, the students experiment to measure and analyze the effect of parasitic elements on the radiation pattern performance of the antenna. The questionnaire is carried out as the method of the research and directed to the students of the Telecommunication Study Program, Bandung State Polytechnic, to get the perception of the object performance.
Comparison of online group discussion and class discussion learning for a soil mechanics class
Authors: Rachmawati T S N , Priadi C R , Sagitaningrum F H , Swantika B , Mairizal A Q , Abdillah A , Santoso H B , Junus K 
Published: May 2020

Abstract
Soil Mechanics had been a fundamental science material that needs a great understanding of the concept. Many attempts had been done in varying the study method for this course. An attempt to utilize online discussion learning will be discussed in this paper. To analyze the online learning experience, the Community of Inquiry (CoI) model was utilized. The CoI model divides the dynamic online learning process as social presence, teaching presence, and cognitive presence. This study aims to compare the application of CoI in the Soil Mechanics course between two different types of discussion under the Civil Engineering Department at a large public university in Indonesia. The students of the Soil Mechanics course were given two types of problem-based online discussions for two learning topics. The first one was a case study of Consolidation Settlement in a Group Discussion, while the second one was a case study of Seepage in a Class Discussion, which was done in one single discussion forum. Through quantitative analysis of the students’ discussion transcripts, it was found that cognitive presence was dominantly higher than teaching presence and social presence in both types of discussion. Finally, through an interview with students, it was found that students with active participation gain several benefits, among others, the better ability of systematic and critical thinking of interpreting a problem and growing sense of engineering compare to passive students.